Smart Light Pole: the "new Infrastructure" of Smart City, Which Carries a Variety of Equipment and Sensors Such As LED Screen

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.

According to South Korean media reports, the supply of smart phone OLED display is tight. Although Samsung display is fully operational and produces hard and flexible OLED display at full capacity, it still can not meet the needs of enterprises. According to industry sources, Samsung has received orders for Xiaomi OLED screen, but due to limited supply, Samsung will postpone the supply time to the second half of next year. The new Xiaomi mobile phone with Samsung OLED screen is expected to be launched in the second half of 2018. Xiaomi is in an awkward situation and can only find other solutions, because competitors also start to adopt OLED screens on a large scale, and Xiaomi can't fall behind.Vivo and oppo face the same problem. Oppo originally planned to ship 60 million OLED smartphones this year. Because of the good market sales, now the company has raised its target and plans to ship 90 million to 100 million OLED smartphones. Last year, oppo launched R7 with a 5-inch Full HD screen and R7 plus with a 6-inch Full HD screen. In March this year, oppo released F1 plus with a 5.5-inch Full HD OLED screen. Oppo did not sell R7 phones in the United States because it could not obtain enough OLED screens.In the past, OLED screens were only used on flagship mobile phones, but now they began to spread to mid-range products, resulting in increasing demand for OLED screens by Chinese enterprises. IHS reported that only 21 smartphones used OLED screens (except Samsung) in 2014 and increased to 50 by 2015. This year, oppo, vivo, Huawei, Meizu, micromax, Xiaomi, Hisense, Konka and HP will launch OLED phones and install hard or flexible OLED screens.At the beginning of this year, Samsung has begun to invest huge capital to improve production capacity. The reason for the investment is mainly to meet Apple's needs. In the next period of time, the supply of OLED screens will still be tight.Industry insiders believe that Samsung will complete the second phase of investment this year. At that time, A2 production line (producing 5.5 generations of hard OLED screens) can produce 20000 more screens per month, and A3 production line (producing 6 generations of flexible OLED screens) can produce 30000 more screens. At present, A2 has a monthly production capacity of 1.5 million pieces and A3 has only 15000 pieces. Before next year, Samsung will continue to make additional investment. Once the investment in phases 8 to 11 is completed, Samsung can turn the l7-1 LCD production line into an OLED production line, produce 190000 more hard OLED screens per month, and the production capacity of flexible OLED screens will also increase by 130000. According to the plan, Samsung's investment will continue until 2018, when the monthly production capacity of flexible OLED screens can reach 180000 pieces.An industry insider said: "Samsung display company can't meet the needs of all customers. It must consider that the market may decline and reduce the operation rate of the equipment at that time. Apple plans to use a flexible OLED screen on the iPhone, which has become an incentive for the rapid change of the market."

Phoenix technology news according to DIGITIMES Beijing time reported on January 11, industry sources revealed that well-known Chinese smartphone manufacturers, including Huawei, oppo and Xiaomi, plan to use mini LED backlight display in smartphones planned to be launched in the second half of this year, and have asked panel manufacturers in Taiwan to start production from June this year.Smartphone manufacturers speculate that Apple may launch more AMOLED screen iPhone models in 2018 and purchase more AMOLED screens from Samsung. According to the above sources, although Samsung displayed 146 inch micro LED backlight panel TV at the 2018 international consumer electronics exhibition, such TV is unlikely to develop rapidly in 2018.According to the above sources, with the progress of technology and the improvement of product design, the number of mini LED chips required for 6-inch smartphone screen is reduced from 9000 to 4000, which helps to reduce costs and enhance the willingness of smartphone manufacturers to adopt Mini LED display.According to crystal optoelectronics, the largest Mini LED chip manufacturer in Taiwan, if 15 million smartphones - equivalent to 1% of the total output - are equipped with mini LED displays in 2018, the demand for mini LED chips will reach 60 billion, equivalent to 100000 Mini LED epitaxial wafers per month.According to crystal optoelectronics, a TV needs about 10000 Mini LED chips. If 4% of TVs adopt Mini LED technology in 2018, the global demand for mini LED chips will reach 100 billion.According to crystal optoelectronics, the production of mini LED chips for smart phones and televisions may start in the second half of the year, and the relevant specifications will be finalized in the first half of the year. Mini LED chips for high-end game displays may also be put into production in the second half of this year.Crystal optoelectronics pointed out that the existing LED chip production equipment can produce Mini LED chips after transformation.

In the color TV industry, OLED has become more and more important, and OLED TV has gradually been accepted by many users, becoming a strong competitor of the next generation color TV display technology; What many people did not expect is that OLED's position in the mobile phone industry has also risen, showing strong potential.In today's mobile phone industry, OLED screen is almost synonymous with "high-end smart phone", and most flagship machines of major manufacturers adopt this technology. Data show that there were more than 1 billion mobile phones with OLED screens on the market in July 2018, an increase of 41% over 720 million in July 2016.It is also pointed out that in July 2018, the utilization rate of all activated smartphones was 30.4%, compared with 26.2% in July 2016. The market that contributed the most to this growth was China, with 258 million devices in July 2018 (accounting for 25.4% of the global activated OLED smartphones). The United States has the second largest OLED smartphone, and its global share has decreased to 9.8% from 9.9% in July 2016.Among many brands, Samsung is the rightful overlord of OLED mobile phones. Samsung is not only a hardware manufacturer, but also a manufacturer of OLED screens, which gives Samsung a unique advantage. As of July 2018, Samsung smartphones accounted for 70.5% of OLED display phones, enough to show its position as a leader. However, it should also be noted that this share is lower than 80.6% in July 2017 and 87% in July 2016. The decline in share is not accidental, but a challenge from emerging players - the rise of Chinese market and brands.The Chinese market is not only a contributor to the share of smartphones, but also a contributor to OLED smartphones. Among Chinese mobile phone brands, oppo and vivo are the second and third largest manufacturers of OLED screen mobile phones respectively, and continue to increase their share of OLED mobile phones. Oppo's share increased from 4.6% in July 2016 to 9.3% in July 2018, while vivo's share increased from 3.5% in July 2016 to 8.7% in July 2018. In July 2018, the activated OLED smartphones provided by these two brands accounted for nearly one fifth of the overall market.But for oppo and vivo, there are still stronger competitors, because Apple is also entering OLED. Since the first adoption of OLED on iPhone x, it has ranked fourth in the world by July 2018, accounting for 5.3% of OLED phones. Among the new iPhone products just launched by Apple recently, two of them (iPhone XS and XS max) adopt OLED screens. With the emergence of Apple's new products, its share in OLED smartphones is likely to continue to increase, which will also help OLED continue to promote in the mobile phone industry.Some professionals believe that with the continuous improvement of the promotion of OLED smart phones, the importance of OLED screens in the mobile phone industry is becoming increasingly prominent. Although the LCD screen with lower production cost is still the mainstream of mobile phone screen. If the OLED screen can make a breakthrough in technology and solve the disadvantages such as service life, screen burning and cost, it is expected to become the "standard" of mobile phone screen in the future.

introductionWith the development and improvement of LED technology, large LED displays have been widely used in various public places to display multimedia information such as text, graphics, video images and so on. In the construction of urban information modernization, LED display screen has become one of the important media of modern information dissemination. With the sharp increase in the number of outdoor LED screens and the expansion of the scope of use, new requirements are put forward for the management and control of LED displays.1. System working principleThe system is mainly composed of upper computer and lower computer. The upper computer is a device installed with LED screen management software and can connect to Internet or GPRS network, such as PC, mobile device, etc. The lower computer is the LED screen wireless controller based on AVR MCU control module. The system topology is shown in Figure 1.The system mainly uses GPRS module as wireless modem to realize the dial-up Internet access of LED display wireless controller (as client), TCP wireless communication with upper computer (as server) on Internet network, data transmission and wireless data update of LED screen.2. Hardware design of lower computerAs shown in Figure 2, the wireless controller of LED screen is mainly composed of four parts: power supply module, GPRS module, AVR single chip microcomputer control module and LED display screen.2.1 AVR single chip microcomputer control moduleIn order to ensure the real-time and efficiency of communication data and drive LED display screen, the MCU used in this module is Atmega 162 of ATMEL company with dual serial port. It is an 8-bit single chip microcomputer with low-power CMOS based on avrrisc. It has very high stability and reliability, can adapt to various environments and is suitable for various wireless LED display screen environments.This module mainly processes the information received by GPRS module, transmits the received screen display information to LED screen, and sends at command through serial port to monitor whether GPRS module has new messages. Once there is, it immediately enters the serial port interrupt to process the data. Under the TCP / IP protocol, the data is transmitted in hexadecimal mode without Chinese character decoding, which greatly simplifies the design of the peripheral circuit of the system.2.2 GPRS module circuitThe GPRS module adopts SIM300 of simcom company. The module has small volume and outstanding performance. It can be widely used in wireless voice transmission, on-board system, remote meter reading, safety monitoring, remote control and telemetry, handheld devices and other fields.SIM300 module has a fully functional system interface, integrates TCP / IP protocol stack internally, expands TCP / IP at instructions, and can interoperate the at instructions provided by it through serial port. This can reduce the difficulty of development, easy to realize data transmission, low cost and good scalability of the system.The SIM300 needs an external SIM card holder, and its serial port is connected with the serial port of the single chip microcomputer to transmit the information received by the GPRS module to the single chip microcomputer for data processing. The AVR single chip microcomputer controls the switch of SIM300 module. The connection diagram between AVR single chip microcomputer and SIM300 module is shown in Figure 3.2.3 LED screen driving circuitThe classic 74HC595 is used as the column driver of dot matrix output, and ULN2803 is used as the row driver. The driving circuit design of this scheme has simple software and hardware design, low power consumption, strong driving ability and less I / O port lines. It is a design scheme with low cost and flexible application.3. Communication protocol designBecause the system adopts the communication mode of GPRS network, the upper computer sets up an LED controller management platform to manage all led controllers. The LED controller management platform (i.e. "host computer software") communicates with the LED screen wireless controller through TCP / IP protocol, and can control multiple devices at the same time. The upper computer software and the LED screen wireless controller are connected by GPRS, and the connection relationship between them is shown in Figure 4.The LED screen wireless controller is the client, and its data sending and receiving is controlled by the upper computer software. When the LED screen controller is powered on and running, it will actively establish a connection to the upper computer software and shake hands. After successful login, the upper computer software and LED controller can transmit data.The communication protocol between the upper computer software and each LED screen wireless controller is based on TCP protocol, and an STCP protocol layer is customized to encapsulate the PDU (data unit) data layer protocol. STCP protocol layer only provides a safe and reliable transmission process for the bearing framework of PDU. The structure diagram of communication network layer is shown in Figure 5.Fig. 5 structure diagram of communication network layerIn the customized STCP communication protocol, a series of communication instructions for managing the wireless LED display controller are formulated, which mainly provides specific communication structure and specification for the programming of host computer software. The format of communication packet is shown in Table 1:Table 1 format of communication packetNote:Complete data length: integer bytes (4 bytes in length), the length of the entire communication packet;Command word: according to the communication command table of wireless LED display controller, see Table 2;Explicit control word: 0-none; 1 - move up; 2 - move down; 3 - left shift; 4 - shift right; 5 - stationary; 6 - flashing; 7 - delete;Data content: information content to be displayed;Checksum: cumulative checksum of all data;According to the actual application needs of wireless LED display controller, the instructions of sending, deleting, displaying, connecting and disconnecting are formulated. The codes and main functions of these instructions are shown in Table 2.Table 2 communication instructionsAfter the upper computer software sends the data to the wireless LED display controller through the Internet network, the LED display controller needs to process the received data. According to different instructions, the display content and display mode of LED display screen can be controlled (such as moving up, moving down, moving left, moving right, stationary, flashing, deleting, etc.).4. Software designThe software design of the system includes two parts: the upper computer software and the control program of AVR single chip microcomputer. The upper computer software completes the communication with GPRS module and controls the data information displayed on LED display screen; The control software of AVR single chip microcomputer mainly completes system initialization, GPRS network connection, receives the information sent by the upper computer, analyzes the content of the received information, completes the instructions, converts the released information into dot matrix information as needed, and sends it to the LED display screen for display.4.1 control program of AVR single chip microcomputerThe control program of AVR MCU mainly completes the following functions: connecting GPRS network, data transmission, controlling LED screen display.(1) Initialize the system and SIM300 module and connect to GPRS network; (2) According to the communication protocol between the display controller and the host computer, communicate with the host computer, shake hands, receive instructions, analyze instructions, and store and process display data and other information; (3) The LED screen is driven through the serial port to display information, etc.The following briefly introduces the TCP / IP wireless communication process between SIM300 module and host computer.At cgdcont = 1, "IP", "cmnet" -- register China Mobile NetworkOKATCGCLASS -- Displays the type of GPRS message movementCGCLASS BOKATCGATT -- GPRS service attach / detachCGATT 1OKAt cgact = 1, 1 -- environment activationOKAt cipstart = "TCP", "202.196.87.7", "2020" -- startTCP connection (upper computer IP address and port number)OKConnect OK -- connection successfulAt cipend -- send data over TCP》 HELLOSend OK -- send succeeded4.2 upper computer softwareThe upper computer software of the system mainly uses VC to design a communication interface to communicate with LED remote controller. The user interface part adopts MFC framework and is implemented based on dialog. When using Visual C to develop the network transmission of data through TCP / IP protocol, the IOCP framework is used to realize the completion port model of windows socket.IOCP, I / O completion port, is an asynchronous I / O API that can efficiently notify applications of I / O events. After a socket is created, it is associated with a completion port. When an event occurs, the completion port will be added to a queue by the operating system, and then the application can query the core layer to get the completion port. Once an I / O operation is completed, a worker thread that can process the result of the operation will receive a notification. Create a number of worker threads in this application to handle notifications of overlapping I / O requests.The startup process of IOCP framework is shown in Figure 6.The implementation steps of IOCP framework are as follows:(1) Initialize the Winsock working environment, create the completion port, create the completion port thread, and establish a listening socket to associate the socket with the completion port;(2) The listening socket starts working. When the listening socket receives the connection request from the client TCP, the IOCP will obtain and process the message, create the corresponding socket object for receiving and processing, and complete the connection;(3) After the client completes the TCP connection, it can start data communication. The I / O thread is responsible for distributing I / O requests and allocating the logical processing environment through the thread pool;(4) After receiving the data, an I / O data structure (wsaoverlapped) provided by Microsoft is extended to complete protocol analysis and data processing.In addition, the thread pool here is just a management queue, which is used to manage thread resources and complete the processing of maximum business logic with the least threads. The real thread function does not complete the detailed business processing, but only completes the re call of I / O request, and the virtual function realizes the re processing of I / O request.In order to improve the friendliness of the software, the framework uses the message mechanism of windows to interact with the UI, and transmits the relevant information of the framework to the UI window through the window message. Therefore, a pointer member is reserved in the framework, and the message response function is called through the pointer to send a message to the window when necessary. The UI reflects the operation information of the framework according to the message.5. Conclusion

In recent years, with the increasing saturation of the traditional market demand of LED display and the increasingly diversified and professional demand in subdivided fields, the strength of industrial products and solutions has been continuously improved, especially the improvement of small spacing, which makes the "big cake" of commercial display more open to the LED display industry. Commercial display applications include finance, education, medical treatment, tourism, media Transportation, community and other fields have brought great development opportunities to the business display market. According to the data of the third-party research report, it is expected that by 2020, with the arrival of the smart city, the market scale of business display will be close to 100 billion yuan.Business display market has great potential, leading screen enterprises accelerate innovationAt present, with the further outbreak of the commercial display market and the continuous growth of the market, many LED display enterprises have higher growth space, especially the leading companies with R & D and innovation strength and market strength. They can concentrate more industrial resources, focus on the cutting-edge technology of LED display, improve service quality and obtain more commercial display market share first.For example, in this year, Riad launched p0.6 small spacing products, Samsung promoted p0.84 spacing products to the cinema, high-end clubs and villa color TV market, and many leading screen enterprises have launched Mini LED / micro led and other productsAt this stage, the new LED commercial display technology and products represented by small spacing are gradually diversified, and begin to be applied to the field of commercial display on a large scale. Small spacing LED is gradually becoming the main direction of future innovation of large screen commercial display, especially cob packaging technology, innovative development of mini LED / micro led and application innovation of transparent screen. All these prove that the further improvement of technology will inevitably stimulate the upgrading of market demand. With the development of commercial 5g and policy promotion, high-definition LED display has a considerable potential in the field of commercial display.There are many difficulties in the commercial display market, and LED screen enterprises still need to work hardHowever, this does not mean that led display enterprises can be like fish in water in the commercial display market. According to statistics, the overall scale of China's commercial display market was nearly 47 billion yuan in 2017. However, in the current commercial display market, the penetration rate of LED small spacing products is less than 10%, but the growth rate is as high as 78%. The deficit between growth rate and penetration rate means that led screen enterprises still have many deficiencies in the commercial display market.First of all, in terms of technology, seeking smaller spacing and higher definition LED display is indeed the most direct technical direction for the industry to enter the commercial display market. However, with the gradual application of small spacing led in the commercial display market, we must also solve more market pain points, such as product reliability, high stability and ease of operation, especially in some professional commercial display application fields. Secondly, from a market perspective, compared with other commercial display products such as OLED, the price of high-end commercial display products represented by small spacing is relatively high. How to further reduce the cost and improve the cost performance ratio is a big problem to promote the popularization of LED commercial display products.In any case, I believe that with the further outbreak of the commercial display market and the high growth space given to the LED display industry by the market, as long as the screen enterprises give full play to their technology, products and market advantages, they will be able to share the dividends of the development of the industry.

What's the best way to clean an LED screen?I only ever clean mine with a damp cloth and then wipe over with kitchen towel. I do the same with the tv screen and no scratches there------What kind of tv was most watched in the late 1950s early 1960s?Variety shows were popular; these were shows where guests would appear and do skits or short shows, talk to the host, and not much else. Ed Sullivan was one such show. Senor Wenchas (? spell) was on his show a lot. The Beatles debuted on his show. All TV shows were family shows; married people had twin beds in their rooms, no cursing, no blood and guts. Kids were innocent. Gunsmoke was a western that was very popular. Game shows like What is My Line were on. There were cartoons for kids. A kid'show was Romper Room, and another one had a puppet o'possum that would give "possum kisses" to the kids on the show. I had a heavy clear plastic film (much like a heavy clear plastic shower curtain) that I could apply to the TV screen and when they did a drawing on TV I could follow the lines with crayons and copy the drawing at my house! Very exciting to me------Breaking a TV screen for an art project?The tube may implode. Wear eye protection------2018 Expedition Rear Entertainment SystemI just figured this out for myself after trying to do it via the instructions above. I was missing the step where I had to use the arrows on the tv screen to scroll on to the screen to select the Bluetooth option and click on it. It then asked up front if I wanted to connect automatically.------Can't See the Movie? Here's How You Clean a Flat Screen TVOver time, your TV gets dirty. It might be dust and hair, greasy finger marks, splashes from coughs and sneezes, or worse. At first you may not notice the dirt, but as it coagulates and builds, you could be left thinking that your TV picture has got worse. Cleaning your flat screen TV is increasingly important in an era of heightened hygiene. Here's everything you need to know about how to clean TVs and monitors.Why Do You Need a Clean Flat Screen TV? A flat screen TV looks amazing when its clean. But when its dusty and grimy the picture quality suffers and so does your enjoyment. Dusting the TV daily is wise as it ensures the TV works at its optimum capability. Excessive dust leads to heat build-up, which can result in poor performance. This is particularly relevant to smart TVs, which are essentially computers.Grease and splashes can potentially prove more dangerous than dust, however. Coughs and sneezes can end up landing on a TV if not caught; grease can harbor bacteria. TVs might not be as bad as remotes or game controllers when it comes to the inadvertent collection of bacteria, but they are still not good. So, a flat screen should be: Free from droplets from sneezing and coughing Now that's clear, here's everything you need to know about how to clean a flat screen TV. What You Need for Cleaning a Flat Screen TV What do you use to clean a flat screen TV? Before you start, make sure you have: A soft microfiber cloth: It's important that you do not use paper towels, tissue, or rags as these can cause scratches on your TV screen. If you do not have a microfiber cloth, an anti-static microfiber cloth such as the type used to clean eyeglasses and camera lenses, etc., can be used.Distilled water spray: This should suffice for most cleaning. Distilled water and soap spray: For tough grime, a mild solution of soap and water can be used. Panasonic recommends a very mild 100:1 ration of water to detergent for its screens. Antibacterial spray: this is optional, depending on how clean you want to go. While you would probably discourage people from touching the TV set, it does not hurt to ensure it is bacteria-free.Incredibly, that's all you need. How to Clean Your LCD/LED/OLED TV Screen Ready to clean your TV? Here's what you need to do: Turn off the TV. For safety, also unplug the unit from the mains electric. With the cloth, wipe the dust from your TV screen. You should also dust the sides and back of the TV. For greasy marks, spray the cloth, then wipe in small circles to loosen the dirt. It is vital that you do not spray the TV, as this can cause complications with the interior electrics. Tough muck? Use the water and soap spray, again spraying the cloth before wiping the TV screen clean. Finally, if you are planning the deep clean, wet the cloth with the antibacterial spray. Wipe this across the screen, around the edges, buttons, and anywhere else that may be touched. Your TV is now clean.Give it a moment to dry, then switch it back on. Own an Old Tube TV? Here's How to Clean That Need to clean an old TV? Old fashioned, pre-2005 TVs are typically cathode ray tube (CRT) screens, most often still used by retro gamers and some old computer systems and servers. Some later CRT models had flat screens, too, mostly for picture quality and aesthetic purposes. Surprisingly, these glass screens are easier to clean than flat screen LCD and plasma sets. The glass screen means that you can use window cleaner.What you need is: Standard window cleaner. If you do not have any, make your own with a white vinegar/water mix of one-part vinegar to two-parts water. Suitable, glass-friendly cloth. This should be clean and dry before starting. Switch off the TV and unplug from the wall. Wipe the set down with the anti-dust cloth. Spray the window cleaner onto the cloth. Polish the screen as you would a window. Leave to dry for a few moments. When you switch the old TV back on, the picture should look clean and bright once again. If you've taken the time to clean your TV and make it dust, dirt, and germ free, it makes sense to consider the remote.Prone to gathering sweat and dead skin, dust, splashes from coughs, sneezes, and drinks, not to mention crumbs of food, a TV remote control is positively filthy. Sadly, taking remote controls apart to clean them is not straightforward. If the device has bubble buttons, then wiping it clean should be straightforward. However, the type of remote control with rubber buttons is harder to deal with and for a full deep clean requires disassembly. There is not a standard way to do this as all remotes are different, but it's worth researching.Until you've found how to disassemble the remote control, tap it face down on the edge of a table. This will dislodge any loose crumbs and dirt before you wipe it down with a lightly dampened cloth. Again, consider antibacterial spray for the deep clean approach. Related: How to Clean an Xbox One Controller Now You Know How to Clean a Flat Screen TV Cleaning your TV is surprisingly straightforward. These steps will work on typical LCD and AMOLED flat screen TVs, as well as plasma televisions.Furthermore, you can use the same techniques (but with different cleaning solution) on old tube-based flat screens. With a clean flat screen TV, you can finally sit back and enjoy crystal clear shows and movies, as good as the day you bought it. But do not leave it too long next time. Establish a regular routine to keep your TV clean of dust, dirt, and disease-causing bacteria.

Data show that in 2018, the total investment in global display equipment was about 21 billion US dollars, and 88% of them were from Chinese mainland. However, the production capacity of traditional LCD panels is large enough, so in order to transform, a lot of Chinese funds have flowed into the field of small-size OLEDs, and China's OLED display technology has achieved a rapid rise. So with the maturity of technology, will the future iPhone use domestic OLED screens?Strong rise iPhone is about to use domestic OLED screen?The author believes that this is very possible. From iPhone x to iPhone XS, OLED has become the standard configuration of Apple's medium and high-end mobile phones. It is expected that Apple's new products will also focus on OLED screens in 2019. As an important manufacturer in the mobile phone industry, apple still has a great demand for OLED screens in the future.However, because LG's supply has not been improved, at present, only Samsung can supply OLED screens on a large scale, which makes Apple have little bargaining power, and the price of OLED screens has been maintained at a high level. Apple needs more partners to reduce screen costs, and China's OLED industry is rising strongly. The two coincide.Domestic panel companies have begun to provide OLED screens for mobile phone manufacturersWill the iPhone use domestic OLED screens in 2020?China's OLED industry is developing rapidly. Panel enterprises including BOE and vicino have begun to provide OLED screens for mobile phone manufacturers. With the upgrading of technology and the expansion of production capacity, Chinese panel enterprises will have the strength to provide OLED screens for iPhones in the future.Among them, apple is likely to cooperate with BOE. It is understood that BOE's OLED panel yield can reach 70%. It is reported that with the maturity of technology, BOE may provide apple with OLED screen as early as 2020. In other words, after more than a year, we can use the iPhone with domestic screen.

At present, the OLED screen on the market (including Samsung's AMOLED screen) must hurt the eyes much more than the LCD screen with PWM dimming and flashing frequency of more than 1250hz.With the impact of the full screen trend, more and more mobile phone manufacturers have used OLED screens for their flagship. Compared with LCD screen, OLED screen has many advantages: light and thin, power saving, good color and so on. However, the current OLED screen also has some defects that can not be ignored - "blindness" and "screen burning".blindAccording to IEEE (Institute of electrical and Electronics Engineers) literature, stroboscopic LED lights can cause diseases related to visual fatigue, migraine or photosensitive epilepsy.According to IEEE par1789, for OLED screen mobile phones that currently use PWM dimming, the PWM dimming flashing frequency that affects human health at low risk should be at least 1250hz, and the PWM dimming flashing frequency that basically will not affect human health should be above 3000hz!Even Samsung super AMOLED, the best OLED screen on mobile phones, has a PWM dimming flash frequency of only about 215hz-250hz, which is far lower than the health allowable range described in IEEE literature.In addition to the stroboscopic frequency lower than the health allowable value, there is another parameter that can affect the harm to people: stroboscopic index.Stroboscopic index = (maximum brightness - current brightness) / maximum brightnessIn short, for the super AMOLED screen with PWM dimming and flashing frequency of 240Hz, the Health recommended value should be 0.24.Calculate the current iPhone X: the maximum brightness of the full screen of iPhone x is 580nits. In terms of stroboscopic, the brightness should not be lower than 440nits.The recommended screen brightness of mobile phones for indoor use during the day is 100nits-200nits, and the brightness for healthy use at night is lower. Xiaomi even promoted the 1nit brightness ultra dark night light screen on Xiaomi 6.In other words, whenever you use AMOLED screen mobile phone indoors, you are either injured by high brightness or by stroboscopic.You can see what stroboscopic is like by looking at the moving picture below. With the change of iPhone x screen brightness, PWM regulation will also change.Although the camera can capture the stroboscopic, it does not mean that the eyes can feel the stroboscopic, because some people are more sensitive to the stroboscopic, and some people are less sensitive, so there are still individual differences in the stroboscopic aspect.Burning screenWhen "blind" is finished, let's take a look at the burning screen.Why does the OLED screen burn?Because of the display principle of OLED screen (including Samsung AMOLED screen), each pixel of OLED screen can emit light by itself. However, due to the different emission time of different pixels, the attenuation speed of each pixel is different, that is, what we call "screen burning".However, in general, the following pictures should appear on the OLED screen. It is difficult to burn the screen in this case! Because according to the previous cetizen screen burning test, this degree of screen burning on iPhone x will not appear until 510 hours after the same picture is displayed on the bright screen!For ordinary users, the maximum screen brightness will not be turned on and the same screen will be displayed for more than 510 hours, so it is difficult to burn the screen in general.Subsequently, many users found that the new monitor hurt their eyes more than the old monitor. At that time, manufacturers were boycotted as much as the current civil "anti OLED alliance" protest, and then many manufacturers began to promote the "non flashing screen".Today, LCD screens on desktops and mobile phones rarely use PWM dimming. However, a few years ago, the beggar version of Microsoft Surface Pro 4 actually used PWM dimming (not in other versions, really core m has no human rights).Do you think there is any difference between the two screens?

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.