200938888 九、發明說明： 【發明所屬之技術領域】 特別是指一種具有分區 本發明是有關於一種導光板， 梯度之導光板。 【先前技術】 ::液晶顯示器是藉由背光模組提供光源，依光源之 入光方式’背光模組可區分為直下式人光與側向式入光等 兩種’ __向式人光m模組需搭配使科光板以 使點光源成為能在正視角發光之面光源。 參閱圖1，為現有-種適用於側向式入光之背光模組5 的導光板6 ’該背光模組5包含—與該導光板6對應之光源 51’及依序#置於該導光板6之—下擴散片52、二菱鏡片 53與一上擴散片54 ’該導光板6包含-光出射面61，及複 數與該光出射面61相反設置之微結構62。當該光源5ι產 生之複數光束511分別與該等微結構62接觸而折射出該導 光板6後，該等光束511依序經由該下擴散片52、該等菱 鏡片53與該上擴散片54而將行進方向導至正視角，並降 低半功率全角，以提供後續液晶模組有較集中的光可以使 用。 但由於上述導光板6需配合光學膜片才能將該等光束 511的行進方向導至正視角，如此將使得整個背光模組5的 成本增加，且該等光束511經由光學膜片後的光形分佈較廣 ’半功率全角約為50度（如圖2所示），因此，該等光束 511之集中效果仍有待改進。 〇 ❹ 200938888 【發明内容】 因此，本發明之-目的即在提供—種可降低背光模組 成本的具有分區梯度之導光板。 本發明之另-目的即在提供一種可降低光束之半功率 全角的具有分區梯度之導光板。 於是，本發明具有分區梯度之導光板’是適用於改變 由一先源產生之複數光束的光路，並包含—本體、複數第 一凹槽與第二凹槽’及複數第-導光區與第二導光區。 该本體包括間隔設置之一出光面與一反射面，及一連 接該出光面與反射面且與該光源相對應之入光面。 該等第一凹槽是凹設於該本體之出光面。 該等第二凹槽是凹設於該本體之反射面，且沿一平行 該出光面與反射面的光軸方向 j砰通寻第一凹槽呈交錯設置 〇 延柚： 冑光區包括複數由該出光面往該入光面傾斜 延伸且分別與該等第— 道上广 價相鄰之第—迎光面，每一第二 導先區包括複數由該反射面 .. 遠離該入光面之方向傾斜延 _且分別與該等第二凹槽相 #由八， h相郇之第一迎光面，藉此，該等 ί束分別於該等第-、第二迎光面產生全反射後，實質上 是往垂直該光軸之方向折射出該出光面。 藉由該等凹槽之設置， 光而省略光學膜片的_ ^了使該等光束在正視角發 還可降低折射出該出光 、之成本外 【實施方式】 之Μ料功率全角。 200938888 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之三個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。200938888 IX. Description of the invention: [Technical field to which the invention pertains] In particular, it relates to a type having a partition. The present invention relates to a light guide plate and a gradient light guide plate. [Prior Art]: The liquid crystal display is provided by the backlight module. According to the light source of the light source, the backlight module can be divided into two types: direct-type human light and lateral light-in type. The m module needs to be matched with the light board so that the point source becomes a surface light source that can emit light at a positive viewing angle. Referring to FIG. 1 , there is a light guide plate 6 ′ for a backlight module 5 that is suitable for lateral light entering. The backlight module 5 includes a light source 51 ′ corresponding to the light guide plate 6 and a guide # placed in the guide. The light plate 6 - the lower diffusion sheet 52 , the second lens 53 and the upper diffusion sheet 54 ' the light guide plate 6 includes a light exit surface 61 and a plurality of microstructures 62 disposed opposite the light exit surface 61. After the plurality of light beams 511 generated by the light source 51 are respectively in contact with the microstructures 62 to refract the light guide plate 6, the light beams 511 sequentially pass through the lower diffusion sheet 52, the diamond lens 53 and the upper diffusion sheet 54. The direction of travel is guided to a positive viewing angle, and the full power of the half power is reduced to provide a more concentrated light for subsequent liquid crystal modules. However, since the light guide plate 6 needs to be matched with the optical film to guide the traveling direction of the light beams 511 to a positive viewing angle, the cost of the entire backlight module 5 is increased, and the light shape of the light beams 511 after passing through the optical film is increased. The wide distribution 'half power full angle is about 50 degrees (as shown in Figure 2), so the concentrated effect of these beams 511 still needs to be improved. 〇 ❹ 200938888 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a light guide plate having a partition gradient that reduces the cost of a backlight module. Another object of the present invention is to provide a light guide plate having a partition gradient that reduces the full power of the half power of the beam. Thus, the light guide plate having a partition gradient of the present invention is adapted to change an optical path of a plurality of beams generated by a precursor, and includes a body, a plurality of first grooves and a second groove, and a plurality of first-light guiding regions and The second light guiding area. The body includes a light emitting surface and a reflecting surface disposed at intervals, and a light incident surface that is connected to the light emitting surface and the reflecting surface and corresponding to the light source. The first grooves are recessed on the light emitting surface of the body. The second grooves are recessed on the reflecting surface of the body, and are staggered along a direction parallel to the optical axis of the reflecting surface and the reflecting surface. The first groove is staggered. a second surface of the light-emitting surface that extends obliquely to the light-incident surface and is adjacent to the first-order track, each of the second lead-in areas includes a plurality of reflective surfaces: away from the light-incident surface The direction of the slanting extension _ is respectively opposite to the first illuminating surface of the second groove phase #8, h, respectively, whereby the ί beam is generated on the first and second illuminating surfaces respectively After the reflection, the light exiting surface is substantially refracted in the direction perpendicular to the optical axis. By the arrangement of the grooves, the optical film is omitted, so that the light beams are emitted at a positive viewing angle, and the cost of refracting the light is reduced. [Embodiment] The full power of the data is obtained. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.
參閱圖3〜4c，本發明具有分區梯度之導光板的一第一 較佳實施例是適用於改變由一光源4產生之光束的光路， 並包含一本體1、複數第一凹槽20與第二凹槽3〇、三個第 一導光區21、22、23，及三個第二導光區31、32、％，在 本實施例中，該光源4是一白光LED, 2〇mA的電源供應下 約可發出3_71m ’半功率全角為丨2〇。。 該本體1包括間隔設置之一出光面〖丨與―反射面12, 及一連接諸出光面u與反射面12且與該光源4相對應之入 光面13。 〇等第一凹槽20是凹設於該本體出光面u。 一、，該等第二凹槽30是凹設於該本體1之反射面12且沿 一平行該出光面U與反射面12的光軸L方向和該二 凹槽20呈交錯設置。 每-第—導絲21、22、23包括複數由該本體工之出 :第往該入光® 13傾斜延伸且分別與該等第-凹槽 往該^面―Γ光面^、^，，及複數由該出光面^ ^认先面傾斜延伸且分別與該等第一迎光面2ιι、如 31相連之第一背光面2 211、221、川、 232 ’ W第-迎光面 为別與該出光面11界定出複數第一夾角α1 7 〇 ❹ 200938888 α2、α3,且分別與該等第一 圍界定出該等第—_ Ι”,^2、222、232包 之角度分佈是往遠離該入光面13夹角:1、m3 中，該等第—迎光面211、221、231^=本實施例 222、232皆為平而今雄 ”第—背光面212、 白為千面，該等第一央角α1、 分別為46.5。、50。盘μ。、 α ' α 3的角度 231 與第—背光面 n 232 面 211、221、 別為H、5。與15。。 232間之夹角㊀卜^⑺分 母第二導光區h、32 射面η 4、去 3匕括複數由該本體1之反 2在遠離該入光面13 第- 之方向傾斜延伸且分別與該等 ==相鄰之第二迎光面311、321，，及複數由 往遠離該入光面13之方向傾斜延伸且分別與 及寺第一迎光面311、± 仍… 川321、331相連之第二背光面312、 、332，該等第二迎去 12 1一山# 先面311、321、33丨分別與該反射面 2界U複數第二夾“卜^们，且分別與該等第二 312、322 ' 332包圍界定出該等第二凹槽30,該等 第-夾角石卜以…之角度分佈是往遠離該入光面Μ 之方向遞增’在本實施例中，該等第二迎光面川、⑵、 331與第二背光面312、322、332皆為平面，該等第二夾角 万2 $ 3的角度分別為123。、130。與136.5。，相連接 之第二迎光面311、321、331與第二背光面312、m、332 間之夹角Φ1、Φ2、Φ3分別為93。、8〇。與％。。 圖3〜6中各項參數整理如下列各表所示： 200938888 H3 H4 0.01 0.01Referring to Figures 3 to 4c, a first preferred embodiment of the light guide plate having a partition gradient is adapted to change the optical path of the light beam generated by a light source 4, and includes a body 1, a plurality of first grooves 20 and Two recesses 3〇, three first light guiding regions 21, 22, 23, and three second light guiding regions 31, 32, %. In this embodiment, the light source 4 is a white LED, 2 mA The power supply can be issued about 3_71m 'half power full angle is 丨2〇. . The body 1 includes a light-emitting surface 丨 and a reflecting surface 12, and a light-incident surface 13 connected to the light-emitting surface u and the reflecting surface 12 and corresponding to the light source 4. The first groove 20 is recessed on the light exiting surface u of the body. 1. The second recesses 30 are recessed in the reflecting surface 12 of the body 1 and are disposed in a staggered direction along the optical axis L parallel to the light emitting surface U and the reflecting surface 12 and the two recesses 20. Each of the -first guide wires 21, 22, 23 includes a plurality of the body members: the first light guides 13 are obliquely extended and respectively associated with the first groove to the surface - the light surface, ^, And the first backlight surface 2 211, 221, Chuan, 232 'W first-light-view surface which is obliquely extended by the light-emitting surface and which is respectively connected to the first light-incident surface 2ιι, such as 31 Do not define a complex first angle α1 7 〇❹ 200938888 α2, α3 with the illuminating surface 11 and define the first _ Ι ′′ with the first circumference, respectively, and the angular distribution of the ^2, 222, 232 packets is Along from the angle of the light-incident surface 13: 1, m3, the first - the illuminating surface 211, 221, 231 ^ = this embodiment 222, 232 are flat and now male" - the backlight surface 212, white is thousands The first central angle α1 is 46.5. 50. Disk μ. The angle 231 of α ' α 3 and the first surface 211 and 221 of the backlight surface n 232 are not H or 5. With 15. . The angle between the 232 is a ^ (7) the denominator, the second light guiding area h, 32, the surface η 4, and the third part of the body 1 are inclined by the opposite side of the body 1 in a direction away from the light-emitting surface 13 - and respectively The second illuminating surfaces 311, 321 adjacent to the ==, and the plural are obliquely extended away from the light incident surface 13 and respectively associated with the temple first illuminating surface 311, ± still... 321 331 connected to the second backlight surface 312, 332, the second welcoming 12 1 yishan # first surface 311, 321, 33 丨 respectively with the reflective surface 2 U plural second folder "b, and respectively Enclosing the second grooves 30 with the second 312, 322 ' 332, the angular distribution of the first-angled stones is increasing in a direction away from the light-incident surface ' in the embodiment. The second illuminating surface, (2), 331 and the second backlight surface 312, 322, 332 are all planes, and the angles of the second angles of 20,000 are respectively 123., 130. and 136.5. The angles Φ1, Φ2, and Φ3 between the second illuminating faces 311, 321, 331 and the second backlight faces 312, m, 332 are respectively 93, 8 〇, and %. Parameter sorting Each column of the table below: 200938888 H3 H4 0.01 0.01
光轴t圖牦所示’當該光源4產生之複數光束41分別與該 一 L之夾角是介於〇。〜5。間聘，該等光束41將進入該第 盥光區21與第二導光區31，且分別於該第一迎光面211 '、&光面311處產生全反射後，實質上是往垂直該光軸 IT方向折射出該本體1之出光面U，亦即在正視角之方 。光如圖4b、4c所示，當該光源4產生之複數光束42 、、/3與該光轴1^之夾角是介於广15。與15。〜45。間時，該等 ❹ ^ 43將分別進入該等第一導光區22、23與第二導 光區32、33,進人該等第—導光區22、23之該等光束42 ❹ 、43分別在該等第—迎光面22卜231產生全反射後而往垂 直該光軸L之方向折射出該出光面u，而進人該等第二導 先區3 2、3 3之該笼出击/ q 等先束42、43將於該反射面12產生反射 後’再分別於該第二迎光面321、331產生全反射而往垂直 该光軸L之方向折射出該出光面u。 配合參_ 5’說明本第一較佳實施例材質為pMMA( 聚^基丙雜W，折射率為149)時，該等光束Μ, 、43通過後之光形分佈圖，由圖5中可看出，在不使用任 何光光學膜^兄下’通過本第—較㈣施例之該等光 200938888 束41、42、43的半功率全角為約& 15。，相較於光束通過 現有導光板與光學膜片的半功率全角為5〇度，本較佳實施 例之半功率全角明顯降低，亦即光形分佈較窄。 參閱圖3〜4c、6,本發明之一第二較佳實施例之結構大 致與上述第—較佳實施例相同’其與上述第—較佳實施例 之差異在於下表之各項參數不同： a β Φ θ a 1-45.5 β 1=135 Φ 1=90 «1=0.5 Gi 2-47.5 'β 2=127.5 Φ 2=75 Θ2^2ΐ ' d 3-52.5 β 3 = 112.5 Φ 3=45 «3=7.5 ❾ 叫 今、步一平乂住貫施例與上述第一較十 實施例相同’在不使用任何光光學膜片之狀況下，通㈤ 第二較佳實施例之該等光束41、42、43的半功 為Ν’同樣可達到與上述第-較佳實施例相同之功效。一 參閱圖3〜4c、7，本發明之一第三較 致與上述第一鲂估杳地，，丄 m、、·〇構> ❹ 之… 實施例相同’其與上述第-較佳實❹ 之差異在於下表之各項參數不同：The optical axis t is shown in the figure ′ when the angle of the complex beam 41 generated by the light source 4 and the L is 〇. ~5. The light beam 41 will enter the first light-emitting region 21 and the second light-guiding region 31, and after total reflection is generated at the first light-incident surface 211 ', & the light surface 311, substantially Vertically, the optical axis IT direction reflects the light exit surface U of the body 1, that is, on the side of the positive viewing angle. As shown in Figures 4b and 4c, when the light source 4 produces a complex beam 42, / / 3 and the optical axis 1 ^ is between the width 15. With 15. ~45. During the interval, the ❹ 43 will enter the first light guiding regions 22, 23 and the second light guiding regions 32, 33 respectively, and the light beams 42 进 entering the first light guiding regions 22, 23, 43 after the total reflection of the first-on-the-sun surface 22 231 and refracting the light-emitting surface u in the direction perpendicular to the optical axis L, and entering the second guiding regions 3 2, 3 3 After the front beams 42 and 43 are reflected by the reflecting surface 12, the second reflecting surfaces 321 and 331 respectively generate total reflection and refract the light emitting surface in the direction perpendicular to the optical axis L. . Referring to the reference _ 5', the first preferred embodiment of the present invention is characterized in that the material is pMMA (poly-properylene W, refractive index is 149), and the light beam profile after passing through the beams Μ, 43 is as shown in FIG. It can be seen that the half-power full angle of the beams 41, 42, 43 of the light 200938888 by the first-fourth embodiment is not <15> Compared with the full power of the light beam passing through the existing light guide plate and the optical film of 5 degrees, the half power full angle of the preferred embodiment is significantly reduced, that is, the light shape distribution is narrow. Referring to Figures 3 to 4c, 6, the structure of a second preferred embodiment of the present invention is substantially the same as that of the above-described preferred embodiment. The difference from the above-described preferred embodiment is that the parameters of the following table are different. : a β Φ θ a 1-45.5 β 1=135 Φ 1=90 «1=0.5 Gi 2-47.5 'β 2=127.5 Φ 2=75 Θ2^2ΐ ' d 3-52.5 β 3 = 112.5 Φ 3=45 «3=7.5 今 今 、 、 步 步 施 施 施 施 施 施 施 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在The half work of 42 and 43 is the same as that of the above-described first preferred embodiment. Referring to Figures 3 to 4c, 7, a third aspect of the present invention is the same as the first one described above, and 丄m, 〇 & & 实施 实施 实施The difference between the two is that the parameters in the table below are different:
-------- 由圖7中可看出， 述第-較佳實施㈣ 《-較佳貫_同樣可達心 錢實_彳目同之功效，在不 之狀況下，通過本筮-鉍从— U尤尤子f 的丰功車入Si第一較佳貫施例之該等光束41、42 的+功率全角為約為15。。 10 200938888 歸納上述，本發明藉㈣槽2〇、3〇的設 =產生與該光轴L不同夹角之該等光束41、二由: 其等對應的該等第—導光區21、22、23與第二導光 二第Η時’可分別在該等第-迎光面2U、221、 之方Μ 面311、321、331產生全反射進而在正視角 ❹ :向'光，如此，除了可省略光學媒片的使用而降低背 二成本外，還可使該等光束mi折射出該本 ^之出光面11的半功率全㈣低，故確實能達到發明之 惟以上所述者，僅為本發明之較佳實施例而已，當不 以此限定本發明實施之範圍’即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修都，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一光路示意圖’說明複數光束於現有-種背光 模組之行進情形； 圖2是一光形分佈圖’說明該等光束通過該背光模组 後之光形分佈； 圖3是-側視圖，說明本發明具有分區梯度之導光板 的一第一較佳實施例之構造； 圖4a〜4c皆為局部放大示意圖，說明複數光束分別於複 數第-導光區與第二導光區產生全反射時之情形·， 圖5是-光形分佈圖，說明該等光束通過該第一較佳 實施例後之光形分佈； 11 200938888-------- As can be seen from Figure 7, the first-best implementation (four) "-------------------------------------------------------------------------------------------------------------------------- The + power full angle of the beams 41, 42 of the first preferred embodiment of the 筮-铋 from - U Youzi f into the Si preferred embodiment is about 15. . 10 200938888 In summary, the present invention uses the (4) slots 2〇, 3〇 to generate the beams 41, which are at different angles to the optical axis L, and the corresponding light-conducting regions 21, 22 , 23 and the second light guide 2nd '" can respectively generate total reflection on the first - illuminating surface 2U, 221, the square faces 311, 321, 331 and then in the positive viewing angle ❹: toward the 'light, so, except The use of the optical medium can be omitted to reduce the cost of the back side, and the half-power of the light-emitting surface 11 of the light beam mi can be made low (four), so that it can achieve the invention described above, only The present invention is not limited to the scope of the invention, and the simple equivalent changes and modifications made in accordance with the scope of the invention and the description of the invention are still patents of the present invention. Within the scope of coverage. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an optical path illustrating the traveling of a plurality of beams in a conventional backlight module; FIG. 2 is a light distribution diagram illustrating the distribution of light beams after passing through the backlight module. 3 is a side view showing the structure of a first preferred embodiment of the light guide plate having a partition gradient according to the present invention; and FIGS. 4a to 4c are partially enlarged schematic views showing that the plurality of light beams are respectively in the complex first light guiding region and The case where the second light guiding region is totally reflected. FIG. 5 is a light distribution diagram illustrating the light shape distribution of the light beams after passing through the first preferred embodiment; 11 200938888
❹ 圖6是一光形分佈圖，說明複數光束通過本發明具有 分區梯度之導光板的一第二較佳實施例之光形分佈；及 圖7是一光形分佈圖，說明複數光束通過本發明具有 分區梯度之導光板的一第三較佳實施例之光形分佈。 12 200938888Figure 6 is a light-shaped distribution diagram illustrating a light-shaped distribution of a second preferred embodiment of a light guide plate having a partitioned gradient of the present invention; and Figure 7 is a light-shaped distribution diagram illustrating the passage of a plurality of light beams A light shape distribution of a third preferred embodiment of a light guide plate having a partition gradient is invented. 12 200938888
【主要元件符號說明】 1 ....... …本體 312....... 第二背光面 11…… …出光面 32......... 第二導光區 12…… …反射面 321 ....... 第二迎光面 13…… —入光面 322 ....... 第二背光面 20…… …第一凹槽 33......... 第二導光區 21…… …·第一導光區 331 ....... 第二迎光面 21 卜... …·苐 迎光面 332 ....... 第二背光面 212… •…第一背光面 4 .......... 光源 22···.. •…第一導光區 41〜43 — 光束 221… •…第一迎光面 d2〜d4 — 長度 222… •…第一背光面 D1〜D4… 長度 23••… …·第一導光區 H1 〜H4··· 南度 231… …·第一迎光面 L.......... 光轴 232… —第 背光面 αΐ〜α3 — 第一夾角 30···.· •…第二凹槽 β1〜β3 — 第二夾角 31 ·..·· …·第二導光區 Θ卜Θ3 ·.·. |夾角 311… …·第二迎光面 φ \ ~ φ 3 * * * •夾角 13[Description of main component symbols] 1. . . . body 312....... second backlight surface 11 ... ... light exit surface 32......... second light guide region 12 ......reflective surface 321 ....... second illuminating surface 13...-lighting surface 322....... second backlight surface 20...first groove 33.... ..... second light guiding area 21 ... .... first light guiding area 331 ....... second light illuminating surface 21 卜... 苐 光 面 332 ..... .. 2nd backlight surface 212... •...first backlight surface 4 ..... light source 22···.. •...first light guiding area 41 to 43 — light beam 221... Brightness surface d2~d4 — length 222... •...first backlight surface D1~D4... length 23••...·first light guiding area H1~H4··· South degree 231...·first light surface L .......... Optical axis 232... - First backlight surface αΐ~α3 — First angle 30······...Second groove β1~β3 — Second angle 31 ·..·· ...·The second light guiding area Θ卜Θ3 ···. |The angle 311... The second front surface φ \ ~ φ 3 * * * • The angle 13