Analysis on the Characteristics of LED Display Screen and LCD Splicing Screen

LCD splicing screen is a hot large screen terminal display product, which is used in many fields and favored by people; At present, the common installation methods of LCD splicing screen are divided into four types: embedded installation, cabinet installation, wall mounted installation and floor support installation; Today, Xiaobian will learn about floor stand installation with you. 1 Install fixing bracket, base plate, terminal board and power switch. Preparation materials: fixed support, base plate, terminal board and power switch. Job content: 1. Check whether the fixed support, base plate and terminal board have deformation, scratch, abnormal color and other defective product marks. If there are any defective marks, put them into the defective product box. 2. Place the fixed support, base plate and, and screw in the screws; 3. Align the terminal board with the screw hole of the base plate and then screw it; 4. Install the power switch to the corresponding position of the terminal board, and check whether the installed power switch button is flexible. (Note: materials shall be placed neatly)2 Install the main board and power board. Prepare materials: main board and power board. Job content: 1. Align the terminals on the main board with the holes on the terminal board, and then align the positioning holes on the main board with the positioning holes on the base plate, and screw them. 2. Align the locating hole on the power board with the locating hole on the base plate and screw it. (precautions: materials shall be placed neatly) upper station: install fixed support, base plate, terminal board and power switch; Lower station: install back light, screen line, mainboard power line and temperature sensor; 3 Install backlight line, screen line, mainboard power line and temperature sensor. Prepare materials: backlight line, screen line, mainboard power line and temperature sensor. Job content: 1. Connect the switch power line to the corresponding position of the power board, and hit the ground wire to the screw hole of the power board; 2. Connect the backlight lines 1 and 2 to the corresponding positions of the power board respectively; 3. Connect one end of the screen cable to the corresponding position of the main board; 4. Connect the main board power supply line to the corresponding position of the main board, and the other end to the corresponding position of the power board; 5. Connect the temperature sensor to the corresponding position of the main board, and hit the other end to the screw hole of the power board. (Note: each wire must not be inserted wrongly or reversely) preparation materials: fixing screws.4 Installation contents of Hua Bangying LCD splicing screen: 1. Fix the fixing bracket on the LCD screen and screw in the fixing screws; 2. Connect the screen line and backlight lines 1 and 2 to the corresponding interface of LCD screen respectively; Upper station: install back light, screen line, mainboard power line and temperature sensor. 5 Test semi-finished products: 1. Connect the power line to the power interface and turn on the switch; 2. Check whether the character display on the screen is normal; 3. Put it into the next station after passing the inspection.6 Prepare materials for installation of screen fan: screen fan. Job content: 1. Align the fan with the hole according to the specified direction, install screws, and then install nuts for fastening. 7 Install the manual and maintenance window baffle and prepare materials: manual and maintenance window baffle. Job content: 1. Align the hand with the corresponding screw hole of the rear housing and screw in the screws; 2. Align the maintenance window baffle with the screw hole of the rear housing and screw in the screws. 8 Preparing materials for installing the rear cover: rear cover. Job content: align the back cover to the rear of the screen, close it and screw it up.The above is the general steps of floor stand installation of LCD splicing screen, which needs to be carried out step by step (the specific situation can be judged according to the site situation), which is very useful for some people who have just come into contact with LCD splicing screen; After all, the LCD splicing screen is a relatively expensive thing. Its installation is a process that needs to be careful. If it is careless, it is likely to cause damage to the LCD splicing screen and cause great losses.Source: http://www.hbony.com/

Difference between did LCD splicing screen and DLP rear projectionDid liquid crystal display system consists of three parts: splicing display wall, multi screen splicing processor and signal source. The multi screen splicing processor is the core of the key technology, and supports the display of images with different pixels on the large screen display wall, as well as the arbitrary opening of windows, window zooming in and out, and cross screen roaming display on the large screen display wall. However, DLP large screen splicing system is to pass the cold light source emitted by UHP bulb through the condensing lens, homogenize the light through rod, divide the processed light into RGB three colors (or more colors such as RGBW) through a color wheel, project the color from the lens on the DMD chip, and finally reflect it through the projection lens to image on the projection screen.DLP digital light processing technology: its imaging principle is based on chip level all digital processing and reflective imaging structure that makes full use of light efficiency. It has comparative advantages over other display application technologies in core index parameters such as resolution and contrast. It is relatively more suitable for the application of industrial control image mainly displaying fine graphics and text. With its professional box splicing process, the splicing can reach the level of less than 0.5mm, which fully reflects the scale advantage of large screen (LSD) display mode, and the overall structure of the system is firm and stable.However, due to the light and thin equipment and easy installation, did liquid crystal splicing is suitable for small-scale distributed display applications (generally commercial applications). It is mainly due to the existence of backlight plate in its imaging principle. Compared with plasma products, its display brightness is better. The biggest difference between the two products is visual: the DLP splicing mode is only 0.5mm, and the visual effect is better; At present, the smallest joint of did liquid crystal is 7.3mm, which has a great impact on people's intuition, especially in terms of text.Which is better for did LCD splicing screen and DLP rear projection1 The budget uses less did LCD splicing screen and higher budget uses DLPDue to the different technical composition, the overall selling price of did LCD splicing screen and DLP is still very different. From the perspective of the average selling price of the industry, the price of a did LCD splicing screen is about thousands of yuan per piece according to the size and seam, while the price of the 60 Inch screen with the smallest size of DLP is about 30000 yuan per piece, with a price difference of several times. Moreover, in the after-sales cost, did LCD splicing screen is basically not, because it has good stability and rarely fails, while DLP needs to replace parts regularly, and the subsequent expenditure is higher.Therefore, we can first design the size and area according to our own needs, so as to calculate how many screens need to be spliced. In this way, we can calculate the overall cost and decide which one to use according to our affordability.Both did LCD splicing screens and DLP have certain seams, but the seams of DLP are relatively small. At present, the minimum seam of did LCD splicing screen is 0.88mm on both sides, while there is only one seam of DLP, about 0.2mm. The overall difference is that the splicing display effect of DLP is better, the display obstacles between screens are smaller, and the image has no sense of division.3 Select according to the installation environmentThe installation environment is different and the products used are different. For example, DLP has low brightness and large volume. Therefore, DLP can not be used in some occasions with small installation space and good daylighting. Because the brightness is low, the screen will reflect light when the light is good, so the above contents can not be seen clearly. In addition, the screen depth of DLP will reach about 50cm, and it can only be maintained and installed after installation, It takes up a lot of space.The did LCD splicing screen supports front maintenance, and its panel is only about 5cm, which is convenient for installation and saves more space. In addition, the brightness of LCD is higher. Even if the daylighting is better or installed in the hall, it can meet the requirements of normal viewing, and the screen will not reflect light, etc.In recent years, with a series of advantages such as high cost performance and high stability, did LCD splicing screen has ushered in rapid development, with an annual growth rate of more than 30%. In addition to the traditional security monitoring and display field, it has also expanded to the fields of conference, display, advertising and so on. DLP has low cost performance and high maintenance cost, and its splicing advantage is not obvious with the listing of 0.88mm ultra narrow edge LCD panel. Therefore, the use of DLP in recent years is less and less, showing a downward trend as a whole.Therefore, when choosing whether to use did LCD splicing screen or DLP, we must consider from many aspects. They also have their own advantages and characteristics, but from the overall application and development, LCD is undoubtedly a better choice.(comprehensive arrangement: sohu.com and Weikang International)

The installation of LCD splicing screen is not the same as that of ordinary display equipment. It is only installed as soon as it is placed. For the installation of LCD splicing screen, we should not only carefully select the installation site, but also pay attention to the light around the installation environment, pay attention to the wiring, and also have requirements for the frame. Let's talk about how to install LCD splicing screenMethod / step  selection of installation ground:The installation ground of LCD splicing screen shall be flat, because the whole system of LCD splicing screen is relatively large in both volume and weight. The selected ground also needs to have a certain weight bearing capacity. If the ground is ceramic tile, it may not be able to bear its weight. Another point is that the installation ground should be anti-static.Precautions for wiring:   when installing the LCD splicing screen, pay attention to distinguish the power line and signal line during wiring, and install them in different places to avoid interference. In addition, the length and specifications of various lines required shall be calculated according to the screen size and installation position of the whole project, and the needs of the whole project shall be calculated.   although the brightness of LCD splicing screen is very high, it is still limited after all, so the light around the installation environment should not be too strong. If it is too strong, you may not see the picture on the screen. The light that may enter near the screen (such as windows) shall be blocked if necessary, and the light * shall be turned off when the equipment is running to ensure the normal operation of the equipment. Do not install a lamp directly in front of the screen, just install a barrel lamp.  in order to facilitate the maintenance of LCD splicing screen in the future, the frame edge must be removable. About 25mm gap shall be reserved between the inner edge of the outer frame and the outer edge of the splicing wall, and the allowance shall be appropriately increased according to the number of columns for large splicing wall. In addition, in order to enter the box for maintenance in the later stage, the maintenance channel shall not be less than 1.2m wide in principle. The removable edge strip should press the screen edge for 3-5mm. After the box and screen are completely installed in place, * fix the removable edge strip.  air conditioner or air outlet must be installed in the maintenance channel to ensure good ventilation of the equipment. The air outlet shall be located as far away from the LCD splicing wall as possible (about 1m is better), and the air at the air outlet shall not be blown directly against the box to avoid damage caused by uneven cooling and heating of the screen.      at the LCD splicing construction site, the installation and commissioning shall judge the cause according to the phenomenon reflected by the fault, and focus on the inspection of the synchronous interface and transmission cable of the equipment, as well as the synchronous frequency range of the signal source and the display terminal. If the image has ghosting, check whether the transmission cable is too long or too thin. The solution is to change the line for test, or add equipment such as signal amplifier. If the focus is not ideal, the display terminal can be adjusted. In the face of problems, we must first learn to analyze in order to better solve the root causes of problems. Through strong analysis, we can shorten the inspection time. These methods are some of the methods and skills of installation and debugging. Installation personnel must be proficient, and only professional people can do professional things.  professional knowledge of LCD splicing technology  manufacturers who develop and produce LCD splicing screens know that the production process of industrial LCD screens is much higher than that of general display equipment. Even at the same panel level, the production requirements of LCD splicing screen should be more strict. Although many security monitoring enterprises begin to use LCD splicing screen, their understanding of LCD splicing screen is too simple, and their understanding of industrial display equipment is very simple. In fact, at present, the construction and type selection of many LCD splicing screen engineers do not meet the specifications, even if they choose foreign brands. Many large screen display projects do not give full play to the advantages of LCD splicing screen, and do not achieve high-definition effect, * small splicing. From the micro point of view, more companies only know the installation and lack the necessary knowledge. Today, LCD splicing screen manufacturers supplement some professional knowledge for you.  1. Comparative advantages of LCD splicing screen and other computer displays   the LCD splicing screen adopts A-level LCD panel with high reliability to ensure the quality of display. For the large screen, the role of LCD panel is undoubtedly * important, which accounts for about 70% of the cost. However, the selection of A-level panel for general display will increase. At present, the LCD panel is divided into a , a -, B , B -. It is good for the computer monitor to choose B panel, but the application environment of LCD splicing screen also determines the high requirements of LCD panel.  2. Ultra narrow frame design of LCD splicing screen   the LCD splicing screen has no frame, slim design on both sides, and uses less than 1mm flat cable, which is obviously superior to the BSV LCD splicing technology of general display equipment. It is bound to set off an upsurge of LCD seamless splicing in the monitoring field, which will form a "blowout effect" of market demand.  3. High resolution LCD splicing screen supports point-to-point display   for "other machines", we mainly make great efforts on the chip of signal input processing. Although the parameters shown can reach 1080p, they are not full HD HDCP display, and their LCD is not a point-to-point display panel composed of 1920 pixels horizontally and 1080 pixels vertically   4. LCD splicing screen adopts high-quality electronic components (IC, capacitor, inductance coil, etc.)The quality of LCD splicing screen products has strict component selection system and perfect production line. The products of each production line are strictly roasted and tested before leaving the factory. Unlike "other machines", the purchase time of the panel is very compact when leaving the factory, and the production and assembly leave the factory at will. Because "other machines" have no products in stock, they can only be assembled, produced, processed and installed for customers when they need to be delivered. The time is generally very short. The quality of IC, capacitor and inductance coil directly affects the service life and safety of the display.5. The LCD splicing screen has the unique technology of dniepro color and signal enhancement   for LCD, the control IC with accurate color control can make the display effect of LCD more brilliant. Its control IC can select 1 billion * colors from about 68.6 billion colors, which is more accurate in restoring the color of the object. The general display signal motherboard simply decodes the signal and displays it directly without IC processing.   6. The LCD splicing screen has a dynamic enhancement signal to ensure the dark color and dynamic drag of black and white   the design and material selection of IC chip and control circuit of display are also very important. The first-line large factory itself has a panel production line, which can design and develop the control circuit from the perspective of * as a professional. From material to workmanship, it can ensure that the large screen display can work stably for a long time, and strengthen the processing of various input signals to ensure the effectiveness of gray scale.  7. LCD splicing screen adopts advanced power DPMS   DPMS management system enables the power supply and signal board to play a * role to protect the LCD panel and reduce power consumption at the same time. In the "lamp driving circuit" of the display, the high-voltage strip is connected to the lamp inside the panel to light it and control its brightness. Therefore, the brightness of the display is mainly related to the number of lamps placed in the panel. The more the number, the higher the brightness. For "other machines", all CCFL tubes in the panel are driven to light up, so that the display can work with high brightness for a long time and heat for a long time, which seriously loses the service life of the panel. The mystery of why the LCD splicing screen is called a low thermal energy panel is not on the LCD panel, but driving the motherboard to automatically light up the CCFL tubes in the panel by using the chip.

LCD splicing screen and LED display large screen are recognized as the most popular and widely used large screen display products in the display market; However, many people are curious about the similarities and differences between the two. Today, Xiaobian will specifically distinguish the characteristics of the two products.1. Brightness due to the strong outdoor lighting, the brightness of the large LED display screen is relatively high, and the brightness of the splicing screen is as high as 7000CD / m In order to adapt to some special environment or users with special requirements. 2. The stitching of the splicing screen can be followed by the naked eye, which is also a disadvantage of the splicing screen itself; The large LED display screen can not see the distance between the lamp beads within the visual distance, but if it is close to the visual range, the image will begin to blur and deform; For example, under the visual condition of P3, if the LED is viewed within 3M close to the screen, the picture must be distorted.3. Quotation: two clocks show the quotation of the large screen, and the LED is calculated according to the square of the project and other expenses; The splicing screen is calculated according to the number of splicing units, processing software, installation cost, etc. 4. The operation time splicing screen can support 7 * 24 hours of uninterrupted and non-destructive hardness, while the large LED reality screen must rest after running for more than 8 hours to ensure the service life of the product. 5. Different splicing technologies. The splicing screen is composed of multiple LCD splicing screens, which supports multiple signal inputs. It can realize the simultaneous display of multiple images and can be enlarged or reduced arbitrarily, so as to realize roaming and cross screen display. In addition, it can also realize single screen segmentation with decoding platform, so that users with multiple monitoring images can display all images on a large screen at the same time; The small spacing LED is the fine processing of LED display technology, which reduces the point spacing.The above are several important differences between the splicing screen and the LED display screen. I hope it will be helpful to some buyers who have just touched the splicing screen or LED. If you have any questions, you can leave a message for consultation.Source: Huabang yingzhuanxian Technology http://www.hbony.com/ , it is personal original, if you need to reprint, please indicate the source.

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.

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.

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 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.

Fingerprint identification on mobile phones has become an indispensable part of our daily life.Especially during the epidemic, face recognition is mostly paralyzed due to wearing masks, and fingerprint recognition has become the current optimal solution.Of course, if you use a mobile phone without fingerprint identification such as iPhone x, you have to find a way by yourself...9to5mac also gave a tutorial on using face ID with mask Screen fingerprint identification has become the mainstream, and the technology is also very mature. However, Tony saw a news while surfing the Internet today, saying that Tianma, a domestic LCD and LCM design company, released the world's first LCD Screen multi-point fingerprint identification scheme (Ted finger print, referred to as TFP).The strength of this scheme is that the off-screen fingerprint identification mobile phones we use now are basically OLED screens, while the LCD screen basically has no on-screen fingerprint identification...One plus 6T off screen fingerprint identification diagram As we all know, the screen fingerprint unlocking needs the illumination of the light source for fingerprint identification, but the LCD screen is relatively thick and has poor light transmittance; Second, the LCD screen cannot emit light actively, and the backlight will interfere with the identification of optical fingerprints.These two problems make LCD basically bid farewell to screen fingerprint recognition.Therefore, mobile phones with LCD screen basically adopt side fingerprint identification, and some will be combined with the power key on the side of the mobile phone.But OLED screens don't have this problem. Because the OLED screen is thinner and more transparent, it is natural to use fingerprints on and off the screen.Then why do manufacturers not directly on the OLED screen, but want to operate madly on the LCD screen? The reason is also simple: because LCD screens are cheap...Although Lu Weibing, vice president of Xiaomi, said publicly some time ago that Hongmi team successfully realized fingerprint recognition under LCD screen on a redmi note8 Pro prototype, so far, no manufacturer has officially announced this technology, and Tianma is the first.So Tony was surprised when he saw the news. This fingerprint identification scheme can be said to break through the two obstacles of current screen fingerprint identification technology - LCD screen and identification area.If the multi-point fingerprint identification in the LCD screen can achieve mass production, it means that the LCD screen can also use fingerprint identification!Another point is the identification area of off screen fingerprint identification.So far, the identification area of screen fingerprint is basically fixed, almost at the lower position of the screen. People will subconsciously put their fingers at the approximate position when unlocking the mobile phone.But no one can guarantee that every time the finger is pressed on the fingerprint identification area, because the identification area is so large, it is inevitable that there will be deviations...The scheme announced by Tianma this time shows that it can make the whole LCD screen recognize fingerprints!Tony mended his brain, that is, I could identify my fingerprint and unlock my mobile phone by placing my finger anywhere on the screen.If this multi-point fingerprint identification technology can be mass produced, the efficiency of unlocking the screen will be much higher than now. You don't have to find the identification area and poke it on the screen.It can be said that Tianma's operation directly makes the LCD screen ride on the head of OLED in fingerprint identification. Once LCD screens didn't even deserve fingerprint identification. Now they not only have fingerprint identification, but also can identify 5 at a time...As for why the multi-point fingerprint solution in the TFP screen can realize these functions, high integration has played a great role.In short, it is to integrate touch, display and fingerprint identification, replace the previous design of fingerprint identification module and reduce the thickness of the screen, so that the screen fingerprint identification is feasible on the LCD.At the same time, in order to realize fingerprint identification on the whole screen, Tianma covers the whole screen with optical path and sensors.As for how multi-point fingerprint identification can play new tricks, it still depends on the subsequent operations of manufacturers.As for the fate of LCD screen after mass production of this scheme, we still don't know, but before that, LCD screen has never been the first choice for mobile phone manufacturers.After all, the OLED screen is thinner, can emit light by itself, and the color is more bright. The experience is much better than that of LCD, but there are still problems of stroboscopic and screen burning, and the price is relatively expensive.When it comes to the LCD screen, the advantages and disadvantages are reversed...The price of iPhone 11 with LCD screen is lower For most users, OLED screen is their first choice, but there are still a group of people who stick to the LCD screen.In addition to having a larger viewing angle, another reason is that they can't accept the strobe of OLED screen. They think it's really hurting their eyes...Therefore, once the TFP scheme realizes mass production, the defect that the LCD screen has no off screen fingerprint will be supplemented. If the price can be controlled well, the current situation of the screen in the mobile phone market may change a lot.However, before that, the mobile phone market was still dominated by OLED screens, not to mention the suoper AMOLED screens such as Samsung. The evolution of LCD screens has a long way to go...

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."