1373636 六、發明說明： 採用該稜鏡片之背光模組及 【發明所屬之技術領域】 本發明係關於一種棱鏡片 液晶顯示裝置。 【先前技術】 近年來，液晶顯示裝置因整體輕薄、占用 射小等優點，被廣泛用於監視器、液晶電視、；：二二1373636. Description of the Invention: A backlight module using the same and a technical field of the invention The present invention relates to a prism sheet liquid crystal display device. [Prior Art] In recent years, liquid crystal display devices have been widely used in monitors and LCD TVs due to their overall slimness and small footprint.
ΐί領域，逐漸成為顯示產品的主流。液晶顯示 ί以ί模Ϊ晶顯示面板及一為該液晶顯示面板提供 一=參閱圖1，係一種先前技術液晶顯示裝置之立體分 解=意圖。該液晶顯示裝置丨包括一液晶顯示面板u及一 與該液晶顯示面板11相鄰之背光模組12。 、 該背光模組12包括一導光板13、一反射片14、一光 源15、一擴散片16及一稜鏡片17。該導光板13包括一入 光，131、一與該入光面131相鄰之出光面132及一與哕 出光面132相對之底面133。該光源15鄰近該導光板、^ 之入光面131設置。該反射片14鄰近該導光板13之底面 133，置。該擴散片16鄰近該導光板13之出光面ΐ3ι設 置。該稜鏡片17設置於該擴散片16遠離該導光板13之二 側’且夾於該擴散片16與該液晶顯示面板U之間。 該光源15發出之光束沿該入光面13ι進入該導光板 13 。^伤光束直接由該出光面132導出’另一部份光束 由該底面133洩出經該反射片14反射後再由該出光面132 導出。該擴散片16將該導光板13之出光面132導出之光 ^均勻擴散後，提供給該棱鏡片17。該稜鏡片17將該擴 散片16射出之光束轉化為方向比較集中之高輝度光束^ it供給遠液晶顯不面板1 1。 請一併參閲圖2 ,係該稜鏡片17之立體示意圖。該稜 3 1373636 鏡片17鄰近該液晶顯示面板11 一側具有複數集光單元 170。該複數集光單元170之截面呈鋸齒形，且該複數集光 '單元170沿同一預定方向依序設置且相互平行。自該擴散 • 片16射出之光束經過該複數集光單元170時，因其稜鏡對 光束具有匯集作用，使得提供給該液晶顯示面板11之光束 之方向比較集中、輝度較高。 惟，由於該背光模組12僅具一擴散片16,經過該稜 鏡片17匯集後再提供至該液晶顯示面板11之光束可能不 能滿足該液晶顯示面板11對均勻度較高之需要；若該背光 模組12進一步增加一擴散片，對該棱鏡片17射出之光束 • 進行擴散，勢必增加該背光模組12及液晶顯示裝置1之厚 度及成本。 【發明内容】 有鑑於此，提供一種可提高出光輝度及均勻度之稜鏡 片實為必要。 同時，提供一種出光均勻度較高之背光模組實為必要。 同時，提供一種採用上述背光模組之液晶顯示裝置亦 為必要。 一種稜鏡片，該棱鏡片之一表面具有複數集光單元， m 該集光單元包括複數出光表面，其中，該出光表面具有複 β數光擴散微結構。 一種背光模組，其包括一稜鏡片，該稜鏡片之一表面 • 具有複數集光單元，該集光單元包括複數出光表面，其中， 該出光表面具有複數光擴散微結構。 一種液晶顯示裝置，其包括一液晶顯示面板及一與該 液晶顯示面板相鄰之背光模組，該背光模組包括一稜鏡 片，該棱鏡片之一表面具有複數集光單元，該集光單元包 括複數出光表面，該出光表面具有複數光擴散微結構。 相較於先前技術，本發明棱鏡片、使用該棱鏡片之背 光模組及液晶顯示裝置中，由於該集光單元之表面具有複 4 1373636 數光擴散微結構，使光束在方向集中、輝度提高之同時亦 擴散，保證提供至液晶顯示面板之光束之出光輝度及均勻 * 度，該稜鏡片之出光輝度及均勻度較高，該背光模組之出 1 光均勻度較高，並且亦未增加該背光模組及液晶顯示裝置 之厚度及成本。 【實施方式】 請參閱圖3,係本發明液晶顯示裝置之立體分解示意 圖。該液晶顯示裝置2包括一液晶顯示面板21及一與該液 晶顯示面板21相鄰之背光模組22。 該背光模組22包括一導光板23、一反射片24、一光 • 源25、一擴散片26及一稜鏡片27。該導光板23包括一入 光面231、一與該入光面231相鄰之出光面232及一與該 出光面232相對之底面233。該光源25鄰近該導光板23 之入光面231設置。該反射片24鄰近該導光板23之底面 233設置。該擴散片26鄰近該導光板23之出光面231設 置。該稜鏡片27設置於該擴散片26遠離該導光板23之一 側，且夾於該擴散片26與該液晶顯示面板21之間。 該光源25發出之光束沿該入光面231進入該導光板 23，一部份光束直接由該出光面232導出，另一部份光束 由該底面233洩出經該反射片24反射後再由該出光面232 導出。該擴散片26將該導光板23之出光面232導出之光 ' 束均勻擴散後，提供給該稜鏡片27。該稜鏡片27將該擴 散片26射出之光束轉化為方向比較集中之高輝度光束之 同時亦將該光束擴散，再提供給該液晶顯示面板21。 請一併參閱圖4及圖5，圖4係該棱鏡片27之立體示 意圖，圖5係圖4沿IV-IV方向之剖面示意圖。該棱鏡片 27鄰近該液晶顯示面板21 —側之表面具有複數集光單元 270。該複數集光單元270之截面呈鋸齒形。其中，每一集 光單元270係一條形稜鏡，其包括二底邊271、一頂邊273 及該二底邊271與該頂邊之間之二出光表面272，該二出 5 1373636 光表面272具有複數點狀之微結構2721。該複數微結構 2721係複數半球型之凹槽，其大小一致且均勻分佈於該出 光表面272，進而使該集光單元270之二出光表面272凹 凸不平而形成可使光束向多個方向擴散之粗糙面。 自該擴散片26射出之光束經過該複數集光單元270 時，由於稜鏡對光束具有匯集作用，該光束之方向將比較 集中，輝度提高。然而，該集光單元270之出光表面272 之複數微結構2721進一步使該光束在輝度提高之同時亦 擴散，進而該稜鏡片27可提供輝度較高且均勻度較高之光 束至該液晶顯示面板21。 相較於先前技術，本發明液晶顯示裝置2中，由於該 稜鏡片27之集光單元270之出光表面272具有複數微結構 2721，使得該集光單元270之出光表面272凹凸不平，進 而使光束在輝度提高之同時亦有較高之均勻度，該稜鏡片 27之出光輝度及均勻度較高，該背光模組22之出光均勻 度較高，並且亦未增加該背光模組21及液晶顯示裝置2之 厚度及成本。 請參閱圖6,係本發明液晶顯示裝置第二實施方式之 稜鏡片之剖面示意圖。該稜鏡片37與第一實施方式之稜鏡 片27大致相同，其主要區別在於：複數微結構3721係複 數半球型之凸起。 請參閱圖7,係本發明液晶顯示裝置第三實施方式之 棱鏡片之立體示意圖。該稜鏡片47與第一實施方式之稜鏡 片27大致相同，其主要區別在於：複數集光單元470之表 面472之微結構4721之分佈密度沿自底邊471向頂邊473 之方向逐漸增大。由於稜鏡之鄰近該頂邊473之部份對光 束之匯集作用較鄰近其底邊471之部份對光束之匯集作用 強，導致該棱鏡片47之出光均勻度較低。當用於擴散光束 之微結構4721之分佈密度沿自該底邊471至頂邊473之方 向逐漸增大時，可改善鄰近頂邊473部份與鄰近底邊471 137,3636 部份對光束匯集作用不同而導致光均勻度較低之問題，該 稜鏡片47整體之出光均勻度較高。 請參閱圖8,係本發明液晶顯示裝置第四實施方式之 棱鏡片之立體示意圖。該實施方式之稜鏡片57與第一實施 方式之棱鏡片27之主要區別在於：複數集光單元570係複 數矩陣排佈之稜錐結構，該稜錐包括四出光表面572,該 四出光表面572均為三角形，微結構5721均勻分佈於該四 出光表面572。 本發明背光模組及液晶顯示裝置之棱鏡片亦可具其他 多種變更設計，如：第一實施方式之液晶顯示裝置2中， • 該棱鏡片27之出光表面272之微結構272亦可為間隔分佈 之半球型凹槽或半球型凸起；該凹槽與凸起亦可為圓錐型 或圓柱型；該稜鏡片27亦可用於直下式背光模組、採用直 下式背光模組之液晶顯示裝置及未採用擴散片之背光模組 及液晶顯示裝置。其中，在未採用擴散片之及液晶顯示裝 置中，該稜鏡片設置於該導光板及液晶顯示面板之間。 综上所述，本發明確已符合發明專利之要件，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方 式，本發明之範圍並不以上述實施例為限，該舉凡熟悉本 案技藝之人士援依本發明之精神所作之等效修飾或變化， * 皆應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係一種先前技術液晶顯示裝置之立體分解示意圖。 圖2係圖1所示液晶顯示裝置之稜鏡片之立體示意圖。 圖3係本發明液晶顯示裝置之立體分解示意圖。 圖4係圖3所示液晶顯示裝置之稜鏡片之立體示意圖。 圖5係圖4沿IV-IV方向之剖面示意圖。 圖6係本發明液晶顯示裝置第二實施方式之棱鏡片之剖 面示意圖。 圖7係本發明液晶顯示裝置第三實施方式之棱鏡片之立 7 1373636 體示意圖。 圖8係本發明液晶顯示裝置第四實施方式之棱鏡片之立 體示意圖。 【主要元件符號說明】 液晶顯示裝置 2 液晶顯不面板 背光模組 導光板 反射片 光源 擴散片 稜鏡片 入光面 出光面 底面 集光單元 底邊 出光表面 微結構 頂邊 21 22 23 24 25 26 27 、 37 、 47 、 57 231 232 233 270 、 470 、 570 271 、 471 272 ' 472 ' 572 2721 、 3721 、 4721 、 5721 273 ' 473 8The ΐί field has gradually become the mainstream of display products. The liquid crystal display is provided with a crystal display panel and a liquid crystal display panel is provided. Referring to Fig. 1, a stereoscopic decomposition of the prior art liquid crystal display device is intended. The liquid crystal display device 丨 includes a liquid crystal display panel u and a backlight module 12 adjacent to the liquid crystal display panel 11. The backlight module 12 includes a light guide plate 13, a reflective sheet 14, a light source 15, a diffusion sheet 16, and a cymbal sheet 17. The light guide plate 13 includes an incident light 131, a light exit surface 132 adjacent to the light incident surface 131, and a bottom surface 133 opposite to the light exit surface 132. The light source 15 is disposed adjacent to the light incident surface 131 of the light guide plate. The reflection sheet 14 is disposed adjacent to the bottom surface 133 of the light guide plate 13. The diffusion sheet 16 is disposed adjacent to the light exit surface ΐ3 of the light guide plate 13. The cymbal sheet 17 is disposed on the two sides of the diffusion sheet 16 away from the light guide plate 13 and sandwiched between the diffusion sheet 16 and the liquid crystal display panel U. The light beam emitted by the light source 15 enters the light guide plate 13 along the light incident surface 13ι. The injured beam is directly led out of the light-emitting surface 132. The other portion of the light beam is discharged from the bottom surface 133 and reflected by the reflection sheet 14 and then led out from the light-emitting surface 132. The diffuser 16 uniformly diffuses the light which is led out from the light exit surface 132 of the light guide plate 13, and supplies the light to the prism sheet 17. The cymbal sheet 17 converts the light beam emitted from the diffusion sheet 16 into a high-intensity light beam which is relatively concentrated in a direction to be supplied to the far-crystal display panel 1 1. Please refer to FIG. 2 together, which is a perspective view of the cymbal 17. The rib 3 1373636 lens 17 has a plurality of light collecting units 170 adjacent to the liquid crystal display panel 11 side. The plurality of light collecting units 170 have a zigzag cross section, and the plurality of light collecting units 170 are sequentially disposed in the same predetermined direction and parallel to each other. Since the light beam emitted from the diffusion sheet 16 passes through the plurality of light collecting units 170, the light beam having a collecting effect is concentrated, so that the direction of the light beam supplied to the liquid crystal display panel 11 is concentrated and the luminance is high. However, since the backlight module 12 has only one diffusion sheet 16, the light beam that is collected by the cymbal sheet 17 and then supplied to the liquid crystal display panel 11 may not satisfy the requirement for the uniformity of the liquid crystal display panel 11; The backlight module 12 further adds a diffusion sheet, and the light beam emitted from the prism sheet 17 is diffused, which increases the thickness and cost of the backlight module 12 and the liquid crystal display device 1. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a sheet which can improve the brightness and uniformity. At the same time, it is necessary to provide a backlight module with high uniformity of light output. At the same time, it is also necessary to provide a liquid crystal display device using the above backlight module. A ruthenium sheet having a plurality of light collecting units on a surface thereof, wherein the light collecting unit comprises a plurality of light emitting surfaces, wherein the light emitting surface has a complex β light diffusing microstructure. A backlight module includes a cymbal sheet having a surface of a plurality of light collecting units, the light collecting unit including a plurality of light emitting surfaces, wherein the light emitting surface has a plurality of light diffusing microstructures. A liquid crystal display device includes a liquid crystal display panel and a backlight module adjacent to the liquid crystal display panel, the backlight module includes a cymbal sheet having a plurality of light collecting units on a surface thereof, the light collecting unit A plurality of light exiting surfaces are included, the light exiting surface having a plurality of light diffusing microstructures. Compared with the prior art, in the prism sheet of the present invention, the backlight module using the prism sheet, and the liquid crystal display device, since the surface of the light collecting unit has a complex light diffusion microstructure of 4 1373636, the light beam is concentrated in the direction and the brightness is improved. At the same time, it also spreads to ensure the brightness and uniformity of the light beam supplied to the liquid crystal display panel. The brightness and uniformity of the light output of the film are high, and the light uniformity of the backlight module is high and has not increased. The thickness and cost of the backlight module and the liquid crystal display device. [Embodiment] Please refer to Fig. 3, which is a perspective exploded view of a liquid crystal display device of the present invention. The liquid crystal display device 2 includes a liquid crystal display panel 21 and a backlight module 22 adjacent to the liquid crystal display panel 21. The backlight module 22 includes a light guide plate 23, a reflective sheet 24, a light source 25, a diffusion sheet 26, and a cymbal sheet 27. The light guide plate 23 includes a light incident surface 231, a light exit surface 232 adjacent to the light incident surface 231, and a bottom surface 233 opposite to the light exit surface 232. The light source 25 is disposed adjacent to the light incident surface 231 of the light guide plate 23. The reflection sheet 24 is disposed adjacent to the bottom surface 233 of the light guide plate 23. The diffusion sheet 26 is disposed adjacent to the light exit surface 231 of the light guide plate 23. The cymbal sheet 27 is disposed on one side of the diffusion sheet 26 away from the light guide plate 23, and is sandwiched between the diffusion sheet 26 and the liquid crystal display panel 21. The light beam emitted by the light source 25 enters the light guide plate 23 along the light incident surface 231, and a part of the light beam is directly led out from the light exit surface 232, and another portion of the light beam is discharged from the bottom surface 233 and reflected by the reflective sheet 24, and then The light exit surface 232 is derived. The diffuser 26 uniformly diffuses the light beam which is led out from the light exit surface 232 of the light guide plate 23, and is supplied to the cymbal sheet 27. The cymbal sheet 27 converts the light beam emitted from the diffusion sheet 26 into a high-intensity light beam having a relatively concentrated direction while diffusing the light beam, and supplies the light beam to the liquid crystal display panel 21. 4 and FIG. 5, FIG. 4 is a perspective view of the prism sheet 27, and FIG. 5 is a cross-sectional view taken along line IV-IV of FIG. The surface of the prism sheet 27 adjacent to the side of the liquid crystal display panel 21 has a plurality of light collecting units 270. The plurality of light collecting units 270 have a zigzag cross section. Each of the light collecting units 270 is a shape 稜鏡, which includes two bottom edges 271, a top edge 273, and two light-emitting surfaces 272 between the two bottom edges 271 and the top edge, and the two light-emitting surfaces 272 272 has a plurality of dot-like microstructures 2721. The plurality of micro-structures 2721 are grooves of a plurality of hemispherical shapes, which are uniform in size and evenly distributed on the light-emitting surface 272, so that the light-emitting surfaces 272 of the light-collecting unit 270 are uneven and formed to diffuse the light beam in multiple directions. Rough surface. When the light beam emitted from the diffusion sheet 26 passes through the plurality of light collecting units 270, since the light beam has a collecting action, the direction of the light beam will be concentrated and the luminance will be improved. However, the plurality of microstructures 2721 of the light-emitting surface 272 of the light-collecting unit 270 further diffuse the light beam while the luminance is increased, and the silicon wafer 27 can provide a light beam with higher luminance and higher uniformity to the liquid crystal display panel. twenty one. Compared with the prior art, in the liquid crystal display device 2 of the present invention, since the light-emitting surface 272 of the light collecting unit 270 of the cymbal 27 has a plurality of microstructures 2721, the light-emitting surface 272 of the light-collecting unit 270 is uneven, thereby making the light beam The luminance is improved and the uniformity is high. The brightness and uniformity of the enamel film 27 are relatively high. The uniformity of the light output of the backlight module 22 is high, and the backlight module 21 and the liquid crystal display are not added. The thickness and cost of the device 2. Referring to Fig. 6, there is shown a cross-sectional view of a cymbal sheet of a second embodiment of the liquid crystal display device of the present invention. The cymbal sheet 37 is substantially the same as the cymbal sheet 27 of the first embodiment, and the main difference is that the plurality of microstructures 3721 are ridges of a plurality of hemispherical shapes. Referring to Fig. 7, a perspective view of a prism sheet of a third embodiment of the liquid crystal display device of the present invention is shown. The cymbal sheet 47 is substantially the same as the cymbal sheet 27 of the first embodiment, the main difference being that the distribution density of the microstructures 4721 of the surface 472 of the plurality of concentrating units 470 gradually increases from the bottom side 471 toward the top side 473. . Since the portion of the ridge adjacent to the top edge 473 is more effective in collecting the light beam than the portion adjacent to the bottom edge 471, the prism sheet 47 has a lower uniformity of light output. When the distribution density of the microstructure 4721 for diffusing the beam gradually increases from the bottom edge 471 to the top edge 473, the adjacent top edge 473 portion and the adjacent bottom edge 471 137, 3636 portion can be improved. The effect of the difference in light results in a low uniformity of light, and the overall uniformity of light output of the cymbal sheet 47 is high. Referring to Fig. 8, a perspective view of a prism sheet of a fourth embodiment of the liquid crystal display device of the present invention is shown. The main difference between the cymbal sheet 57 of this embodiment and the prism sheet 27 of the first embodiment is that the plurality of light collecting units 570 are pyramidal structures of a plurality of matrix arrangements, and the pyramids include four light emitting surfaces 572, and the four light emitting surfaces 572 All of them are triangular, and the microstructures 5721 are evenly distributed on the four light-emitting surfaces 572. The prism sheet of the backlight module and the liquid crystal display device of the present invention may have various other modifications. For example, in the liquid crystal display device 2 of the first embodiment, the microstructure 272 of the light-emitting surface 272 of the prism sheet 27 may also be spaced. a distributed hemispherical groove or a hemispherical protrusion; the groove and the protrusion may also be a conical or cylindrical type; the cymbal 27 may also be used for a direct type backlight module, a liquid crystal display device using a direct type backlight module And a backlight module and a liquid crystal display device that do not use a diffusion sheet. In the liquid crystal display device in which the diffusion sheet is not used, the cymbal is disposed between the light guide plate and the liquid crystal display panel. 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 the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or variations in accordance with the spirit of the present invention. * All should be covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective exploded view of a prior art liquid crystal display device. 2 is a perspective view of a cymbal of the liquid crystal display device shown in FIG. 1. 3 is a perspective exploded view of a liquid crystal display device of the present invention. 4 is a perspective view of a cymbal of the liquid crystal display device shown in FIG. 3. Figure 5 is a schematic cross-sectional view of Figure 4 taken along the line IV-IV. Fig. 6 is a cross-sectional view showing a prism sheet of a second embodiment of the liquid crystal display device of the present invention. Fig. 7 is a schematic view showing the body of a prism sheet of the third embodiment of the liquid crystal display device of the present invention. Fig. 8 is a schematic perspective view showing a prism sheet of a fourth embodiment of the liquid crystal display device of the present invention. [Main component symbol description] Liquid crystal display device 2 Liquid crystal display panel backlight module Light guide plate Reflector light source diffuser film 入 light entrance surface light surface bottom light collection unit bottom edge light surface microstructure top edge 21 22 23 24 25 26 27 , 37 , 47 , 57 231 232 233 270 , 470 , 570 271 , 471 272 ' 472 ' 572 2721 , 3721 , 4721 , 5721 273 ' 473 8