1301920 九、發明說明： 【發明所屬之技術領域】 本發明係與面光源裝置的零配件有關，詳而言之，尤 指一種南輝度導光板者。 【先前技術】 習知面光源裝置主要包含一導光板、一發光部及一反 射板構成，其中，導光板係由高折射率之透明樹脂所形成 ’並於其背面加工形成由槽室(cell)所構成的擴散圖案（ pattern)，令導光板一侧面為光射入面，發光部與光射入 面相對’藉以投射絲進人導光板，反射板_設於導光 板具有擴散圖案的背面並具高反射率的片體。 發光部通過光射入面射入導光板内部的光線，在導光 板的表面及背面之間重覆的進行全反射，且親被閉合在 導光板内部向著遠離發光部的方向傳輸，如此一來，在導 光板内傳輸之规，投射至導光姆面時…部份的光被 擴散圖案向導输的表面（令其為光射出©)擴散反射，此 時’朝向光射出面以小於全反射臨界角的角度反射之光線 ，將通過光射出面射出導光板外部，另—部份未受擴散圖 案纖反射的光線，則被反射板反射回到導光板内部，而 再度被閉合在導光板内，以藉由反射板反射減少導光板背 面的光量損失。 #由於從導光板的光射出面射出之光是從大折射率的媒 貝射出到小折射率的媒質’故光線將以偏離光射出面法線 的方向射出，若將沿著光射入面幅度之方向定為X轴，垂 直於光射入面之方向定為Υ軸，垂直於光射出面之方向定 1301920 為z轴’這時由導歧内部通過光㈣ 致上趨近於沿著丫齡向的細魏触難lit =的有效姻約為5。〜1G。，並無法目視察覺此視角範圍 入的射㈣，故通過光射出騎出之光線，無法為人眼完 王接收在這種狀悲下，當從光射出面之垂直方向（z轴方 向)觀看日^ ’目視所得射丨導光板的光線輝度較低，且不 利於發光部的發光效率，故而習知面光源裝置多在導光 板之光射出_上方配合設置稜鏡片，使得從光射出面射 出之光，經由稜鏡片將光集中趨近Z軸方向，藉以提高目 視所得的光線輝度。 由疋可知，若通過光射出面射出光線的指向性型樣可 更趨近於沿著垂直於光射出面的方向（2軸方向），使更多 的光線進入人眼的有效視角，不需依賴稜鏡片的使用，即 了長:局射出導光板的光線在z軸方向的輝度，進而提升發 光部的發光效率，並降低面光源裝置的體積及其製造成本 者。 就另一方面而言，習知面光源裝置係利用發光部的發 光元件作為光源，該發光元件一般有冷陰極管(CCFL)及發 光二極體(LED)兩類，其中，利用LED作為光源之發光元件 係配設複數個LED形成多個點光源，且點光源係通過光射 入面向導光板内部輻射狀投射光線，而習知導光板構成擴 散圖案的槽室（cell)，由Z轴方向觀之，其折、反射光線 的界面係與光射入面平行，如此一來，在導光板内傳輸之 光線投射至擴散圖案時，僅有一部份的光線被擴散圖案向 1301920 光射出面擴散反射，由於LED之間會有一混光距離，易造 f明暗帶相間隔，尤其以鏡面pattern之導光板此等明暗 帶相間隔的情形更為嚴重，遂形成明顯的亮線、暗紋，而 必需利用擴散板使射出導光板的光擴散，進而影響射出導 光板的光線在Z轴方向的輝度降低，且不利於發光部的發 光效率者。 【發明内容】 ,本發明主要目的在於提供一種高輝度導光板，其藉由 首創的擴散圖案’而得以有效提升射出導光板的光線在垂 直於光射出面方向上的輝度，進而提高面光源裝置的發光 效率，並降低面光源裝置的體積及製造成本者。 本务明另一目的在於提供一種適用於具有多個點光源 之面光職置的高輝度導光板，其藉由首綱紐圖案， 而得以使射出導光板的光線得以更平均地分布在光射出面 的各視角，進而避免亮線、暗紋形成者。 【實施方式】 為使本發明之技術特徵、目的及其產生之功效得以獲 致更深入_解與期，轉概可行之具體實施例並配 合圖式說明於后。 本發明第-實施例係較適用於以冷陰極管作為發光元 件之面光源裝置者，請參閱第―、二圖，導光板⑽係由 高折射率之透鴨賴形成的板體，令導光板(1())一侧面 為光射入面（11)，且導光板⑽)表面為光射出面⑽，導 光板(10)於光射出面⑽相對之背面為反射面⑽與光射 1301920 出面（12)平行，導光板（ίο)於反射面（13)凹陷複數個槽室 (14)構成擴散圖案，槽室（14)係排列在與光射入面（11)平 行的複數列直線上，且配置於相鄰列的槽室（14)彼此相錯 ’另外’隨著遠離光射入面（11)，槽室（14)的分佈密度漸 增’如第三圖所示，槽室（14)在垂直於光射出面（12)方向 的斷面係呈非對稱的三角形狀，令槽室（14)鄰向光射入面 (11)側之斜面為第一面（142)，遠離光射入面（11)側之垂 面則為第二面（144) ’第一面（142)與反射面（13)間的傾斜 角/5為45°，第二面（144)與反射面（13)間的夾角τ為90。 ，俾供構成高輝度導光板者。 如第四圖所示，第一實施例應用於利用冷陰極管作為 發光元件（21)之面光源裝置時，光射入面（π)與發光元件 (21)平行相鄰，據使發光元件（21)得以通過光射入面（u) 投射平行光線進入導光板(10)，反射板(22)則貼設於反射 面（13) ’據以反射光線進入導光板（1〇)，且發光元件（21) 射入導光板(10)的光線P在導光板(1〇)的光射出面（12)與 反射面（13)重複進行全反射，同時在導光板（1〇)内以遠離 發光元件(21)的方向前進。 光線P向反射面（13)前進並遇到槽室（14)時，若光線p 與第一面（142)的法線間的夾角小於42· 15。，光線P將通過 第一面（142)進入槽室（14)内，此時的出光軌跡可歸納如 下列三種行進模式·· 1·請參閱第五圖及下式，當6>2<42· 15。，則光線P穿透第 一面（142)進入槽室（14)内，此時： 1301920 Θ b— θ \2 (式 1-1) 06+ 6*7= 04 (式 1-2) θι= Θ% (式 1-3) Α+θ8=9Ο° — 04 (式 1-4) (式 1-5) sin 0 AIR X nAIR=Sin ^ PMMA X ΠρΜΜΑ1301920 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a component of a surface light source device, and more particularly, to a south luminance light guide plate. [Prior Art] A conventional surface light source device mainly comprises a light guide plate, a light-emitting portion and a reflection plate, wherein the light guide plate is formed of a high refractive index transparent resin and processed on the back surface thereof to form a cell (cell) a diffusion pattern formed such that one side of the light guide plate is a light incident surface, and the light emitting portion is opposite to the light incident surface; whereby the projection wire enters the light guide plate, and the reflection plate is disposed on the back surface of the light guide plate having the diffusion pattern It has a high reflectivity sheet. The light emitted from the light-emitting portion into the light guide plate through the light incident surface is repeatedly reflected and totally reflected between the front surface and the back surface of the light guide plate, and is closed in the direction of the light guide plate toward the light-emitting portion. When the light is transmitted through the light guide plate, when it is projected onto the light guide surface, part of the light is diffused and reflected by the surface of the diffusion pattern (which is emitted as light), and then the light exits the surface to be less than total reflection. The light reflected by the angle of the critical angle will be emitted from the outside of the light guide plate through the light exit surface, and the other part of the light that is not reflected by the diffusion pattern will be reflected back to the inside of the light guide plate by the reflection plate, and will be closed again in the light guide plate. In order to reduce the amount of light loss on the back side of the light guide plate by reflection of the reflection plate. #Because the light emitted from the light exit surface of the light guide plate is emitted from the medium of large refractive index to the medium of small refractive index', the light will be emitted in a direction away from the normal of the light exit surface, if it will be along the light incident surface The direction of the amplitude is defined as the X-axis, and the direction perpendicular to the light incident surface is defined as the x-axis, and the direction perpendicular to the light exit surface is set to 1301920 as the z-axis. The age of the fine Wei touch hard = the effective marriage is about 5. ~1G. It is impossible to visually detect the range of the angle of view (4), so the light that is emitted by the light can not be received by the human eye. In this case, when viewed from the vertical direction of the light exit surface (z-axis direction) ^ ^ 'Visually, the light-emitting luminance of the light-emitting plate is low, and is not conducive to the luminous efficiency of the light-emitting portion. Therefore, the conventional surface light source device is provided with a plurality of light-emitting plates disposed above the light-emitting plate so that the light is emitted from the light-emitting surface. The light is concentrated by the cymbal to the Z-axis direction, thereby improving the brightness of the light obtained by the visual inspection. It can be seen that if the directivity pattern of the light emitted through the light exit surface is closer to the direction perpendicular to the light exit surface (2-axis direction), more light is allowed to enter the effective angle of the human eye, without Depending on the use of the cymbal, that is, the length of the light emitted from the light guide plate in the z-axis direction, thereby improving the luminous efficiency of the light-emitting portion, and reducing the volume of the surface light source device and the manufacturing cost thereof. On the other hand, a conventional surface light source device uses a light-emitting element of a light-emitting portion as a light source, and the light-emitting element generally has two types of a cold cathode tube (CCFL) and a light-emitting diode (LED), wherein an LED is used as a light source. The light-emitting element is provided with a plurality of LEDs to form a plurality of point light sources, and the point light source radiates light radially through the light incident surface, and the light guide plate constitutes a diffusion pattern of the cell, and the Z-axis In the direction of view, the interface of the folded and reflected light is parallel to the light incident surface, so that when the light transmitted in the light guide plate is projected onto the diffusion pattern, only a part of the light is emitted by the diffusion pattern to the 1301920 light exit surface. Diffusion reflection, because there is a light-mixing distance between the LEDs, it is easy to make the gap between the light and dark bands, especially the mirror-patterned light guide plate is more severely separated by the light and dark bands, and the 遂 forms obvious bright lines and dark lines. In addition, it is necessary to diffuse the light emitted from the light guide plate by the diffusion plate, thereby affecting the decrease in the luminance of the light emitted from the light guide plate in the Z-axis direction, and is disadvantageous to the light-emitting efficiency of the light-emitting portion. SUMMARY OF THE INVENTION The main object of the present invention is to provide a high-intensity light guide plate, which is capable of effectively enhancing the brightness of light emitted from a light guide plate in a direction perpendicular to a light exit surface by a first diffusion pattern, thereby improving the surface light source device. The luminous efficiency and the reduction of the volume and manufacturing cost of the surface light source device. Another object of the present invention is to provide a high-intensity light guide plate suitable for use in a face light position having a plurality of point light sources, wherein the light emitted from the light guide plate is more evenly distributed in the light by the first-order button pattern. Shooting the various angles of the surface to avoid bright lines and dark lines. [Embodiment] In order to achieve a more in-depth understanding of the technical features, objects, and effects of the present invention, the specific embodiments of the present invention are described in conjunction with the drawings. The first embodiment of the present invention is more suitable for a surface light source device using a cold cathode tube as a light-emitting element. Please refer to the first and second figures, and the light guide plate (10) is a plate body formed by a high refractive index. One side of the light board (1) is a light incident surface (11), and the surface of the light guide plate (10) is a light exit surface (10), and the light guide plate (10) is a reflective surface (10) and a light shot 1301920 on the opposite side of the light exit surface (10). Parallel to the surface (12), the light guide plate (39) is recessed on the reflecting surface (13) to form a diffusion pattern, and the groove chamber (14) is arranged in a plurality of straight lines parallel to the light incident surface (11). Upper, and the trough chambers (14) arranged in adjacent columns are mutually wrong 'other' with the distance from the light incident surface (11), the distribution density of the trough chamber (14) is increasing as shown in the third figure, the trough The chamber (14) has an asymmetrical triangular shape in a cross section perpendicular to the light exit surface (12), so that the inclined surface of the groove chamber (14) adjacent to the light incident surface (11) is the first surface (142). The vertical surface away from the light incident surface (11) is the second surface (144). The inclination angle /5 between the first surface (142) and the reflective surface (13) is 45°, and the second surface (144) And anti Τ angle between the surface (13) is 90. , for the formation of high-intensity light guides. As shown in the fourth figure, when the first embodiment is applied to a surface light source device using a cold cathode tube as the light-emitting element (21), the light incident surface (π) is adjacent to the light-emitting element (21) in parallel, and the light-emitting element is accordingly (21) projecting parallel light into the light guide plate (10) through the light incident surface (u), and the reflective plate (22) is attached to the reflective surface (13) to reflect light into the light guide plate (1〇), and Light-emitting element (21) The light P incident on the light guide plate (10) is repeatedly reflected on the light exit surface (12) and the reflection surface (13) of the light guide plate (1) while being in the light guide plate (1〇) Advancing away from the direction of the light-emitting element (21). When the light P advances toward the reflecting surface (13) and encounters the chamber (14), the angle between the light p and the normal of the first surface (142) is less than 42·15. The light P will enter the chamber (14) through the first surface (142), and the light trajectory at this time can be summarized as the following three modes of travel. · Please refer to the fifth figure and the following formula, when 6>2<42 · 15. Then, the light P penetrates the first surface (142) into the chamber (14), at this time: 1301920 Θ b - θ \2 (Formula 1-1) 06+ 6*7= 04 (Formula 1-2) θι = Θ% (Formula 1-3) Α+θ8=9Ο° — 04 (Formula 1-4) (Equation 1-5) sin 0 AIR X nAIR=Sin ^ PMMA X ΠρΜΜΑ
當04=45°時 將Θΐ2代入式1 -1 將Θ 5代入式1-5 將06代入式1 -2 將0 7代入式1-3 將08代入式1-4 將<9 9代入式1 -5 〇〇<012<45〇 〇〇<05<45〇 0°<6>6<28. 33° 16. 67°<07<45° 16.67。<08<45。 〇°<09<28. 33° 0°<^1〇<45° 由於〇°<01()<45°，故光線Ρ會折射出導光板(10)。 2.請參閱第六圖及下式，當Α<42.15°，則光線Ρ穿透第 一面（142)進入槽室（14)内，此時： θ ^ Θ 7=90 —Θ 4 (式 2-1)Substituting Θΐ2 into Equation 1 -1 when 04=45° Substituting Θ5 into Equation 1-5 Substituting 06 into Equation 1 -2 Substituting 0 7 into Equation 1-3 Substituting 08 into Equation 1-4 Substituting <9 9 1 - 5 〇〇 < 012 < 45 〇〇〇 < 05 < 45 〇 0 ° < 6 > 6 < 28 ° 33 ° 16. 67 ° < 07 < 45 ° 16.67. <08<45. 〇°<09<28. 33° 0°<^1〇<45° Since 〇° <01() < 45°, the light ray refracts the light guide plate (10). 2. Please refer to the sixth figure and the following formula. When Α<42.15°, the light ray penetrates the first surface (142) into the chamber (14). At this time: θ ^ Θ 7=90 —Θ 4 ( 2-1)
07=6*8 (式 2-2) 90 —^8+ ^ 9 = 90 —Θ4 (式 2-3) sin0AiR X nAiR=sin0PMMA X npMM (式 2-4) 0〇<6>5<90〇 0〇<^5<45〇 〇〇<06<28.3〇 16. 67〇<07<45 當04=45°時 為符合光軌跡的實際方向 將Θ 5代入式2-4 將仏代入式2-1 16. 67° < K42.15°光線P會繼續折射傳導 9 1301920 42.15。< 07<45°光線P會全反射 將 <97代入式 2-2 及式 2-3 —2· 85。< 09<〇。 將(99代入式 2-4 -4· 25。< 01()<〇。 由於-4· 25° < 6>1。<0°，故光線P會折射出導光板(1〇)。 3·請參閱第七圖及下式，當仏<42.15。，則光線p穿透第 一面（142)進入槽室（14)内，此時： 0 6 + 90° — Θ 1= Θ 4 (式 3-1) θ ί= Θ % (式 3-2)07=6*8 (Equation 2-2) 90 —^8+ ^ 9 = 90 —Θ4 (Equation 2-3) sin0AiR X nAiR=sin0PMMA X npMM (Equation 2-4) 0〇<6>5<90 〇0〇<^5<45〇〇〇<06<28.3〇16.67〇<07<45 When 04=45°, the actual direction corresponding to the light path will be substituted for Θ 5 into 2-4. Substituting 2-1 16. 67° < K42.15° light P will continue to refract conduction 9 1301920 42.15. < 07 < 45 ° light P will be totally reflected. Substitute <97 into Equation 2-2 and Equation 2-3 - 2·85. <09<〇. (99 is substituted into the formula 2-4 -4·25. <01()<〇. Since -4·25° <6>1.< 0°, the light P is refracted by the light guide plate (1〇 3. Please refer to the seventh figure and the following formula. When 仏<42.15, the light p penetrates the first surface (142) into the chamber (14), at this time: 0 6 + 90° — Θ 1 = Θ 4 (Equation 3-1) θ ί= Θ % (Equation 3-2)
09+90 —08=90°—04 (式 3-3) (式 3-4)09+90 —08=90°—04 (Equation 3-3) (Equation 3-4)
S i η Θ AIR X IlAIR = s i η θ ΡΜΜΑ X IlPMMA 當04=45 時 〇°<05<9〇。 為符合光轨跡的實際方向 〇°< θ5<45。 將代入式3-4 〇°<^6<28.33° 將06代入式 3-1 45。<07<73 33。 將 Θ 7 代入式 3-2 及 3-3 〇。< 0 9 < 28· 33。S i η Θ AIR X IlAIR = s i η θ ΡΜΜΑ X IlPMMA When 04=45 〇° <05<9〇. In order to conform to the actual direction of the light trajectory 〇 ° < θ5 < 45. Substituting 3-4 〇 ° <^6<28.33° will be substituted into 3-1 45. <07<73 33. Substituting Θ 7 into Equations 3-2 and 3-3. < 0 9 < 28·33.
將 9代入式 3-4 〇。< θι〇<45。 由於〇。<01°<45。，故光線Ρ會折射出導光板(10)。 據此’當光線ρ遇到行進路徑上的第一個槽室（14)的 第一面（142)時，即折射通過第一面（142)進入該槽室（14) 内向第二面（144)行進，而後折射通過第二面（144)後，光 線Ρ的行進方向藉由第一個槽室（14)折射改變為較為平缓 的方向，再據此遇到次一個槽室（14)的第一面（142)時，由 於光線Ρ與該第一面（142)的法線之間的夾角為16· 67。 <0?<73·33。，故可藉次一個槽室（14)的第一面（142)向光 I3〇i92〇 、 射出面（12)全反射，並以趨近於垂直光射出面（12)的方向 折射出光射出面（12) ’俾供提高射出導光板的光線在垂直 於光射出面方向上的輝度者。 由前所述可知，本發明藉由槽室（14)及擴散圖案之構 • 成，使得射出光射出面（12)的光執跡，係集中在與光射出 , 面（12)垂直的方向至45。角之間，面光源裝置不需要加裝 稜鏡片，即可提高面光源裝置中，發光元件的發光效率， 進而降低面光源裝置的體積及其製造成本者。 拳本發明第二實施例係較適用於配設多個LED點光源之 面光源裝置者，請參閱第八至十圖，導光板(30)一側面為 光射入面（31)，且導光板(30)表面為光射出面（32)，導光 板(30)於光射出面（32)相對之背面為反射面（33)與光射出 面（32)平行，導光板(3〇)於反射面（33)凹陷複數個槽室 (34)形成擴散圖案，槽室（34)係排列在與光射入面（31)平 行的複數列直線上，且配置於相鄰列的槽室（34)彼此相錯 ，另外’隨著遠離光射入面（31)，槽室（34)的分佈密度漸 春 增，令槽室（34)鄰向光射入面(31)為第一面（342)，遠 離光射入面（31)侧為第二面（344)，第一、二面（342) (344)在平行於光射出面（32)方向的斷面係呈彼此對稱的 弧形曲面，若於第一面（342)中軸與兩端平行於光射出面分 別虛擬劃出兩條連接線Li、L2，令Li與L2之間的夾角為 δ ’則δ角係與點光源通過光射入面輻射狀投射光線進入 導光板(30)内部時，入光執跡分佈的扇形角度相同，如第 十一圖所示，槽室（34)在垂直於光射出面（32)方向的斷面 11 1301920 係呈對稱的三角形，且第一面（342)與反射面（33)間的 傾斜角A為45。，第二面（344)與反射面（33)間的夾角T 為45°，俾供構成高輝度導光板者。 如第十二圖所示，第二實施例應用於具有多個LED點 光源(41)之面光源裝置者，光射入面（31)與點光源（41)相 鄰’據使點光源(41)得以通過光射入面（31)輻射狀投射光 線進入導光板(30)，此時，由於第一、二面（342)(344)在 平行於光射出面（32)方向的斷面係呈彼此對稱的弧形曲面 之構成，在導光板内傳輸之光線投射至槽室（34)時，一部 份的光線遇到第一面（342)而向光射出面（32)反射，另一 部份的光線則通過第一面（342)折射進入槽室（34)内 ，並在通過第二面（344)後向光射出面（32)折射，本創作 第二實施例槽室（34)之構成，是為解決多個le：d點光源 之間的亮暗紋產生問題。因為點光源與CCFL線光源不 同，線光源裝置其光執跡會朝直線γ方向前進，當光執跡 與槽至作用時，其出光方向，會—致性的朝γ方向折射出 導光板’但LED為點光源裝置，其絲跡在導光板裡行進 方向成幸田射狀政出，如果以第一實施例作搭配，會造成明 暗帶相間。如何改善明暗帶相間，必須修改其槽室結構， 使光執跡在每一個方向的分布可以均一。如第十三圖所示 第-實知例中，當導光板有入光結構搭配時，光^過光 射入面進人導光板後會呈聽射狀的光執跡分佈，則平順 曲面的第-面（342)與光執跡角度成相同的趨勢，使得每、 一個角度的光執跡都有機會垂直於第一面（342)激出或 1301920 肖勻的分散各個角度，槽室（34)在每—個方向都可以與光 軌跡均勻的產生作用，即可將大部份的光線向光射出面 (32)擴散反射，在這種狀態下，從光射出面（32)之垂直方 向（z軸方向）觀看時，目視所得分布於光射出面（32)的光 • 線輝度趨於平均，而不致形成_的亮線、暗紋者。 ^ 本發明第三實施例亦係較適用於配設多個LED點光源 之面光源裝置者，且第三實施例係前述第一 、二實施例合 併變化而得者，相同部份遂不重複說明，請參閱第十三圖 験至第十五圖，槽室（54)在垂直於光射出面（52)方向的斷面 係呈非對稱的三角形狀，令槽室（54)鄰向光射入面（51)側 之斜面為第一面（542)，遠離光射入面（51)侧之垂面則為 第二面（544)，第一面（542)與反射面（53)間的傾斜角冷為 45 ’第二面（544)為一平面且其與反射面（53)間的夾角^ 為90° ’第一面（542)在平行於光射出面（52)方向的斷面係 呈弧形曲面，俾供構成高輝度導光板者。 據此’當光線遇到行進路徑上的第一個槽室（54)的第 一面（542)時，即折射通過第一面（542)進入該槽室（54)内 向第二面（544)行進，而後折射通過第二面（544)後，光線 • 的行進方向藉由第一個槽室（54)折射改變為較為平緩的方 向’再據此遇到次一個槽室（54)的第一面（542)時，藉次 一個槽室（54)的第一面（542)向光射出面（52)全反射 ’並以趨近於垂直光射出面（52)的方向折射出光射出面 (52) ’俾供提高射出導光板的光線在垂直於光射出面方向 上的輝度者。 13 1301920 综前所述’本發明藉由創新的構成，確能充份滿足預 期目的’憎前亦未見於公開’誠符合發明專利之要件， 爰依法提出申請，尚祈詳加細審，並早日准予專利為禱。 【圖式簡單說明】 * 第-圖係本發明第-實施例之平面示意圖，藉以表示形成 於導光板背面之擴散圖案。 弟一圖係本發明第一實施例之剖面示意圖。 第三圖係第二圖於槽室部份的局部放大視圖。 第四圖係本發明第-實施例應用於面光源裝置之示意圖。 第五圖係本發明第一實施例第一種光軌跡示意圖。〜 第六圖係本發明第一實施例第二種光執跡示意圖。 第七圖係本發明第一實施例第三種光軌跡示意圖。 第八圖係本發明第二實施例之平面示意圖，藉以表示形成 於導光板背面之擴散圖案。 第十圖係本發明第二實施例之剖面示意圖。 第十一圖係第十圖於光擴散圖案部份的局部放大視圖。 第十二圖係本發明第二實施例應用於面光源裝置之示意圖 Ο 第十三圖係本發明第二實施例使用狀態下，槽室與入光軌 跡之相對狀態示意圖。 〃 第十四圖係本發明第三實施例之局部平面示意圖，藉以表 示形成於導光板背面之擴散圖案。 第十五圖係第十四圖於槽室部份的局部放大視圖。 第十六圖係本發明第三實施例於槽室部份的局部放大剖視 圖。 。 14 1301920 【主要元件符號說明】 導光板(10) 光射入面（11) 光射出面（12) 反射面（13) 槽室（14) 第一面（142) 第二面（144) 發光元件（21) 反射板(22) 導光板(30) 光射入面（31) 光射出面（32) 反射面（33) 槽室（34) 第一面（342) 第二面（344) 點光源(41) 光射出面（52) 反射面（53) 槽室（54) 第一面（542) 第二面（544)Substitute 9 into 3-4 〇. <θι〇<45. Because of this. <01 ° < 45. Therefore, the light ray will reflect the light guide plate (10). According to this, when the light ρ encounters the first surface (142) of the first groove chamber (14) on the traveling path, the refracting enters the inner surface of the groove chamber (14) through the first surface (142) to the second surface ( 144) After traveling, and then refracting through the second surface (144), the traveling direction of the ray ray is changed to a relatively gentle direction by the refraction of the first groove chamber (14), and then the next chamber (14) is encountered. The first face (142) has an angle of 16.67 due to the angle between the pupil and the normal of the first face (142). <0?<73·33. Therefore, the first surface (142) of one of the tank chambers (14) can be totally reflected toward the light I3〇i92〇 and the exit surface (12), and the light is emitted in a direction approaching the vertical light exit surface (12). The surface (12) '俾 is used to increase the brightness of the light exiting the light guide plate in a direction perpendicular to the light exit surface. As can be seen from the foregoing, the present invention allows the light exiting the light exit surface (12) to be concentrated in a direction perpendicular to the light exiting surface (12) by the configuration of the groove chamber (14) and the diffusion pattern. To 45. Between the corners, the surface light source device does not require the addition of a cymbal, and the luminous efficiency of the light-emitting element in the surface light source device can be improved, and the volume of the surface light source device and the manufacturing cost thereof can be reduced. The second embodiment of the invention is more suitable for a surface light source device equipped with a plurality of LED point light sources. Please refer to the eighth to tenth views, one side of the light guide plate (30) is a light incident surface (31), and the guide The surface of the light plate (30) is a light exit surface (32), and the light guide plate (30) is parallel to the light exit surface (32) on the back side of the reflective surface (33) and the light exit surface (32), and the light guide plate (3) is The reflecting surface (33) is recessed by a plurality of groove chambers (34) to form a diffusion pattern, and the groove chambers (34) are arranged on a plurality of linear lines parallel to the light incident surface (31), and are disposed in the groove chambers of the adjacent columns ( 34) mutually wrong, and 'as the distance from the light incident surface (31), the distribution density of the chamber (34) gradually increases, so that the groove chamber (34) is adjacent to the light incident surface (31) as the first surface. (342), the side away from the light incident surface (31) is the second surface (344), and the first and second surfaces (342) (344) are symmetrical to each other in a section parallel to the light exit surface (32). The curved surface, if the axis and the two ends of the first surface (342) are parallel to the light exit surface, respectively, two connecting lines Li, L2 are virtually drawn, so that the angle between Li and L2 is δ ', then the δ angle system and the point Light source through the light incident surface When the projecting light enters the inside of the light guide plate (30), the fan-shaped angle of the light-introducing trace distribution is the same. As shown in FIG. 11, the groove chamber (34) has a section 11 perpendicular to the light-emitting surface (32). 1301920 is a symmetrical triangle, and the inclination angle A between the first surface (342) and the reflection surface (33) is 45. The angle T between the second surface (344) and the reflecting surface (33) is 45°, and is used to form a high-luminance light guide plate. As shown in Fig. 12, the second embodiment is applied to a surface light source device having a plurality of LED point light sources (41), and the light incident surface (31) is adjacent to the point light source (41). 41) being able to project light into the light guide plate (30) through the light incident surface (31), at this time, since the first and second faces (342) (344) are in a direction parallel to the light exit surface (32) A curved surface that is symmetrical to each other. When light transmitted through the light guide plate is projected to the chamber (34), a portion of the light encounters the first surface (342) and is reflected toward the light exit surface (32). The other part of the light is refracted into the chamber (34) through the first surface (342) and refracted toward the light exit surface (32) after passing through the second surface (344). The composition of (34) is to solve the problem of bright and dark lines between a plurality of light-d point light sources. Because the point source is different from the CCFL line source, the line source device will advance its light track in the direction of the line γ. When the light is tracked and the groove is applied, its light exit direction will refract the light guide plate toward the γ direction. However, the LED is a point light source device, and the traveling direction of the trace in the light guide plate is released by Koda, and if it is matched with the first embodiment, the light and dark bands are caused. How to improve the light and dark band phase, you must modify the structure of the cell, so that the distribution of light in each direction can be uniform. As shown in the thirteenth embodiment, when the light guide plate has a light-incorporating structure, the light-emitting surface enters the light guide plate and then has an illuminating light-wound distribution, and the smooth surface is smooth. The first face (342) has the same tendency as the light strike angle, so that each and every angle of the light trace has a chance to be perpendicular to the first face (342) or 1301920 to evenly spread the various angles, the slot chamber (34) In each direction, the light trajectory can be uniformly generated, and most of the light can be diffused and reflected toward the light exit surface (32). In this state, the light exit surface (32) When viewed in the vertical direction (z-axis direction), the brightness of the light lines distributed visually on the light exit surface (32) tends to be averaged, and the bright lines and dark lines of _ are not formed. The third embodiment of the present invention is also suitable for a surface light source device equipped with a plurality of LED point light sources, and the third embodiment is a combination of the foregoing first and second embodiments, and the same portion is not repeated. For the description, referring to the thirteenth to fifteenth drawings, the groove chamber (54) has an asymmetrical triangular shape in a section perpendicular to the light exit surface (52), so that the groove chamber (54) is adjacent to the light. The inclined surface on the side of the incident surface (51) is the first surface (542), and the vertical surface on the side far from the light incident surface (51) is the second surface (544), and the first surface (542) and the reflecting surface (53) The inclination angle between the cold is 45'. The second surface (544) is a plane and the angle between the second surface (544) and the reflection surface (53) is 90°. The first surface (542) is parallel to the light exit surface (52). The section is curved and curved to provide a high-intensity light guide. According to this, when the light encounters the first face (542) of the first groove chamber (54) on the travel path, the refraction passes through the first face (542) into the groove chamber (54) to the second face (544). After traveling, and then refracting through the second face (544), the direction of travel of the light ray is changed to a more gradual direction by the refraction of the first groove chamber (54), and then the next groove chamber (54) is encountered accordingly. In the first face (542), the first face (542) of one of the slot chambers (54) is totally reflected toward the light exit surface (52) and refracts light in a direction approaching the vertical light exit surface (52). Face (52) '俾 is used to increase the brightness of the light exiting the light guide plate in a direction perpendicular to the light exit surface. 13 1301920 Before the above, the invention can be fully satisfied by the composition of the innovation. As soon as the patent is granted, it is a prayer. BRIEF DESCRIPTION OF THE DRAWINGS * The first drawing is a plan view of a first embodiment of the present invention, thereby showing a diffusion pattern formed on the back surface of the light guide plate. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view showing a first embodiment of the present invention. The third figure is a partial enlarged view of the second part in the chamber portion. The fourth drawing is a schematic view of a first embodiment of the present invention applied to a surface light source device. The fifth figure is a schematic diagram of a first optical trajectory of the first embodiment of the present invention. The sixth figure is a second light trace diagram of the first embodiment of the present invention. The seventh figure is a third optical trajectory diagram of the first embodiment of the present invention. Figure 8 is a plan view showing a second embodiment of the present invention, showing a diffusion pattern formed on the back surface of the light guide plate. Figure 11 is a schematic cross-sectional view showing a second embodiment of the present invention. Figure 11 is a partially enlarged view of a portion of the light diffusing pattern of the tenth figure. Fig. 12 is a view showing a second embodiment of the present invention applied to a surface light source device. Fig. 13 is a view showing a state in which a groove chamber and a light entrance track are in a state of use in the second embodiment of the present invention. Figure 14 is a partial plan view showing a third embodiment of the present invention, thereby showing a diffusion pattern formed on the back surface of the light guide plate. The fifteenth diagram is a partially enlarged view of the fourteenth portion of the chamber. Fig. 16 is a partially enlarged cross-sectional view showing a portion of the chamber in the third embodiment of the present invention. . 14 1301920 [Description of main component symbols] Light guide plate (10) Light incident surface (11) Light exit surface (12) Reflecting surface (13) Groove chamber (14) First side (142) Second side (144) Light-emitting element (21) Reflector (22) Light guide plate (30) Light incident surface (31) Light exit surface (32) Reflecting surface (33) Groove chamber (34) First side (342) Second side (344) Point source (41) Light exit surface (52) Reflecting surface (53) Groove chamber (54) First side (542) Second side (544)
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