1285289 九、發明說明： 【發明所屬之技術領域】 本發明提供一種石夕基液晶顯示器（liquid cryStai on silicon display，LCoS display)，尤指一種將彩色濾光片設置 於玻璃基板上表面之LCoS顯示器。 【先前技術】1285289 IX. Description of the Invention: [Technical Field] The present invention provides a liquid cryStai on silicon display (LCoS display), and more particularly to an LCoS display in which a color filter is disposed on the upper surface of a glass substrate. . [Prior Art]
石夕基液晶顯示器是反射式液晶投影機(ref|ective LCoS projector)與背投影電視(rear_projecti〇n television)的關鍵技 術。LCoS顯示器最大之優點係在於可大幅降低面板生產成 本以及體積輕、薄、短、小，同時另具有高解析度以及低 功率等優點。LCoS顯示器與一般薄膜電晶體液晶顯示器 (thin film transistor-liquid crystal display，TFT-LCD)不同之 處在於TFT-LCD上下兩面皆是以玻璃作為基底 (substrate)，但LCoS面板僅有上面採用玻璃，底下的基底 則是以半導體材料石夕為主，因此，LCoS面板之製程其實是 結合LCD與半導體互補式金氧半導體(conipiementary metal-oxide semiconductor，CMOS)製程的技術。 LCoS顯示器的主要結構可分為光源模組、LC〇s面板、 分光合光系統等。一般而言，LCoS顯示器可依照光學引擎 1285289 之設計分A — 二片式(three-panel)及單片式（single panel)兩大 類0三片、V、 ， '光學引擎係將光源所產生之光束經分光稜鏡分 為紅、Μ、故，， 、、彔光後，再分別將光束投射入三片LCoS面板， 取後將投射出的三色影像經過合光系統加以結合，以形成 《、y像單片式光學引擎是利用色轉輪(color wheel)將白 光开y成循序的紅、藍、綠光，並將此光學三原色光與驅動 私式產生的紅、藍、綠晝面，同步形成分色影像，再藉由 人眼視覺暫留的特性，最後在人腦產生彩色的投影晝面。 清參考第1圖，第1圖為習知一 LCoS面板10的部分剖 視圖。習知LCoS面板10包含有一表面設有複數個MOS 電晶體和像素電極(未顯示）之半導體基底12以及一玻璃基 板14 ’相對設於半導體基底12之上，兩者之間設有一液 晶層16’液晶層16之上則設有一透明導電層18。一般而 言，習知LCoS面板10還包含有一抗反射層（anti-reflective coating) 22設於透明基板14表面，而在液晶層16之上下 兩側各設有一配向層（未顯示）。部分習知LCoS面板10另 包含有一彩色濾光片20，設於透明導電層18與玻璃基板 14之間，或是設於液晶層16上之配向層與透明導電層18 之間。 6 1285289 然而，不論習知技術中之彩色濾光片20係設於玻璃基 板14與透明導電層18之間，或設於透明導電層18與配向 層之間，彩色濾光片20在LCoS面板10操作時會不斷產 生”、、里’且不谷易猎由外在冷卻系統加以散熱，導致Lc〇s 面板10容易累積熱量，進而影響LCoS面板10的元件壽 命。故如何改良LCoS面板的結構設計以改良其散熱情形， 進而延長LCoS面板各元件的使用壽命，實為業界仍待研 究之課題。 【發明内容】 因此本發明之主要目的在於提供一種能改善LC〇s面板 政熱問題以及節省製作成本之LCoS顯示器，以解決習知 LCoS顯示器的問題。 根據本發明之申請專利範圍，係揭露一種LCoS顯示 面板。本發明之顯示面板包含有一矽基底、一設於矽基底 上之透明基板、一介於矽基底以及透明基板之間的液晶 層’以及複數個微型彩色濾光片（micro color filter)，設於 透明基板之上表面。此外，矽基底表面設有複數個排列成 一像素陣列之像素，而各像素另包含有複數個次像素，且 各微型彩色慮光片係分別對應於一次像素。 1285289 由於本發明係將微型彩色濾光片設置於透明基板之上 表面，因此熱量不易累積於顯示面板内部而可避免造成顯 示面板過熱或内部元件的傷害。同時，設置於顯示面板表 面之微型彩色濾光片所產生的熱量也可輕易藉由如風扇等 冷卻系統散熱而使顯示面板維持一較佳溫度。另一方面， 將微型彩色濾光片設置於透明基板表面亦可達到取代抗反 射層的功能，以減少製程成本。 【實施方式】 請參考第2圖，第2圖為本發明LCoS顯示面板30的剖 視圖。LC0S顯示面板30包含有一矽基底32、一設於石夕基 底32上之透明基板34 ’以及一液晶層36設於石夕基底32 以及透明基板34之間。砍基底32表面包含有一像素區域 46，其内設有複數個M0S電晶體和相對應之像素電極（未 顯示）。透明基板34具有一上表面34a以及一下表面34b， 在透明基板下表面34b另設有一透明導電層％，例如為一 氧化銦錫（indium tin oxide，IT0)層，而在液晶層36與透明 導電層38以及石夕基底32之間，各設有一上配向層 alignment layer) 42 以及一下配向層（bottom alignment layer) 44,以用來調整液晶層36内之液晶分子的排列方向。在本 1285289 實施例中，透明基板34的材料為一玻璃基板，然而，透明 基板34亦可由其他可透光之材料代替，例如石英基板。 LCoS顯示面板30另包含有一彩色濾光片4〇設於透明 基板34之上表面34a上並對應於像素區域46。彩色濾光片 40之材料可為一感光材料，例如由光阻材料或是感光樹脂 所構成。同時，在感光材料中另摻有一紅色、藍色或綠色 染料，以使從LCoS顯示面板30反射出之光僅具有特定顏 色0 在本實施例中，LCoS顯示面板30可應用於三片式LCoS 顯示器，亦即在一三片式LCos顯示器中設置三LCoS顯示 面板30，而每一 LC〇S顯示面30中之彩色濾光片40分別 為紅色濾光片、藍色濾光片及綠色濾光片，因此，藉由三 LCoS顯示面30反射出具有紅光、藍光及綠光的影像晝面， 再經由合光系統便可形成完整的彩色晝面。 請參考第3圖’第3圖為本發明LCoS顯示器另一實施 例的部分剖視圖。本發明LC〇S顯示器具有一 LCoS顯示面 板50，其包含有一矽基底58、一玻璃基板56，以及一設 於矽基底58和玻璃基板56間之液晶層62。玻璃基板56 1285289 之下表面56b設有一作為透明導電層之IT〇層6〇，在ιτ〇 層60表面則設有一上配向層64。矽基底58為一半導體基 底，其表面設有複數個排列成一像素陣列之像素，而每一 像素另包含有三個次像素，在第3圖中僅繪出一像素52以 及其所包含之次像素54a、54b、54c，而每一次像素5知、 54b、54c中均設有M0S電晶體和金屬電極（未顯示），用來 控制各次像素54a、54b、54c的開關，以使液晶層62間的 液晶分子旋轉而讓光線通過。此外，在石夕基底58表面另吸 有一下配向層66。 LCoS顯示面板50另包含有複數個微型彩色濾光片，分 別為微型紅色濾光片68a、微型藍色濾光片68b以及微型 綠色濾光片68c，並分別對應於每一像素52中之一次像素 54a、54b、54c。每一微型紅色濾光片68a、微型藍色濾光 片68b以及微型綠色滤光片68c係由複數個光學薄膜堆疊 而成，並包含有一低反射率光學薄膜堆疊（〇pticalthh>film stack)，例如氧化矽（snicon oxide，si〇2)薄膜，或一高反射 率光學溥膜堆豐’如氧化鈦(titanium oxide, Ti02)或氧化组 (tantalum oxide，Ta205)薄膜。在本實施例中，形成微型彩 色濾、光片之光學薄膜為分色膜(dichroic film)。 1285289 微型彩色濾光片係用來處理特定頻率範圍之光線，如第 3圖所顯示之微型紅色濾光片68a、微型藍色濾光片68b以 及微型綠色濾光片68c ’係分別只允許一第一頻率範圍、 一第二頻率範圍以及一第三頻率範圍的光線通過，而在本 發明之較佳實施例中，第一頻率範圍、第二頻率範圍與第 二頻率範圍的光線係分別為紅光、藍光及綠光。此外，微 型紅色濾光片68a、微型藍色濾光片68b以及微型綠色濾 光片68c之位置係分別與矽基底58表面各像素52之次像 素54a、54b、54c的金屬電極相對應，以使通過微型紅色 滤光片68a、微型藍色濾光片68b以及微型綠色濾光片68c 的光線會分別被下方之金屬電極向上反射，以使不同頻率 範圍的光線再重新混合，而形成彩色影像。 在本發明之另一實施例中，微型紅色濾光片68a、微型 藍色濾光片68b以及微型綠色濾光片68c係由光阻或感光 樹脂等感光材料所構成，且分別摻有紅色、藍色或綠色等 彩色染料，以使通過微型紅色濾光片68a、微型藍色濾光 片68b以及微型綠色濾光片68c之白光產生不同顏色光 線，再經由反射混光而形成彩色影像。 此外，在各微型紅色濾光片68a、微型藍色濾光片68b 1285289 以及微型綠色濾光片68c間可另鍍有一非透明層，其材料 可為铭、絡、鎳、銅、鐵、鋅、鈦、金、銀、銘、鶴、網、 鈕、锆、碳中之任一者或其組合物，以減少漏光的情形發 生’進而改善提高圖像和雜訊之對比值。 本發明LCoS顯示面板50可應用於單片型LCoS顯示器 中，且由於當白光射入LCoS顯示面板5〇後，可經由微变 紅色濾光片68a、微型藍色濾光片68b以及微型綠色濾光 · 片68c直接產生彩色影像，因此不需在lC〇s顯示器中設 置複雜的色轉輪或分光合光系統等光學引擎，可以大幅降 低習知技術之製程成本，且進一步達到減少LC〇s顯示器 體積以滿足市場需求之目標。 相較於習知技術，本發明係將利用光學薄膜堆疊或感光 材料形成之彩色濾光片製作於透明基板上方，可以有效改春 。驾知技術中熱里累積於LCoS面板内而造成過熱的情 況’且根據本發明之設計，由於彩色濾光片係設置於LCoS 面板之最外層，因此，彩色濾光片在]；^…面板操作時所 產生的熱量可以輕易藉由設置在LCoS面板附近之冷卻系 統加以散熱’例如可以藉由風扇而降低彩色濾光片之溫 度’使LCoS面板表面冷卻而使lc〇S面板維持在一較佳之 12 1285289 溫度。另一方面，將彩色濾光片設置於LCoS面板之透明 基板表面，亦可取代習知LCoS面板中抗反射層的功能， 而使LCoS面板廠商可以節省部分生產成本。 以上所述僅為本發明之較佳實施例，凡依本發明申請專 利範圍所做之均等變化與修飾，皆應屬本發明專利之涵蓋 範圍。 【圖式簡單說明】 第1圖為習知一 LCoS面板的部分剖視圖。 第2圖為本發明LCoS顯示面板的剖視圖。 第3圖為本發明LCoS顯示器另一實施例的部分剖視圖。 【主要元件符號說明】 10 LCoS面板 12 半導體基底 14 玻璃基板 16 液晶層 18 透明導電層 20 彩色濾光片 22 抗反射層 30 LCoS顯示面板 32 矽基底 34 透明基板 34a 透明基板上表面 34a 透明基板下表面 36 液晶層 38 透明導電層 13 1285289 40 彩色濾光片 42 44 下配向層 46 50 LCoS顯示面板 52 54a、 54b、54c 次像素 56 56a 玻璃基板上表面 56b 58 矽基底 60 62 液晶層 64 66 下配向層 68a 68b 微型藍色濾光片 68c 上配向層 像素區域 像素 玻璃基板 玻璃基板下表面 ITO層 上配向層 微型紅色濾、光片 微型綠色濾光片 14Shi Xiji liquid crystal display is the key technology of reflective liquid crystal projector (ref|ective LCoS projector) and rear projection television (rear_projecti〇n television). The biggest advantage of LCoS displays is that they can significantly reduce panel production costs and are light, thin, short, and small, while also providing high resolution and low power. The difference between a LCoS display and a thin film transistor-liquid crystal display (TFT-LCD) is that the upper and lower sides of the TFT-LCD are made of glass as a substrate, but the LCoS panel has only glass on the top. The underlying substrate is based on the semiconductor material Shi Xi, therefore, the LCoS panel process is actually a combination of LCD and semiconductor complementary metal-oxide semiconductor (CMOS) process technology. The main structure of the LCoS display can be divided into a light source module, an LC〇s panel, a splitting and combining system, and the like. In general, LCoS displays can be divided into two types according to the design of optical engine 1285289: three-panel and single panel. 0, V, , 'optical engine system produces the light source. After the beam is split into red, Μ, 、, 、, 彔, the beam is then projected into the three LCoS panels, and the projected three-color image is combined by the merging system to form The y-like monolithic optical engine uses a color wheel to turn white light into sequential red, blue, and green light, and the optical three primary colors and the privately generated red, blue, and green faces. Synchronously forming a color separation image, and then by the characteristics of the human eye persistence, finally producing a colored projection surface in the human brain. Referring to Fig. 1, a first partial cross-sectional view of a conventional LCoS panel 10 is shown. The conventional LCoS panel 10 includes a semiconductor substrate 12 having a plurality of MOS transistors and pixel electrodes (not shown) on the surface, and a glass substrate 14' disposed opposite the semiconductor substrate 12 with a liquid crystal layer 16 therebetween. A transparent conductive layer 18 is provided over the liquid crystal layer 16. In general, the conventional LCoS panel 10 further includes an anti-reflective coating 22 disposed on the surface of the transparent substrate 14, and an alignment layer (not shown) disposed on both sides of the liquid crystal layer 16. The conventional LCoS panel 10 further includes a color filter 20 disposed between the transparent conductive layer 18 and the glass substrate 14, or between the alignment layer on the liquid crystal layer 16 and the transparent conductive layer 18. 6 1285289 However, regardless of the prior art, the color filter 20 is disposed between the glass substrate 14 and the transparent conductive layer 18, or between the transparent conductive layer 18 and the alignment layer, and the color filter 20 is on the LCoS panel. 10 operation will continue to produce ",, and" and will not be cooled by the external cooling system, which will cause the Lc〇s panel 10 to easily accumulate heat, which will affect the component life of the LCoS panel 10. Therefore, how to improve the structure of the LCoS panel The design is to improve the heat dissipation situation, and thus prolong the service life of the components of the LCoS panel, which is still a subject to be studied in the industry. [The present invention] Therefore, the main object of the present invention is to provide an improvement of the LC〇s panel political heat problem and the saving. A cost-effective LCoS display is provided to solve the problem of the conventional LCoS display. According to the patent application scope of the present invention, an LCoS display panel is disclosed. The display panel of the present invention comprises a substrate, a transparent substrate disposed on the substrate, a liquid crystal layer between the substrate and the transparent substrate and a plurality of micro color filters are provided in In addition, the surface of the substrate is provided with a plurality of pixels arranged in a pixel array, and each pixel further includes a plurality of sub-pixels, and each of the micro-color light-receiving films respectively corresponds to one pixel. 1285289 In the invention, the micro color filter is disposed on the upper surface of the transparent substrate, so that heat is not easily accumulated inside the display panel, and the display panel may be prevented from being overheated or damaged by internal components. Meanwhile, the micro color filter disposed on the surface of the display panel is provided. The generated heat can also be easily cooled by a cooling system such as a fan to maintain a preferred temperature of the display panel. On the other hand, the micro color filter can be disposed on the surface of the transparent substrate to replace the anti-reflection layer. [Embodiment] Please refer to FIG. 2, which is a cross-sectional view of the LCoS display panel 30 of the present invention. The LCOS display panel 30 includes a substrate 32 and a transparent substrate 34 disposed on the stone substrate 32. 'and a liquid crystal layer 36 is disposed between the stone substrate 32 and the transparent substrate 34. The surface of the chopping substrate 32 includes a pixel region A plurality of MOS transistors and corresponding pixel electrodes (not shown) are disposed in the field 46. The transparent substrate 34 has an upper surface 34a and a lower surface 34b, and a transparent conductive layer % is further disposed on the transparent substrate lower surface 34b. For example, an indium tin oxide (IT0) layer, and between the liquid crystal layer 36 and the transparent conductive layer 38 and the Shixia substrate 32, each has an upper alignment layer 42 and a bottom alignment layer. The layer 44 is used to adjust the alignment direction of the liquid crystal molecules in the liquid crystal layer 36. In the embodiment of the 1285289, the material of the transparent substrate 34 is a glass substrate, however, the transparent substrate 34 may be replaced by other light transmissive materials. , for example, a quartz substrate. The LCoS display panel 30 further includes a color filter 4 disposed on the upper surface 34a of the transparent substrate 34 and corresponding to the pixel region 46. The material of the color filter 40 may be a photosensitive material such as a photoresist material or a photosensitive resin. At the same time, a red, blue or green dye is additionally incorporated in the photosensitive material so that the light reflected from the LCoS display panel 30 has only a specific color. In this embodiment, the LCoS display panel 30 can be applied to a three-piece LCoS. The display, that is, the three LCoS display panels 30 are disposed in a three-chip LCos display, and the color filters 40 in each of the LC〇S display faces 30 are red filters, blue filters, and green filters, respectively. The light sheet, therefore, the image plane having red, blue and green light is reflected by the three LCoS display surface 30, and a complete color surface can be formed through the light combining system. Please refer to Fig. 3, which is a partial cross-sectional view showing another embodiment of the LCoS display of the present invention. The LC(R) display of the present invention has an LCoS display panel 50 comprising a germanium substrate 58, a glass substrate 56, and a liquid crystal layer 62 disposed between the germanium substrate 58 and the glass substrate 56. The lower surface 56b of the glass substrate 56 1285289 is provided with an IT layer 6 as a transparent conductive layer, and an upper alignment layer 64 is provided on the surface of the layer 60. The germanium substrate 58 is a semiconductor substrate having a plurality of pixels arranged in a pixel array on the surface thereof, and each pixel further includes three sub-pixels. In FIG. 3, only one pixel 52 and sub-pixels thereof are depicted. 54a, 54b, 54c, and each of the pixels 5, 54b, 54c is provided with a MOS transistor and a metal electrode (not shown) for controlling the switching of each of the sub-pixels 54a, 54b, 54c to make the liquid crystal layer 62 The liquid crystal molecules rotate to allow light to pass. In addition, a counter-alignment layer 66 is additionally attracted to the surface of the stone-like substrate 58. The LCoS display panel 50 further includes a plurality of micro color filters, which are a micro red filter 68a, a micro blue filter 68b, and a micro green filter 68c, respectively, and corresponding to each of the pixels 52. Pixels 54a, 54b, 54c. Each of the micro red filter 68a, the micro blue filter 68b, and the micro green filter 68c are stacked from a plurality of optical films and include a low reflectivity optical film stack (〇pticalthh>film stack). For example, a squinon oxide (si〇2) film, or a high-reflectivity optical ruthenium film such as titanium oxide (Titanium oxide, Ti02) or oxidation group (tantalum oxide, Ta205) film. In the present embodiment, the optical film forming the micro color filter and the light sheet is a dichroic film. 1285289 Micro color filter is used to process light in a specific frequency range. As shown in Figure 3, the micro red filter 68a, the micro blue filter 68b and the micro green filter 68c are only allowed one. The light of the first frequency range, the second frequency range, and the third frequency range passes, and in the preferred embodiment of the present invention, the light systems of the first frequency range, the second frequency range, and the second frequency range are respectively Red, blue and green. In addition, the positions of the micro red filter 68a, the micro blue filter 68b, and the micro green filter 68c correspond to the metal electrodes of the sub-pixels 54a, 54b, 54c of the pixels 52 on the surface of the 矽 substrate 58, respectively. The light passing through the micro red filter 68a, the micro blue filter 68b, and the micro green filter 68c is respectively reflected upward by the lower metal electrode, so that light of different frequency ranges is remixed to form a color image. . In another embodiment of the present invention, the micro red filter 68a, the micro blue filter 68b, and the micro green filter 68c are formed of a photosensitive material such as a photoresist or a photosensitive resin, and are respectively doped with red, A color dye such as blue or green color is used to generate different colors of light by the white light passing through the micro red filter 68a, the micro blue filter 68b, and the micro green filter 68c, and then mixed by reflection to form a color image. In addition, a non-transparent layer may be additionally plated between each of the micro red filter 68a, the micro blue filter 68b 1285289 and the micro green filter 68c, and the material thereof may be inscription, complex, nickel, copper, iron, zinc. , titanium, gold, silver, Ming, crane, net, button, zirconium, carbon or any combination thereof to reduce the occurrence of light leakage, and thus improve the contrast between image and noise. The LCoS display panel 50 of the present invention can be applied to a monolithic LCoS display, and since white light is incident on the LCoS display panel 5, it can pass through the micro-red filter 68a, the micro-blue filter 68b, and the micro-green filter. The light piece 68c directly produces a color image, so that it is not necessary to provide an optical engine such as a complicated color wheel or a beam splitting system in the lC〇s display, which can greatly reduce the process cost of the conventional technology, and further reduce the LC〇s. The display volume is designed to meet the market demand. Compared with the prior art, the present invention is to use a color filter formed by an optical film stack or a photosensitive material to be formed on a transparent substrate, which can effectively change the spring. In the case where the heat is accumulated in the LCoS panel to cause overheating, and according to the design of the present invention, since the color filter is disposed on the outermost layer of the LCoS panel, the color filter is in the panel; The heat generated during operation can be easily dissipated by a cooling system disposed near the LCoS panel. For example, the temperature of the color filter can be lowered by a fan to cool the surface of the LCoS panel and maintain the lc〇S panel. Good 12 12285289 temperature. On the other hand, the color filter is disposed on the surface of the transparent substrate of the LCoS panel, which can also replace the function of the anti-reflection layer in the conventional LCoS panel, so that the LCoS panel manufacturer can save part of the production cost. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the patentable scope of the present invention should be covered by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial cross-sectional view of a conventional LCoS panel. Figure 2 is a cross-sectional view of the LCoS display panel of the present invention. Figure 3 is a partial cross-sectional view showing another embodiment of the LCoS display of the present invention. [Main component symbol description] 10 LCoS panel 12 Semiconductor substrate 14 Glass substrate 16 Liquid crystal layer 18 Transparent conductive layer 20 Color filter 22 Anti-reflection layer 30 LCoS display panel 32 矽 Substrate 34 Transparent substrate 34a Transparent substrate upper surface 34a Transparent substrate Surface 36 liquid crystal layer 38 transparent conductive layer 13 1285289 40 color filter 42 44 lower alignment layer 46 50 LCoS display panel 52 54a, 54b, 54c sub-pixel 56 56a glass substrate upper surface 56b 58 矽 substrate 60 62 liquid crystal layer 64 66 under Alignment layer 68a 68b micro blue filter 68c upper alignment layer pixel area pixel glass substrate lower surface ITO layer alignment layer micro red filter, light sheet micro green filter 14