200804924 * . . ... - '. . ..-· ··· - . .· ..... ' . · . - ；' ^ . ... -. . ； · .... 九、發明說明: ； .. - . ..···. . 【發明所屬之技術領域】 • - - . . ; .. ... . .；...... ;.；. 本發明係有關一種背光模組，尤其係指一種可均勻出光之背光模 • — . .. . 組0 ... . . -. 【先前技術】 近年來，由於發光二極體的發光效率不斷提升，使得發光二極體 - . * ·. . .... 在某些領域已漸漸取代日光燈與白熱燈泡，例如液晶顯示器使用之背 , ^ 4 ,-圓·,· 圓 ^ 光模組係以發光二極體作為光源。光源在背光模組内常見的配置方式 . … ... ..... 有直下式(direct type)及側光式(Side-edge)兩種。直下式背光模組 疋將光源置於液晶面板的正下方，側光式背光模組是將光源放在液晶 面板下方側邊。 請參閱圖1，習知背光模組1〇包含一殼體16、多數個發光二極體 光源11、反射片15、一擴散板12及一光學材料層13。其中光源η . ； . . 以陣列方式等距排設於殼體16内，反射片15係貼設於殼體16内表面 馨 以將光源11提供之光線反射至擴散板12，擴散板12為一平板型擴散 板，擴散板12與光學材料層13係依序配置於光源n的上方，用以使 光源11提供之光線可均勻地出光。 然發光二極體光源11其中心點之輝度最強，自中心點呈同心圓輻 -’ . 射狀往外輝度逐漸降低，一般邊緣之輝度約為中心點輝度的一半，然 光線經擴散板12之作用後，中心點仍會較亮，使得背光模組無法均勻 地出光。目前解決之方式，係利用增加擴散板12的整體厚度，加強分 200804924 散光線之效果’以提升岀光均勻性，但此將會造成成本、錄 及整體厚度增加。 ^ 【發明内容】 本發明之—目的’係提供—婦光模組，可提升點光源出光之均 勻性。 * . . · . - ' . . [ ' - · • ' ... , .. ... . . 為達上述目的，本發明之背光模組包含_殼體、複數個點光源、 -擴散板以及複數個凸起之勻光單元;其中，複數個點光源係以陣列 方式設置於殼體内，且每一點光源具有一第一中心，擴散板設置於該 二點光源之上方’碰個凸起之勻光單元細陣财式設置於擴散板 朝向賊源之表面上，且每—勻光單祕與每—點光源相對應，透過 勻光單元之設置可將點光源巾光強度最強之巾心光束均勻分散後出 光，達到提升出光之均勻度。 【實施方式】 請參關2’本發明背光模組1〇〇包含一殼體1〇6、至少—點光 源101以及-擴散板1〇2。點光源1〇1係以陣列方式配置於_搬 内點光源101可為發光二極體。擴散板1〇2設置於光源之上方， 用以將點光源101之光線均勻化後出光，且擴散板1〇2面向點光源肌 之表面服上設置至少-6起之⑽單元1G3，每―皱單元⑽係 與每一點光源101相對應，意即每一點光源101係設置於相對應之句 光單TO 1G3之正下方’且勻光單元1Q3係以陣列方式設置於擴散板搬 上。請參關3 ’凸起之勻光單元1〇3包含一平貼於擴散板搬上之連 200804924 . - · ..:- · · · . · -• . . . · · . · - · .· ··.，-· . · · · · . . - ' - * .- ' .. . . . - - -. ..圓- r . ' · · · .. . - *- .--. - ...;...' . ,'： ' . ' · ·...' · - . ；· .； - · _ . .. . . : ... . 、. ...-..；- ..-.. . ...:..:.... .. . ...... . ... " ；- ' ... . . · --. .... 接面1031及一包覆連接面l〇3l之弧面1032。點光源1〇i具有一第一 中心Q1，勻光單元103具有一第二中心Q2 ,其中，第二中心Q2係位 於第一中心Q1之正上方，第一中心见為點光源1〇1出米最強之位置， 第二中心Q2為勻光單元103的幾何中心，勻光單元1〇3最接近點光源 之點係位於第一中心Q1與第二中心q2的連線上。請參閱圖3所示， 本貫施例中，勻光單το 103之連接面1〇31係呈一圓形，且圓形之圓心 _ 係位於第一中心Q1與第二中心q2的連線上。勻光單元1〇3例如可與 擴散板102以一體成形的方式製作。另外，勻光單元1〇3與擴散板1〇2 之接觸面積（即連接面之面積）約可等同於點光源1〇1照射於擴散板 102上之面積。其中，勻光單元1〇3可為半圓球形或角錐形結構。 - : _ - 本實施例賊發光二減做制。從點絲1G1巾^點射出之光 束為-第―光束L1(即輝度最強之光束)，從點光源IN邊緣射出之第 二光束L2 ’且第二光束L2之光強度約為第一光束u之一半。其中， • 兩側之第二光束L2所失之夾角為半光強角八，於半光強角A内之發光 區域即為點光源101主要出光的部分。光源1〇1於半光強角A範圍内 之光雜過弧面凸起之奸單元⑽後概程度加劇，也就是說，較 強光線透過勻光單元1〇3後，有更強之光線散射效果，將較強光線均 勻化後出光。 此外，本發明將擴散板1〇2上句光單元1〇3之第二中心收對準光 源' 101之第-中心Q1之正上方設置，係為使光源1〇1出光最強的中心 200804924 ' . · - - . . . . . . : . .... . - ... . " · -. ; ... . ‘ .. ..- ：... .. .......- '… · ' ...' ："； '.：： . ·- · -：-.·： -：； ·ν-- ' ：. , -；,. . -.: . .... ； . ' - ' .... ..-. . , _ ' - ' . . · ·. ； .； ' ... 點部分有最佳之光均句效果，其中勻光軍元103内更可設置多數擴散 粒子104,且勻光單元103之弧面凸起程度可因應設計需求，而有不同: 之曲率半徑。最佳地’可依點光源m之出雜度分佈來設計^ 面凸起程度與光源101之出光輝度成正比。 本發明之背光模組利甩於擴散板朝肖光源之表面上均句設置孤面 凸起之勻解元，可_祕光献最私h絲吻分散後出光。200804924 * . . . - '. . . . . . . . . DESCRIPTION OF THE INVENTION: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A backlight module, in particular, a backlight module capable of uniformly emitting light. - . . . . Group 0 . . . -. [Prior Art] In recent years, due to the continuous improvement of the luminous efficiency of the light-emitting diode, the light is emitted. Diodes - . * ·. . . . In some areas, it has gradually replaced fluorescent lamps and incandescent bulbs, such as the back of liquid crystal displays, ^ 4 , - round ·, · round ^ optical module with light-emitting diode The body acts as a light source. The light source is commonly arranged in the backlight module. ..... There are two types of direct type and side-edge type. Direct-type backlight module 疋 Place the light source directly under the LCD panel. The edge-lit backlight module places the light source on the lower side of the LCD panel. Referring to FIG. 1, a conventional backlight module 1A includes a housing 16, a plurality of LED light sources 11, a reflection sheet 15, a diffusion plate 12, and an optical material layer 13. The light source η . . . is arranged in an array in an equidistant manner in the housing 16 , and the reflective sheet 15 is attached to the inner surface of the housing 16 to reflect the light provided by the light source 11 to the diffusion plate 12 , and the diffusion plate 12 is A flat diffuser, the diffuser 12 and the optical material layer 13 are sequentially disposed above the light source n for uniformly emitting light from the light source 11. However, the luminance of the center point of the light-emitting diode source 11 is the strongest, and the concentric circle-' from the center point is gradually reduced. The luminance of the outer edge is gradually reduced, and the luminance of the general edge is about half of the luminance of the center point, and the light passes through the diffusion plate 12. After the action, the center point will still be brighter, so that the backlight module cannot emit light uniformly. The current solution is to increase the thickness of the diffuser 12 by increasing the overall thickness of the diffuser 12 to enhance the uniformity of the light, but this will result in an increase in cost, recording and overall thickness. ^ SUMMARY OF THE INVENTION The present invention provides a maternity module that enhances the uniformity of light output from a point source. * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . And a plurality of raised light-storing units; wherein the plurality of point light sources are arranged in an array in the housing, and each point light source has a first center, and the diffusion plate is disposed above the two-point light source The uniformity unit of the homogenizing unit is arranged on the surface of the diffusing plate facing the thief source, and each of the uniform light secrets corresponds to each of the light sources, and the light source of the point light source is strongest through the setting of the light homogenizing unit. After the towel beam is evenly dispersed, the light is emitted to achieve uniformity of light emission. [Embodiment] Please refer to 2'. The backlight module 1 of the present invention comprises a casing 1〇6, at least a point light source 101 and a diffusion plate 1〇2. The point light source 1〇1 is arranged in an array, and the point source 10 can be a light emitting diode. The diffuser plate 1〇2 is disposed above the light source for equalizing the light of the point source 101 to emit light, and the diffusing plate 1〇2 faces the surface of the point source muscle to set at least -6 (10) units 1G3, each ― The wrinkle unit (10) corresponds to each of the point light sources 101, that is, each point light source 101 is disposed directly under the corresponding sentence sheet TO 1G3' and the leveling unit 1Q3 is disposed in an array on the diffusion sheet. Please refer to the 3' raised uniform light unit 1〇3 including a flat attached to the diffuser board. 200808424. - · ..:- · · · · · · · · · · · · · · · · · ···,·· . · · · · . . - ' - * .- ' .. . . . - - - . . . circle - r . ' · · · .. . - *- .--. - ...;...' . , ': ' . ' · ·...' · - . ;· .; - · _ . . . . . : . . . , . .-..; - ..-.. . ...:..:.... .. ...................";- ' ... . . · --. .... The surface 1031 and a curved surface 1032 covering the connecting surface 103a. The point source 1〇i has a first center Q1, and the leveling unit 103 has a second center Q2, wherein the second center Q2 is located directly above the first center Q1, and the first center is seen as a point source 1〇1 The strongest position of the meter, the second center Q2 is the geometric center of the leveling unit 103, and the point of the leveling unit 1〇3 closest to the point source is located on the line connecting the first center Q1 and the second center q2. Referring to FIG. 3, in the present embodiment, the connection surface 1〇31 of the uniform light single το 103 is a circle, and the center of the circle _ is located at the connection between the first center Q1 and the second center q2. on. The light homogenizing unit 1〇3 can be produced, for example, integrally with the diffusion plate 102. Further, the contact area of the light-homogenizing unit 1〇3 and the diffusion plate 1〇2 (i.e., the area of the connection surface) may be equivalent to the area of the point light source 1〇1 irradiated on the diffusion plate 102. Wherein, the light homogenizing unit 1〇3 may be a semi-spherical or pyramidal structure. - : _ - In this embodiment, the thief emits two light reductions. The light beam emitted from the dot 1G1 towel point is the -th light beam L1 (i.e., the light beam having the strongest luminance), the second light beam L2' emitted from the edge of the point light source IN, and the light intensity of the second light beam L2 is about the first light beam u Half of it. The angle between the two light beams L2 on both sides is a half-light intensity angle eight, and the light-emitting area in the half-light intensity angle A is the portion where the point light source 101 mainly emits light. When the light source 1〇1 is in the range of the half-light intensity angle A, the light is mixed with the raised surface of the arc unit (10), that is, the stronger light passes through the leveling unit 1〇3, and there is stronger light. The scattering effect equalizes the strong light and emits light. In addition, the present invention sets the second center of the sentence light unit 1〇3 of the diffuser plate 1〇2 directly above the first center Q1 of the light source '101, and is the center that makes the light source 1〇1 the strongest light 200804924' · - - . . . . . : . . . . - ... . " · -. ; ... . ' .. ..- :... .. ...... .- '... · ' ...' :"; '.:: . ·- · -:-.·: -:; ·v-- ' :. , -;,. . -.: . .. .. ; . ' - ' .... ..-. . , _ ' - ' . . · ·. ; .; ' ... The point has the best light uniform effect, which is uniform light military 103 A plurality of diffusing particles 104 may be disposed therein, and the degree of convexity of the arc surface of the light homogenizing unit 103 may be different according to design requirements: a radius of curvature. The optimum degree can be designed to be proportional to the light intensity of the light source 101 according to the distribution of the noise of the point source m. The backlight module of the invention is advantageous for the uniform solution of the solitary surface convex on the surface of the diffusing plate facing the Xiao light source, and the light can be dispersed after the most private h silk kiss.
以上所述，僅用以方便說明本發明之梅實施例，本發明之範圍 不限於該等較佳實施例，凡依本發騎做的任何變更，於不脫離本發 明之精神下，皆屬本發明申請專利範圍。 【圖式簡單說明】 圖1係習知直下式背光模組之側視圖。 周2係本發明背光模組之側視圖。 圖3係本發明背光模組之擴散板之示意圖。 【號說明】 -——--- ~」' ~ ~ 直下式背光模組 11 -~—~—— 發光二極體光源 ——— 12 '-----— 擴散板 13 ττ—^. 光學材料層 —— 15 --- ~------ 反射片 16 ~---—^ 殼體 _---—^_ 200804924The above is only to facilitate the description of the present invention, and the scope of the present invention is not limited to the preferred embodiments, and any changes made by the present invention are not departing from the spirit of the present invention. The scope of the patent application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of a conventional direct type backlight module. Week 2 is a side view of the backlight module of the present invention. 3 is a schematic view of a diffusion plate of a backlight module of the present invention. [Note] -——--- ~"' ~ ~ Direct-type backlight module 11 -~-~—— Light-emitting diode light source———— 12 '------ Diffusion plate 13 ττ-^. Optical material layer - 15 --- ~------ Reflective sheet 16 ~----^ Housing _----^_ 200804924
ϊοο 背光模組 101 點光源 r . . .. ： . . . .圓 102 擴散板 1021 表面 103 勻光單元 1031 連接面 1032 弧面 104 擴散粒子 106 殼體 Q1 第一中心 Q2 第二中心 LI 第一光束 L2 第二光束 A 半光強角Ϊοο Backlight module 101 Point source r . . . . : . . . : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Beam L2 second beam A half intensity angle