200409942200409942
本發明係關於一種折射投影器用之發光裝置，尤指一 種適用於各種顯示裝置光源之發光裝置。 【一、先前技術】 目前一般折射投影器皆是利用燈管或燈泡作為發光 源’且分置於所欲投射影像之左右或上下兩側，以提供充 足之光源，之後藉由其光線照射至所欲投射之影像，而將 影像帶至後續之折射或投影元件，進行放大及投影。然而 燈管佔用空間大，且分置於所欲投射影像之左右或上下兩 側時，會有光度不均勻的現象，同時其耗電量也相當大。 而現代之投影顯示器，均傾向於迎合輕薄短小之趨 勢’傳統之燈管作為發光源，有體積難以縮小之缺點。尤 其當體積縮小之後，如何使光線均勻地投射㈣示器（例 如微顯示器），並減少耗電量，提高亮度，為業界亟欲解 決之問題。 發明人爰因於此，本於積極發明之精神，亟思一種可 以=決上述問題之「折射投影器用之發光裝置」，幾經研 咒貫驗終至完成此項嘉惠世人之發明。 【三、發明内容】 本發明之主要目的係在提供一種折射投影器用之發光 裝置，俾能提供-光度均勻、省電且體積小之光源。 裝---------訂---- #'* (請先閲讀背面之注意事項再填寫本頁各欄) ，線！ 200409942 A7 B7 五、發明説明（2 ) 為達成上述之目的’本發明一種折射投影器用之發光 裝置，主要包括：一光源；一反射式導光板，位於該光源 之一側，用以反射並均勻化來自該光源之光；一繞射鏡片 組’位於該反射式導光板反射出光之一側，用以對該反射 式導光板反射之光進行集光及降低光散射；一半穿透式鏡 片’位於該繞射鏡片組相對於該反射式導光板之一侧，用 以反射由該繞射鏡片組所傳來之光線；以及一顯示單元， 位於該半穿透式鏡片反射出光之一側，以接收由該半穿透 式鏡片所傳來之光線並反射之；其中，該繞射鏡片組位於 该反射式導光板與該半穿透式鏡片之間，該顯示單元不位 於該繞射鏡片組與該反射式導光板形成之直線上；且該光 源發射出之光，係經由該反射式導光板反射至該繞射鏡片 組，並牙透该繞射鏡片組，之後經由該半穿透式鏡片反射 至该頭示單元，再經由該顯示單元反射並穿透該半穿透式 鏡片送出。 本發明之發光裝置可應用於任何影像、圖片、符號及 文丰顯示之顯示裝置，如眼鏡型（G〇ggle 或頭盔型 (Head Mount)折射投影裝置、液晶電視、液晶電腦顯示 器、手提電腦顯示器、攜帶型D V D、汽車、火車、飛機 載電視、G p s顯示、博彩遊戲機、便攜電視、兒童學習 機、旱上電腦、遊戲機、〇A工業儀器顯示、可視電話 等。由於本發明確有增進功效，故依法申請發明專利。 【四、實施方式】 ! 2 3本紙張尺度適用中(CNS) A4規格（21〇χ297公董） 6 (請先閱讀背面之注意事項再填寫本頁各欄) 裝 -----訂--------·線 200409942 A7 -------— B7 五、發明説明（3 ) ' --~— 〃本發明折射投影器用之發光裝置之光源發出之光種類 播限制，，可為任何之可見光，較佳為輪流發出紅、綠、藍 一原色光。其發出之光之週期為其發光週期小於人體眼 視覺暫留時間之二合夕—。士 & σ t 、、， 一刀心一本發明折射投影器用之發光裝 置之半穿透式鏡片，其光穿透率較佳為介於40〜90〇/〇。本 。發明折射投影器用之發光裝置之半穿透式鏡片種類無限 制，車乂佳為偏振分光膜（PBS)。本發明折射投影器用之發 f裝置之顯示單元可為習用之顯示器，較佳為微平面顯示 器，更佳為LCD、LTPS LCD，L_c〇s微顯示器或dmd 微顯示器4發明折射投影器用之發光裝置之繞射鏡片組 係用以k同自該反射式導光板發出之光線之半輝度角。本 發明之發光裝置可應用於任何影像、圖片、符號及文字顯 二之”'、示裝置，較佳為眼鏡型（Goggle type)或頭盘型 (Head Mount)折射投影裝置。 為能讓貴審查委員能更瞭解本發明之技術内容，特 舉一較佳具體實施例説明如下。 實施例1 請同時參照第1、2圖本發明發光裝置之剖視圖與立體 圖。本發明之發光裝置1包含一外殼5，内含可輪流發出 紅、綠、藍三原色光之光源丨0，且其發光週期小於人體眼 睛視覺暫留時間之三分之一，以於眼睛視覺暫留期間將形 成影像之各原色光完全送達眼睛，使眼睛看到完整的影 像。反射式導光板2 0位於光源1 〇之一側，用以將來自光 源1 0之光反射至繞射鏡片組3 〇 ’並使光均勻化。繞射鏡 1 紙張尺度適用中國國家標準（CNS) A4規格（210X297公釐) ' " 三厶1 裝---------訂---- ^ Γ V (請先閱讀背面之注意事項再填寫本頁各襴) ，線！ 200409942 A7 __ B7_____ 五、發明説明（4 ) 片組3 0位於反射式導光板2 〇之下侧，包含水平繞射鏡片 31與垂直繞射鏡片32，用以對反射式導光板20反射之光 進行集光，即提高光線之半輝度角，使散射之光線可調整 成為平行光，同時降低光散射。偏振分光膜（PBS)40，位 於繞射鏡片組30之下側，其光反射率為50%，光穿透率為 90%，用以反射由繞射鏡片組3〇傳來之光線，並使L_ C Ο S微顯示器5 0反射之光得以穿透之，以節省發光裝置 之空間。L - C Ο S微顯示器5 0位於偏振分光膜4 0反射出光 之一側，以接收由偏振分光膜4〇所傳來之光線，並將其反 射後再穿透過偏振分光膜40，以將L-COS微顯示器50顯 示之影像送至後續之折射投影器。 光源1 0發射出之光，係經由反射式導光板2 〇反射至 繞射鏡片組3 0，並穿透繞射鏡片組3 〇，之後經由偏振分 光膜4 0反射至L - C Ο S微顯示器5 0，再經由L - C Ο S微顯示 咨5 0反射並帶出l - C Ο S微顯示器5 0上顯示之影像，然後 穿透偏振分光膜40而送出本發明之發光裝置i，以將L_ C Ο S微顯示器5 0上顯示之影像傳送至後續之折射投影 器，進行放大投影。本發明之發光裝置能有效提供顯示器 高均勻度、省電、及佔用空間小之光源，可選擇性地與任 一影像顯示裝置相結合，尤其適合作為眼鏡型或頭盔型顯 示裝置之光源。 實施例2 裝---------訂---- (請先閲讀背^之注意事項再填寫本頁各攔) 線丨 200409942 A7 B7 五、發明説明（5 ) 請參照第3圖。第3圖係本發明眼鏡型折射投影裝置 内部之剖面圖。本實施例包含一 T字型殼體，内含如第j 圖所示之發光裝置1與2，二個三菱鏡240與241(反射單 元）’ 一非等曲率凸透鏡2 5 0與2 5 1 (折射透鏡組），以及二 經部分鏡面處理之凹面鏡260與261(虛像成像單元）。其 中，該二發光裝置1與2係置於該τ字型殼體之中心位置， 該二發光裝置1與2之另一側則分別置有三稜鏡2 4 〇與三棱 鏡2 4 1，使彳于该二發光裝置1與2皆未於該二三稜鏡2 4 〇與 241之間。二稜鏡240與241下方分別置有凸透鏡250與 251，該凸透鏡25 0與25 1下方分別為凹面鏡26〇與261。 其中該凸透鏡25 0與25 1並安排成使由三稜鏡24〇、241 來之入射光與孩凸透鏡2 5 0與2 5 1與該反射單元入射面法 線形成一 30度之夾角γ。 由發光裝置1與2發出之光線，分別向左右兩方進入 至二棱鏡240與241處。之後再反射至凸透鏡25〇與251 處，將原影像轉換形成一倒立放大實像，之後再經過該 凹面鏡260與261，再一次放大，形成一倒立放大虛像。 請參照第4圖，第4圖係本發明眼鏡型折射投影裝置 内部之側視圖。此圖顯示該三棱鏡㈣會將^^⑽微顯示器 50所提供之影像偏折折射至凸透鏡25〇處，是為影像 2 7 1且咸〜像2 7 1會落在該凸透鏡2 5 〇之焦距與兩倍焦 距（間某處，並依據凸鏡成像原理，在該凸透鏡250之另 Γ側的兩倍焦距外會形成-上下倒立，左右方向不變之 放大實像272(若有屏幕置於此則可看到—倒立放大實The present invention relates to a light-emitting device for a refractive projector, and more particularly to a light-emitting device suitable for a light source of various display devices. [I. Prior Technology] At present, general refractive projectors use lamps or light bulbs as the light source, and are placed on the left or right or the upper and lower sides of the image to be projected to provide a sufficient light source, and then the light is irradiated to The image to be projected, and the image will be brought to the subsequent refractive or projection element to be enlarged and projected. However, when the lamp occupies a large space and is placed on the left or right or the upper and lower sides of the image to be projected, there will be uneven brightness and the power consumption will be quite large. However, modern projection monitors tend to cater to the trend of thinness, lightness and shortness. The traditional light tube as a light source has the disadvantage of being difficult to shrink in size. Especially after the volume is reduced, how to make the light evenly project on the display (such as a micro display), and reduce the power consumption and increase the brightness is a problem that the industry is desperate to solve. Because of this, the inventor, based on the spirit of active invention, eagerly thought about a "light-emitting device for refractive projectors" that could solve the above-mentioned problems. After several researches, he went through the trial and error to complete this invention that benefits the world. [III] Summary of the Invention The main object of the present invention is to provide a light emitting device for a refractive projector, which can provide a light source with uniform luminosity, power saving and small size. Install --------- Order ---- # '* (Please read the notes on the back before filling in the columns on this page), line! 200409942 A7 B7 V. Description of the invention (2) In order to achieve the above-mentioned object, a light-emitting device for a refractive projector of the present invention mainly includes: a light source; a reflective light guide plate located on one side of the light source for reflection and uniformity Light from the light source; a diffractive lens group 'located on one side of the light reflected from the reflective light guide plate to collect light from the reflective light guide plate and reduce light scattering; half-transmissive lenses' Located on one side of the diffractive lens group opposite to the reflective light guide plate for reflecting light transmitted by the diffractive lens group; and a display unit on one side of light reflected by the transflective lens, To receive and reflect the light transmitted by the transflective lens; wherein the diffractive lens group is located between the reflective light guide plate and the transflective lens, and the display unit is not located on the diffractive lens And the reflective light guide plate is formed on a straight line; and the light emitted by the light source is reflected to the diffractive lens group through the reflective light guide plate, penetrates the diffractive lens group, and then passes through the diffractive lens group. Transmissive reflective lenses to illustrate the head unit, display unit and then reflected by the transflective and penetrate the lens out. The light-emitting device of the present invention can be applied to any image, picture, symbol and Wenfeng display display device, such as a glasses type (Goggle or head mount) refractive projection device, a liquid crystal television, a liquid crystal computer monitor, a portable computer monitor , Portable DVD, car, train, aircraft-borne TV, G ps display, gaming console, portable TV, children's learning machine, dry computer, game machine, 0A industrial instrument display, video phone, etc. Since the present invention does have Improve the efficacy, so apply for an invention patent in accordance with the law. [Four, implementation]! 2 3 paper size applicable (CNS) A4 specifications (21〇297297) 6 (Please read the precautions on the back before filling in the columns on this page ) Installation ----- Order -------- · Line 200409942 A7 -------- B7 V. Description of the invention (3) '-~-发光 The light-emitting device for the refractive projector of the present invention The type of light emitted by the light source is limited, and can be any visible light, preferably red, green, and blue primary colors in turn. The period of the emitted light is such that the period of its light emission is less than the duration of the human eye vision retention time. Xi—shi & σt ,,,, and one-sharp-hearted, a transflective lens of a light-emitting device for a refracting projector of the present invention, preferably having a light transmittance of 40 to 90/0. This is a light-emitting device for a refracting projector of the present invention. The type of the semi-transmissive lens is unlimited, and the car is preferably a polarization beam splitting film (PBS). The display unit of the f-device used in the refractive projector of the present invention may be a conventional display, preferably a micro-planar display, more preferably an LCD, LTPS LCD, L_c0s micro-display or dmd micro-display 4 The diffractive lens set of the light-emitting device used for the refractive projector of the invention is used to make k the half-brightness angle of the light emitted from the reflective light guide plate. The light-emitting device of the present invention can Applies to any image, picture, symbol and text display "", display device, preferably a Goggle type or Head Mount refraction projection device. In order to allow your review committee to better understand this The technical content of the invention is described below with reference to a preferred embodiment. Embodiment 1 Please refer to FIGS. 1 and 2 at the same time, a cross-sectional view and a perspective view of the light-emitting device of the present invention. The light-emitting device 1 of the present invention includes a housing 5, The light source of three primary colors of red, green, and blue can be alternately emitted, and its light emission period is less than one third of the visual retention time of the human eye, so that the primary color light that forms an image is completely delivered to the eyes during the visual retention period of the eye, Make the eyes see the complete image. The reflective light guide plate 20 is located on one side of the light source 10, and is used to reflect the light from the light source 10 to the diffractive lens group 3 0 'and make the light uniform. The diffractive mirror 1 Paper size applies Chinese National Standard (CNS) A4 specification (210X297mm) '" Three packs 1 pack --------- order ---- ^ Γ V (Please read the notes on the back before filling Each page on this page), line! 200409942 A7 __ B7_____ V. Description of the invention (4) The sheet group 3 0 is located below the reflective light guide plate 2 〇, and includes a horizontal diffractive lens 31 and a vertical diffractive lens 32 for reflecting light reflected from the reflective light guide plate 20 Collecting light, that is, increasing the half-brightness angle of the light, so that the scattered light can be adjusted into parallel light, while reducing light scattering. A polarizing beam splitting film (PBS) 40 is located below the diffractive lens group 30, and has a light reflectance of 50% and a light transmittance of 90%, and is used to reflect the light transmitted by the diffractive lens group 30, and The light reflected by the L_C0S microdisplay 50 can be transmitted to save the space of the light-emitting device. The L-C Ο micro display 50 is located on one side of the polarizing beam splitting film 40 to reflect the light, so as to receive the light transmitted by the polarizing beam splitting film 40, reflect it, and then pass through the polarizing beam splitting film 40, so that The image displayed by the L-COS microdisplay 50 is sent to a subsequent refractive projector. The light emitted from the light source 10 is reflected to the diffractive lens group 30 through the reflective light guide plate 20, and penetrates the diffractive lens group 3 0, and then is reflected to the L-C Ο micro through the polarization beam splitting film 40. The display 50 is reflected by the L-C0S micro display 50, and the image displayed on the l-C0S microdisplay 50 is taken out, and then transmitted through the polarizing beam splitting film 40 to send out the light-emitting device i of the present invention. The image displayed on the L_C0S microdisplay 50 is transmitted to a subsequent refractive projector for enlarged projection. The light-emitting device of the present invention can effectively provide a light source with high uniformity, power saving, and small space for display. It can be selectively combined with any image display device, and is particularly suitable as a light source for glasses-type or helmet-type display devices. Example 2 Installation --------- Order ---- (Please read the precautions on the back ^ before filling in the blocks on this page) Line 丨 200409942 A7 B7 V. Description of the invention (5) Please refer to Section 3 Illustration. Fig. 3 is a sectional view of the inside of a spectacle-type refractive projection apparatus according to the present invention. This embodiment includes a T-shaped housing, which contains the light-emitting devices 1 and 2 as shown in the j-th figure, two Mitsubishi mirrors 240 and 241 (reflection unit) 'a non-equal curvature convex lens 2 5 0 and 2 5 1 (Refractive lens group), and two concave mirrors 260 and 261 (virtual image imaging unit) which are partially mirror-finished. Wherein, the two light-emitting devices 1 and 2 are placed at the center of the τ-shaped housing, and the other sides of the two light-emitting devices 1 and 2 are respectively provided with three 稜鏡 2 4 〇 and three prisms 2 4 1, so that Neither the two light-emitting devices 1 and 2 are between the two-three-dimensional devices 2 4 0 and 241. Convex lenses 250 and 251 are respectively disposed below the two lenses 240 and 241. Convex lenses 250 and 261 are concave lenses 26 and 261, respectively. Wherein, the convex lenses 25 0 and 25 1 are arranged so that the incident light from the lenses 340 and 241 and the convex lenses 2 50 and 25 1 form a 30-degree angle γ with the normal of the incident surface of the reflection unit. The light emitted from the light emitting devices 1 and 2 enters the two prisms 240 and 241 to the left and right, respectively. It then reflects to the convex lenses 25 and 251, transforms the original image into an inverted magnified real image, and then passes through the concave mirrors 260 and 261 to magnify again to form an inverted magnified virtual image. Please refer to FIG. 4, which is a side view of the interior of the glasses-type refractive projection apparatus of the present invention. This figure shows that the prism will refract the image provided by the ^^ micro display 50 to the convex lens 25 °, which is the image 2 71 and the image 2 71 will fall on the focal length of the convex lens 2 5 0. And twice the focal length (somewhere, and according to the principle of convex lens imaging, outside the double focal length of the other Γ side of the convex lens 250 will form-upside down, the magnified real image of the same left and right direction 272 (if a screen is placed here) Then you can see-
ί2諫·尺度適财_家鮮—— ---L (請先閲讀背面之注意事項再填寫本頁各攔) 裝 -----訂------ 200409942 A7 ---------— B7__________ 五、發明説明（6 ) 一 -- 像），該實像272之放大倍率取決於影像271與凸透鏡25〇 之距離距離愈近則放大倍率愈高。而該實像2 7 2須落於 該凹面鏡260之焦距内，同樣的，依據成像原理，在'二面 鏡260之另一側會形成一放大虛像273，且該虛像273之 放大倍率亦取決於該實像272與該凹面鏡26〇之間的距 離。値得注意的是，在本實施例中凸透鏡25〇與凹面鏡 260之間沒有屏幕，無法看到由凸透鏡25〇形成之放大實 像，因此，我們看到的現象是光線經由凸透鏡2 5 〇匯聚偏 折至凹面鏡260，之後於凹面鏡26〇偏折投射至觀測者眼 中，但該光線無法於眼球上聚焦成實像，所以眼睛會延 伸孩光線至凹面鏡2 60鏡後，形成一與實像272方向相同 之放大虚像273 ◦ 熟習此技術領域者可認知到，為了達成上述的成像 設計，孩三稜鏡240、凸透鏡25 0與凹面鏡260三者須成 一特足之相對位置，使得影像271可落於該凸透鏡25〇之 焦距與兩倍焦距之間，且實像272可落於該凹面鏡26〇之 焦距内。 實施例3 本實施例構造大致如同實施例2所述，惟不同之處在 於該虛像成像單元由凹面鏡26〇置換為平面鏡。如此，所 形成之影像只經過凸透鏡2 5 〇 —次折射與放大作用，之後 再經由平面鏡轉換成虛像，平面鏡不具有放大作用。但本 i 27本紙狀度適财@ 規格（210X297公釐） 10 裝---------訂--- -1 (請先閲讀背面之注意事項再填寫本頁各欄) ·線· 200409942 五、發明説明（7 ) 貫施例構造影像放大之倍率及作用，仍可由折射光線之凸 透鏡250所完成。 實施例4 本實施例構造大致如同實施例2所述，惟不同之處在 於該虛像成像單元由凹面鏡26〇置換為具4〇%反射率之凹 透鏡；其成像原理與放大倍率皆如同實施例2所述。但置 換成凹透鏡之後，觀測者在觀測影像時可同時看見外界環 境。而因為本發明之裝置係以折射投影形成虛$，當採用 凹透鏡作為虛像成像單元，該透射該凹透鏡之光線，因為 折射偏折角度較大，所以對於站在使用者前，且視線約略 等高於眼鏡型顯示器之人，不會看到使用者正在使用或接 收（影像及資料，其保密及隱私性佳，且不會干擾周遭其 他人。 八 實施例5 本實施例構造大致如同實施例2所述，惟不同之處在 於該虛像成像單元係由—面鏡與凹透鏡組合而成；其成像 原理與放大倍率皆如同實施例2所述。該面鏡可上下抽 換，因此可依觀測者需要決定是否只觀測影像，或是相同 時看見外界環境。 飞疋心Π 實施例6 11 線· m本紙狀度適财關家 五、發明説明（8 ) 本實施例構造大致如同實 、 於該虛像成像單元係由、、罢 所以’惟不同之處在 ㈣像早兀係由—遮罩與凹透鏡组合而成； 原理與放大倍率皆如同余 此 μ施例2所述。該遮罩可上下柚 換’因此可依觀測者需要決 時看見外界環境。 疋疋否只硯測影像，或是想同 實施例7 於、，例構造大致如同實施例4所述，惟不同之處在 虛，單元外部加裝-半固態液晶廣遮罩350以及 :光:兄片3 60 ’其成像原理與放大倍率皆如同實施例2 所迷。惟該半固態液晶層遮罩於通電時變為透明，使外界 之光線通過，使用者可以於接收顯示器影像之同時接受影 像及監看周遭環境。當使用者關閉液晶層遮罩之電源，遮 罩復k除外界《光線，而為不受外界干擾進行資訊或影像 之接收，所以可以通電與否決定其為透料不透光狀態， 作為^光柵使用。因此可依觀測者f要決定是否只觀測影 像’或是想同時看見外界環境。 實施例8 請參見第5圖。本實施例構造大致如同實施例2所述， 惟不同之處在於該發光裝置i、2與三棱鏡24〇、241之間 刀別置有一視焦距壓縮组2 8 〇 ;其成像原理與放大倍率皆 如同實施例2所述。視焦距壓縮組28〇可產生景深加大之 效果，使影像更為清晰。 200409942 A7 B7 五、發明説明（9 ) 例 9 請參見第6、7圖。本實施例構造大致如同實施例2所 述’惟不同之處在於僅使用一發光裝置1，並利用凸透鏡 220與22 1及三棱鏡23 0與23 1來將光線折射或反射至三棱 鏡240與241處；其成像原理與放大倍率皆如同實施例2所 述。 實施例1 0 請參見第8圖。本實施例構造大致如同實施例$所述， 惟不同之處在於僅使用一發光裝置1，並利用凸透鏡2 2 〇 與221及三稜鏡23 0與23 1來將光線折射或反射至三稜鏡 2 4 0與2 4 1處；其成像原理與放大倍率皆如同實施例2所 述。 茜注思的疋’上述僅為貫施例’而非限制於實施例。 譬如此不脱離本發明基本架構者，皆應為本專利所主張 之權利範圍，而應以專利申請範圍為準。 【五、圖式簡單説明】 第1圖係本發明發光裝置之剖視圖。 第2圖係本發明發光裝置之立體圖。 第3圖係本發明之一實施例眼鏡型折射投影裝置内部之立 體圖。 I rrll.l^---------訂---- (請先閲If,?背面之注意事項再填寫本頁各攔) ·線 200409942 A7 ---- -B7 ___ 五、發明説明（l〇 ) 第4圖係本發明之一實施例眼鏡型折射投影裝置内部之側 視圖與虛像成像原理。 第5圖係本發明之另一實施例眼鏡型折射投影裝置内部之 立體圖。 第6圖係本發明之又一實施例眼鏡型折射投影裝置内部之 立體圖。 第7圖係第6圖本發明之又一實施例眼鏡型折射投影裝置内 部之上視圖。 第8圖係本發明之再一實施例眼鏡型折射投影裝置内部之 立體 圖。 【六 、圖號説明】 1，2 發光裝置 5 外殼 10 光源 20 反射式導光板 30 繞射鏡片組 31 水平繞射鏡片 32 垂直繞射鏡片 40 偏振分光膜〇PBS) 50 L-COS微顯示器 220 凸透鏡 221 凸透鏡 230 三棱鏡 231 三稜鏡 240 三棱鏡 241 三棱鏡 250 凸透鏡 25 1 凸透鏡 260 凹面鏡 261 凹面鏡 271 影像 272 實像 273 虛像 280 視焦距壓縮組 350 半固態液晶遮罩 360 偏光鏡片 i本紙張尺度適用中國國家標準（CNS) Α4規格（210X297公釐） 14 裝i (請先閲讀背面之注意事項再填寫本頁各欄) 訂------ n βκι » 線丨ί2 谏 · Suitable Finance _Home Fresh—— --- L (Please read the precautions on the back before filling in the blocks on this page) Packing ------ Order ------ 200409942 A7 ----- ----— B7__________ V. Description of the invention (6)-Image), the magnification of the real image 272 depends on the closer the distance between the image 271 and the convex lens 25 °, the higher the magnification. The real image 2 7 2 must fall within the focal length of the concave mirror 260. Similarly, according to the imaging principle, an enlarged virtual image 273 will be formed on the other side of the 'two-sided mirror 260, and the magnification of the virtual image 273 also depends on The distance between the real image 272 and the concave mirror 260. It should be noted that in this embodiment, there is no screen between the convex lens 25o and the concave mirror 260, and the magnified real image formed by the convex lens 25o cannot be seen. Therefore, the phenomenon we see is that the light converges through the convex lens 250. Fold to the concave mirror 260, and then project it into the observer's eye at the concave mirror 26. However, the light cannot be focused on the eyeball into a real image. Therefore, the eye will extend the light to the concave mirror 2 60, and form a direction same as the real image 272. Enlarged virtual image 273 ◦ Those familiar with this technical field will recognize that in order to achieve the above-mentioned imaging design, the three children 240, the convex lens 250 and the concave mirror 260 must be in a specific relative position so that the image 271 can fall on the convex lens. The focal length of 25 ° is between twice the focal length, and the real image 272 can fall within the focal length of the concave mirror 26 °. Embodiment 3 The structure of this embodiment is substantially the same as that described in Embodiment 2, except that the virtual image imaging unit is replaced with a concave mirror 26o by a flat mirror. In this way, the formed image only undergoes the refraction and magnification by the convex lens 250 °, and is then converted into a virtual image by a plane mirror. The plane mirror has no magnification effect. But i 27 this paper is suitable for paper @ Specifications (210X297mm) 10 Pack --------- Order --- -1 (Please read the notes on the back before filling in the columns on this page) · Line · 200409942 V. Description of the invention (7) The magnification and function of image magnification constructed by the embodiment can still be performed by the convex lens 250 that refracts light. Embodiment 4 The structure of this embodiment is substantially the same as that described in Embodiment 2. The only difference is that the virtual image imaging unit is replaced by a concave mirror 26o with a concave lens with 40% reflectance; the imaging principle and magnification are the same as in Embodiment 2. As described. However, after changing to a concave lens, the observer can see the external environment at the same time when observing the image. However, because the device of the present invention forms a virtual lens by refractive projection, when a concave lens is used as the virtual image imaging unit, the light transmitted through the concave lens has a large deflection angle, so it is about the same height as standing in front of the user. The person on the glasses-type display will not see that the user is using or receiving (images and data, which has good confidentiality and privacy, and will not disturb other people around. Eighth embodiment 5 The structure of this embodiment is roughly the same as that of embodiment 2. The only difference is that the virtual image imaging unit is a combination of a mirror and a concave lens; the imaging principle and magnification are as described in Embodiment 2. The mirror can be swapped up and down, so it can be changed according to the observer It is necessary to decide whether to observe only the image, or to see the external environment at the same time. Fei Fei Xin Π Example 6 11 Lines · m Paper-like Degrees Suitable for Financial Affairs 5. Description of the Invention (8) The structure of this embodiment is roughly as it is. The virtual image imaging unit is composed of, and so on, but the difference is that the early image is composed of a mask and a concave lens; the principle and magnification are the same as the above. As described in Example 2. The mask can be changed up and down, so you can see the external environment depending on the observer's needs. 疋 疋 Whether you only speculate on the image, or want to use the same as in Example 7, the structure of the example is roughly the same as in Example 4. The only difference is that the semi-solid-state liquid crystal wide mask 350 and the: light: brother 3 60 'are used outside the unit. The imaging principle and magnification are the same as in Example 2. However, the semi-solid liquid crystal The layer mask becomes transparent when it is energized, allowing the external light to pass through. The user can receive the image and monitor the surrounding environment while receiving the monitor image. When the user turns off the power of the LCD layer mask, the mask is outside the boundary. "Light, in order to receive information or images without being disturbed by the outside world, so you can determine whether it is transparent or opaque using electricity or not. It can be used as a grating. Therefore, you can decide whether to observe only the image according to the observer f 'or I want to see the outside environment at the same time. Embodiment 8 Please refer to FIG. 5. The structure of this embodiment is substantially the same as that described in Embodiment 2, except that the light-emitting devices i, 2 and the prisms 24o, 241 are placed separately. There is Apparent focal length compression group 280; its imaging principle and magnification are as described in Example 2. Apparent focal length compression group 280 can produce the effect of increasing the depth of field and make the image clearer. 200409942 A7 B7 V. Description of the invention ( 9) Example 9 Please refer to FIGS. 6 and 7. The structure of this embodiment is roughly the same as that described in the embodiment 2. The only difference is that only one light-emitting device 1 is used, and convex lenses 220 and 22 1 and triangular prisms 23 0 and 23 1 are used. Refraction or reflection of light to the prisms 240 and 241; the imaging principle and magnification are as described in the embodiment 2. Example 10 Please refer to FIG. 8. The structure of this embodiment is substantially as described in the embodiment $, but The difference is that only one light-emitting device 1 is used, and the convex lenses 2 2 0 and 221 and the 3 稜鏡 23 0 and 23 1 are used to refract or reflect light to the 3 稜鏡 2 0 0 and 2 4 1; its imaging principle And magnification are as described in the second embodiment. Qian's commentary "The above is only an embodiment" and is not limited to the embodiment. For example, those who do not depart from the basic structure of the present invention should be the scope of rights claimed by the patent, and the scope of the patent application shall prevail. [V. Brief Description of the Drawings] FIG. 1 is a cross-sectional view of the light-emitting device of the present invention. Fig. 2 is a perspective view of a light emitting device of the present invention. Fig. 3 is a perspective view of the inside of a glasses-type refractive projection apparatus according to an embodiment of the present invention. I rrll.l ^ --------- Order ---- (Please read the notes on the back of If,?, And then fill in the blocks on this page) · Line 200409942 A7 ---- -B7 ___ V. DESCRIPTION OF THE INVENTION (10) FIG. 4 is a side view and a virtual image imaging principle inside the glasses-type refractive projection apparatus according to an embodiment of the present invention. Fig. 5 is a perspective view of the inside of a glasses-type refractive projection apparatus according to another embodiment of the present invention. Fig. 6 is a perspective view of the inside of a glasses-type refractive projection apparatus according to another embodiment of the present invention. FIG. 7 is a top view of the inside of a glasses-type refractive projection apparatus according to still another embodiment of the present invention. Fig. 8 is a perspective view of the inside of a glasses-type refractive projection apparatus according to still another embodiment of the present invention. [六 、 Illustration of drawing number] 1,2 Illumination device 5 Housing 10 Light source 20 Reflective light guide plate 30 Diffraction lens group 31 Horizontal diffraction lens 32 Vertical diffraction lens 40 Polarizing beam splitting film PBS) 50 L-COS micro display 220 Convex lens 221 Convex lens 230 Convex lens 231 Convex lens 240 Convex lens 241 Convex lens 250 Convex lens 25 1 Convex lens 260 Convex lens 261 Convex lens 271 Image 272 Real image 273 Virtual image 280 Focal length compression group 350 Semi-solid liquid crystal mask 360 Polarized lens i This paper size applies to Chinese national standards (CNS) Α4 Specification (210X297mm) 14 Pack i (Please read the notes on the back before filling in the columns on this page) Order ------ n βκι »Line 丨