Flat backlight system
Left and right, thus, the flat backlight is turned over, and the development speed of the product is very fast. In addition, the industry has placed great expectations on the application of the bamboo lighting system in your 1 PCT and 3 mobile communication system terminal equipment, and This piece is expected to be the fastest growing market in the future for flat panel backlighting systems. The application of flat panel backlight system products can only be pushed to all electronic audio and video systems using 0, such as electric 0,0 e-book mobile phone 88 machine stock machine; likewise, the electronic image system Teng He without 10 Song Nan, senior engineer. Engaged in the development of optoelectronic flat panel display technology.
Tian Mingjun male, engineer, born in 1965 1 graduated from the University of Electronic Science and Technology of China, majoring in applied electronics technology, mainly engaged in the application of flat panel display, and more and more, such as the physical projector product booth flat light-emitting display card ultra-thin luminous portrait 16 hand electronic 抨 calculator credit card machine lighting clock and other products. It is believed that as the scope of application becomes more and more wide, the speed of development will accelerate. As a production line for backlighting systems for large LCD monitors, it can be seen from the recent developments in Korea and Taiwan, that large manufacturers are increasing their investment. The strength, in succession, has created a number of human-type production lines, such as Taiwan's people, Yike Technology Co., Ltd. invested in the construction of backlight manufacturing, factory. In June 2000, the construction was completed, and mass production began in August. In that year, it reached 100,000 sets of large-scale liquid crystal display backlighting systems with a monthly production capacity of 121 or more. The target design of the production capacity of the plant is to reach a monthly output of 40 in 2 years. A set of backlighting systems for large LCD displays can be used for their scale and related market prospects.
2 kinds of flat panel backlighting system types and structures There are many types of flat panel backlighting systems. At present, there is no unified classification method. Generally speaking, there are a variety of classification methods according to the way of light source propagation, which can be basically divided into reflective planar and light guiding; the first is divided according to the nature of the light source, which can be basically divided into electroluminescent emitters. Type cold cathode lamp type hot cathode lamp type flat lamp type; the first is a comprehensive classification method that takes into consideration the nature of the illumination source and the mode of light source propagation, and 2 is the classification of felt water for the flatbed backlight system according to the comprehensive classification method. Hot cathode tube type and flat type fluorescent lamp type are currently used less, so they are not refined in 2, and the following related types are also only mentioned in the previous type.
Powder electro-induced r-plate bamboo lighting system electric hair-type! Light-emitting diode type 1 cold cathode lamp type 01 electroluminescence, side light-emitting diode type. 0 bottom light-emitting diode type 10 side light guide plate type 1 reflective straight down containing multi-tube and shape bamboo 1 hot cathode lamp type slightly 21 electroluminescent backlight system electroluminescence 7, backlighting system, by ten points . The town 0Light Insulator is flat. Plus the structure is simple. Therefore, in a variety of devices, the electroluminescence backlighting system is widely used, and it can be divided into two types: powder electroluminescence and organic electroluminescence. The basic structure of the powder electroluminescent screen can be 3 in powder electroluminescence. In the screen, the organic dispersion form is used, and the work light powder is not uniformly dispersed in the machine medium. And sandwich its tasu1ator Lightlayer Cathode between the transparent electrode and the back drain. It is illuminated by a strong electric field of alternating current or pulse to prevent moisture. Some of the screen synthetic resin a3 is covered, and the light body particles are also treated as a film type. The thickness of the package type electroluminescent screen is 1. The thickness of the envelope type electroluminescent city is 3, and a planar illuminant having a uniform brightness distribution can be formed.
The organic electroluminescent device is usually provided with a layer of an organic light-emitting layer, a hole transporting layer, a transparent anode glass substrate or an organic transparent substrate 1. The cathode is used to easily release electrons.
For alloys and anodes, a transparent PCT film is used. The substrate-like glass also has a transparent plastic substrate. The connection between the electron transport and the hole transport layer is critical, and its quality will directly affect the luminous efficiency of the device. It can be seen from the structure that the organic electroluminescent layer is driven by the basic structure of the organic electroluminescent panel. The backlight system of the system illuminating pole tube can be divided into two structures: bottom illuminating and side illuminating. 5 is the bottom illuminating type. The bottom illuminating LEU backlighting system is composed of multiple The LED core is evenly arranged on the bottom plate, and the power is supplied through the loop. The 0-die emits light, and through the common control function of the transparent silica gel, the reflective cavity and the diffusion film, a bright and uniform planar light-emitting effect is obtained, but the bottom-emitting type, The thickness of the backlight system is slightly LEDbackKghting. The backlight system is arranged by a plurality of 10 chips, forming a line source on the side of the light guide, one side and two sides, 10 chips. The light emitted by the row is reflected and refracted by the light guide and the diffusion film to finally form a uniform light-emitting surface, which also has high brightness, and the illumination effect of uniform surface illumination is currently uniform. The efficient side-light 10 backlighting system has better illumination than the conventional bottom-illuminated 0 backlight system, which is better in terms of power consumption and uniformity, especially the thickness of the latter. Advantages, as said, the thickness of the side light 0 backlight system is 153.5, 1 2.3 cold cathode lamps. Backlighting system Cold cathode lamp 01 backlight illumination system can be divided into reflective and side-guided two-reflex type cold-called pole lamp 矜01 backlighting system backlight backlight system structure can always be seen. The structure is to arrange a plurality of cold cathode fluorescent tubes, and the reflecting plate at the bottom and back is similar to the lighting box used for viewing, optical film and photographic film, because it can obtain better light source utilization, high brightness and simple structure, so Used for initial color, backlighting. Now still used for outdoor needs, such as high-brightness automotive color and high-brightness aircraft 17 Ding 81 stations in order to make the brightness distribution uniform in the structure is difficult to achieve thinning, actually the light source has been used and the shape of the lamp It has replaced many lamps, but the recent usage is getting less and less.
Side-guided cold-cathode lamp, the cap is completely 庹 飨 飨 飨 娼 娼 æ°æ„• æ°æ„• æ°æ„• æ°æ„• æ°æ„• æ°æ„• æ°æ„• æ°æ„• æ°æ„• æ°æ„• æ°æ„• æ°æ„• 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本 基本Scattering and shooting on the system surface; in order to reuse the scattered light leaking on the reverse side, a reflecting plate is provided, and a diffusing plate is provided to alleviate the bright spot to increase the front luminous intensity. , the addition of the prism plate; this way the bamboo light illumination system meets the thin type requirements. A high-level uniform planar light source can be obtained. Almost all notebooks, and all kinds of fire type, never use this kind of backlight system, this backlight system has become the mainstream product of backlight system in large LCD display.
3 side light guide type, backlight illumination system greatly increased LCD display small 1 backlight system is the main market for flat panel backlight system. In the meantime, it is the market of liquid crystal display devices. At this stage, desktop LCD displays are also rapidly emerging. Its market volume and potential are also very large. From the perspective of development, when the large-scale liquid crystal display TFTLCD was developed, the side-guided single-bamboo 1 edge-lighting system for direct use of multiple fluorescent lamps was used. The thickness is 35 and the edge is about 104, and the power consumption is about 1 Jia Zuo. Because the side light guide backlight system can fully meet the requirements of the portable frame, the slim frame is ultra-thin, light weight and low power consumption, so it has become The preferred accessory in large LCD monitors for portable devices is widely used in notebooks, 0 and other similar products.
Now, the structure of the side-lighting type 1 bamboo lighting system and the technical trend of the main components in the liquid crystal anvil are briefly introduced. It can be seen from 7 that in order to reduce the weight and place the liquid crystal display driving circuit, the light guide plate wave made of the organic resin village material is formed into a wedge shape; the high back elbow rate concentrating plate makes the light concentrated in the light guide plate; The reverse side of printing 1 can make light, the point of shooting. The distribution density from the incident portion to the end of the plate is sparse to a dense gradient distribution, thereby obtaining a uniform brightness distribution; together with the reflector diffusion plate and the prism plate of the surface, together to control and improve the brightness and uniformity of the front side of the light source 3.1 cold cathode fluorescent lamp 0 side light-guided backlight system used in the linear cold cathode fluorescent lamp, the diameter from the early 3.6, to today's 1.6 diameter 2 is its mainstream product, in the recent ultra-thin production; There are also the use of 1.8 to achieve thin tube not only to save space, but also to improve the efficiency of the effect, 1 re-environment 1 changed to 2.61 can be lifted, 2 off efficiency; but from the current point of view, the diameter is 1.8 The efficiency has reached saturation. In addition, the refinement of the pipe diameter also adds a lot of difficulties to the manufacturing process. Cold cathode fluorescent lamps usually use tens of 1 out of the inverter circuit to reduce the cathode electrode loss by high frequency opening, and the cathode electrode loss is about cold. The power of the cathode fluorescent lamp is 13 or more. Therefore, in order to improve the efficiency, the selection of the electrode material structure and the related electronic powder ratio and coating should be thoroughly studied. Similarly, in the selection of the material of the fluorescent material, the density of the coated particles, and the gas to be sealed can also be improved. 3.2 The incident optical system and the light guide plate can be seen from the light of the light pipe through the concentrating plate. After the light is incident on the light guide plate, in order to more effectively emit the light emitted from the lamp into the light guide plate, it is preferable to make the entrance portion of the light guide plate thick and make a large concentrating plate, thereby reducing the light pipe itself. The light-darkness conflicts with the thin body frame requirements and cannot achieve the ideal diameter of the collecting optical system. The light guide plate is formed by forming a high refractive index organic resin, and the light guide is performed by total reflection; the lower light scatterer is used Screen-printed 1001 to 1 white time-shaped honeycomb or square shape; the design of the aperture point to be densely distributed must take into account the concentration of the side of the light guide and the distribution of the brightness of the lamp, etc. It is currently more advanced to obtain a uniform brightness distribution, and your design method is to deduct the analog light path analysis simulation. After that, the test was carried out through a number of tests, and finally the juice setting scheme of Weiye Chemical Production was finally recorded; the most advanced is to design a small convex and concave spot on the light guide plate to replace the scatterer spot shape printed on the reverse side, due to This is formed while the light guide plate is being formed, so that a printing process is not required, and the cost can be improved.
3.3 Prism plate The prism plate is placed on top of the diffuser plate. As a lenticular lens, the illumination light can be concentrated and qualitatively given. In order to improve the brightness of the front side of the surface light source is practical. Usually only the syllabus is to be visible, and the face is right. Therefore, the method of multi-collecting and adding the prism plate to achieve the purpose of achieving higher brightness with the light-passing anvil is made of polyester film and polycarbonate, and the degree is 15230, 1 is 24, and each manufacturer's The design is different and there are many different types. Generally speaking, the single-sided prism plate can improve the surface light-emitting brightness of the light source by about 1.6 times, and the two prism plates can be properly arranged, so that the surface light-emitting brightness of the light source can be improved by more than 2 times. According to relevant information, in the formation of the light guide plate, The technology of forming the rafts has been put into practical use. Steps to lower the price of 6 can be put into production in the large, small system backlighting system status is + will be shaken, but must be progressively thinner, lighter, lower power consumption, especially low power consumption, at this stage is All research and development departments and manufacturers are most concerned about the system can not be with the notebook, the South 嗤 嗤 匦氪 hard, hard core copy of the lip, zinc, (9) 谄渌, the application of the preparation is also so dark and targeted production and development 4 Conclusion From the international and domestic situation, the backlighting system is moving toward a larger illumination area, the overall shape is thinner, the illumination is brighter, the price is lower, the power consumption is smaller, and the manufacturing process is more simplified. In this direction and trend Under the impetus, the relevant manufacturers in the world have increased their investment in response to the needs of customers, so that the products have made great progress in the total amount of technology level and market development. In contrast, the domestic flat-panel backlight system manufacturers have a large difference in scale and grade compared with foreign manufacturers. I believe that with the increasing maturity of international flat-panel backlight system products and technologies, China’s backlighting system Technology and production will also develop rapidly. High-efficiency fine-diameter cold cathode fluorescent lamp for liquid crystal display backlight, 1 research. Optoelectronic technology, 19919164 2 Gao Jiujian. The low mouth has also become Taiwan's 0 to carry the Ding, Japan Qiao Li Gao Fu plus, value. 1 such as. 0, soil, 20006061 3 Morita and Shiki. The Yokohama area has a new 7-port extension, and the mobile phone uses 7-port 7 and looks forward to it. 1 this 10,200,5 4 Yaji Shun Taro. 1 Use thin and lightweight eve, element technology. 1Xun 8 Shen, 20004
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