1238919 九、發明說明： 【發明所屬之技術領域】 斗寸別係關於一種能提高 ，以及其中的濾光片之 本务明係關於一種投影系統， 對比度的投影系統之光學引擎設計 鍍膜方式。 【先前技術】 近年來投影顯示農置已廣泛應用於各種場合，不 用於公眾場合撥放簡報或影片，亦已深人家庭，成為新_ 代的視聽娛樂設備主流。現今投影顯示裝置之發 發展體積小、重量輕，而且可提供良好亮度、對比度與ί 像放大之而品質投影機。尤其是可攜式投影機，由於攜帶 方便，可隨時隨地使用’相當受到消費者青睞，此外，由 於&平面_不ι置中’大幅地節省投影機之重量與體積， 因此若能搭配-良好之光學引擎，便可得到良好之放大影 像品質。 、 另方面，一般投影系統所使用之光源通常為高壓汞 燈⑽ρι_，而此汞燈的特性在綠光的光譜相較於紅 光、藍光都強，導致混成白光偏綠。&了讓投影系統所顯 ^ (M^ro-cHsplay) 電壓對透光率曲線（V-T Curve)的特性，調整其電壓，使 ，光的穿透率降低。以此方法來控制綠光的能量比例，使 付光學二原色，紅（R)、綠（G)、藍（B)的能量能匹配， 以得到所要的色’皿’此法稱之為白平衡調整 '然而一般電 1控制有其範圍，右為了達成白平衡之效果而降低綠光的 1238919 此^頁不灰階影像時將使電壓的可調整範圍縮小，故 2 f使光湘率降低，損耗光源之光度並使耗電度增 ::到相同效果的白場，除了可從電壓上 的方法，有-種4::=堆τ'上達到白平衡 1定用延遲堆S (retarder stack)枯 :片：:用某個波長的波段做9 ==以得到所要的波長，進而遽掉不需要的波段， 在於，、:：圖中綠光強度已被衰減。此方法的缺點乃 困難，所以其成本二力，的貼合技術在製程上相當 ； 曰曰加，因此雖然能改善電壓對透光率 本，J J對比問?，但卻因此而提高整體投影系統的成 “思光片在實際商業的應用上還有一段距離。 _有鑑於上述方法之缺點以及市場需求，發明人便積極 研發一種新的提高投影牵移斜 、 =先子㈣兀件，降低綠光的能量比重，而得到較白的白 %目雨的鑛膜技術可依需求生產出令不同波段的光穿透 之a先片⑹ter) ’如第2圖所示，其中mb及第& 圖分別表示藍色濾以（Lwpass)、綠色滤光片細 pass及紅色濾光片（L〇ngpass)之穿透光譜，顯示該三種 濾f片分別可讓紅、綠、藍三種顏色的光穿透並反射其他 波段的光。本發明之製作原理係利用兩層不同 膜產生出我們所需的穿透㈣，第_㈣ 光片即由第3a與第3b圖所合，。利用此等鑛膜濾光片之製 1238919 作出-人二：ΐ的牙透光譜與反射光譜相反的特性’欲製 ^出付“彔光減弱之需求㈣光片是可行的。 犋的方式相較於吶敕日s -叩币广 ί光子、'又 較好二2 ::的方法有較高的對比度及 較簡易且：=低 延遲堆叠片的製作，則其製程 【發明内容】 比产：ΓΓΓ目的係在於提供一種能提高投影系統對 所於屮用一種雙面鍍膜之特殊濾光片，降低光源 光強度，再搭配光學引擎設計，能夠有 回對比度及得到較好的灰階效果。 度之=成目本發明提供一種提高投影系統對比 、:， 彡包含：-光源，用以提供光能量；一陣列 位於該光源之一側，用以均勻化該光能量；一第 鏡組之—側，用以匯聚該光源 2,先此置與增加亮度；一錄膜滤光片，位於該光源盘 ^列透鏡組所連成之直線上，其表面與來自該光源之入 夹角，且為配合該光源之波段而鑛有多層膜，並 在反射日=減反射光的局部波段強度，以提供色彩均勻之 白光^弗二集光透鏡，位於該鍍膜濾光片所反射之反射 光的仃進路，上’用以匯聚並均句化該反射光·一顯示單 :位於，亥第一集光透鏡之另一側，用以分合光處理 二集光透鏡所匯聚之該反射光，並提供影像；以及-投影 鏡組位於该顯不單元之一側，用以偏折並放大該顯示 兀所提供之影像。 干 1238919 I依據本發明之實施態樣，該光源可為一高壓汞燈，該 鍍膜攄光片係利用雙面㈣的方式疊合出可降低綠光強度 之反射光U膜濾光片之表面與光源之人射光軸所呈之 夾角’丨於G度至度之間，II膜過程係以高折射率與低折 射率之兩種光學材料利用真空蒸錢的方式相互堆疊而成； ㈣到所要求的波形平坦度，該賴濾以之雙面鑛膜在 一面為19層而另一面為29層時有最佳效果。 為讓本發明之上述目的、特徵和優點能更明顯易懂， :文特舉-較佳實施例，配合所附圖式，作較詳細之說 明0 【貫施方式】 4圖’第4圖係依據本發明之投影顯示裝置 :广貫施例示意圖。此裝置包含：一高塵汞燈ιι〇、一 1、紅外線慮光片（UV_IR Filter)12〇、—陣列透鏡組 IdU 、一偏光轉換哭】％ 、♦丄u °° 135 弟一集光透鏡140、一鍍膜 濾光片150 、一第-隹伞、泰拉… 1RQ 透鏡161、一偏光片162、一延 中 々/'、 7〇及一投影鏡組180。其 龍 外線濾、光片12G、陣列透鏡組130、偏光 轉換器135與第一隼夹读并1/ln a / — m ^ 11〇 . _ 4b /、、兄 係依序排列於該高壓汞燈 之 侧’ I外—紅外岭、、盧亦y 1 %〆 110盘陵ΜΑ 卜、、泉濾先片120係設置於高壓汞燈 Η〇與陣列透鏡組130之間，而陣 换哭ης目，丨入μ a r 干〜迈鏡組130與偏光轉 換:135射於向壓汞燈no與第一集光透鏡140之間。 鍍膜濾光片150係設置於該第一隹 々…※弟木先透鏡140之另一側， 亚位於高壓汞燈110與第一隹 为 m 弟了先透鏡140所連成之光的行 1238919 進路線中，顯示單元170位於此錢膜濾 但不在高壓汞燈110與第—集光透鏡 上，其内包含有-反射式分合* 連成的直、、泉 示面板；在鍍膜濾光片15〇 _ ^ απ _至夕$ —之液晶顯 置有-第二集光透賴二;=:170之間則依序設 屏光片162及一延灌摊 ;=:而顯示單元170的光線輪出側則設置有-投影：組 由先源馬壓汞燈110所發出之光線經由紫外— 濾光片⑽而過濾、其紫外線與紅外線，再經由透= 130、偏光轉換器135肖第—集光透鏡H0而均勻化並聚 焦和增加亮度，然後以一角度為α之入射角投射至鑛㈣ 先片150之表面由鍍膜濾光片15〇衰減其反 綠 光強度後（下文將詳述），再反射至顯示單元⑽，㈠ 依序經由第二集光透鏡161、偏光片162及延遲堆疊片 163而增加亮度並極化光線。該反射光在顯示單元^中 歷經分合光㈣’將自料成紅、綠、藍錢再合成並形 成影像’最後藉由投影鏡組18〇將影像偏折並放大，使該 反射光形成一虛像而投射至屏幕（未繪示）。 〆 間’於此最佳實施例，α等於45度。 為能達成降低綠光強度的目的，該鍍膜濾光片15〇係 以真空瘵鍍的方式，在Β270之玻璃材質上雙面鍍膜而成。 第5a與第5b圖為鍍膜時所參考的反射光譜之示意圖，當濾 來自高壓汞燈110的光線與鍍膜濾光片15〇表面之法 線方向⑹的夾角（亦即入射角）α係介於〇度到9〇度之 1238919 光片之兩個表面分別鑛上符合該光譜之鍍膜時，經由鍍膜 濾光片150所反射的反射光即能符合綠光被衰減的特性， 如第5c圖的反射光譜所示。鍍獏過程係以高折射率之二氧 化鈦（Ti〇2 )與低折射率之二氧化矽（Si〇2 )兩種光學材 料相互堆疊而成，選用此兩種材料的原因是因為此兩種材 料對可見光波段的吸收最小，相對的效能亦較高。又，若 光學材料之堆疊層數太少，反射波段會較不平坦，且反射 率會不足，而若堆疊層數太多，雖可得到較平坦之反射 光，但反射率會變高而不符合需求，於此最佳實施例，當 鍍膜濾光片150之表面鍍膜層數在其一面為19層而另一面 為29層時，可達到綠光衰減2〇%之最佳狀態。 請參考表1 ，所示為利用調整電壓方式與利用光學鍍 膜方式之對比度的比較。如表i所示，若初始狀態之對比 值為職11 ’利用電壓調整方式降低亮場之綠光強度後， 因電塵調整不改變暗場強度’其對比值為麵：11，而利用 光學鑛膜方式因可同時改變亮場及暗場的綠光強度，故其 對比值為1咖：10，所以，相對於利用電壓調整綠光強度的 方式，光學鍍膜可得到較高的對比及較好的灰階效果。 一與由^述可知，本發明利用一特殊的鍍膜濾光片，搭配 光^引擎設計，將來自光源的光線過濾出符合白場需求的 波段後&射至顯不單元，因此而提高顯像的對比度，其 製程較f單且成本較低，無論就目的、手段及功效而言？ 在在均顯示本發明迥異於f知技術之特徵。 雖然本發明已以較佳實施例揭露如上，然其並非用以 1238919 者，在不脫離本發明之精神 與潤飾，因此本發明之保護 所界定者為準。 限定本發明，任何熟習此技藝 和範圍内，當可作些許之更動 範圍當視後附之申請專利範圍 【圖式簡單說明】 第1圖、習知延遲堆疊濾光片之穿透光譜。 第2a圖、藍色濾光片之穿透光譜。 第2b圖、綠色濾光片之穿透光譜。 第2c圖、紅色濾光片之穿透光譜。1238919 IX. Description of the invention: [Technical field to which the invention belongs] The bucket is related to a type of optical engine design of a projection system and a projection system that can improve the optical filter and the coating method. [Previous technology] In recent years, the projection display has been widely used in various occasions, not for public presentations or films, and it has become popular in the new generation of audiovisual entertainment equipment. The development of today's projection display devices is small and lightweight, and it can provide high-quality projectors with good brightness, contrast, and image magnification. In particular, portable projectors, because they are easy to carry, can be used anytime and anywhere 'very popular with consumers, in addition, because & flat_not placed in the' greatly saves the weight and volume of the projector, so if you can match- Good optical engine can get good magnified image quality. On the other hand, the light source used in general projection systems is usually a high-pressure mercury lamp 而 ρι_, and the characteristics of this mercury lamp in the green light spectrum are stronger than those of red and blue light, resulting in mixed white light and greenish. & Let the characteristics of the voltage (V ^ T Curve) of the ^ (M ^ ro-cHsplay) voltage displayed by the projection system be adjusted, so as to reduce the light transmittance. In this way, the energy ratio of green light is controlled so that the energy of the two primary colors, red (R), green (G), and blue (B), can be matched to obtain the desired color 'dish'. This method is called white 'Balance adjustment' However, the general electric 1 control has its range. Right to reduce the green light to achieve the white balance effect. , To lose the luminosity of the light source and increase the power consumption :: to the white field with the same effect, in addition to the method from the voltage, there are-a kind of 4 :: = stack τ 'to achieve a white balance 1 delay stack S (retarder (stack): Dried :: Use a wavelength band of 9 == to get the desired wavelength, and then eliminate the unnecessary band, because the green light intensity in the ::: graph has been attenuated. The shortcomings of this method are difficult, so its cost is two, and the bonding technology is equivalent in the manufacturing process; it can be added, so although it can improve the voltage versus light transmittance, JJ contrasts, but it improves the overall projection system. Cheng ’s "Siguang film" has some distance in practical commercial applications. _In view of the shortcomings of the above method and market demand, the inventor actively developed a new method to improve the projection draft angle The energy proportion of green light, and the whiter white ore-mining technology can produce a first piece of film that allows light in different bands to pass through according to demand) 'as shown in Figure 2, where mb and the & The figures show the transmission spectrum of the blue filter (Lwpass), the green filter fine pass, and the red filter (Longpass), respectively, showing that the three filters f, red, green, and blue Light penetrates and reflects light in other wavebands. The production principle of the present invention is to use two different films to produce the transmission 所需 we need. The _㈣th light sheet is combined by Figures 3a and 3b. Use this And other mineral film filters made 1238919-person two: The characteristic of the permeation spectrum and the reflection spectrum of ΐ is the opposite of that of the ’. The method of 敕 is higher in contrast and simpler than the method of 叩 叩-广 叩 广 ί photon, the 'better 2 2: ::' method, and the == low-latency stack is made. Content] Specific production: ΓΓΓ The purpose is to provide a special filter that can improve the projection system's use of a double-sided coating to reduce the light intensity of the light source. When combined with the design of the optical engine, it can have contrast and get better Grayscale effect. The degree of the invention is to improve the contrast of the projection system. The invention includes:-a light source for providing light energy; an array on one side of the light source for homogenizing the light energy; -Side for converging the light source 2, which is first set and increased brightness; a film filter is located on a straight line formed by the lens group of the light source panel, the surface of the light source and the angle from the light source, And in order to match the wavelength band of the light source, there is a multi-layer film, and on the reflection day = local wave intensity of the anti-reflection light, in order to provide white light with uniform color, and the second focusing lens is located in the reflected light reflected by the coating filter.仃 仃 路 ， 上 'is used to converge and homogenize the reflected light · A display sheet: located on the other side of the first light collection lens, used to split and process the light reflected by the two light collection lenses And provide an image; and-the projection mirror set is located on one side of the display unit to deflect and enlarge the image provided by the display unit. Gan 1238919 I According to the embodiment of the present invention, the light source may be a high-pressure mercury lamp, and the coated phosphor film is laminated on the surface of the reflection light U film filter which can reduce the intensity of green light by means of double-sided phosphor. The angle between the light axis of the light source and the person's light axis is between G degrees and degrees. The II film process is a stack of two optical materials, high refractive index and low refractive index, stacked on top of each other by vacuum steaming; The required flatness of the waveform has the best effect when the double-sided mineral film has 19 layers on one side and 29 layers on the other side. In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, the following is an example of a special embodiment of the present invention, which is described in detail in conjunction with the accompanying drawings. It is a projection display device according to the present invention: a schematic view of the Guang Guan embodiment. This device includes: a high-dust mercury lamp ι〇, １, infrared light filter (UV_IR Filter) 12〇,-array lens group IdU, a polarized light conversion cry]%, ♦ 丄 u °° 135 140, a coated filter 150, a first-parallel umbrella, Terra ... 1RQ lens 161, a polarizer 162, an extension lens / 70, 70, and a projection lens group 180. The external filter, 12G light array, array lens group 130, polarizing converter 135 and the first frame are read and 1 / ln a / — m ^ 11〇. _ 4b /, and the siblings are sequentially arranged on the high-pressure mercury The side of the lamp 'outside-Infrared Ridge, Lu Yi 1%, 110 Panling ΜΑ Bu, spring filter 120 is set between the high-pressure mercury lamp Η〇 and the array lens group 130, and the array is changed. At present, μ ar stem ~ step lens group 130 and polarized light conversion: 135 is shot between the mercury pressure lamp no and the first light collecting lens 140. The coating filter 150 is disposed on the other side of the first lens 140. The other side of the first lens 140 is a submerged high-pressure mercury lamp 110 and the first lens is a line of light formed by the first lens 140 1238919. In the route, the display unit 170 is located on this money film filter but is not on the high-pressure mercury lamp 110 and the first light-collecting lens. The display unit 170 includes a -reflection type coupling and combination of straight, spring display panels; Film 15〇_ ^ απ _ 至 夕 $ — the liquid crystal display is provided-the second set of light through the second; =: 170, the screen light film 162 and a delayed irrigation booth are set in order; =: and the display unit 170 The exit side of the light wheel is provided with a projection: the light emitted by the first source horsepower mercury lamp 110 is filtered through the UV-filter ⑽, its ultraviolet and infrared, and then transmitted through 130 = 135 The first-collecting lens H0 homogenizes and focuses and increases the brightness, and then projects it to the mine at an angle of incidence of α. The surface of the first film 150 is attenuated by the coated filter 15 and its anti-green light intensity is reduced (hereinafter will be (Detailed), and then reflected to the display unit ⑽, 经由 sequentially passes through the second light collecting lens 161, the polarizer 162, and the delay stack Plate 163 and polarized light increases luminance. The reflected light undergoes splitting and combining light in the display unit ^ 'synthesizes red, green, and blue money from itself and forms an image' Finally, the image is deflected and enlarged by the projection lens group 180, so that the reflected light forms A virtual image is projected onto the screen (not shown). In this preferred embodiment, α is equal to 45 degrees. In order to achieve the purpose of reducing the green light intensity, the coating filter 15 is formed by double-side coating on the glass material of B270 by vacuum holing. Figures 5a and 5b are schematic diagrams of the reflection spectrum referenced during coating. When the light from the high-pressure mercury lamp 110 is filtered and the angle (ie, the angle of incidence) of the normal direction ⑹ on the surface of the coating filter 15o is α When the two surfaces of the 1238919 light sheet from 0 degrees to 90 degrees are respectively coated with a coating that conforms to the spectrum, the reflected light reflected through the coated filter 150 can meet the attenuation characteristics of green light, as shown in Figure 5c. The reflection spectrum is shown. The hafnium plating process is based on stacking two optical materials of high refractive index titanium dioxide (Ti〇2) and low refractive index silicon dioxide (Si〇2) on top of each other. The reason for choosing these two materials is because of the two materials The absorption in the visible light band is the smallest, and the relative efficiency is also high. In addition, if the number of stacked layers of the optical material is too small, the reflection wavelength band will be uneven and the reflectance will be insufficient. If the number of stacked layers is too large, although a flat reflection light can be obtained, the reflectance will become high without In accordance with requirements, in this preferred embodiment, when the number of coating layers on the surface of the coating filter 150 is 19 layers on one side and 29 layers on the other side, the optimal state of green light attenuation of 20% can be achieved. Please refer to Table 1 for a comparison of the contrast using the voltage adjustment method and the optical coating method. As shown in Table i, if the initial state comparison value is job 11 'After reducing the green light intensity in the bright field using the voltage adjustment method, the dark field intensity is not changed due to the adjustment of the electric dust', and its comparison value is surface: 11 and the optical The mineral film method can change the green light intensity of the bright field and the dark field at the same time, so its contrast value is 1 coffee: 10, so compared to the method of adjusting the green light intensity by voltage, the optical coating can get higher contrast and Good grayscale effect. As can be seen from the description, the present invention uses a special coating filter and a light engine design to filter the light from the light source into a band that meets the requirements of the white field, and then radiates it to the display unit, thereby improving the display performance. The contrast of the image is relatively simpler and cheaper than f, no matter in terms of purpose, means and efficacy? The present invention shows that the features of the present invention are quite different from those of the prior art. Although the present invention has been disclosed in the preferred embodiment as above, it is not used for 1238919, without departing from the spirit and retouching of the present invention, so what is defined by the protection of the present invention shall prevail. Limiting the present invention, anyone who is familiar with this technique and scope can make some changes. The scope is subject to the attached patent scope. [Simplified illustration of the drawing] Figure 1. The transmission spectrum of the conventional retarded stacked filter. Figure 2a. Transmission spectrum of a blue filter. Figure 2b. Transmission spectrum of a green filter. Figure 2c. Transmission spectrum of a red filter.
第3a圖、製作綠色濾光片所需之穿透光譜之一。 第3b圖、製作綠色濾光片所需之穿透光譜之二。 第4圖、依據本發明之提高投影系統對比度的裝置 第5a®I、製作本發明所彻之鍍膜濾光片的反射光譜之 第5b圖、製作本發明所利用之鑛膜濾、光片的反射光譜之 〇 弟5c圖、本發明所利用之鍍膜濾光片的合成反射光譜。 ^ —凋整電壓與光學鍍膜兩種方式之對比度的比較。 【主要元件符號說明】 110 高壓汞燈 120紫外—紅外線濾光片 130 陣列透鏡組 135 偏光轉換器 140 第一集光透鏡 150 鍍膜濾光片 12 1238919 161 第二集光透鏡 162 偏光片 163 延遲堆疊片 170 顯示單元 180 投影鏡 η 鍍膜濾光片150表面的法線方向 a 入射光在鍍膜遽光片150表面之入射角Figure 3a. One of the transmission spectra needed to make a green filter. Figure 3b. The second transmission spectrum needed to make a green filter. Fig. 4: Device for improving the contrast of a projection system according to the present invention Fig. 5a®I, Fig. 5b of the reflection spectrum of the coating filter made by the present invention, Fig. 5 Figure 5c of the reflection spectrum, the synthetic reflection spectrum of the coating filter used in the present invention. ^ —Comparison of the contrast between the two modes of the burn-in voltage and the optical coating. [Description of main component symbols] 110 High-pressure mercury lamp 120 UV-IR filter 130 Array lens group 135 Polarizing converter 140 First collecting lens 150 Coating filter 12 1238919 161 Second collecting lens 162 Polarizer 163 Delay stacking Sheet 170 Display unit 180 Projection mirror η Normal direction of the surface of the coated filter 150 a Incident angle of incident light on the surface of the coated calender 150
13 1238919 表1 初始狀態 利用電壓方式 利用光學方式 亮場 暗場 亮場 暗場 免場 暗場 Red 200 2 200 2 200 2 Green 800 8 700 8 700 7 Blue 100 1 100 1 100 1 CR 1100/11 1000/11=90.9 1000/10=10013 1238919 Table 1 In the initial state, the voltage method is used, the optical field is used, the bright field is dark, the bright field is dark, and the field is free of dark field. Red 200 2 200 2 200 2 Green 800 8 700 8 700 7 Blue 100 1 100 1 100 1 CR 1100/11 1000 /11=90.9 1000/10 = 100