1331277 099年10月27日梭正替换頁 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種導光板及採用該導光板之背光模組，尤 其涉及一種側光式背光模組。 【先前技術】 [0002] 由於液晶顯示器具有輕、薄、耗電小等優點，廣泛應用 於筆記本電腦、手機、個人數位助理等現代化資訊設備 。因爲液晶顯示器中之液晶本身不具發光特性，爲達到 顯示效果，需給液晶顯示器面板提供一面光源裝置，如 背光模組，其功能在於向液晶顯示器面板提供輝度充分 且分佈均勻之面光源。 [0003] 背光模組可按結構分爲側光式背光模組及直下式背光模 組二種。 [0004] 請參閱第一圖，先前技術之側光式背光模組10包括光源 11及導光板12，該光源11靠近該導光板12之入光面122 。其中，導光板12 —般由聚曱基丙烯酸酯（PMMA)、聚碳 酸酯（PC)等透明材料製成。該光源11採用複數發光二極 體（Light Emitting Diode, LED)。另外，亦可採用 冷陰極營光管（Cold Cathode Fluorescent Lamp， CCFL)。 [0005] 目前，小尺寸背光模組多用單個或複數LED做光源；大尺 寸背光模組多用CCFL做光源。與CCFL相比，LED具有壽 命長，色彩艶麗，可靠性高之優點。CCFL中含有汞，所 以於環境保護方面，LED也具有顯著優點。故，隨著技術 之發展，L E D作為光源將成為一種趨勢。 094124902 表單編號 A0101 第 4 頁/共 17 頁 0993387442-0 1337277 年10月27日&替换！^ I [⑽〇 ]准，採用L E D做光源11之背光模組1 〇中，導光板12靠近 光源11之區域容易出現光柱亮區丨4，以及導光板相對應 於LED之間部分容易出現陰影區16。此現象稱為光柱現象 ’其大大降低導光板之發光均句性。 [0007] 爲了提高導光板發光均勻性，先前技術採用於導光板入 光面形成各種微結構之設計。 [0008] 請參見第二圖，其為先前技術中之一種背光模組2〇，該 背光模組20包括複數LED點光源21及一導光板22，其包 括一靠近該LED點光源21之入光面222，該入光面222相 對應於該LED點光源21處設有複數鋸齒棱鏡結構224。 [0009] 請參見第三圖，其為先前技術中之另一種背光模組30， 該背光模組30包括複數LED點光源31及一導光板32，其 包括一靠近該LED點光源31之入光面322，該入光面322 相對應於該LED點光源31處設有複數錐形等切槽結構324 〇 [0010] 上述背光模組20、30之入光面微結構（鋸齒棱鏡結構224 或錐形等切槽結構324)—定程度上可消除光柱現象，惟 ，上述微結構之溝槽間距约為數百微米，微結構尺寸較 小，不適合模具設計之簡化要求& [0011] 有鑑於此，提供一種藉由簡化入光面微結構設計，以實 現模具設計簡化並消除入光面光柱現象之導光板及採用 該導光板之背光模組實為必要。 【發明内容】 [0012] 下面將以若干實施例說明一種藉由簡化入光面微結構設 094124902 表單編號A01D1 第5頁/共丨7頁 0993387442Ό I33J277 099年10月27日修正替換頁 計，以實現模具設計簡化並保證發光均勻性之導光板， 以及一種採用該導光板之背光模組。 [0013] 為實現上述内容，提供一種導光板，其包括：一入光面 ，一與該入光面連接之出光面，一與該出光面相對之底 面，該入光面設有至少一個凸起或凹槽，以及一形成於 該凸起或凹槽表面之多層反射膜。 [0014] 優選的，該凸起包括沿入光面軸向垂直方向設置之三角 形柱體、半球面柱體或非球面柱體。 [0015] 優選的，該凹槽包括沿入光面軸向垂直方向設置之三角 形柱體凹槽、半球面柱體凹槽或非球面柱體凹槽。 [0016] 優選的，該起或凹槽沿入光面之底邊長度範圍為 1. 7〜5. 1毫米。 [0017] 優選的，該多層反射膜係由高、低折射率之二種材料交 替而成，其中每層膜之光學厚度為某一可見光波長之四 分之一。 [0018] 以及，為實現上述内容，提供一種背光模組，其包括： 一導光板，其包括一入光面、一與該入光面連接的出光 面及一與該出光面相對的底面；至少一點光源，其靠近 該入光面，該入光面相對應於該點光源處設有單個凸起 或凹槽，及一形成於該凸起或凹槽表面之多層反射膜； 以及至少一反光罩靠近並圍住該點光源，用於反射部分 光線進入該導光板。 [0019] 相對於先前技術，本實施例之導光板由於其入光面具有 094124902 表單編號A0101 第6頁/共17頁 0993387442-0 1337277 , . ____ 099年10月27日按正替換頁 結構簡單、大小適當之凸起或凹槽，且該凸起或凹槽鍍 有多層反射膜，導光板入光面凸起或凹槽結構在與複數 LED點光源近距離搭配時，LED點光源靠近入光面的光強 度由於凸起或凹槽結構與多層反射膜之配合作用而適當 減少，即通過控制該凸起或凹槽結構及選擇適當反射率 之多層反射膜材料，可適當控制光束進入導光板之光強 度，從而消除入光面之光柱現像；另，於光源對應之入 光面處，由尺寸較大單個凸起或凹槽取代先前技術中採 用複數尺寸較小之微結構，使本實施例之導光板模具設 計簡化。故，本實施例之導光板及採用該導光板之背光 模組可獲得更佳之光出射均勻性。 【實施方式】 [0020] 下面結合附圖將對本發明實施例作進一步之詳細說明。 [0021] 請參見第四圖，本發明第一實施例提供一種背光模組40 ，其包括複數LED點光源41、一導光板42及複數反光罩 43。該導光板42包括一入光面422，一與該入光面422連 接之出光面425，一與該出光面425相對之底面426，該 入光面422設有複數週期隔開排列之凸起424，該凸起 424為沿入光面422軸向垂直方向設置之三角形柱體，其 從入光面42向外延伸凸出，每個凸起424表面形成一多層 反射膜（圖未示）。每個LED點光源41與每個凸起424相應 靠近。每個反光罩43均具有一大致呈拋物線之曲面，該 拋物線曲面底端靠近每個LED點光源41，曲面朝向每個 LED點光源41，且複數反光罩43相互連接，用於最大限度 地反射部分光線重新進入該導光板42，提高光利用率。 094124902 表單編號A0101 第7頁/共17頁 0993387442-0 [0022] I 099年10月27日按正 4反光罩43為同時具有㈣反射特性及散熱特性之金屬 材料製成，如鋼、銀等金屬。 …入光面422之軸向平行方向，該凸起424為等腰三角形 其底角小於或等於10度，沿入光面422之底邊長度範圍 為1. 7 5. 1毫米。leD點光源41與該凸起424頂點之間距 範圍為卜丨.7毫米》該反光罩43與LED點光源41之間距範 圍為卜5毫米《本實施例之該導光板42為平板型該凸起 424之三角形柱體高度為該導光板42之厚度，其範圍為 〇. 7-1. 5毫米。 [0023] 该多層反射膜係由高、低折射率之二種材料交替蒸鍍而 成’每層膜之光學厚度為某一可見光波長之四分之一。 在適當選擇折射率合適之材料情況下，各種反射波通過 干涉之相干增強使多層反射膜具有高反射率。其中，高 折射率材料之折射率範圍為2·卜2.4，其可選自五氧化鈦 (Τ、〇5)、二氧化鈥（Ti〇3)、氧化銳（Nb〇x)或五氧化二 纽（Ta2〇p ;低折射率材料之折射率範圍為1. 4-1. 6，其 可選自二氧化矽（Si〇2)或三氧化二鋁（A1 〇 )。本實施例 乙 0 採用五氡化鈦作為高折射率材料、二氧化矽作為低折射 率材料。本實施例之該多層反射膜之反射率範圍為 40〜70%，相應的，透光率範圍為3〇〜60%。 [0024] 本實施例之背光模組40使用時，LED點光源41發出不均勻 分佈之光束，LED點光源41朝向該凸起424發出之光束強 度較大。在該凸起424及多層反射膜配合作用下，該光束 被部分反射回該LED點光源41或反光罩43，進入導光板 42之光束強度被有效減少，使其光強度與其附近之非凸 094124902 表單編號A0101 0993387442-0 第8頁/共17頁 1337277 099年10月27日 起處大致相當’從而消除入光面光柱現象。另外，被反 射之光束可進一步被循環利用。本實施例可以通過控制 該凸起結構及具有不同折射率之多層反射膜材料，選擇 適當之光束反射率。 [0025] 請參見第五圖，本發明第二實施例提供一種背光模組5〇 ，其包括複數LED點光源51、一導光板52及複數反光罩 53。本實施例之背光模組50與第一實施例大致相同，不 同之處在於形成於該導光板52之入光面522之凸起524之 結構’該凸起524為沿入光面522轴向垂直方向設置之半 圓型枉體’其從入光面52向外延伸凸出，每個凸起524表 面形成一多層反射膜（圖未示）。該凸起524之半圓变直秘 與第一實施例三角形底邊相等。另外，該凸起524亦 < 遂 用適當之非球面曲面凸起。 [0026] 請參見第六圖，本發明第三實施例提供一種背光模組6〇 ，其包括複數LED點光源61、一導光板62及複數反光革 6 3 ^本實施例之背光模组6 0與第二實施例大致相同，不 同之處在於複數凹槽624週期隔開排列於該導光板62八光 面622 ’其為沿入光面622料向垂直方向設置之半圓唆枉 體四槽。該複數凹槽624從入光面62向内延伸形成，每僴 凹槽624表面形成一多層反射膜（圓未示）。該凹槽624之 半徑與第二實施例半徑相等，LED點光源61與該凹槽624 之槽底之間距範圍為卜丨· 7毫米。該反光罩63與LED舜光 源61之間距範圍為卜5毫米。另外，該四槽624亦寸遂用 適當之非球面曲面凸起或如第一實施例所述之三角形枉 體凹槽。 094124902 表單編號A0101 第9頁/共π頁 0993387442-0 1337277 099年10月27日核正替換頁 [0027] 可以理解，本發明之點光源與導光板入光面之凸起或凹 槽之間距依照不同光源、光源數量與導光板入光面尺寸 大小而定，如導光板入光面寬度為W以及採用五顆LED點 光源，貝IILED光源與入光面之凸起或凹槽之頂點或槽底間 距可優選採用W/10，同理，如使用單顆LED點光源，則 LED點光源與入光面之凸起或凹槽之頂點或槽底間距可優 選採用W/2。 [0028] 可以理解，本發明之導光板亦可於其出光面，底面設置 各種微結構，以進一步提高導光板及採用該導光板之背 光模組之整體光學性能。本發明之導光板亦可採用兩相 對應之入光面設計，以及搭配相應複數點光源及反光罩 設計組成背光模組。另外，本發明背光模組之反光罩亦 可採用一反光罩同時圍住複數點光源之設計，反光罩亦 可採用具有一定曲率之曲面。 [0029] 本實施例之導光板由於其入光面具有結構簡單、大小適 當之凸起或凹槽，且該凸起或凹槽鍍有多層反射膜，導 光板入光面凸起或凹槽結構在與複數LED點光源近距離搭 配時，LED點光源靠近入光面的光強度由於凸起或凹槽結 構與多層反射膜之配合作用而適當減少，即通過控制該 凸起或凹槽結構及選擇適當反射率之多層反射膜材料， 可適當控制光束進入導光板之光強度，從而消除入光面 之光柱現像；另，於光源對應之入光面處，由尺寸較大 之單個凸起或凹槽取代先前技術中採用之複數尺寸較小 之微結構，使本實施例之導光板模具設計簡化。故，本 實施例之導光板及採用該導光板之背光模組可獲得更佳 094124902 表單編號Λ0101 第10頁/共17頁 0993387442-0 13372.77 _ 099年10月27日俊正替换頁 均勻之光學特性。 [〇〇3〇] 综上所述，本發明確已符合發明專利要件，爰依法提出 專利申請。惟，以上所述者僅為本發明之較佳實施例， 舉凡熟悉本案技藝之人士，於援依本案發明精神所作之 等效修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 [0031] 第一圖係先前技術之一種背光模組之俯視圖。 [0032] 第二圖係先前技術之另一種背光模組之立體結構示意圖 〇 [0033] 第三圖係先前技術之又一種背光模組之立體結構示意圖 〇 [0034] 第四圖係本發明第一實施例之背光模組之立體結構示意 圖。 [0035] 第五圖係本發明第二實施例之背光模組之立體結構示意 圖。 [0036] 第六圖係本發明第三實施例之背光模組之立體結構示意 圖。 【主要元件符號說明】 [0037] 背光模組：40，50，60 [0038] LED點光源·· 41，51，61 [0039] 導光板：42，52，62 [0040] 反光罩：43，53，63 094124902 表單編號A0101 第11頁/共17頁 0993387442-0 13372771331277 October 27, 099, the replacement of the page, the invention: [Technical Field] [0001] The present invention relates to a light guide plate and a backlight module using the same, and more particularly to an edge-lit backlight module group. [Prior Art] [0002] Due to its advantages of lightness, thinness, and low power consumption, liquid crystal displays are widely used in modern information devices such as notebook computers, mobile phones, and personal digital assistants. Since the liquid crystal in the liquid crystal display itself has no light-emitting characteristics, in order to achieve the display effect, the liquid crystal display panel needs to provide a light source device, such as a backlight module, whose function is to provide a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel. [0003] The backlight module can be divided into an edge-lit backlight module and a direct-lit backlight module according to the structure. Referring to FIG. 1 , the prior art edge-lit backlight module 10 includes a light source 11 and a light guide plate 12 , and the light source 11 is adjacent to the light incident surface 122 of the light guide plate 12 . Among them, the light guide plate 12 is generally made of a transparent material such as polyacryl acrylate (PMMA) or polycarbonate (PC). The light source 11 employs a plurality of light emitting diodes (LEDs). Alternatively, a Cold Cathode Fluorescent Lamp (CCFL) can be used. [0005] At present, a small-sized backlight module uses a single or a plurality of LEDs as a light source; a large-size backlight module uses a CCFL as a light source. Compared with CCFL, LED has the advantages of long life, beautiful color and high reliability. The CCFL contains mercury, so LEDs also have significant advantages in environmental protection. Therefore, as technology advances, L E D will become a trend as a light source. 094124902 Form No. A0101 Page 4 of 17 0993387442-0 1337277 October 27 & Replace! ^ I [(10) 〇], using the LED as the light source 11 of the backlight module 1 〇, the light guide plate 12 is close to the light source 11 area is prone to the light column bright area 丨 4, and the light guide plate corresponding to the part between the LED is easy to appear shadow District 16. This phenomenon is called the light column phenomenon, which greatly reduces the luminous uniformity of the light guide plate. In order to improve the uniformity of light emission of the light guide plate, the prior art adopts a design of forming various microstructures on the light incident surface of the light guide plate. [0008] Please refer to the second figure, which is a backlight module 2〇 in the prior art. The backlight module 20 includes a plurality of LED point light sources 21 and a light guide plate 22, and includes a light source 21 adjacent to the LED. The light surface 222 is provided with a plurality of sawtooth prism structures 224 corresponding to the LED point light source 21 . [0009] Please refer to the third figure, which is another backlight module 30 in the prior art. The backlight module 30 includes a plurality of LED point light sources 31 and a light guide plate 32, and includes a light source 31 adjacent to the LED. a light surface 322 corresponding to the LED point light source 31 is provided with a plurality of tapered and other grooving structures 324 〇 [0010] The light incident surface microstructure of the backlight modules 20 and 30 (the sawtooth prism structure 224) Or tapered or other grooving structure 324) - to a certain extent, the phenomenon of the light column can be eliminated, but the groove spacing of the above microstructure is about several hundred micrometers, and the microstructure size is small, which is not suitable for the simplification of the mold design & [0011] In view of the above, it is necessary to provide a light guide plate that simplifies the mold design and eliminates the phenomenon of entering the light beam by simplifying the design of the entrance surface microstructure, and the backlight module using the light guide plate. SUMMARY OF THE INVENTION [0012] In the following, a number of embodiments will be described by simplifying the entrance surface microstructure setting 094124902 Form No. A01D1 Page 5 / Total 7 Page 0993387442 Ό I33J277 October 27, 2017 Revision Replacement Page A light guide plate that simplifies mold design and ensures uniformity of light emission, and a backlight module using the light guide plate. [0013] In order to achieve the above, a light guide plate is provided, comprising: a light incident surface, a light emitting surface connected to the light incident surface, and a bottom surface opposite to the light emitting surface, wherein the light incident surface is provided with at least one convex surface. a groove or a plurality of reflective films formed on the surface of the protrusion or groove. [0014] Preferably, the protrusion comprises a triangular cylinder, a hemispherical cylinder or an aspheric cylinder arranged in a direction perpendicular to the axial direction of the light incident surface. [0015] Preferably, the groove comprises a triangular cylinder groove, a hemispherical cylinder groove or an aspheric cylindrical groove disposed along an axial direction of the light incident surface. 1毫米。 [0016] Preferably, the length of the groove or the groove along the entrance surface of the length of the range of 1. 7~5. 1 mm. [0017] Preferably, the multilayer reflective film is formed by alternating two materials of high and low refractive index, wherein each film has an optical thickness of one quarter of a certain visible wavelength. [0018] In order to achieve the above, a backlight module is provided, comprising: a light guide plate, comprising a light incident surface, a light emitting surface connected to the light incident surface, and a bottom surface opposite to the light emitting surface; At least a light source adjacent to the light incident surface, the light incident surface being provided with a single protrusion or groove corresponding to the point light source, and a multilayer reflective film formed on the surface of the protrusion or the groove; and at least one reflective The cover is adjacent to and encloses the point source for reflecting part of the light entering the light guide. [0019] Compared with the prior art, the light guide plate of the present embodiment has 094124902 form number A0101 page 6/17 pages 0993387442-0 1337277, according to the light-incident surface of the embodiment, ____ October 27, 1999, according to the structure of the replacement page is simple a protrusion or groove of appropriate size, and the protrusion or groove is plated with a plurality of reflective films, and the light-emitting surface protrusion or groove structure of the light guide plate is closely matched with the plurality of LED point light sources, and the LED point light source is close to The light intensity of the smooth surface is appropriately reduced due to the cooperation of the convex or groove structure and the multilayer reflective film, that is, by controlling the convex or groove structure and selecting a multilayer reflective film material having an appropriate reflectance, the beam entering guide can be appropriately controlled. The intensity of the light of the light plate, thereby eliminating the appearance of the light column entering the light surface; and, at the light entrance surface corresponding to the light source, replacing the microstructure with a small size and a small size by a single protrusion or groove having a larger size, The light guide plate mold design of the embodiment is simplified. Therefore, the light guide plate of the embodiment and the backlight module using the light guide plate can obtain better light emission uniformity. [Embodiment] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. [0021] Referring to the fourth embodiment, a first embodiment of the present invention provides a backlight module 40, which includes a plurality of LED point light sources 41, a light guide plate 42, and a plurality of reflectors 43. The light guide plate 42 includes a light incident surface 422, a light exit surface 425 connected to the light incident surface 422, and a bottom surface 426 opposite to the light exit surface 425. The light incident surface 422 is provided with protrusions arranged in a plurality of cycles. 424, the protrusion 424 is a triangular column disposed along the axial direction of the light incident surface 422, and protrudes outwardly from the light incident surface 42. A surface of each of the protrusions 424 forms a multilayer reflective film (not shown). ). Each of the LED point light sources 41 is correspondingly adjacent to each of the projections 424. Each of the reflectors 43 has a substantially parabolic curved surface, the bottom end of the parabolic curved surface is adjacent to each of the LED point light sources 41, the curved surface faces each of the LED point light sources 41, and the plurality of reflective masks 43 are connected to each other for maximum reflection. Part of the light re-enters the light guide plate 42 to improve light utilization. 094124902 Form No. A0101 Page 7 of 17 0993387442-0 [0022] I October 27, 099 is made of metal material with four (4) reflection characteristics and heat dissipation characteristics, such as steel, silver, etc. metal. The radii of the illuminating surface 422 is an isosceles triangle having a bottom angle of less than or equal to 10 degrees, and the length of the bottom edge of the light incident surface 422 is 1. 7 5. 1 mm. The distance between the point of the leD point source 41 and the apex of the protrusion 424 is 丨.7 mm. The distance between the reflector 43 and the LED point source 41 is 5 mm. The light guide plate 42 of the embodiment is a flat type. The height of the light guide plate 42 is 〇. 7-1. 5 mm. [0023] The multilayer reflective film is alternately vapor-deposited from two materials of high and low refractive index such that the optical thickness of each film is one quarter of a certain visible wavelength. In the case of appropriately selecting a material having a suitable refractive index, the coherence enhancement of various reflected waves by interference makes the multilayer reflective film have high reflectance. Wherein, the refractive index of the high refractive index material ranges from 2 to 2.4, which may be selected from the group consisting of titanium oxide (Τ, 〇5), cerium oxide (Ti〇3), oxidized sharp (Nb〇x) or pentoxide. New (Ta2〇p; low refractive index material having a refractive index range of 1. 4-1. 6, which may be selected from cerium oxide (Si〇2) or aluminum oxide (A1 〇). The titanium antimonide is used as the high refractive index material and the ceria is used as the low refractive index material. The reflectance of the multilayer reflective film of the embodiment ranges from 40 to 70%, and correspondingly, the transmittance ranges from 3 to 60. [0024] When the backlight module 40 of the embodiment is used, the LED point light source 41 emits a light beam that is unevenly distributed, and the beam intensity of the LED point light source 41 toward the protrusion 424 is large. Under the cooperation of the reflective film, the light beam is partially reflected back to the LED point light source 41 or the reflector 43, and the intensity of the light entering the light guide plate 42 is effectively reduced, so that the light intensity is near the non-convex 094124902. Form No. A0101 0993387442-0 8 pages / a total of 17 pages 1337277 From October 27, 099, roughly equivalent 'to eliminate the light beam In addition, the reflected light beam can be further recycled. In this embodiment, an appropriate beam reflectance can be selected by controlling the convex structure and the multilayer reflective film material having different refractive indices. [0025] Please refer to the fifth figure. The second embodiment of the present invention provides a backlight module 5A, which includes a plurality of LED point light sources 51, a light guide plate 52, and a plurality of reflectors 53. The backlight module 50 of this embodiment is substantially the same as the first embodiment, and is different. The structure of the protrusion 524 formed on the light incident surface 522 of the light guide plate 52 is a semicircular body disposed in the axial direction of the light incident surface 522, which is outwardly from the light incident surface 52. Extendingly protruding, a surface of each of the protrusions 524 is formed with a multi-layered reflective film (not shown). The semicircle of the protrusion 524 is straightened to be equal to the bottom edge of the first embodiment. In addition, the protrusion 524 is also < [0026] Referring to a sixth embodiment, a third embodiment of the present invention provides a backlight module 6A, which includes a plurality of LED point light sources 61, a light guide plate 62, and a plurality of reflective leathers 6 3 ^ backlight module 6 of this embodiment 0 is substantially the same as the second embodiment, except that the plurality of grooves 624 are periodically arranged in the octagonal surface 622 of the light guide plate 62. The semi-circular body is arranged in the vertical direction along the light-incident surface 622. The plurality of grooves 624 are formed inwardly from the light incident surface 62, and a multilayer reflective film (circular not shown) is formed on the surface of each of the grooves 624. The radius of the groove 624 is equal to the radius of the second embodiment, and the LED dots are The distance between the light source 61 and the groove bottom of the groove 624 is about 毫米7 mm. The distance between the reflector 63 and the LED 舜 light source 61 is 5 mm. In addition, the four slots 624 are also formed by a suitable aspherical curved projection or a triangular concave recess as described in the first embodiment. 094124902 Form No. A0101 Page 9 / Total π Page 0993387442-0 1337277 October 27, 099 Nuclear Replacement Page [0027] It can be understood that the distance between the point source of the present invention and the protrusion or groove of the light incident surface of the light guide plate According to different light sources, the number of light sources and the size of the light-incident surface of the light guide plate, such as the width of the light-incident surface of the light guide plate is W and five LED point light sources, the apex of the convex or concave surface of the light-emitting surface and The spacing between the bottoms of the grooves can preferably be W/10. Similarly, if a single LED point source is used, the distance between the apex or the bottom of the protrusions or grooves of the LED point source and the entrance surface can preferably be W/2. [0028] It can be understood that the light guide plate of the present invention can also be provided with various microstructures on the light emitting surface and the bottom surface to further improve the overall optical performance of the light guide plate and the backlight module using the light guide plate. The light guide plate of the present invention can also adopt a two-phase corresponding light-incident surface design, and is combined with a corresponding plurality of point light sources and a reflector to form a backlight module. In addition, the reflector of the backlight module of the present invention can also adopt a reflector to cover the design of a plurality of point sources, and the reflector can also adopt a curved surface having a certain curvature. [0029] The light guide plate of the embodiment has a simple structure and a proper size of protrusions or grooves due to the light incident surface thereof, and the protrusion or the groove is plated with a plurality of reflective films, and the light guide plate is incident on the light surface or the groove When the structure is closely matched with the plurality of LED point light sources, the light intensity of the LED point light source close to the light incident surface is appropriately reduced due to the cooperation of the convex or groove structure and the multilayer reflective film, that is, by controlling the convex or groove structure And selecting a multi-layer reflective film material with appropriate reflectivity, the light intensity of the light beam entering the light guide plate can be appropriately controlled, thereby eliminating the light column image of the light incident surface; and, at the light incident surface corresponding to the light source, a single protrusion having a larger size Or the groove replaces the complex small-sized microstructure used in the prior art, so that the light guide plate mold design of the embodiment is simplified. Therefore, the light guide plate of the present embodiment and the backlight module using the light guide plate can obtain better 094124902 Form No. Λ0101 Page 10/Total 17 Page 0993387442-0 13372.77 _ October 27, 2017, the uniform optical characteristics of the page replacement . [〇〇3〇] In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0031] The first figure is a top view of a backlight module of the prior art. [0032] The second figure is a schematic view of a three-dimensional structure of another backlight module of the prior art. [0033] The third figure is a three-dimensional structure diagram of another backlight module of the prior art. [0034] The fourth figure is the first aspect of the present invention. A schematic diagram of a three-dimensional structure of a backlight module of an embodiment. [0035] The fifth drawing is a schematic perspective view of a backlight module of a second embodiment of the present invention. [0036] FIG. 6 is a perspective view showing a perspective structure of a backlight module according to a third embodiment of the present invention. [Main component symbol description] [0037] Backlight module: 40, 50, 60 [0038] LED point light source · 41, 51, 61 [0039] Light guide plate: 42, 52, 62 [0040] Reflector: 43, 53,63 094124902 Form No. A0101 Page 11 of 17 0993387442-0 1337277
099年10月27日按正替換WOctober 27, 099, replace W
[0041] 入光面：422，522，622 [0042] 凸起：424，524 [0043] 出光面：4 2 5 [0044] 底面：426 [0045] 凹槽：624 0993387442-0 094124902 表單編號A0101 第12頁/共17頁[0041] Light-incident surface: 422, 522, 622 [0042] Raised: 424, 524 [0043] Light-emitting surface: 4 2 5 [0044] Bottom surface: 426 [0045] Groove: 624 0993387442-0 094124902 Form No. A0101 Page 12 of 17