TWI229224B - Light guide plate capable of supporting image displaying module of liquid crystal display - Google Patents

Abstract

Disclosed is a light guide plate that is capable of supporting an image displaying module of a liquid crystal display. The light guide plate includes at least a plate structure and a support structure. The plate structure has an upper surface serving as light transmitting face from which lights reflected inside the plate structure are emitted. The support structure is located on a circumference of the light transmitting face of the plate structure and extends upwards from the light transmitting face for supporting the image displaying module above the light guide plate, wherein a cavity is formed between the plate structure and the image displaying module to receive therein a light enhancer plate module that enhances uniform distribution and brightness of light transmitting through the light transmitting face.

Description

1229224

Field of the invention: The right M of the present invention, the supporting structure γ liquid called the second plate, is particularly related to a light-guide plate that can be placed in the imaging mode II; an image module, so that the light-increasing film module is particularly on the upper surface. Between spaces. Background of the invention: Point, = Equipped with thin, thin, power-saving, and no-brightness rays, etc .; I :: Spoon applied to personal digital assistant (PDA), notebook computer plus purple: machine, video recording Phones, mobile phones and other electronic products. Actively investing in R & D and adopting large-scale production equipment, the quality of Nichi Display 11 continues to improve and the price continues to drop $. Due to these two factors, the application fields of liquid crystal displays have rapidly expanded. 、 Yueduo ..., Brother Picture This picture shows the configuration side view of the existing LCD display. As shown in the figure, the liquid crystal display 20 includes a display module 22, a brightness enhancement module 24, a backlight module 27, and a frame 32. Among them, the backlight module 27 includes a light guide plate 26, a reflection plate (located below the light guide plate 26, not shown in the figure), a lamp tube 28, and a reflection cover 30. The light guide plate 26 is composed of an acrylic plate, and a particle pattern is defined on the lower surface of the light guide plate 26 as a diffusion point 34 for scattering light. The lamp tube 28 located at the side of the light guide plate 26 can transmit light into the light guide plate 26 by means of edge light, and the reflection cover 30 located outside the lamp tube 28 can be used.

1229224

, The light and the radiation are radiated from the opening of the reflector. The light entering the light guide plate 26 is transmitted to the other end of the light guide plate 以 in a total reflection manner. When part of the light exits the light guide plate, it is located at | 9 β τ ±. << τ, i, the reflective plate on the lower surface 36 of the iso-light plate 26 will reflect the light back, and use the diffusion point 34 to diffuse the reflected light to various angles, and the light-emitting surface 38 of the light guide plate 26 (the upper surface of the light guide plate) ) Eject 0 Please continue to refer to the first figure, a light-enhancing sheet module 24 with several layers is fabricated on the upper side of the light guide plate 26. In the conventional art, according to different functions, the light-enhancing film module 24 can be divided into an upper diffuser 24a, a brightness enhanced fUm (BEF) 24b, and a lower diffuser 24c. Its main function is to scatter the light emitted upward from the light guide plate 26, and make the distribution more uniform and enhance the brightness. As for the display module 22, it includes an upper substrate 22a having one of red, blue, and green color filter films (cololflter), a lower substrate 22c having one thin film transistor (TFT), and A liquid crystal molecular layer 22b sandwiched between these two layers. An electrode is formed between the upper and lower substrates and the liquid crystal molecular layer 22b (not shown). When there is a difference in potential between the two electrodes, the alignment direction of the liquid crystal molecules will change, which will cause the light transmitted from the light enhancement module module 24 and incident on the imaging module 22 to be polarized (p 〇1 ar丨 zed) The direction and intensity also change accordingly to form an image with light and dark and gray scale changes on the display. Still refer to the first picture. Frame 32 is a support with a stepped plate

1229224 V. Description of the invention (3) The structure ′ supports the light guide plate 26, the light-increasing film module 24 and the display module 2 2 ′ in order from the bottom to the top to fix and support the three-layer module. However, it is worth noting that after this liquid is not assembled for the day, it will be subjected to a reliability test to ensure that the display is still under different conditions (such as temperature, humidity, bias, etc.). Can maintain a certain quality. Generally speaking, these reliability tests include high temperature storage tests, low temperature storage tests, thermal shock tests, temperature cycling tests, and high temperature and high humidity bias voltages. (temperature and humidity with bias (THB) test) In the ΐίΚΪ reliability test (such as high temperature and high humidity bias test), the f, the f, and the gap (gap) between the light-enhancing film modules 24 are subject to the above system. When the light guide plate 26 expands due to moisture and heat, the module 24: at: Π ": upward expansion, and then squeezed to the light-increasing film frame 32: due to: 3 f module 24 thermal travel space is also squeezed At this time, Hejiaa prepared the display module 22 and the expanded light guide plate 26. Purpose and summary of the invention: The purpose of the present invention is to provide a display module capable of supporting a liquid crystal display 1229224. 5. Description of the invention (4) Light guide plate. Another purpose of this month is to provide a light guide plate that expands and squeezes to produce waves. The first film branch group is generated by a liquid crystal display without a light-increasing sheet module. The magic liquid crystal contains a light tube, a light guide plate and a display line. The light guide plate has a light guide plate, and the light emitted by the tube is reflected by the side end of the light guide plate, and the edge emitted from the upper surface of the light guide plate will form a light guide. The surface weight group of the light plate is formed by a cavity between the upper surface of the above-mentioned support structure. Therefore, when the light guide plate is exposed to high temperature and high humidity to avoid the light guide plate module from being received by the light guide plate, the present invention discloses an avoidable display structure. This structure includes at least an image module. The lamp tube is used to provide a light surface and a light guide plate side end. After the lamp enters, it exits multiple times along the inside. Among them, the upper surface of the light guide plate is supported upward. Structure. The display frame is supported, and when the development module and the light guide module are placed in the cavity to generate% teng, the cavity can be squeezed to cause warping. Detailed description of the invention. And '; month, for a light guide and a supportable liquid crystal display display module light guide and = image to = = so that a light-enhancing film module can be placed on the light guide plate ... see below when the expansion and deformation occur, can avoid light increase The film module received ^ 1229224 Description of the invention (5) Light: Warping caused by squeezing. In addition, because of the bracket; the display module 'traditionally uses a stepped plate frame; ί = the frame can be further advanced-the step is saved, so that Liquid crystal display; = small. The detailed description of the present invention is shown below. Picture 2 of the picture of the younger brother in winter and May, this picture is shown + 7 The first module 50. The components of the backlight module 50 include a plate 5 2, a reflecting plate 54, a lamp tube 56, and a reflecting cover 58. In i, = 52 ^ a surface of a light guide plate 60. (Square) and a guide wire side end. The V-light plate 52 has a square shape when used in a display and a wedge shape in a notebook computer to save space. After the light emitted by the lamp tube 56 is reflected multiple times along the inside of the light guide plate 52, it will eventually be evenly emitted from the surface 60 of the light guide plate. Generally speaking, the light guide plate 52 is made of acrylic material, and defines a circle on the lower surface of the light guide plate 52 by screen printing (SC reen) or direct injection molding. Shaped, /, angular, or square particle pattern (dot). Since these particle patterns are made of a material with high reflectivity and do not absorb light (for example, titanium dioxide or barium sulfate), they are diffusion points that can scatter light. The lamp tube 5 6 is located at one side end 6 2 of the light guide plate 5 2, and the lamp tube 5 6 illuminates light into the light guide plate 5 2 by way of end face illumination, and causes the light to follow the light guide plate 5 2 Performs total reflection and conducts to the other side. When the light hits the diffusion point 64 located on the lower surface of the light guide plate 52, the reflected light diffuses at various angles and exits from the upper surface 60 of the light guide plate. Generally speaking, this light tube 56

Page 8 1229224 Description of the invention (6) It can be composed of a cathode tube (cathocie lamp) with a diameter of about several centimeters. A reflector 5 8 is provided on the outer side of the lamp tube 5 6. The reflector 5 8 has a C-shaped opening, (not numbered). The light from the lamp tube 56 is reflected by the reflection cover 58 and then emitted from the C ^ open # port, and enters the light guide plate 52 to increase the ratio of the light entering the V light plate 52 from the side end 62. In addition, the reflection plate 54 is installed on the lower side of the light guide plate 52 so as to reflect the light emitted from the lower surface of the light guide plate 52 back to the light guide plate 52 to increase the efficiency of light use. It is worth noting that the display module above the support plate 52 protruding upward on the surface 60 of the light guide plate (the support structure 66 is not shown) is an implementation of two light guide plates opposite the lamp tube 56 and the reflection cover 58 In the example, the support structure 66 is provided in addition to the three edges of the lamp tube 56 and the reflection cover 58 (as shown in the second figure 68, which is the three horizontally lying rectangular columns described above). 60 edges can also be on the other three edge structures 66. As for the supporting structure 66 forming the light guide plate 5 2 plate structure. That is, the same material 66 can be used on the light guide plate by integrally forming the light plate 5 2 plate structure. The edge of the upper surface 60 of the 52-plate structure is further provided with a guide support structure 66 for supporting the light guide (shown in this figure). In one embodiment, the horizontally-shaped rectangular columns are positioned adjacent to the upper surface 60 respectively. On the two edges of the light. On the other two horizontally lying rectangular columns, and the other side of the light guide plate on one side of the other 60). Referring to the third figure, the supporting structure 66 formed by the display module is supported by the supporting structure 66. The upper edge of the light guide plate on the side of the shooting cover 58 constitutes a connected door, which is made in the shape of a support. In a preferred embodiment, at the same time, the support structure 66, which is made in one piece, is made integrally. In another embodiment, after the supporting structure is completed, it is fabricated on the surface of the light guide plate 1229224 V. The edge of the invention description (7) 60. In this way, the plate 52 is made of different materials. The supporting structure is made 66 has a support structure 66 with a light guide, and is supported by a color filter film upper substrate 68 &amp;, _ ", a member image 68, a crystal layer 68b, a lower electrode (from the top : It consists of an upper electrode (not shown), a liquid 68c. ",, no" and a thin film transistor lower substrate. Please refer to the fourth figure, this structure cutaway. As shown, at 68 o'clock in the guide The surface of the light plate μ and 70. The cavity 70 can be used to make the fifth as described above, and the light distribution from the light enhancement module 7 2 72a, the light enhancement film 72b, and the lower diffusion surface is more uniform as the imaging module 68 The arrangement direction of power on and power off will change. The light and its polar poles also change to produce an image with the upper 0. The figure is the QQ along the line in the third figure. The support structure 6 6 is used to support the development structure. A cavity is formed between the development structures 68. The light-increasing sheet module 72 is inserted. An upper diffusion sheet 72c ′ is sequentially included from top to bottom to uniformize the light guide plate 52 and enhance the brightness. When a potential difference occurs between the electrodes, the liquid crystal molecules are formed by the light-increasing sheet. The image transmitted by the module 72 and the polarized direction and intensity of the dark and gray-scale changes are displayed on the display in May. Refer to the second figure 'The liquid crystal display of the present invention further includes an l-shaped frame 74, this L-shaped Frame 7 4 is used to protect the above-mentioned backlight film set 5 0, 1229224

The light enhancement film module 72 and the display module 68. In another embodiment, since the module 68 is made of a support located on the edge of the light guide plate 6 ◦ edge for 6 years, and the light enhancement module 72 is also directly placed on the light guide plate 52, the cavity 70 between the symbols' Therefore, this L-shaped frame 74 can be omitted. ”Compared with the traditional liquid crystal display device, the image module has the following advantages: 'The night crystal display provided by the present invention (1) Because the L-shaped frame can be selectively omitted, the crystal display can be thinner, lighter and shorter. . F ® liquid (2) After the production of the liquid crystal display is completed, it will be subjected to a reliable production test. In some of the more severe reliability tests (such as: high temperature and high X pressure 1), when the light guide plate due to temperature and humidity When the expansion occurs due to the change, the supporting structure of the same material as the test result will also expand the board as the light guide plate expands, plus the imaging module located above the support structure = limit °. The expansion ratio, so the size of the cavity between the surface of the light guide plate and the display module will not change much. In this way, it is located in the cavity; ^ The light sheet module will not be squeezed by the expanded light guide plate ^ = 增 ΠΛ. Surface. (3) Since the supporting structure can be formed as a whole when manufacturing the light guide plate, no additional process steps are required. &Quot; ^ (4) In another embodiment, because It can also omit the l-shaped frame, which can reduce the process cost. '' Because the present invention is exemplified as above with a better example, it is not intended to limit 1229224 V. Description of the invention (9) The spirit of the invention and the entity of the invention are limited to the above-mentioned embodiments. Therefore, without departing from the scope of the present invention, Modifications made within the spirit and scope should be included in the scope of patent application below. I_ _ Page 12 1229224 Schematic illustration By the following detailed description combined with the attached drawings, the above content and The many advantages of this invention are as follows: the first figure is a side view of a liquid crystal display configuration made according to the traditional technology; the second figure is a side view of a backlight module of a liquid crystal display made according to the present invention; A side view of a liquid crystal display configuration; a fourth view is a cross-sectional view of a liquid crystal display configuration made in accordance with the present invention; and a fifth view is a cross-sectional view of a brightness enhancement module module used in accordance with the present invention. Display module 22a upper substrate 22b liquid crystal molecular layer 22c lower substrate 24 light enhancing sheet module 24a upper diffusion sheet 24b light enhancing sheet 24c lower diffusion sheet 26 Light guide plate 27 Display module 28 Light tube 30 Reflector cover 32 Frame 34 Diffusion point 36 Lower surface 38 Light emitting surface 50 Backlight module 52 Light guide plate 54 Reflective plate

1229224 Brief description of the drawings 56 lamp tube 6 0 light guide plate 64 diffusion point 6 8 display module 6 8b liquid crystal layer 7 0 cavity 72a upper diffuser 72c lower diffuser 58 reflection cover 6 2 light guide plate side end 6 6 Supporting structure 6 8 a Color phosphor film upper substrate 6 8 c Thin film transistor lower substrate 72 Enhancer module 72b Enhancer 74 L frame

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Claims (1)

1229224 6. The scope of the patent application 8 light guide plates, in which the supporting structure is three and has an unconnected π gate π shape. 9 · If you apply for a patent, a horizontally lying rectangular column, a light guide plate of the item, where the supporting structure is a three-door to one connected "door" font. 10.-A light guide plate, including at least: ~ side ends, It is used to make 太: Taizhi board, and the light along Λ = born inside the bean enters the light guide from the side-屮 :: multiple reflections into the 仃; the reflected light from the out; the upper surface, Used to make the structure of the multiple branches, from the light = side :: raised, with, a space between the modules to form an imaging module, and the light emitting surface and the display 11. If the patent is applied for Scope 第 皮 Φ 兮 #Li Zhishihuai Two opposite horizontally lying rectangular pillars. Zhenzhi ¥ Xianban, of which δ Haizhi is structured according to the structure as follows: ': Hengshen lying please ask for a long prescription? Around the 10th item In the light guide plate, the supporting knot, the ° -pillar, and an unconnected π gate &quot; font. Σ, the pillar, and a connected π-gate &quot; font. Page 16 1229224 VI. Scope of patent application 1 4. An LCD includes at least: a light guide plate having a plate structure and a supporting structure protruding upward from the upper surface edge of the plate structure; a display module A group is placed above the light guide plate and supported by the supporting structure, so that a cavity is formed between the display module and the plate structure; and a light-increasing film module is placed in the cavity . 15. The liquid crystal display according to item 14 of the scope of patent application, wherein the supporting structure is integrally formed with the plate structure. 16. The liquid crystal display according to item 14 of the patent application scope, wherein the supporting structure and the plate structure are made of the same material. 17. The liquid crystal display according to item 14 of the scope of patent application, wherein the supporting structure is formed on the edge of the upper surface of the plate structure after the plate structure is formed. 1 8. The liquid crystal display according to item 14 of the patent application scope, wherein the supporting structure and the plate structure are made of different materials. 19 · The liquid crystal display of item 14 in the scope of patent application, wherein the supporting structure is two opposite horizontally lying rectangular columns. Page 17 1229224 VI. Application for patent scope 2 (For example, the liquid crystal display of item 14 in the scope of patent application, wherein the support structure is three horizontally lying rectangular columns, and it is an unconnected "door π shape. 2 1. The liquid crystal display according to item 14 of the scope of patent application, wherein the supporting structure is three horizontally lying rectangular columns, and is in a connected "door" shape. 2 2. The liquid crystal display according to item 14 of the patent application scope, wherein when light is incident from the side end of the light guide plate, it will be reflected multiple times along the inside of the light guide plate, and will be emitted from the upper surface of the plate structure. 2 3. The liquid crystal display according to item 14 of the scope of patent application, wherein the light-increasing sheet module is used to make the light emitted from the upper surface of the plate structure more evenly distributed and have a more southern bone. 2 4. The liquid crystal display according to item 14 of the scope of patent application, wherein when the light guide plate expands due to high temperature and humidity, the support structure and the plate structure will expand at the same time, and the display module is placed in the Above the light guide plate, the size variation of the cavity is restricted, and the light-increasing sheet module is prevented from being warped by the expansion and compression of the light guide plate. Page 18