099年12月27日接正替換頁 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種投影儀及其對比度調節裝置，尤其涉及 一種結構簡單之投影儀及其對比度調節裝置。 【先前技術】 [0002] 投影儀作為一種方便實用之影像顯示裝置被廣泛應用於 各種場所中。習知之投影儀一般係將光源發出之光線經 過一系列之光學元件如積分柱、透鏡組等導向液晶屏等 顯示設備，再經該顯示設備調製後之光線經過一系列投 影透鏡裝置投射到螢幕上顯示畫面。其中，為了提高投 影儀之對比度，一般會於所綠投影儀光線輅.徑上設置一 光圈，由該光圈調節光線之強度，從而達到提高對比度 之目的。惟，習知之光圈採治裰is活富葉片結構，即 ，將複數可活動之葉片組合，藉由控制葉片之相對位置 及相對角度，使得複數葉片共構成一大小可變之光孔， 藉由該光孔之變化來控制光通’查從而改變A線強度，從 而改善投影儀之對比度。然而锋種凫圈'結構複雜，生產 工藝複雜，從而使得成本蒿居不下‘，此外該光圈之控制 複雜，從而增加了投影儀之運作之複雜度，對投影儀之 品質產生很大之影響。 【發明内容】 [0003] 有鑒於此，有必要提供一種投影儀對比度調節裝置，可 有效降低成本，同時簡化投影儀之製造及運作。 [0004] 還有必要提供一種應用該投影儀對比度調節裝置之投影 儀。 表單編號A0101 第3頁/共14頁 0993460885-0 1339310 I 093年12月27日择正莨 [0005] —種投影儀對比度調節裝置，其包括一驅動裝置及一液 晶面板。所述液晶面板可供一光源發出之光線穿過，並 可於所述驅動裝置之驅動力下改變其與所述光源所發出 之光線之角度。 [0006] 一種投影儀，其包括一光源以及一對比度調節裝置。所 述對比度調節裝置設置於該投影儀之光源出射後之光線 ^ 路徑中，其包括一驅動裝置及一液晶面板。所述液晶面 ^ 板可供所述光源發出之光線穿過，並可於所述驅動裝置 之驅動力下改變其與光源所發出之光線之角度。 _ [0007] 相較習知技術，該投影儀及其對t匕度調節裝置該投影儀 ， . ' · ·· ··..·.· ·：.·λ· 採用一液晶面板配合一驅動巢丨置，私#液晶^板之視角 特性來實現光訊號之強度之度之調整 ，結構簡單，組裝容易，成本較低，簡化了投影儀之製 造工藝及運作流程。 【實施方式】 ‘ [0008] 請參閱圖1，本發明投影儀之第一較佳實施例之示意圖。[Description of the Invention] [0001] The present invention relates to a projector and a contrast adjustment device thereof, and more particularly to a projector having a simple structure and a contrast adjustment device thereof . [Prior Art] [0002] A projector is widely used in various places as a convenient and practical image display device. Conventional projectors generally direct light from a light source through a series of optical components such as an integrating column, a lens group, etc. to a display device such as a liquid crystal panel, and the light modulated by the display device is projected onto the screen through a series of projection lens devices. Display the screen. In order to improve the contrast of the projector, an aperture is generally arranged on the green projector's light path, and the aperture is adjusted by the aperture to improve the contrast. However, the conventional aperture adopts a blade structure, that is, a combination of a plurality of movable blades, and by controlling the relative positions and relative angles of the blades, the plurality of blades form a variable aperture. The change in the aperture determines the optical path to change the intensity of the A line, thereby improving the contrast of the projector. However, the front type of the circle is complex in structure and complicated in production process, which makes the cost of the artefact not difficult. In addition, the control of the aperture is complicated, which increases the complexity of the operation of the projector and greatly affects the quality of the projector. SUMMARY OF THE INVENTION [0003] In view of the above, it is necessary to provide a projector contrast adjustment device that can effectively reduce costs while simplifying the manufacture and operation of the projector. It is also necessary to provide a projector to which the projector contrast adjusting device is applied. Form No. A0101 Page 3 of 14 0993460885-0 1339310 I December 27, 093. [0005] A projector contrast adjustment device comprising a driving device and a liquid crystal panel. The liquid crystal panel can pass light emitted by a light source and change its angle with the light emitted by the light source under the driving force of the driving device. A projector includes a light source and a contrast adjustment device. The contrast adjusting device is disposed in a light path of the projector after the light source is emitted, and includes a driving device and a liquid crystal panel. The liquid crystal panel can pass light emitted by the light source and can change its angle with the light emitted by the light source under the driving force of the driving device. _ [0007] Compared with the prior art, the projector and the projector for the t-degree adjustment device, . . . . . . . . . . . . . . . . . . . . . . . . . . The perspective characteristics of the nesting and private LCD panels are used to adjust the intensity of the optical signal. The structure is simple, the assembly is easy, and the cost is low, which simplifies the manufacturing process and operation process of the projector. [Embodiment] [0008] Please refer to FIG. 1, a schematic diagram of a first preferred embodiment of the projector of the present invention.
投影儀100主要包括一光源110、一色輪120、一光源透 I 鏡組130、一微鏡片裝置140、一成像透鏡組150、以及 至少一對比度調節裝置160。 [0009] 光源110用以提供光線，其具體結構包括一燈泡及一相對 應之橢圓形燈罩。 [0010] 色輪120用以使光源110所發出之白色光線依時序輪流過 濾成紅色、綠色及藍色光，以使得投影儀投射之成像具 有色彩。 096135476 表單編號A0101 第4頁/共14頁 0993460885-0 1339310 099年12月27日修正替換頁| [0011] 光源透鏡組130用以將光源110之光線導向微鏡片裝置 150，其包括一積分柱132，複數光學鏡片134。其中積 分柱132可使得光線於其中發生全反射而均勻化；被均勻 化之光線藉由光源透鏡組130後端之反射鏡片136將光線 反射至全内反射棱鏡138中；光線經過該全内反射棱鏡 138後以適當之入射角被導入微鏡片裝置140上。可以理 解，上述反射鏡片136之設置目的在於縮小該投影儀之整 體體積，而所述微鏡片裝置140可直接設置於所述光遠透 鏡組130之後而省去所述反射鏡片136。 W [0012] 微鏡片裝置140用以調控光源110所提供之光線以產生光 訊號，該光訊號為微鏡片1'0:板據相應圖像訊號調製所述 光線而產生之承載有圖像資訊之光.線。 [0013] 該光訊號穿過全内反射棱鏡138後被導入成像透鏡組150 。成像透鏡組150包括複數光學鏡片（圖中未示），可將光 訊號聚焦且放大地投射出投影儀100，並成像於投影儀外 部之顯示螢幕上。 • [0014] 對比度調節裝置160設置於'投秦儀内部之光線路徑上，本 實施例中，所述對比度調節裝置160設置於成像透鏡組 150之光學鏡片組中。對比度調節裝置160包括一液晶面 板162以及一驅動裝置164，所述液晶面板162可於驅動 裝置164之驅動下相對光訊號路徑做一定角度之旋轉。該 對比度調節裝置160利用液晶面板162之視角特性配合驅 動裝置164來實現光訊號強度之控制。 [0015] 請一併參閱圖2及圖3，圖2為光線透過對比度調節裝置 096135476 表單編號A0101 第5頁/共14頁 0993460885-0 1339310The projector 100 mainly includes a light source 110, a color wheel 120, a light source lens array 130, a microlens device 140, an imaging lens group 150, and at least one contrast adjusting device 160. The light source 110 is configured to provide light, and the specific structure includes a bulb and a corresponding elliptical lampshade. [0010] The color wheel 120 is configured to filter the white light emitted by the light source 110 into red, green and blue light according to the timing, so that the image projected by the projector has color. 096135476 Form No. A0101 Page 4 of 14 0993460885-0 1339310 December 27, 2017 Correction Replacement Page | [0011] The light source lens set 130 is used to direct the light of the light source 110 to the microlens device 150, which includes an integrating column 132, a plurality of optical lenses 134. The integrating column 132 can homogenize the light in which the light is totally reflected; the light that is homogenized reflects the light into the total internal reflection prism 138 by the reflecting lens 136 at the rear end of the light source lens group 130; the light passes through the total internal reflection The prism 138 is then introduced into the microlens device 140 at an appropriate angle of incidence. It can be understood that the above-mentioned reflective lens 136 is arranged to reduce the overall volume of the projector, and the microlens device 140 can be disposed directly after the light remote lens group 130 to omit the reflective lens 136. [0012] The microlens device 140 is configured to regulate the light provided by the light source 110 to generate an optical signal, and the optical signal is a microlens 1'0: the board generates the image information according to the corresponding image signal to modulate the light. Light. Line. [0013] The optical signal passes through the total internal reflection prism 138 and is guided to the imaging lens group 150. The imaging lens set 150 includes a plurality of optical lenses (not shown) that focus and magnify the optical signals out of the projector 100 and image them on a display screen external to the projector. [0014] The contrast adjusting device 160 is disposed on the light path inside the projector, and in the embodiment, the contrast adjusting device 160 is disposed in the optical lens group of the imaging lens group 150. The contrast adjustment device 160 includes a liquid crystal panel 162 and a driving device 164 that can be rotated at an angle relative to the optical signal path by the driving device 164. The contrast adjusting device 160 uses the viewing angle characteristic of the liquid crystal panel 162 in conjunction with the driving device 164 to control the optical signal intensity. [0015] Please refer to FIG. 2 and FIG. 3 together, FIG. 2 is a light transmission contrast adjusting device 096135476 Form No. A0101 Page 5 of 14 0993460885-0 1339310
的5年12月27H 160中之液晶面板162之示意圖，其中入射光線為I，出射 光線為0。圖3為液晶面板162之視角特性曲線，其中橫轴 代表液晶面162板相對於垂直穿過該液晶面板162之光線 之角度0，縱軸代表光訊號由液晶面板162出射之強度l 。從圖3種可以看出，經由液晶面板16 2出射之光訊號強 度隨著該液晶面板1 6 2與光訊號之角度0之增大而減小， 藉由液晶面板1 6 2之視角特性配合所述驅動裝置16 4從而 精確控制液晶面板與光線之角度從而調整光訊號之對比 度。所述驅動裝置164可以係任意一種驅動電機或者驅動 馬達如步進電機或壓電馬達等》 # [0016] 本實施例中，採用一液晶面己合一鸯裝置164來 實現光訊號之強度之控制從:度^整，結構 簡單，組裝容易’成本較低，簡化了投影機之製造工藝 及運作流程。 [0017]A schematic diagram of a liquid crystal panel 162 in December 27, 2005, in which the incident light is I and the outgoing light is zero. 3 is a viewing angle characteristic curve of the liquid crystal panel 162, wherein the horizontal axis represents the angle 0 of the liquid crystal panel 162 with respect to the light passing through the liquid crystal panel 162 vertically, and the vertical axis represents the intensity l of the optical signal emitted from the liquid crystal panel 162. As can be seen from FIG. 3, the intensity of the optical signal emitted through the liquid crystal panel 16 2 decreases as the angle 0 of the liquid crystal panel 162 and the optical signal increases, and the viewing angle characteristic of the liquid crystal panel 162 is matched. The driving device 16 4 thus precisely controls the angle of the liquid crystal panel and the light to adjust the contrast of the optical signal. The driving device 164 can be any kind of driving motor or driving motor such as a stepping motor or a piezoelectric motor. [0016] In this embodiment, a liquid crystal surface unit 164 device is used to realize the intensity of the optical signal. The control is: the degree is complete, the structure is simple, the assembly is easy, the cost is low, and the manufacturing process and operation flow of the projector are simplified. [0017]
可以理解，上述投影儀1 0 0中之對比度調節裝置丨6 〇亦可 以設置於該投影儀100中先線路徑上之任意位置從而達到 調整投影儀1 〇 〇之對比度效羊，如設置於光源透鏡組丨3 0 中。此外，亦可於投影儀100中之光源透鏡組13〇及成像 透鏡組150中均設置一對比度調節裝置，這種實施方式可 使得投影儀1〇〇之對比度之可調性更高。 [0018] 4參閱圖4，本發明投影儀之第二較佳實施例之示意圖。 該投影儀200與投影儀1〇〇相似，相同之元件採用相同之 標號，於此將不再次冗述。其不同在於投影儀200還包括 —環境亮度檢測裝置210、一投影亮度檢測裝置22〇、一 096135476 π度比較電路230、一對比度調節裝置控制電路24〇以及 表單編號A0101 第6頁/共14頁 0993460885-0 099年12月27日梭正替换頁 一螢幕260。 [0019] 環境亮度檢測裝置210用以檢測投影儀200之週圍之亮度 ，並將檢測結果輸出至亮度比較裝置230中。 [0020] 投影亮度檢測裝置220用以檢測投影儀200於螢幕260上 之投影之亮度，並將檢測結構輸出至亮度比較裝置230中 〇 [0021] 亮度比較裝置230用以比較由環境亮度檢測裝置210及投 影亮度檢測裝置220所檢測亮度，並將比較結果輸出至對 比度調節裝置控制電路240中。 [0022] 對比度調節裝置控制電路2 4 0::，用以根據亮度比較裝置 '' •' j 230之比較結果控制驅動裝置)i6④藏轉，帶動液晶面板 162轉過角度0，從而調整投影儀200之對比度。該對比 度調節裝置控制電路240中預存有根據液晶面板162之視 角特性旋轉之角度相對於亮度對，比結果之亮度差，對應 ί · ί'· · ' , 亮度差進行對比度調節裝置.160控制之對照表。對照表之 具體内容可設置如下，當投影:像於螢幕上之亮度相對於 :· >*.·.. ·-， ·. 室内之亮度不夠充分明亮之情況下，於液晶面板162與光 線夾角之方向驅動驅動裝置164。上述對照表之内容可根 據不同之液晶面板1 62之視角特性以及不同之需求而設置 不同之内容，如可預存不同之亮度差所對應之驅動裝置 之旋轉角。從而可使對比度調節裝置控制電路240能夠根 據亮度比較裝置2 3 0所輸出之比較結果精確之輸出控制訊 號，並控制驅動裝置164旋轉實現對比度之自動調節。 [0023] 可以理解，上述實施例中，所述對比度調節裝置控制電 表單編號Α0101 第7頁/共14頁 0993460885-0 1339310 I a ·· · 一 — V- *Λ— * » · Λ- -賢It can be understood that the contrast adjustment device 丨6 中 in the projector 100 can also be disposed at any position on the first line path of the projector 100 to adjust the contrast effect of the projector 1 , such as the light source. The lens group is 丨3 0 . In addition, a contrast adjustment device may be disposed in both the light source lens group 13A and the imaging lens group 150 in the projector 100. This embodiment can make the contrast of the projector 1 可调 more adjustable. 4 is a schematic view of a second preferred embodiment of the projector of the present invention. The projector 200 is similar to the projector 1 ,, and the same components are denoted by the same reference numerals and will not be redundantly described herein. The difference is that the projector 200 further includes an ambient brightness detecting device 210, a projected brightness detecting device 22, a 096135476 π degree comparing circuit 230, a contrast adjusting device control circuit 24, and a form number A0101. Page 6 of 14 0993460885-0 On December 27, 099, Shuttle was replacing page 260. [0019] The ambient brightness detecting device 210 is configured to detect the brightness of the surroundings of the projector 200 and output the detection result to the brightness comparing device 230. [0020] The projection brightness detecting device 220 is configured to detect the brightness of the projection of the projector 200 on the screen 260, and output the detecting structure to the brightness comparing device 230. [0021] The brightness comparing device 230 is used to compare the ambient brightness detecting device. The brightness detected by the projection brightness detecting device 220 is 210, and the comparison result is output to the contrast adjusting device control circuit 240. [0022] The contrast adjustment device control circuit 2 4 0:: is used to control the driving device according to the comparison result of the brightness comparison device '' • ' j 230 ), and the liquid crystal panel 162 is rotated by the angle 0 to adjust the projector. 200 contrast. The contrast adjusting device control circuit 240 prestores an angle of rotation according to the viewing angle characteristic of the liquid crystal panel 162 with respect to the brightness pair, and the brightness difference of the result is corresponding to ί · ί '· · ', and the brightness difference is controlled by the contrast adjusting device 160. Chart. The specific contents of the comparison table can be set as follows when the projection: the brightness on the screen is relative to: · >*.·.. ·-, ·. If the brightness of the room is not sufficiently bright, the liquid crystal panel 162 and the light The drive unit 164 is driven in the direction of the included angle. The contents of the above-mentioned comparison table can be set according to the viewing angle characteristics of different liquid crystal panels 1 62 and different needs, such as the rotation angle of the driving device corresponding to different brightness differences. Thereby, the contrast adjusting means control circuit 240 can accurately output the control signal based on the comparison result output from the brightness comparing means 230, and control the rotation of the driving means 164 to realize the automatic adjustment of the contrast. [0023] It can be understood that, in the above embodiment, the contrast adjustment device controls the electric form number Α0101, page 7 / total 14 pages 0993460885-0 1339310 I a · · · one - V - * Λ - * » · Λ - - Yin
I 丄/刀匕7 p I 路2 4 0係根據檢測裝置21與影亮度檢測裝置2 2 0所檢測之 亮度差進行對比度之調整，而與投影亮度相比，環境亮 度對投影像之對比度之影響更大，因此，上述實施例中 亦可僅僅檢測環境亮度值，根據環境亮度值來驅動驅動 裝置164從而達到調節對比度之效果。 [0024] 可以理解，所述之對比度調節裝置亦可用應用於其他結 ' 構之投影儀中，如用於LCD或者LCOS投影儀中。其中，所 _ 述對比度調節裝置設置於投影儀之光源之後之光徑中即 可。 · [0025] 綜上所述，本發明符合發明專利暑.件，爰依法提出專利 上所述者僅為本繼翻条#佳貪魏方式 φ 發明之範圍並不以上述實施着1式悉本 申請。惟，以 ，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】 [0026] 圖1係本發明投影儀第一較佳實施例之示意圖； [0027] 圖2係圖1中之投影儀中光線穿過液晶面板之示意圖； [0028] 圖3係圖1中之液晶面板之視角特性曲線圖； [0029] 圖4係本發明投影儀第二較佳實施例之示意圖。 【主要元件符號說明】 [0030] (本發明） [0031] 投影儀：100、200 [0032] 光源：110 096135476 表單編號 A0101 第 8 頁/共 14 頁 0993460885-0 1339310 [0033] [0034] [0035] [0036] [0037] [0038] [0039] 099年12月27日修正替換頁I 丄 / 匕 7 p I 2 2 4 0 The contrast is adjusted according to the difference in brightness detected by the detecting device 21 and the brightness detecting device 2 20, and the contrast of the ambient brightness versus the projected image is compared with the projected brightness. The effect is greater. Therefore, in the above embodiment, only the ambient brightness value may be detected, and the driving device 164 is driven according to the ambient brightness value to achieve the effect of adjusting the contrast. [0024] It will be appreciated that the contrast adjustment device described can also be used in other projectors, such as in LCD or LCOS projectors. Wherein, the contrast adjusting device is disposed in the optical path after the light source of the projector. [0025] In summary, the present invention is in accordance with the patent of the invention patent, and the patent mentioned in the law is only the continuation of the 翻 翻 佳 佳 佳 佳 φ φ φ φ φ 发明 发明 发明 发明 发明 发明 发明This application. However, equivalent modifications or variations made by those skilled in the art to the spirit of the present invention are intended to be included in the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a first preferred embodiment of a projector according to the present invention; [0027] FIG. 2 is a schematic view showing a light passing through a liquid crystal panel in the projector of FIG. 1; 3 is a viewing angle characteristic diagram of the liquid crystal panel in FIG. 1; [0029] FIG. 4 is a schematic view showing a second preferred embodiment of the projector of the present invention. [Main component symbol description] [0030] (Invention) [0031] Projector: 100, 200 [0032] Light source: 110 096135476 Form number A0101 Page 8 of 14 0993460885-0 1339310 [0033] [0034] [0036] [0039] [0039] December 27, 099 revised replacement page
[0040] [0041] [0042] [0043] [0044] [0045] [0046] [0047] [0048] 色輪：120 光源透鏡組：130 積分枉：1 32 光學鏡片：134 反射鏡片：136 全内反射棱鏡：138 微鏡片裝置：140 成像透鏡組：150 對比度調節裝置：160 液晶面板.16 2 驅動裝置：164 環境亮度檢測裝置：210 投影亮度檢測裝置：220 亮度比較電路：230 對比度調節裝置控制電路：240 螢幕：260 096135476 表單編號A0101 第9頁/共14頁 0993460885-0[0048] [0048] [0048] [0048] Color wheel: 120 light source lens group: 130 integral 枉: 1 32 optical lens: 134 reflective lens: 136 full Internal reflection prism: 138 Microlens device: 140 Imaging lens group: 150 Contrast adjustment device: 160 LCD panel. 16 2 Drive unit: 164 Ambient brightness detection device: 210 Projection brightness detection device: 220 Brightness comparison circuit: 230 Contrast adjustment device control Circuit: 240 Screen: 260 096135476 Form No. A0101 Page 9 / Total 14 Page 0993460885-0