589467 玖、發明說明： 一、 發明之技術領域： 本發明係有關於使散漫光線達到準直之光束準直板 及背光模組之技術領域，特別是應用於液晶顯示器之背 光模組與相關照明系統之光束準直裝置以及本光束準直 裝置產生之準直型面光源。 二、 先前技術： 液晶顯示器（LCDs)已逐漸取代陰極管作為電腦影像 之顯示器，其主要優點在於輕薄短小，低能源消耗。可 廣泛應用於廣角高對比顯像之需求，譬如醫療及航太科 技。最早之設計並無法滿足此類要求，新近之LCDs設計 可提供一種產生準直光線之背光模組，係光線通過液晶 顯示平板後，籍由擴散平板之散射作用，進一步擴大視 角範圍。 如圖2所示，目前已有多種準直型光源之設計，美 國專利US 6, 327,091 B1所揭示者，其中一透光平板 2上具有複數之透光球體la，於該複數透光球體la與 平板2相切處構成光線可通過之透光區域，該透光區域 以外區域之入射光線將受阻隔，藉此界定一開口率。入 射光線前述透光球體la與平板2相切之透光區域經由 透光球體陣列之繞射作用而達到準直效果。光源利用率 //之定義係為透射光線強度除以入射光線強度。當？/ = 0·079時，開Ο率為0.03，當7? = 〇·35時，開口率 為0· 05。當開u率調整到透射光線強度與準直光線強度 3 愈接近時，光源利用率愈佳。前述設計已達到土 15。之 光來半輻角，比較更早之土25°光束半輻角，有顯著改 善。此外，美國專利us 5, 839,S12之設計，係藉由透 光平板2上之一系列透光錐體lb之繞射作用而達到光束 準直效果。 矣國專利 us 6, 327,091 B1 及 US 5, 839, 812 所能提供之準直光源，光源利用率仍低，再者，美國專 利US’ b，839, 812之結構繁複，生產成本高，不利於產 ⑽化 > 有鑒於此，本發明乃揭示一種利用透光錐體本身 之折射與全反射光束特@，制結構簡易，&高光源使 用率之光朿準直裝置與準直型面光源。 三、發明内容： ,本發明之主要Θ的即在於揭示一種使光線集中於小 角度内，具有高光源利用率之光束準直裝置。 本發明之另一 0的在於揭示一種於光線投射面具有 J反射光線之遮光區域，以增加入射光線強度之準直型 而光源。 t本發明之再一s的在於揭示一種照射區域大，無需 導光板之準直型面光源。 本發明之又一目的在於揭示一種可利用多種不同光 源，諸如白孅燈泡、日光燈管、汞燈、金屬齒化族燈、 冷陰極管與熱陰極管等，同時可滿足各種光源多樣化之 光束擴散角度需求之準直型面光源。 本發明之光束準直裝置，其中包括一透光基板，複 數之透光錐體，以及一屏幕。其中各單一透光錐體係具 有一較面積較小之投射面及一面積較大之射出面，該各 單™透光錐體係以該較小之投射面贴附於前述屏幕，以 該較大之射出面貼附於前述透光基板。於是，在前述葬 幕上與複數透光錐體之投射面之貼合處形成複數之透光 區域。而投射到該屏幕之透光區域以外區域之光線將被 反射回去。投射光線通過屏幕上之複數透光區域進入複 數透光錐體之後，藉由透光錐體周緣表面之全反射以及 投射與射出面折射作用可使光朿達到準直，並且從透光 基板射出集中在小角度範園内之準直型面光源。前述各 透光錐體可具有單一之錐體區段，或者開口角度朝投射 方向逐漸縮小之複數錐體區段。透光錐體之形狀可造成 出射光線集中在小角度内之準直型面光源，進而提高光 源利用率。 以下將配合圖示詳細說明本發明之技術内容。 四、實施方式： 如國3至圖5所示，本發明之光束準直裝置係藉由 光線在折射體内之折射及全反射作用達到光朿準直效 果°圖3揭示光線通過一平頭之透光錐體1〇a之路徑， 該透光錐體l〇a係呈中軸對稱，分別具有一較小之頂面 11a和一較大之底面i2a，以及一開σ角度2α。該透光 錐體10a係由具有折射係數tl之材料所構成。 當光線從前述頂面Ua通過平頭透光錐體l〇a時， 相對於周緣表面13a具有一入射角，根據Snell光學反 589467 射定律，在平頭透光錐體之内產生一折射角。當光線散 射時，其最大折射角為0c，可由以下公式表示： Θc-z sin·'1 (1/n) 如圖3所示，其中α < 0c，光線在平頭透光錐體；L〇a 内沿著最大折射角前進，與錐體之側表面構成一角度 (人：- α，並且分別與中轴以如下角度進行反射： 當 2 α < 時，β = — 2 α，或者 當2α >汐(:時，汐=2 α —心， 最後，光線以0 (:〇:::sin-1 (n sin Θ )之出射角 度從折射體射出。 圖4揭示光線在一折射體中之路徑，該折射體係由 一第一透光錐體區段131a及一第二透光錐體區段131b 構成。前述第一及第二透光錐體區段係為共軸銜接之二 平頭錐體，其中該第一透光錐體區段之底面12b係與該 第二透光錐體區段之頂面11c直接銜接。該第一透光錐 體區段之頂面1 lb構成該折射體之投射面，其面積為H1， 且該第二透光錐體區段之底面12c構成該折射體之射出 面，其面積為H2。該第一及第二透光錐體區段之開口角 分度別為a !及，其f a:t> α2。該具有兩錐體區段之 折射體可壓縮光線出射角度，藉此連到較佳之光線準直 效果。 使用多段共軸之錐體區段，或者多段派線朝中軸方 向彎曲之狐形周緣之錐體區段效果更為顯著，如圖5a至 5d所示，其中lid，lie，Ilf及llg分別表示頂面； 6589467 (1) Description of the invention: 1. Technical field of the invention: The present invention relates to the technical field of a beam collimator and a backlight module that make the diffused light collimated, especially the backlight module and related lighting systems used in liquid crystal displays. Beam collimator and collimated surface light source produced by the beam collimator. 2. Prior Technology: Liquid crystal displays (LCDs) have gradually replaced cathode tubes as monitors for computer images, and their main advantages are thinness, shortness, and low energy consumption. Can be widely used in wide-angle high-contrast imaging needs, such as medical and aerospace technology. The earliest designs could not meet such requirements. The recent LCDs design can provide a backlight module that produces collimated light. After the light passes through the liquid crystal display panel, it diffuses the light by the diffusion plate to further expand the viewing angle range. As shown in FIG. 2, there are currently various designs of collimated light sources, as disclosed in US Pat. No. 6,327,091 B1. One of the light-transmitting plates 2 has a plurality of light-transmitting spheres la, and the plurality of light-transmitting spheres la The tangent to the plate 2 constitutes a light-transmitting area through which light can pass, and incident light in areas outside the light-transmitting area will be blocked, thereby defining an aperture ratio. The light-transmitting area where the light-transmitting spheres la and the plate 2 are tangent to the incident light is collimated by the diffraction effect of the light-transmitting sphere array. Light source utilization // is defined as the transmitted light intensity divided by the incident light intensity. when? When / = 0 · 079, the opening ratio is 0.03, and when 7? = 0.35, the opening ratio is 0.05. When the opening u rate is adjusted to be closer to the transmitted light intensity and the collimated light intensity 3, the light source utilization is better. The aforementioned design has reached soil 15. The light comes at a half-angle, which is significantly improved compared to the half-angle of the 25 ° beam of the earlier soil. In addition, the design of the US patent us 5, 839, S12 achieves the beam collimation effect by the diffraction of a series of light-transmitting cones lb on the light-transmitting flat plate 2. The national patent us 6, 327,091 B1 and US 5, 839, 812 can provide the collimated light source, the utilization rate of the light source is still low. Furthermore, the US patent US 'b, 839, 812 has a complicated structure, high production cost and disadvantage In view of the above, in view of this, the present invention discloses a light beam collimation device and collimation type using a simple structure and a high light source utilization rate by utilizing the refraction and total reflection beam characteristics of the light-transmitting cone itself. Area light source. 3. Summary of the Invention: The main Θ of the present invention is to disclose a beam collimation device that concentrates light in a small angle and has a high light source utilization rate. Another aspect of the present invention is to disclose a collimated light source having a light-shielding area having J-reflected light on a light-projecting surface to increase the intensity of incident light. Another aspect of the present invention is to disclose a collimated surface light source with a large irradiation area and no need for a light guide plate. Another object of the present invention is to disclose a light source that can utilize a variety of different light sources, such as white bulbs, fluorescent tubes, mercury lamps, metal tooth lamps, cold-cathode tubes and hot-cathode tubes. A collimated surface light source required by the diffusion angle. The beam collimation device of the present invention includes a light-transmitting substrate, a plurality of light-transmitting cones, and a screen. Each single light-transmitting cone system has a smaller projecting surface and a larger area exiting surface. Each single ™ light-transmitting cone system is attached to the aforementioned screen with the smaller projection surface, and the larger The emitting surface is attached to the light-transmitting substrate. As a result, a plurality of light-transmitting regions are formed on the aforesaid burial screen at the abutment with the projection surface of the plurality of light-transmitting cones. Light that is projected beyond the transparent area of the screen will be reflected back. After the projected light enters the plurality of light-transmitting cones through the plurality of light-transmitting areas on the screen, the light beam can be collimated by the total reflection of the peripheral surface of the light-transmission cone and the refracting effect of the projection and exit surfaces, and emitted from the light-transmitting substrate. A collimated surface light source concentrated in a small-angle fan garden. Each of the aforementioned light-transmitting cones may have a single cone section, or a plurality of cone sections whose opening angle gradually decreases toward the projection direction. The shape of the light-transmitting cone can cause a collimated surface light source with the emitted light concentrated in a small angle, thereby improving the light source utilization rate. The technical content of the present invention will be described in detail below with reference to the drawings. 4. Embodiments: As shown in FIG. 3 to FIG. 5, the beam collimation device of the present invention achieves the optical collimation effect through the refraction and total reflection of light in the refracting body. Figure 3 reveals that light passes through a flat head. The path of the light-transmitting cone 10a, which is symmetrical about the central axis, has a smaller top surface 11a and a larger bottom surface i2a, respectively, and an opening σ angle 2α. The light transmitting cone 10a is made of a material having a refractive index t1. When light passes from the aforementioned top surface Ua through the flat-headed light-transmitting cone 10a, it has an incident angle with respect to the peripheral surface 13a, and according to Snell's optical reflection law 589467, a refraction angle is generated within the flat-headed light-transmission cone. When light is scattered, its maximum refraction angle is 0c, which can be expressed by the following formula: Θc-z sin · '1 (1 / n) as shown in Figure 3, where α < 0c, the light is in a flat-headed light-transmitting cone; L 〇a moves along the maximum refraction angle and forms an angle with the side surface of the cone (person:-α, and reflects with the central axis at the following angles respectively: when 2 α < β =-2 α, or When 2α > xi (:, xi = 2 α — heart, finally, the light is emitted from the refractor at an exit angle of 0 (: 〇 ::: sin-1 (n sin Θ). Figure 4 reveals that the light is at a refraction The path in the body is composed of a first light-transmitting cone section 131a and a second light-transmitting cone section 131b. The first and second light-transmitting cone sections are connected coaxially. Two flat-headed cones, wherein the bottom surface 12b of the first light-transmitting cone segment is directly connected to the top surface 11c of the second light-transmitting cone segment. The top surface of the first light-transmitting cone segment is 1 lb The area of the refracting body projecting surface is H1, and the bottom surface 12c of the second light-transmitting cone section forms the surface of the refracting body exiting area of H2. The first and second areas The opening angle division of the light cone section is a! And its fa: t > α2. The refracting body with two cone sections can compress the light exit angle, thereby connecting to a better light collimation effect. The use of multi-axis coaxial cone sections, or multi-segmented fox-shaped peripheral cone sections bent towards the central axis is more effective, as shown in Figures 5a to 5d, where lid, lie, Ilf, and llg respectively represent Top surface 6
Uci，I2e，12f及12g分別表示底面；13d表示周緣 表面；131c，131d，131e，131f，131g 及 131 工 表示錐體區段。 根據前述設計，其光源利用率可達 η 〇c Η1/Η2。 因此，使用多數錐體區段或者前述之弧形周緣錐體區段 構成之折射體，可達到更高之光源利用率。 參見圖1，係本發明之第一實施例，其中包括一透光 錐収10及一屏幕2Q。該透光錐體10係以一縱向之中袖 線為對稱_心，且於横向具有一平坦之投射面u，及與 邊投射面11相對且平行之一平坦之射出面12。該投射 面11及射出面12係具有相同形狀，可分別為長條形、 長方形、方形、多面形、圓形、橢圓形及其他形狀。該 投射面11之面積係小於該射出面12。該透光錐體10係 具杳單一之錐體區段131，或分割成複數之錐體區段 L31P。前述各錐體區段（131，131P)係具有一共同之 周緣表而13相對於中軸傾斜，且各於縱向位置具有介於 Γ到6〇°之間之開口角度。任意兩開口角度不同之相 鄰透光錐體區段1打，距離射出面U愈近者開口角度愈 小。各單一之錐體區段（131，131Ρ)之開口角度係保 持一定或者朝射出面方向逐漸縮小。該屏幕2(]係裝 設於透光錐體10之投射面1]，於是屏幕上排列有面積 不大於透光錐體10之出射面之透光區域。該屏幕 20之透光區域21以外之區域係為高反射材料，如銀、 589467 鋁、銅等，構成之遮光區域22。當光線投射到遮光區域 22時，將受到阻隔而無法通過屏幕2〇。 該屏幕20搆成一中空腔體4〇之壁面。該中空腔 體40之内表面41係具有高反射性。該中空腔體4〇内 部裝設有一光源60。當光源6〇啟用時，該中空腔體4() 内充滿散射光線，並且從該中空腔體40之内表面41 以及遮光區域22進行反射。該中空腔體40可根據使 用需求塑造外形，如交通工具與室内照明器、探照燈、 液晶顯示為之背光椒組及投影機光源。該腔内光源 可為各種類型之光源，如白熾燈泡、日光燈管、汞燈、 金屬論化族燈、冷陰極管與熱陰極管等。 擴散光線經由屏幕20之透光區域21通過透光錐體 10，藉由透光錐體10周緣表面之折射及全反射作用而達 到準直，如前所述，將使從透光錐體10之射出面12射 出之光束成為集中在小角度内之準直型面光源。 投射面與射出面11、12及透光錐體10之開α角 度最好能夠形成土 15°之半輻角。 參見圖6，係本發明之第二實施例，係具有贴附於 中空腔體40之透光錐體10，該中空腔體40内部裝設 有一光源60，如第一實施例之情形。該中空腔體4〇之 一側邊係由一光闡平板23構成。該光闌平板23係以 内側面向光源，且表面為高反射材料構成。 參見圖7，係本發明之第三實施例，其中包括一透 光基板30r，係為排列有複數透光錐體陣列之一平 8 589467 板’其中該透光錐體l〇r之出射面12r係以中軸垂直 對準該透光基板30r贴附其上。各單一透光錐體l〇r 係具有小於2臟之長度與寬度。一屏幕20r係置於 该複數透光錐體1 Or之投射面11 r構成之陣列，於是 在屏幕2Or上形成了由透光錐體iQr之投射面iir組 成之透光區域21r陣列。該屏幕於該透光區域21r以 外之區域係為高反射材料構成之遮光區域22r。投射到 該遮光區域22r之光線將受到阻隔，無法通過屏幕 20r。於是，屏幕20r、複數透光錐體10r以及透光基 板3〇r構成一光束準直板80r，其主軸線係與該複數透 光錐體1 Or之中軸互相平行。 經由該屏幕2Qr之透光區域21r進入該透光錐體 l〇r之散射光線係籍由該透光錐體i〇r周緣表面I3r 之折射及全反射作用而產生對準該光束準直板80r集中 在小角度内之準直型面光源。 參見圖8，本發明之第四實施例係於本發明之第三 實施例裝設一導光板50，該導光板5〇係具有一裝設有 光源組61之第一端部51及一表面為高反射材料構成 之第二端部52，介於該第一與第二端部51、52之間形 成一擴散反射面53，該擴散反射面53之對侧為一出光 面54。該導光板50之出光面Ϊ54係由前述光束準直板 80r構成。當光源組61啟用時，該導光板5〇上充滿 散射之光線，從該導光板遠端52之擴散反射面53 以及遮光區域22r反射。散射光線將穿過前述屏幕20r 9 589467 之透光區域21r，並從透光基板3〇r射出集中於小角度 内之準直型光源。 參見圖9a，本發明之第五實施例係於本發明之第 三實施例裝設一反射板。該反射板7〇係具有一擴散 反射面70a及一平坦之底面70b，該擴散反射面係具有 一連串表面為反射材料之平行並排之菱鏡。光源6〇 從光束準直板8Q射出大致與該光束準直板8Q之主軸 平行之光線，再經由該反射板7Q以90°反射。較佳之 情況為該反射板70相對於該光束準直板80之主軸以 a <. ίο之小角度傾斜。因此，產生一可通過相 當大範圍之準直型光線，特別適宜液晶顯示器之應用。 或者，如圖9b所示，兩套光學裝置各具有一光源 60 ’ 一中空腔體40，及一光束準直板80對稱地装置於 該反射板70之兩側，該光朿準直板8〇之主軸係相對 於該反射板70以一 α < 1〇。之小角度傾斜。 參見圖10，本發明之第六實施例揭示一反射板7〇 在其反射面具秀一元排列之四方錐鏡72陣列，其中各 四方錐鏡72係具有矩形之底部，錐鏡之表面係為高反 射材料。四套光學裝置90 (如圖9b所示）各具有一光 源6〇，一中空腔體4〇，及一光束準直板8〇對稱地裝 置於該反射板70之四邊，該光束準直板8Q之主轴係 相對於該反射板70以一 α < ι〇°之小角度傾斜。 當本發明之透光錐體之開α角度減少且投射面面積 增加時，而增加光束射出之擴散角度，譬如，土 25。 10 589467 之光束半輻诗，因而可形成多樣化擴散角度之面光源。 參見圖11，係本發明之第七實施例，其中R.G.Be 彩色濾光片211、212、213係贴附於屏幕2〇之透光 區域21，構成一分色之光束準直裝置，可省去其他彩 色濾光片之使用，特別有利於彩色液晶顯示器之應用。 本發明之内容非僅受上述實施例之限制，凡在本發 明技術範園内所作之修飾或變化亦隸屬於本發明之申請 專利範圍。 五、圖示簡單說明： 圖1係本發明第一實施例之示意圖。 圖2揭示習知不同形狀之折射體之示意圖。Uci, I2e, 12f, and 12g represent the bottom surface; 13d represents the peripheral surface; 131c, 131d, 131e, 131f, 131g, and 131 are cone sections. According to the aforementioned design, the light source utilization rate can reach η 〇c Η1 / Η2. Therefore, the use of the refractors composed of most of the cone sections or the aforementioned arc-shaped peripheral cone sections can achieve higher light source utilization. Referring to Fig. 1, a first embodiment of the present invention includes a light-transmitting cone 10 and a screen 2Q. The light-transmitting cone 10 is symmetrical about a longitudinal middle sleeve line, and has a flat projection surface u in the lateral direction, and a flat projection surface 12 opposite to and parallel to the side projection surface 11. The projecting surface 11 and the exiting surface 12 have the same shape, and can be respectively rectangular, rectangular, square, polyhedral, circular, oval, and other shapes. The area of the projection surface 11 is smaller than that of the emission surface 12. The light-transmitting cone 10 has a single cone section 131 or is divided into a plurality of cone sections L31P. Each of the aforementioned cone sections (131, 131P) has a common peripheral table and 13 is inclined with respect to the central axis, and each has an opening angle between Γ and 60 ° in the longitudinal position. Any two adjacent openings with different opening angles are adjacent to each other, and the opening angle is smaller as the distance from the exit surface U is closer. The opening angle of each single cone segment (131, 131P) is kept constant or gradually decreases toward the exit surface. The screen 2 (] is installed on the projection surface 1 of the light-transmissive cone 10], so that the light-transmissive area with an area not larger than the exit surface of the light-transmissive cone 10 is arranged on the screen. The light-transmissive area 21 of the screen 20 is outside The area is a highly reflective material, such as silver, 589467 aluminum, copper, etc., which constitutes the light-shielding area 22. When light is projected onto the light-shielding area 22, it will be blocked and cannot pass through the screen 20. The screen 20 constitutes a hollow cavity The wall surface of 40. The inner surface 41 of the hollow cavity 40 is highly reflective. The hollow cavity 40 is provided with a light source 60 inside. When the light source 60 is activated, the hollow cavity 4 () is filled with scattering. The light is reflected from the inner surface 41 and the light-shielding area 22 of the hollow cavity 40. The hollow cavity 40 can be shaped according to the use requirements, such as vehicles and indoor illuminators, searchlights, liquid crystal display backlight peppers and Projector light source. The light source in the cavity can be various types of light sources, such as incandescent bulbs, fluorescent tubes, mercury lamps, metallized family lamps, cold cathode tubes and hot cathode tubes, etc. The diffused light passes through the light-transmitting area 21 of the screen 20. Through light The body 10 is collimated by the refraction and total reflection of the peripheral surface of the light-transmitting cone 10, and as described above, the light beam emitted from the exit surface 12 of the light-transmitting cone 10 will be concentrated in a small angle. Collimated surface light source. The opening α angle between the projection surface and the emission surface 11, 12 and the light-transmitting cone 10 should preferably form a semi-radial angle of 15 °. See FIG. 6, which is a second embodiment of the present invention. The light transmitting cone 10 is attached to the hollow cavity 40, and a light source 60 is installed inside the hollow cavity 40, as in the case of the first embodiment. One side of the hollow cavity 40 is illuminated by a light. The diaphragm plate 23 is composed of the diaphragm plate 23 with the inner side facing the light source and the surface of which is made of a highly reflective material. Referring to FIG. 7, it is a third embodiment of the present invention, which includes a light-transmitting substrate 30r, which is arranged with a plurality of transparent lenses. One of the light cone arrays is a flat 8 589467 plate, in which the exit surface 12r of the light transmitting cone 10r is vertically aligned with the central axis and attached to the light transmitting substrate 30r. Each single light transmitting cone 10r has Less than 2 dirty length and width. A screen 20r is placed on the projection of the multiple light-transmitting cone 1 Or An array of 11 r is formed on the screen 2Or, and an array of light-transmitting areas 21r composed of the projection surface iir of the light-transmitting cone iQr is formed on the screen. The area outside the light-transmitting area 21r is a light-shielding material made of highly reflective material. Area 22r. The light projected into the light-shielding area 22r will be blocked and cannot pass through the screen 20r. Therefore, the screen 20r, the plurality of light-transmitting cones 10r, and the light-transmitting substrate 30r constitute a beam collimating plate 80r, and its main axis is related to The middle axes of the plurality of light transmitting cones 1 Or are parallel to each other. The scattered light entering the light transmitting cone 10r through the light transmitting region 21r of the screen 2Qr is refracted by the peripheral surface I3r of the light transmitting cone i0r. And total reflection to produce a collimated surface light source that collimates the beam collimating plate 80r and concentrates it within a small angle. Referring to FIG. 8, a fourth embodiment of the present invention is a third embodiment of the present invention. A light guide plate 50 is provided. The light guide plate 50 has a first end portion 51 and a surface on which a light source group 61 is installed. A second end portion 52 made of a highly reflective material is formed between the first and second end portions 51 and 52 to form a diffuse reflection surface 53. The opposite side of the diffuse reflection surface 53 is a light emitting surface 54. The light exit surface Ϊ54 of the light guide plate 50 is composed of the aforementioned beam collimating plate 80r. When the light source group 61 is activated, the light guide plate 50 is filled with scattered light, and is reflected from the diffuse reflection surface 53 and the light shielding area 22r of the far end 52 of the light guide plate. The scattered light will pass through the light-transmitting area 21r of the aforementioned screen 20r 9 589467, and be emitted from the light-transmitting substrate 30r to a collimated light source concentrated in a small angle. Referring to Fig. 9a, a fifth embodiment of the present invention is provided with a reflection plate in the third embodiment of the present invention. The reflecting plate 70 has a diffuse reflection surface 70a and a flat bottom surface 70b. The diffuse reflection surface has a series of parallel side-by-side diamond mirrors whose surface is a reflective material. The light source 60 emits light from the beam collimating plate 8Q, which is approximately parallel to the main axis of the beam collimating plate 8Q, and then reflects through the reflecting plate 7Q at 90 °. Preferably, the reflecting plate 70 is inclined at a small angle a <. ο with respect to the main axis of the beam collimating plate 80. Therefore, a collimated light which can pass a relatively large range is generated, which is particularly suitable for the application of liquid crystal displays. Alternatively, as shown in FIG. 9b, each of the two optical devices has a light source 60 ', a hollow cavity 40, and a beam collimation plate 80 symmetrically arranged on both sides of the reflection plate 70. The light collimation plate 80 The main axis is relative to the reflecting plate 70 by α < 10. Tilt at a small angle. Referring to FIG. 10, a sixth embodiment of the present invention reveals an array of quadrangular cone mirrors 72 arranged in a unitary manner on a reflecting mask, wherein each quadrangular cone mirror 72 has a rectangular bottom and the surface of the cone mirror is high Reflective material. Four sets of optical devices 90 (as shown in FIG. 9b) each have a light source 60, a hollow cavity 40, and a beam collimator plate 80 symmetrically arranged on four sides of the reflection plate 70. The beam collimator plate 8Q The main axis is inclined with respect to the reflecting plate 70 at a small angle of α < When the opening α angle of the light-transmitting cone of the present invention is reduced and the area of the projection surface is increased, the diffusion angle of the light beam is increased, for example, soil 25. The beam of 10 589467 is half-radial, so it can form a surface light source with diversified diffusion angles. Referring to FIG. 11, it is a seventh embodiment of the present invention, wherein the RGBe color filters 211, 212, and 213 are attached to the light-transmitting area 21 of the screen 20 to form a color separation beam collimation device, which can save The use of other color filters is particularly beneficial to the application of color liquid crystal displays. The content of the present invention is not limited only by the foregoing embodiments, and any modification or change made in the technical park of the present invention also belongs to the scope of patent application of the present invention. V. Brief description of the diagram: FIG. 1 is a schematic diagram of the first embodiment of the present invention. FIG. 2 is a schematic diagram of a conventional refracting body with different shapes.
Eil 3揭不光線在具有單一錐體區段之透光錐體内折 射及全反射之示意圖。 圖4揭示光線在具有兩不同開口角度之錐體區段之 透光錐體内折射及全反射之示意圖。 圖5a〜Sd揭示光線在具有多段平直或弧形周緣表 面之錐體區段之透光錐體内折射及全反射之示 意圖。 圖6係本發明第二實施例之示意圖。 圖7係本發明第三實施例之示意圖。 國8係本發明第四實施例之示意圖。 圖9a及9b係本發明第五實施例之示意圖。 圖10係本發明第六實施例之示意圖。 圖11係本發明第七實施例之示意圖。 η 589467 圖號說明= 透光球體 la 透光錐體lb 透光平板 2 透光錐體 10，10a，lOr 投射面 11，llr 頂面 11a > lib ，：Lie，lid，lie，Ilf，llg 射出面 12，12r 底面 :L2a，12b ，12c，12d，12e，12f，12g 周緣表面 13，13a，: L3r 屏幕 20，20r 錐體區段 131，::L31a ，131b，131c，131d，131e，131f 13:lg，13:lh，131，131P 透光區域 21» 21r 遮光區域 22，22r 光閣平板 23 R.G.B.彩色濾光片 211 > 212、213 透光基板 30，30r 中空腔體40 内表面 41 導光板 50 第一端部 51 第二端部52 擴散反射面53 出光面 54 光源 60 光源組 61 反射板 70 反射面 70a 底面 7 0b 菱鏡 71 四方錐鏡 72 光束準直板80，8Or 光學裝置 90Eil 3 is a schematic illustration of light refracting and total reflection in a light transmitting cone with a single cone segment. FIG. 4 is a schematic diagram illustrating the refraction and total reflection of light in a light-transmitting cone of a cone section having two different opening angles. Figures 5a to Sd reveal the schematic representations of the refraction and total reflection of light in a light-transmitting cone of a cone section with multiple straight or curved peripheral surfaces. FIG. 6 is a schematic diagram of a second embodiment of the present invention. FIG. 7 is a schematic diagram of a third embodiment of the present invention. Country 8 is a schematic diagram of a fourth embodiment of the present invention. 9a and 9b are schematic views of a fifth embodiment of the present invention. FIG. 10 is a schematic diagram of a sixth embodiment of the present invention. FIG. 11 is a schematic diagram of a seventh embodiment of the present invention. η 589467 Explanation of drawing number = transparent sphere la transparent cone lb transparent plate 2 transparent cone 10, 10a, lOr projection surface 11, llr top surface 11a > lib: Lie, lid, lie, Ilf, llg Shooting surface 12, 12r Bottom surface: L2a, 12b, 12c, 12d, 12e, 12f, 12g Peripheral surface 13, 13a: L3r Screen 20, 20r Cone section 131: :: L31a, 131b, 131c, 131d, 131e, 131f 13: lg, 13: lh, 131, 131P Light-transmitting area 21 »21r Light-shielding area 22, 22r Light plate 23 RGB color filter 211 > 212, 213 Light-transmitting substrate 30, 30r Hollow cavity 40 Inner surface 41 light guide plate 50 first end 51 second end 52 diffuse reflection surface 53 light exit surface 54 light source 60 light source group 61 reflection plate 70 reflection surface 70a bottom surface 7 0b diamond mirror 71 square cone lens 72 beam collimation plate 80, 8Or optical device 90