TW571147B - Backlight for a liquid crystal display having high light-recycling efficiency - Google Patents

Abstract

A backlight for a liquid crystal display (LCD) employing light recycling. In one embodiment the backlight includes a light guide fabricated from a substantially non-absorptive material and a reflective layer fabricated from a highly reflective material. In another embodiment the backlight includes a light source, a bundle of optical fibers, and a reflective layer fabricated from a highly reflective material, wherein the bundle of optical fibers is configured to receive light from the light source and distribute it to the reflective layer.

Description

::: =-=: == Rights and Interests in National Temporary Patent Applications Backlighting ::: Related to liquid crystal display devices. In particular, a new LCD device that provides high brightness and efficiency is provided. In particular, it is a display that uses a light recycling mechanism to provide a brighter display effect. In the past 7 years, with the rapid development of computer technology and portable electronic appliances, the demand for liquid crystal displays (LCDs) has greatly increased. People even think that it will become the most promising technology for flat panel display appliances in the future. In summary, as shown in Fig. 1, a conventional LCD includes the following three basic components: ⑴-the backlight 10 can generate-a light with a uniform intensity of the sheet; (ii)-space: the electrical addressability of the degree modulation element Array 20, which is used to adjust the light transmitted through it and the shark, and (lii) which is registered in correspondence with the aforementioned spatial intensity modulation element array-absorptive color calender element array 30, which can be spectrally filtered and modulated. The intensity of the light comes to form a color image. ^ Hayueguang 10-pass system includes one or more light sources 1 (such as thin fluorescent tubes, etc.) 'a light guide 12, at least one diffusing element 13 is provided downstream of the light path of the light guide 12, and a high reflection (for example A white) film 14 is provided upstream of the light path of the light guide 12 and can be used to reflect light back into the display. The electrically addressable array 20 generally includes a linear polarizing film 21, a film layer 22 containing an addressing circuit (such as a thin film transistor (TFT), a capacitor, and a bus line, etc.), and a liquid crystal (LC) cavity 23, which is generally Was 90. Twisted nematic construction. The filter array 30 typically includes an absorptive color filter film 31, another linear polarizing film 32, and a paper size applicable to the Chinese National Standard (CNS) A4 specification (210X297 public love) 571147 A7 — _____B7_ V. Description of the invention (2) or a plurality of glass substrates 3 3 and the like. It is now known that one of the main disadvantages of this traditional LCD is the poor transmission efficiency of light (that is, what percentage of the light generated by the backlight 10 will be absorbed by the components of each LCD). The light efficiency of a typical conventional LCD panel is usually only about 5 to 10%. The light transmission efficiency of these conventional LCD panels is greatly reduced due to the following factors: (ii) the absorption type polarizing film will absorb light; (ii) the absorption type filter film will absorb light; (iii) reflected to the TFT and / or The light of the line is absorbed; (iv) the black matrix used to separate the sub-pixel filter absorbs the light; and (v) Fresnel caused by the mismatch of the refractive index between the film layers ) Loss and so on. Therefore, if an ultra-high-intensity backlight system is not used, it will be difficult to produce a very bright image from a conventional LCD panel. However, the super-strong backlight system requires a considerable power input and generates a large amount of heat. Recently, in US Patent No. 6,188,460 (hereinafter referred to as the Fari ^ patent), Fans discloses an LCD which uses a systematic light cycle design, which can reduce the loss of light energy in these conventional LCDs. The Farisi patent is incorporated herein by reference. In the disclosed light recycling method, the polarized light is sent from the backlight to a component in the LCD that generates spatial intensity modulation and spectral filtering. The light that is not sent to the display surface (ie, a viewer) will be reflected (rather than absorbed) back to the backlight along its projection axis for recycling, and then sent out by the backlight for the same and Adjacent sub-pixels are reused. The end result of this light cycling method is a brighter display, because it can convert a larger portion of the light into a user-friendly than the previously known systems. Although much improvement has been made in Faris's fortune, there is still a need for an improved method that can efficiently produce high-brightness color images. Special This paper size applies Chinese National Standard (CNS) A4 specification (21〇 × 297) (Please read the notes on the back before filling this page)

Less sexual

、? Γ— (Please read the precautions on the back before filling out this page) 571147 V. Description of the invention 疋 A backlight that can provide high-efficiency light recycling is required. In one aspect of the present invention, a backlight of an LCD using a light cycle is included. The backlight contains a light source; a light guide is made of a non-absorbing material. The metamaterial is selected from the group consisting of acrylic, polycarbonate, poly (fluorenyl-methacrylate), etc., wherein the light guide absorbs less than 5% of the reflected light energy incident thereon; and A reflective layer is made of a highly reflective material; the material is self-contained by a group consisting of Shao, silver, barium sulfate, hafnium oxide, and organic materials, where the reflective layer will impinge on it. Light energy is reflected to 95 / 〇. In another aspect, the present invention includes an LCD, an array including an electrical address system comprising a liquid crystal cavity, a non-absorptive phosphorescent array, a wideband polarizing layer, and the above-mentioned paragraphs. Backlight. In another aspect of the present invention, another embodiment of a backlight using light cycling to coffee is included. The backlight contains a light source, a bundle of optical fibers:-the upstream side of the light and the downstream side of the light, the fibers include a coating material, and-the reflective layer is made of a highly reflective material, the material is selected from Contains groups of Shao, silver, barium sulfate, oxide ball, and organic materials, etc., and can reflect at least 95% of the light energy incident on it. The optical fibers are further configured to receive light 'from the β light source and distribute the light to the reflective layer. In yet another aspect, the present invention includes an LCD that includes an electrically addressable array, a liquid crystal array, a non-absorptive filter array, a wideband polarizing layer, and the above paragraph. The backlight. In yet another aspect, the present invention includes a method for manufacturing an LCD backlight. The method includes: providing-light source, providing-reflective layer made of high-reflective material, and the material is selected from the group consisting of Ming, silver, and copper sulfate. This paper is compliant with the standard (r ^ 72K) X297S7 y / 1147 A7.

571147 V. Description of the invention (5) The backlight 70 of the invention includes a bundle of optical fibers 72 instead of a typical light guide. The beam-turning optical fiber can efficiently transmit the light emitted by the light source to the display. The backlight of the present invention is more excellent than the conventional technologies because it has very low loss, which is an important feature of high-efficiency light cycling. Another advantage of the present invention is that it can more fully achieve the light cycle return = benefit. Another advantage of the backlight of the present invention is that it can form an LCD with high brightness and high efficiency. The idea of the present invention is that when the light cycle method is used, a lot of unexpected light loss occurs in the backlight. The foregoing patents disclose that although an LCD panel has a theoretical light efficiency that has been significantly improved, it does not anticipate the light energy loss that may occur in the backlight. Such losses typically include light absorption in the various components of the backlight, and blisters at the edges and back. A typical backlight unit may lose up to 35% of the light incident thereon (e.g., light reflected by the light recycling member back into the backlight). The loss of this light energy is usually more exacerbated, because before the light is emitted by [CD] to display the information, it will pass through the backlight many times (because of its multiple reflections). For example, if the recovered light needs to pass through the backlight unit on average three times during the cycle, the accumulated loss in the backlight unit may reach 70% of the recovered light energy. Therefore, the losses in the backlight unit will eliminate a large part of the expected increase from LCDs using a light cycle system. Please refer to Figs. 2A and 2B, which shows-a backlight 10 'used for calculation, which outputs light with a brightness of 丨 0 (Fig. 2A), and an LCD 50 containing the backlight 10 people,', , Staff show state 40 (Figure 2B). The backlight 10 is only reflected by the display, paper size applies Chinese National Standard (CNS) A4 specifications (210X297 public love) 571147 A7 -----------___ 5. Description of the invention (6) " ~- : A part of the light 12 that is incident on it (that is, the light reflected by the display 40 back to the backlight). The total loss (i_r) in the backlight is the light absorption and leakage of light from the sides, ridges, and * faces. Generally, the r value is from 65 to 0.85. The sentinel values represent the reflectance disc transmittance of the display 40. The display 40 will reflect a part of the radon incident machine toward the backlight 10 and reflect it back. In a conventional LCD, the value of Γ is typically in the range of 0.001 to 400. In this setting, the output brightness of the display does not depend very much on the R value, and the display 40 and the backlight Multiple reflections between 10 and 10 will be ignored. Conversely, in the -light cycle system, its value may be between 0.5 and 0.7, so the brightness will become very sensitive to the value (that is, the loss in the backlight). In a calculation example, a conventional LCD is considered. Assume that in the light cycle calculation example, a conventional display is called .05. If the reflectivity of the backlight is changed from R = 0.85 to RKK65, Bei! It can be calculated that it will be reduced by less than 2%. In the other calculation example, consideration is given to the light cycle LCD. It is assumed that r = 0.67 in this example. If the backlight reflectance is changed from R = 0.85 to 65, it can be calculated that it will decrease by 23.5%. In the case of r = 0.85, 34 6% of the recoverable light is lost. If the moonlight reflectance is reduced to R = 0.065, 61 8% of the recoverable light is lost. Therefore, in comparison, if the backlight loss can be reduced to R = 0.95, only 13.6% of the recoverable light will be lost. The above example indicates that the brightness of a conventional LCD is substantially free from the reflection efficiency of the backlight. If the scale is reduced from 0.85 to 65, the light output will be reduced by less than 9, 2/0. Therefore, the need for a backlight with high reflection efficiency has not been recognized in the past. However, this second example is to verify that a system with a light cycle of 5 sheets applies the Chinese national standard IcNsT ^ specification (210X297 mm) ---------

May I (Please read the notes on the back before filling this page) 571147 A7 --- _B7____ 5. Description of the invention (7) The brightness of the designed LCD will be highly sensitive to the reflection efficiency r of the backlight. An LCD 'with a high reflection efficiency backlight and using a systemic light cycle design will have significantly improved light efficiency and brightness compared to conventional techniques. Please refer to FIG. 3, which shows a backlight 10, according to a first embodiment of the present invention. The backlight 10 "is similar to a conventional backlight 10 (Fig. 1), but its components have been modified to have minimal loss. In a generally required embodiment, the light 10" as a whole will reflect at least About 85% of the light energy incident on it. In a preferred embodiment, the backlight 10 "reflects at least about 95% of the incident light energy. In an embodiment, the light guide 12" may be made of a material that is almost non-absorptive, such as acrylic Acids, polycarbonates, polymethyl methacrylate (PMMA), and the like. Professionals will easily understand that the light guide 12 "can also be made of other non-absorptive materials. This is included within the spirit and scope of the present invention. Generally, the light guide 12" is required to absorb only less than 5% of the injection The reflected light energy thereon. In one embodiment, the light guide 12 "absorbs less than about p / 0 of the reflected light energy incident thereon. In another implementation, the light guide i2" absorbs less than about 0.5% of the light incident thereon. Reflected light energy. Reflective film 14 "may be made of any material that is capable of reflecting (preferably in a diffusing manner) a high percentage (eg at least about 95%) of the light energy incident thereon, such as a reflective silver or aluminum coating Layer, a diffusive white coating containing sulfuric acid locks (such as those used in white calibration standards), magnesium oxide (such as bonding materials), or organic materials such as Spectralon® (by Labsphere, North Sutton, NH) Produced or sold), or films such as

Melinex⑯ 329 (by DuPont de Wilimington, Delaware

Nemours company) and so on. Professionals will easily understand that this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 10 (Please read the precautions on the back before filling this page)

The invention can be made from other highly reflective materials. The material ΓΓ is based on the spirit and scope of the present invention. In the general embodiment of the example, the 4 radiations will reflect. At least about 98% of the light energy incident on it. Tests completed in the research and development of Ben Sheming show that the main loss in the current plume is due to the leakage of the backlight from the leakage of the color reflective film field yue. Thick moon b diffused materials, such as barium sulfate, greatly add up the reflection of the component. Γ is made by Saki sulfate, and the test results on the surface show that there is no reflectance of about 98.5%. See also Fig. 4 shows an optical fiber backlight 70 according to the present invention. The optical fiber backlight 71 includes a light source 7 and a bundle of optical fibers 72, and a highly reflective layer 14 ". The light source 71 may be a small white weave. Light or any other light source capable of producing a suitable white light-free. The backlight 70 may optionally include one or more lenses 1 to guide the light from the light source 71 to the upstream side 72 of one of the optical fibers 72. The The optical fiber 72 is used to guide light to the reflective layer 14, and can be arranged in a regular pattern. Such as a hexagonal, rectangular, square, symmetric, triangular, octagonal, or the like) or may be optionally dispersed thereon. The optical fiber 72 may be of any kind, such as those known in telecommunication technology, and plastic optical fiber. It is generally required that the 4 optical fibers 72 be suitable for light in the visible spectrum (i.e., those having a wavelength of about 400 to 8011111). The optical fiber 72 can be further configured to provide more uniform illumination to the reflective layer 14 (as opposed to forming an array of other light spots). For example, a portion of the coating (not shown) on the light downstream side 72B of the optical fibers 72 can be partially removed or roughened. This can be achieved, for example, by mechanical grinding, chemical etching (such as in diluted hydrogen fluoride). Acid), or any other similar method to complete 'to provide this uniform illumination. The reflective layer 14 "can also be as shown in the above figure 3. The paper size is suitable for financial standards (CNS) A4 (Qx297). 571147

To the ground. Please refer to FIG. 5A, which shows one of the inventions Lcm00, the pot contains a back ”. The LCD1GG is preferably made to be capable of recovering the systemic optical ring in the patent of Fads. The LCD 丨 00 industry type includes an electrically addressable array 20 "(such as described in Figure 1)," has a liquid crystal cavity 123 (such as an LCD with a 90._ nematic), and addressing Circuit, etc. The LCD 100 typically further includes an almost non-absorptive filter array 30 ″ ′ which includes an m-layer i31. The filter and the optical layer 131 may include any relatively non-absorptive color filter film 131 ′ such as a cholesteric liquid crystal polarizing layer, An interference thin film layer, a bilayer & hetero-reflective layer made of birefringent polymer (eg, DBEF ^ Brightness Enhancement Film manufactured by MN'St. Paul, 3M Company), or a full-image filter Film, etc. In the generally required embodiment, the filter layer 3 contains a cholesteric liquid crystal polarizing layer. The cholesteric liquid crystal polarizing layer is disclosed in more detail in Li et al. Nos. 5691789 and 6034753 US In the patent, and in the United States Patent Application No. __ filed by He and Faris on June 20, 2001 (the agent number is No. 11 〇1.011), its name is, the backlight system of the liquid crystal display ", which The information of each case is hereby attached for reference. The LCD 100 typically includes a wider frequency band reflective polarizing film 80 interposed between the backlight 10 "and the filter array 30". The reflective polarizing film 80, broad band, means that it can polarize incident light at almost all visible light wavelengths (i.e., having a wavelength of about 400 to 800 nm). An example of the reflective polarizing film 80 may include a Bragg reflective film made of a birefringent polymer (eg, MN, St. Paul, DBEF manufactured by 3M Company), which can transmit linearly polarized light; and a wider frequency band Cholesterol liquid crystal polarizing layer (such as 12 in the references mentioned in this paragraph (please read the precautions on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 (210X297 mm) 571147 A7 B7 V. Description of the Invention (10 Revealers) 'It can transmit circularly polarized light. The LCD 100 can also be selectively packaged, including its coating layer, which is preferably a non-absorptive one, such as linear polarization Film, 1/4 wave retardation film, diffusion layer, transparent substrate, etc. Please refer to FIG. 5B. In another embodiment, LCD (R) includes the backlight 70 (FIG. 4). As shown, the The LCD is substantially similar to the LCD 100, except that it includes a fiber-optic backlight 70 instead of the aforementioned backlight. "The various modifications of the present invention described above are merely examples. Professionals should be able to easily understand the various shown Other modifications of the embodiment. Such amendments and changes should still be included in the spirit and scope defined in the following patent scope. ^ (Please read the precautions on the back before filling this page) "The paper size applies to the Chinese National Standard (CNS) A4 Specifications (210X297 mm) 13 571147 A7 B7 V. Description of the invention (U) 10 ... Backlight 11, 71 ... Light source 12 ... Light guide 13 ... Diffusion element 14 ... Reflective film 20 ... Spatial intensity modulation element array 21, 32 ... · Polarizing film 2 2 ... film layer 23,123 ··· liquid crystal cavity 24,3 3 ... glass substrate 30 ... color filter element array element reference number 31 ... color filter film 40 ··· display 50，100- & quot LCD 70 ... backlight 7 2 ... optical fiber 72A ... light upstream side 7 2 B ... light downstream side 73 ... lens 80 ... reflection polarizing film 122 ... address circuit 131 ... filter layer (please read the precautions on the back before filling this page ), OK 丨-This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) 14

Claims (1)

571147 Sixth, the scope of application for patents The Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs printed No. 91101275 Patent Application for Amendment of the Patent Scope 92 0 4 n 1 · A backlight of a liquid crystal display using light circulation, the backlight includes · a light source; a The light guide is made of an almost non-absorptive material selected from the group consisting of acrylic, polycarbonate, polymethacrylic acid, and the light guide will absorb less than 5% of the light energy incident thereon; And a reflective layer is made of a highly reflective material, the material is selected from the group consisting of aluminum, silver, barium sulfate, magnesium oxide, and organic materials, and the reflective layer will reflect at least 95% of the incident on it Light energy. 2. The backlight according to item 1 of the patent application, wherein the reflective layer includes a diffuse reflective layer, and the organic materials are selected from the group consisting of SpectralonW (a polymer resin containing polytetrafluoroethylene and barium sulfate) and Melinex A group of ®329 (a polyester film made of polyethylene terephthalate). 3. The backlight of item 1 of the patent application scope, wherein the backlight reflects at least 85% of the light energy incident thereon. 4. The backlight of item 1 of the patent application scope, wherein the backlight reflects at least 95% of the light energy incident thereon. 5. The backlight according to item 1 of the patent application range, wherein the light guide absorbs light energy incident thereon which is less than 1 ° / 〇. 6. The backlight according to item 丨 of the application, wherein the light guide is made of a material selected from the group consisting of acrylic, polycarbonate, and polymethyl methacrylate. 7. As stated in the backlight of item 1 of the patent scope, the reflective layer will reflect to (Please read the notes on the back before filling this page) -15-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 571147 A8 cBs8 —---_ /, patent application scope 98% less light energy incident on it. 8 · If the scope of patent application is the first! The item of backlight, wherein the reflective layer comprises barium sulfate. 9. If the backlight of item i in the scope of the patent application further includes a diffusion layer, it will only absorb less than 5% of the light energy incident on it. 10. A liquid crystal display comprising: a backlight as described in item 1 of the scope of the patent application; an electrically addressable array containing liquid crystal cavities; an almost non-absorptive filter array; and a wideband polarizing layer. 11. The liquid crystal display as claimed in claim 10, wherein the filter array 歹! At least one member is selected from the group consisting of a cholesteric liquid crystal polarizing layer, an interference film stack, a Bragg reflective layer composed of a birefringent polymer, and a holographic filter layer. 12. The liquid crystal display of claim 10, wherein the filter array includes a cholesteric liquid crystal polarizing layer. 13. The liquid crystal display of claim 10, wherein the broadband polarizing layer includes a cholesteric liquid crystal polarizing layer. 14. A backlight of a liquid crystal display using light circulation, the backlight includes a light source; a light guide made of an almost non-absorptive material selected from the group consisting of acrylic, polycarbonate, and polyacrylic acrylic Group of vinegar, the light guide will absorb less than 0.5% of the light energy incident on it; and a diffuse reflection layer is selected from the group consisting of sulfuric acid lock, this paper size applies Chinese national standard (cns) A4 specification (210 X 297 Mm) " -16-(Please read the notes on the back before filling this page) 571147 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A8 B8 C8 D8 VI. Patent application scope Spectralon® (a polymer resin containing polytetrafluoroethylene and barium sulfate) and Melinex® 329 (a polyparaphenylene terephthalate Polyester film made of ethylene glycol ester), the reflective layer reflects at least 95% of the light energy incident on it; wherein the backlight reflects at least 85% of the light energy incident on it Light energy onto it. 15 · —A liquid crystal display comprising: a backlight including: a light source; a light guide system made of an almost non-absorptive material selected from the group consisting of acrylic, polycarbonate, and polyfluorenyl acrylate Group, the light guide absorbs less than 0.5% of the light energy incident thereon; and a diffuse reflection layer is made of a highly reflective material selected from the group consisting of aluminum, silver, barium sulfate, magnesium oxide, Group of Spectralon® (a polymer resin containing polytetrafluoroethylene and barium sulfate) and Melinex®329 (a polyester film made of polyethylene terephthalate), the reflective layer Will reflect at least 95% of the light energy incident on it; an electrically addressable array containing liquid crystal cavities; an almost non-absorptive filter array; and a wideband polarizing layer; wherein the backlight will reflect at least 85% Light energy incident on it. W · —a backlight of a liquid crystal display using light circulation, the backlight includes: a light source; a bundle of optical fibers' the special optical fiber contains a light upstream side and a light downstream side, and these fibers further include a coating material; G Zhang's Standards for Financial Services (CNS) A4 Specification (210 X 297 Public Love) ------ (Please read the precautions on the back before filling this page) ---- Order ------ --- 17 571147 AB CD VI. Patent application scope A reflective layer is made of a highly reflective material, the material is selected from the group consisting of aluminum, silver, barium sulfate, magnesium oxide, and organic materials, and the reflection The layer reflects at least 95% of the light energy incident thereon; wherein the optical fiber is configured to receive light from the light source and distribute the light to the reflective layer. 17_ The backlight according to item 16 of the application, wherein the light source is an incandescent lamp. 18. The backlight of item 16 of the patent application scope further includes one or more lenses that can guide light from the light source to the upstream side of the optical fibers. 19. The backlight of item 16 of the scope of patent application, wherein the upstream side of the optical fibers is set to operatively abut the light source so that light can be introduced. 20. The backlight according to item 16 of the patent application, wherein the light downstream side of the optical fibers is arranged on the reflective layer with a generally regular pattern selected from the group consisting of hexagons, rectangles, squares, and symmetrical shapes. , Triangle, octagon, etc. 21. The backlight according to item 16 of the patent application, wherein the light downstream side of the optical fibers is arranged on the reflective layer in a substantially random pattern. 22. The backlight of item 16 of the patent application, wherein the coating is removed from the light downstream side of a part of the optical fibers. 23. The backlight of claim 16 in which the coating is roughened on the downstream side of a part of the optical fibers. 24. The backlight of claim 16 in which the reflective layer comprises barium sulfate. 25. If the backlight of the 16th in the scope of patent application is applied, the backlight will reflect to 18 copies. “The Zhang scale is applicable to the Chinese national standard (cns) M specifications.” 571147 85% less light energy incident on it. 26. The backlight of item 16 of the patent application, wherein the backlight reflects at least 95% of the light energy incident thereon. 27. A liquid crystal display comprising: a backlight as described in item 16 of the scope of the patent application; an electrically addressable array containing liquid crystal cavities; an almost non-absorptive filter array; and a wideband polarizing layer. 28. The liquid crystal display according to item 27 of the patent application scope, wherein the filter array contains at least one member selected from the group consisting of a Bragg consisting of a cholesteric liquid crystal polarizing layer, an interference film laminate, and a birefringent polymer. Group of reflective layer and holographic filter layer. 29. The liquid crystal display of claim 27, wherein the filter array includes a cholesteric liquid crystal polarizing layer. 30. The liquid crystal display of claim 27, wherein the broadband polarizing layer includes a cholesteric liquid crystal polarizing layer. 31. A method for manufacturing a backlight of a liquid crystal display, the method comprising: providing a light source; providing a reflective layer is made of a highly reflective material, the material is selected from the group consisting of Shao, silver, and barium sulfate, The reflective layer reflects at least 95% of the light energy incident thereon; a bundle of optical fibers is provided, and these optical fibers contain an optical upstream side and an optical downstream side, and include a coating material; The upstream side of the light is operatively abutted with the light source. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 571147. The scope of patent application is applied; and the downstream side of the optical fiber is operated with the reflective layer. Sexually abut positioning. 32. The method of claim 3i of the scope of patent application, wherein positioning the upstream side of the light includes interposing at least one lens between the light source and the upstream side of the optical fibers. 33. The method of claim 31, wherein the positioning of the upstream side of the light includes selectively removing the coating material and roughening the downstream side of a portion of the optical fibers. 34. The method of claim 33, wherein the selective roughening and removal of the coating includes mechanically grinding the downstream side of the optical fibers. 35. The method of claim 33, wherein the selective roughening and removal of the coating includes immersing the downstream side of these optical fibers in an aqueous solution of monofluoric acid. 36 · —A method for manufacturing a liquid crystal display, comprising: providing a light source; and providing a reflective layer with wires is made of a highly reflective material selected from the group consisting of Shao, silver, and barium sulfate, and the reflection The layer reflects at least 95% of the light energy incident on it; for a bundle of optical fibers, the optical fibers include a light upstream side and a light downstream side, and contain a coating material; the light upstream side of these fibers and The light source is operatively abutted and positioned; the light downstream side of the optical fibers and the reflective layer are operatively abutted. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 parent 297 male cage) 20 571147 8 8 8 8 • AB CD VI. Positioning of the scope of patent application; combining an almost non-absorptive filter array with the reflection stack; and combining an electrically addressable array containing liquid crystal cavities with the reflection stack 0 This paper size applies to China National Standard (CNS) A4 Specification (210X297 mm) -21