Which Touch Screen Cell Phone Is the Best Out Right Now?

Principle of touch screen capacitance screenTouch screen is the most friendly computer user interface at present. It is more and more widely used in consumer electronic products. The touch detection device and touch screen controller are good. The mechanical structure of the detection device is damaged in the process of touch screen device, resulting in the decline of touch accuracy and shortening of service life of the touch screen; In addition, the cost of commonly used capacitive and resistive touch screens is relatively high. Inductive touch screen can avoid damage to the touch detection device during touch and prolong the service life of touch screen products.The working principle of inductive touch screen, as well as the hardware circuit and part of the program design of the controller, all of the controller circuits have passed the verification. The non-direct contact touch of inductive touch screen avoids the damage to the touch detection device, prolongs the service life of the whole touch control system, and the repetition accuracy and touch sensitivity of touching the same point meet the expected design requirements.The capacitive induction touch screen is not affected by dirt, dust or oil stains, but it will be affected by the surrounding environment to varying degrees because it adopts the electric field coupling principle. At the same time, the capacitive induction touch screen has serious drift phenomenon.What are the application areas of touch screenTouch screen has become a hot spot in the market. In the market, shopping malls, hotels and other places, it is still dominated by smart phones. The growth momentum of the smartphone market slowed down and entered a period of gentle development. The application of touch screen outside mobile phones, such as automotive electronics, retail, medical treatment, public facilities, leisure and entertainment, will promote the rapid growth of touch screen market.In addition to applications in large fields, touch screens can be innovated in subdivided fields. In the field of "pen writing tablet", innovate the touch screen.The products have been extended to tablet with pen writing function, e-book, all-in-one machine, electronic whiteboard, etc. And the pen and hand can be used at the same time. When one hand is touching, the pen can also write at the same time.The traditional materials of capacitive touch screen are ITO, metal grid, nano silver wire, carbon nanotube, conductive polymer, graphene, etc. Metal mesh and nano silver wire have more supporters. Both materials are metals (silver or copper) and their conductivity is better than ITO.

Every day, new products, new experiences, professional membrane switch proofing factory, 12 hour expedited shipmentFrom the hot sale of Samsung Galaxy edge flagship series to the advent of various curved screen bracelets and TVs, it is no doubt that curved screen technology has been widely valued and sought after by consumers and the industry in recent years. In the future, with the continuous development and improvement of fixed curvature curved screen technology, the flexible touch screen that can realize arbitrary bending will become an important development direction. On the 25th, at the 13th International touch screen and display technology development forum, Huang Hanfeng, deputy general manager of touch R & D from Shenzhen oufeiguang technology, made a detailed introduction to the flexible touch screen from the perspective of the industrial chain around the four key elements of flexible display, flexible touch, flexible cover plate and flexible bonding.Flexible displayFor LCD display, the LCD is usually responsible for controlling the display gray, and the three primary color filters control the display color, which requires them to correspond one by one in order to display normally. If the LCD panel is used as a curved screen, the inner circumference and outer circumference will be unequal, and the original one-to-one corresponding liquid crystal and filter will have position deviation, resulting in color distortion. In addition, it will also cause a series of problems such as light leakage, dark screen ghosting and snowflakes. Therefore, for the curved screen, the OLED display technology represented by AMOLED has almost become the best choice.Huang Hanfeng said that at present, Samsung is the undisputed AMOLED overlord in terms of patents, production capacity, yield and technology accumulation. The sixth generation AMOLED panel that began mass production at the end of 2014 can now produce 50000 pieces per month, and the yield can reach 60%. The second is LG, but LG has been focusing on large screen curved TV. At present, with the increasingly obvious trend of small screen AMOLED, LG is also accelerating the layout of small and medium-sized flexible screens. Although its output is not as good as Samsung, its yield can also reach more than 60%. The latest release of Xiaomi note 2 is the flexible AMOLED screen of LG. In addition, Japan's JDI and sharp (already acquired by Hon Hai), Taiwan's Youda, domestic BOE, Rouyu and other screen manufacturers are also accelerating the layout of their own AMOLED technology. It is the general trend for AMOLED to replace LCD.Flexible touchIn terms of touch control, ITO (indium tin oxide) transparent conductive film has become the most important touch layer material for display screens such as non curved LCD and OLED due to its good light transmittance, low thickness, excellent hardness and conductivity, mature manufacturing technology and many other reasons. However, as ITO itself is a brittle material, it is not suitable for making flexible touch layer with large curvature or even free bending, and the cost and cost are high. At present, it accounts for about 30% - 40% of the cost of the upstream material part of the whole touch screen industry, and uses "indium", a rare metal with limited reserves. Therefore, with the advent of the era of curved surface and flexibility, it is likely to be replaced.Huang Hanfeng said that at present, the main substitutes for ITO materials are graphene, carbon nanotubes, nano silver and metal mesh. Graphene and carbon nanotubes are very good substitutes for ITO from the characteristics of the material itself. However, graphene is still in the R & D stage and is still far from mass production. The industrial mass production technology of carbon nanotubes is not perfect, and the conductivity of the thin film products made of carbon nanotubes is not as good as that of ITO. Therefore, from the perspective of technology and marketization, metal grid and nano silver technology will be the protagonists of development in recent years. Metal grid technology has been applied in some PC display markets.The metal mesh technology mentioned here is a conductive metal mesh formed by pressing metal conductive materials such as silver and copper or oxides on thin film substrates such as pet. Its main advantages are low raw material cost and good folding ability. However, due to the problem of Murray interference ripple caused by yield, output and high-speed pixels, it is more suitable for desktop all-in-one computers, laptops, televisions and other products with low resolution and relatively long-distance use.Nano silver technology means that nano silver ink material is coated on pet or glass substrate, and then laser lithography is used to depict the conductive network of nano silver wire. Its main advantages are high yield, small linewidth, good conductivity and folding resistance, while its disadvantage is high cost. Moreover, compared with metal mesh, nano silver material has smaller radius of curvature and small resistance change rate during bending. In addition, due to the linewidth, it is more suitable for high-resolution close-up scenes such as mobile phones, smart watches and bracelets."By comprehensive comparison, I think nano silver has more advantages than metal grid," Huang Hanfeng said.Flexible cover plateIn order to bend at will, in addition to solving the flexible display and flexible touch, the last and most critical part is the flexible cover plate and fitting. However, due to its hard and fragile characteristics, glass cover plate is not the best choice in the field of flexibility.Huang Hanfeng said that compared with glass, pet and PI (polyimide) materials with high surface hardness and high light transmittance are better choices, but at present, pet and PI also have many problems to be solved. On the one hand, they are not resistant to high temperature and have poor light transmittance: pet and PI will have problems of partial melting and property change at low ambient temperature, and they do not have good light transmittance compared with glass.Secondly, it is difficult to achieve a balance between hardness and folding. Huang Hanfeng said that if you want to meet certain hardness requirements, you need to apply the hardened layer, but after coating the hardened layer, after repeated folding, the hardened layer will crack and reduce the hardness. Therefore, how to achieve a balance between the two is the biggest bottleneck at present.Compared with the flexible cover plate that needs further development, the 3D glass cover plate necessary for curved screen mobile phones has a very good development prospect.Some data show that 2018 may become the outbreak year of 3D glass cover plate. It is expected that the mobile phone penetration rate of 3D glass cover plate will exceed 50% around 2020. With the maturity of 3D glass cover plate processing technology and the decline of unit price, the penetration rate will further improve. It is expected that the market scale will reach more than 19 billion yuan in the future.Huang Hanfeng said that the common manufacturing processes of 1R (single radian bending) and 2R cover plates have been basically mature. They basically achieve a bending effect through hot bending technology. The difference is mainly in the coating of hardened layer. However, the yield is a problem to be solved, which is basically only 30%, and there is no room for improvement in the short term. If 4R is to be done in the future, the yield will be lower. Therefore, the yield is one of the urgent problems to be solved in the manufacture of cover plate.Flexible fitAfter the cover plate is selected, it is fitted, that is, the cover plate is integrated with the touch and display layer below to form a complete module. At present, there are two common methods: roller type and vacuum bonding: the roller has high efficiency and needs to roll the pasted object. The efficiency of vacuum type is relatively low, but it does not need to roll the pasted object, so it is not easy to cause damage to the pasted object.Huang Hanfeng said that if the curvature is large, you can only choose vacuum bonding. However, for the possible 4R bonding in the future, due to its special four side bending characteristics, it is difficult to avoid wrinkles and bubbles in places with large radians even if vacuum is adopted. At present, the industry has adopted customized extrusion airbags or plastic parts to alleviate this problem, but it has not been completely solved. Therefore, the industry still has room for progress in multi surface and high curvature fitting technology.Huang Hanfeng frankly said: "from the perspective of the supply chain, it will take several years for the flexible screen to really realize mass production. At the same time, it also needs the upstream and downstream supply chain to jointly overcome the relevant technical problems."For future development, Huang Hanfeng believes that the integration of various modules will be the general trend. He said: "in the incell technology of LCD, ITO touch film and liquid crystal layer are integrated together, which is a good integration. Now the fingerprint module is independent, and it can also be integrated with touch in the future. I think there will be a process of mutual integration and progress between functional modules in the future."

(source: Rongji igniter)The touch screen is a man-machine interface. Our commonly used mobile phone input is also a touch screen, which is a capacitive screen. When fingers massage the touch screen interface, there will be a change in capacitance, and the chip in the mobile phone will sense this change and convert it into a voltage signal, that is, a standard analog quantity (if a point is a switching value, the switching value can be regarded as a special analog value), and then read it through the single chip microcomputer for easy processing, which represents some information. Generally, the resistance screen is used in industry, and the reason is similar.Whether it's resistance, capacitance or even ultrasonic waves, they are just an induction medium. They are installed on the outermost side of the touch screen, which is called the touch panel. There is also a layer of glass inside, which is used for display, called liquid crystal. The two are separated. When the finger touches the touch panel, the industrial touch screen senses a certain amount of resistance. If it's just a point, it's OK Directly output a switching value to the single chip microcomputer. The single chip microcomputer has drawn up a standard, and you will know what action significance you require it to perform.Similarly, you can also output an analog quantity on the touch screen interface, which can be regarded as a multi-channel resistance signal, that is, it represents the output of a group of continuous analog quantity modes to the single chip microcomputer, and then quantified into multi-channel switching quantity. Generally, the accuracy is poor. For example, you can use 8-bit switching quantity to represent an analog quantity. The frequency of the frequency converter you said is generally 0-50Hz, while 8-bit on The closing value corresponds to 0-255 (2 ^ 8) For example, 00000001 represents 1Hz, 00000011 represents 3Hz, 00001111 represents 15Hz, and so on. Each frequency value has a digital quantity corresponding to it. This process is the so-called coding, because the single chip microcomputer only knows the binary code, it is necessary to quantify the analog quantity in decimal system into 01 binary code, and each code corresponds to a unique physical meaning.When you output 15Hz to the touch screen, the touch screen actually stores an 8-bit binary code such as 00001111. Then this code is stored in the register on the circuit. Then, to transmit this code to the frequency converter, the touch screen needs to be completed through some communication protocols, such as 485 and 232 at the bottom. This What are these communication protocols? They can be simply understood as a transmission and "translation process".For example, if you are Chinese and want to communicate with an American, you speak Chinese and Americans speak English, but each word referred to will have a corresponding standard. If you set such a standard, you can understand each other. For example, the Chinese "morning" corresponds to the English "morning". So you say the Chinese "morning" When the translator hears it, he will say it as the corresponding English "morning" to the Americans.The 15Hz of the touch screen should be transmitted to the frequency converter. In fact, it is to transmit the 8-bit data such as 00001111 of the touch screen to the frequency converter. The 01 code is essentially a pulse. From the perspective of the circuit, as long as there are two lines, one high level and one low level, so that the pulses can be sent one by one in a certain order. If you want to transmit faster, improve the pulse accuracy The frequency, that is, the baud rate and other parameters can be set. The data sent each time is a series of pulses in a group, which is a "frame". After sending one "frame", stop a little and send another "frame" Of course, in the process of transmission, it is also necessary to let the other party know what type of data this is and consider the data reliability. Therefore, some start bits, stop bits, check bits, etc. are required, because in the data sent at one time, the data is a little longer than the upper 8 bits, such as 10 bits.In the design of the frequency converter, of course, these receiving circuits are also considered. Each time it receives a series of pulses, it will read it into its single chip microcomputer, and then judge the meaning and function of this data, that is, after translation, it knows what it means. Because in the touch screen, the frequency code is not necessarily 15Hz, which is 00001111, which is also It may be 00001100, so it needs to change it into the corresponding 00001100 first, and then adjust the PWM control IGBT module to perform the operation of this frequency.

(source: Rongji igniter)The touch screen is a man-machine interface. Our commonly used mobile phone input is also a touch screen, which is a capacitive screen. When fingers massage the touch screen interface, there will be a change in capacitance, and the chip in the mobile phone will sense this change and convert it into a voltage signal, that is, a standard analog quantity (if a point is a switching value, the switching value can be regarded as a special analog value), and then read it through the single chip microcomputer for easy processing, which represents some information. Generally, the resistance screen is used in industry, and the reason is similar.Whether it's resistance, capacitance or even ultrasonic waves, they are just an induction medium. They are installed on the outermost side of the touch screen, which is called the touch panel. There is also a layer of glass inside, which is used for display, called liquid crystal. The two are separated. When the finger touches the touch panel, the industrial touch screen senses a certain amount of resistance. If it's just a point, it's OK Directly output a switching value to the single chip microcomputer. The single chip microcomputer has drawn up a standard, and you will know what action significance you require it to perform.Similarly, you can also output an analog quantity on the touch screen interface, which can be regarded as a multi-channel resistance signal, that is, it represents the output of a group of continuous analog quantity modes to the single chip microcomputer, and then quantified into multi-channel switching quantity. Generally, the accuracy is poor. For example, you can use 8-bit switching quantity to represent an analog quantity. The frequency of the frequency converter you said is generally 0-50Hz, while 8-bit on The closing value corresponds to 0-255 (2 ^ 8) For example, 00000001 represents 1Hz, 00000011 represents 3Hz, 00001111 represents 15Hz, and so on. Each frequency value has a digital quantity corresponding to it. This process is the so-called coding, because the single chip microcomputer only knows the binary code, it is necessary to quantify the analog quantity in decimal system into 01 binary code, and each code corresponds to a unique physical meaning.When you output 15Hz to the touch screen, the touch screen actually stores an 8-bit binary code such as 00001111. Then this code is stored in the register on the circuit. Then, to transmit this code to the frequency converter, the touch screen needs to be completed through some communication protocols, such as 485 and 232 at the bottom. This What are these communication protocols? They can be simply understood as a transmission and "translation process".For example, if you are Chinese and want to communicate with an American, you speak Chinese and Americans speak English, but each word referred to will have a corresponding standard. If you set such a standard, you can understand each other. For example, the Chinese "morning" corresponds to the English "morning". So you say the Chinese "morning" When the translator hears it, he will say it as the corresponding English "morning" to the Americans.The 15Hz of the touch screen should be transmitted to the frequency converter. In fact, it is to transmit the 8-bit data such as 00001111 of the touch screen to the frequency converter. The 01 code is essentially a pulse. From the perspective of the circuit, as long as there are two lines, one high level and one low level, so that the pulses can be sent one by one in a certain order. If you want to transmit faster, improve the pulse accuracy The frequency, that is, the baud rate and other parameters can be set. The data sent each time is a series of pulses in a group, which is a "frame". After sending one "frame", stop a little and send another "frame" Of course, in the process of transmission, it is also necessary to let the other party know what type of data this is and consider the data reliability. Therefore, some start bits, stop bits, check bits, etc. are required, because in the data sent at one time, the data is a little longer than the upper 8 bits, such as 10 bits.In the design of the frequency converter, of course, these receiving circuits are also considered. Each time it receives a series of pulses, it will read it into its single chip microcomputer, and then judge the meaning and function of this data, that is, after translation, it knows what it means. Because in the touch screen, the frequency code is not necessarily 15Hz, which is 00001111, which is also It may be 00001100, so it needs to change it into the corresponding 00001100 first, and then adjust the PWM control IGBT module to perform the operation of this frequency.

High price recycling in all regions of the country: (13255216919 synchronous V-letter) brand new / unlimited disassembly, unlimited models.The brands and models acquired are:Delta series: Delta PLC module, delta touch screen, delta frequency converter, delta temperature controller, delta A2 servo / delta B2 servo 200W 400W 750WPanasonic series: Panasonic servo driver, Panasonic servo motor, Panasonic sensor, Panasonic PLC moduleSiemens series: S7-200 series, S7-300 series, S7-400 series, s7-1200 series, s7-1500 series, Siemens disassembly PLC module, Siemens CPU controller processor, man-machine interface touch screen, Siemens frequency converter, PLC memory card, Siemens Servo, Siemens DC governor, Siemens acquisition cardAB Rockwell series: PLC, recovery and disassembly, Rockwell CPU controller processor, man-machine interface, AB touch screen, AB frequency converter, AB memory cardSchneider Schneider series: Schneider PLC module (140 series. TSX series. BMX Series), Schneider touch screen, Schneider Frequency ConverterMitsubishi series: Mitsubishi PLC, Mitsubishi servo driver, Mitsubishi servo motor, Mitsubishi q series L series module, Mitsubishi fx2n.fx3u.fx3ga.fx5u series module, Mitsubishi touch screen, Mitsubishi frequency converter D700, d750 series, etcOmron Omron series: OMRON PLC module CJ and CP series, Omron CPU module, Omron touch screen, Omron thermostat e5ec.e5cc series, Omron sensor, Omron microswitch / photoelectric switch / proximity switch, Omron counter, Omron time relay, etcXinje Xinjie series: Xinjie PLC, Xinjie touch screen, Xinjie servo driver, Xinjie servo motorKEYENCE Kearns series: Kearns sensor, Kearns photoelectric switch, Kearns proximity switch, Kearns vision system, Kearns CCD camera, lens, Kearns optical drill amplifier, Kearns grating, Kearns PLC, etcCognex Cognex: Cognex smart camera / CCD industrial camera, Cognex lens, Cognex vision system, Cognex coder reader, Cognex scanning code Q scanner, Cognex dongle, Cognex acquisition cardRecycling various brands (man-machine interface): weiluntong touch screen, plofis touch screen, Kunlun Tongtai touch screen, Siemens touch screen, AB touch screen, Mitsubishi touch screenAnother large amount of recycling: Recycling ABB frequency converter / ABB Robot teaching pendant, recycling FANUC servo / FANUC robot teaching pendant, recycling Yaskawa servo / Yaskawa robot teaching pendant, recycling yifumen sensor / proximity switch, recycling Xike Sike sensor / Sike photoelectric switch, recycling Pilz Pilz safety relay / Pilz controller, recycling Phoenix Contact safety relay, Recover Weidmuller intermediate relay / Weidmuller module, recover Hollysys card / Hollysys module K-series, recover MW Mingwei Mingwei switching power supply, recover SMC cylinder air Claw / magnetic switch / throttle valve, recover FESTO cylinder / magnetic switch ymf

High price recycling in all regions of the country: (13255216919 synchronous V-letter) brand new / unlimited disassembly, unlimited models.The brands and models acquired are:Delta series: Delta PLC module, delta touch screen, delta frequency converter, delta temperature controller, delta A2 servo / delta B2 servo 200W 400W 750WPanasonic series: Panasonic servo driver, Panasonic servo motor, Panasonic sensor, Panasonic PLC moduleSiemens series: S7-200 series, S7-300 series, S7-400 series, s7-1200 series, s7-1500 series, Siemens disassembly PLC module, Siemens CPU controller processor, man-machine interface touch screen, Siemens frequency converter, PLC memory card, Siemens Servo, Siemens DC governor, Siemens acquisition cardAB Rockwell series: PLC, recovery and disassembly, Rockwell CPU controller processor, man-machine interface, AB touch screen, AB frequency converter, AB memory cardSchneider Schneider series: Schneider PLC module (140 series. TSX series. BMX Series), Schneider touch screen, Schneider Frequency ConverterMitsubishi series: Mitsubishi PLC, Mitsubishi servo driver, Mitsubishi servo motor, Mitsubishi q series L series module, Mitsubishi fx2n.fx3u.fx3ga.fx5u series module, Mitsubishi touch screen, Mitsubishi frequency converter D700, d750 series, etcOmron Omron series: OMRON PLC module CJ and CP series, Omron CPU module, Omron touch screen, Omron thermostat e5ec.e5cc series, Omron sensor, Omron microswitch / photoelectric switch / proximity switch, Omron counter, Omron time relay, etcXinje Xinjie series: Xinjie PLC, Xinjie touch screen, Xinjie servo driver, Xinjie servo motorKEYENCE Kearns series: Kearns sensor, Kearns photoelectric switch, Kearns proximity switch, Kearns vision system, Kearns CCD camera, lens, Kearns optical drill amplifier, Kearns grating, Kearns PLC, etcCognex Cognex: Cognex smart camera / CCD industrial camera, Cognex lens, Cognex vision system, Cognex coder reader, Cognex scanning code Q scanner, Cognex dongle, Cognex acquisition cardRecycling various brands (man-machine interface): weiluntong touch screen, plofis touch screen, Kunlun Tongtai touch screen, Siemens touch screen, AB touch screen, Mitsubishi touch screenAnother large amount of recycling: Recycling ABB frequency converter / ABB Robot teaching pendant, recycling FANUC servo / FANUC robot teaching pendant, recycling Yaskawa servo / Yaskawa robot teaching pendant, recycling yifumen sensor / proximity switch, recycling Xike Sike sensor / Sike photoelectric switch, recycling Pilz Pilz safety relay / Pilz controller, recycling Phoenix Contact safety relay, Recover Weidmuller intermediate relay / Weidmuller module, recover Hollysys card / Hollysys module K-series, recover MW Mingwei Mingwei switching power supply, recover SMC cylinder air Claw / magnetic switch / throttle valve, recover FESTO cylinder / magnetic switch ymf

High price recycling in all regions of the country: (13255216919 synchronous V-letter) brand new / unlimited disassembly, unlimited models.The brands and models acquired are:Delta series: Delta PLC module, delta touch screen, delta frequency converter, delta temperature controller, delta A2 servo / delta B2 servo 200W 400W 750WPanasonic series: Panasonic servo driver, Panasonic servo motor, Panasonic sensor, Panasonic PLC moduleSiemens series: S7-200 series, S7-300 series, S7-400 series, s7-1200 series, s7-1500 series, Siemens disassembly PLC module, Siemens CPU controller processor, man-machine interface touch screen, Siemens frequency converter, PLC memory card, Siemens Servo, Siemens DC governor, Siemens acquisition cardAB Rockwell series: PLC, recovery and disassembly, Rockwell CPU controller processor, man-machine interface, AB touch screen, AB frequency converter, AB memory cardSchneider Schneider series: Schneider PLC module (140 series. TSX series. BMX Series), Schneider touch screen, Schneider Frequency ConverterMitsubishi series: Mitsubishi PLC, Mitsubishi servo driver, Mitsubishi servo motor, Mitsubishi q series L series module, Mitsubishi fx2n.fx3u.fx3ga.fx5u series module, Mitsubishi touch screen, Mitsubishi frequency converter D700, d750 series, etcOmron Omron series: OMRON PLC module CJ and CP series, Omron CPU module, Omron touch screen, Omron thermostat e5ec.e5cc series, Omron sensor, Omron microswitch / photoelectric switch / proximity switch, Omron counter, Omron time relay, etcXinje Xinjie series: Xinjie PLC, Xinjie touch screen, Xinjie servo driver, Xinjie servo motorKEYENCE Kearns series: Kearns sensor, Kearns photoelectric switch, Kearns proximity switch, Kearns vision system, Kearns CCD camera, lens, Kearns optical drill amplifier, Kearns grating, Kearns PLC, etcCognex Cognex: Cognex smart camera / CCD industrial camera, Cognex lens, Cognex vision system, Cognex coder reader, Cognex scanning code Q scanner, Cognex dongle, Cognex acquisition cardRecycling various brands (man-machine interface): weiluntong touch screen, plofis touch screen, Kunlun Tongtai touch screen, Siemens touch screen, AB touch screen, Mitsubishi touch screenAnother large amount of recycling: Recycling ABB frequency converter / ABB Robot teaching pendant, recycling FANUC servo / FANUC robot teaching pendant, recycling Yaskawa servo / Yaskawa robot teaching pendant, recycling yifumen sensor / proximity switch, recycling Xike Sike sensor / Sike photoelectric switch, recycling Pilz Pilz safety relay / Pilz controller, recycling Phoenix Contact safety relay, Recover Weidmuller intermediate relay / Weidmuller module, recover Hollysys card / Hollysys module K-series, recover MW Mingwei Mingwei switching power supply, recover SMC cylinder air Claw / magnetic switch / throttle valve, recover FESTO cylinder / magnetic switch ymf

High price recycling in all regions of the country: (13255216919 synchronous V-letter) brand new / unlimited disassembly, unlimited models.The brands and models acquired are:Delta series: Delta PLC module, delta touch screen, delta frequency converter, delta temperature controller, delta A2 servo / delta B2 servo 200W 400W 750WPanasonic series: Panasonic servo driver, Panasonic servo motor, Panasonic sensor, Panasonic PLC moduleSiemens series: S7-200 series, S7-300 series, S7-400 series, s7-1200 series, s7-1500 series, Siemens disassembly PLC module, Siemens CPU controller processor, man-machine interface touch screen, Siemens frequency converter, PLC memory card, Siemens Servo, Siemens DC governor, Siemens acquisition cardAB Rockwell series: PLC, recovery and disassembly, Rockwell CPU controller processor, man-machine interface, AB touch screen, AB frequency converter, AB memory cardSchneider Schneider series: Schneider PLC module (140 series. TSX series. BMX Series), Schneider touch screen, Schneider Frequency ConverterMitsubishi series: Mitsubishi PLC, Mitsubishi servo driver, Mitsubishi servo motor, Mitsubishi q series L series module, Mitsubishi fx2n.fx3u.fx3ga.fx5u series module, Mitsubishi touch screen, Mitsubishi frequency converter D700, d750 series, etcOmron Omron series: OMRON PLC module CJ and CP series, Omron CPU module, Omron touch screen, Omron thermostat e5ec.e5cc series, Omron sensor, Omron microswitch / photoelectric switch / proximity switch, Omron counter, Omron time relay, etcXinje Xinjie series: Xinjie PLC, Xinjie touch screen, Xinjie servo driver, Xinjie servo motorKEYENCE Kearns series: Kearns sensor, Kearns photoelectric switch, Kearns proximity switch, Kearns vision system, Kearns CCD camera, lens, Kearns optical drill amplifier, Kearns grating, Kearns PLC, etcCognex Cognex: Cognex smart camera / CCD industrial camera, Cognex lens, Cognex vision system, Cognex coder reader, Cognex scanning code Q scanner, Cognex dongle, Cognex acquisition cardRecycling various brands (man-machine interface): weiluntong touch screen, plofis touch screen, Kunlun Tongtai touch screen, Siemens touch screen, AB touch screen, Mitsubishi touch screenAnother large amount of recycling: Recycling ABB frequency converter / ABB Robot teaching pendant, recycling FANUC servo / FANUC robot teaching pendant, recycling Yaskawa servo / Yaskawa robot teaching pendant, recycling yifumen sensor / proximity switch, recycling Xike Sike sensor / Sike photoelectric switch, recycling Pilz Pilz safety relay / Pilz controller, recycling Phoenix Contact safety relay, Recover Weidmuller intermediate relay / Weidmuller module, recover Hollysys card / Hollysys module K-series, recover MW Mingwei Mingwei switching power supply, recover SMC cylinder air Claw / magnetic switch / throttle valve, recover FESTO cylinder / magnetic switch ymf

Working principle of surface acoustic wave touch screenTaking the x-axis transmitting transducer at the following angle as an example, the transmitting transducer converts the electrical signal sent by the controller through the touch screen cable into acoustic energy and transmits it to the left surface, and then a group of precision reflection stripes under the glass plate reflect the acoustic energy into an upward uniform surface for transmission, and the acoustic energy passes through the screen surface, Then, the reflected fringes on the upper side gather into sound waves propagating to the right and give them to the x-axis receiving transducer, which changes the returned surface acoustic wave energy into an electrical signal.When the transmitting transducer emits a narrow pulse, the acoustic energy reaches the receiving transducer through different ways, the earliest on the right and the latest on the left. The early and late acoustic energy are superimposed into a wide waveform signal. It is not difficult to see that the received signal gathers all the acoustic energy returning through different long and short paths in the axis direction. They travel the same distance on the y-axis, but on the x-axis, the farthest one travels twice the maximum distance on the x-axis than the nearest one. Therefore, the time axis of this waveform signal reflects the position before the superposition of each original waveform, that is, the x-axis coordinate.When there is no touch, the waveform of the received signal is exactly the same as the reference waveform. When a finger or other object that can absorb or block the acoustic energy touches the screen, the acoustic energy walking upward through the finger on the x-axis is partially absorbed and reflected on the received waveform, that is, there is an attenuation gap in the waveform at a certain time. The received waveform attenuates a notch corresponding to the signal of the finger blocking part. The controller analyzes the attenuation of the received signal and determines the X coordinate from the position of the notch. Then, the Y coordinate of the touch point is determined in the same process of the f axis. In addition to the X and Y coordinates that the general touch screen can respond to, the surface acoustic wave touch screen also responds to the third axis Z axis coordinates, that is, it can sense the user's touch pressure. Its principle is calculated from the attenuation at the attenuation of the received signal. Once the three axes are determined, the controller transmits them to the main engine.The controller detects touch by comparing the received signal with the reference waveform in the non touch condition. This process allows the controller to ignore impurities such as dust and scratches. The controller continuously detects and eliminates impurities and pollution factors. When a "touch" remains unchanged for about 3 seconds, the controller will determine and eliminate impurity factors.In this case, a new reference waveform is required to effectively ignore impurities and restore the normal operation of the touch screen. If the impurities are removed, the controller will repeat the new reference waveform requirement procedure again.Technical principle of surface acoustic wave touch screenIt is designed by using the characteristics of. Taking the x-axis as an example, the control circuit generates a transmission signal (electrical signal), which is converted into ultrasonic vibration in the thickness direction by the x-axis transmission transducer on the glass screen, and the ultrasonic wave is refracted by the wedge seat under the transducer to generate components propagating along the glass surface. When the ultrasonic wave encounters the 45 degree inclined reflection ray on the way forward, it generates a component 90 degrees with the incident wave and parallel to the y-axis. The component is transmitted to the other side of the x-direction of the glass screen, and also encounters the 45 degree inclined reflection ray. After reflection, it is transmitted to the x-axis receiving transducer in the direction opposite to the emission direction. The x-axis receiving transducer converts the recovered sound wave into an electrical signal. The control circuit processes the electrical signal to obtain the waveform representing the acoustic energy distribution of the glass screen. When there is touch, the finger will absorb part of the acoustic energy, and the recovered signal will attenuate. The program can analyze the attenuation to determine the coordinates of the touch point in the X direction. Similarly, the coordinates in the y-axis direction can be determined. As soon as the coordinates in the X and Y directions are determined, the touch point will be uniquely determined.The subtlety of the acoustic screen design is that only a pair of transducers in each direction can detect the whole touch surface, and the height is high; Unlike the infrared touch screen, at least dozens of transmitting / receiving tube pairs are required in each direction. With the increase of screen size or resolution, the number of transmitting / receiving tube pairs needs to be increased proportionally. The key to its implementation is the reflection array. The precise and accurate spacing distribution of the reflection array ensures the consistency of the recovered signal.Since the signal attenuation is directly related to the finger touch force, the acoustic screen can also respond to the z-axis coordinate, that is, the touch force, which becomes very useful and interesting in some cases.Surface acoustic wave touch screen features(1) Surface acoustic wave touch screen is a high durability structure, anti scratch and anti violence. Because the working surface of the surface acoustic wave touch screen is a layer of invisible and unbreakable acoustic energy, the base glass of the touch screen does not have any interlayer and structural stress (the surface acoustic wave touch screen can be developed to be directly made on the CRT surface without any "screen"). Therefore, it is very anti violent and suitable for use in public places.(2) Clear and beautiful. Because the structure is few, there is only one layer of ordinary glass, and the transmittance and clarity are much better than those of capacitive and resistive touch screens.(3) Fast response. It is the fastest of all touch screens and feels very smooth when used.(4) Stable performance. Because the principle of surface acoustic wave technology is stable, and the controller of surface acoustic wave touch screen calculates the touch position by measuring the position on the time axis at the attenuation time, the surface acoustic wave touch screen is very stable and the accuracy is very high. At present, the accuracy of surface acoustic wave technology touch screen is usually 4096x4096x256.(5) The disadvantage of the surface acoustic wave touch screen is that the dust and water droplets on the surface of the touch screen also block the transmission of the surface acoustic wave. Although the smart control card can distinguish it, when the dust accumulates to a certain extent, the signal attenuates very badly. At this time, the surface acoustic wave touch screen becomes dull or even does not work. Therefore, on the one hand, the surface acoustic wave touch screen introduces the dust-proof touch screen, and on the other hand, it is recommended to clean the touch screen regularly every year.(6) The touch screen can be activated with fingers, gloved fingers or soft substances that can absorb the energy of sound waves. If a beverage bottle is placed on the flat acoustic touch screen, the system does not take the bottle as a touch, but continues to recognize the touch signal activated by the finger. This is not possible for resistive and capacitive touch screens.(7) The surface acoustic wave touch screen can accurately know what dust and water droplets are, what fingers are and how many are touching. Because our fingers touch with the precision of 4096x4096x256, the touch data of 65 times per second cannot be the same, while the dust or water droplets remain the same at all. When the controller finds that a "touch" occurs, the silk remains unchanged for more than 3 seconds, and it is automatically recognized as an interference.(8) The surface acoustic wave touch screen also has a third axis (Z axis), that is, the pressure axis response. This is because the greater the user's power to touch the screen, the wider and deeper the attenuation gap on the received signal waveform. At present, among all touch screens, only acoustic touch screen has the performance of sensing touch pressure. With this function, each touch point is not just two simple states with and without touch, but a switch of analog value that can sense power. This function is very useful. For example, in multimedia information query software, one button can control the playback speed, color brightness and volume of animation or images.(comprehensive arrangement: Tonghao technology and Baidu know)

Working principle of surface acoustic wave touch screenTaking the x-axis transmitting transducer at the following angle as an example, the transmitting transducer converts the electrical signal sent by the controller through the touch screen cable into acoustic energy and transmits it to the left surface, and then a group of precision reflection stripes under the glass plate reflect the acoustic energy into an upward uniform surface for transmission, and the acoustic energy passes through the screen surface, Then, the reflected fringes on the upper side gather into sound waves propagating to the right and give them to the x-axis receiving transducer, which changes the returned surface acoustic wave energy into an electrical signal.When the transmitting transducer emits a narrow pulse, the acoustic energy reaches the receiving transducer through different ways, the earliest on the right and the latest on the left. The early and late acoustic energy are superimposed into a wide waveform signal. It is not difficult to see that the received signal gathers all the acoustic energy returning through different long and short paths in the axis direction. They travel the same distance on the y-axis, but on the x-axis, the farthest one travels twice the maximum distance on the x-axis than the nearest one. Therefore, the time axis of this waveform signal reflects the position before the superposition of each original waveform, that is, the x-axis coordinate.When there is no touch, the waveform of the received signal is exactly the same as the reference waveform. When a finger or other object that can absorb or block the acoustic energy touches the screen, the acoustic energy walking upward through the finger on the x-axis is partially absorbed and reflected on the received waveform, that is, there is an attenuation gap in the waveform at a certain time. The received waveform attenuates a notch corresponding to the signal of the finger blocking part. The controller analyzes the attenuation of the received signal and determines the X coordinate from the position of the notch. Then, the Y coordinate of the touch point is determined in the same process of the f axis. In addition to the X and Y coordinates that the general touch screen can respond to, the surface acoustic wave touch screen also responds to the third axis Z axis coordinates, that is, it can sense the user's touch pressure. Its principle is calculated from the attenuation at the attenuation of the received signal. Once the three axes are determined, the controller transmits them to the main engine.The controller detects touch by comparing the received signal with the reference waveform in the non touch condition. This process allows the controller to ignore impurities such as dust and scratches. The controller continuously detects and eliminates impurities and pollution factors. When a "touch" remains unchanged for about 3 seconds, the controller will determine and eliminate impurity factors.In this case, a new reference waveform is required to effectively ignore impurities and restore the normal operation of the touch screen. If the impurities are removed, the controller will repeat the new reference waveform requirement procedure again.Technical principle of surface acoustic wave touch screenIt is designed by using the characteristics of. Taking the x-axis as an example, the control circuit generates a transmission signal (electrical signal), which is converted into ultrasonic vibration in the thickness direction by the x-axis transmission transducer on the glass screen, and the ultrasonic wave is refracted by the wedge seat under the transducer to generate components propagating along the glass surface. When the ultrasonic wave encounters the 45 degree inclined reflection ray on the way forward, it generates a component 90 degrees with the incident wave and parallel to the y-axis. The component is transmitted to the other side of the x-direction of the glass screen, and also encounters the 45 degree inclined reflection ray. After reflection, it is transmitted to the x-axis receiving transducer in the direction opposite to the emission direction. The x-axis receiving transducer converts the recovered sound wave into an electrical signal. The control circuit processes the electrical signal to obtain the waveform representing the acoustic energy distribution of the glass screen. When there is touch, the finger will absorb part of the acoustic energy, and the recovered signal will attenuate. The program can analyze the attenuation to determine the coordinates of the touch point in the X direction. Similarly, the coordinates in the y-axis direction can be determined. As soon as the coordinates in the X and Y directions are determined, the touch point will be uniquely determined.The subtlety of the acoustic screen design is that only a pair of transducers in each direction can detect the whole touch surface, and the height is high; Unlike the infrared touch screen, at least dozens of transmitting / receiving tube pairs are required in each direction. With the increase of screen size or resolution, the number of transmitting / receiving tube pairs needs to be increased proportionally. The key to its implementation is the reflection array. The precise and accurate spacing distribution of the reflection array ensures the consistency of the recovered signal.Since the signal attenuation is directly related to the finger touch force, the acoustic screen can also respond to the z-axis coordinate, that is, the touch force, which becomes very useful and interesting in some cases.Surface acoustic wave touch screen features(1) Surface acoustic wave touch screen is a high durability structure, anti scratch and anti violence. Because the working surface of the surface acoustic wave touch screen is a layer of invisible and unbreakable acoustic energy, the base glass of the touch screen does not have any interlayer and structural stress (the surface acoustic wave touch screen can be developed to be directly made on the CRT surface without any "screen"). Therefore, it is very anti violent and suitable for use in public places.(2) Clear and beautiful. Because the structure is few, there is only one layer of ordinary glass, and the transmittance and clarity are much better than those of capacitive and resistive touch screens.(3) Fast response. It is the fastest of all touch screens and feels very smooth when used.(4) Stable performance. Because the principle of surface acoustic wave technology is stable, and the controller of surface acoustic wave touch screen calculates the touch position by measuring the position on the time axis at the attenuation time, the surface acoustic wave touch screen is very stable and the accuracy is very high. At present, the accuracy of surface acoustic wave technology touch screen is usually 4096x4096x256.(5) The disadvantage of the surface acoustic wave touch screen is that the dust and water droplets on the surface of the touch screen also block the transmission of the surface acoustic wave. Although the smart control card can distinguish it, when the dust accumulates to a certain extent, the signal attenuates very badly. At this time, the surface acoustic wave touch screen becomes dull or even does not work. Therefore, on the one hand, the surface acoustic wave touch screen introduces the dust-proof touch screen, and on the other hand, it is recommended to clean the touch screen regularly every year.(6) The touch screen can be activated with fingers, gloved fingers or soft substances that can absorb the energy of sound waves. If a beverage bottle is placed on the flat acoustic touch screen, the system does not take the bottle as a touch, but continues to recognize the touch signal activated by the finger. This is not possible for resistive and capacitive touch screens.(7) The surface acoustic wave touch screen can accurately know what dust and water droplets are, what fingers are and how many are touching. Because our fingers touch with the precision of 4096x4096x256, the touch data of 65 times per second cannot be the same, while the dust or water droplets remain the same at all. When the controller finds that a "touch" occurs, the silk remains unchanged for more than 3 seconds, and it is automatically recognized as an interference.(8) The surface acoustic wave touch screen also has a third axis (Z axis), that is, the pressure axis response. This is because the greater the user's power to touch the screen, the wider and deeper the attenuation gap on the received signal waveform. At present, among all touch screens, only acoustic touch screen has the performance of sensing touch pressure. With this function, each touch point is not just two simple states with and without touch, but a switch of analog value that can sense power. This function is very useful. For example, in multimedia information query software, one button can control the playback speed, color brightness and volume of animation or images.(comprehensive arrangement: Tonghao technology and Baidu know)