1356204. 九、發明說明： 【發明所屬之技術領域】 本發明關於一種具有良好擴光效果之入光結構的導光板。 【先前技術】 知·線光源例如冷陰極燈管(cold cathode fluorescent lamp ; CCFL)由 •於體積較大，較不適用於小體積的手持式電子裝置。因此，例如行動電 •話之手持式電子裝置，通常使用點光源作為其液晶顯示器背光模組之側 • 光源。圖1為顯示一習知背光模組100之示意簡圖，如圖1所示，例如 發光二極體l〇4(light-emittingdiode ; LED)之點光源鄰接導光板1〇2之一 入光側面102a，且導光板102之底面l〇2c形成有V型溝槽1〇6所構成之 稜鏡結構。於此一習知設計中，由於點光源的發光角度與能量關係依循 朗伯放射定律(Lambert，s emission law)，當採用發光二極體1〇4作為液晶 顯示器背光模組之侧光源，並搭配稜鏡片（未圖示)將光線導正至導光板 1〇2出光面102b法線方向附近後，如圖2所示，在鄰近入光側面1〇^的 局部區域容易出現對比強烈的亮帶11〇及暗帶112分佈，而明顯降低導 鲁光板102的輝度分佈均勻性。 因此，於習知技術中，一種入光結構設計被提出以改善上述問題， 一例如圖3所示於入光面122上排列多個尺寸相同的三角柱結構物而構成 • V入子結構〗20，或如圖4所示於入光面132上排列多個尺寸相同的 圓柱結構物而構成一 R入子結構n〇，藉以提供光擴散效果以改善導光 板入光處的亮/暗帶差異問題，同時提高點光源的入光效率。然而，習知 V入子結構12〇或尺入子結構13〇的擴光能力有限，即使設置這些入光 構，導光板上分佈對比強烈的亮/暗帶區域面積仍相當大，使整體輝度 刀佈均勻性仍不佳且無法進_步提高導光板有效出光區的面積。 6 1356204. 【發明内容】 且有户好良好擴光效果之入光結構的導光板，該導光板 Γ 倾大_咖出光區域。 光ΓΓΐ 光面⑼。光反射面位於出絲對側以將由入 料邮^。導祕具有—有效妓區及介於有 及點规間之-過渡區，複數人光結構分佈於導光板之過渡 -，且沿實質同-方向排列之每兩相鄰人光結構具有相異的尺寸。 於一實施财，每兩相鄰人光結射絲大尺寸之人光結構沿平行 出光面方向切割之第-截面面積、與具較小尺寸之入光結構沿平行出光 面方向切割之第二截面面積兩者的比值為大於或等於12且小於或等於 35 ’且第-及第二截面為曲面(curyedsurface)或多邊形面(polygonal surface) 〇 藉由此-設計，兩不同尺寸的相鄰入光結構可明顯改變入射光偏折 • 後的行進路徑而提昇光擴散效果，因入光結構可提供良好的光擴散效 果，故可將點光源至有效出光區的距離縮短但仍能維持良好的輝度分佈 w 均勻性，獲得擴大導光板上的有效出光區面積的效果。 • 财發明之另一實施態樣，一種用以接收來自至少-點辆發出之 光線並將其導出之導光板，包含一入光面、一出光面、—光反射面、複 數第一入光結構、及複數第二入光結構，且導光板具有—有效出光區及 介於有效出光區及點光源間之一過渡區。入光面鄰近點光源以接收點光 源發出之光線，且於導光板内部行進之光線係經由出光面導出。光反射 面位於出光面對側以將由入光面進入導光板之光線導向出光面。複數第 7 1356204 一入光結構形成於入光面上且沿實質同一方向排列之每兩相鄰第一入光 結構具有相異的尺寸。複數第二入光結構形成於過渡區内除入光面外之 區域’且沿實質同一方向排列之每兩相鄰第二入光結構具有相異的尺寸。 藉由此一設計’因不同尺寸的入光結構同時分佈於入光面上、及於 過渡區内除入光面外之區域，可進一步提高光擴散效果。 【實施方式】 有關本創作之前述及其他技術内容、特點與功效，於以下配合參考 圖式之實施例的詳細說明中，將可清楚的呈現。以下實施例中所提到的 方向用語，例如：上、下、左、右、前或後等，僅是參考附加圖式的方 向。因此’使用的方向用語是用來說明並非用來限制本創作。 圖5為一示意圖，顯示本發明導光板設計之一實施例。如圖5所示， 導光板12係用以接收至少一點光源發出之光線(圖示為兩個發光二極體 14)並將其導出。導光板12鄰近發光二極體14之側面形成為一入光面 12a，與入光面12a形成一夾角之頂面形成為一出光面nb，且位於出光 面12b對側之底面形成為一光反射面12c。光反射面丨及整個表面上分佈 φ 有V型溝槽20所構成之多個稜鏡結構，且各個v型溝槽2〇之長軸方向 相互平行。發光二極體14發出之光線經由入光面12a進入導光板12内 、部後，光反射面⑸再將於導光板12内部行進之光線導向出光面12b， 最後光線經由出光面12b離開導光板12。 . 依本實施狀設計，人光面仏職有_不同尺寸_圓入光结 構16、18，兩種不同尺寸的橢圓入光結構l6、18以長軸方向彼此平行方 式於^光面12a上交替排列，且其分佈區域至少涵蓋各個發光二極體14 於入光面12a上的概略投影區域。橢圓入光結構16、18遭遇入射光之正 面為部份橢圓柱面16a、18a，且_入光結構16、18之頂面⑽、⑽ 8 1356204. 觸㈣。依本實施例之設計，於每_鄰人光結構中具較大 18之頂^sT結構10之頂面脱面積、與具較小尺寸的麵入光結構 佳面18b面積兩者的比值以設為大於或等於1.2且小於或等於35較 —圖6為—示意圖’顯示本發明導光板設計之另-實施例。如圖6所 丁兩種不同尺寸的入光結構於人光面12a上交替排列其中具較大尺 •寸的入光、，·。構為橢圓入光結構26且具較小尺寸的入光結構為一 V型入光 .結構烈。橢圓入光結構26遭遇入射光之正面為部份擴圓柱面加且其頂 #面挪為一部份橢圓面，V型入光結構28遭遇入射光之正面為角柱面28a 且其頂面28b為-梯形面。依本實施例之設計，於每兩相鄰入光結構中， ，、較大尺寸的橢圓入光結構頂面26b面積、與具較小尺寸的V型入光結 構頂面28b面積兩者的比值以設為大於或等於12且小於或等於％較佳。 "圖7A及7B為示意圖’說明兩相鄰入光結構言史為不㈤尺寸所帶來的 光擴散提昇效果。如圖M之右側所示，路徑M1、M2(虛線)為假設入射 光1卜12遭遇與左側相同尺寸的入光結構孤面恤偏折後的行進路徑， 路徑N卜N2(實線)為實際上入射光n、κ遭遇較小尺寸的入光結構弧面 • 版偏折後的行進路徑。由比較路徑ΜΙ、M2與路徑川、Ν2兩者可明 確看出，兩不同尺寸的相鄰人光結構明顯改變人射光偏折後的行進路徑 -而提昇光擴散效果。另外，如圖7Β所示，入射光η、12遭遇不同尺寸的 •梯形面28a及弧面26a同樣可改變偏折後的行進路徑而提昇光擴散效果。 請再參考圖5，於點光源作為側光源的環境下，導光板12可區分為 一有效出光區EA及一過渡區TA ’過渡區TA鄰近點光源位置而具有對 比強烈之亮/暗帶分佈，無法藉由改變網點的大小及疏密補救而成為一留 白區。於有效出光區EA中，因光線已擴散較為均勻，故可疊合一液晶顯 示面板之有效顯示區(AA區)作為提供面光源之實際作用區域。以18叶 9 1356204, 標準背光模組使用之習知R入子結構為例，當發光二極體至有效出光區 EA距離為4.65mm時，導光板前端亮/暗帶輝度差異值為i92.61cd/m2， 該值可視為可接受的臨界值，若導光板前端的亮/暗帶輝度差異值大於該 臨界值192_61cd/in2時，即為不佳的輝度均勻性。再者，若縮短點光源至 有效出光區EA的距離，會增大導光板前端的亮/暗帶輝度差異值。因此， 藉由交替設置兩種不同尺柏人光結構所提供的良好光舰效果，可將 點光源至有效出純EA的雜驗，且佩、轉良好的職均勻性(亮/1356204. IX. Description of the Invention: [Technical Field] The present invention relates to a light guide plate having a light-incident structure with a good light-enhancing effect. [Prior Art] A known line source such as a cold cathode fluorescent lamp (CCFL) is made of a large-sized, relatively unsuitable for a small-sized hand-held electronic device. Thus, for example, handheld electronic devices for mobile phones typically use a point source as the side of the liquid crystal display backlight module. 1 is a schematic diagram showing a conventional backlight module 100. As shown in FIG. 1, a light source such as a light-emitting diode (LED) is adjacent to the light guide plate 1〇2. The side surface 102a and the bottom surface 10b of the light guide plate 102 are formed with a meandering structure composed of V-shaped grooves 1〇6. In this conventional design, since the angle of illumination of the point source and the energy are in accordance with Lambert's law of emission, when the light-emitting diode 1〇4 is used as the side light source of the backlight module of the liquid crystal display, After the light is guided to the vicinity of the normal direction of the light-emitting surface 102b of the light guide plate 1〇2 with a cymbal (not shown), as shown in FIG. 2, a strong contrast is likely to occur in a local area adjacent to the light-incident side surface 1〇^. The band 11 〇 and the dark band 112 are distributed, and the luminance distribution uniformity of the guide light plate 102 is significantly reduced. Therefore, in the prior art, a light-incident structure design is proposed to improve the above problem. For example, as shown in FIG. 3, a plurality of triangular-column structures of the same size are arranged on the light-incident surface 122 to constitute a V-sub-structure. Or, as shown in FIG. 4, a plurality of cylindrical structures of the same size are arranged on the light-incident surface 132 to form an R-insub-structure n〇, thereby providing a light diffusion effect to improve the difference in light/dark band at the light entrance of the light guide plate. The problem is to increase the light-in efficiency of the point source. However, the conventional V-input structure 12〇 or the sub-structure 13〇 has limited light-expanding ability. Even if these light-incorporating structures are provided, the area of the bright/dark band area where the contrast is strongly distributed on the light guide plate is still quite large, so that the overall luminance is obtained. The uniformity of the knife cloth is still not good and it is impossible to increase the area of the effective light exit area of the light guide plate. 6 1356204. [Draft] The light guide plate of the light-incident structure having a good light-expanding effect, the light-guiding plate 倾 is inclined to the light-emitting area. Glossy Glossy (9). The light reflecting surface is located on the opposite side of the wire to be fed by the material. The guiding secret has an effective 妓 zone and a transition zone between the fulcrum and the point gauge, a plurality of human light structures are distributed in the transition of the light guide plate, and each two adjacent human light structures arranged along the substantially same direction are different. size of. In the implementation of the first, the cross-sectional area of the light structure of each of the two adjacent human light-junction filaments is cut along the parallel light-emitting surface direction, and the second light-cut structure with the smaller size is cut along the parallel light-emitting surface. The ratio of the cross-sectional area is greater than or equal to 12 and less than or equal to 35 ' and the first and second cross-sections are curved surfaces or polygonal surfaces, by which the two adjacent dimensions are adjacent. The light structure can significantly change the traveling path after the incident light is deflected and the light diffusion effect is enhanced. Since the light-increasing structure can provide a good light diffusion effect, the distance from the point light source to the effective light-emitting area can be shortened but still maintained well. The luminance distribution w is uniform, and the effect of enlarging the effective light-emitting area on the light guide plate is obtained. In another embodiment of the invention, a light guide plate for receiving light from at least a point of the vehicle and guiding it out comprises a light entrance surface, a light exit surface, a light reflection surface, and a plurality of first light entrances. The structure and the plurality of second light incident structures, and the light guide plate has an effective light exiting region and a transition region between the effective light exiting region and the point light source. The light incident surface is adjacent to the point light source to receive the light emitted by the point light source, and the light traveling inside the light guide plate is led out through the light exit surface. The light reflecting surface is located on the light-emitting side to guide the light entering the light guide plate from the light-incident surface to the light-emitting surface. A plurality of 7 1356204-incorporating light structures are formed on the light incident surface and each of the two adjacent first light incident structures arranged in substantially the same direction has a different size. Each of the plurality of second light incident structures is formed in a region of the transition region excluding the light surface and each of the two adjacent second light incident structures arranged in substantially the same direction has a different size. By this design, the light diffusion effect can be further improved by the fact that the light-incident structures of different sizes are simultaneously distributed on the light-incident surface and the regions outside the light-emitting surface in the transition region. [Embodiment] The foregoing and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the embodiments of the drawings. The directional terms mentioned in the following embodiments, for example, up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional term used is used to describe that it is not intended to limit the creation. Figure 5 is a schematic view showing an embodiment of the light guide plate design of the present invention. As shown in FIG. 5, the light guide plate 12 is configured to receive and emit light from at least one point of the light source (shown as two light-emitting diodes 14). The light guide plate 12 is formed adjacent to the side surface of the light-emitting diode 14 as a light-incident surface 12a, and the top surface formed at an angle with the light-incident surface 12a is formed as a light-emitting surface nb, and the bottom surface of the opposite side of the light-emitting surface 12b is formed as a light. Reflecting surface 12c. The light reflecting surface 丨 and the entire surface are distributed by a plurality of 稜鏡 structures having V-shaped grooves 20, and the major axis directions of the respective v-shaped grooves 2 平行 are parallel to each other. After the light emitted from the light-emitting diode 14 enters the light guide plate 12 through the light-incident surface 12a, the light-reflecting surface (5) then guides the light traveling inside the light guide plate 12 to the light-emitting surface 12b, and finally the light exits the light guide plate through the light-emitting surface 12b. 12. According to the design of the embodiment, the human face is _ different size _ round light into the light structure 16, 18, two different sizes of elliptical light-inducing structures l6, 18 are parallel to each other in the long axis direction on the light surface 12a Arranged alternately, and the distribution area thereof at least covers a rough projection area of each of the light-emitting diodes 14 on the light-incident surface 12a. The elliptical light-inducing structures 16, 18 encounter the incident light as the partial elliptical cylinders 16a, 18a, and the top surfaces (10), (10) 8 1356204 of the light-inducing structures 16, 18 are touched (four). According to the design of the embodiment, the ratio of the top surface area of the top 18 sT structure 10 and the area of the light surface structure light surface 18b having a smaller size in each of the _ neighboring light structures is It is set to be greater than or equal to 1.2 and less than or equal to 35. FIG. 6 is a schematic view showing another embodiment of the light guide plate design of the present invention. As shown in Fig. 6, two different sizes of light-introducing structures are alternately arranged on the human light surface 12a with a larger inch of light entering the light, . The light-incident structure having an elliptical light-incident structure 26 and having a small size is a V-type light-injecting light. The elliptical light-incident structure 26 encounters the front surface of the incident light as a partial cylindrical surface and the top surface thereof is a partial elliptical surface. The V-shaped light-incident structure 28 encounters the front surface of the incident light as the angular cylinder surface 28a and its top surface 28b. It is a trapezoidal surface. According to the design of the embodiment, in each of the two adjacent light-incident structures, the area of the larger-sized elliptical light-incident structure top surface 26b and the smaller-sized V-type light-incident structure top surface 28b are The ratio is preferably set to be greater than or equal to 12 and less than or equal to %. " Figures 7A and 7B are schematic diagrams illustrating the effect of the two adjacent light-incorporating structures on the light diffusion enhancement effect of the (5) size. As shown on the right side of Figure M, the paths M1 and M2 (dashed lines) are assumed to be the path of travel after the incident light 1b 12 is deflected by the same size of the entrance light structure, and the path Nb N2 (solid line) is In fact, the incident light n, κ encounters a smaller size of the entrance structure of the light-emitting structure. It can be clearly seen from the comparison path ΜΙ, M2 and the path Chuan and Ν2 that the optical structures of two different sized adjacent persons significantly change the traveling path after the human light is deflected - and enhance the light diffusion effect. Further, as shown in Fig. 7A, the incident light η, 12 encounters different sizes of the trapezoidal surface 28a and the curved surface 26a, and the traveling path after the deflection can be changed to enhance the light diffusion effect. Referring to FIG. 5 again, in the environment where the point light source is used as the side light source, the light guide plate 12 can be divided into an effective light exit area EA and a transition area TA 'the transition area TA adjacent to the point light source position and have a contrasting bright/dark band distribution. It is impossible to become a blank area by changing the size of the outlets and the remedy of the density. In the effective light-emitting area EA, since the light has been diffused more uniformly, the effective display area (AA area) of the liquid crystal display panel can be superposed as the actual active area for providing the surface light source. Taking 18 leaf 9 1356204, the conventional R input substructure used in the standard backlight module as an example, when the distance from the light emitting diode to the effective light exiting area EA is 4.65 mm, the difference in brightness of the front end of the light guide plate is i92. 61cd/m2, the value can be regarded as an acceptable threshold. If the difference of the brightness of the light/dark band at the front end of the light guide plate is greater than the critical value of 192_61 cd/in2, it is a poor brightness uniformity. Furthermore, if the distance from the point source to the effective light exit area EA is shortened, the difference in brightness of the light/dark band at the front end of the light guide plate is increased. Therefore, by alternately setting the good light ship effect provided by two different cypress light structures, the point source can be used to effectively produce pure EA, and the uniformity of the job is improved.
暗帶輝度差異值仍小於臨界值）’獲得增加導光板上的有效出光區ea面 積的效果。 圖8A至圖9B為顯示於點光源至導光板有效出光區的距離為4 65咖 時’利用不同入光結構而得之光能量模擬分佈圖。圖8a顯示利用習知同 -尺寸的R入子結構而得之模擬結果，圖8B顯示利用交替設置不同尺寸 的弧形入光結構而得之模擬結果。比較圖8A及圖8B可知，圖8B之波 峰呈平坦的梯形而圖8A之波峰呈尖銳的三角形，且圖8b波峰至波谷間 的輝度差㈣顯祕圖Μ，可看料兩軸異尺相卿人光結構Μ 較習知同-尺寸的R入子結構有較佳的擴光能力。圖9Α顯示利用習知 同-尺寸的R入子結構而得之模擬結果，圖9Β顯示利用交替設置不同尺 寸的弧形入先結構及V型入光結構而得之模擬結果。比較圖Μ 可知，圖9Β波蜂至波谷間的輝度差距明顯小於圖9α，可看出 異尺寸的卿人錢構及V.統触料同 〃種相 較佳的擴光能力。@此，㈣設置砰尺相 人子結構有 區^面_效1 了獲件场增加導输有效出光 再者，僅需將沿實質同-方向排列之每兩相鄰入光 尺寸即可獲得良㈣先#散效果’入光結搆的截面外形 1356204 實施例之部分弧面及梯形面。於一實施例中，兩相鄰入光 尺寸之入光結構沿平行出光面12b方向切割的截面可為 :㈣，具較小又寸之入光結構沿平行出光面12b方向切割_面可為 -多邊形面(polygonalsurface) ’例如半圓形面搭配三角形帽_或弓 形面搭配梯形_ _料實施财，兩柯尺寸之相鄰从 結構的截面可均為-㈣，例如大半_ 配小半圓形面(圖肌)或曲 率非固定之弧面搭配弓形面(圖)等等。另外，若截面為部分正圓面、 部分橢圓面、或弓形面時’曲率半徑範圍為1//m至細_較佳；當 截面為三角形面或梯形面時，三角形面鄰近點光源之頂角α(圖)、: 梯形面兩側邊朝點光源延伸之夾角細1〇Β)的角度範圍為2度至⑼度 較佳。 又 ，於-實施例令，如圖U所示，具不同尺寸的入光結構可為形成於入 光面12a上且朝導光板12内部凹入之凹槽結構24，而不限定為圖5或圖 6所示突出於導光板平面外之凸塊綠再者，人統構並不限定於形成 於入光面！2a上，例如亦可如圖12所示，於過渡區ta _成複數不同 尺寸的凹槽結構24作為入光結構，且對應各個發光二極體μ位置排列 φ 呈至夕；^列。另外’亦可如圖ls所示，入光結構同時形成於入光面以 上及除入絲12a外_渡輯TA内，峨—錢高光繼效果且形 ''成；入光面12a上、或除入光面12a外的過渡區域TA内的入光結構截面 外形並不限定。 圖Μ為顯示本發明另—實施例之示意圖。如圖14所示，於採用單 ^發光一極體14作為側絲環境下，發光二極體μ可置於鄰近導光板 $之-角部處，且導光板12之角部形成—截面以作為人光面以且交替 分佈兩種㈣尺寸_圓人光結構16、18。再者，於單紐光二極 體14作為側光«境下，入光面以鄰接之導光板側面η可如圖Μ所 比6204 示為-平面或如圖15所示為—曲面，且如圖15所示，兩相鄰不同 的入光結構同樣可同時形成於入光面12a上及除入光面仏外的過渡區 域内。 圖16表列出發明人實際模擬本發日月與習知入光結構出光特性而得之 數值。於相同條件下’點光源發出之入射光經由交替排列不同尺寸的弧 形入光結構16(如圖5之實施例)擴光後，當點光源至有效出光區直線距 離縮減至3.5咖時，導光板前端的亮/暗帶輝度差異值為185 3 ▲，此 值在臨界範圍内，且總光輻射通量為〇 1〇3 w，平均輝度為72_, 因此，該實施例相較習知R入子結構可縮短點光源至有效出光區的 距離(縮減24.73%)而增加有效出光區面積(增加3 15%)。另一方面，點光 源發出之人射光軸㈣制不同尺寸的弧形人光結構及v型入光 (^圖6之實關)擴光後，當點光源至有效出光區直線距離縮減至3_ 時’導光板前端的亮/暗帶輝度差異值為19215秦2，此值在臨界範圍 内’且總綠射通量為ο] w，平均輝度為㈣5ed/m2韻，該實施例 =二:子結構可縮短點光源至有效出光區的直線距嶋 35.48/。)而增加有效出光區面積(增加4 52%)。 2上所述僅為舉雛，而非為限舰者。例如於導光板反射面上並 ^所構成之稜鏡結構，亦可形成如細_等任一 種導先微，。構，僅需能獲得將導光板内部行進之光線導出的效果即可。 何未脫離本發明之精神與齡，而對其進行之等效修改或變更， 句應已3於後附之申請專利細中，而非限定於上述之實施例。 【圖式簡單說明】 ®1為顯示—習知背光模組之示意圖。 圖2為顯示1知縣板亮/暗帶分佈之示意簡圖 12 圖3為顯示一習知入光結構之示意圖。 圖4為顯示另—習知人紐構之示意圖。 圖5為-示意圖，顯示本發明導光板設計之—實施例。 圖6為-示_，顯示本發明導光板設計之另—實施例。 圖及圖7B為本發明入光結構相較習知入子結 散能 力之說明圖。 諸至圖兜為顯示於點光源至導光板有效出光區的距離為秘麵 時利用不同入光結構而得之光能量模擬分佈圖。 =l〇A至圖10D為顯示本發明入光結構截面外型設計例之示意圖。 圖11為顯示本發明人光結構另_實施例之示意圖。 圖12為顯示本發明入光結構另—實施例之示意圖。 圖13為顯示本發明人光結構另—實施例之示意圖。 圖14為顯示本發明人統構另—實施例之示意圖。 圖15為顯示本發明入光結構另—實施例之示意圖。 圖16為本發明之人光結構與習知人統構1光特性比較圖。 【主要元件符號說明】 12導光板 12a 入光面 12b 出光面 12c 光反射面 14 發光二極體 16 Ί8 ' 26'28 入光結構 16a、18a、26a、28a 入光正面 16b' 18b > 26b'28b 頂自 13 1356204. 20 V型溝槽 24 凹槽結構 32 導光板側面 100 背光模組 102 導光板 102a 入光側面 102b 出光面 102c 底面 104 發光二極體 106 V型溝槽 110 亮帶 112 暗帶 120 V入子結構 122、132 入光面 130 R入子 II、12、Ml、M2、Nl、N2 光路徑 a 頂角 β 夾角 ΕΑ有效出光區 ΤΑ過渡區 14The dark band luminance difference value is still smaller than the critical value)' to obtain an effect of increasing the effective light-emitting area ea area on the light guide plate. 8A to FIG. 9B are diagrams showing the light energy simulation distributions obtained by using different light-input structures when the distance from the point source to the effective light-emitting area of the light guide plate is 4 65 kPa. Fig. 8a shows the simulation results obtained by using the conventional same-size R-in substructure, and Fig. 8B shows the simulation results obtained by alternately setting the arc-shaped entrance structures of different sizes. 8A and FIG. 8B, the peak of FIG. 8B is a flat trapezoid and the peak of FIG. 8A is a sharp triangle, and the difference between the peaks and troughs of FIG. 8b is (4), and the two-axis heterogeneous phase can be seen. Qingren's light structure 较 has a better light-expanding ability than the conventional-size R-injection structure. Fig. 9A shows the simulation results obtained by using the conventional same-sized R-input structure, and Fig. 9B shows the simulation results obtained by alternately setting the arc-shaped preliminary structure and the V-shaped light-incident structure of different sizes. Comparing the graphs, it can be seen that the difference in luminance between the bees and the troughs in Fig. 9 is significantly smaller than that in Fig. 9α, and it can be seen that the different sizes of the Qing people and the V. system contact materials have better light-expanding ability. @这, (4) Set the structure of the human body with the area ^ surface _ effect 1 to increase the effective field of the transmission field, and then only need to arrange each adjacent optical size along the same direction in the same direction Good (four) first #散效果' cross-sectional shape of the light structure 1356204 Part of the arc and trapezoidal surface of the embodiment. In an embodiment, the cross-section of the two adjacent light-input light-emitting structures along the parallel light-emitting surface 12b may be: (4), and the smaller and inch-shaped light-inducing structure is cut along the parallel light-emitting surface 12b. - Polygonal surface (for example, a semi-circular surface with a triangular cap _ or a bow-shaped surface with a trapezoidal _ _ material implementation, the cross section of the two ke sub-structures can be - (four), for example, the majority _ with a small semicircle The surface (picture muscle) or the curved surface with non-fixed curvature is matched with the curved surface (figure) and so on. In addition, if the cross section is a partial orthographic surface, a partial elliptical surface, or a curved surface, the radius of curvature ranges from 1//m to fine_best; when the cross section is a triangular or trapezoidal surface, the triangular surface is adjacent to the top of the point source. The angle α (Fig.), the angle between the two sides of the trapezoidal surface extending toward the point source is fine, and the angle is preferably from 2 degrees to (9) degrees. Moreover, in the embodiment, as shown in FIG. U, the light-incident structure having different sizes may be the groove structure 24 formed on the light-incident surface 12a and recessed toward the inside of the light guide plate 12, and is not limited to FIG. Or the bump green protruding from the plane of the light guide plate shown in Fig. 6, the human structure is not limited to being formed on the light incident surface! 2a, for example, as shown in Fig. 12, the groove structure 24 having a plurality of different sizes in the transition region ta_ is used as the light incident structure, and φ is arranged in the position corresponding to each of the light-emitting diodes. In addition, as shown in Figure ls, the light-incident structure is formed at the same time above the light-incident surface and in addition to the wire 12a. In the T-TA, the 峨-Qi Gaoguang follows the effect and is shaped into the light-emitting surface 12a. The cross-sectional shape of the light-incident structure in the transition region TA other than the light-incident surface 12a is not limited. BRIEF DESCRIPTION OF THE DRAWINGS Figure 2 is a schematic view showing another embodiment of the present invention. As shown in FIG. 14, in the case where the single-light-emitting body 14 is used as the side wire, the light-emitting diode μ can be placed adjacent to the corner of the light guide plate, and the corner portion of the light guide plate 12 is formed into a cross section. Two (four) dimensions _ round human light structures 16, 18 are alternately distributed as human faces. Furthermore, in the case where the single-light diode 14 is used as the side light, the light-incident surface is adjacent to the side surface η of the light guide plate as shown in FIG. 6204 as a plane or as shown in FIG. As shown in FIG. 15, two adjacent light incident structures can be simultaneously formed on the light incident surface 12a and in the transition region except for the light surface. Fig. 16 shows the numerical values obtained by the inventors actually simulating the light-emitting characteristics of the present day and the conventional light-incident structure. Under the same conditions, the incident light emitted by the point source is diffused by alternately arranging the arc-shaped light-incident structures 16 of different sizes (as in the embodiment of FIG. 5), and when the linear distance from the point source to the effective light-emitting area is reduced to 3.5 coffee, The difference in brightness of the light/dark band at the front end of the light guide plate is 185 3 ▲. This value is within the critical range, and the total optical radiant flux is 〇1〇3 w, and the average luminance is 72_. Therefore, this embodiment is relatively well known. The R substructure can shorten the distance from the point source to the effective exit area (reduced by 24.73%) and increase the effective exit area (increase by 3 15%). On the other hand, after the light source axis emitted by the point source (4) is made of different shapes of curved human light structure and v-shaped light (^Fig. 6), the linear distance from the point source to the effective light exit area is reduced to 3_ When the brightness of the front end of the light guide plate is 19215 Qin 2, the value is within the critical range and the total green flux is ο] w, and the average luminance is (4) 5 ed / m 2 rhyme, this embodiment = two: The substructure can shorten the linear distance 嶋35.48/ from the point source to the effective exit area. ) and increase the effective light exit area (increased by 4 52%). 2 is only a chick, not a ship limiter. For example, the structure of the crucible formed on the reflecting surface of the light guide plate may be formed by any of the first and second. It is only necessary to obtain the effect of deriving the light traveling inside the light guide plate. Without departing from the spirit and scope of the invention, the equivalent modifications and variations thereof are intended to be included in the appended claims. [Simple description of the diagram] ® 1 is a schematic diagram of the conventional backlight module. Fig. 2 is a schematic diagram showing the distribution of the light/dark band of a Chixian plate. Fig. 3 is a schematic view showing a conventional light-incident structure. Fig. 4 is a schematic view showing another conventional one. Figure 5 is a schematic view showing an embodiment of a light guide plate design of the present invention. Fig. 6 is a view showing another embodiment of the design of the light guide plate of the present invention. Fig. 7B is an explanatory view showing the ability of the light-injecting structure of the present invention to be compared with the conventional one. The image pockets are simulated distribution maps of light energy obtained by using different light-input structures when the distance from the point source to the effective light-emitting area of the light guide is the secret surface. From Fig. 10D to Fig. 10D is a schematic view showing a design example of the cross-section of the light-incident structure of the present invention. Fig. 11 is a view showing another embodiment of the light structure of the present inventors. Figure 12 is a schematic view showing another embodiment of the light-incident structure of the present invention. Figure 13 is a schematic view showing another embodiment of the light structure of the present inventors. Figure 14 is a schematic view showing another embodiment of the present inventors. Fig. 15 is a view showing another embodiment of the light-incident structure of the present invention. Fig. 16 is a view showing the comparison of the light characteristics of the human light structure of the present invention and the conventional human structure 1. [Description of main component symbols] 12 light guide plate 12a light incident surface 12b light emitting surface 12c light reflecting surface 14 light emitting diode 16 Ί 8 ' 26'28 light incident structure 16a, 18a, 26a, 28a light incident front surface 16b' 18b > 26b '28b top from 13 1356204. 20 V-shaped groove 24 groove structure 32 light guide plate side 100 backlight module 102 light guide plate 102a light-incident side 102b light-emitting surface 102c bottom surface 104 light-emitting diode 106 V-shaped groove 110 bright band 112 Dark band 120 V into substructure 122, 132 light entrance surface 130 R into the sub-II, 12, Ml, M2, Nl, N2 light path a apex angle β angle ΕΑ effective light exit zone transition zone 14