201009405 六、發明說明： 【發明所屬之技術領域】 本創作涉及-種·於背光模_縣板改良結構。 【先前技術】 背光模組的應用十分普遍，舉凡筆記型電腦、顯示器、手機、 液晶電視、…等顯示器本身不會發光的電子設備都需要背光模組 ❾來提供光源。 -般的絲模組包含有導光板與光源，對於機體厚度要求較 薄的電子產品而言，通常妓用LED做為光源，並將該光源設於 導光板側邊的入光面’導光板的第一側面則設置一反射片，相對 的第二側面做為出光面並設置由擴散片與增光片等所組成的複數 光學膜片。光源所發出的姐由人絲投射進人導歧内傳遞， 部分光線由反射片反射，再依序從出光面通過擴散片與增光片射 ，出。 基於LED所發射的光線具有良好指向性的賴，—般的背光 模組都在導光板的入光面設置複數個光源，使多數光源將光線射 入導光板而能在導光板的出光面呈現出發光效果^惟，由於光源 4曰向f生的因素’導光板在光線直接通過的位置之亮度相對較高^ 未直接通過的位置職度相對較低；又，由於光線的傳導會隨著 距離的延長而衰減’使得導光板距離光源近的位置之亮度相對較 高’而距離光源較遠的位置則亮度相對較低，致使整個導光板的 201009405 党度可能不均勻’因此，習知背光模組的導絲，均會設置用來 t 使導光板發光均勻化的結構。 ，例如台灣補公告第5咖號，是在導歧職於點光源方 向設有數絲形的細微結構，㈣轉細微結構正對應點光源的 入光區為中心作形狀、角度、密度、大小或位置的配置，以取得 點光源入射光均勻化輸出的效果。 台灣專利1242674號’収在導光板之人辆設置多數排列 β之微結構，而多數微結構之排列方向與導光板之出光面係呈斜之 形態，使得光源之光線通過多數傾斜排狀微結構時，會將光源 之光線偏向導向反射面，以增加光線之利用率。 台灣專利Μ317584號，則是在導光板的入光面上設置ν型凹 槽’以讓由人光面人光的光源，朗”凹槽晴射，可快速由 導光板的出光面射出而作為顯示光源，據而減少光源在導光板内 的傳遞路徑，以減少光能的耗損，來降低廢熱之產生，其可節省 ® 能源之消耗，同時降低使用成本。 前述各種習知技術之導光板人光_微結構，讀上 等的節距與相等的深度，此對於導光板的整體發光均勾化固然有 所助益’但對於欲在導光板取得局部發光輝度的增強可能有所不 【發明内容】 本發明社要目的’係針對f知背光之導光板入光面的 201009405 微。構進行？文良’使導光板的出光面除了可以獲得均句化的發光 果卜還可〖X藉由微結構之節距或深度的改變而在導光板的局 部產生不同的輝度效果。 籲 本毛月的特徵’係將設於導光板之人光面的微結構，依導光 板出光面所要表現輝度需要而設為具備不同的節距或/及深度，使 /道穿透轉微結構進人導光板内後，藉由光線的反射與折射而 光板的特定區域提高輝度，或使導光板的發光均勾化。 树日靖於所麵結構峨術手段，係在導光板的入光面成 ^硬數突出該入光面的突出物’兩突出物之間形成一節距，每 :突出物具有一高度’該節距與高度係依導光板所欲獲得之輝度 耘度而配合變化，以產生進入導光板的不同光量。 面對於所述微結構的另一技術手段，係在導光板的入光 —複數低於解光板之人光蝴凹部，_部之間形成一 魯 X輝4度而配合變化，以產生進入導光板的不同光量。 可以種的選擇，本發明微結構之突出物或凹部，其節距 :目’’但各突出物的高度或各凹部的深度不—定相等。 产可麵’本發繼構之娜的高度或凹部的深 又了以均相等，但各節距不一定相等。 :為第三種選擇，本發明微結構之該等突出物的節距與高 ^或凹部的距節與深度，可以均不一定相等。 做為第四種選擇，本發賴結構之如物如部，其在入光 201009405 面的排列’可以從對稱的兩側往中間逐漸減小高度。 做為第五種選擇，本發明微結構之突出物或二部，其在 面的排列，可以從對稱的兩侧往中間逐漸增加高度。 做為第六種選擇，本發明微結構之突出物或二部，並在 面的排列，可以從對稱的兩侧往中間逐漸減小節距。- ❹ 做為第七種選擇，本發明微結構之突出物或凹部，其在 面的排列，可以從對稱的兩侧往中間逐漸增加節距。 =發明之微結構突峨凹部的較佳實施例，係從入 -侧邊延伸到相對的另m述 方向的斷面可以是：_、本_ ^ 晚直於光入射 /疋一角形、+固形、錐形或任何適當的幾何形狀。 述的微結構，當導光板的局部位置需要較高的輝声 二二減小對應該局部位置之入光面的突出物高度或增加二 冰又，也可以擴大突出物或凹部的節距，以增加對應該局部位置 的進先量。相反的，當導光板的局部位置需要較低的輝度時，則 可以增加對應該局部位置之入光面的突出物高度或減小凹部深201009405 VI. Description of the invention: [Technical field to which the invention pertains] This creation relates to a modified structure of a backlight module. [Prior Art] The application of the backlight module is very common. For electronic devices such as notebook computers, monitors, mobile phones, LCD TVs, etc., which do not emit light by themselves, a backlight module is required to provide a light source. The general-purpose silk module comprises a light guide plate and a light source. For an electronic product with a thin thickness of the body, an LED is generally used as a light source, and the light source is disposed on the light-incident surface of the light guide plate. The first side is provided with a reflection sheet, and the opposite second side is used as a light-emitting surface and a plurality of optical films composed of a diffusion sheet and a brightness enhancement sheet are disposed. The sister emitted by the light source is projected into the human guide by the human filament, and part of the light is reflected by the reflection sheet, and then sequentially emitted from the light exit surface through the diffusion sheet and the brightness enhancement sheet. The light emitted by the LED has good directivity. The general backlight module is provided with a plurality of light sources on the light incident surface of the light guide plate, so that most of the light sources are incident on the light guide plate and can be presented on the light exit surface of the light guide plate. The illuminating effect is only due to the fact that the brightness of the light source 4 is relatively high due to the factor of the light source 4 f. The position of the light guide plate at the position where the light passes directly is relatively low. The position of the position that is not directly passed is relatively low; The extension of the distance is attenuated 'so that the brightness of the light guide plate is relatively high from the position near the light source', and the position farther from the light source is relatively low, so that the 201009405 party of the entire light guide plate may be uneven. Therefore, the conventional backlight The guide wires of the module are provided with a structure for making the light guide plate uniform. For example, Taiwan’s Supplement No. 5 No. 3 is a micro-structure with a number of filaments in the direction of the point source. (4) The sub-structure of the sub-light source is centered on the entrance area of the point source for shape, angle, density, size or The position is configured to obtain the effect of uniformizing the output of the incident light from the point source. Taiwan Patent No. 1242674 'People that are placed on the light guide plate are arranged with a majority of the microstructures of β, and the arrangement direction of most of the microstructures is oblique to the light exit surface of the light guide plate, so that the light of the light source passes through most inclined rows of microstructures. When the light of the light source is directed toward the reflective surface, the utilization of the light is increased. Taiwan Patent No. 317584, which is provided with a v-shaped groove on the light-incident surface of the light guide plate to allow the light source of the human face to be lighted, and the groove is transparent, which can be quickly emitted from the light-emitting surface of the light guide plate. The light source is displayed, thereby reducing the transmission path of the light source in the light guide plate, thereby reducing the loss of light energy, thereby reducing the generation of waste heat, which can save the consumption of the energy source and reduce the use cost. The light guide plate of the above various conventional technologies Light_microstructure, read the upper pitch and the same depth, which is helpful for the overall illumination of the light guide plate. However, there may be some enhancements to the local luminance of the light guide plate. Contents] The purpose of the invention is to use the 201009405 micro-integration of the light-input surface of the light guide plate of the backlight. The structure of the light-emitting surface of the light guide plate can be obtained by using the uniform light-emitting surface. The pitch or depth of the microstructure changes to produce different brightness effects in the local part of the light guide plate. The feature of the moon is the microstructure of the light surface of the light guide plate, according to the light surface of the light guide plate. The brightness needs to be set to have different pitches or/and depths, so that after the passage of the micro-structure into the light guide plate, the specific area of the light plate is enhanced by the reflection and refraction of the light, or the light guide plate is made. The illuminating light of the tree is in the structure of the surface of the light guide plate, forming a section between the two protrusions on the light-incident surface of the light guide plate and the protrusion of the light-incident surface. The material has a height 'the pitch and the height are matched according to the brightness of the light guide plate to obtain different amounts of light entering the light guide plate. Another technical means for the microstructure is the light guide plate The entrance light-complex is lower than the light-receiving portion of the light-emitting plate, and a radiance of 4 degrees is formed between the _ portions to match the change to generate different amounts of light entering the light guide plate. The selection of the micro-structure of the present invention can be selected The object or the recess, the pitch of which is: ''but the height of each protrusion or the depth of each recess is not equal. The height of the hair or the depth of the concave part of the hair is equal, but The pitches are not necessarily equal. : For the third Alternatively, the pitch of the protrusions of the microstructure of the present invention may not necessarily be equal to the pitch or depth of the high or concave portion. As a fourth option, the structure of the present invention is as follows. The arrangement of the light 201009405 surface can be gradually reduced from the symmetrical sides to the middle. As a fifth option, the protrusions or the two parts of the microstructure of the present invention can be arranged on the sides from the symmetrical sides. Gradually increase the height in the middle. As a sixth option, the protrusions or the two parts of the microstructure of the present invention, and the arrangement of the faces, can gradually reduce the pitch from the symmetrical sides to the middle. - ❹ as the seventh Alternatively, the protrusions or recesses of the microstructures of the present invention, in the arrangement of the faces, may gradually increase the pitch from the symmetrical sides to the middle. = Preferred embodiments of the invented microstructured projecting recesses are from the in-side The section extending to the opposite other direction may be: _, _ ^ late to the light incident / 疋 angle, + solid, tapered or any suitable geometry. The microstructure described above, when the local position of the light guide plate requires a high glow, the height of the protrusion corresponding to the light incident surface of the local position is increased or the ice is increased, and the pitch of the protrusion or the recess can also be enlarged. To increase the amount of the corresponding local position. Conversely, when the local position of the light guide plate requires a lower luminance, the height of the protrusion corresponding to the light incident surface of the local position can be increased or the depth of the concave portion can be reduced.
度，也可以縮小突出物或凹部的節距，以減少對應該 進光量。 J 【實施方式】 以下配合圖式及元件符麟本發_實財式做更詳細的說 明，俾使熟習朗技藝者在研讀本說料後能據以實施。 第-圖顯示本發明的導光板！，具有一位於側邊的入光面⑴ 201009405 並乂最大的側面做為出光面i2，所述入光面u形成有複數微結 構13並在入光面u處設置複數光源2，光源2可將光線投射通 過微、、"構13進人導光板1⑽遞’光線在通職結構時產生反射 ”折射後再進人導光板，進而由出光面12呈現出較為均勻的發光 效果本發明的特徵，係藉由微結構的特殊設計，以改變光線通 過微結構後的光4 ’ _達_整出光面12輝度的效果。本發明 微、。構13可以有_形態，第—種形態為第—圖至第九圖所示 ©的犬出入光面U表面的突出物版，第二娜態為第十圖至第十 八圖所示的低於入光面11表面的凹部13b。 再參閱第-圖所示’本發明的其中一實施例，係將突出入光 =11的微結構—體成型為複數個垂直於人光面之斷面呈三角形的 突出物13a，兩突出物13a之間的節距p均辦但各突出物的高 度=係由對稱兩侧往中間逐漸減小。第二圖所示的實施例，則是 1犬出物13a之間的節距？均相等，但各突出物的高度η係由對 私兩側往中間逐漸增加。因此，光線通過人光面丨1時，高度Η大 的突出物13a會形成較大絲阻，喊度⑸、的如物產生較小 的光阻’致使從低高度讀的光量較乡，便能在對賴低高度突 出物位置的導光板局部區域產生較高的輝度。 第三圖所示的實施例，為各突出物13a的高度相等，但節距？ 從對稱兩侧往中間逐漸擴大。第四圖所示的實施例，為該等突出 物13a的高度相等，但節距p從對稱兩側往中間逐漸縮小。因此， 光線通過入光面η時，節距p小的突出物13a因為密度高而形成 201009405 較大的光阻’㈣距PA的突出物因密度低而產生較小的光阻， 致使從低密度如物人㈣光量料，便能在對鏡低密度突出 物位置的導光板局部區域產生較高的輝度。 本發明的突出物13a除了可以如第—圖所示之三角形斷面以 外’也可咖第五騎示的呈半_之斷面；所述三角形或半圓 形斷面的突出物13a，可以從入光面的一側邊延伸到相對的另一側 邊(如第八圖所示）。也可以是在入光面u成型的複數單顆形態的 ❹半圓球體(如第六圖所示）或錐形體(如第七圖所示）。 此外’本發明的突出物版，其節距P與高度Η並不限於前述 的排列形態’而是可以依導栊局部輝度或均勻化程度的實際需 要在製痛&做變化’讓導光板的局部區域獲得不同的進光量而 產生特定的輝度。 第九圖係顯示本_設於導光板1之人絲11的另-種形離 微結構13為凹部13b的形態。第九圖所示的實施例，係在入光面 ❹1卜體成财複數個垂直於人絲丨〗之斷面呈三角形的凹部 13b’兩凹部13b之間的節距p均相等，但各凹部既的深度d係 由對稱兩側往中間逐漸減小。第十圖所示的實施例，則是兩凹部 13b之間的節距p均相等’但各凹部的深度d係由對稱兩侧往中間 逐漸增加。因此’光線通過人光面丨丨時深度D大的凹部伽會 形成較小的光阻，而深度D小的突出物產生較大的光阻，致使從 大深度入射的光量較大’便能在對應該大深度凹部位置的導光板 局部區域產生較高的輝度。 8 201009405 第十-圖所示的實施例，為各凹部13b的深度D相等，但節 距P從對稱兩側往中間逐漸擴大。第十二圖所示的實施例，為該 等凹部13b的深度相等，但節距p從對稱兩側往中間逐漸縮小。 因此4線通過入光面u時，節距p小的凹部伽因為密度高而 形成較大的光阻，而節距P大的凹部因密度低而產生較小的光阻， ❹ 致使從健度m卩人射献量财，魏树鏡健度凹部位 置的導光板局部區域產生較高的輝度。 本發明的凹部13b除了可以如第九圖所示之三角形斷面以 外’也可以如第十三圖所示的呈伟形之斷面；所述三角形或半 =形斷面的凹部13b，可以從入光面的一側邊延伸到相對的另一侧 沾i第十/、騎不）。也可以是在人絲U成型的複數 的半圓球形(如第十四圖所示）或錐形體(如第十五圖所示）。〜 獅Z，树明的凹部13b ’其節距p與深度D並不限於前述的 1 4，k可雜導歧局部輝度或㈣化程度的實際需要 2福硫變化，讓導光板的局部區_得不_ 生特定的輝度。 叩座 以上所_僅為用轉釋本伽之較佳實 保護之齡。 飾或變更，皆仍應包括在本發明意圖 201009405 【圖式簡單說明】 第:圖為顯示本翻之微結構為突出物且該等突 意圖。 心謂稱兩侧往中間逐漸減小之實施例示 fa;圖===微結構為突出物，且該等突出物的節距均 意圖。尺、μ度從對稱兩側往中間逐漸增加之實施例示 ❹ =梅綱撕__，麟 對稱兩側往中間逐漸擴大之實輯 等=.、’、員不本發明之微結構為突出物且該等突出物的高户相 第五圖Γ從對稱兩側往中間逐漸縮小之實施例示意圖。又 ❹ 射:向的斷面為半圓形之實施例示意：物垂直於光入 ^圖為顯林剌级賴為如物， 之實施例局部立體圖。 ㈣為+圓球體 峨鳩，簡麵錐恤 結構為突出物，且該突出物係從入光面 κ申到相對的另一侧邊之實施例示意圖。 等，本發明之微結構為凹部，且該相部的節距均相 第十圖的深触對稱關往巾間骑減小之實_示意圖。 圖為顯示本發明之微結構為凹部，且該相部㈣距均相 201009405 等但各凹部的味度從對稱兩側往中間逐漸增加之實施例示意圖。 第十-圖為顯示本發明之微結構為凹部，且該等凹部的深度相 等’但節距從對稱兩侧往中間逐漸擴大之實施例示意圖。 第十二圖為顯示本發明之微結構為凹部，且該等凹部的深度相 但節距從對稱兩側往中間逐漸縮小之實施例示意圖。 第十三圖為顯示本發明之微結構為凹部且該凹部垂直於光入射 方向的斷面為半圓形之實施例示意圖。 ©第十四圖為顯示本發明之微結構為凹部，且該凹部為半圓球形之 實施例局部立體圖。 第十五圖為顯示本發明之微結構為凹部，且該凹部為錐形之實施 例局部立體圖。 第十/、圖為顯不本發明之微結構為凹部，且該凹部係從入光面的 侧邊延伸到相對的另—侧邊之實施例示意圖。 ❹【主要元件符號說明】 1 ......導光板 11 ......入光面 12 ......出光面 13……微結構 13a……突出物 13b......凹部 2 ......光源 11 201009405 P......節距 Η......南度 D……深度Degrees can also be used to reduce the pitch of the protrusions or recesses to reduce the amount of light that should be incident. J [Embodiment] The following is a more detailed explanation of the pattern and the components of the 麟本本发_实财式, so that the skilled savvy artist can implement it after studying the material. The first figure shows the light guide of the present invention! , having a light-incident surface (1) 201009405 on the side and a maximum side as the light-emitting surface i2, the light-incident surface u is formed with a plurality of microstructures 13 and a plurality of light sources 2 are disposed at the light-incident surface u, and the light source 2 can be Projecting light through the micro, " structure 13 into the light guide plate 1 (10) hand 'light reflection in the active structure" refraction and then enter the light guide plate, and then the light-emitting surface 12 presents a more uniform luminous effect of the present invention The feature is a special design of the microstructure to change the effect of light passing through the microstructure 4 ' _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The projections of the dog's entrance and exit surface U shown in Figs. 1 to 9 are the concave portions 13b which are lower than the surface of the light incident surface 11 shown in Figs. 11 to 18. Referring to the first embodiment of the present invention, the microstructure of the present invention is formed by forming a plurality of protrusions 13a which are triangular in cross section perpendicular to the human light surface, and the two protrusions 13a. The pitch between the p is the same, but the height of each protrusion = from the symmetrical sides The embodiment shown in the second figure is that the pitch between the dogs 1a is equal, but the height η of each protrusion is gradually increased from the opposite side to the middle. Therefore, When the light passes through the human face 丨1, the highly enlarged protrusion 13a will form a larger wire resistance, and the screaming degree (5), such as the object produces a small light resistance, so that the amount of light read from the low height is better than the hometown. A high luminance is generated for a partial region of the light guide plate at a position of the low height protrusion. In the embodiment shown in the third figure, the heights of the protrusions 13a are equal, but the pitch is gradually enlarged from the bilateral sides to the middle. In the embodiment shown in Fig. 4, the heights of the protrusions 13a are equal, but the pitch p is gradually reduced from the symmetrical sides to the middle. Therefore, when the light passes through the light-incident surface η, the protrusion 13a having a small pitch p is The density is high and the formation of 201009405 is larger. The resistance of the (4) from the PA is low due to the low density, resulting in a low light density, such as the light density of the object, can be placed in the low density protrusion of the mirror. The local area of the light guide plate produces a higher luminance. The protrusion of the present invention In addition to the triangular cross-section shown in the first figure, 13a may also be a half-length section of the fifth riding; the triangular or semi-circular cross-section protrusion 13a may be from the light-incident surface. One side extends to the opposite side (as shown in Figure 8). It can also be a plurality of single-shaped domes (as shown in Figure 6) or cones (formed in Figure 6) formed on the entrance surface u. As shown in the seventh figure. In addition, the 'protrusion plate of the present invention, the pitch P and the height Η are not limited to the aforementioned arrangement form', but may be caused by the actual needs of the local brightness or the degree of homogenization. &Changes' Let the local area of the light guide plate obtain a different amount of light to produce a specific brightness. The ninth figure shows that the other type of the microstructure 13 of the human filament 11 provided on the light guide plate 1 is the concave portion 13b. Shape. In the embodiment shown in the ninth embodiment, the pitch p between the recessed portions 13b of the concave portion 13b' having a triangular cross section perpendicular to the human core is equal in the light-incident surface, but the concave portions are both The depth d is gradually reduced from the symmetrical sides to the middle. In the embodiment shown in the tenth embodiment, the pitches p between the two recessed portions 13b are equal', but the depth d of each of the recesses gradually increases from the symmetrical sides to the middle. Therefore, when the light passes through the human surface, the concave portion with a large depth D forms a small photoresist, and the protrusion with a small depth D produces a large light resistance, so that the amount of light incident from a large depth is large. A higher luminance is generated in a local region of the light guide plate corresponding to the position of the large depth recess. 8 201009405 In the embodiment shown in the tenth-figure, the depth D of each recess 13b is equal, but the pitch P gradually increases from the symmetrical sides to the middle. In the embodiment shown in Fig. 12, the depths of the concave portions 13b are equal, but the pitch p is gradually reduced from the symmetrical sides to the middle. Therefore, when the four lines pass through the entrance surface u, the concave portion of the pitch p is formed to have a large photoresist due to the high density, and the concave portion having a large pitch P has a small light resistance due to the low density, so that the The degree of 卩 卩 射 射 射 射 射 射 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏 魏The recessed portion 13b of the present invention may have a sizable cross section as shown in FIG. 13 in addition to the triangular cross section as shown in the ninth figure; the triangular or semi-shaped cross-section recessed portion 13b may It extends from one side of the light-incident surface to the opposite side, and it is tenth, and does not ride. It may also be a plurality of semi-spherical spheres (as shown in Fig. 14) or cones formed in the filament U (as shown in Fig. 15). ~ lion Z, Shuming's concave portion 13b' its pitch p and depth D are not limited to the aforementioned 14 4, k can be misleading local brightness or (four) degree of actual need 2 Fu sulfur change, let the local area of the light guide plate _ don't get a specific brightness.叩座 Above _ is only the age of better protection with the release of the gamma. Decorations or changes should still be included in the intention of the present invention. 201009405 [Simple description of the drawings] The figure: shows the microstructure of the turn over as a protrusion and the intention. The embodiment in which the heart is said to gradually decrease toward the middle is shown as fa; Fig. === The microstructure is a protrusion, and the pitch of the protrusions is intended. The embodiment in which the ruler and the μ degree gradually increase from the symmetrical sides to the middle shows that the ❹=Mei gang tear __, the symmetry of the two sides of the symmetry gradually expands to the middle, etc. =., ', the member does not have the microstructure of the invention as a protrusion And the fifth figure of the high household phase of the protrusions is a schematic view of the embodiment which is gradually reduced from the symmetrical sides to the middle. Further, the illuminating: the embodiment in which the cross section is semicircular is shown in the figure: the object is perpendicular to the light. The figure is a partial perspective view of the embodiment of the lining. (4) The +-spherical body 峨鸠, the simple-faced t-shirt structure is a protrusion, and the protrusion is a schematic diagram of an embodiment from the light-incident surface κ to the opposite side. Etc., the microstructure of the present invention is a concave portion, and the pitch of the phase portion is uniform. The deep-symmetric symmetry of the tenth figure is a schematic diagram of the reduction of riding between the towels. The figure shows a schematic view of an embodiment in which the microstructure of the present invention is a concave portion, and the phase portion (4) is uniform from the uniform phase 201009405, but the taste of each concave portion gradually increases from the symmetrical sides to the middle. The tenth-figure is a schematic view showing an embodiment in which the microstructure of the present invention is a concave portion, and the depths of the concave portions are equal, but the pitch is gradually enlarged from the bilateral sides to the middle. Fig. 12 is a view showing an embodiment in which the microstructure of the present invention is a concave portion, and the depths of the concave portions are gradually reduced from the symmetrical sides to the middle. Fig. 13 is a view showing an embodiment in which the microstructure of the present invention is a concave portion and the concave portion is semicircular in a direction perpendicular to the incident direction of light. The fourteenth drawing is a partial perspective view showing an embodiment in which the microstructure of the present invention is a concave portion and the concave portion is a semi-spherical shape. Fig. 15 is a partial perspective view showing an embodiment in which the microstructure of the present invention is a concave portion and the concave portion is tapered. Tenth/FIG. is a schematic view showing an embodiment in which the microstructure of the present invention is a recess and the recess extends from the side of the light incident surface to the opposite other side. ❹【Main component symbol description】 1 ...... Light guide plate 11... Light-in surface 12... Light-emitting surface 13... Microstructure 13a... Projection 13b.... ..recess 2...light source 11 201009405 P...pitch Η...South D...depth
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