Γ375851 101年02月10日梭正翻i頁 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種投影顯示裝置，尤其係關於一種具有繞 射光柵元件之投影顯示裝置。 [先前技術] [0002] 投影儀作為個人電腦及電視機能夠放大視頻之影像並在 螢幕上放映之裝置正得到廣泛地應用。一般液晶光學投 影顯示裝置可依光學元件多少分為：單鏡頭式、雙鏡頭 式以及三鏡頭式三種，如圖1所示，為一種單鏡頭式之投 影顯示裝置，該投影顯示裝置包括一提供光線之燈源21 ’一可反射光線之偏振分光棱鏡22、一具有相位校正功 能之四分之一波板23、一反射式光閥24以及一投影影像 之鏡頭25。其中偏振分光棱鏡22位於燈源21之下方，其 上具有一由左至右傾斜之薄膜221，該薄膜221被失設地 兩玻璃塊222之間，借此構成一個使不同偏振光反射或透 射之立方體。也就是說，該偏振分光棱鏡22可讓p偏振光Γ375851 On the 10th of February, 2010, the shuttle is turning over the page. VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a projection display device, and more particularly to a projection display device having a diffraction grating element. [Prior Art] [0002] A projector is widely used as a device for amplifying video images on a screen and as a personal computer and a television. Generally, the liquid crystal optical projection display device can be divided into three types according to the optical component: single lens type, double lens type and three lens type. As shown in FIG. 1 , it is a single lens type projection display device, and the projection display device includes a provided The light source 21' is a polarizing beam splitting prism 22 that reflects light, a quarter wave plate 23 with a phase correcting function, a reflective light valve 24, and a lens 25 for projecting images. The polarizing beam splitting prism 22 is located below the light source 21 and has a film 221 inclined from left to right. The film 221 is offset between the two glass blocks 222, thereby forming a different polarized light for reflection or transmission. The cube. That is, the polarization beam splitting prism 22 allows p-polarized light
線通過，但將S偏振光線反射，而該四分之一波板23及反 射光閥24都位於偏振分光棱鏡22之一側，鏡頭25則位於/ 偏振分光棱鏡22之相對於所述波板23及反射光間24之另 一側 [0003] 當燈源21投射出S偏振光線時’光線在到達偏振分光棱鏡 22之薄膜221時’分向四分之一波板23反射，第一次通過 波板23後再投射到反射光閥24上。當反射光閥24呈開啟 狀態時，S偏振光線會反射並轉換成p偏振態，然後反向 第二次通過波板23後造成如同通過一次二分之皮板之 單编號A0101 第3頁/共12頁 1013049418-0 1375851 101年02月10日梭正替換頁 功能，達到調整光線相位之目的，而後經偏振分光棱鏡 22，最後到達鏡頭25投影顯像。相反，在反射光閥24關 閉時，S偏振光線經偏振分光棱鏡22的薄膜221反射時， 同樣經過波板23到達反射光閥24，經由反射光閥24的反 射，光線會依原來路徑反射回去，也就是光線無法穿過 薄膜221到達鏡頭25 » [0004]上述的投影顯示裝置由於玻璃222在製造上會有熱應力殘 留，當光線投射路徑經過熱應力殘留之區域時，光線產 生之折射角度會有所不同，且光線行經玻璃222之玻璃塊 | 越大，其偏離之折射角度會越大，這將使得鏡頭25所呈 現影像顏色均勻度降低。同時，因為有部分光被偏振分 光棱鏡22反射出去，沒有被利用，使得光之利用率降低 【發明内容】 圆有鑒於此，有必要提供—種能夠提高影像均勻度及光之 利用率之投影顯示裝置乂 [0006] -種投影顯tf裝置’其包括沿光路依次設置之一光樹元 件，用於將其職收之人射光分成紅、綠、藍三種顏色The line passes, but the S-polarized light is reflected, and the quarter-wave plate 23 and the reflected light valve 24 are both located on one side of the polarization beam splitting prism 22, and the lens 25 is located at / the polarization beam splitting prism 22 opposite to the wave plate 23 and the other side of the reflected light 24 [0003] When the light source 21 projects the S-polarized light, the light rays are reflected toward the quarter-wave plate 23 when the light reaches the film 221 of the polarizing beam splitting prism 22, for the first time. After passing through the wave plate 23, it is projected onto the reflected light valve 24. When the reflected light valve 24 is in an open state, the S-polarized light is reflected and converted into a p-polarized state, and then reversed for the second time through the wave plate 23, resulting in a single number A0101 on page 3 of the first-half of the skin. A total of 12 pages 1013049418-0 1375851 On February 10, 101, the shuttle was replacing the page function to achieve the purpose of adjusting the light phase, and then passed through the polarization beam splitting prism 22, and finally reached the lens 25 to project the image. On the contrary, when the reflected light valve 24 is turned off, the S-polarized light is reflected by the film 221 of the polarization beam splitting prism 22, and also passes through the wave plate 23 to reach the reflected light valve 24, and the light is reflected back through the original path through the reflection of the reflected light valve 24. That is, light cannot pass through the film 221 to reach the lens 25 » [0004] The above-mentioned projection display device has thermal stress residual in the manufacture of the glass 222, and the angle of refraction of the light when the light projection path passes through the region where the thermal stress remains. It will be different, and the larger the glass block of light passing through the glass 222, the larger the angle of refraction will be, which will cause the image uniformity of the image displayed by the lens 25 to decrease. At the same time, since part of the light is reflected by the polarization beam splitting prism 22, it is not utilized, so that the utilization of light is lowered. [Inventive content] In view of this, it is necessary to provide a projection capable of improving image uniformity and utilization of light. Display device [0006] - a projection display tf device comprising a light tree element arranged in sequence along the optical path for dividing the light of the person in charge thereof into three colors of red, green and blue
之光並發射出去以及一液晶 面板，設置於所述光柵元件 之出射光路上，用於為其所接收之入射光載人圖像訊息 並發射載入有圖像訊息之出射光。 [_與先前技術相比，上述投影顯示裝置則光柵元件之分 09614450产單编號 光功能不會㈣有熱應力之存在而產生折射角度之 k將提间所呈現影像顏色均句度而且因所有由 ^發射之光料到了彻，㈣提高了該投影顯 AU1U1 ^ λ . 1013049418-0 第4頁/共12頁 Γ375851 101年.02月10日修正替換頁 置之光之利用率。 【實施方式】 [0008] 下面將結合附圖，舉以下較佳實施方式並配合圖式詳細 描述如下。 [0009] 請參閱圖2，其為本發明提供之投影顯示裝置10之結構示 意圖。該投影顯示裝置10包括沿光路依次設置之一光源 組件11，一設置於所述光源元件Π之出射光路上之光柵 元件12，一設置於所述光柵元件丨2之出射光路上之液晶 面板13以及一設置於所述液晶面板13之出射光路上之投 影鏡頭14。 [〇〇1〇] 所述光源組件11用於為該投影顯示裝置1〇提供光線，其 包括依光路設置之一照明光源111、以及一積分器112。 所述照明光源111發射包括顯示彩色圖像所需之紅光（R) 、綠光（G)及藍光（B)之白光。該照明光源111可以為鹵 素燈、金屬鹵化物燈、氙燈或LED等。在本實施方式中，The light is emitted and a liquid crystal panel is disposed on the outgoing light path of the grating element for carrying the image information of the incident light received therefrom and emitting the emitted light loaded with the image information. [_Compared with the prior art, the above-mentioned projection display device has the grating element component 09614450, the single-numbered light function does not (4) the presence of thermal stress and the refraction angle k will present the image color uniformity and the cause of the image. All the light emitted by ^ is completed, (4) The projection AU1U1 ^ λ is improved. 1013049418-0 Page 4 of 12 Γ 375851 101. On February 10, the utilization rate of the replacement page is corrected. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0008] The following preferred embodiments will be described in detail below with reference to the accompanying drawings. Please refer to FIG. 2, which is a schematic diagram of the structure of a projection display device 10 provided by the present invention. The projection display device 10 includes a light source assembly 11 disposed along the optical path, a grating element 12 disposed on the outgoing light path of the light source element ,, and a liquid crystal panel 13 disposed on the outgoing light path of the grating element 丨2. And a projection lens 14 disposed on the outgoing light path of the liquid crystal panel 13. [光源1〇] The light source unit 11 is configured to provide light to the projection display device 1 , which includes an illumination source 111 disposed in accordance with the optical path, and an integrator 112. The illumination source 111 emits white light including red (R), green (G), and blue (B) required to display a color image. The illumination source 111 can be a halogen lamp, a metal halide lamp, a xenon lamp or an LED or the like. In the present embodiment,
[0011] 該照明光源111為函素燈。所述積分器112用來均勻化及 有敫地使用照明光源111發出之光。 厂光樹元件12玎以為透射式光柵’也可以為繞射式光 所述光柵元件可以通過在平面或凹面鏡上刻上複數 柵0 ip·行 細敏且等寬等距之狹縫而形成一個光柵模型，再在 模型上面注入一層膠棉溶液，待該膠棉溶液凝固 取下與模型一致的這層膠棉膜’固定於兩玻璃片 之 後 中間 ，便成為一個透射式光栅。若將取下之膠棉膜固定 單祕A〇101 磁表面上，則成為燒射式光栅°在本實施方式中’ •來柵元件12為一個繞射式光柵。當光照射所述光柵 所述 第5頁/共12頁 1013049418-0 1375851 101年02月10日修正替換頁 元件12時，該光柵元件12利用其上刻畫之狭缝而產生光 程差，從而產生不同波長之光譜，通過狹縫之寬度以及 狹缝之間距之設置，可將入射光分成紅、綠、藍三種顏 色的光，並且通過所述金屬表面將該红、綠、藍三種光 反射出去。 [0012] 所述液晶面板13包括微透鏡陣列1 31與液晶顯示元件1 32 。所述微透鏡陣列131位於液晶顯示元件132之入射面一 側，該微透鏡陣列131包括複數微透鏡，微透鏡與液晶顯 示元件132中之像素一一對應。利用該微透鏡陣列131之 匯聚作用，來提高該液晶面板13之出射光之亮度。同時 利用為所述液晶顯示元件132所載入之電訊號，控制液晶 顯示元件132内部之液晶分子之旋轉，從而控制紅、綠、 藍三色光之通過率，以形成攜帶圖像訊息之三色光並出 射。[0011] The illumination source 111 is a light element. The integrator 112 is used to homogenize and illuminate the light emitted by the illumination source 111. The factory light tree element 12 玎 透射 透射 透射 透射 透射 透射 透射 透射 透射 ' ' ' 绕 绕 绕 绕 绕 绕 绕 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述 所述The model is then injected with a layer of cotton wool solution on the model. After the cotton wool solution is solidified, the layer of the rubber film which is consistent with the model is fixed in the middle of the two glass sheets, and becomes a transmissive grating. If the removed rubber film is fixed on the magnetic surface of the single-shell A〇101, it becomes a burn-in grating. In the present embodiment, the gate element 12 is a diffraction grating. When the light illuminates the grating, the fifth page/total 12 pages 1013049418-0 1375851, the modified page element 12 is modified on February 10, 101, the grating element 12 uses the slits drawn thereon to generate an optical path difference, thereby Generating spectra of different wavelengths, the incident light can be divided into three colors of red, green and blue by the width of the slit and the distance between the slits, and the red, green and blue light are reflected by the metal surface Go out. [0012] The liquid crystal panel 13 includes a microlens array 1 31 and a liquid crystal display element 1 32 . The microlens array 131 is located on one side of the incident surface of the liquid crystal display element 132. The microlens array 131 includes a plurality of microlenses, and the microlenses are in one-to-one correspondence with the pixels in the liquid crystal display element 132. The brightness of the light emitted from the liquid crystal panel 13 is increased by the convergence of the microlens array 131. At the same time, by using the electrical signal loaded by the liquid crystal display element 132, the rotation of the liquid crystal molecules inside the liquid crystal display element 132 is controlled, thereby controlling the transmittance of the three colors of red, green and blue light to form a three-color light carrying the image information. And out.
[0013] 所述投影鏡頭14設置於所述液晶面板13之出射光路上， 用於將出射光所形成之圖像放大，並將放大之圖像投影 到螢幕（圖未示）上。 [0014] 與先前技術相比，上述之投影顯示裝置利用光柵元件之 分光功能不會因為有熱應力之存在而產生折射角度會不 同，這將提高投影鏡頭所呈現影像顏色均勻度，而且因 所有由光源元件發射之光都得到了利用，從而提高之該 投影顯示裝置之光之利用率。 [0015] 综上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施方式，本 09_0脊單编號A0101 第6頁/共12頁 1013049418-0 1375851 ιοί年.02月10日修正替換頁 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技 藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 [0016] 圖1係先前之一種投影顯示裝置之結構示意圖。 [0017] 圖2係本發明實施方式提供之一種投影顯示裝置之結構示 意圖。 【主要元件符號說明】[0013] The projection lens 14 is disposed on an outgoing light path of the liquid crystal panel 13 for amplifying an image formed by the emitted light, and projecting the enlarged image onto a screen (not shown). [0014] Compared with the prior art, the above-mentioned projection display device utilizes the light splitting function of the grating element without different refractive angles due to the presence of thermal stress, which will improve the image color uniformity exhibited by the projection lens, and Light emitted by the light source element is utilized to increase the light utilization of the projection display device. [0015] In summary, the present invention complies with the requirements of the invention patent, and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and this 09_0 ridge number A0101 page 6 / 12 pages 1013049418-0 1375851 ιοί年. February 10th revised replacement page invention scope is not The above-described embodiments are intended to be within the scope of the following claims, and equivalent modifications or variations in the spirit of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS [0016] FIG. 1 is a schematic structural view of a projection display device of the prior art. 2 is a schematic structural view of a projection display device according to an embodiment of the present invention. [Main component symbol description]
[0018] 投影顯示裝置：10 [0019] 光源組件：11 [0020] 光源：111 [0021] 積分柱：112 [0022] 光柵元件：12 [0023] 液晶面板· 1 3 [0024] 微透鏡陣列：131 [0025] 液晶顯示元件.13 2 [0026] 投影鏡頭：14 [0027] 燈源：21 [0028] 偏振分光棱鏡· 22 [0029] 薄膜：221 [0030] 玻璃塊：222 09614450#單編號删1 第7頁/共12頁 1013049418-0 1375851 __ 101年02月10日核正替^頁 [0031] 波板：23 [0032] 反射光閥：24 [0033] 鏡頭：25[0018] Projection display device: 10 [0019] Light source assembly: 11 [0020] Light source: 111 [0021] Integral column: 112 [0022] Grating element: 12 [0023] Liquid crystal panel · 1 3 [0024] Microlens array: 131 [0025] Liquid crystal display element. 13 2 [0026] Projection lens: 14 [0027] Light source: 21 [0028] Polarizing beam splitting prism · 22 [0029] Film: 221 [0030] Glass block: 222 09614450 #单编号1 Page 7 / Total 12 pages 1013049418-0 1375851 __ February 10, 2010 Nuclear replacement ^ Page [0031] Wave plate: 23 [0032] Reflective light valve: 24 [0033] Lens: 25
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