1307791 曰嗲(史)正替換f ，丨丨月>， 九、發明說明： 一"*-— 【發明所屬之技術領域】 本發明係有關一種背光模組之導光板的技術領域，尤 指一種於導光板之第一導光結構與輔助導光結構相互並列 設置於底面或頂面上，以提高導光板之光利用率的結構。 【先前技術】 按’現有之導光板均會在其底面或頂面設置散射型結 ^構或反射型結構’使光線入射結構後被散射或反射而由頂 面出射，而導光板設置結構的一面除了結構部份以外均為 • 平滑面，以使光線射至平滑面後被導向遠離光源之導光板 - 後端’以提升導光板之光線均勻度。 如第1 1圖所示’習知具散射型結構之底面8係以蝕 刻方式於導光板9上形成不規則之粗糙面8 1，使來自光 源之光線A進入導光板後形成散射，讓部份散射之出射光 • 線a 1、a 2由頂面9 1出射。 但是，導光板9之底面8上除了設置結構以外均為平 滑面8 2，而平滑面8 2將會使以較大入射角之光線A 一 以同樣較大之反射角反射’而此種角度之光線不易形成出 射光，而於頂面9 1反射形成反射光B，故可將光線A > λ 導引至導光板後端；然而此種結構之導光板雖有助於將光 線導向導光板後端，但由於底面8之平滑面8 2所反射之 光線同樣會有與頂面9 1之垂直方向的夾角θ 1較大的現 5 1307791 象，此一角度之光線於到達結構之粗糙面8 1後，被粗糙 面8 1散射，散射光中只有部分光線可形成出射光線a 1 、a 2，由頂面9 1出射，此種導光板之光線利用率明顯 不足。 具有反射型結構之導光板，同樣有導光板設置結構的 一面除了結構部份以外均為平滑面之結構特性，因此同樣 有光線利用率明顯不足的問題，而有加以改進之必要。 ^ 【發明内容】 本發明之主要目的，在於解決上述的問題而提供一種 - 具輔助導光結構之導光板，藉由複數辅助導光結構與複數 - 第一導光結構並列設置於導光板之底面及頂面上，以導引 光線趨近於正向光，以增加光線使用率，並以提高使用於 顯示器時之背光亮度。 為達前述目的，本發明之一種具辅助導光結構之導光 - 板，該導光板係具有一入光面、一頂面及一底面，該頂面 及該底面係分別位於該入光面之相對二側，而該頂面與底 面至少其中之一具有一被定義為基準之參考平面及下列結 構： 複數輔助導光結構，該些輔助導光結構係分別具有一 受光面，該些受光面切線與該參考平面之夾角小於4 0度1307791 曰嗲(史) is replacing f,丨丨月>, 九, invention description: 一"*-- [Technical field of invention] The present invention relates to a technical field of a light guide plate of a backlight module, Refers to a structure in which the first light guiding structure and the auxiliary light guiding structure of the light guide plate are juxtaposed on the bottom surface or the top surface to improve the light utilization efficiency of the light guide plate. [Prior Art] According to the 'existing light guide plate, a scattering type structure or a reflection type structure is disposed on the bottom surface or the top surface of the light guide plate, so that the light is incident on the structure and then scattered or reflected to be emitted from the top surface, and the light guide plate is arranged. On the one hand, except for the structural part, it is a smooth surface, so that the light is directed to the smooth surface and then guided away from the light guide plate of the light source - the rear end to enhance the light uniformity of the light guide plate. As shown in FIG. 1 'the bottom surface 8 of the scattering structure is formed on the light guide plate 9 by etching to form an irregular rough surface 81, so that the light A from the light source enters the light guide plate to form a scattering, and the portion is formed. The scattered light exits • The lines a 1 and a 2 are emitted from the top surface 91. However, the bottom surface 8 of the light guide plate 9 is a smooth surface 8 2 except for the structure, and the smooth surface 8 2 will cause the light A with a large incident angle to reflect at the same large reflection angle. The light is not easy to form the emitted light, and the reflected light B is reflected on the top surface 91, so that the light A > λ can be guided to the rear end of the light guide plate; however, the light guide plate of this structure helps guide the light. The rear end of the light plate, but the light reflected by the smooth surface 82 of the bottom surface 8 also has a larger image of the angle 5 1 271 1 which is larger than the vertical direction of the top surface 9 1 , and the light of this angle reaches the roughness of the structure. After the surface 81, it is scattered by the rough surface 81, and only part of the scattered light can form the outgoing light a1, a2, which is emitted from the top surface 91, and the light utilization efficiency of the light guide plate is obviously insufficient. The light guide plate having the reflective structure also has a structural characteristic of a smooth surface except for the structural portion of the light guide plate. Therefore, there is also a problem that the light utilization efficiency is obviously insufficient, and there is a need for improvement. SUMMARY OF THE INVENTION The main object of the present invention is to solve the above problems and provide a light guide plate having an auxiliary light guiding structure, which is disposed in parallel with the plurality of first light guiding structures and the plurality of first light guiding structures. The bottom surface and the top surface guide the light toward the forward light to increase the light usage rate and to improve the backlight brightness when used in the display. In order to achieve the above objective, a light guiding plate having an auxiliary light guiding structure, the light guiding plate has a light incident surface, a top surface and a bottom surface, wherein the top surface and the bottom surface are respectively located on the light incident surface The two sides of the top surface and the bottom surface have a reference plane defined as a reference and the following structures: a plurality of auxiliary light guiding structures, each of which has a light receiving surface, and the light receiving surfaces The angle between the face tangent and the reference plane is less than 40 degrees
1307791 _ 本發明之上述及其他目的與優點，不難從下述所選用 .實施例之詳細說明與附圖t，獲得深入瞭解。 當然’本發明在某些另件上，或另件之安排上容許有 所不同，但所選用之實施例，則於本說明書中，予以詳细 Φ 說明，並於附囷中展示其構造。 【實施方式】 明翏閱第1圖與第3圖’圖中所示者為本發明所選用 ::例結構，此僅供說明之用，在專利申請上並不受此 種結構之限制。 發光板之辅助導光結制可設置於底面或頂1307791 _ The above and other objects and advantages of the present invention are readily apparent from the following detailed description of the embodiments and the accompanying drawings. Of course, the invention may be different on some of the components, or the arrangement of the components, but the selected embodiment is described in detail in the specification, and its construction is shown in the attached. [Embodiment] The first and third figures of the drawings are shown in the drawings. The structure of the invention is selected and used for illustrative purposes only, and is not limited by such a structure. Auxiliary light guiding of the illuminating plate can be set on the bottom or top
I發Θ之第—實施例係將辅助導光結構設於底面 ，而第一實施例之結構詳述如下： 入本本發明第—實施例之導光板1係具有-人光面2，於 底面I 2之相對二側分別為一頂面3及-底面4，其中該 結構::有-被定義為基準之參考平面P，且該底面4之 妹Μ ^數辅助導光結構41，於本實㈣巾該些輔助導光 ~ 1之排財向係垂直於該導光板1之光線入射方向 7 1307791 . 作％ 5日域师換q τ (亦平行於該人光面2 光結構4 1分別具有-受光面4丄丄，而本實施例之受光 面4 1 1係主圓弧凹面柱結構之形態，且該些輔助導光結 構4 1之斷面圓弧切線L與該參考平面p之爽角α小於^ 0度； » 複數第-導光結構4 2，其係與該些辅助導光結構4 1交錯散佈該底面4，而該些第—導光結構4 2之表面至 參少為粗糖面、V形溝槽、弧形溝槽、角錐結構、角柱結構 、圓錐結構或圓柱結構之其中一種形態，而本實施例中該 些第-導光結構4 2係以關方式形成粗M面之網點形態 ，俾由該些輔助導光結構4 1與第一導光結構4 2共同作 用將光線導向出射該導光板1。 請參閱第3圖，當入射光線C入射於該第一導光結構 42時，光線會散射而只有部份形成出射光線C1 (其角 _ 度與導光板頂面垂直方向之夾角較小）出射導光板丄，其 餘的散射光線C2、C3因與導光板頂面垂直方向之夾角 較大，則會繼續在導光板1中傳遞；當光線C 2反射至該 辅助導光結構41時，由於該輔助導光結構41之切線L .與導光板1間具有夾角α，因此被該辅助導光結構4丄反 .射之反射光C 2 -與導光板1之垂直方向之夾角0 2 小（與先前技術之Θ 1相較），使得反射光c 2 /再射至另 8 1307791 ---------The first embodiment of the present invention provides an auxiliary light guiding structure on the bottom surface, and the structure of the first embodiment is described in detail as follows: The light guide plate 1 of the first embodiment of the present invention has a human light surface 2 on the bottom surface. The opposite sides of I 2 are a top surface 3 and a bottom surface 4, respectively, wherein the structure: has - is defined as the reference plane P of the reference, and the sister of the bottom surface 4 is the auxiliary light guiding structure 41, Real (4) towel, the auxiliary light guide ~ 1 row of the fiscal direction is perpendicular to the light incident direction of the light guide plate 1 7 1307791. For the 5th day domain division for q τ (also parallel to the person's smooth surface 2 light structure 4 1 Each has a light-receiving surface 4丄丄, and the light-receiving surface 41 1 of the embodiment is in the form of a main circular concave-concave column structure, and the cross-sectional arc tangent L of the auxiliary light-guiding structure 41 and the reference plane p The refreshing angle α is less than 0 degrees; the plurality of first light guiding structures 42 are interlaced with the auxiliary light guiding structures 41 to spread the bottom surface 4, and the surfaces of the first light guiding structures 42 are Less than one of a coarse sugar surface, a V-shaped groove, an arc groove, a pyramid structure, a corner column structure, a conical structure or a cylindrical structure, and this embodiment The first light guiding structure 42 forms a dot pattern of a thick M surface in an off manner, and the auxiliary light guiding structure 41 interacts with the first light guiding structure 42 to direct light to and exit the light guiding plate 1. Referring to FIG. 3, when the incident light C is incident on the first light guiding structure 42, the light is scattered and only part of the outgoing light C1 is formed (the angle between the angle and the vertical direction of the top surface of the light guide plate is smaller). After the light plate 丄, the remaining scattered light C2, C3 is further transmitted in the light guide plate 1 due to the larger angle between the vertical direction of the top surface of the light guide plate; when the light C 2 is reflected to the auxiliary light guide structure 41, due to the auxiliary The tangent line L of the light guiding structure 41 has an angle α with the light guiding plate 1, so that the angle G 2 of the reflected light C 2 - which is reflected by the auxiliary light guiding structure 4 is smaller than the vertical direction of the light guiding plate 1 (with the previous The trick of technology is 1 compared), so that the reflected light c 2 / re-shot to another 8 1307791 ---------
' 十？^丨丨月5 t)疹(t)正替換I 一第一導光結構4 2後所產生之散射光線出射導光板之機 率增加’換言之，本發明之導光板的光線利用率被提升了 。當然’本發明亦可藉由調整輔助導光結構41之受光面 . 4 1 1切線與參考平面p之夾角α角度來控制反射光〇2 . 之方向，以第4圖為例，該夾角α小於2 0度時，反射 光C 2 /較不趨近於正向光方向（則垂直方向之夾角0 2 較大）’故易於頂面3形成反射，而可將光線導引至導光板 鲁 1之後端；而夾角α大於2 0度，且小於4 0度時，反射 光C 2 >較趨近於正向光方向，故易由頂面3射出，而增 加導光板1之亮度。 請參閱第1 2圖，其係以模擬軟體Tracepro對本發明 以及先前技術中所述之導光板進行模擬所得之導光板尾端 發光分佈圖，模擬條件如下： a·光源發光分佈設定分別為與光源發光面垂直方向爽〇 〜2 0度以及2 0〜40度。 b .光偵測面設在距導光板尾端0. 01 mm處，光偵測面的垂 直方向與導光板尾端發光面垂直方向平行。 c ·光跡數量200, 000條。 d ·方位角0度方向為與導光板發光面垂直之方向，傾角 0度方向為與光源發光面垂直之方向。 由第1 2圖可看出，本發明之導光板之發光分佈與傳 1307791 統導光板相比，原本剌 ^ . Λ 270度的光分佈向方 位角0、180度方向偏蒋， 亦Ρ與導光板發光面垂直方向之 夾角較小的光數量較多。 ^ 因此’可出射導光板的光數量也 隨之增加。 ' 右將該辅助導光結構設置成平行且垂直地交錯 於該=光板1之光線人射方向，如第4圖所示，本發明之 第一實把例同樣可以達到與前述實施例相同之功效。又， ♦該些輔助導光結構之排列方向亦可以該導光板之光源為中 心作放射狀排列，同樣可達相同效果。 *料，請參閱第5圖所示，本發明之第三實施例係於 導光板5之頂面6上形成該複數輔助導光結構6丄及該複 數第-導光結構6 2，而該底面7則具有傳統結構形態之 第二導光結構7 1 (本實施例以ν形溝槽為例，其亦可為 第5 Α圊之粗糙面形態、第5 Β圖之多數弧凹面形態、第 ’ 5 C圖之角錐形態、第5 D圖之角柱形態、第5 Ε圖之圓 .錐形態及第5 F圖之圓柱形態），其中該輔助導光結構6 1 與該第一導光結構6 2將有助於該頂面6將光線導引至與 頂面6垂直方向夾角較小的方向，並配合底面7之第二導 * 光結構71 ’得以使光線導向與頂面6垂直方向夾角較小 . 的方向，以增加光線之使用率。 再者，本發明之辅助導光結構，除了前述實施例中所 1307791 η — 採取1域卿態 所外弧形柱趙結構（如第727=二如第6圖 8圖所示）、角柱处構q 角錐、，，。構（如第 1〇圖所= 9圖所示)或圓錐結構(如第 —構二I , 種形態;當採用V形溝槽、角錐& 構或角柱結構之其中一種 用雏、'，口 •am 種L時’該辅助導光結構的受光 面與參考平面p之夾角小於㈣又先 T度本奴所述之各種辅 助導先結構之形態與前述第一實施例中所述 形態均屬等效元件之置換，而可 、，°構 j延判興則述第一實施例相 功效。又，該輔助導光結構之表面亦可選擇採用光滑 面或粗趟面其中—者，均可達提升光_用率之功效。 綜上所述，本發明主要係於導光板丄之其中一面形成 有非平面形態之輔助導光結構4 i，且辅助導光結構4工 與複數第一導光結構4 2交錯散佈於同一面，使輔助導光 紇構所反射之光線與導光板發光面垂直方向間之夾角縮小 ，進而使光線被第一導光結構散射或反射後出射導光板之 機率增加，以達到提升光線利用率之功效。 以上所述實施例之揭示係用以說明本發明，並非用以 限制本發明，故舉凡數值之變更或等效元件之置換仍應隸 11 1307791 丨月<κ，封史)正替換負 屬本發明之範_。 由以上詳細說明，可使熟知本項技藝者明瞭本發明的 確可達成前述目的，實已符合專利法之規定，爰提出專利 . 申請。 . 【圖式簡單說明】 第1圖係本發明之結構示意圖 第2圖係本發明之導光板之仰視立體圖 • 第3圖係本發明之導光板的光線路徑示意圖 第4圖係本發明之第二實施例導光板之仰視立體圖 第5圖係本發明之第三實施例導光板之示意圖 第5Α圖係本發明第三實施例之第二導光結構為粗輪面形 態示意圖 第5B圖係本發明第三實施例之第二導光結構為多數弧凹 面形態示意圖 _ S5C圖係本發明第三實施例之第二導光結構為角錐形態 ， 不意圖 第5〇圖!本發明第三實施例之第二導光結構為角柱形態 示意圖 -第5 E圖係本發明第三實 示意圖 乐一V先結構為圓錐形態 第5 F圖係本發明第三實施例之第 導光、、告構為圓柱形態 12 1307791 —____—一^ . 卿/日修itJ正替换ίί 示意圖 ------—^ 第6圖係本發明之辅助導光結構為V形清槽之示意圖 第7圖係本發明之輔助導光結構為孤形柱體結構之示意圖 第8圖係本發明之輔助導光結構為角錐結構之示意圖 ,第9圖係本發明之輔助導光結構為角柱結構之示意圖 第10圖係本發明之輔助導光結構為圓錐結構之示意圖 第1 1圖係習用之導光板結構示意圖 • 第1 2圖係本發明中，以模擬軟體Tracepro對本發明以及 先前技術中所述之導光板進行模擬所得之導光板 尾端發光分佈圖 【圖號說明】 (習用部分） 底面8 粗糙面8 1 平滑面8 2 鲁導光板9 底面9 1 光線A、光線a > 出射光線a 1、a 2 反射光B - 夾角0 1 . (本發明部分） 導光板1 13 1307791 入光面2 頂面3 底面4 受光面41 1 導光板5 頂面6 第一導光結構6 2 • 底面7 入射光線C 散射光線C 2、C 3 光線入射方向T 夾角α、0 2 參考平面Ρ 辅助導光結構41 弟一導光結構4 2 輔助導光結構61 第二導光結構71 出射光線C1 切線L 反射光C 2 >'Ten? ^丨丨月5 t) The rash (t) is replacing the first light guiding structure 4 2 and the scattering light generated by the first light guiding structure 4 2 is increased in the probability of exiting the light guiding plate. In other words, the light utilization efficiency of the light guiding plate of the present invention is improved. Of course, the present invention can also control the direction of the reflected pupil .2 by adjusting the angle of the angle α between the tangential line and the reference plane p, and the angle of the reflected aperture 〇2 is taken as an example. When it is less than 20 degrees, the reflected light C 2 / is less close to the direction of the forward light (the angle between the vertical direction is larger than 0 2), so that the top surface 3 is easily reflected, and the light can be guided to the light guide plate. When the angle α is greater than 20 degrees and less than 40 degrees, the reflected light C 2 > is closer to the forward light direction, so it is easy to be emitted from the top surface 3, and the brightness of the light guide plate 1 is increased. Please refer to FIG. 1 , which is a schematic diagram of the light-emitting distribution of the light guide plate obtained by simulating the light guide plate of the present invention and the prior art by the simulation software Tracepro. The simulation conditions are as follows: a· The light source distribution is set to be the light source respectively. The vertical direction of the light-emitting surface is cool ~ 2 0 degrees and 2 0 ~ 40 degrees. b. The light detecting surface is located at a distance of 0.01 mm from the tail end of the light guide plate, and the vertical direction of the light detecting surface is parallel to the vertical direction of the light emitting surface at the tail end of the light guide plate. c · The number of light tracks is 200,000. d · The azimuth angle of 0 degree is the direction perpendicular to the light-emitting surface of the light guide plate, and the inclination angle of 0 degree is the direction perpendicular to the light-emitting surface of the light source. It can be seen from Fig. 2 that the light distribution of the light guide plate of the present invention is lower than that of the 1307791 light guide plate, and the light distribution of the original 剌 . 270 degrees is azimuth angle of 0, 180 degrees, which is also The amount of light having a small angle between the light-emitting surface of the light guide plate and the vertical direction is large. ^ Therefore, the amount of light that can exit the light guide plate also increases. 'The right auxiliary light guiding structure is arranged to be parallel and vertically staggered in the direction of the light beam of the light board 1. As shown in FIG. 4, the first embodiment of the present invention can also achieve the same as the previous embodiment. efficacy. Moreover, the arrangement direction of the auxiliary light guiding structures may also be arranged radially in the center of the light source of the light guide plate, and the same effect can be achieved. *Materials, please refer to FIG. 5, the third embodiment of the present invention is formed on the top surface 6 of the light guide plate 5 to form the plurality of auxiliary light guiding structures 6 and the plurality of first light guiding structures 62. The bottom surface 7 has a second light guiding structure 7 1 of a conventional structure. (In this embodiment, the ν-shaped groove is taken as an example, which may also be a rough surface shape of the fifth 、, a majority of the arc concave shape of the fifth 、, The angle of the '5 C picture, the shape of the column of the 5th D, the circle of the 5th figure, the conical state and the cylindrical state of the 5th F), wherein the auxiliary light guiding structure 6 1 and the first light guiding The structure 6 2 will help the top surface 6 guide the light to a direction perpendicular to the vertical direction of the top surface 6, and cooperate with the second light guiding structure 71' of the bottom surface 7 to direct the light to be perpendicular to the top surface 6. The direction of the direction is smaller. The direction is increased to increase the light usage. Furthermore, the auxiliary light guiding structure of the present invention, except for the above-mentioned embodiment, 1307791 η - takes the outer curved column structure of the 1 domain (as shown in Fig. 727 = 2 as shown in Fig. 8), and the corner column Construct q pyramid, ,,. Structure (as shown in Figure 1 = Figure 9) or conical structure (such as the first - structure II, species; when using V-shaped grooves, pyramids / structures or corner columns, one of them, ', When the mouth is the same, the angle between the light-receiving surface of the auxiliary light-guiding structure and the reference plane p is smaller than (4) and the shape of the various auxiliary guiding structures described by the first T-Bennu is the same as that described in the first embodiment. It is a replacement of the equivalent element, and the structure of the first embodiment can be described as a function of the first embodiment. Further, the surface of the auxiliary light guiding structure may also adopt a smooth surface or a rough surface. In view of the above, the present invention mainly forms a non-planar auxiliary light guiding structure 4 i on one side of the light guide plate, and the auxiliary light guiding structure 4 and the first The light guiding structures 4 2 are staggered on the same surface, so that the angle between the light reflected by the auxiliary light guiding structure and the vertical direction of the light emitting surface of the light guide plate is reduced, and then the light is scattered or reflected by the first light guiding structure and then exits the light guiding plate. Increased chances to improve light utilization. The above description of the embodiments is intended to illustrate the invention and is not intended to limit the invention. Therefore, the change of the numerical value or the replacement of the equivalent element should still be replaced by the negative genus of 11 1307791 丨月<κ,封史) The invention is based on the invention. From the above detailed description, those skilled in the art can understand that the present invention can achieve the foregoing objects, and has been in compliance with the provisions of the Patent Law. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a bottom view of a light guide plate of the present invention. FIG. 3 is a perspective view of a light path of a light guide plate of the present invention. FIG. 4 is a view of the present invention. FIG. 5 is a schematic view of a light guide plate according to a third embodiment of the present invention. FIG. 5 is a schematic view showing a second light guide structure according to a third embodiment of the present invention. FIG. The second light guiding structure of the third embodiment of the present invention is a schematic diagram of a majority of the arc concave shape. The second light guiding structure of the third embodiment of the present invention is a pyramidal state, and is not intended to be the fifth drawing. The third embodiment of the present invention The second light guiding structure is a schematic view of the corner column - the fifth embodiment is the third real schematic diagram of the first embodiment of the present invention. The first structure is a conical form. The fifth F picture is the light guide of the third embodiment of the present invention. Cylindrical state 12 1307791 —____—一^. Qing/日修itJ is replacing ίί ------------------ Figure 6 is a schematic diagram of the auxiliary light guiding structure of the present invention as a V-shaped clearing groove. The auxiliary light guiding structure of the invention is a solitary column structure Figure 8 is a schematic view showing the auxiliary light guiding structure of the present invention as a pyramid structure, and Figure 9 is a schematic view showing the auxiliary light guiding structure of the present invention as a corner column structure. Fig. 10 is a schematic view showing the auxiliary light guiding structure of the present invention as a conical structure. Fig. 1 is a schematic view showing the structure of a light guide plate used in the present invention. Fig. 12 is a diagram showing the light emission distribution at the end of the light guide plate obtained by simulating the light guide plate of the present invention and the prior art by the simulation software Tracepro. Description] (customized part) bottom surface 8 rough surface 8 1 smooth surface 8 2 light guide plate 9 bottom surface 9 1 light A, light a > outgoing light a 1 , a 2 reflected light B - angle 0 1 . (part of the present invention) Light guide plate 1 13 1307791 Light-incident surface 2 Top surface 3 Bottom surface 4 Light-receiving surface 41 1 Light guide plate 5 Top surface 6 First light-guiding structure 6 2 • Bottom surface 7 Incident light C Scattering light C 2, C 3 Light incident direction T Angle α 0 2 reference plane 辅助 auxiliary light guiding structure 41 弟-light guiding structure 4 2 auxiliary light guiding structure 61 second light guiding structure 71 outgoing light C1 tangential line L reflected light C 2 >