201222133 發光層30 功能層30a 螢幕基材4 觀察者5 可見光消減層6 五、本案若有化學式時， (無） 請揭示最翻特_化學式 六、發明說明： 【發明所屬之技術領域】 ，本發明係有關一種雷射投影系統之投影暮，尤户一接 當投影幕貼覆在一螢幕基材如透明破璃上 ^ Ϊ = 3影fi之另一侧設置一可見光消Μ用Si 【先前技術】 目前在雷射投影系統方面已有很多先前技術，如 US6,986,58卜 US7,090,355、US7，182,467、US7,213,923、 φ US7,452,082等係揭示當作投影幕之薄膜（film)的相關技 術；如 US6,843,568 以及其引證案（References cited)及 其他公開資料（other publication)等係揭示雷射掃描顯示 裝置（laser scanning display)的相關技術；如 US6,329,966 係揭示紫外線光束在薄膜上磷光點（UV beam on phosphorus dots on film)的相關技術；如 US4,213，153 係 揭示調變紫外線雷射在磷光材以形成影像（modulated UV laser on phosphorus material to form image)的相關技術； 如US6,900,916係揭示掃描紫外光線在螢光薄膜上形成影 像(scanned UV light to generate images on fluoresce film)201222133 Light-emitting layer 30 Functional layer 30a Screen substrate 4 Observer 5 Visible light reduction layer 6 V. If there is a chemical formula in this case, (None) Please reveal the most special _Chemical formula 6. Invention: [Technical field of invention] The invention relates to a projection of a laser projection system, and the U.S. is connected to a screen substrate, such as a transparent glass, on the other side of the screen. Technology] At present, there are many prior art in laser projection systems, such as US 6,986,58, US 7,090,355, US 7,182,467, US 7,213,923, φ US 7,452,082, etc., which are disclosed as film of projection screen. Related technologies; such as US 6,843,568 and its References cited and other publications, etc., disclose techniques related to laser scanning displays; for example, US 6,329,966 discloses that the ultraviolet light beam is A technique related to UV beam on phosphor dots on film; for example, US 4,213,153 discloses the modulation of ultraviolet lasers in phosphors to form images (modulated UV laser). A related art of on phosphorus material to form image; as disclosed in US 6,900,916, which discloses scanning ultraviolet light to generate images on fluoresce film.
l SI 2/14 201222133 的相關技術。 然而’上述習知之雷射投影系統技術在使用上仍存在 一些問題’如若是利用散射原理以形成影像，則該顯像營 幕（投影幕）為不透明，因此限制了該成像技術在需要透 明投影幕之應用；而透明投影幕之應用如抬頭顯示器 (Head-Up-Display，簡稱HUD)，主要是使觀察者既可看 到透明投影幕上之投射晝面且同時又可看到透明投影幕後 方之物體，如車用抬頭顯示器、儀表板（dashboard)、櫥窗 廣告（Ads· Window)等，其係將透明投影幕設在一透明狀 瑩幕基材如透明玻璃上使用，如將透明投影幕設在車輛駕 驶座前之透明擋風玻璃上，再使雷射投影器所產生之激發 光（雷射光）投射至該透明狀投影幕上以產生所欲之影像 晝面’如各種車體訊號（如車速等）或其他相連結設定之 通訊資料（如來電顯示等），供駕駛者（觀察者）在抬頭 _( Head-Up)狀態（不用低頭）即可觀察；由於車用抬頭顯 示器’即投影幕設在該駕駛座前透明的擋風玻璃上，常是 使用在自然光的環境下如白天開車時使用，則投影幕上所 顯示之影像晝面容易受到外界（車外）自然光之干擾，致 容易發生影像晝面辦認度不足的問題，即外界（車外）之 • 可見光容易穿透透明狀螢幕基材（擋風玻璃）及投影幕， 致直接影響並降低影像畫面的對比度，相對降低觀察者所 觀察對於影像畫面顯示之辨識度，相對影響雷射投影系統 應用於抬頭顯示器（HUD)之使用效率及應用範圍。本發 明即針對上述先前技術之投影幕的缺點而加以有效解決: 藉以增進雷射投影系統之使用功放及應用領域。 【發明内容】 本發明主要目的係提供一種雷射投影系統之投影幕， 該雷射投影系統係利用一雷射投影器其根據單一畫面或動 態晝面之影像訊號以產生激發光（雷射光）並再投射至— 3/14 201222133l Related technologies of SI 2/14 201222133. However, the above-mentioned conventional laser projection system technology still has some problems in use. If the scattering principle is used to form an image, the image display screen (projection screen) is opaque, thus limiting the imaging technology to require transparent projection. The application of the screen; and the application of the transparent projection screen, such as Head-Up-Display (HUD), is mainly to enable the observer to see both the projection surface on the transparent projection screen and the transparent projection screen. The object of the square, such as a car head-up display, a dashboard, an advertisement (Ads·Window), etc., is to use a transparent projection screen on a transparent curtain substrate such as transparent glass, such as transparent projection The curtain is placed on the transparent windshield in front of the driver's seat of the vehicle, and then the excitation light (laser light) generated by the laser projector is projected onto the transparent projection screen to generate the desired image surface. Signals (such as speed, etc.) or other connected communication information (such as caller ID, etc.) for the driver (observer) to look at in the head-up state (without bowing) Because the vehicle head-up display, that is, the projection screen is located on the transparent windshield in front of the driver's seat, often used in natural light environment, such as driving during the day, the image surface displayed on the projection screen is susceptible to The interference of natural light from the outside (outside the car) is prone to the problem of insufficient recognition of the image surface, that is, the outside (outside the vehicle) • visible light easily penetrates the transparent screen substrate (windshield) and the projection screen, which directly affects Reducing the contrast of the image frame and relatively reducing the visibility of the image display by the observer, relatively affecting the efficiency and application range of the laser projection system applied to the head-up display (HUD). The present invention effectively solves the shortcomings of the above-described prior art projection screens: thereby enhancing the use of power amplifiers and applications in laser projection systems. SUMMARY OF THE INVENTION The main object of the present invention is to provide a projection screen of a laser projection system, which uses a laser projector to generate excitation light (laser light) according to a single picture or a dynamic image signal. And then cast to - 3/14 201222133
相配合之透明狀投影幕上以產生影像晝面供觀察者觀察， 其中該投影幕係包含至少一發光層其具備至少一種發光物 質其為受到某一波長範圍之激發光照射即可被激發產生另 一波長範圍之被激發光之物質；其中該投影幕係貼覆在一 螢幕基材如透明玻璃之一侧（如内側）上使用；其特徵在 於：該投影幕在相對於觀察者之另一侧，設置一可見光消 減層，該可見光消減層為一光致色變色膜（photochromatic film) ’或為一具備可增加可見光之散射或反射之結構膜， 或為一可吸收部分或全部可見光之結構膜，藉以能消減穿 透至觀察者一側之可見光，使該投影幕可在自然光的環境 下以幾近透明的效果呈現高辨認度之投影晝面，以使觀察 ^^斤觀察之影像畫面具有較高的對比度，藉以提昇雷射投 影系統使用效率及應用範圍。 本發明再一目的係提供一種雷射投影系統之投影幕， 其中該可見光消減層係設在該投影幕與螢幕基材（透明玻 之間’或該可見光消減層與該投影幕分別對應設在該 f幕基材（透明玻璃）之兩侧，藉以使觀察者所觀察之影 像晝面具有較高的對比度。 本發明另一目的係提供一種雷射投影系統之投影幕， 乂中該投影幕上進一步可設定至少二不同的特定區域供可 &別顯示二不同顏色之影像畫面，但該二不同顏色之影像 面可為同一波長之雷射光所激發，藉以進一步增加觀察 詞·於影像晝面顯示之辨識度。 [S] 其本發明另一目的係提供一種雷射投影系統之投影幕， ^中該投影幕之發光層上進一步設置一聚光層並介於投影 ^發光層）與觀測者之間，該聚光層可為一微稜鏡陣列 1 —微透鏡陣列，供用以改變該投影幕之發光層之光發散 ^以使光發散角經過該聚光層之後能有效地集中而縮小 “發散角’以使投影幕（發光層）之發光能量能較集中於 4/14 201222133 觀測者方向，藉以達到提高亮度之效果。 【實施方式】 $考圖1，其係本發明所應用之雷射投影系統之一實 施例示意圖，其中該雷射投影系統1係用以說明但非用以 巧制本發明之投影幕。該雷射投影系統i包含一雷射投影 器2及一透明狀投影幕3，該雷射投影器2係根據單一晝 面或動態晝面之影像訊號（SD以產生激發光（雷射光） 並再投射至該相配合之透明狀投影幕3上以產生影像晝面 供觀察者觀察。該雷射投影器2可設計包含但不限制：一 φ 雷射光源模組2〇1、一雷射訊號調變模組202、一合光模組 203、一旋轉平面鏡模組204、一旋轉平面鏡控制模組2〇5 及一訊號轉換組206、一雷射訊號調變模組2〇7及一合光 模組208 ;由於本發明主要是針對一雷射投影系統丨中之 投影幕3加以設計，因此有關該雷射投影器2及其如何根 據單一晝面或動態晝面之影像訊號以產生激發光（雷射光） 並才又射至投影幕3上以產生影像晝面4的技術，在此不另 作詳細說明。 參考圖2 ’其係本發明雷射投影系統之投影幕一實施 φ 例示意圖。該投影幕3係形成一薄膜，該薄膜之基材可以 為熱固性樹脂或是熱塑性樹脂’如環氧樹脂、盼媒樹脂、 二聚氰氣樹脂、PVA、PP、PET) PMMA、PVC、PE 等； 該投影幕3係包含至少一發光層30，該發光層30係具備 至少一種發光物質其為受到某一波長範圍之激發光照射即 可被激發產生另一波長範圍之被激發光之物質；又該發光 層30進一步可與一層或一層以上之其他各種功能層3〇a， 如被激發光吸收層、激發光吸收層、被激發光與散射光吸 收層、散射層、激發光反射層、被激發光部分反射層、被 激發光與被散射光部分反射層、聚光層、部分遮光層等， 加以配合以組成一投影幕3，因此在圖2中以該發光層30 [ $] 5/14 " 201222133 僅佔據投影幕3之厚度之一部分來表示該投影幕3之本體 結構但不限制，其餘部分即用以代表一層或一層以上之其 他各種功能層3〇a但不限制。 該投影幕3係貼覆在一螢幕基材4之一側（如内侧） 上使用，該螢幕基材4在此係為一透明玻璃，如一般車輛 之駕駛座前之透明擋風玻璃；本發明之主要特徵在於：該Cooperating with a transparent projection screen to create an image pupil for viewing by an observer, wherein the projection screen comprises at least one luminescent layer having at least one luminescent substance that can be excited by being irradiated by excitation light of a certain wavelength range a substance of another wavelength range of excited light; wherein the projection screen is applied to a side of a screen substrate such as a transparent glass (eg, the inner side); wherein the projection screen is opposite to the observer On one side, a visible light abatement layer is provided, which is a photochromatic film 'or a structural film having a scattering or reflection that increases visible light, or an absorbable part or all of visible light. The structural film can reduce the visible light that penetrates to the observer side, so that the projection screen can present a high-resolution projection surface in a natural light environment with a nearly transparent effect, so as to observe the image of the observation The screen has a high contrast ratio to improve the efficiency and application range of the laser projection system. A further object of the present invention is to provide a projection screen of a laser projection system, wherein the visible light reduction layer is disposed between the projection screen and the screen substrate (transparent glass) or the visible light reduction layer and the projection screen are respectively disposed corresponding to The two sides of the f-screen substrate (clear glass) are used to make the image of the image viewed by the observer have a high contrast. Another object of the present invention is to provide a projection screen of a laser projection system, in which the projection screen Further, at least two different specific areas can be set for the image display of two different colors, but the image faces of the two different colors can be excited by the laser light of the same wavelength, thereby further increasing the observation word and the image. [S] Another object of the present invention is to provide a projection screen of a laser projection system, in which a light collecting layer is further disposed on the light emitting layer of the projection screen and is disposed between the projection and the light emitting layer. Between the observers, the concentrating layer may be a micro 稜鏡 array 1 - a microlens array, for changing the light divergence of the luminescent layer of the projection screen to pass the light divergence angle through the concentrating layer After that, the "divergence angle" can be effectively concentrated and reduced so that the illuminating energy of the projection screen (light-emitting layer) can be concentrated in the direction of the observer of 4/14 201222133, thereby achieving the effect of improving the brightness. [Embodiment] It is a schematic diagram of an embodiment of a laser projection system to which the present invention is applied, wherein the laser projection system 1 is used to illustrate but not to elaborate the projection screen of the present invention. The laser projection system i includes a laser a projector 2 and a transparent projection screen 3, the laser projector 2 is based on a single pupil or dynamic pupil image signal (SD to generate excitation light (laser light) and then projected to the matching transparent projection The image is created on the screen 3 for the observer to observe. The laser projector 2 can be designed to include but not limited to: a φ laser light source module 2〇1, a laser signal modulation module 202, and a combined light The module 203, a rotating plane mirror module 204, a rotating plane mirror control module 2〇5 and a signal conversion group 206, a laser signal modulation module 2〇7 and a light combining module 208; Is for a laser projection system The screen 3 is designed so that the laser projector 2 and how it generates an excitation light (laser light) according to a single or dynamic image to generate an excitation light (laser light) and then onto the projection screen 3 to produce an image surface The technique of 4 is not described in detail herein. Referring to Fig. 2, a schematic view of a projection screen of a laser projection system of the present invention is shown. The projection screen 3 forms a film, and the substrate of the film can be thermosetting. a resin or a thermoplastic resin such as an epoxy resin, a dielectric resin, a dimeric cyanide resin, PVA, PP, PET, PMMA, PVC, PE, etc.; the projection screen 3 includes at least one luminescent layer 30, the luminescent layer 30 Having at least one luminescent substance which is excited by excitation light of a certain wavelength range to be excited to generate excited light of another wavelength range; and the luminescent layer 30 may further be combined with one or more layers of other functional layers 3〇a, such as an excited light absorbing layer, an excitation light absorbing layer, an excited light and a scattered light absorbing layer, a scattering layer, an excitation light reflecting layer, an excited light partially reflecting layer, an excited light and a scattered light portion a reflective layer, a concentrating layer, a partial opaque layer, etc., are combined to form a projection screen 3, so that in FIG. 2, the luminescent layer 30 [$] 5/14 " 201222133 occupies only a part of the thickness of the projection screen 3 The body structure of the projection screen 3 is shown but not limited, and the rest is used to represent one or more layers of other functional layers 3〇a, but is not limited. The projection screen 3 is applied to one side of the screen substrate 4 (such as the inner side), and the screen substrate 4 is here a transparent glass, such as a transparent windshield in front of the driver's seat of a general vehicle; The main feature of the invention is that
投影幕3在相對於觀察者5之另一侧上，設置一可見光消 減層6 ’該可見光消減層6主要是用以能消減穿透至觀察 者5 —侧之可見光；當該投影幕3應用於車用抬頭顯示器 時’即投影幕3設在該駕駛座前透明的擋風玻璃上，則^ 可見光係指由外側（車外）穿透透明擋風玻璃而進入内^ (車内）之任何可見光，如白天開車時環境之自然光。 該可見光消減層6主要是用以能消減穿透至觀察者5 一側之可見光’因此該可見光消減層6可設計為一光致 變色膜（photochromaticfilm)，即該光致變色膜可為紫^ 光（UV)感應變色或為可見光感應變色；或設計為〜^卜 可增加可見光之散射或反射之結構之膜；或設計為〜備 收部分或全部可見光之結構之膜；由於該可見光消滅吸 能有效消減由外側（車外）穿透透明擋風玻璃而至進 6 察者一侧之可見光’因此使該投影幕3可在自然光的戸， 下以幾近透明的效果呈現高辨認度之投影晝面，以使 者5所觀察之影像晝面具有較高的對比度，藉以提昇察 投影系統1之使用效率及應用範圍。 射 其中該可見光消減層6可利用一商用光致色變色膜 成，該商用光致色變色膜為一種光致色變色膜，會因' 冓 光（UV光）照射在薄膜上時顏色變深，即紫外光感應變外 膜’或因可見光照射在薄膜上時顏色變深，即可見光色 變色膜’而當沒有紫外光（UV光）或可見光照射在薄3腺應 時又會變回原色，藉此可增強在強光下投影幕3上办、上 6/14 ^衫像_ 201222133 5對足、之彌補且更可增加投影幕3上影像顯像之亮The projection screen 3 is disposed on the other side of the viewer 5 with a visible light reducing layer 6'. The visible light reducing layer 6 is mainly used to reduce the visible light that penetrates to the side of the observer 5; when the projection screen 3 is applied When the vehicle is used for the head-up display, that is, the projection screen 3 is placed on the transparent windshield in front of the driver's seat, then the visible light refers to any visible light that enters the inside (inside the vehicle) from the outside (outside the vehicle) through the transparent windshield. Such as the natural light of the environment when driving during the day. The visible light reducing layer 6 is mainly used to reduce the visible light that penetrates to the side of the observer 5. Therefore, the visible light reducing layer 6 can be designed as a photochromatic film, that is, the photochromic film can be purple ^ Light (UV)-induced discoloration or inductive discoloration of visible light; or a film designed to increase the scattering or reflection of visible light; or a film designed to receive some or all of the visible light; due to the visible light elimination It can effectively reduce the visible light from the outside (outside the vehicle) through the transparent windshield to the side of the viewer's side. Therefore, the projection screen 3 can present a high-resolution projection with almost transparent effect under the natural light. In the facet, the image plane viewed by the occupant 5 has a high contrast ratio, thereby improving the use efficiency and application range of the projection system 1. The visible light-reducing layer 6 can be formed by using a commercial photochromic film which is a photochromic film which becomes darker when irradiated on the film by "light" (UV light). , that is, the ultraviolet light-sensing outer film 'or the color becomes dark when the visible light is irradiated on the film, that is, the visible light color-changing film', and when there is no ultraviolet light (UV light) or visible light, the light color is changed to the primary color when it is applied to the thin 3 gland. In this way, it can enhance the projection of the projection screen 3 under the strong light, the upper 6/14 ^ shirt image _ 201222133 5 pairs of feet, and can also increase the brightness of the image on the projection screen 3
述之i冰“進一步可利用一紫外光光源（圖未示），以使前 译卜光感應變色膜可因紫外光光源之照射以控制其變 二二’而該紫外光光源可設置於該雷射投影系統上或設 j 模組上，也就是利用一紫外光光源，並使其所發 制对^外光能照射於該紫外光感應變色膜上’藉以主動控 制該紫^卜光感應變色膜之變色程度。又進一步可利用一光 源偵測器（圖未示）以偵測來自於該投影幕3之發光層30 即相對於觀察者5之另一側上）的背景光，供可依 ^景，強度之不同來控制該紫外光光源之強度，以控制該 束外光感應變色膜之變色程度，其中該光源偵測器可設置 於該雷射投影系統上或設置於外加模組上。 时又該可見光消減層6可利用一商用深色膜構成’該商 用深色膜為一種帶有深色、黑色、深灰色等可在強光下增 加對比效果的薄膜，該薄膜材料可為熱固性樹脂或是熱塑 性樹脂，如環氧樹脂、酚醛樹脂、三聚氰氨樹脂、PVA、 PP、PET、PMMA、PVC、PE...等樹脂。 該可見光消減層6可先製作一自製光致變色層再塗佈 於投影幕3之發光層30上而構成，即利用光致變色粉料 (photochromatic pigment)先行製備成塗料（ink)，然後 塗佈於投影幕3之發光層30而形成一薄膜，其中該塗料 (ink)之組成包含光致變色粉料（photochromatic pigment)、溶劑（solvent)及樹脂（resin)，其中該光致變 色粉料為商品料，製備成塗料（ink)之尺寸（pore size) 為100〜500nm之間，或比100nm更小；該溶劑為一般化學 溶劑，沸點在90〜230°C之間，類別為醇類酮類、醛類、醚 類、醋酸酯類、醇醚類；該溶劑也可以為水；該樹脂（resin) 為熱固性樹脂或是熱塑性樹脂，如環氧樹脂、酚醛樹脂、 三聚氰氨樹脂、PVA、PVP、PVC、醇酸樹脂、ps、polyester、 L S -i 7/14 201222133 polyurethane、thermoplastic polyurethane 或壓克力等。而 形成投影幕3之薄膜之基材（substrate)可以為熱固性樹脂 或是熱塑性樹脂，如環氧樹脂、酚醛樹脂、三聚氰氨樹脂、 PVA、PP、PET、PMMA、PVC、PE等。以下所述乃本發 明之可見光消減層6 —實施例之組成及其製程：先製作一 光致變色層塗料（ink)，再塗佈於投影幕3之發光層30上 而構成，其中該塗料（ink)之組成包含：光致變色粉體為 5〜50wt% (重量百分濃度）、化學助劑為〇. 〇5〜10wt%、樹脂 為80〜3(^1:%、溶劑為14.95〜1{^1;%，攪拌均勻後再塗佈於 投影幕3之薄膜材料上，再進行烘乾作業以將溶劑完全去 • 除，而形成一光致色變色膜，即本發明之可見光消減層6 ; 而藉由該光致色變色膜與投影幕結合，在UV光或是可見光 環境下，可增加投影幕之對比效果。 再藉以下各應用實施例，進一步說明本發明之應用方 法及其所能達成之作用功效： <實施例1> 參考圖2，其係本發明雷射投影系統之投影幕之使用 狀態一實施例示意圖。本實施例中該可見光消減層6係設 置介於螢幕基材（透明玻璃）4與投影幕3 (或發光層30) 之間，藉以使觀察者5所觀察之影像晝面具有較高的對比 度。 <實施例2> 參考圖3 ’其係本發明雷射投影系統之投影幕之使用 狀態另一實施例示意圖。本實施例中該可見光消減層6係 設置於螢幕基材4上相對應於投影幕3 (或發光層30)之 另一侧上’即該可見光消減層6與該投影幕3分別對應設 在該螢幕基材（透明玻璃）4之外、内兩侧，藉以使觀察 者5所觀察之影像晝面具有較高的對比度。 8/14 201222133 * <實施例3> ▲參考圖4二其係本發明雷射投影系統之投影幕之使用 狀態一實施例不意圖。本實施例中該可見光消減層6係設 置介於螢幕基材（透明玻璃）4與投影幕3 (或發光層3〇) 之間，而且其中該投影幕3 (或發光層3〇)上進一步設定 至少二不同的特定區域，如包含上、下二雙色顯示層3〇b、 30c，供可分別顯示二不同顏色之影像畫面，如本實施例以 網印套版方式將該投影幕3 (或發光層30)製備成上、下 •^雙色顯示層’如使上層為綠色或藍色顯示層3〇b以作為 影像顯示；而使下層為紅色顯示層3〇c以作為警告色之影 響像顯示如超速警示、來電顯示、車門未關警示等。但為方 便集作，該'一不同的特定區域，如包含上、下二雙色顯示 層30b、30c，之影像晝面可為同一波長之雷射光所激發。 <實施例4> 參考圖5 ’其係本發明雷射投影系統之投影幕之使用 狀態另一實施例示意圖。本實施例中該可見光消減層6係 設置於螢幕基材4上相對應於投影幕3 (或發光層3〇)之 另一側上，即該可見光消減層6與該投影幕3分別對應設 φ 在該螢幕基材（透明破璃）4之外、内兩侧，而且其中該 才又影幕3 (或發光層30)上進一步設定至少二不同的特定 區域’如包含上、下二雙色顯示層30b、30c，供可分別顯 示二不同顏色之影像晝面，如本實施例以網印套版方式將 該投影幕3 (或發光層30)製備成上、下二雙色顯示層， 如使上層為綠色或藍色顯示層30b以作為影像顯示；而使 下層為紅色顯示層30c以作為警告色之影像顯示如超速警 示、來電顯示、車門未關警示等。但為方便製作，該二不 =的特定區域’如包含上、下二雙色顯示層3〇b、3〇c，之 影像晝面可為同一波長之雷射光所激發。 [S] 9/14 201222133 參考圖6、7’其分別係本發明雷射投影系統之投影幕 3 (發光層30)與觀測者5之間另設一聚光層7之使用| 態不意圖。為改變該投影幕3之發光層3〇之光 以 使投影幕3 層30)之發光能量能較集中於觀測者$The i-ice "further utilizes an ultraviolet light source (not shown) such that the pre-translated light-sensitive color-changing film can be controlled by the illumination of the ultraviolet light source, and the ultraviolet light source can be disposed at the On the laser projection system or on the j-module, that is, an ultraviolet light source is used, and the emitted light energy is irradiated onto the ultraviolet light-sensitive color-changing film to actively control the purple light-sensitive light sensor. The degree of discoloration of the color changing film. Further, a light source detector (not shown) can be used to detect the background light from the light emitting layer 30 of the projection screen 3, that is, on the other side of the viewer 5, for The intensity of the ultraviolet light source can be controlled according to the brightness of the scene and the intensity to control the degree of discoloration of the external light-sensing color-changing film, wherein the light source detector can be disposed on the laser projection system or disposed on the external mold. When the visible light reduction layer 6 can be formed by using a commercial dark film, the commercial dark film is a film with dark, black, dark gray, etc., which can increase the contrast effect under strong light. Can be a thermosetting resin or Plastic resin, such as epoxy resin, phenolic resin, melamine resin, PVA, PP, PET, PMMA, PVC, PE, etc. The visible light reduction layer 6 can be first made into a self-made photochromic layer and then coated. Formed on the luminescent layer 30 of the projection screen 3, that is, an ink is prepared by using a photochromatic pigment, and then applied to the luminescent layer 30 of the projection screen 3 to form a film. The composition of the ink comprises a photochromatic pigment, a solvent, and a resin, wherein the photochromic powder is a commercial material and is prepared as an ink size (pore size). It is between 100~500nm, or smaller than 100nm; the solvent is a general chemical solvent with a boiling point of 90~230°C, and the categories are alcohol ketones, aldehydes, ethers, acetates, alcohol ethers. The solvent may also be water; the resin is a thermosetting resin or a thermoplastic resin such as epoxy resin, phenolic resin, melamine resin, PVA, PVP, PVC, alkyd resin, ps, polyester, LS -i 7/14 201222133 polyurethane, thermopla Stic polyurethane or acrylic, etc. The substrate forming the film of projection screen 3 can be a thermosetting resin or a thermoplastic resin such as epoxy resin, phenolic resin, melamine resin, PVA, PP, PET, PMMA, PVC, PE, etc. The following is the composition of the visible light-reducing layer 6 of the present invention and its process: first, a photochromic layer coating (ink) is formed, and then applied to the light-emitting layer 30 of the projection screen 3. The composition of the ink composition comprises: the photochromic powder is 5 to 50 wt% (weight percent concentration), the chemical auxiliary agent is 〇. 5 to 10 wt%, and the resin is 80 to 3 (^). 1:%, the solvent is 14.95~1{^1;%, after being evenly mixed, it is coated on the film material of the projection screen 3, and then drying is performed to completely remove the solvent to form a photochromic color. The film, that is, the visible light abatement layer 6 of the present invention; and by combining the photochromic color film with the projection screen, the contrast effect of the projection screen can be increased in the UV light or visible light environment. Further, the application method of the present invention and the functions and effects thereof can be further explained by the following application examples: <Embodiment 1> Referring to FIG. 2, the use state of the projection screen of the laser projection system of the present invention is implemented. Illustration of the example. In this embodiment, the visible light reducing layer 6 is disposed between the screen substrate (clear glass) 4 and the projection screen 3 (or the light-emitting layer 30), so that the image surface observed by the observer 5 has a high contrast ratio. . <Embodiment 2> Referring to Fig. 3, there is shown a schematic view of another embodiment of the use state of the projection screen of the laser projection system of the present invention. In this embodiment, the visible light reduction layer 6 is disposed on the screen substrate 4 corresponding to the other side of the projection screen 3 (or the light-emitting layer 30), that is, the visible light-reducing layer 6 and the projection screen 3 are respectively disposed correspondingly. The outer and inner sides of the screen substrate (clear glass) 4 are such that the image plane viewed by the observer 5 has a high contrast. 8/14 201222133 * <Embodiment 3> ▲ Referring to Fig. 4, the use of the projection screen of the laser projection system of the present invention is not intended. In this embodiment, the visible light reducing layer 6 is disposed between the screen substrate (clear glass) 4 and the projection screen 3 (or the light-emitting layer 3), and wherein the projection screen 3 (or the light-emitting layer 3) further Setting at least two different specific areas, for example, including upper and lower two-color display layers 3〇b, 30c, for respectively displaying image images of two different colors, as in this embodiment, the projection screen 3 is screen-printed. Or the luminescent layer 30) is prepared as an upper and lower • two-color display layer 'such that the upper layer is a green or blue display layer 3 〇 b for image display; and the lower layer is a red display layer 3 〇 c for warning color Such as display such as speed warning, caller ID, door not closed warning, etc. However, in order to facilitate the collection, the image plane of the same wavelength, such as the upper and lower two-color display layers 30b, 30c, can be excited by the same wavelength of laser light. <Embodiment 4> Referring to Fig. 5, there is shown a schematic view of another embodiment of the use state of the projection screen of the laser projection system of the present invention. In this embodiment, the visible light reducing layer 6 is disposed on the other side of the screen substrate 4 corresponding to the projection screen 3 (or the light-emitting layer 3), that is, the visible light-reducing layer 6 and the projection screen 3 are respectively correspondingly disposed. φ is on the inner and outer sides of the screen substrate (transparent glass) 4, and further, at least two different specific areas are set on the screen 3 (or the luminescent layer 30), such as containing the upper and lower two colors. The display layer 30b, 30c is configured to display two different color image planes respectively. In this embodiment, the projection screen 3 (or the light-emitting layer 30) is prepared as a top and bottom two-color display layer in a screen printing manner, such as The upper layer is the green or blue display layer 30b for image display, and the lower layer is the red display layer 30c for displaying the image as a warning color such as an overspeed warning, an incoming call display, a door not closed warning, and the like. However, for the convenience of fabrication, the specific area of the two non-=, including the upper and lower two-color display layers 3〇b, 3〇c, may be excited by the same wavelength of laser light. [S] 9/14 201222133 Referring to Figures 6, 7', respectively, the use of a concentrating layer 7 between the projection screen 3 (light-emitting layer 30) of the laser projection system of the present invention and the observer 5 is not intended. . In order to change the light of the illuminating layer 3 of the projection screen 3, the illuminating energy of the projection screen 3 layer 30) can be concentrated on the observer $
方向以達到提高亮度之效果，本發明進一步可於投景彡幕3 (發光層30)上並介於投影幕3 (發光層3〇)與觀&者5 之間設置一聚光層7，該聚光層7之結構並不限制，可為 =微稜鏡陣列7a如圖6所示或一微透鏡陣列几如圖7所 示，則原來之光發散角如圖6、7中二點線人之間所示角 度，在没置該聚光層7之後能有效地集中而縮小光發散角 如圖6、7中二點線B之間所示角度，藉以達到提高亮度之 效果。 g以上所示僅為本發明之優選實施例，對本發明而言僅 是說明性的，而非限制性的。在本領域具通常智識者理解， 在本發明專利要求所限定的精神和範圍内可對其進行許多 改變，修改，甚至等效變更，但都將落入本發明的保護範 圍内。 【圖式簡單說明】 圖1係本發明所應用之雷射投影系統之一實施例示意圖。 圖2係本發明雷射投影系統之投影幕之使用狀態一實施例 示意圖（實施例1)示意圖。 圖3係本發明雷射投影系統之投影幕之使用狀態一實施例 示意圖（實施例2)示意圖。 圖4係本發明雷射投影系統之投影幕之使用狀態一實施例 示意圖（實施例3)示意圖。 圖5係本發明雷射投影系統之投影幕之使用狀態一實施例 示意圖（實施例4)示意圖。 圖6係本發明雷射投影系統之投影幕（發光層）與觀測者 之間另設一聚光層（微稜鏡陣列）之使用狀態示意圖。 201222133 圖7分別係本發明雷射投影系統之投影幕（發光層）與觀 測者之間另設一聚光層（微透鏡陣列）之使用狀態示意圖。 【主要元件符號說明】 雷射投影系統1 雷射投影器2 雷射光源模組201 雷射訊號調變模組202 合光模組203 旋轉平面鏡模組204 旋轉平面鏡控制模組205 •訊號轉換組206 雷射訊號調變模組207 合光模組208 投影幕3 發光層30 功能層30a 顯示層30a、30b 螢幕基材4 觀察者5 φ 可見光消減層6 聚光層7 微棱鏡陣列7a 微透鏡陣列7b 11/14In order to achieve the effect of improving the brightness, the present invention can further provide a light collecting layer 7 on the projection screen 3 (light emitting layer 30) and between the projection screen 3 (light emitting layer 3) and the viewer 5 The structure of the concentrating layer 7 is not limited, and may be the 稜鏡 array 7a as shown in FIG. 6 or a microlens array as shown in FIG. 7, and the original light divergence angle is as shown in FIG. The angle shown between the dotted persons can effectively concentrate and reduce the light divergence angle after the light collecting layer 7 is not disposed, as shown in the angle between the two dotted lines B in FIGS. 6 and 7, thereby achieving the effect of improving the brightness. The above is only the preferred embodiment of the invention, and is merely illustrative and not limiting. It will be apparent to those skilled in the art that many changes, modifications, and equivalents may be made in the spirit and scope of the invention as defined by the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an embodiment of a laser projection system to which the present invention is applied. Fig. 2 is a schematic view showing a state of use of a projection screen of a laser projection system of the present invention (Embodiment 1). Fig. 3 is a schematic view showing a state of use of a projection screen of a laser projection system of the present invention (Embodiment 2). Fig. 4 is a schematic view showing a state of use of a projection screen of a laser projection system of the present invention (Embodiment 3). Fig. 5 is a schematic view showing a state of use of a projection screen of a laser projection system of the present invention (Embodiment 4). Fig. 6 is a schematic view showing the state of use of a concentrating layer (micro 稜鏡 array) between the projection screen (light emitting layer) of the laser projection system of the present invention and the observer. 201222133 Fig. 7 is a schematic view showing the use state of a light collecting layer (microlens array) between the projection screen (light emitting layer) of the laser projection system of the present invention and the observer. [Main component symbol description] Laser projection system 1 Laser projector 2 Laser light source module 201 Laser signal modulation module 202 Light combining module 203 Rotating plane mirror module 204 Rotating plane mirror control module 205 • Signal conversion group 206 Laser signal modulation module 207 Light module 208 Projection screen 3 Light-emitting layer 30 Functional layer 30a Display layer 30a, 30b Screen substrate 4 Observer 5 φ Visible light-reducing layer 6 Concentrating layer 7 Micro-prism array 7a Microlens Array 7b 11/14