200923507 九、發明說明·· 【發明所屬之技術領域】 本發明係關於一種面光源裝置，尤指—種使用一高透 明度超白玻璃作為導光板之面光源裝置。 回 【先前技術】BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface light source device, and more particularly to a surface light source device using a high transparency ultra-clear glass as a light guide plate. Back [previous technology]
爲了得到光源亮度均勻的輸出，許多光源裝置設計 係朝著平面化結構發展。平面背光源之應用範圍相當廣 泛’包含LCD之背光源、平面圖案之背光源、照明用:平 面背光源、以及指示燈用之背光源，皆需要均勻平面背光 的使用始可達到-定之功效。目前商業用之背光源主要分 為兩種’一為直下式（direct_type)背光，另一為側照式 (W=ype)背光。直下式背光，如圖丨所示，通常包括有冷 陰極管（CCFL，Cold Cathode FlU0rescent Lamp)62、擴散板 6卜反射板63、燈管固定座64等元件。冷陰極管62配置於 擴散板61下方’藉由擴散板61將冷陰極管62所發出之光線 轉變成為-均勻的平面光源。同時在冷陰極管下方設置反 射板63,使冷陰極管所發出之光線向上反射達到增加亮度 的效果。 側照式者光，如圖2所示，是由導光板5丨、冷陰極管 53、反射燈罩52、光學膜片54、反射片55等元件所構成。 冷陰極53管裝設於導光板之入光面56側，並且冷陰極管 53旁設置有反射燈罩52。反射燈罩52環繞冷陰極管53，使 冷陰極管53所發出之光線向導光板51之入光面％射入。然 200923507 後經由導光板51内部的光學設計（例如，具有導出光線的 圖案）’使光線由導光板5 1的出光面發射出來。 目前側照式背光結構中，其導光板5丨皆使用如壓克 力、聚碳酸酯（pc)、聚曱基丙烯酸甲酯（PMMA)等透明塑膠 5板所構成，但卻具有如下之缺點：（1)剛性較差，面積大時 容易扭曲；（2)易受熱膨脹而變形；（3)易受熱而裂化；以 及（4)不耐高溫且易燃。但若採用玻璃材質之導光板，則可 大幅減少上述此些缺點。然而，一般玻璃之穿透率，以 厚度為例，僅約86%(以下所稱的穿透率皆係以光譜 1〇儀的光源對玻璃板的表面進行垂直入射加以量 測，並取550 nm波長所得的穿透率為準。）。側照 光線將隨著在玻璃中行走的距離而產生明顯的衰退現象， 進而造成光度的損耗，因此至今未見到使用玻璃材質作為 導光板之應用。 15 【發明内容】 爲解決上述之困難，本發明係使用一穿透率達9〇%以 上之超白玻璃用以作為一側照式背光導光板，其可降低光 源因通過玻璃材質所減少的亮度損失，並具有剛性佳、受 2〇熱不易膨脹變形、耐高溫等優點。超白玻璃⑽ra-Clea]r glass) 又稱低鐵玻璃（l〇W-iron g丨ass)，此種玻璃係使用特殊的工藝 技術製成，其具有極高的穿透率，能提供非常好的視覺效 果。因此將其應用於平面背光，如：液晶顯示器之背光， 200923507 可除去原本使用透明塑膠板作為導光板所 亦可改善-般玻璃之穿透率低的情形。 F w 1 =明之主要目的係在提供—種側照式面光源 5 二破二超白玻璃導光板以及至少—側照光源。其 光板具有一第一表面、一相對於該第一表面之 :::::垂直於第一表面及第二表面之第三表面以及 板之第一：、面之第四表面。側照光源係配置於玻璃導光 〇 並發出光線至破璃導光板中。玻璃導光板 、、有-導先圖案係配置於第二表面，並用以將光線經由 10 :案導出。並且’破璃導光板為-穿透率達90%以上In order to obtain a uniform output of the light source, many light source device designs have evolved toward planar structures. Flat-panel backlights are used in a wide range of applications, including LCD backlights, planar pattern backlights, lighting: flat backlights, and backlights for indicator lights, all of which require uniform planar backlighting to achieve the desired performance. Currently, commercial backlights are mainly classified into two types: a direct-type backlight and a side-lit (W=ype) backlight. The direct type backlight, as shown in Fig. ,, usually includes a cold cathode tube (CCFL, 62), a diffuser plate 63, a lamp holder 64, and the like. The cold cathode tube 62 is disposed below the diffusion plate 61. The light emitted from the cold cathode tube 62 is converted into a uniform planar light source by the diffusion plate 61. At the same time, a reflecting plate 63 is disposed under the cold cathode tube to reflect the light emitted from the cold cathode tube upward to increase the brightness. As shown in Fig. 2, the side-lit light is composed of a light guide plate 5, a cold cathode tube 53, a reflector cover 52, an optical film 54, and a reflection sheet 55. The cold cathode 53 tube is mounted on the light incident surface 56 side of the light guide plate, and a reflection lamp cover 52 is disposed beside the cold cathode tube 53. The reflecting lamp cover 52 surrounds the cold cathode tube 53, so that the light emitted from the cold cathode tube 53 is incident on the light incident surface of the light plate 51. After 200923507, light is emitted from the light-emitting surface of the light guide plate 51 through an optical design (for example, a pattern having light-extracting light) inside the light guide plate 51. In the current side-lit backlight structure, the light guide plate 5 is formed of a transparent plastic 5 plate such as acrylic, polycarbonate (PM) or polymethyl methacrylate (PMMA), but has the following disadvantages. (1) Poor rigidity, easy to twist when the area is large; (2) susceptible to thermal expansion and deformation; (3) susceptible to heat and cracking; and (4) not resistant to high temperatures and flammable. However, if a glass light guide plate is used, these disadvantages can be greatly reduced. However, in general, the transmittance of glass is, for example, only about 86% of the thickness (the penetration rate referred to below is measured by the vertical incidence of the surface of the glass plate by the source of the spectrum 1 , instrument, and taken 550. The transmittance obtained by the nm wavelength is accurate.). Sidelights Light will cause significant degradation with the distance traveled in the glass, which in turn causes loss of luminosity. Therefore, the use of glass as a light guide has not been seen so far. 15 SUMMARY OF THE INVENTION In order to solve the above difficulties, the present invention uses an ultra-white glass with a transmittance of more than 9% by weight as a side-lit backlight light guide plate, which can reduce the light source due to the reduction of the material through the glass. Loss of brightness, and has the advantages of good rigidity, deformation by 2 heat, deformation resistance, and high temperature resistance. Ultra-white glass (10)ra-Clea]r glass) Also known as low-iron glass (l〇W-iron g丨ass), this glass is made using special process technology, which has a very high penetration rate and can provide very Good visual effect. Therefore, it can be applied to a flat backlight, such as a backlight of a liquid crystal display, and 200923507 can remove the original use of a transparent plastic plate as a light guide plate to improve the low penetration rate of the glass. The main purpose of F w 1 = Ming is to provide a side-illuminated surface light source 5 two broken two ultra-white glass light guide plates and at least a side light source. The light panel has a first surface, a third surface opposite to the first surface and the second surface, and a first surface of the surface, and a fourth surface of the surface. The sidelight source is placed in the glass light guide and emits light into the glass guide. The glass light guide plate and the pre-guide pattern are disposed on the second surface and are used to guide the light through the 10: case. And the 'glass glazing plate is - the penetration rate is over 90%
= 度超白玻璃’使m在行徑過程中不致發生明顯 的光衰減現象。 h i Θ W 15 於^明之難式面光源裝置中，其朗導光板可更 光圓案配置於第一表面，而使第—及第二表面皆 成-雙面發光之面光源。 及弟-表面射出，形 :本發明之側照式面光源裝置中，導光圖 由塗漆而形成。 於本發明之側照式面光源裝置中’導光圖案較佳可經 由钱刻法、雕刻法、喷砂法'印刷法或其組合所形成。 於本發明之側照式面光源裝置中，導光圖案可選自一 由圓點、方塊、線條、不規卿狀及其組合所組成之群组， 以形成具有所欲達到之導光效果之圖案。 、 20 200923507 於本奴明之側照式面光源裝置中，該側照光源較佳可 包括-燈罩，係用以將側照光源所發出之光線導弓！朝向入 射面並射入玻璃導光板中。 於本發明之側照式面光源裝置中，該側照光源較佳可 5 包括一電路控制系統。 於本电日月之側照式面光源裝i中，玻㉟導光板較佳可 更具有至少一光學膜片配置於第一或第二表面。 於本發明之側照式面光源裝置中，光學膜片可選自一 由擴散片以及增亮片所組成之群組，以可獲得更多種類的 10 光學表現。 於本發明之側照式面光源裝置中，玻璃導光板較佳可 具有-反射片係配置於該第一表面、第二表面或第四表 面，使光線由相對第二或第一表面射出。 於本發明之側照式面光源裝置中，反射片可為一反射 15金屬膜，以使光線僅由該表面之相對第二或第一表面射 出，而得到更大的亮度。 於本發明之側照式面光源裝置中，其反射金屬膜可經 由鍍膜或貼附金屬膜片而配置於玻璃導光板之第一或第二 表面。 20 於本發明之側照式面光源裝置中，其可包括二個側照 光源分別配置於第三表面及第四表面，以增加亮度。 於本發明之側照式面光源裝置中，其可更包括一第五 表面（垂直於該第一表面、第二表面、第三表面及第四表面） 以及一第六表面（相對於第五表面），並取四個側照光源配置 200923507 位於上述破璃導光板中之第三表面、第四表面、第五表面 及第六表面，使更增加光源亮度。 於本發明之側照式面光源裝置中，其側照光源較佳可 為一發光二極體（Light-Emitting Diode，LED)，但不限於 5 此。 於本發明之側照式面光源裝置中，其側照光源較佳亦 可為一冷陰極管（Cold Cathode Fluorescent Lamp, CCFL)， 但不限於此。 於本發明之側照式面光源裝置中，其側照光源較佳亦 10 可為一氙燈，但不限於此。 於本發明之側照式面光源裝置中，其導光板較佳亦可 為一弧型面，但不限於此。 【實施方式】 15 後續將伴隨著實施例’更詳細地描述本發明之面光源 裝置。 f施例1 請參閱圖3，其係本實施例丨之面光源裝置，包括一片 超白玻璃導光板1以及二個側照LED光源卜其中，該超白 2〇破璃導光板i具有一第一表㈣、—相對於第一表面n之第 二表面12、以及二入光面21垂直於第一表㈣及第二表面 12j超白玻璃導光板丨並具有一白漆鋪點的導光圖案η配置 於第表面11及第二表面12。二個側照led光源2，分別且 有-燈罩22以及-電路控制系助，係配置於玻璃導光板; 200923507 之入光面21。並發出一入射光31至超白玻璃導光板丨中，最 後由第一表面11及第二表面12發出出射光32。 於本實施例中，玻璃導光板丨之第一表面u及第二表面 U皆具有白漆鋪點的導光圖案13，光線由入光面21進入 5後，由第一表面11及第二表面12射出，使實施例之面光源 裝置形成一雙面發光之裝置。 貫施例2 睛參閱圖4 ’其係本實施例2之面光源裝置，如同實施 10例1，係包括一片超白玻璃導光板1以及二個侧照LED光源 2。其不同處為’本實施例2之第一表面丨丨係具有一蝕刻鋪 點圖案15，第二表面12具有一金屬鍍膜層14。入射光31由 入射面21進入超白玻璃導光板丨後，經由金屬锻膜層14反射 而使光線僅由第一表面Π射出，以增加出射光32之光量。 15 實施例3 請參閱圖5，其係本實施例3之面光源裝置，包括一片 超白玻璃導光板1以及一個側照LEd光源2。其中，該超白 玻璃導光板1之第一表面Π不具有任何圖案，而第二表面12 20 具有一白漆鋪點的導光圖案13以及一金屬鍍膜層14。側照 LED光源2發出入射光31後，入射光31經由入射面21進入超 白玻璃導光板1，再由第一表面11射出。 實施例4 200923507 請參閱圖6，其係本實施例4之面光源裝置，包括一片 超白玻璃導光板1以及一個側照冷陰極燈管4。其中，該超 白玻璃導光板1之第一表面U具有一白漆鋪點的導光圖案 13，而第二表面12黏貼有一反射膜片16。側照冷陰極燈管* 5具有一燈罩41以及一電路控制系統42。如同上述實施例3， 本實施例之侧照冷陰極燈管4發出入射光31後，入射光31經 由入射面21進入超白玻璃導光板丨，再由第一表面丨丨射出。 於上述實施例中，側照光源之數量不限於丨個或2個， 亦可增加至3個或4個側照光源，以達到更大的亮度。 10 實施例5 凊參閱圖7，其係本實施例5之面光源裝置，包括一片 超白玻璃導光板丨以及四個側照冷陰極燈管4。於本實施例 中，超白玻璃導光板1具有四個入射面21，第一表面u具有 一蝕刻鋪點圖案17，為一漸進式疏密排列之圓點圖案，而 15第二表面12黏貼有—反射膜片16。側照冷陰極燈管4分別具 有一燈罩41以及一電路控制系統42。側照冷陰極燈管4發出 入射光31後，入射光31經由入射面21進入超白玻璃導光板 1，再由第一表面Π射出出射光32。在本實施例中，使用了 四個側照冷陰極燈管4，可使亮度提升，於大尺寸背光光源 20 之應用上更具優勢。 實施例6 請筝閱圖8，其係本實施例6之面光源裝置。本實施例 之面光源裝置除了具有與實施例4相同之特徵以外，更特別 地，本實施例於相對入射面21之一側面24加設有一反射片 11 200923507 18,可用以阻擋側照冷陰極燈管4射出之入射光31 ’以避免 入射光31由側面24射出，而造成漏光現象。 實施例7 a月參閱圖9 ’其係本實施例7之面光源裝置。本實施例 5中包括有二片超白玻璃導光以及配置於兩端之四個側 照冷陰極燈管4。二片超白玻璃導光板i之間具有白漆鋪點 的V光圖案13，並藉由此白漆鋪點的導光圖案13而將二片 超白玻璃導光板1黏合。於本實施例巾，人射光31進入超白 玻璃導光板1後，由兩個第一表面u射出，因此形成一雙面 10照射之面光源裝置。相較於實施例卜本實施例之雙面昭射 之面光源裝置可得到更大的亮度，且白漆鋪點的導光圖案 13僅需塗佈一次即可，可省去一次的加工製程。 於上述實施例中，側照光源不限於㈣光源或冷陰極 燈管，其可為任何側照式光源。燈罩之形式不受限制，可 15使用-般之燈罩，係用以將光源所發出之光線導向入光面 所用t路控制系統使用__般所使用之電路控制系统 可，並無特別限制。 、 於上述實施例中，玻璃導光板之光線射出之表面 具有-光學膜片為選自一由反射片、擴散片、以及增 20所組成之群組，用以調整獲得更多種類的光學表現。儿 於上述實施例中，玻璃導光板之表面可呈現—弧 面，以作為弧形面的發光或背光源。 乂 於上述實施例中，玻璃導光板可為經強化處理 玻璃或夾有塑膠透明膜的膠合玻璃。 12 200923507 透率：90:本發明之側照式面光源裝置，係使用-穿 板，豆可二之超白玻璃用以作為一側照式背光導光 呈有剛：：：因通過玻璃材質所減少的亮度損失，並 易膨脹變形、耐高溫等優點。因此將 /、應用於面發光源或面背光源，>:液晶顯示琴之背光， 原本使料„職作為導光板所具有的缺點，亦 可改善一般玻璃之穿透率低的缺點。 上述實施例僅係為了方便說㈣舉例而已，本發明所 10 =張之權利範圍自應以申請專利範圍所述為 於上述實施例。 开值I艮 【圖式簡單說明】 圖1係習知一直下式面光源之示意圖。 圖2係習知一側照式面光源之示意圖。 15圖3係本發明之實施例1中面光源裝置之示意圖。 圖4係本發明之實施例2中面光源裝置之示意圖。 圖5係本發明之實施例3中面光源裝置之示意圖。 圖6係本發明之實施例4中面光源裝置之示意圖。 圖7係本發明之實施例5中面光源裝置之示意圖。 20圖8係本發明之實施例6中面光源裝置之示意圖。 圖9係本發明之實施例7中面光源裝置之示意圖。 【主要元件符號說明】 1超白玻璃導光板 32出射光 13 200923507 1 1第一表面 4側照冷陰極燈管 12第二表面 41燈罩 13白漆鋪點的導光圖案 42電路控制系統 14金屬鎮膜層 5 1導光板 1 5蝕刻鋪點圖案 52反射燈罩 16反射膜片 53冷陰極管 17蝕刻鋪點圖案 54光學膜片 2側照LED光源 5 5反射片 2 1入射面 56入光面 22燈罩 61擴散板 23電路控制系統 62冷陰極管 24側面 6 3反射板 3 1入射光 64燈管固定座= Degree of ultra-white glass' so that m does not cause significant light attenuation during the path. h i Θ W 15 In the difficult-to-surface light source device of the illuminating device, the illuminating light guide plate can be arranged on the first surface in a more rounded manner, and the first and second surfaces are all-surface light sources with double-sided illumination. And the surface-emitting, shape: In the side-illuminated surface light source device of the present invention, the light guiding pattern is formed by painting. In the side-lit surface light source device of the present invention, the light guiding pattern is preferably formed by a money engraving method, an engraving method, a sandblasting method, or a combination thereof. In the side-lit surface light source device of the present invention, the light guiding pattern may be selected from the group consisting of dots, squares, lines, irregular shapes, and combinations thereof to form a light guiding effect desired. The pattern. 20 200923507 In Ben Noum's side-lit surface light source device, the side-light source preferably includes a lampshade for guiding the light from the side-light source! It faces the entrance surface and is incident on the glass light guide. In the side-lit surface light source device of the present invention, the side-light source preferably includes a circuit control system. Preferably, the glass 35 light guide plate has at least one optical film disposed on the first or second surface. In the side-lit surface light source device of the present invention, the optical film may be selected from the group consisting of a diffusion sheet and a brightness enhancement sheet to obtain a wider variety of 10 optical performances. In the side-lit surface light source device of the present invention, the glass light guide plate preferably has a reflective sheet disposed on the first surface, the second surface or the fourth surface such that light is emitted from the opposite second or first surface. In the side-lit surface light source device of the present invention, the reflective sheet may be a reflective 15 metal film such that light is emitted only from the opposite second or first surface of the surface to obtain greater brightness. In the side-illuminated surface light source device of the present invention, the reflective metal film may be disposed on the first or second surface of the glass light guide plate by plating or attaching the metal film. In the side-lit surface light source device of the present invention, it may include two side light sources respectively disposed on the third surface and the fourth surface to increase the brightness. In the side-lit surface light source device of the present invention, it may further include a fifth surface (perpendicular to the first surface, the second surface, the third surface, and the fourth surface) and a sixth surface (relative to the fifth surface) The surface is provided with four side light source configurations 200923507 located on the third surface, the fourth surface, the fifth surface and the sixth surface of the glass light guide plate to increase the brightness of the light source. In the side-lit surface light source device of the present invention, the side light source may preferably be a light-emitting diode (LED), but is not limited thereto. In the side-lit surface light source device of the present invention, the side light source may preferably be a Cold Cathode Fluorescent Lamp (CCFL), but is not limited thereto. In the side-lit surface light source device of the present invention, the side light source 10 is preferably a lamp, but is not limited thereto. In the side-lit surface light source device of the present invention, the light guide plate may preferably be an arc-shaped surface, but is not limited thereto. [Embodiment] 15 The surface light source device of the present invention will be described in more detail hereinafter with the embodiment'. f Embodiment 1 Referring to FIG. 3, which is a surface light source device of the present embodiment, comprising an ultra-white glass light guide plate 1 and two side-illuminated LED light sources, wherein the ultra-white 2-inch glass light guide plate i has a The first table (4), the second surface 12 relative to the first surface n, and the second entrance surface 21 are perpendicular to the first table (4) and the second surface 12j, and have a white lacquered guide. The light pattern η is disposed on the first surface 11 and the second surface 12. The two side-lit LED light sources 2 are respectively provided with a lamp cover 22 and a circuit control system, and are disposed on the glass light guide plate; An incident light 31 is emitted into the ultra-white glass light guide plate, and finally, the outgoing light 32 is emitted from the first surface 11 and the second surface 12. In this embodiment, the first surface u and the second surface U of the glass light guide plate have white light-painted light guiding patterns 13 , and the light enters the light-emitting surface 21 and enters the surface 1 , and the first surface 11 and the second surface The surface 12 is ejected so that the surface light source device of the embodiment forms a device for double-sided illumination. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 2 FIG. 4 is a surface light source device of the second embodiment. As in the case of the first embodiment, an ultra-white glass light guide plate 1 and two side-illuminated LED light sources 2 are included. The difference is that the first surface lanthanide of the second embodiment has an etched dot pattern 15 and the second surface 12 has a metal plating layer 14. The incident light 31 enters the ultra-white glass light guide plate by the incident surface 21, and is reflected by the metal forged film layer 14 so that the light is emitted only by the first surface to increase the amount of light emitted from the light 32. 15 Embodiment 3 Referring to Fig. 5, a surface light source device of the third embodiment includes a sheet of ultra-white glass light guide plate 1 and a side-lit LEd light source 2. The first surface Π of the ultra-white glass light guide plate 1 has no pattern, and the second surface 12 20 has a white lacquered light guiding pattern 13 and a metal plating layer 14. After the incident light 31 is emitted from the LED light source 2, the incident light 31 enters the ultra-white glass light guide plate 1 via the incident surface 21, and is then emitted from the first surface 11. Embodiment 4 200923507 Please refer to Fig. 6, which is a surface light source device of the fourth embodiment, comprising a sheet of ultra-white glass light guide plate 1 and a side-illuminated cold cathode lamp tube 4. The first surface U of the ultra-white glass light guide plate 1 has a white lacquered light guiding pattern 13, and the second surface 12 is adhered with a reflective film 16. The side-lit cold cathode lamp* 5 has a lamp cover 41 and a circuit control system 42. As in the third embodiment, after the incident cold light is emitted from the side-illuminated cold cathode lamp 4 of the present embodiment, the incident light 31 enters the ultra-white glass light guide plate through the incident surface 21, and is then ejected from the first surface. In the above embodiment, the number of sidelight sources is not limited to one or two, and may be increased to three or four sidelight sources to achieve greater brightness. 10 Embodiment 5 Referring to Figure 7, the surface light source device of the fifth embodiment comprises a sheet of ultra-white glass light guide plate and four side-illuminated cold cathode tubes 4. In the present embodiment, the ultra-white glass light guide plate 1 has four incident surfaces 21, and the first surface u has an etched dot pattern 17 which is a progressively densely arranged dot pattern, and the 15 second surface 12 is pasted. There is a reflective diaphragm 16. The side-illuminated cold cathode lamps 4 each have a lamp cover 41 and a circuit control system 42. After the incident light 31 is emitted from the side-illuminated cold cathode lamp 4, the incident light 31 enters the ultra-white glass light guide plate 1 via the incident surface 21, and the outgoing light 32 is emitted from the first surface. In the present embodiment, four side-illuminated cold cathode lamps 4 are used, which can increase the brightness and have an advantage in the application of the large-sized backlight source 20. Embodiment 6 Please refer to Fig. 8, which is a surface light source device of the sixth embodiment. In addition to the features of the embodiment, the surface light source device of the present embodiment has a reflection sheet 11 200923507 18 attached to one side surface 24 of the incident surface 21 to block the side cold cathode. The incident light 31' emitted from the bulb 4 prevents the incident light 31 from being emitted from the side surface 24, causing a light leakage phenomenon. Embodiment 7 A month Referring to Fig. 9 is a surface light source device of the seventh embodiment. In the fifth embodiment, two pieces of ultra-white glass light guide and four side-mounted cold cathode fluorescent tubes 4 disposed at both ends are included. The two ultra-white glass light guide plates i have a white lacquered V light pattern 13 between them, and the two white light glass light guide plates 1 are bonded by the light guide pattern 13 which is spotted by the white paint. In the towel of this embodiment, after the human light 31 enters the ultra-white glass light guide plate 1, the two first surfaces u are ejected, thereby forming a double-sided 10-illuminated surface light source device. Compared with the embodiment, the double-sided illuminating surface light source device of the embodiment can obtain greater brightness, and the white lacquered light guiding pattern 13 can be coated only once, and the processing process can be omitted. . In the above embodiment, the sidelight source is not limited to the (four) light source or the cold cathode lamp, which may be any side-illuminated light source. The form of the lampshade is not limited, and the lampshade can be used to guide the light from the light source into the light surface. The circuit control system used is not limited. In the above embodiment, the surface of the light guide plate of the glass light guide plate has an optical film selected from the group consisting of a reflection sheet, a diffusion sheet, and a weight increase of 20 for adjusting a variety of optical performances. . In the above embodiments, the surface of the glass light guide plate may exhibit an arc surface as a light or backlight of the curved surface. In the above embodiment, the glass light guide plate may be a tempered glass or a laminated glass with a plastic transparent film. 12 200923507 Transmittance: 90: The side-illuminated surface light source device of the present invention is a use-through plate, and the ultra-white glass of the bean can be used as a side-lit backlight to have a light::: through the glass material The reduced brightness loss, and easy to expand deformation, high temperature and other advantages. Therefore, the application of /, to a surface light source or a surface backlight, >: the backlight of the liquid crystal display piano, originally used as a light guide plate, can also improve the low transmittance of general glass. The embodiment is only for the convenience of saying (4), and the scope of the present invention is the above-mentioned embodiment as described in the scope of the patent application. Open Value I艮 [Simple Description of the Drawing] FIG. Figure 2 is a schematic view of a conventional side-source light source. Figure 3 is a schematic view of a surface light source device according to Embodiment 1 of the present invention. Figure 4 is a surface light source of Embodiment 2 of the present invention. Figure 5 is a schematic view of a surface light source device according to Embodiment 3 of the present invention. Figure 6 is a schematic view of a surface light source device according to Embodiment 4 of the present invention. Figure 7 is a view of a surface light source device according to Embodiment 5 of the present invention. Fig. 8 is a schematic view of a surface light source device according to Embodiment 6 of the present invention. Fig. 9 is a schematic view showing a surface light source device according to Embodiment 7 of the present invention. [Description of Main Components] 1 Ultra-white glass light guide plate 32 emits light 13 200923507 1 1 first surface 4 side cold cathode lamp 12 second surface 41 lamp cover 13 white paint spotted light guiding pattern 42 circuit control system 14 metal film layer 5 1 light guide plate 1 5 etching dot pattern 52 reflecting lamp cover 16 Reflective film 53 Cold cathode tube 17 Etched spot pattern 54 Optical film 2 Side view LED light source 5 5 Reflecting sheet 2 1 Incidence surface 56 Light-in surface 22 Lamp cover 61 Diffuser plate 23 Circuit control system 62 Cold cathode tube 24 side 6 3 Reflector 3 1 incident light 64 lamp holder
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