1258602 九、發明說明： 【發明所屬之技術領域】 種微顯示器之 本發明係關於一種螢幕，特別是關於— 螢幕。 、 【先前技術】 背投式顯示器係以其大螢幕、圖像清晰爲特色 統利用映像管之顯示器相比，f投式顯示器除了且有無輕 射、晝面尺寸大等優點外，更可直接接上電腦或是复^ 音設備，達到最大的娛樂效果。因此，隨著生活水準的^ 高和居住條件的改善，t投式顯示器愈來愈受到消費者的 青睞。 月才又影顯示器按照投影技術來區分，可以分成p極射 線管（Cathode Ray Tube, CRT)投影技術、以及微顯示器 (Microdisplay)投影技術。其中，陰極射線管顯示器主要 是利用陰極射線管上的影像經由光學系統在螢幕上擴大 投影的顯示器；微顯示器則是利用各種不同的顯像單元， 例如穿透式液晶面板、數位微鏡元件（DMD)、反射式液 晶面板（LCoS)，以將光源發出的光投射在螢幕上的顯示 器。 隨著視訊技術的提昇與市場的需求，近年來微顯示器 螢幕（Microdisplay Screen)係廣泛地運用於背投電視機 (Rear Projection TV)之顯示幕、終端機螢幕（Monitor Screen)、及多媒體展示幕（Multi-screen Installation)等等。 1258602 請參照圖1，微顯示器螢幕1係為一穿透型螢幕 (Transmissive Screen)，其主要係由一菲涅耳透鏡板 (Fresnel Lens Sheet) 11 與一柱狀透鏡板（Lenticular Lens Sheet) 12所構成。其中，光源所發出的入射光先射入菲 淫耳透鏡板11聚光以形成平行光，再射至柱狀透鏡板12。 藉由柱狀透鏡板12上複數柱狀透鏡121來控制水平方向 和垂直方向的光線分佈，以提昇影像的亮度均勻度，並使 得視域内的光線能做良好的運用。 另外，在柱狀透鏡板12之出光側，更具有一遮光層 122 ’其係具有遮光性材料，且分別精確覆蓋相對於柱狀 透鏡121之非聚光部（Non-Focusing Part)，用以散射光線， 並同時降低外部光線之影響。 微顯示器螢幕1係由背面（Rear Side)投射影像，使 在前面（Fr〇nt Side)觀看的使用者能由微顯示器螢幕1看 到影像。而在設計微顯示器螢幕1時，必須考慮到使用者 觀看的視角是否具有足夠亮度等問題。螢幕上大視角區域 之亮度愈大，則代表使用者足以在大視角之區域中觀看影 像。因此，如何增加大視角區域之亮度則成為製造薇商致 力要解決的重要課題。 有鑑於上述課題，本案發明人爰因於此，亟思一種可 以增加大視角區域之亮度之「微顯示器螢幕及其柱狀透鏡 板」。 【發明内容】 1258602 有鎩於上述課題，本發明之目的為提供一種具有次凸 部之微顯示器螢幕及柱狀透鏡板，可以增加大視角區域之 亮度。 本發明之另一目的為提供一種具有次凸部之柱狀透 鏡板，可以改變柱狀透鏡板之光線聚焦點。 緣是，為達上述目的，依本發明之微顯示器螢幕係包 含一柱狀透鏡板、以及一菲涅爾透鏡板。其中，柱狀透鏡 板係具有複數柱狀透鏡，柱狀透鏡係位於柱狀透鏡板之一 光入射側’且柱狀透鏡係分別具有至少一次凸部。菲丨里爾 透鏡板係與柱狀透鏡板相對而設。 為達上述目的，依本發明之柱狀透鏡板係包含複數柱 狀透鏡，柱狀透鏡係位於一光入射側，其特徵在於柱狀透 鏡係分別具有至少一次凸部。 承上所述，因依本發明之微顯示器螢幕及其柱狀透鏡 板，其柱狀透鏡係具有至少-次凸部。與f知技術相比， 具有次凸部之減透鏡係能改變部份L射至柱狀透 鏡板之焦距。使得射人次凸部之部份光線先行聚焦後，再 射至視角較大之區域’故能提昇營幕較大視角區域之亮 度。如此-來’使得具有次凸部之㈣透鏡於較大視角區 域之增益值係大於習知的柱狀透鏡。因此，位於視角較大 區域之使用者，則可因為微顯示器榮幕亮度之提高而獲得 較清晰之影像，進而提昇產品之品質並解決較大視角 亮度不足之問題。 4 1258602 【實施方式】 以下將參照相關圖式，說明依本發明之微顯示器螢幕 及其柱狀透鏡板之數個實施例。 首先，請參照圖2至圖6，以說明本發明第一實施例 之微顯示器螢幕。 如圖2所示，微顯示器螢幕2係包含一柱狀透鏡板 21、以及一菲淫爾透鏡板22。 柱狀透鏡板21係具有複數柱狀透鏡211，柱狀透鏡 211係位於柱狀透鏡板21之一光入射側212，且柱狀透鏡 211係分別具有至少一次凸部213。 本實施例中，各個柱狀透鏡211係具有二次凸部213。 其中’柱狀透鏡211之材質係可為光固性樹脂，可利用滾 輪壓合製成。 菲涅爾透鏡板22係與柱狀透鏡板21相對而設。本實 施例中’菲涅爾透鏡板22係具有一菲涅爾透鏡221，菲涅 爾透鏡221係與複數柱狀透鏡Hi相對而設。 清茶照圖3 ’本實施例中，次凸部213平行於入射光 線之截面係為一圓形之一部份。當然，次凸部213平行於 入射光線之截面亦可為一三角形之一部份、一多邊形之一 部伤、或是其他任意形狀，只要是能改變柱狀透鏡板21 之光線入射後之聚焦點之形狀即可。 各個柱狀透鏡211係分別具有一寬度p，本實施例中， 當次凸部213之截面為圓形之一部份時，圓形半徑長度係 小於柱狀透鏡211寬度p之1/4。另外，當次凸部213之 1258602 截面為三角形之一部份時，三角形最長邊之長度係小於寬 度P長度之1/4 ;當次凸部213之截面為多邊形之一部份 時，多邊形最長邊之長度係小於寬度P長度之1/4。 如圖4所示，將具有次凸部213之柱狀透鏡211之進 行入射光線之光路徑模擬，本實施例中，次凸部213之截 面形狀係以圓形為例。由實驗結果可知，利用柱狀透鏡2u 上之次凸部213，可改變部份入射光線之焦距，使得原本 要完全於聚焦點F聚焦之入射光線，因為部份光線射入次 凸部213，而先行聚焦至聚焦點F，並射至視角較大之區 域’故能提昇螢幕較大視角區域之亮度。如圖5所示，當 然次凸部213之截面形狀也可以是三角形。 由圖4及圖6可知，將具有次凸部213之柱狀透鏡211 與沒有次凸部213之對照組比較，具有次凸部213之柱狀 透鏡211於較大視角區域之增益值係大於對照組。也就是 5兒’柱狀透鏡211於較大視角區域之亮度係大於對照組。 如此一來，位於視角較大區域之使用者，則可因為螢幕亮 度之提高而獲得較清晰之影像。 其次’請參照圖3至圖7以說明本發明之第二實施例 之柱狀透鏡板。 如圖7所示，柱狀透鏡板30係包含複數柱狀透鏡31， 柱狀透鏡31係位於一光入射侧32，其特徵在於柱狀透鏡 31係分別具有至少一次凸部311。 本實施例中之柱狀透鏡板30，其功效及特徵係與前一 實施例中之柱狀透鏡板21相同，於此不再贅述。 1258602 綜上所述，本發明之微顯示器螢幕及其柱狀透鏡板， 其柱狀透鏡係具有至少—次凸部。與f知技術相比，具有 次凸部之城透_缺變部份光以射结狀透鏡板 之焦距。使得射人次凸部之部份光線先行聚焦後，再射至 視角較大之區域，故能提昇營幕較大視角區域之亮度。如 此來，使知具有次凸部之柱狀透鏡於較大視角區域之增 益值係大於習知的柱狀透鏡。因此，位於視該大區域之 使用者，則可因為微顯示器絲亮度之提高而獲得較清晰 之影像’進而提昇產品之品f並解決較大視角區域亮度不 足之問題。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與_，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1係為習知微顯示器螢幕之一示意圖； 圖2係為本發明微顯示器螢幕及其柱狀透鏡板之一示 意圖； 圖3係為本發明之柱狀透鏡板平行入射光線之一截面 示意圖，其中次凸部為圓形； 圖4係本發明之柱狀透鏡及次凸部進行光學路徑模擬 之一光路徑示意圖； 圖5係為本發明之柱狀透鏡板平行入射光線之另一截 面示意圖，其中次凸部為三角形； 1258602 圖6係本發明之柱狀透鏡板與對照組之增益值之比 較；以及 圖7係本發明之柱狀透鏡板之一示意圖。 元件符號說明： 1 微顯示器螢幕 11 菲淫耳透鏡板 12 柱狀透鏡板 121 柱狀透鏡 122 遮光層 2 微顯示器螢幕 21 柱狀透鏡板 211 柱狀透鏡 212 光入射側 213 次凸部 22 菲涅爾透鏡板 221 菲涅爾透鏡 30 柱狀透鏡板 31 柱狀透鏡 311 次凸部 32 光入射側 F 聚焦點 F， 聚焦點 P 寬度 111258602 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a screen, and more particularly to a screen. [Prior Art] The rear-projection display is characterized by its large screen and clear image. Compared with the display with the image tube, the f-type display can directly and directly have the advantages of light shooting and large size. Connect to a computer or a multi-tone device for maximum entertainment. Therefore, with the improvement of living standards and the improvement of living conditions, t-displays are increasingly favored by consumers. The monthly display is differentiated according to projection technology, and can be divided into a cathode ray tube (CRT) projection technology and a microdisplay projection technology. Among them, the cathode ray tube display mainly uses a display on the cathode ray tube to enlarge the projection on the screen via an optical system; the micro display uses various different developing units, such as a transmissive liquid crystal panel and a digital micromirror element ( DMD), Reflective Liquid Crystal Panel (LCoS), a display that projects light from a light source onto a screen. With the improvement of video technology and the demand of the market, in recent years, the Microdisplay Screen has been widely used in the display screen of Rear Projection TV, Monitor Screen, and multimedia display screen. (Multi-screen Installation) and so on. 1258602 Referring to FIG. 1, the microdisplay screen 1 is a Transmissive Screen, which is mainly composed of a Fresnel Lens Sheet 11 and a Lenticular Lens Sheet. Composition. The incident light emitted from the light source is first incident on the spectacles lens plate 11 to collect the parallel light, and is incident on the lenticular lens sheet 12. The horizontal and vertical light distributions are controlled by the plurality of lenticular lenses 121 on the lenticular lens sheet 12 to enhance the brightness uniformity of the image and to make the light in the field of view work well. In addition, on the light-emitting side of the lenticular lens sheet 12, a light-shielding layer 122' is further provided with a light-shielding material, and precisely covers the non-focal portion relative to the lenticular lens 121, respectively. Scatters light and simultaneously reduces the effects of external light. The microdisplay screen 1 projects an image from the rear side so that a user viewing on the front side (Fr〇nt Side) can see the image on the microdisplay screen 1. When designing the microdisplay screen 1, it is necessary to consider whether the viewing angle viewed by the user has sufficient brightness or the like. The greater the brightness of the large viewing area on the screen, the greater the user's ability to view the image in a large viewing area. Therefore, how to increase the brightness of the large viewing angle area has become an important issue to be solved by Wei. In view of the above problems, the inventor of the present invention has a "microdisplay screen and a lenticular lens sheet" which can increase the brightness of a large viewing angle region. SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a microdisplay screen having a sub-convex portion and a lenticular lens sheet, which can increase the brightness of a large viewing angle region. Another object of the present invention is to provide a columnar lens plate having a sub-convex portion which can change the light focusing point of the lenticular lens sheet. For the above purpose, the microdisplay screen according to the present invention comprises a lenticular lens sheet and a Fresnel lens sheet. Here, the lenticular lens sheet has a plurality of lenticular lenses, and the lenticular lens is located on one of the light incident sides of the lenticular lens sheet, and the lenticular lens system has at least one convex portion. The Philippine lens plate is opposed to the lenticular lens plate. In order to achieve the above object, a lenticular lens sheet according to the present invention comprises a plurality of cylindrical lenses which are located on a light incident side, characterized in that the columnar lens systems respectively have at least one convex portion. As described above, according to the microdisplay screen of the present invention and the lenticular lens sheet thereof, the lenticular lens system has at least a sub-protrusion. Compared with the f-knocking technique, the subtractive lens having the sub-convex portion can change the focal length of the portion L to the columnar lens plate. It is possible to focus on a part of the light from the convex portion and then to the area with a larger viewing angle, so that the brightness of the larger viewing area of the camp can be improved. Thus, the gain value of the (four) lens having the sub-convex portion in the larger viewing angle region is larger than that of the conventional lenticular lens. Therefore, users located in a larger viewing area can obtain clearer images due to the increased brightness of the microdisplay's honor screen, thereby improving the quality of the product and solving the problem of insufficient brightness at a larger viewing angle. 4 1258602 [Embodiment] Hereinafter, several embodiments of a microdisplay screen and a lenticular lens sheet according to the present invention will be described with reference to the related drawings. First, please refer to Figs. 2 to 6 to illustrate a microdisplay screen of the first embodiment of the present invention. As shown in Fig. 2, the microdisplay screen 2 includes a lenticular lens sheet 21 and a lenticular lens sheet 22. The lenticular lens sheet 21 has a plurality of lenticular lenses 211, and the lenticular lenses 211 are located on one light incident side 212 of the lenticular lens sheet 21, and the lenticular lenses 211 have at least one convex portion 213, respectively. In the present embodiment, each of the lenticular lenses 211 has a secondary convex portion 213. The material of the 'lenticular lens 211' may be a photocurable resin and may be formed by press-fitting with a roller. The Fresnel lens plate 22 is provided to face the lenticular lens sheet 21. In the present embodiment, the Fresnel lens plate 22 has a Fresnel lens 221, and the Fresnel lens 221 is provided opposite to the plurality of lenticular lenses Hi. The tea is shown in Fig. 3'. In this embodiment, the section of the sub-convex portion 213 parallel to the incident light is a part of a circle. Of course, the cross section of the sub-convex portion 213 parallel to the incident ray may be a part of a triangle, a part of a polygon, or any other shape, as long as the focus of the lenticular lens plate 21 can be changed. The shape of the point can be. Each of the lenticular lenses 211 has a width p. In this embodiment, when the sub-convex portion 213 has a circular cross section, the circular radius length is less than 1/4 of the width p of the lenticular lens 211. In addition, when the 1258602 section of the sub-convex portion 213 is a part of a triangle, the length of the longest side of the triangle is less than 1/4 of the length of the width P; when the section of the sub-convex portion 213 is a part of the polygon, the polygon is the longest The length of the sides is less than 1/4 of the length of the width P. As shown in Fig. 4, the optical path of the incident lens ray of the lenticular lens 211 having the sub-convex portion 213 is simulated. In the present embodiment, the cross-sectional shape of the sub-convex portion 213 is exemplified by a circular shape. It can be seen from the experimental results that the focal length of a portion of the incident light can be changed by the sub-convex portion 213 on the lenticular lens 2u, so that the incident light that is originally focused at the focus point F is incident, because part of the light is incident on the sub-convex portion 213. Focusing on the focus point F and shooting it in the area with a large viewing angle can increase the brightness of the larger viewing area of the screen. As shown in Fig. 5, the cross-sectional shape of the convex portion 213 may be a triangle. As can be seen from FIGS. 4 and 6, the lenticular lens 211 having the sub-convex portion 213 is compared with the control group having no sub-convex portion 213, and the gain value of the lenticular lens 211 having the sub-convex portion 213 is larger than that in the larger viewing angle region. Control group. That is, the luminance of the lenticular lens 211 in the larger viewing angle region is larger than that of the control group. In this way, users located in a larger viewing area can get a clearer image due to the increased brightness of the screen. Next, please refer to Figs. 3 to 7 to explain a lenticular lens sheet according to a second embodiment of the present invention. As shown in Fig. 7, the lenticular lens sheet 30 includes a plurality of lenticular lenses 31, and the lenticular lenses 31 are located on a light incident side 32, wherein the lenticular lenses 31 each have at least one convex portion 311. The function and characteristics of the lenticular lens sheet 30 in this embodiment are the same as those of the lenticular lens sheet 21 in the previous embodiment, and will not be described herein. 1258602 In summary, the microdisplay screen of the present invention and the lenticular lens sheet thereof have a lenticular lens system having at least a sub-protrusion. Compared with the f-knowledge technology, the sub-convex portion of the city is refracted by the partial light to illuminate the focal length of the lens plate. It is possible to focus a part of the light of the sub-convex portion and then shoot it to a region with a large viewing angle, so that the brightness of the larger viewing angle region of the camp can be improved. As a result, it is known that the lenticular lens having the sub-convex portion has a larger gain value in a larger viewing angle region than a conventional lenticular lens. Therefore, users located in such a large area can obtain a clear image due to an increase in the brightness of the microdisplay wire, thereby improving the product f and solving the problem of insufficient brightness in a large viewing area. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a conventional microdisplay screen; FIG. 2 is a schematic view of a microdisplay screen and a lenticular lens sheet thereof; FIG. 3 is a lenticular lens sheet of the present invention. A schematic cross-sectional view of one of the incident light rays, wherein the sub-convex portion is circular; FIG. 4 is a schematic diagram showing one optical path of the optical lens simulation of the lenticular lens and the sub-protrusion of the present invention; FIG. 5 is a parallel view of the lenticular lens plate of the present invention. Another cross-sectional view of the incident ray, wherein the sub-convex portion is triangular; 1258602 Figure 6 is a comparison of the gain values of the lenticular lens sheet of the present invention with a control group; and Figure 7 is a schematic view of one of the lenticular lens sheets of the present invention. Description of component symbols: 1 Microdisplay screen 11 Philippine lens plate 12 Cylindrical lens plate 121 Cylindrical lens 122 Light shielding layer 2 Microdisplay screen 21 Cylindrical lens plate 211 Cylindrical lens 212 Light incident side 213 times convex part 22 Fresnel Lens plate 221 Fresnel lens 30 lenticular lens plate 31 cylindrical lens 311 secondary convex portion 32 light incident side F focus point F, focus point P width 11