What Type of Screen Protector Should I Get?

Overvoltage Protection Circuit Technology of DC-DC Converter for Spacecraft

Overvoltage protection circuit technology of DC-DC converter for spacecraftIn the design of DC-DC converter, the protection of electric load and the protection of DC-DC converter due to the failure of electric load should be considered. Due to the special requirements of high reliability and non maintainability of DC-DC converter for spacecraft, failure mode and impact analysis should be carried out at the beginning of design, that is, considering the impact of various faults that may occur in all components and components of DC-DC converter on DC-DC converter, as well as corresponding corrective measures in design, so as to ensure that it will not cause disastrous consequences.The stability requirements of electronic circuit loads on the power supply are generally not more than 1% of the power supply voltage and not more than 5% in extreme cases. The stability requirements of electromechanical loads on the power supply are relatively wide. In order to ensure the safe and reliable operation of electrical equipment, overvoltage protection circuit should be designed according to various failure modes of components and line elements in the circuit. Irrelevant double faults are not considered in the analysis of overvoltage failure mode, that is, it is considered that the simultaneous failure of different components of two unrelated circuits is a minimum probability event.Failure mode analysis of overvoltage of secondary power supplyDC-DC converter is a closed-loop feedback system. The fault points of output overvoltage caused by different circuit topologies are different. For example, for a non isolated buck converter, once the drain source of the series power MOSFET is short circuited, the input voltage will be directly connected to the output. For another example, the multi-channel output DC-DC converter using magnetic isolation sampling and output secondary voltage stabilization, and the input and output short circuit of the three terminal voltage regulator used for secondary voltage stabilization will also lead to output overvoltage. For another example, for a multi-channel output DC-DC converter, the difference in cross adjustment rate will increase the output voltage of a certain channel.For general single output isolated DC-DC converters, the failure modes that may cause output overvoltage are shown in Table 1. Design of general overvoltage protection circuitGenerally, the overvoltage protection at the output end can be realized by forced method, that is, overvoltage clamping and fast breaking. For example, the clamping output is realized by parallel connection of Zener diode or thyristor at the output end. See Figures 1 and 2.In addition to the fault mode of output overvoltage caused by transformer primary stage short circuit can be overcome by transformer insulation design, for the other overvoltage failure modes listed in Table 1, an output voltage limiting protection circuit based on PWM is designed in this paper.Output voltage limiting protection circuit based on PWM

The Demand for LED Protection Components Is Expected to Increase Greatly in the next Few Years

Triode Manufacturer: Introduction to Shanghai Guangyurui Core Microelectronics Co., Ltd

Company name: Shanghai guangyuruixin Microelectronics Co., LtdEnglish Name: Shanghai Sino IC Microelectronics Co., LtdRegion: ShanghaiManufacturer type: Design Manufacturercompany website: http://www.sino-ic.netData provided by: Shanghai IC Industry AssociationCompany profileShanghai guangyuruixin Microelectronics Co., Ltd., located in Zhangjiang High Tech Park, Pudong, Shanghai, is a high-tech enterprise specializing in the design and sales of semiconductor overvoltage protection devices and integrated circuits. It is one of the domestic suppliers who master the core technology of semiconductor overvoltage protection devices and integrated circuit design. The company's main products include: interface protection of communication system, interface protection of portable products, overcharge and discharge protection of lithium battery, overvoltage protection of power supply system and led overvoltage protection devices; And regulators, power MOSFET devices, Schottky devices and led driving circuits.Benefiting from the rapid development of China's electronic information industry, the company consistently focuses on the improvement of technology, team construction, improvement of management, market development and innovation of operation mode. The company has achieved initial success in China's Microelectronic Design Industry; It has become the main design unit of semiconductor overvoltage protection devices in China. Its product quality, product specification and cost performance are leading in the industry, and has successfully developed a number of substitutes for similar foreign products.Adhering to the development concept of "people-oriented", the company strives to create a good working environment and first-class infrastructure for employees. At present, the company has gathered a high-quality talent team with doctors and masters as the main body, and its technical level and R & D scale are among the best in domestic peers.Ruixin microelectronics is based on the concept of customer first, coexistence and common prosperity with suppliers, each employee is a responsibility unit, and the company is a team; We are willing to sincerely cooperate with colleagues in the industry and customers from all walks of life, face opportunities, meet challenges and create the future with information technology.Company productsPower management chipOther chipsprotection circuit logical circuitElectronic componentsdiodetriodeField effect transistor

Dont Waste Money on a Phone Screen Protector

My phone is an Apple iPhone 11. Its a beautiful phone and a major upgrade from the iPhone SE that was in my pocket for three years. The only issue I have is that I am still not accustomed to the larger size, and that has caused me to drop my phone far more often than any other phone I have owned.Well, thats not entirely true. Years ago I had Nokia 1610. I was walking in Boston on my way to a client. I was also expecting a phone call from another client concerning a potentially very profitable job. When my phone rang, I yanked it out of my jacket pocket, lost my grip, and sent the still ringing phone bouncing down Boylston Street. I chased after it and kicked it, sending it skidding down the sidewalk again. I wish I had a video of that; it would do very well on YouTube.I also managed to throw that phone across several parking lots getting out of my car while fumbling for it in my pocket. It was a tough phone, though, and never broke.I think I dropped the SE four times if my memory is correct. It didnt break. I suspect the toughness was more due to its lighter weight than anything else, but it was gratifying to pick it up from the sidewalk and find nothing wrong.The brand new iPhone 11 fell from my hands when I took it out of its box, before I even turned it on. It hit a table first, bounced to a chair, and then landed face down on the floor. It was torque that fooled me: I was used to grabbing my SE toward its bottom. The SE is very light: there isnt much weight to pull it. Not so with the iPhone 11, it rotated and wrenched right out of my fingers. I made a vow to always grasp in the middle from then on, but that message never fully reached my fingers, so I continued to fumble the phone often.It doesnt fit my pocket as well as the smaller SE. I have dropped it several times while meaning to put it into my pants or jacket, and it frequently falls out of my coat when I get in my car.The most recent fall was while weighing myself on our smart scale. I should not care a bit about the extra seven ounces or so that the phone and its case would add to the scale, but I foolishly tried to put it down on a nearby table. I misjudged, and the phone fell edge first on to the glass scale. The impact noise was loud enough that I expected to find the scale, the phone, or both shattered, but neither was damaged.That lack of damage surprised me. Apple does advertise the iPhone 11 models as having the toughest glass in a smartphone, but thats advertising, and there is always puffery involved.Thats why people put on screen protectors, right? I had a screen protector on my iPhone 11, and the protector did crack, but when I took it off, the phone itself was undamaged. The odd thing was that it shouldnt have been pristine. It should have already had a scratch on it but it did not.Waking Up is Hard To DoMy new iPhone 11 had spent its first night with me on my bedroom side table. The battery life on these phones is incredible, so I didnt bother to charge it. When the alarm went off the next morning, I reached for the phone and sent it flying off the table to skid across our hardwood floor and bury itself in the opposite corner of the room. I was off to a great start.I groaned, got out of bed, and walked to pick it up. Disgusted, I saw that the screen was scratched. Later that day, I bought a glass screen protector and installed it. I never had a screen protector on my SE, and it never broke or scratched, so if the 11s glass is even stronger, why did this happen?I had a theory: one way to make the glass less likely to break is to soften it. Softer glass wont shatter as easily, but perhaps it would be easier to scratch? I didnt know, but I put the protector on; better safe than sorry.Cell phone glass will not scratch easily. When I worked at an Apple store, Id shock customers by attacking my SEs screen with my keys. They never made a mark, but that slide across my bedroom store convinced me not to try the key test with my new iPhone.Sand will scratch the screen because sand can contain tiny little diamonds and other hard minerals. If youll be carrying sand with your phone, you might want a screen protector. You may also want a privacy shield version if you want to keep what you are looking at safe from nearby eyes. A hammer will break your phone no matter what, but a good case is the best protection of all.My SE did have micro scratches. You could see them only with the screen off and in the right light. If those would bother you, get a screen film. Id always suggest the less expensive soft plastic versions, because they dont crack and protect from scratches just as well as glass. Admittedly, it doesnt look as nice.Yet after the drop onto the scale and the removal of the screen protector, I could see no scratches. Puzzled, I took out my keys and very cautiously tried to scratch my phone. Nothing. I pushed harder. Still nothing.I could not scratch the screen with my keys, and where the heck was the scratch from that early morning skidding adventure?One possible explanation is that it was never there. The floor didnt scuff the phone, the phone scuffed the floor, and that looked like a scratch to me. When I cleaned it to apply the screen protector, I probably washed that away and didnt notice it because I was concentrating on getting the screen protector on correctly.The only other explanation would be self-healing glass. If Apple had that, theyd be shouting it from rooftops!But It Protected the Phone!Wed get people every day at the Apple store who needed to replace broken screen protectors. They were quite proud that the protector had broken because it saved my phone!Id always demur. That protector is fragile glass. The idea that it can crack and distribute impact force to save the phone might be accurate under particular circumstances, but I knew that I had dropped my unprotected SE many times, and it did not break. Phone glass is tough. If you drop it hard enough, you can break it with or without a screen protector. The customers would sometimes protest.Sure. If the screen protector breaks, some makers will give you a free replacement. Thats what the guarantee usually is; they are not going to pay for your phone repair if you manage to break both the phone and the protector. Zag is an exception: they will pay up to $100 to fix a screen if protected by their most expensive screen protector. As that protector is a $79 expense for a piece of glass that probably costs a few cents, I think they can afford that, but it wont help you much.Do you know what it would cost to fix a broken iPhone 11 screen? With insurance from Apple or anyone else, thats usually about $30. Without insurance, its $200 for the front glass and $400 for the back. Oh, and dont waste your money on a cheap repair at a Mall kiosk. Most of those people end up at an Apple or Best Buy store a week later because the screen doesnt work right after the cheap repair.Reality Check: What Does, and Doesn't, Protect Your SmartphoneTech Fix So here's a reality check on what does and doesn't protect your phone. To reach our conclusions, we interviewedwww.nytimes.comMy advice is to skip the screen protector and buy the insurance. I pay $7.99 a month for AppleCare on my iPhone 11. Because I pay it through my iTunes account and have filled that with Apple gift cards bought at a discount, I actually spend less, and I can keep that insurance in effect until Apple doesnt have the parts to fix it. Im sure Ill be upgrading to a new phone before that happens.But if it makes you feel better to have a screen protector, do that. I didnt replace mine, and I have no plans to do soHow do you repair cell phone screens?How you repair cell phone screens very much varies based on the type of phone you are trying to repair and so I really cant answer for all types of phones.What I can do is show you where to find out for each device: The Free Repair ManualThere you will find step by step guides for many devices, lists of parts and tools required, difficulty involved, and other peoples feedback on the repair method.What I can give you here, are some tips when repairing phone screens:Avoid replacing the LCD if you can avoid it - You cant always avoid it, but some models of phone have a separate LCD and digitizer (i.e. front glass). Replacing just the digitizer is far cheaper than replacing both, but if you need to replace bothBuy the LCD and digitizer factory fused - UV curing LOCA (Liquid, Optically-Clear Adhesive) is very difficult to get perfect. Save yourself the time and hassle by getting it already done from the factory.Use duct tape to prevent the old screen shattering when removing itExpect to pay a LOT more for Android screensIf you have any uncertainty, DONT. DO. It. - Im really serious here. I only do repairs on devices that I have actually bought myself and practiced the repair on.Look for the best rated sellers, not always the cheapest - I have had no bad experiences with iPhone screens imported from AliExpress, but nevertheless I always look for sellers with 1) lots of sales of the item and 2) good feedback on the item. Android screens sometimes come with defects - discoloration, burned images, buttons that dont respond well etc.If you have any further queries, or would like assistance with a specific device, feel free to contact me and Ill do my best to help you.

Introduction to Dfroboti2c Oled-2864 Display

brief introductionOLED is also called organic light emitting diode. Compared with traditional LCD, OLED has the advantages of faster response speed and lighter volume. The screen thickness can be less than 1mm, which is only about 1 / 3 of LCD screen. It has lower power consumption and good seismic resistance, and can be widely used in the display application of mobile devices. With some mini Arduino main controllers, such as beetle, Curie nano and other small boards, you can make an intelligent wearable device with display function.Gravity oled-2864 display is a self luminous display module without background light source. The module adopts blue background, the display size is controlled at 0.96 inch, and is controlled by OLED special driver chip ssd1306. The module supports communication with the controller through I2C interface, supports high transmission rate, and can achieve a refresh frequency of 60Hz. The module adopts gravity I2C universal interface, which can be directly inserted into the Arduino main controller without additional DuPont line, so as to get rid of the trouble of complicated wiring. In addition, the display screen adopts aluminum alloy outer frame packaging, which can not only protect the screen from damage, but also prevent you from being scratched by the glass edge of the screen during use.Arduino lis2dh oled12864 electronic clockcharacteristicSupport gravity-i2c interface, plug and playThe screen is covered with a metal protective frame4 x m3 screw holes are provided for easy fixing and installationSupport Arduino 101 mastertechnical specificationsWorking voltage: 3.3V 5VDisplay color: BlueNumber of pixels: 128 columns 64 linesInterface mode: gravity-i2cScreen swiping rate: 60 frames / secondBrightness: 60 (typ) CD / m2Full screen lighting power consumption: about 22.75maDisplay area: 21.744 10.864 (mm)Mounting hole size: 35 x 20 (mm)Module weight: 15g

Design of Integrated EMI Filtering and ESD Protection Scheme Based on Portable Equipment

Today's mobile phones and other portable devices are becoming smaller and thinner. At the same time, they are integrating more and more new functions or features, such as large-size display screen, high-resolution camera module, high-speed data interface, Internet access, TV reception, etc., making the data rate and clock frequency of portable devices higher and higher. In this way, portable devices are faced with many potential electromagnetic interference (EMI) / radio frequency interference (RFI) sources, such as switching load, power supply voltage fluctuation, short circuit, inductive switch, lightning, switching power supply, RF amplifier and power amplifier, interconnection between ribbon cable and video display screen, high-frequency noise of clock signal, etc. Therefore, designers need to select a suitable EMI / RFI filtering scheme for portable devices according to multiple locations such as audio jack / headset, USB port, speaker, keyboard, microphone, camera and display interconnection.For EMI / RFI filters, from the perspective of architecture, the most common architecture is "Pi" filter. As the name suggests, this architecture is similar to the Greek letter "". There are two common type filters: c-r-c (capacitance resistance capacitance) filter and c-l-c (capacitance inductance capacitance) filter. Among them, c-r-c filter (see Figure 1a) is also known as RC - filter or RC filter, which is used for audio and low-speed data filtering applications; C-l-c filter (see Fig. 1b) is also called LC - filter or LC filter, which is used for audio, low-speed and high-speed data filtering applications. filter also has an expansion type, that is, ladder shaped filter. The most common is LC (inductance capacitance) ladder filter (see Fig. 1c). This filter bears higher data rate, but when the filter elements (inductance or capacitance) increase, the size and cost will become a problem, resulting in higher material cost and larger packaging.Figure 1: structural diagram of common EMI / RFI filter types: a) type RC; b) type LC; c) LC ladder.Among these types of EMI / RFI filters, from the comparison of frequency amplitude response, type RC filter has the widest transition band and the lowest rolloff; - type LC filter has low turning rate but moderate transition band; Trapezoidal filter can achieve very high turning rate and narrow transition bandwidth.In terms of EMI / RFI filtering, taking mobile phone applications as an example, a traditional reference frequency is 800 MHz, because 800 MHz is close to the starting frequency of the frequency band used by mobile phones. In most cases, mobile phone design engineers require filtering at frequencies above 800 MHz, which generally means a minimum signal attenuation of 30 dB. With the increase of functions in mobile phones and the classification of clock and data signals, the reference frequency is decreasing. Many portable electronics manufacturers require EMI / RFI filtering at 400 MHz and may require EMI / RFI filtering at lower frequencies in the future.Integrated EMI filtering and ESD protectionIn portable products, the filter is generally located adjacent to the connection port, microphone and speaker. These locations may also face electrostatic discharge (ESD) events. Taking the audio line as an example, if the discrete component scheme is adopted for EMI filtering and ESD protection respectively, the number of components required to perform these two functions will be faced. For EMI filter, if a discrete type LC filter is used, two surface mount capacitors and one surface mount inductor are required. In order to provide ESD protection, an additional type of surface mount transient voltage suppressor (TVS) diode needs to be added. In this way, EMI filtering and ESD protection of an audio line require four independent components. The precious space of portable devices occupied by these components has not been mentioned here. If there is more than one audio line, it is more impractical to adopt the discrete component scheme.Therefore, the simplest solution is to integrate EMI filtering and ESD protection functions in the same element. Firstly, the integrated TVS diode in the integration scheme also provides the capacitance required for EMI filtering; Secondly, improving the process technology can also greatly improve the quality of integrated inductors. By integrating these integrated components into the silicon wafer, the original scheme that requires multiple independent components can adopt the integrated EMI filtering ESD protection scheme (see Figure 2).Among them, in terms of ESD protection level, IEC61000-4-2 standard specifies the system level test conditions and protection levels in detail, which are divided into four types. Portable applications usually need level 4 protection, that is, under the IEC61000-4-2 test conditions of 8 kV contact discharge or 15 kV air discharge, portable equipment needs to be able to withstand the impact of ESD events.In general, by cost-effective integration of EMI filtering and ESD protection, portable application designers can reduce costs, reduce the number of bill of materials (BOM) components, and reduce the space occupied by circuit boards.EMI filtering ESD protection scheme for specific application of portable equipmentIn the portable device market, mobile phones occupy an important position. Naturally, many locations in the mobile phone will be applied to filters with integrated ESD protection. For mobile phone applications, in addition to LC and RC filters, there are common mode choke EMI filters, which help reduce parasitic inductance and provide better common mode filtering. The type bandwidth spectrum of these mobile phone filters is shown in Figure 3.Figure 3: bandwidth spectrum of mobile phone filter type.Different mobile phone applications need different filters. Generally speaking, the higher the data rate of the application, the smaller the total capacitance of the filter line. For mobile phone applications with relatively low data rate such as audio lines, the standard capacitance of EMI filter in the range of hundreds of PF is enough to provide excellent filtering performance and minimum signal interference.Among them, in audio applications such as speakers, microphones, audio jacks / headphones, LC or RC filters can be selected, such as nuf2441fct1g, nuf2450mut1g, nuf2114mnt1g, nuf2116mnt1g and nuf420mnt1g of ansenmey semiconductor. These filters are integrated with ESD protection function to protect 2 to 4 audio lines, and the diode capacitance is between tens of PF and 240 PF. Taking nuf2441fc as an example, this LC filter provides EMI filtering and IEC61000-4-2 level 4 ESD protection functions for two audio lines. It is encapsulated by flip chip, and a single IC replaces two inductors, four capacitors and four TVs diodes to help save cost and reduce the occupied space of the circuit board.Nuf2450mut1g is also a two-wire LC type EMI filter and ESD protection device, providing attenuation greater than - 30 dB in the frequency range of 800 MHz to 5.0 GHz; This device uses space saving udfn 1.2 one point eight The 0.5mm ultra small package provides a 20 MHz cut-off frequency and minimal line impedance, which is ideal for audio applications requiring low bandpass attenuation. Nuf2114mnt1g is a two-wire RC type EMI filter and ESD protection device. It is packaged in dfn8 and provides attenuation greater than - 30 dB at the frequency of 900 MHz to 3.0 GHz. It also replaces up to 10 discrete components with a single IC to help reduce cost and save space.In mobile phone applications, the bandwidth of data lines such as display screen and camera is higher than that of audio, and RC filter can be used. For example, ansenmey semiconductor adopts a series of devices such as nuf40xx, nuf60xx and nuf80xx encapsulated by udfn. In addition, ansenmey semiconductor also launched X3 series RC filters in very small wdfn / udfn packages for data line filtering applications, including nuf4310mn and nuf4110mn. This new series of 4-channel RC filters has a line capacitance of only 17 pf at 2.5 V and integrates 40 discrete components to provide a very small footprint (1.0 one point four 0.75 mm/1.0 one point six 0.75 mm), extremely low impedance (100 ) and industry-leading ESD protection (IEC61000-4-2 level 4), supporting up to 120 Mbps bandwidth, suitable for high-resolution camera module and display screen of portable products such as mobile phone, mobile interconnection device (MID), portable media player (PMP), digital camera, laptop or netbook.In the above data applications such as high-resolution display screen of mobile phone and camera interface, high-speed LC filter can also be used, such as nuf2900mn of ansenmey semiconductor. Compared with the traditional RC filter, the high-speed LC filter has higher cut-off frequency, greater broadband attenuation and lower insertion loss. For example, the typical cut-off frequency of nuf2900mn is 350 MHz, which provides attenuation greater than - 30 dB at frequencies from 800 MHz to 6.0 GHz, and the insertion loss performance is also more advantageous. See Figure 4.Figure 4: comparison of response performance between typical RC EMI filter and high-speed LC EMI filter (nuf2900).It is worth mentioning that there are more and more high bandwidth applications in mobile phones, with larger display size, higher resolution and limited space, which promote the conversion of parallel data to serial data. The solution is to use low-voltage differential signaling (LVDS) to serial MDDI, MPPI, USB 2.0 and userdes data, and adopt common mode choke (CMC) EMI / RFI filter accordingly, Through the high bandwidth differential signal, the unwanted common mode EMI / RFI signal is filtered at the same time. In this regard, the nuc2401mn high-speed serial data filter of ansenmey semiconductor can be used. This is the industry's first CMC filter integrating ultra-low capacitance (0.8 PF) ESD protection and common mode filtering technology, using a small 2.0 In 2.2 mm DFN package, a single element is suitable for a variety of high-speed designs such as USB2.0 (480 Mbps), IEEE1394 (400 Mbps), MDDI (up to 550 Mbps), Mipi (up to 1.0 Gbps) and HDMI 1.2 (up to 1.32 Gbps per channel), eliminating common mode noise and providing pure data stream for these applications.Figure 5: integrated CMC filter nuf2401mn with ultra-low Capacitance ESD protection for high-speed applications such as USB2.0.It is worth mentioning that nuc2401mn provides better ESD clamping performance compared with silicon competitive devices with a capacitance of less than 1 PF. It is very suitable for EMI filtering and ESD protection applications of high-speed data lines.summaryWith the improvement of data rate and clock frequency, portable devices such as mobile phones increasingly need high-performance EMI filtering and ESD protection schemes. Ansenmey Semiconductor provides a new integrated EMI filter. While providing excellent EMI / RFI filtering performance, it also provides ESD protection function in accordance with IEC61000-4-2 level 4 standard. A single IC replaces 10 or even dozens of discrete components. It is very suitable for audio and data line applications in portable applications such as mobile phones.Source; Mobile China

Apple still Uses Cheaper LCD Screens and Decides to Produce Them by Itself, Endangering the Interests of Many Screen Suppliers

It is reported that Apple plans to use cheaper LCD screens on most iPhone models next year, while delaying the full conversion to high-tech organic light emitting diode (OLED) screens, which also reflects consumers' price sensitivity.According to the Wall Street Journal, apple is expected to launch an LCD model and two OLED models this fall, and the LCD model is expected to account for most of its iPhone sales. It is expected that Apple will continue to use LCD next year, which is completely inconsistent with the previous report of a complete transition to OLED.Apple announced in March that it was testing its internal microled screen.Apple's decision to insist on using cheaper LCD screens has brought more uncertainty to its screen suppliers; In addition, Apple's decision to produce its own screen endangers the interests of many suppliers.Since apple is not expected to use these products in its OLED screen, the shares of Apple's three LCD suppliers, including sharp, LG display and Japan display, have fallen sharply in the past year. Subsequently, when it was revealed in March that Apple was already testing its microled screen, the shares of many display suppliers, including Samsung, sharp and LG display, fell again. This also damages the interests of general display and Synaptics. After reports showed that Apple would use more LCD screens than expected, the share price of general display company, which provides OLED display materials, began to fall.The Wall Street Journal pointed out that Apple's decision to postpone the implementation of OLED screens does not necessarily bring opportunities for LCD suppliers. For example, LG display has planned to invest in OLED screens.Apple has been facing the problem of supply shortage in the past. If suppliers have to change their production plans, Apple may face supply shortage again. It is reported that Japan display raised $320 million in April to meet the expected demand for its advanced LCD.According to recent reports, Apple has communicated its transformation plan to its suppliers, including plans to reduce parts procurement from suppliers by nearly 20% this year. At the same time, the uncertainty of the continuous expansion of Apple's supply chain will also make the new iPhone more expensive than ever.

Apple still Uses Cheaper LCD Screens and Decides to Produce Them by Itself, Endangering the Interests of Many Screen Suppliers

It is reported that Apple plans to use cheaper LCD screens on most iPhone models next year, while delaying the full conversion to high-tech organic light emitting diode (OLED) screens, which also reflects consumers' price sensitivity.According to the Wall Street Journal, apple is expected to launch an LCD model and two OLED models this fall, and the LCD model is expected to account for most of its iPhone sales. It is expected that Apple will continue to use LCD next year, which is completely inconsistent with the previous report of a complete transition to OLED.Apple announced in March that it was testing its internal microled screen.Apple's decision to insist on using cheaper LCD screens has brought more uncertainty to its screen suppliers; In addition, Apple's decision to produce its own screen endangers the interests of many suppliers.Since apple is not expected to use these products in its OLED screen, the shares of Apple's three LCD suppliers, including sharp, LG display and Japan display, have fallen sharply in the past year. Subsequently, when it was revealed in March that Apple was already testing its microled screen, the shares of many display suppliers, including Samsung, sharp and LG display, fell again. This also damages the interests of general display and Synaptics. After reports showed that Apple would use more LCD screens than expected, the share price of general display company, which provides OLED display materials, began to fall.The Wall Street Journal pointed out that Apple's decision to postpone the implementation of OLED screens does not necessarily bring opportunities for LCD suppliers. For example, LG display has planned to invest in OLED screens.Apple has been facing the problem of supply shortage in the past. If suppliers have to change their production plans, Apple may face supply shortage again. It is reported that Japan display raised $320 million in April to meet the expected demand for its advanced LCD.According to recent reports, Apple has communicated its transformation plan to its suppliers, including plans to reduce parts procurement from suppliers by nearly 20% this year. At the same time, the uncertainty of the continuous expansion of Apple's supply chain will also make the new iPhone more expensive than ever.

Will the LED Transparent Screen Become the "Darling" of the LED Screen Market?

Led transparent screen is a popular subdivision screen in the LED field in recent years. We often see the figure of transparent screen whether it is glass curtain wall, glass window or shopping mall. As one of the high-end display products, the price problem of the original transparent screen makes many users can only wait and see from a distance.With the rapid development of LED transparent screen, its price has also decreased significantly to the acceptable range of users, and various spacing and special-shaped display products emerge in endlessly. Transparent screen is gradually emerging in the commercial display field because of its unique display style.Scientific and technological progress is the core of social development and the first productive force. The transformation and upgrading of science and technology has not only greatly improved the modern production capacity of enterprises, but also further improved human vision in social development. In recent years, with the strong support of the construction industry in big cities, the glass curtain wall area of commercial buildings has reached a new peak. In this regard, led transparent screen manufacturers have made major technical upgrades to the transparent display scheme of large-area glass curtain wall. As a provider of indoor and outdoor LED transparent screen display solutions, Shenzhen Jingang vision is also very happy to contribute to our strength under the mainstream of this market.In order to expand the scope of commercial display application market, we continue to integrate new technologies and introduce various innovative technologies, products and solutions to the market. In recent years, led transparent screen solutions have become more and more common due to the use of advanced technology and most market participation. This popularity has also prompted the outbreak of urban commercial exhibition industry, which is also due to the continuous improvement of infrastructure and the rapid development of urbanization.When it comes to transparent screens, the market segments are relatively broad, and the market segments are based on products, technologies, components, display types, screen sizes and application scenarios. Based on various segments, led transparent screen can help enterprises choose growth niche market and strategic development, and determine the difference between the core application field of products and the target market.

Principle of Touch Screen Capacitance Screen_ What Are the Application Areas of Touch Screen

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.