201124772 六、發明說明： 【發明所屬之技術領域】 [0001]本發明係有關於一種背光模組及應用該背光模組的液晶 顯示襄置。 【先前技術】 _2]近年來’液晶顯不裝置因具備體積輕薄、佔用空間小、 輕射小等優點’逐漸估據了顯示產品的主流。在液晶顯 不裝置中，液晶面板本身不發光，而是由背光模組為其 提供發光均勻的平面光。 .. :......201124772 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a backlight module and a liquid crystal display device using the same. [Prior Art] _2] In recent years, the liquid crystal display device has been gradually estimated to be the mainstream of display products due to its advantages of being light in size, small in space, and light in light. In the liquid crystal display device, the liquid crystal panel itself does not emit light, but the backlight module provides uniform planar light for illumination. .. :......
[〇〇〇3] 背光模組通常包括先學膜’ α u宇膠片組、導光板、光源、光源反 射罩。該導光板包括-出光面及-與該出光面相鄰的入 光面光源反射罩收各該光源並置於導光板入光面一側 ’光源反射罩的邊緣搭接於導光板出光面邊緣。該光學 膜片組貼附於該導光板的出光面一側。 [0004][〇〇〇3] The backlight module usually includes a film mask, a light guide plate, a light source, and a light source reflector. The light guide plate includes a light-emitting surface and a light-incident light source reflecting cover adjacent to the light-emitting surface, and the light source is disposed on the light-incident surface of the light guide plate. The edge of the light-emitting reflector overlaps the edge of the light-emitting surface of the light guide plate. The optical film group is attached to the light-emitting surface side of the light guide plate. [0004]
大部分 該發光二極體發出的光經過該導光板的傳播後 光經過導光板的出光面心。光㈣光學膜片的多次擴 散及匯聚後射_背域組，則該背光模組可發出均句 的平面光。惟，背光模組的各元件材料在製作時都有一 定的公差’致使該光學⑼組的邊緣與光源反射罩邊緣 之間留有4的間隙，由該導光板的出光面射出的光經 該間隙射出而未經過該光學㈣組對光進行擴散與匯聚 ，會導致該背光模組的有間_位置“㈣，進” 響該背光模組的出光的岣勻度與品質。 099100466 【發明内容】 有鑑於此，本發明提供—插 種出光較均勻的背光模組。 表單編號A0101 $ 3頁/共20頁 0992001021-0 [0005] 201124772 [0006] 另，提供一種應用上述背光模組的液晶顯示裝置。 [0007] —種背光模組，其包括光學膜片、導光板、光源和光源 遮蔽罩，該導光板包括出光面、入光面及底面，該底面 與出光面相對設置，該入光面與該底面相鄰設置，該光 學膜片設置在該出光面一側，該光源設置在入光面一側 ，該導光板於出光面鄰近入光面的一側進一步包括向内 凹陷的收容部，該收容部收容部分光源遮蔽罩，光學膜 片邊緣遮蓋該光源遮蔽罩的邊緣。 [0008] 一種液晶顯示裝置，其包括一液晶顯示面板與一背光模 組，該液晶顯示面板與該背光模組層疊設置，該一種背 光模組包括光學膜片、導光板、.光源和光源遮蔽罩，該 導光板包括出光面、入光面及底面，該底面與出光面相 對設置，該入光面與該底面相鄰設置，該光學膜片設置 在該出光面一侧，該光源設置在入光面一側，該導光板 於出光面鄰近入光面的一側進一步包括向内凹陷的收容 部，該收容部收容部分光源遮蔽罩，光學膜片邊緣遮蓋 該光源遮蔽罩的邊緣。 [0009] 與習知技術相比，通過在背光模組中的導光板的入光面 與出光面之間設置收容部，該收容部收容光源遮蔽罩， 使光源遮蔽罩與光學膜片不在同一平面，且光學膜片遮 蓋該光源遮蔽罩的邊緣，使經過該背光模組射出的全部 光均經過光學膜片組的匯聚與擴散，該背光模組及應用 該背光模組的液晶顯示裝置出光均勻。 【實施方式】 [0010] 請一併參閱圖1至圖3，圖1係本發明液晶顯示裝置第一實 099100466 表單編號A0101 第4頁/共20頁 099: 201124772 [0011] [0012] θ ❹ [0013] 細》方式的立體分解圖，圖2係圖1所示液晶顯示襄置部分 組裝示意圖，圖3係圖2所示沿Π〗—丨丨丨處的剖面示意圖 〇 液日日顯不裝置1〇〇包括液晶顯示面板1、遮光膠帶3及背光 模組4 ^該液晶顯示面板1與該背光模組4層疊設置。該遮 光膝帶3貼附該液晶面板1與該背光模組4，使該液晶顯示 面板1與該背光模組4位置固定。 該背光模組4包括光學膜片組41、光源組42、中空的膠框 43、導光板44及反射片45 j該膠框43包括首尾相連接的 四側壁（未標巧.）。該光源42包括二點光源421和_條形軟 性印刷電路板422 ’軟性印刷電路板422用於驅動光源 421發光。該二點光源421設置在該條形軟性印刷電路板 422上，其優選為發光二極體光源。也可议根據需要，採 用其他的光源，光源的數量也可以根據需要採用1個或多 個。該點光源421包括一平行該軟性印刷電路;^422的發 光面（未標示），發光面到印刷電路板422的距離為點光源 421的高’該發光面大也為矩形，其包括兩相對的長邊與 兩相對的短邊。 該導光板44包括一底面441、一與該底面441相鄰的入光 面442及一與底面441相對的出光面443。該出光面443的 面積與該液晶顯不面板1的顯示區域的面積相匹配。該導 光板44於出光面443鄰近入光面的一側向内凹陷形成一收 容部（未標示）。優選地，該收容部包括承載面444及垂直 該承載面444的連接面445。該承載面444與該入光面442 垂直且相鄰，該連接面445與該承載面444番直相鄰且與 0992001021-0 099100466 表單编號Α0101 第5頁/共20真 201124772 該入光面442平行。該入光面442、承載面444、連接面 445和該出光面443依序連接形成二級階梯狀結構◊該連 接面445的南度與s玄反射片45的厚度相同或者略高於該反 射片45的厚度。該入光面442高度與該光源421的發光面 的寬度相同或者略高於該光源421的發光面的寬度。該入 光面442高度與該連接面445的高度之和等於該導光板44 的厚度，即與該導光板44的底面441到出光面443的距離 相同。該導光板44通常採用高透過率的樹脂材料製造。 該承載面444具有光擴散功能，其可以通過在該承載面 444上設置高分子化合蛘材料擴散粒子的方式實現，或者 通過在承載面444上設置微結構等方式改變承載面444的 平整度。 [0014] 該光學膜片組41包括擴散片與棱鏡片等光學元件。擴散 片與棱鏡片依次層疊於導光板44的出光面443上。從而， 經出光面443出射的光經過依次經過擴散片與棱鏡片多次 匯聚與擴散後射出該背光模組4，使該背羌模組4的發出 的光更加均勻。该.光學膜片組41的長度大於該導光板44 的出光面443的長度，並且該長出部分至少覆蓋部分該導 光板的承載面444。 [0015] 該反射片45包括一主體（未標示）與一延伸部452。該反射 片45長於該導光板44的底面441的長度，以在長出部分形 成該延伸部4 5 2。該光源4 2的軟性印刷電路板4 2 2設置在 該延伸部452上’以將該光源42固定在該反射片45上。該 反射片45的延伸部452包括三連續設置的一第一連接部 4521、一光源設置部4522及一光源遮蔽罩4523。第一連 099100466 表單編號A0101 第6頁/共20頁 0992001021-0 201124772 接44521與5亥反射片45的主體相連接。該第一連接部 4521的見度（該第一連接部托以與光源設置部“Μ的共 用邊到第-連接部4521與主體的共用邊的距離）大於該 點光源421的高度和該軟性印刷電路板422的厚度之和。 λ光源认置。|54522面積等於或大於軟性印刷電路板422面 積。戎光源遮蔽罩4523的寬度（光源遮蔽罩4523與光源 a又置部4522的共用邊到與該共用邊相對的另一邊的距離 )大於該第一連接部4521的寬度。 〇 [〇〇16]組裝時，該導光板44的底面441設置在該反射片45的主體 上，该反射片45的襄你部452向該導光板44彎折並部分覆 蓋於導光板44的收容部上。其中，該光源設置部4522相 對該第一連接部彎折且與導光板44的入光面442相對設置 ’光源421位於該光源設置部4522與導光板44的入光面 442之間。該光源遮蔽罩4523相對該光珠設置部4522彎 折且該光源遮蔽罩4523部分搭接於該導光板44的收容部 ’即該承載面444上。光源設置部4522正對該導光板44 ❹ 的入光面442，該光源42收容於該第一連接部4521、光 源設置部4522、光源遮蔽罩4523和導光板44入光面442 組成的收容空間内。該點光源421正對該導光板44的入光 面442 ’該點光源421發出的光直接進入該導光板44内部 。該光學膜片組41設置於該導光板44的出光面443的一側 。該光學膜片組41的長出部分遮蓋該反射片45的光源遮 蔽罩4523邊緣，從而由於設計公差導致的空隙被該光學 膜片組41所覆蓋。該膠框43收容該光學膜片組41、光源 組42、導光板44和反射片45 ’進而完成該背光模組4的組 099100466 表單編號Α0101 第7買/共20頁 0992001021-0 201124772 裝。 [0017] 由該點光源421發出的光，通過該導光板44的入光面442 ，在該導光板44的内部進行傳播，大部分光經過導光板 44的出光面443射出；另一部分光經過該反射片45的反射 後於該導光板44内傳播，最終經由該導光板44的出光面 443射出；由該承載面444射出的光分為兩個部分，一部 分經過擴散粒子或者擴散面後由該反射片45的光源遮蔽 罩4523反射回該導光板44，繼續在該導光板44内傳播； 另一部分由經過擴散粒子或者擴散面後射向該光學膜片 組41，經過該光學膜片組41的光學轉換後射出該背光模 組4。 [0018] 因此，在導光板44的入光面442與出光面443之間設置收 容部收容該反射片的光源遮蔽罩4523，使該反射片的光 源遮蔽罩4523與該光學膜片41不在同一個面上，且令該 光學膜片41延長遮蓋該反射片45的光源遮蔽罩4523的邊 緣。光由該反射片45的光源遮蔽罩4523的邊緣到該導光 板44的連接面445的空隙中漏出，經過該光學膜片41的擴 散與匯聚後射出，而不會在局部形成亮線，提升了該背 光模組4的出光均勻度，且由於該反射片的光源遮蔽罩 4523與該光學膜片41不在同一個面上，在不增加模組厚 度的情況下提升該背光模組4的出光均勻度。 [0019] 請參閱圖4至圖6，圖4係本發明液晶顯示裝置第二實施方 式的立體分解圖，圖5係圖4所示液晶顯示裝置部分組裝 示意圖，圖6係圖5所示沿VI - VI處的剖面示意圖。本實施 方式與第一實施方式的不同之處在於：膠框73的其一側 099100466 表單編號A0101 第8頁/共20頁 0992001021-0 201124772 [0020] Ο 〇 [0021] [0022] 099100466 壁設置一條形通孔731。光源組72的軟性印刷電路板722 可在該條形通孔731中自由通過，該軟性印刷電路板722 同時充當光源遮蔽罩。點光源721為侧光式發光。反射片 的延伸部752可彎折充當燈管反射罩，與導光板74的入 光面742及軟性印刷電路板722—起收容該點光源721。 組裝時，該軟性印刷電路板722由該膠框73的内侧通過該 條形通孔731延伸出該膠框73與外部電路電連接；導光板 74的承載面744鄰近該軟性印刷電路板722設置，且在軟 性印刷電路板722與承載面744交疊處設置一雙面膠帶80 ’進而固定該先源組72，入光面742鄰近點光源721設置 ;該反射片75鄰近該導光板74的底面741設置，使導光板 74的底面741附於該反射片75無延伸部752的區域上；該 反射片75的延伸部752向該導光板74的入光面742方向彎 折’則該軟性印刷電路板722、入光面742、反射片75和 延伸部752形成一收容空間收容該點光源κι，可使點光 源721發出的光直接進入該導光板74。 本發明更有其他實悬方式，如光源為條形光源，軟性印 刷電路板為燈管反射罩，再如光源為條形燈管，利用橫 截面為U形的金屬的燈管反射罩包裹並固定該條形燈管， 該燈管反射罩的一側壁代替第一實施方式中的反射片的 光源遮蔽罩充當光源遮蔽罩等。 雖然本發明已以實施例揭露如上，然其並非用以限定本 發明’任何所屬技術領域中具有通常知識者，在不脫離 本發明之精神和範圍内，當可作些許之更動與潤飾，故 本發明之保護範圍當視後附之申請專利範圍所界定者為 表單編號Α0101 第9頁/共20頁 0992001021-0 201124772 準。 【圖式簡單說明】 [0023] 圖1係本發明液晶顯示裝置第一實施方式的立體分解圖。 [0024] 圖2係圖1所示液晶顯示裝置部分組裝示意圖。 [0025] 圖3係圖2所示沿III-III處的剖面示意圖。 [0026] 圖4係本發明液晶顯示裝置第二實施方式的立體分解圖。 [0027] 圖5係圖4所示液晶顯示裝置部分組裝示意圖。 [0028] 圖6係圖5所示沿VI - VI處的示意圖。 【主要元件符號說明】 [0029] 液晶顯示裝置100 [0030] 液晶顯示面板1 [0031] 遮光膠帶3 [0032] 背光模組4 [0033] 光學膜片組41 [0034] 光源組42、72 [0035] 膠框43、73 [0036] 導光板44、74 [0037] 反射片 45、75 [0038] 點光源421、721 [0039] 軟性印刷電路板422、722 0992001021-0 099100466 表單編號A0101 第10頁/共20頁 201124772 [0040]底面441、741 [0041] 入光面442、742 [0042] 出光面443 [0043] 承載面444、744 [0044] 連接面445 [0045] 延伸部452、752 [0046] ❹ [0047] 第一連接部4521 光源設置部4522 [0048] 光源遮蔽罩4523 [0049] 通孔731 [0050] 雙面膠帶80 099100466 表單編號A0101 第11頁/共20頁 0992001021-0Most of the light emitted by the light-emitting diode passes through the light guide plate and passes through the light-emitting face of the light guide plate. The light (four) optical film is repeatedly diffused and concentrated after the radiation_back domain group, the backlight module can emit a uniform plane light. However, the material of each component of the backlight module has a certain tolerance during fabrication, so that a gap of 4 is left between the edge of the optical (9) group and the edge of the light source reflector, and the light emitted from the light exit surface of the light guide plate passes through the light. The gap is emitted without diffusing and converging the light through the optical (four) group, which causes the backlight module to have a position _ position "(4), which affects the uniformity and quality of the light output of the backlight module. SUMMARY OF THE INVENTION In view of the above, the present invention provides a backlight module with a relatively uniform light output. Form No. A0101 $3/20 pages 0992001021-0 [0005] 201124772 [0006] In addition, a liquid crystal display device using the above backlight module is provided. [0007] A backlight module includes an optical film, a light guide plate, a light source, and a light source shielding cover. The light guide plate includes a light emitting surface, a light incident surface, and a bottom surface. The bottom surface is opposite to the light emitting surface, and the light incident surface is opposite to the light emitting surface. The bottom surface is disposed adjacent to the bottom surface of the light-emitting surface, and the light source is disposed on a side of the light-incident surface. The light-guiding plate further includes an inwardly recessed receiving portion on a side of the light-emitting surface adjacent to the light-incident surface. The accommodating portion houses a part of the light source shielding cover, and the edge of the optical film covers the edge of the light source shielding cover. [0008] A liquid crystal display device includes a liquid crystal display panel and a backlight module. The liquid crystal display panel and the backlight module are stacked. The backlight module includes an optical film, a light guide plate, a light source, and a light source. a cover, the light guide plate includes a light-emitting surface, a light-incident surface and a bottom surface, the bottom surface is opposite to the light-emitting surface, the light-incident surface is disposed adjacent to the bottom surface, the optical film is disposed on a side of the light-emitting surface, and the light source is disposed at On the side of the light incident surface, the light guide plate further includes an inwardly recessed receiving portion on a side of the light emitting surface adjacent to the light incident surface, the receiving portion receiving a portion of the light source shielding cover, and the edge of the optical film covering the edge of the light source shielding cover. [0009] Compared with the prior art, a accommodating portion is disposed between the light incident surface and the light emitting surface of the light guide plate in the backlight module, and the accommodating portion receives the light source shielding cover, so that the light source shielding cover and the optical film are not in the same a flat surface, and the optical film covers the edge of the light source shielding cover, so that all the light emitted through the backlight module passes through the optical film group to be concentrated and diffused, and the backlight module and the liquid crystal display device using the backlight module emit light. Evenly. [Embodiment] [0010] Please refer to FIG. 1 to FIG. 3 together. FIG. 1 is a first embodiment of the liquid crystal display device of the present invention. 099100466 Form No. A0101 Page 4 / Total 20 Pages 099: 201124772 [0012] [0012] θ ❹ [0013] FIG. 2 is a schematic exploded view of the liquid crystal display device shown in FIG. 1 , and FIG. 3 is a schematic cross-sectional view along the Π 丨丨丨 丨丨丨 图 图 日 日 日 日 日 日The device 1 includes a liquid crystal display panel 1, a light-shielding tape 3, and a backlight module 4. The liquid crystal display panel 1 and the backlight module 4 are stacked. The liquid crystal panel 1 and the backlight module 4 are attached to the light-shielding knee band 3, and the liquid crystal display panel 1 and the backlight module 4 are fixed in position. The backlight module 4 includes an optical film group 41, a light source group 42, a hollow plastic frame 43, a light guide plate 44, and a reflection sheet 45j. The plastic frame 43 includes four side walls (not labeled) which are connected end to end. The light source 42 includes a two-point light source 421 and a strip-shaped flexible printed circuit board 422'. The flexible printed circuit board 422 is used to drive the light source 421 to emit light. The two-point light source 421 is disposed on the strip-shaped flexible printed circuit board 422, which is preferably a light-emitting diode source. It is also possible to use other light sources as needed, and the number of light sources may be one or more as needed. The point light source 421 includes a light-emitting surface (not labeled) parallel to the flexible printed circuit; the light-emitting surface is at a distance from the printed circuit board 422 to the height of the point light source 421. The light-emitting surface is also rectangular, and includes two opposite sides. The long side is opposite the short side of the two. The light guide plate 44 includes a bottom surface 441, a light incident surface 442 adjacent to the bottom surface 441, and a light exit surface 443 opposite to the bottom surface 441. The area of the light-emitting surface 443 matches the area of the display area of the liquid crystal display panel 1. The light guide plate 44 is recessed inwardly on a side of the light exit surface 443 adjacent to the light incident surface to form a receiving portion (not shown). Preferably, the receiving portion includes a bearing surface 444 and a connecting surface 445 perpendicular to the bearing surface 444. The bearing surface 444 is perpendicular to and adjacent to the light incident surface 442. The connecting surface 445 is directly adjacent to the bearing surface 444 and is 0992001021-0 099100466. Form number Α0101 5th page/total 20 true 201124772 442 parallel. The light-incident surface 442, the bearing surface 444, the connecting surface 445 and the light-emitting surface 443 are sequentially connected to form a two-stage stepped structure. The south degree of the connecting surface 445 is the same as or slightly higher than the thickness of the s-reflecting sheet 45. The thickness of the sheet 45. The height of the light incident surface 442 is the same as or slightly higher than the width of the light emitting surface of the light source 421. The sum of the height of the light incident surface 442 and the height of the connecting surface 445 is equal to the thickness of the light guide plate 44, that is, the distance from the bottom surface 441 of the light guide plate 44 to the light exit surface 443. The light guide plate 44 is usually made of a resin material having a high transmittance. The bearing surface 444 has a light diffusing function, which can be realized by providing a polymerized composite material diffusion particle on the bearing surface 444, or changing the flatness of the bearing surface 444 by providing a microstructure on the bearing surface 444. [0014] The optical film group 41 includes optical elements such as a diffusion sheet and a prism sheet. The diffusion sheet and the prism sheet are sequentially laminated on the light-emitting surface 443 of the light guide plate 44. Therefore, the light emitted through the light-emitting surface 443 is condensed and diffused a plurality of times through the diffusion sheet and the prism sheet, and then emitted to the backlight module 4, so that the light emitted by the cassette module 4 is more uniform. The length of the optical film group 41 is greater than the length of the light-emitting surface 443 of the light guide plate 44, and the elongated portion covers at least a portion of the bearing surface 444 of the light guide plate. [0015] The reflection sheet 45 includes a main body (not shown) and an extension portion 452. The reflection sheet 45 is longer than the length of the bottom surface 441 of the light guide plate 44 to form the extension portion 425 in the elongated portion. A flexible printed circuit board 42 2 of the light source 42 is disposed on the extension 452 to fix the light source 42 to the reflective sheet 45. The extending portion 452 of the reflective sheet 45 includes three first connecting portions 4521, a light source setting portion 4522, and a light source shielding cover 4523. The first connection 099100466 Form No. A0101 Page 6 / Total 20 pages 0992001021-0 201124772 Connected to the main body of the 5th reflection sheet 45. The visibility of the first connecting portion 4521 (the distance between the common connecting side of the first connecting portion and the light source setting portion "to the common side of the first connecting portion 4521 and the main body" is greater than the height of the point light source 421 and the softness The sum of the thicknesses of the printed circuit board 422. The λ light source is recognized. The |54522 area is equal to or larger than the area of the flexible printed circuit board 422. The width of the light source shielding cover 4523 (the light source shielding cover 4523 and the common side of the light source a and the portion 4522 are The distance from the other side of the common side is greater than the width of the first connecting portion 4521. When assembled, the bottom surface 441 of the light guiding plate 44 is disposed on the main body of the reflecting sheet 45. The portion 452 of the 45 is bent toward the light guide plate 44 and partially covers the receiving portion of the light guide plate 44. The light source setting portion 4522 is bent relative to the first connecting portion and the light incident surface 442 of the light guide plate 44. The light source 421 is disposed between the light source setting portion 4522 and the light incident surface 442 of the light guide plate 44. The light source shielding cover 4523 is bent relative to the light ball setting portion 4522 and the light source shielding cover 4523 is partially overlapped with the light guide plate. The accommodating part of 44 The light source setting portion 4522 is adjacent to the light incident surface 442 of the light guide plate 44, and the light source 42 is received in the first connecting portion 4521, the light source setting portion 4522, the light source shielding cover 4523, and the light incident surface 442 of the light guide plate 44. The light source 421 is directly incident on the light incident surface 442 of the light guide plate 44. The light emitted from the light source 421 directly enters the inside of the light guide plate 44. The optical film group 41 is disposed on the light guide plate 44. One side of the surface 443. The elongated portion of the optical film group 41 covers the edge of the light source shielding cover 4523 of the reflective sheet 45, so that the gap due to design tolerance is covered by the optical film group 41. The plastic frame 43 accommodates The optical film group 41, the light source group 42, the light guide plate 44, and the reflection sheet 45' complete the group of the backlight module 4, 099100466, the form number Α0101, the seventh purchase, and the total of 20 pages, 0992001021-0, 201124772. [0017] The light emitted from the point light source 421 passes through the light incident surface 442 of the light guide plate 44 and propagates inside the light guide plate 44. Most of the light is emitted through the light exit surface 443 of the light guide plate 44; the other portion of the light passes through the reflection sheet 45. After being reflected, the light guide plate 44 The light is finally emitted through the light-emitting surface 443 of the light guide plate 44. The light emitted by the bearing surface 444 is divided into two parts, and a part of the light passes through the diffusing particles or the diffused surface, and is reflected by the light-shielding cover 4523 of the reflective sheet 45 back to the guide. The light plate 44 continues to propagate in the light guide plate 44; the other portion passes through the diffusion particles or the diffusion surface and is directed toward the optical film group 41, and is optically converted by the optical film group 41 to emit the backlight module 4. Therefore, a light source shielding cover 4523 that accommodates the reflection sheet is disposed between the light incident surface 442 of the light guide plate 44 and the light output surface 443, so that the light source shielding cover 4523 of the reflection sheet is not the same as the optical film 41. On one side, the optical film 41 is extended to cover the edge of the light source shielding cover 4523 of the reflection sheet 45. The light leaks from the edge of the light source shielding cover 4523 of the reflection sheet 45 to the gap of the connection surface 445 of the light guide plate 44, and is emitted after being diffused and concentrated by the optical film 41, and does not form a bright line locally. The uniformity of the light output of the backlight module 4 is improved, and since the light source shielding cover 4523 of the reflective sheet is not on the same surface as the optical film 41, the light output of the backlight module 4 is increased without increasing the thickness of the module. Evenness. 4 is a perspective exploded view of a liquid crystal display device according to a second embodiment of the present invention, and FIG. 5 is a partial assembly view of the liquid crystal display device shown in FIG. A schematic view of the section at VI-VI. The difference between this embodiment and the first embodiment is that the side of the plastic frame 73 is 099100466, the form number A0101, the eighth page, the total 20 pages, the 0992001021-0, the 201124772 [0020] Ο 〇[0021] [0022] 099100466 wall setting A through hole 731. The flexible printed circuit board 722 of the light source group 72 is free to pass through the strip-shaped through hole 731, which simultaneously functions as a light source shield. The point light source 721 is an edge-lit light. The extending portion 752 of the reflective sheet can be bent to serve as a reflector for the lamp, and the light source 721 of the light guide plate 74 and the flexible printed circuit board 722 can be accommodated. When assembled, the flexible printed circuit board 722 extends from the inner side of the plastic frame 73 through the strip-shaped through hole 731, and the plastic frame 73 is electrically connected to the external circuit; the bearing surface 744 of the light guide plate 74 is disposed adjacent to the flexible printed circuit board 722. And a double-sided tape 80 ′ is disposed at a position where the flexible printed circuit board 722 overlaps the bearing surface 744 to fix the source group 72. The light-incident surface 742 is disposed adjacent to the point light source 721; the reflective sheet 75 is adjacent to the light guide plate 74. The bottom surface 741 is disposed such that the bottom surface 741 of the light guide plate 74 is attached to the region of the reflection sheet 75 having no extension portion 752; the extension portion 752 of the reflection sheet 75 is bent toward the light incident surface 742 of the light guide plate 74. The printed circuit board 722, the light incident surface 742, the reflective sheet 75 and the extending portion 752 form a receiving space for accommodating the point light source κ, so that the light emitted by the point light source 721 directly enters the light guiding plate 74. The invention has other solid suspension modes, such as the light source is a strip light source, the flexible printed circuit board is a lamp tube reflector, and the light source is a strip lamp tube, and is wrapped with a metal tube reflector having a U-shaped cross section and The strip-shaped bulb is fixed, and a side wall of the bulb reflector is used as a light source shield or the like instead of the light-shielding cover of the reflection sheet in the first embodiment. The present invention has been disclosed in the above embodiments, and it is not intended to limit the invention to those skilled in the art, and it is possible to make some modifications and refinements without departing from the spirit and scope of the invention. The scope of protection of the present invention is defined by the scope of the appended patent application as Form No. 1010101, page 9 / total 20 pages 0992001021-0 201124772. BRIEF DESCRIPTION OF THE DRAWINGS [0023] Fig. 1 is an exploded perspective view showing a first embodiment of a liquid crystal display device of the present invention. 2 is a partial assembly diagram of the liquid crystal display device shown in FIG. 1. 3 is a schematic cross-sectional view taken along line III-III of FIG. 2. 4 is an exploded perspective view showing a second embodiment of the liquid crystal display device of the present invention. 5 is a partial assembly diagram of the liquid crystal display device shown in FIG. 4. 6 is a schematic view taken along line VI-VI of FIG. 5. [Main component symbol description] [0029] Liquid crystal display device 100 [0030] Liquid crystal display panel 1 [0031] Light-shielding tape 3 [0032] Backlight module 4 [0033] Optical film group 41 [0034] Light source group 42, 72 [ 0035] plastic frame 43, 73 [0036] light guide plate 44, 74 [0037] reflective sheet 45, 75 [0038] point light source 421, 721 [0039] flexible printed circuit board 422, 722 0992001021-0 099100466 Form No. A0101 No. 10 Pages / 20 pages 201124772 [0040] bottom surface 441, 741 [0041] light-incident surface 442, 742 [0042] light-emitting surface 443 [0043] bearing surface 444, 744 [0044] connecting surface 445 [0045] extensions 452, 752 [0047] First connection portion 4521 Light source setting portion 4522 [0048] Light source shielding cover 4523 [0049] Through hole 731 [0050] Double-sided tape 80 099100466 Form number A0101 Page 11 / Total 20 pages 0992001021-0