1274228 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種光學元件與投影螢幕，尤其指可气 控垂直視角之光學元件與投影螢幕。 週 【先前技術】1274228 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to an optical component and a projection screen, and more particularly to an optical component and a projection screen that can be controlled by a vertical viewing angle. Week [prior art]
背投式顯示器係以其大螢幕、圖像清晰爲特色，與傳 統利用映像管之顯示器相比，背投式顯示器除了具有無_ 射、晝面尺寸大等優點外，更可直接接上電腦或是其他影 音設備，達到最大的娛樂效果。因此，隨著生活水準的提 高和居住條件的改善，背投式顯示器愈來愈受到消費者的 青睞。 、 背投影顯示器按照投影技術來區分，可以分成陰極射 線管（Cathode Ray Tube，CRT)投影技術、以及微顯示琴 (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0 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。 1274228 請參照圖ΙΑ，螢幕1主要係由一菲涅耳透鏡板u與 一柱狀透鏡12所構成。其中，當一光源所發出的入射光 先射入菲涅耳透鏡板11以聚光形成平行光，接著再射至 柱狀透鏡12之入光側，係藉由柱狀透鏡12上複數個單元 稜鏡121聚光，再由柱狀透鏡12之出光侧以一角度射出， 此範圍即為觀看者可看到影像的範圍，用以提昇影像的亮 度均勻度，並使得視域内的光線能做良好的運用，此外再 # 請參照圖1A，柱狀透鏡12之出光側塗佈一遮光層13，其 係用以反射光線。上述之柱狀透鏡12為一維設計之柱狀 透鏡，因此螢幕1只能調控水平方向的光線分佈，無法調 控垂直方向的光線，因此更有如圖中之螢幕1，，此螢 幕1主要係由一菲涅耳透鏡板u與一柱狀透鏡12以及一 另一柱狀透鏡12’所構成，其中柱狀透鏡12與另一柱狀透 鏡12分為一維設計之柱狀透鏡，此外，柱狀透鏡12與另 _ 一柱狀透鏡12’上的複數個單元稜鏡121為不同方向設' 置，使得柱狀透鏡12與另一柱狀透鏡12，分別用以控制水 平垂直方向之光線分佈，當一光源所發出的入射光先射入 菲淫耳透鏡板η以聚光形成平行光，接著穿過柱狀透鏡 -12與另一柱狀透鏡12，，可藉由柱狀透鏡12與另一柱狀透 鏡12’上之複數單元稜鏡121 |光，上述之柱狀透鏡12用 以e周控水平方向的光線分佈，另一柱狀透鏡12，用以調控 垂直方向的光線，以提昇影像的亮度均句度，並使得視域 内的光線能做良好的運用，但是上述之勞幕j，由於需要多 增加另-柱狀透鏡加以控制垂直方向之光線，進而導致敕 1274228 個螢幕的成本提高。 因此，如何提供可調控垂直視角之光學元件與投影螢 幕，並且又不增加額外的成本，乃成為製造廠商致力要解 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 以調控垂直視角之「光學元件以及投影螢幕」。 Φ 【發明内容】 有鑑於上述課題，本發明之目的為提供一種可調控水 平與垂直視角的光學元件與投影螢幕。 緣是’為達上述目的’依本發明之光學元件’包含一 本體以及一遮光層。其中本體具有一第一表面，於第一表 面之一第一方向上，第一表面係具有複數個第一溝槽，以 及於第一表面之一第二方向上，第一表面係具有複數個第 二溝槽，遮光層塗佈於第一溝槽與第二溝槽内。 • 緣是，為達上述目的，依本發明之投影螢幕，包含一 菲涅耳透鏡以及一光學元件。其中光學元件與菲涅爾透鏡 相對而設，光學元件包含一本體與一遮光層，本體具有一 第一表面，於第一表面之一第一方向上，第一表面具有複 數個第一溝槽，於第一表面之一第二方向上，第一表面具 有複數個第二溝槽。遮光層塗佈於第一溝槽與第二溝槽 内。 承上所述，於本發明之光學元件以及投影螢幕，其係 於第一表面設有第一溝槽與第二溝槽，以形成二維設計之 1274228 光學元件，並且遮光槽塗佈於第一溝槽與第二溝槽内，且 此遮光層係為一不透光物質。與習知技術相比，本發明利 用二維之光學元件來增加垂直方向之視角且不需要另外 增加一光學元件即可達到增加垂直方向之視角之功效，具 有降低生產成本之優點。 【實施方式】 以下將參照相關圖式，說明依本發明較佳實施例之光 學元件以及投影螢幕，其中相同的元件將以相同的參照符 號加以說明。 請參閱圖2所示，依本發明較佳實施例之光學元件2 包含一本體20以及一遮光層21。其中，本體20具有一第 一表面201以及一第二表面202，第一表面201與第二表 面202相對向設置。在此較佳實施例中，在第一表面201 之一第一方向91上，第一表面201具有複數個第一溝槽 2011，在第一表面201之一第二方向92上，第一表面201 係具有複數個第二溝槽2012。 在此較佳實施例，第一方向91與第二方向92兩者互 相垂直，以及第一溝槽2011與第二溝槽2012垂直交錯在 且在第一表面201形成複數個出光區2013。遮光層21其 係塗佈於第一溝槽2011與第二溝槽2012内，用以反射光 線。 如圖2所示，於本較佳實施例中，第一溝槽2011與 第二溝槽2012的剖面可為一三角形，雖然在此實施例中， 1274228 第一溝槽2011與第二溝槽2012分別呈現三角形之形狀， 但本發明並不限定於此，第一溝槽2011與第二溝槽2012The rear-projection display features a large screen and clear image. Compared with the traditional display with a video tube, the rear-projection display can be directly connected to the computer in addition to the advantages of no radiation and large size. Or other audio and video equipment to achieve maximum entertainment. Therefore, with the improvement of living standards and the improvement of living conditions, rear-projection displays are increasingly favored by consumers. The rear projection display is divided 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 advancement of video technology and market demand, in recent years, the Microdisplay Screen has been widely used in the back. The display screen of the Rear Projection TV, the Monitor Screen, and the Multi-screen Installation. 1274228 Referring to the figure, the screen 1 is mainly composed of a Fresnel lens plate u and a cylindrical lens 12. Wherein, the incident light emitted by a light source is first incident on the Fresnel lens plate 11 to collect light to form parallel light, and then incident on the light incident side of the lenticular lens 12 by a plurality of cells on the lenticular lens 12 The 稜鏡121 condenses light, and then the light exiting side of the lenticular lens 12 is emitted at an angle, which is a range in which the viewer can see the image, thereby improving the brightness uniformity of the image and enabling the light in the field of view to be made. Good use, in addition, please refer to FIG. 1A, a light-shielding layer 13 is applied to the light-emitting side of the lenticular lens 12 for reflecting light. The above-mentioned lenticular lens 12 is a cylindrical lens of one-dimensional design, so the screen 1 can only regulate the distribution of light in the horizontal direction, and can not regulate the light in the vertical direction. Therefore, there is a screen 1 as shown in the figure, and the screen 1 is mainly composed of A Fresnel lens plate u is formed by a cylindrical lens 12 and a further cylindrical lens 12', wherein the cylindrical lens 12 and the other cylindrical lens 12 are divided into a one-dimensional cylindrical lens, and in addition, the column The lens 12 is disposed in a different direction from the plurality of cells 121 on the other lenticular lens 12', so that the lenticular lens 12 and the other lenticular lens 12 are respectively used to control the horizontal and vertical light distribution. When the incident light emitted by a light source is first incident on the spectacles lens η to collect the parallel light, and then passes through the lenticular lens -12 and the other lenticular lens 12, the lenticular lens 12 can be used. The lenticular lens 12 on the other lenticular lens 12' is used to control the horizontal light distribution in the horizontal direction, and the lenticular lens 12 is used to regulate the vertical light. Increase the brightness of the image to a uniform degree and make it within the field of view Rays do good use, but the above-described curtain of labor j, due to the need to add another multi - lenticular lens is controlled in the vertical direction of the light, thereby resulting in cost increase Chile 1,274,228 screen. Therefore, how to provide optical components and projection screens with adjustable vertical viewing angles without additional cost is an important issue that manufacturers are trying to solve. In view of the above problems, the inventor of the present invention is therefore concerned with an "optical component and a projection screen" which can control a vertical viewing angle. Φ SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an optical element and a projection screen that can adjust horizontal and vertical viewing angles. The edge is 'for the above purpose' and the optical element ‘ according to the invention comprises a body and a light shielding layer. Wherein the body has a first surface, in a first direction of the first surface, the first surface has a plurality of first grooves, and in a second direction of the first surface, the first surface has a plurality of The second trench is coated in the first trench and the second trench. • The edge is that, for the above purpose, the projection screen according to the present invention comprises a Fresnel lens and an optical element. The optical component is opposite to the Fresnel lens. The optical component comprises a body and a light shielding layer. The body has a first surface. The first surface has a plurality of first trenches in a first direction of the first surface. The first surface has a plurality of second trenches in a second direction of the first surface. The light shielding layer is coated in the first trench and the second trench. According to the above, the optical component and the projection screen of the present invention are provided with a first trench and a second trench on the first surface to form a 1274228 optical component of a two-dimensional design, and the light shielding groove is coated on the first a groove and a second groove, and the light shielding layer is an opaque substance. Compared with the prior art, the present invention utilizes a two-dimensional optical element to increase the viewing angle in the vertical direction and does not require an additional optical component to achieve the effect of increasing the viewing angle in the vertical direction, which has the advantage of reducing the production cost. [Embodiment] Hereinafter, an optical element and a projection screen according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals. Referring to FIG. 2, an optical component 2 according to a preferred embodiment of the present invention includes a body 20 and a light shielding layer 21. The body 20 has a first surface 201 and a second surface 202. The first surface 201 is disposed opposite to the second surface 202. In the preferred embodiment, in a first direction 91 of the first surface 201, the first surface 201 has a plurality of first grooves 2011, and in a second direction 92 of the first surface 201, the first surface The 201 series has a plurality of second grooves 2012. In the preferred embodiment, the first direction 91 and the second direction 92 are perpendicular to each other, and the first trench 2011 and the second trench 2012 are vertically staggered and a plurality of light exit regions 2013 are formed on the first surface 201. The light shielding layer 21 is applied to the first trenches 2011 and the second trenches 2012 for reflecting the light. As shown in FIG. 2, in the preferred embodiment, the cross section of the first trench 2011 and the second trench 2012 may be a triangle, although in this embodiment, 1274228 the first trench 2011 and the second trench 2012 respectively has a triangular shape, but the present invention is not limited thereto, the first groove 2011 and the second groove 2012
的剖面亦可呈一梯形、四邊形、或是其他不規則曲線之形 狀。另外，在此較佳實施例中第一溝槽2011之深度與第 二溝槽2012之深度不相等。於本較佳實施例中，光學元 件2係為二維設計棱鏡，可以同時調控左右水平與上下垂 直的光線。另外，本實施例之遮光層21係為一不透光材 貝，例如一黑漆、一黏者膝與奴粉之混合物或是一金屬（例 如鋁），其中黏著膠可包括熱固膠及光固膠。 本較佳實施例之光學元件2，當一光線自第二表面 2012射入光學元件2時，遮光層21塗佈於第一溝槽 與第二溝槽2012内用以反射光線，俾使光線自複^個 光區2013射出。 請參閱圖3所示，為本發明較佳實施例之投 其係主要由-光學元件2與-菲淫爾透鏡u所組成 學元件2與菲㈣透鏡U相對㈣。並且光學 含—本體20與一遮光層21，本體2〇且有一 ^ 於第-表…第一方向91上，第一有表面第：f面2。1’ 數個第一溝槽2011，於第一表 具有複 楚^ Ui之弟一方向92上， 第—表面201具有複數個第二溝槽2〇12，且上 塗佈於第-溝槽2011與第二溝槽2()12内， :21係 更包含複數個出光區則。當-光源所發出、面2〇1 入菲涅耳透鏡U聚光以形成平行 射光先射 件2之第二表面2〇2且穿過光學元件2用以 件2之坌-主二0 丨一， 按者再射至光學元 聚光，再從第 1274228 一表面201之出光區2013射出，由於光學元件2為二維 設計稜鏡，因此可以同時調控左右水平與上下垂直的光 線，俾使螢幕3可以調控左右水平與上下垂直的視角，使 得視域内的光線能做良好的運用。 為使說明更加清楚，以下將舉例說明光學元件2利用 於投影系統的情況。此投影系統主要包含一單色光源、一 菲涅耳透鏡11以及一光學元件2。光學元件2係與菲涅耳 φ 透鏡11相對而設。光學元件2分別具有第一表面201與 第二表面202，第二表面202係面對菲涅耳透鏡11。單色 光源所發射之光線係穿設菲涅耳透鏡11，且從光學元件2 之第二表面202射入，並由第一表面201射出。第一表面 201包括複數個第一溝槽2011、複數個第二溝槽2012以 及複數個出光區2013，由於本實施例中光學元件之結構、 設置方式及作用皆與前述光學元件中所提及者相同，在此 不再贅述。 • 承上所述，於本發明之光學元件以及投影螢幕，其係 於第一表面設有互相垂直之第一溝槽與第二溝槽且遮光 槽塗佈於第一溝槽與第二溝槽内，此遮光層係為一不透光 物質。與習知技術相比，本發明利用二維設計之光學元件 來增加垂直方向之視角且不需要另外增加一光學元件即 可達到增加垂直方向之視角之功效，具有降低生產成本之 優點。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範_，而對其進行之等效修改或變更’均 10 1274228 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1A以及圖1B為習知之螢幕； 圖2為本發明較佳實施例之光學元件；以及 圖3為本發明較佳實施例之投影螢幕。 > 元件符號說明： 卜1，-螢幕 11- 菲涅耳透鏡板 12- 柱狀透鏡 12’-另一柱狀透鏡 121-單元稜鏡 2-光學元件 20- 本體 > 201-第一表面 2011- 第一溝槽 2012- 第二溝槽 2013- 出光區 202-第二表面 21- 遮光層 91- 第一方向 92- 第二方向 11The profile may also be in the shape of a trapezoid, a quadrangle, or other irregular curve. Further, in the preferred embodiment, the depth of the first trench 2011 is not equal to the depth of the second trench 2012. In the preferred embodiment, the optical element 2 is a two-dimensional design prism that can simultaneously modulate left and right horizontal and vertical vertical rays. In addition, the light shielding layer 21 of the embodiment is an opaque material, such as a black lacquer, a mixture of a sticky knee and a slave powder, or a metal (such as aluminum), wherein the adhesive may include a thermosetting adhesive and Light solid glue. In the optical component 2 of the preferred embodiment, when a light is incident on the optical component 2 from the second surface 2012, the light shielding layer 21 is coated in the first trench and the second trench 2012 to reflect light and illuminate the light. Self-recovering ^ light zone 2013 shot. Referring to Fig. 3, the preferred embodiment of the present invention is mainly composed of an optical element 2 and a Philippine lens u, and a Philippine (four) lens U (4). And the optical body-body 20 and a light shielding layer 21, the body 2 has a first surface 91 in the first table, the first surface has a surface: f surface 2. 1 'a plurality of first grooves 2011, The first table has a plurality of second grooves 2〇12, and the upper surface 201 is coated in the first groove 2011 and the second groove 2()12. , : The 21 series also contains a plurality of light-emitting areas. When the light source emits, the surface 2〇1 enters the Fresnel lens U to condense to form the second surface 2〇2 of the parallel light-emitting precursor 2 and passes through the optical element 2 for the 2-main 2 丨 of the piece 2 First, the person shoots again to the optical element to collect light, and then emits from the light exit area 2013 of the surface 201 of the 1274228. Since the optical element 2 is designed in two dimensions, the left and right horizontal and vertical rays can be simultaneously adjusted. The screen 3 can adjust the left and right horizontal and vertical angles of view, so that the light in the field of view can be used well. In order to make the explanation clearer, the case where the optical element 2 is utilized for the projection system will be exemplified below. The projection system mainly comprises a monochromatic light source, a Fresnel lens 11 and an optical element 2. The optical element 2 is provided opposite to the Fresnel φ lens 11. The optical elements 2 have a first surface 201 and a second surface 202, respectively, and the second surface 202 faces the Fresnel lens 11. The light emitted by the monochromatic light source passes through the Fresnel lens 11 and is incident from the second surface 202 of the optical element 2 and is emitted by the first surface 201. The first surface 201 includes a plurality of first trenches 2011, a plurality of second trenches 2012, and a plurality of light exit regions 2013. The structure, arrangement, and functions of the optical components in the present embodiment are all mentioned in the foregoing optical components. The same is true, and will not be repeated here. In the optical component and the projection screen of the present invention, the first surface and the second groove are perpendicular to each other on the first surface, and the light shielding groove is applied to the first groove and the second groove. In the tank, the light shielding layer is an opaque substance. Compared with the prior art, the present invention utilizes a two-dimensionally designed optical element to increase the viewing angle in the vertical direction and does not require an additional optical component to achieve the effect of increasing the viewing angle in the vertical direction, which has the advantage of reducing the production cost. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the invention may be made without departing from the spirit and scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A and FIG. 1B are conventional screens; FIG. 2 is an optical component according to a preferred embodiment of the present invention; and FIG. 3 is a projection screen of a preferred embodiment of the present invention. > Element symbol description: Bu 1, - Screen 11 - Fresnel lens plate 12 - Cylindrical lens 12' - Another cylindrical lens 121 - Unit 稜鏡 2 - Optical element 20 - Body > 201 - First surface 2011- First groove 2012-Second groove 2013- Light exit area 202-Second surface 21- Light shielding layer 91- First direction 92- Second direction 11