100年04月25日修正替换頁 1345657 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明係關於一種液晶顯示裝置。 【先前技術】 [0002] 近年來，液晶顯示器因體積輕薄、占用空間小、輻射小 等優點，而逐漸佔據了顯示產品的主流，並漸漸代替了 傳統之陰極射線管顯示器。液晶顯示器通常包括一面光 源，如背光模組，為其液晶顯示面板提供輝度充分且均 勻之平面光。 [0003] 請參閱圖1，係一種先前技術液晶顯示裝置之立體分解示 意圖。該液晶顯示裝置1包括一液晶顯示面板11及與該液 晶顯示面板11層疊設置之一背光模組10。該背光模組10 為該液晶顯示面板11提供均勻之平面光。該液晶顯示裝 置1進一步包括一鐵框190，以收容並加固該背光模組10 [0004] 該背光模組10包括一導光板140、一軟性電路板150、複 數點光源160及一膠框180。該複數點光源160設置於該 軟性電路板150上。 [0005] 該膠框180大體為矩形框體，其包括一第一側壁181、一 第二側壁182、一第三側壁183及一第四側壁184。該四 側壁181、182、183、184依序首尾相連，進而定義一第 一收容空間187收容該導光板140、該軟性電路板150及 該複數點光源160。其中，彼此相對之該第一側壁181與 該第三側壁183外側分別包括向該膠框180外側延伸之二 並列設置之凸塊185。 095149720 表單編號 A0101 第 3 頁/共 26 頁 1003143094-0 1345657 10ϋ年04月25日按正替換頁 [0006] 該鐵框190包括一矩形底板199，該底板199之四邊分別 垂直延伸一側邊，即第一側邊191、第二側邊192、第三 側邊193及第四側邊194，該四侧邊191、192、193、 194及該底板199定義一第二收容空間197收容該背光模 組10。其中，彼此相對之該第一側邊191與該第三側邊 193分別包括二並列設置之開口 195。該開口 195與該膠 框180之凸塊185——對應。該鐵框190之設計尺寸略大 於該膠框180之設計尺寸。 [0007] 請一併參閱圖2及圖3，圖2係該背光模組10與該鐵框190 之組裝示意圖，圖3係圖2沿ΠΙ-ΙΠ方向之截面示意圖。該 導光板140設置於該膠框180内，該軟性電路板150上之 複數點光源160設置於該膠框1&0之第二側壁182與該導 光板140之間。該鐵框190之第二收容空間197收容該背 光模組10，該膠框180之四凸塊185分別收容於該鐵框 190之四開口 195中與其卡合，進而將該背光模組10固定 於該鐵框10中。 [0008] 然，該鐵框190及該膠框180受生產成形條件之影響，其 尺寸與原設計尺寸存在一定之誤差，此誤差會造成該背 光模組10與該鐵框190之組裝不牢固。請一併參閱圖4， 係該背光模組10與該鐵框190鬆散組裝之截面示意圖。該 膠框180之尺寸較設計值偏小，該鐵框190之尺寸較設計 值偏大，該膠框180之四凸塊185僅有部份可分別收容於 對應之開口 195中，該液晶顯示裝置1在搬運或衝擊過程 中，該背光模組10易在該鐵框190中晃動。請參閱圖5與 圖6，若尺寸誤差較大，則該膠框180之第三側壁183與該 095149720 表單編號Α0101 第4頁/共26頁 1003143094-0 1345657 100年04月25日核正替換頁 鐵框190之第三侧邊193貼緊，該膠框180之第一侧壁181 脫離該鐵框190之第一側邊191導致該背光模組10與該鐵 框190脱離，從而影響該液晶顯示裝置1之結構可靠性。 【發明内容】 [0009] 有鑑於此，提供一種結構可靠性較高之液晶顯示裝置實 為必要。 [0010] 一種液晶顯示裝置，其包括一液晶顯示面板、一背光模 組及一第二框架。該背光模組與該液晶顯示面板層疊設 置，其包括一第一框架，該第一框架包括二彼此相對之 側壁，每一侧壁包括一滑槽。該第二框架收容並固定該 背光模組，其包括一矩形底板及與該第一框架側壁相對 應之二相對之側邊，該二側邊相對該底板之垂直延伸， 每一側邊包括向該第二框架内部延伸之且平行於該底板 之延伸片。該延伸片收容於該第一框架之滑槽中。該第 二框架進一步包括一設於該底板邊緣之開口，該側壁進 一步包括與該開口相對應之一彈性鍵，該彈性鍵沿該側 壁之邊緣延伸且延伸方向與第一框架與第二框架組裝方 向相同，該彈性鍵之末端略高於該第一框架之表面，該 彈性鍵收容於該開口中且與該開口之邊緣相抵觸。 [0011] 相較於先前技術，前述該液晶.顯示裝置第二框架之延伸 片收容於第一框架之滑槽中，使該第一框架與該第二框 架之配合更為牢固。於產品成形時，即使該二框架之實 際尺寸與設計尺寸略有誤差，此結構仍可實現配合之牢 固，進而該液晶顯示裝置之組裝較為牢固，可靠性較高 〇 095149720 表單編號A0101 第5頁/共26頁 1003143094-0 1345657 [0012] [0013] [0014] [0015] [0016] 095149720 100年 04月 25 日 【貫施方式】 凊參閱圖7 ’係本發明液晶顯示裝置一較佳實施方式之立 體分解示意圖。該液晶顯不裝置2包括一液晶顯示面板21 與一背光模組22。該背光模組22與該液晶顯示面板21層 疊設置並為該液晶顯示面板21提供均勻之平面光。該液 晶顯示裝置2進一步包括一鐵框29，以收容並加固該背光 模組22及該液晶顯示面板21 » 該背光模組22包括一導光板24、一軟性電路板25 '複數 點光源26及一膠框28。該複數點光源26設置於該軟性電 路板25上。 該膠框28大體為矩形框體，其包括一第—側壁281、—第 二側壁282、一第三側壁283及一第四侧壁284。該四側 壁281、282、283、284依序首尾相連，進而定義一第一 收容空間287收容該導光板24、該軟性電路板25及該複數 點光源26。 該鐵框29包括一矩形底板299 ’該底板299之三邊分別垂 直延伸一侧邊’即第一側邊2 91、第二侧邊2 9 2及第三側 邊293，該第一侧邊291與該第三側邊293相對設置且結 構對稱。該三側邊291、292、293及該底板299定義一第 二收容空間297以收容該背光模組22。 請一併參閱圖8、圖9、圖10及圖11，圖8係該膠框28與 該鐵框29反轉180°之立體分解示意圖，圖9係圖8中IX處 之放大示意圖，圖10係圖8中X處之放大示意圖，圖11係 圖8中XI處之放大示意圖》該鐵框29之第三側邊293設有 二延伸片298，該二延伸片298之間且該底板299之邊緣 表單編號A0101 第6頁/共26頁 1003143094-0 100年04月25日梭正替換頁 1345657 設有一矩形開口 296。該延伸片298向該鐵框29内部延伸 ’其平行於該底板299且與該底板299之間有一距離d。該 膠框28之第三側壁283包括二滑槽288及設置於該二滑槽 288之間之一彈性鍵286。該二滑槽288與該二延伸片298 位置對應，該彈性鍵286與該開口 296位置對應。該滑槽 288包括一方形缺口 2881及一滑道2882。該缺口 2881與 該滑道2882相通且其二者之底部在同一平面上。該缺口 2881之橫戴面積大於該延伸片298之面積，該缺口 2881 之深度與該延伸片298到該底板299之距離相同，該滑道 2882之寬度b略大於或等同於該延伸片298之厚度。該彈 性鍵286沿該第三側壁283之邊緣延伸，其延伸方向與該 滑道2882之延伸方向相同，該彈性鍵286之末端（未標示 )略高於該膠框28之表面。 [0017] 該導光板24設置於該膠框28内，該軟性電路板25上之複 數點光源26設置於該膠框28之第四側壁284與該導光板 24之間，該鐵框29之第二收容空間297收容該背光模組 22。該液晶顯示面板21設置於該導光板24之與該鐵框29 相反一側且收容於該膠框28中。 [0018] 請一併參閱圖12與圖13，圖12係該背光模組22與該鐵框 29反轉180°之組裝立體示意圖，圖13係圖12中XII處之 放大示意圖。在組裝過程中，首先將該鐵框29之第二側 邊292對應該膠框28之第二側壁282設置’並使該鐵框29 之延伸片298收容於該膠框28滑槽288之缺口 2881内，其 次，推動該鐵框29或該膠框28 ’使該延伸片298從該缺口 2881滑入該滑道2882直至該延伸片298與該滑道2882之 095149720 表單编號A0101 第7頁/共26頁 1003143094-0 1345657 100年04月25日核正替換頁 根部（未標示）抵觸’同時，該膠框28之彈性鍵286之末端 滑入該鐵框29之矩形開口 296中，且該鐵框29之第二側邊 292抵觸該膠框28之第二侧壁282。故，該背光模組22藉 由該鐵框29之延伸片298與該膠框28之滑道2882之配合 · 實現於豎直方向上Z軸之定位；藉由該膠框28之彈性鍵 286之末端與該鐵框29之矩形開口 296配合實現於X軸、Y 軸方向上定位。該鐵框29之第一侧邊291與第三側邊293 内側之距離’即該鐵框29之内部寬度略大於設計寬度或 該膠框28之第一側壁281與該第三侧壁283外側之距離， 即該膠框28之外側寬度略小於設計寬度，上述配合結構 都可保證該背光模組22與該鐵框29不脫離，進而該液晶 顯示裝置1之可靠性提高。 [0019] 惟’本發明液晶顯示裝置2不限於上述實施方式所述，其 可進一步包括一框架（圖未示），該框架收容並固定該液 晶顯示面板21且其與該膠框28之組裝方式等同於該鐵框 29與該膠框28之組裝方式。即，該膠框28上設有滑槽（圖 未示）與彈性鍵（圖未示），該框架29上亦設有延伸片（圖 未示）與矩形開口（圖未示），該滑槽與該延伸片配合，該 彈性鍵與該開口配合將該框架固定於該膠框28上。該框 架為金屬框，亦可為鐵柜。 [0020] 綜上所述，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方式為限，舉凡熟習 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。 095149720 表單編號A0101 第8頁/共26頁 1003143094-0 1345657 100年04月25日按正替换頁 【圖式簡單說明】 [0021] 圖1係一種先前技術液晶顯示裝置之立體分解示意圖。 [0022] 圖2係圖1所示液晶顯示裝置之背光模組與鐵框之組裝示 意圖。 [0023] 圖3係圖2沿m-m方向之截面示意圖。 [0024] 圖4係圖2所示背光模組與鐵框鬆散組裝之截面示意圖。 [0025] 圖5係圖2所示背光模組單側脫離鐵框之截面示意圖。 [0026] 圖6係圖5中VI部份之放大示意圖。 [0027] 圖7係本發明液晶顯示裝置一較佳實施方式之立體分解示 意圖。 [0028] 圖8係圖7所示液晶顯示裝置之膠框與鐵框反轉1 80 °之立 體分解示意圖。 [0029] 圖9係圖8中IX處之放大示意圖。 [0030] 圖10係圖8中X處之放大示意圖。 [0031] 圖11係圖8中XI處之放大示意圖。 [0032] 圖1 2係圖8所示液晶顯示裝置背光模組與鐵框反轉1 80°之 組裝立體示意圖。 [0033] 圖13係圖12中XII處之故大示意圖。 【主要元件符號說明】 [0034] 液晶顯示裝置：2 [0035] 液晶顯示面板：21 095149720 表單編號A0101 第9頁/共26頁 1003143094-0 1345657 [0036] 背光模組：22 [0037] 導光板：24 [0038] 軟性電路板：25 [0039] 點光源：26 [0040] 膠框：28 [0041] 鐵框：29 [0042] 第一侧壁：281 [0043] 第二侧壁：282 [0044] 第三側壁：283 [0045] 第四侧壁：284 [0046] 彈性鍵：286 [0047] 第一收容空間：287 [0048] 滑槽：288 [0049] 第一侧邊：291 [0050] 第二侧邊：292 [0051] 第三側邊：293 [0052] 開口 ： 296 [0053] 第二收容空間：297 [0054] 延伸片：298 095149720 表單編號Α0101 第10頁/共26頁 100年04月25日按正替Θ頁 1003143094-0 1345.657 [0055] 底板 [0056] 缺口 [0057] 滑道 100年04月25日修正替换頁 299 2881 2882 095149720 表單編號A0101 第11頁/共26頁 1003143094-0Correction replacement page of April 25, 100 1345657 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a liquid crystal display device. [Prior Art] [0002] In recent years, liquid crystal displays have gradually occupied the mainstream of display products due to their advantages of thin size, small footprint, and low radiation, and have gradually replaced conventional cathode ray tube displays. Liquid crystal displays typically include a light source, such as a backlight module, that provides a sufficiently uniform and uniform planar light for its liquid crystal display panel. Please refer to FIG. 1, which is a perspective exploded view of a prior art liquid crystal display device. The liquid crystal display device 1 includes a liquid crystal display panel 11 and a backlight module 10 stacked on the liquid crystal display panel 11. The backlight module 10 provides uniform planar light to the liquid crystal display panel 11. The liquid crystal display device 1 further includes an iron frame 190 for receiving and reinforcing the backlight module 10. The backlight module 10 includes a light guide plate 140, a flexible circuit board 150, a plurality of point light sources 160, and a plastic frame 180. . The complex point source 160 is disposed on the flexible circuit board 150. The frame 180 is generally a rectangular frame, and includes a first sidewall 181, a second sidewall 182, a third sidewall 183, and a fourth sidewall 184. The four side walls 181, 182, 183, and 184 are connected end to end, and a first receiving space 187 is defined to receive the light guide plate 140, the flexible circuit board 150, and the plurality of point light sources 160. The outer side of the first side wall 181 and the third side wall 183 respectively include two protrusions 185 arranged in parallel to the outer side of the plastic frame 180. 095149720 Form No. A0101 Page 3 of 26 1003143094-0 1345657 On April 25, 2010, press the replacement page [0006] The iron frame 190 includes a rectangular bottom plate 199, and the four sides of the bottom plate 199 extend vertically to one side. That is, the first side 191, the second side 192, the third side 193, and the fourth side 194. The four sides 191, 192, 193, and 194 and the bottom plate 199 define a second receiving space 197 for receiving the backlight. Module 10. The first side 191 and the third side 193 opposite to each other respectively include two openings 195 arranged in parallel. The opening 195 corresponds to the bump 185 of the frame 180. The design of the iron frame 190 is slightly larger than the design size of the frame 180. [0007] Please refer to FIG. 2 and FIG. 3 together. FIG. 2 is a schematic view showing the assembly of the backlight module 10 and the iron frame 190, and FIG. 3 is a schematic cross-sectional view of FIG. 2 along the ΠΙ-ΙΠ direction. The light guide plate 140 is disposed in the plastic frame 180. The plurality of point light sources 160 on the flexible circuit board 150 are disposed between the second side wall 182 of the plastic frame 1&0 and the light guide plate 140. The second receiving space 197 of the iron frame 190 accommodates the backlight module 10, and the four bumps 185 of the plastic frame 180 are respectively received in the four openings 195 of the iron frame 190 to be engaged with the backlight module 10, thereby fixing the backlight module 10. In the iron frame 10. [0008] However, the iron frame 190 and the plastic frame 180 are affected by the production forming conditions, and the size thereof has a certain error with the original design size, and the error may cause the assembly of the backlight module 10 and the iron frame 190 to be weak. . Referring to FIG. 4 together, a cross-sectional view of the backlight module 10 and the iron frame 190 is loosely assembled. The size of the frame 180 is smaller than the design value. The size of the frame 190 is larger than the design value. Only the portions of the four protrusions 185 of the frame 180 can be respectively received in the corresponding openings 195. The backlight module 10 is easily shaken in the iron frame 190 during the handling or impact of the device 1. Referring to FIG. 5 and FIG. 6 , if the dimensional error is large, the third side wall 183 of the plastic frame 180 and the 095149720 form number Α 0101 4th page / 26 pages 1003143094-0 1345657 100 April 25, the nuclear replacement The third side 193 of the frame 190 is in close contact with the first side 181 of the frame 180, and the first side 191 of the frame 190 is separated from the frame 190, thereby causing the backlight module 10 to be detached from the frame 190, thereby affecting The structural reliability of the liquid crystal display device 1. SUMMARY OF THE INVENTION [0009] In view of the above, it is necessary to provide a liquid crystal display device having high structural reliability. [0010] A liquid crystal display device comprising a liquid crystal display panel, a backlight module, and a second frame. The backlight module is laminated with the liquid crystal display panel and includes a first frame. The first frame includes two sidewalls opposite to each other, and each sidewall includes a sliding slot. The second frame receives and fixes the backlight module, and includes a rectangular bottom plate and two opposite side edges corresponding to the sidewall of the first frame, the two sides extending perpendicularly with respect to the bottom plate, each side edge including The second frame extends internally and is parallel to the extension of the bottom plate. The extension piece is received in the sliding slot of the first frame. The second frame further includes an opening disposed at an edge of the bottom plate, the side wall further comprising a resilient key corresponding to the opening, the resilient key extending along an edge of the sidewall and extending in a direction to be assembled with the first frame and the second frame The direction is the same, the end of the elastic key is slightly higher than the surface of the first frame, and the elastic key is received in the opening and interferes with the edge of the opening. [0011] Compared with the prior art, the extension piece of the second frame of the liquid crystal display device is received in the sliding groove of the first frame, so that the cooperation between the first frame and the second frame is stronger. When the product is formed, even if the actual size and design size of the two frames are slightly different, the structure can be firmly matched, and the liquid crystal display device is assembled more firmly and has higher reliability. 095149720 Form No. A0101 Page 5 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 A schematic exploded view of the method. The liquid crystal display device 2 includes a liquid crystal display panel 21 and a backlight module 22. The backlight module 22 is disposed on the liquid crystal display panel 21 and provides uniform planar light to the liquid crystal display panel 21. The liquid crystal display device 2 further includes an iron frame 29 for receiving and reinforcing the backlight module 22 and the liquid crystal display panel 21. The backlight module 22 includes a light guide plate 24, a flexible circuit board 25', and a plurality of point light sources 26 and A plastic frame 28. The complex point light source 26 is disposed on the flexible circuit board 25. The frame 28 is generally a rectangular frame and includes a first side wall 281, a second side wall 282, a third side wall 283 and a fourth side wall 284. The four side walls 281, 282, 283, and 284 are connected end to end, and a first receiving space 287 is defined to receive the light guide plate 24, the flexible circuit board 25, and the plurality of point light sources 26. The iron frame 29 includes a rectangular bottom plate 299. The three sides of the bottom plate 299 extend perpendicularly to one side, that is, the first side edge 2 91, the second side edge 2 9 2 and the third side edge 293. The first side edge The 291 is disposed opposite to the third side 293 and is structurally symmetrical. The three sides 291, 292, and 293 and the bottom plate 299 define a second receiving space 297 for receiving the backlight module 22. Please refer to FIG. 8 , FIG. 9 , FIG. 10 and FIG. 11 . FIG. 8 is a perspective exploded view of the plastic frame 28 and the iron frame 29 reversed by 180°, and FIG. 9 is an enlarged schematic view of the IX of FIG. 8 . 10 is an enlarged schematic view of X in FIG. 8, and FIG. 11 is an enlarged schematic view of XI in FIG. 8. The third side 293 of the iron frame 29 is provided with two extending pieces 298, and between the two extending pieces 298 and the bottom plate 299 Edge Form No. A0101 Page 6 of 26 Page 1003143094-0 On April 25, 100, the shuttle replacement page 1345657 is provided with a rectangular opening 296. The extension piece 298 extends toward the inside of the iron frame 29' which is parallel to the bottom plate 299 and has a distance d from the bottom plate 299. The third side wall 283 of the plastic frame 28 includes two sliding slots 288 and one elastic key 286 disposed between the two sliding slots 288. The two sliding slots 288 correspond to the positions of the two extending pieces 298, and the elastic keys 286 correspond to the positions of the openings 296. The chute 288 includes a square notch 2881 and a chute 2882. The notch 2881 communicates with the slide 2882 and the bottoms of the two are on the same plane. The cross-sectional area of the notch 2881 is larger than the area of the extending piece 298. The depth of the notch 2881 is the same as the distance from the extending piece 298 to the bottom plate 299. The width b of the sliding path 2882 is slightly larger or equal to that of the extending piece 298. thickness. The elastic key 286 extends along the edge of the third side wall 283 and extends in the same direction as the extending direction of the slide 2882. The end of the elastic key 286 (not shown) is slightly higher than the surface of the plastic frame 28. The light guide plate 24 is disposed in the plastic frame 28. The plurality of point light sources 26 on the flexible circuit board 25 are disposed between the fourth side wall 284 of the plastic frame 28 and the light guide plate 24. The second receiving space 297 houses the backlight module 22 . The liquid crystal display panel 21 is disposed on the opposite side of the iron frame 29 of the light guide plate 24 and is received in the plastic frame 28 . [0018] Please refer to FIG. 12 and FIG. 13 together. FIG. 12 is an assembled perspective view of the backlight module 22 and the iron frame 29 reversed by 180°, and FIG. 13 is an enlarged schematic view of the XII in FIG. In the assembly process, the second side 292 of the iron frame 29 is disposed corresponding to the second side wall 282 of the plastic frame 28, and the extension piece 298 of the iron frame 29 is received in the gap of the sliding frame 288 of the plastic frame 28. In 2881, secondly, the iron frame 29 or the plastic frame 28' is pushed to slide the extension piece 298 from the notch 2881 into the slide 2882 until the extension piece 298 and the slide 2882 are 095149720. Form No. A0101 Page 7 / Total 26 pages 1003143094-0 1345657 On April 25, 100, the core replacement page root (not shown) is in conflict with 'the same time, the end of the elastic key 286 of the plastic frame 28 slides into the rectangular opening 296 of the iron frame 29, and The second side 292 of the iron frame 29 abuts the second side wall 282 of the frame 28. Therefore, the backlight module 22 realizes the positioning of the Z axis in the vertical direction by the cooperation of the extending piece 298 of the iron frame 29 and the slide 2882 of the plastic frame 28; the elastic key 286 of the plastic frame 28 The end is engaged with the rectangular opening 296 of the iron frame 29 to achieve positioning in the X-axis and Y-axis directions. The distance between the first side 291 of the iron frame 29 and the inner side of the third side 293, that is, the inner width of the iron frame 29 is slightly larger than the design width or the first side wall 281 and the outer side of the third side wall 283 of the plastic frame 28. The distance between the outer side of the plastic frame 28 is slightly smaller than the design width. The above-mentioned matching structure can ensure that the backlight module 22 and the iron frame 29 are not separated, and the reliability of the liquid crystal display device 1 is improved. [0019] The liquid crystal display device 2 of the present invention is not limited to the above embodiment, and may further include a frame (not shown) that houses and fixes the liquid crystal display panel 21 and assembles the same with the plastic frame 28. The manner is equivalent to the manner in which the iron frame 29 and the plastic frame 28 are assembled. That is, the plastic frame 28 is provided with a sliding slot (not shown) and a resilient button (not shown). The frame 29 is also provided with an extension piece (not shown) and a rectangular opening (not shown). The slot cooperates with the extension piece, and the resilient key cooperates with the opening to fix the frame to the frame 28. The frame is a metal frame or an iron cabinet. [0020] In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not in the above embodiment. The equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. 095149720 Form No. A0101 Page 8 of 26 1003143094-0 1345657 On April 25th, 100th, according to the replacement page [Simplified Schematic] [0021] FIG. 1 is a perspective exploded view of a prior art liquid crystal display device. 2 is a schematic view showing the assembly of a backlight module and an iron frame of the liquid crystal display device shown in FIG. 1. 3 is a schematic cross-sectional view of FIG. 2 along the m-m direction. 4 is a schematic cross-sectional view showing the loose assembly of the backlight module and the iron frame shown in FIG. 2. 5 is a schematic cross-sectional view of the backlight module shown in FIG. 2 with one side detached from the iron frame. 6 is an enlarged schematic view of a portion VI of FIG. 5. 7 is a perspective exploded view of a preferred embodiment of a liquid crystal display device of the present invention. 8 is a schematic exploded view of the plastic frame of the liquid crystal display device of FIG. 7 with the iron frame reversed by 180 °. 9 is an enlarged schematic view of a portion IX of FIG. 8. 10 is an enlarged schematic view of a portion X in FIG. 8. 11 is an enlarged schematic view of a portion XI of FIG. 8. [0032] FIG. 1 is an assembled perspective view of the backlight module of the liquid crystal display device shown in FIG. 8 and the iron frame reversed by 180°. [0033] FIG. 13 is a schematic view showing the reason at XII in FIG. [Main component symbol description] [0034] Liquid crystal display device: 2 [0035] Liquid crystal display panel: 21 095149720 Form No. A0101 Page 9 / Total 26 pages 1003143094-0 1345657 [0036] Backlight module: 22 [0037] Light guide plate :24 [0038] Flexible circuit board: 25 [0039] Point source: 26 [0040] Frame: 28 [0041] Iron frame: 29 [0042] First side wall: 281 [0043] Second side wall: 282 [ 0044] Third side wall: 283 [0045] Fourth side wall: 284 [0046] Elastic key: 286 [0047] First receiving space: 287 [0048] Chute: 288 [0049] First side: 291 [0050 ] Second side: 292 [0051] Third side: 293 [0052] Opening: 296 [0053] Second receiving space: 297 [0054] Extension: 298 095149720 Form number Α 0101 Page 10 / Total 26 pages 100 April 25th, according to the replacement page 1003143094-0 1345.657 [0055] Backplane [0056] Notch [0057] Slideway April 25, 1995 Correction Replacement Page 299 2881 2882 095149720 Form No. A0101 Page 11 of 26 1003143094-0