Cob Display Screen Is Used in the Conference Room. Which Model Is Better

Following Lehman's announcement of the third generation cob display on July 7 this month, recently, a message that dehuorunda led the market to develop a full flip RGB cob display module has become the focus of the industry. This is the third generation cob display technology released by Lehman on July 7. Cob display has once again successfully caught people's attention.In less than a month, led listed companies successively revealed the latest information of cob display, which is really rare. This is like letting the cob display screen, which has always had a low sense of existence, suddenly stand under the magnesium lamp and become the object of attention.Development history of cob displayCob packaging technology began to enter the field of LED display as early as around 2010. Previously, it was only widely used in the field of lighting. Compared with the display screen of traditional surface pasting technology, cob display screen has many advantages, such as high reliability, low cost, easy realization of small spacing, large viewing angle luminescence, wear and impact resistance, easy cleaning, strong heat dissipation capacity, etc. However, after several years of development, cob display screen has not been effectively solved in technical and process problems such as ink consistency, yield, after-sales maintenance, etc, As a result, cob display can not break through the bottleneck of mass production.The restriction of technology and technology, coupled with the low participation of enterprises, is the root cause of the early birth of cob display screen, but it has been unable to develop rapidly. With the demand of LED display for high-definition display, the technology, process and cost of small spacing LED display realized by surface paste technology are facing great pressure in the process of moving towards higher definition. As an alternative to the micro LED technology route of LED display, cob display naturally began to attract the attention of display enterprises and become another possibility for the development of small spacing LED display. Therefore, in recent years, more and more LED display enterprises have invested in the research and development of cob display technology. In addition to listed companies such as Lehman and dehuorunda, emerging companies such as jingtaixing optoelectronics are working on cob display technology in the industry.At present, cob display enterprises represented by HIDA electronics have brought cob display into the P1.0 era, and cob display will move towards smaller spacing in the future. In order to overcome the existing technical problems and mass production bottlenecks of cob display, enterprises engaged in cob display R & D in the industry have spared no effort.Dehao Runda's new cob display technologyIt is reported that through the resource integration of its business division and the joint research and development of the two business divisions of devices and display, Dehao Runda has successfully produced a full flip RGB encapsulated cob display module. The p0.95mm with a very small spacing and the large angle light shock experience of 180 have successfully crossed the technical problem of the current formal cob display. At present, Dehao Runda has mass produced a single display module of 171 * 76mm, which can complete a 27.5-inch full flip RGB cob display through seamless splicing. While the pixel spacing reaches p0.95, it also provides a perfect specification of 1200nits with high brightness. By making the single pixel size as small as 0.025mm2, the proportion of black optics in the display screen is greatly increased to 98%.De haorunda's flip RGB cob display adopts different technical routes. Moreover, de haorunda's full flip RGB cob experiment progress in the R & D stage has successfully completed the p0.5 ultra dense display module template. Once cob display overcomes the current bottleneck restricting mass production, the LED display industry may usher in a new situation in the future.Cob display market prospectAt present, in the field of small spacing, the competition among LED display enterprises is very fierce. Although there is a threshold for small spacing, as long as human and material resources are invested in technology, driven by funds, they can always enter this market. We can also see this from the fact that more and more display enterprises are pouring into the small spacing market. When the major display enterprises scramble to compete for the small space market, it is bound to have an impact on the industry and bring profit impact to the display enterprises. In today's small spacing market, compared with previous years, the price has fallen sharply, and the price war is beginning to take shape.However, in the cob display market, because there are few manufacturers with cob display technology in the industry, the previous enterprises that touch and roll in the field of cob display have won the first opportunity and have the first mover advantage in intellectual property rights. For example, Lehman's innovation in cob small spacing LED display technology also protects the research results of these cob small spacing display technologies through patent application. So far, Lehman has applied for more than ten patents related to cob display technology, among which patents such as an LED display screen, LED packaging method, manufacturing method of circuit board and display screen have been authorized by the State Intellectual Property Office.When latecomers enter this field, they are bound to be unable to bypass the factor of intellectual property rights. The later you enter, the more sharp your teeth will be. However, latecomers also have the advantage of late development. When the road ahead is blocked, enterprises will find another way like Dehao Runda, so as to speed up the solution of cob problems.As more and more display enterprises join the R & D and production of cob display, we believe that it is only a matter of time before cob display develops rapidly. It is expected that cob may develop rapidly like small spacing in the next three to five years. Whether cob display can become another leader in the development of LED display industry remains to be seen!

Cob encapsulated LED display screen has good appearance, excellent image quality and strong protection. All these characteristics are attributed to its packaging method cob.Cob packaging is to directly package the light-emitting chip on the PCB. The packaging process flow of a cob display screen is as follows: cleaning PCB --- dropping adhesive --- chip bonding --- testing --- sealing black adhesive heating and curing --- testing --- warehousing1. Cleaning PCB board: cleaning the board is to improve the quality of bonding. There are stains or oxide layers on the cleaned PCB board. After testing and positioning, clean it with a brush or air gun before moving to the next process;2. Drop adhesive: two methods are usually used for adhesive connection, one is pressure injection, the other is needle transfer;Pressure injection method: fill the glue into the container, apply air pressure and control the injection diameter.Needle transfer: a rapid dispensing method. Take out the glue from the container with a needle and apply it on the PCB board;The purpose of dropping adhesive is to prevent the chip from falling off during bonding.3. Chip pasting: chip pasting is also called solid crystal. This process requires preciseness and must be "stable and positive". Note that the chip cannot be pasted reversely;4. Bond line: the purpose of bond line is to link electrical and mechanical. Each company does different tensile tests, which can be carried out according to the company's standards. Handle the bonding line with care, and assign special personnel to check its correctness every two hours;5. Glue sealing: during the glue sealing process, check whether there is silk dew during dispensing, whether there are pores on the surface, and whether the black glue is cured. Packaging has strict requirements for technicians, and the process must be strictly controlled;6. Testing: undesirable phenomena may occur in the binding process and are not easy to be found, so chip level packaging should be tested for performance; There are two ways of detection: non-contact and contact.Non contact inspection is mainly visual inspection, which is also the basic inspection technology that cob technicians must master. However, whether it is non-contact or contact, the two should be complementary rather than alternative.lw

Cob display is not commonly used at present because of the high price. But at present, there are many bidding projects that need cob display. Do you know the effect of cob display? Cob display manufacturers to show the following:The dot spacing of cob display screen is very small. Unlike the physical limitations of SMD packaging, cob packaging can easily achieve ultra-small dot spacing, so cob display screen is better in display. In addition, the cob display screen is a COB package, which completely seals the device on the PCB board and then solidifies it with epoxy resin adhesive. The plane is smooth and does not drop the lamp, and the product has strong reliability. Moreover, because the cob display screen has been improved many times, the screen is Microsoft elegant black, the ink consistency problem has been perfectly displayed, and the appearance is atmospheric.Let's take a look at the display effect of cob display:This is the 4kcob display screen we exhibited at Infocomm in Beijing. The screen area is 4.8 * 2.7 and the model is 0.9. The materials are processed in 3D. In addition to 3D realism, the picture is extremely rich in color and extremely clear. It is difficult to notice the graininess of the LED display screen itself when viewed from a close distance (within 1 meter). The on-site effect is great. Viewing users take photos and records one after another, The cob display also has a very good point: it can effectively suppress the moire pattern, so there will be no stripes during the shooting process, and the user experience is good.In addition to cob0.9 large screen, we also exhibited a series of cabinet displays of cob models in this Beijing exhibition, cob0.8-1.9. However, due to the certain distance between the shooting process and the screen body, no obvious effect can be seen. If you watch on site, the display effects are a little different due to different models. However, it can be seen from the whole that the display effect is very brilliant due to the small spacing of cob.fqj

LED display and cob display, which have been talked about for a long time, I believe many people think they are two different products if they are not insiders. In fact, cob display screen is also called cob LED display screen, which is also led display screen. However, in the past, SMD packaging was commonly used for LED display screen, so everyone directly called SMD packaged LED display screen as LED display screen, and cob display screen is a new LED display screen encapsulated by cob. In contrast, the two packaging methods are different.What are the advantages and disadvantages of SMD and cob in the display?In terms of manufacturing cost: SMD has expensive raw materials, many production processes and high production cost; In terms of SMD production process, cob eliminates the concept of support and has no production processes such as electroplating, patch and reflow welding. The process is reduced by one third and the production cost is reduced;Product reliability: according to the reliability principle, the fewer control links of a product, the higher the reliability. Therefore, the LED display screen encapsulated by cob is more reliable;Optical electricity: SMD package pastes LED lights on PCB board one by one, so it will certainly lead to high and low, resulting in uneven light spot, while COB package adopts dispensing method to package the light-emitting chip on the same horizontal plane, making the illuminated light spot more uniform; And cob has good color consistency, angle of view close to 175 , and good color mixing effect, which are the advantages that SMD dot matrix cannot surpass.Light quality: SMD packaging method pastes multiple discrete devices on PCB board. This method has the problems of point, glare and ghosting. However, cob is an integrated package and emits light from an area light source. It not only has a large viewing angle, but also reduces light refraction;In general, the visual effect of cob encapsulated LED display is better than that of SMD encapsulated LED display, regardless of the viewing angle and luminous effect. In addition, the cob display screen completely encloses the device on the PCB, so it is also superior to the SMD LED display screen in terms of protection. It can be seen intuitively that the cob display screen will not have bad phenomena such as falling lights and bad lights in the process of transportation, installation and disassembly; If you have any questions about cob display, you can contact the cob display manufacturer - Shenzhen Dayuan.fqj

Cob display, designed for ultra micro dot spacing. Cob display manufacturer - Dayuan intelligent, which can cooperate with various bidding, tendering and bidding.Cob display screen has entered the promotion period at this stage. Due to its superior characteristics and the difficulty of production, cob display screen is mostly used for bidding and bid control.Cob display screen is favored by the bidding project. First, the display screen has high price and high project amount. Second, the display screen has high display accuracy and strong display stability, and is more suitable for high-end occasions. However, because there are few manufacturers that can produce cob display screen, we also need to be cautious in the selection.1. The production process of cob display screen is less than that of SMD packaging. When it is popularized later, the production cost and product price will be reduced;2. The reliability of cob display screen is stronger. Due to the characteristics of cob packaging, the device is completely closed and there will be no lamp drop, which will improve the viscosity of users to a great extent. Because even at this stage, even if the LED display screen often has small defects of light loss, users will also choose LED display screen. If the criticism of light loss can be solved from the root, it will certainly improve users' favor;3. Ultra micro dot spacing: the user's display demand for LED display screen will not stop, and will continue to require more precise display, because LED display screen is made of LED lamp beads, there will be gaps between lamp beads, and the user's requirements for reduction will continue to strengthen, just like from P30 to p0.9 now and then to P0.1 later. It is unrealistic to rely on SMD packaging technology, Because SMD is almost at a standstill when the distance between points is 1mm, let alone 0.6, let alone 0.1. But cob encapsulation can.Therefore, generally speaking, the trend of cob display screen industry is steadily upward. The past few years belong to the SMD era, because at that time, full-color LED displays were used more outdoors, but the impact of small LED spacing on indoor occasions, shopping malls, studios, command centers, etc. in the future, LED displays will be more and more used in indoor high-end occasions and slowly replace other display carriers.fqj

There are several kinds of splicing screens, and LED display screen is one of them. Cob display screen is one of the LED display screen series products. The spliced display screen makes the display screen clearer and more delicate, and the color is softer and more beautiful.What is unacceptable about the splicing screen is the obvious splicing. The existence of splicing will affect the display screen, resulting in the disharmony of the screen and the linear decline of user experience. Therefore, under many materials, the splicing of LED display screen is ideal. If the splicing seam is 0.1 and close to 0, the overall display screen fits perfectly.What are the advantages of cob display splicing, one of the LED display product series?Cob display screen was born when SMD packaging was difficult to drill down with a smaller spacing. One of the characteristics is that the spacing can easily achieve a point spacing smaller than that of LED. Secondly, the packaging method is different. Cob packaging directly encapsulates the light-emitting chip on the PCB board and is bonded with epoxy resin, so that the device is not exposed and has stronger protection. Therefore, the large screen spliced by cob display has the following characteristics:1. The flatness of the screen body is higher and the screen surface is smoother;2. The display screen is clearer, the color is more beautiful, and there is no sense of particles at a close distance;3. Stronger heat dissipation capacity, no heat accumulation;4. The product has stronger protective performance and is not afraid of damage;5. Get rid of point light and area light, and the light quality is better;At present, there are few manufacturers of cob splicing screen, which has high entry requirements and difficult enterprise transformation... And for the same model, the price of cob display screen will be 10-20% higher than that of SMD encapsulated led with small spacing. For questions about cob splicing screen, you can contact the cob splicing screen manufacturer - Shenzhen Dayuan, and we will give you a better reply.fqj

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.