201044070 六、發明說明： 【發明所屬之技術領域】 本發明係關於-種雙面顯示裝置及其背光模組 關於-種雙面液晶顯示裝置及其雙面側光式f光模組: 【先前技術】 近年來，由於液晶顯示技術發展迅速，液晶顯示 已成為各種電子產品例如電視、電腦或可攜式電子装置主 要的顯示介面。因現代電子產品的功能需求廣泛，液 示裝置不僅朝向薄型化設計，更由小尺寸發展至大尺寸.、，、，、 ^近更有可雙面顯示的液晶顯示裝置以取代可旋轉的 早面顯示液晶顯示裝置。為符合雙面顯示的需求’液晶顯 不裝置之背光模組，例如侧光式背光模組的框架設計 需變更設計才能符合需求。 —道請參照圖1所示’―種習知侧光式背光模組1〇包含 -導光板u、-發光元件12、—背板13、—膠框“、— 料15以及—光學膜片組16。導光板η具有-入光側m 及一出光側112，導光板11設置於背板13之上，且導光 Ϊ二與I:板13之間具有一反射片17。光學膜片組16設 先板U上。發光元件12為-燈管並鄰設於入光側 11 ’燈罩15環設於發光元件12以將發光元件12發出的 ^線反射進入導光板u。勝框14夹設光學膜片组16及燈 罩15 ’並包覆背板13的周緣。 然而’習知側光式背光模組1〇的結構，不僅其發光 201044070 元件12的光線經由導光板11及光學膜片組16之後僅為 單面出光，無法適用於具有雙面液晶顯示裝置。且，若為 雙面液晶顯示裝置所需之雙面側光式背光模組，由於必須 同時提供雙面出光，所以雙面侧光式背光模組之發光元件 12的發光能量，會比單面侧光式背光模組10的發光能量 大許多，如此發光元件12所散發的熱能亦將大幅提升， 而膠框14的材質對於發光元件12所產生的熱無法有效散 出。 ^ 因此，如何提供一種雙面液晶顯示裝置及其雙面侧光 式背光模組，以改變現有背光模組的框架結構，使侧光式 ' 背光模組能夠雙面出光，且有較佳的散熱能力，已成為重 要課題之一。 【發明内容】 有鑑於上述課題，本發明之目的為提供一種雙面液晶 Q 顯示裝置及其雙面侧光式背光模組，藉由改變現有背光模 組的框架結構，使侧光式背光模組能夠雙面出光，且能快 速逸散發光元件產生的廢熱以提升散熱效能。 為達上述目的，依據本發明之一種雙面側光式背光模 組包含一雙面導光組件、一發光元件、至少一第一框件以 及複數第二框件。雙面導光組件具有至少一入光側及複數 非入光侧。發光元件鄰設於入光侧。第一框件環設於發光 元件，並夾持雙面導光組件鄰近入光側的周緣。該等第二 框件分別對應夾持雙面導光組件鄰近該等非入光侧的周 201044070 緣，並與第一框件連結形成一 口字形框架。 為達上述目的，依據本發明之一種雙面液晶顯示裝置 包含 雙面侧光式专光权組以及一液晶顯不面板分別設 置於雙面側光式背光模組的二相對出光侧。雙面侧光式背 光模組包含一雙面導光組件、一發光元件、至少一第一框 件及複數第二框件。雙面導光組件具有至少一入光側及複 數非入光侧。發光元件鄰設於入光側。第一框件環設於發 光元件並夾持雙面導光組件鄰近入光侧的周緣。該等第二 框件分別對應夾持雙面導光組件鄰近該等非入光側的周 緣，並與第一框件連結形成一 口字形框架。 承上所述，依據本發明之一種雙面液晶顯示裝置及其 雙面側光式背光模組，藉由雙面導光組件結合金屬材質的 第一框件與塑膠材質的第二框件連結形成口字形框架，而 組成雙面侧光式背光模組。與習知技術相較，本發明雙面 側光式背光模組除可藉由雙面導光組件將光源導向二個 出光側，以使側光式背光模組能夠雙面出光，並可藉由第 一框件金屬材質的特性將漏電流導出，以及快速逸散發光 元件產生的廢熱而提升散熱效能。此外，口字型框架的組 裝只需將第一框件及第二框件由四個方向向内組裝，藉此 亦可提高雙面側光式背光模組的組裝效率。 【實施方式】 以下將參照相關圖式，說明依據本發明較佳實施例之 一種雙面液晶顯示裝置及其雙面侧光式背光模組，其中相 201044070 同的元件將以相同的符號加以說明。 請參照圖2A至圖2G所示’其中圖2A為本發明較佳 實施例之一種雙面侧光式背光模組2〇的俯視圖，圖2b至 圖2F分別為雙面側光式背光模組2〇沿圖2A中2〇γι、 20Υ2、20Υ3、20Υ4、20X5剖線的部分剖面圖，圖為 雙面側光式背光模組20端部的局部放大圖。本發明較佳 實施例之一種雙面側光式背光模組包含一雙面導光会201044070 VI. Description of the Invention: [Technical Field] The present invention relates to a double-sided display device and a backlight module thereof, and a double-sided liquid crystal display device and a double-sided side optical f-light module thereof: Technology In recent years, due to the rapid development of liquid crystal display technology, liquid crystal display has become the main display interface of various electronic products such as televisions, computers or portable electronic devices. Due to the wide range of functional requirements of modern electronic products, liquid display devices are not only oriented toward thin design, but also from small size to large size.,,,,,,,,,,,,,,,,,,,,,,,, The liquid crystal display device is displayed on the surface. In order to meet the needs of double-sided display, the backlight module of the LCD display device, such as the frame design of the edge-lit backlight module, needs to be changed to meet the demand. - Refer to Figure 1 for a description of the conventional light-emitting backlight module 1 - including - light guide u, - light-emitting element 12, - back plate 13, - plastic frame, - material 15 and - optical film The light guide plate η has a light-incident side m and a light-emitting side 112. The light guide plate 11 is disposed on the back plate 13, and a light-reflecting sheet 17 is disposed between the light-guiding plate 2 and the I: plate 13. The group 16 is disposed on the first board U. The light-emitting element 12 is a lamp tube and is disposed adjacent to the light-incident side 11'. The lamp cover 15 is disposed around the light-emitting element 12 to reflect the line emitted by the light-emitting element 12 into the light guide plate u. The optical film set 16 and the lamp cover 15' are interposed and cover the periphery of the back plate 13. However, the structure of the conventional side-lit backlight module 1 is not only the light of the 201044070 component 12 but also the light of the component 12 through the light guide plate 11 and the optical film. After the film group 16 is only one-sided light-emitting, it cannot be applied to a double-sided liquid crystal display device. Moreover, if it is a double-sided edge-light backlight module required for a double-sided liquid crystal display device, since it is necessary to provide both sides of the light, The illuminating energy of the illuminating element 12 of the double-sided edge-lit backlight module is higher than that of the single-sided side-lit backlight module 10 The energy is much larger, and the heat energy emitted by the light-emitting element 12 is also greatly increased, and the material of the plastic frame 14 cannot be effectively radiated to the heat generated by the light-emitting element 12. ^ Therefore, how to provide a double-sided liquid crystal display device and its double The surface-side backlight module has changed the frame structure of the existing backlight module, so that the edge-lit backlight module can emit light on both sides and has better heat dissipation capability, which has become one of the important topics. In view of the above problems, an object of the present invention is to provide a double-sided liquid crystal Q display device and a double-sided side light-type backlight module thereof. By changing the frame structure of the existing backlight module, the edge-lit backlight module can be double-sided. The double-sided edge-lit backlight module according to the present invention comprises a double-sided light guiding component, a light-emitting component, at least one a frame member and a plurality of second frame members. The double-sided light guiding device has at least one light incident side and a plurality of non-light incident sides. The light emitting element is disposed adjacent to the light incident side. The first frame member ring is disposed at And a second component of the double-sided light guiding component adjacent to the edge of the non-light-inside side In order to achieve the above object, a double-sided liquid crystal display device according to the present invention comprises a double-sided side light-type light-weighting group and a liquid crystal display panel respectively disposed on the double-sided side light-type backlight module. The two-sided light-emitting backlight module comprises a double-sided light-guiding component, a light-emitting component, at least one first frame member and a plurality of second frame members. The double-sided light guiding component has at least one light-incident side and The light-emitting element is disposed adjacent to the light-incident side, and the first frame member is disposed on the light-emitting element and sandwiches the peripheral edge of the double-sided light guide component adjacent to the light-incident side. The second frame members respectively are adjacent to the periphery of the non-light-incident side of the double-sided light guide assembly, and are coupled with the first frame member to form a square-shaped frame. According to the present invention, a double-sided liquid crystal display device and a double-sided side-light backlight module thereof according to the present invention are connected to a second frame member of a plastic material by a double-sided light guide assembly combined with a first frame member made of a metal material. Forming a square-shaped frame to form a double-sided edge-lit backlight module. Compared with the prior art, the double-sided edge-lit backlight module of the present invention can direct the light source to the two light-emitting sides by the double-sided light guiding component, so that the edge-lit backlight module can emit light on both sides, and can borrow The leakage current is derived from the characteristics of the first frame metal material, and the waste heat generated by the light-emitting element is quickly dissipated to improve the heat dissipation performance. In addition, the assembly of the mouth-shaped frame only needs to assemble the first frame member and the second frame member in four directions inward, thereby improving the assembly efficiency of the double-sided edge type backlight module. [Embodiment] Hereinafter, a double-sided liquid crystal display device and a double-sided side light type backlight module thereof according to a preferred embodiment of the present invention will be described with reference to the related drawings, wherein the same elements of the phase 201044070 will be described by the same symbols. . Referring to FIG. 2A to FIG. 2G, FIG. 2A is a top view of a double-sided edge-lit backlight module 2〇 according to a preferred embodiment of the present invention, and FIG. 2b to FIG. 2F are respectively a double-sided side light-type backlight module. 2 is a partial cross-sectional view along the line of 2〇γι, 20Υ2, 20Υ3, 20Υ4, 20X5 in Fig. 2A, which is a partial enlarged view of the end of the double-sided side light type backlight module 20. A double-sided edge-lit backlight module of the preferred embodiment of the present invention includes a double-sided light guide
件21、一發光元件22、至少一第一框件23以及複數第二 框件24。於本實施例中，以二個第一框件23及二個第一 框件24為例作說明，然其非用以限制本發明。 雙面側光式背光模組20可應用於雙面顯示裝置，μ 提供雙面出光的背光源。雙面導光組件21為雙面側光式 導光板’並具有至少一入光侧211及複數非入光側213(1 圖2A)。於本實施例中，雙面導光組件2〗！女一 有—\光側 211位於雙面導光組件21的上下兩側並分別對廣—第—忙A member 21, a light-emitting element 22, at least a first frame member 23, and a plurality of second frame members 24. In the present embodiment, the two first frame members 23 and the two first frame members 24 are taken as an example for illustration, which is not intended to limit the present invention. The double-sided edge-lit backlight module 20 can be applied to a double-sided display device, and μ provides a backlight with double-sided light output. The double-sided light guide unit 21 is a double-sided light guide plate ‘ and has at least one light incident side 211 and a plurality of non-light incident sides 213 (1 Fig. 2A). In this embodiment, the double-sided light guide assembly 2! Female one has - \ light side 211 is located on the upper and lower sides of the double-sided light guide assembly 21 and is respectively wide-first-busy
件23 ’二非入光側213位於雙面導光組件21的卢右兩b 並分別對應一第二框件24。 請同時參照圖2β至圖2E所示’雙面導光組件以例 如可具有二層導光板G及一反射片R，反射片R夾設於$ 些導光板G之間而使雙面導光組件21形成二入光侧2ΐι 及二出光侧212。 發光元件22可為一燈管或由發光二極體構成的發光 條（light bar) ’發光元件22鄰設於入光側211。第_框件 23例如可為金屬材質，環設於發光元件22，並夾持雔面 201044070 導光組件21鄰近入光侧211的周緣C1。發光元件22與第 一框件23對應而設的優點在於，發光元件22 (例如燈管） 於點亮時產生的漏電流，可直接藉由金屬材質的第—框件 23將漏電流導出。此外，第—框件23的金屬材質具有良 好的導熱效果，可將發光元件22所產生的廢熱導出。々 於本實施例中，雙面側光式背光模組20更可包含— 燈罩（lampholder) 25及二光學膜片組％。燈罩25設置 於第-框件23之内，並位於雙面導光組件21與第— 2<3之間。燈罩25環設於發光元件22，以將發光元件^ 發出的光線反射進入雙面導光组件2卜第一框件Μ細由 燈罩25而夾持雙面導光組件21鄰近入光侧2n的騎 c卜需注意的是，由於第—框件23為金屬材質，同樣可 具有反射光源的功效，故燈罩25亦可直接與第—框件23 -體成型’於此以第-框件23與燈罩25為不同 明。另外，第一框件23可具有播止部231用以固定燈罩兄 25，而擒止部231可由衝壓破孔方式在第—框件2 成二如圖2A及圖2B)來形成。再者，/ Μ更可具有二固定部233 (如圖2A、圖2 別設置於第-框…上下兩面，以分別固定 不面板（圖未顯示）。 日曰# 該等光學膜片組26例如可且 等，並分騎置於雙面導光料2'^、核片切賴片 链一 η ^組件21的二個Μ側212，丑 第一框件23夾持該等光學膜片組％。 請參照圖2F所示為雙面側光式背光魅20沿圖 201044070 中20X5剖線的剖面圖，該等第二框件24例如可為塑膠材 質，並分別對應夾持雙面導光組件21鄰近該等非入光側 213的周緣C2，其中，第二框件24可具有一定位部241 以定位及夾持雙面導光組件21及光學膜片組26。由於左 右兩侧並無燈罩25 (如圖2B所示）遮蔽光線，於本實施 例中，該等第二框件24之定位部241可藉由射出成型方 式形成，故可依據實際需求設計第二框件24於不同位置 有不同的厚度，完整包覆雙面側光式背光模組20左右兩 侧，而可避免漏光及異物進入。 請參照圖2G所示，第一框件23與第二框件24可藉 ' 由螺鎖（例如螺絲S鎖合）或卡合方式，於鄰近第一框件 23的端部E1與鄰近第二框件24的端部E2相互連結，使 第一框件23與第二框件24形成口字形框架。 請參照圖3A及圖3B所示，其中圖3A為本發明較佳 實施例之雙面液晶顯示裝置2的分解圖，圖3B為圖3A之 Q 雙面液晶顯示裝置2組合後沿第一框件23之固定部233 的局部剖面圖。 本發明較佳實施例之一種雙面液晶顯示裝置2包含一 雙面側光式背光模組20以及二液晶顯示面板30分別設置 於雙面侧光式背光模組20相對的二出光侧212。雙面侧光 式背光模組20的構成及功能已於上述實施例詳細說明， 於此不再贅述。 雙面液晶顯示裝置2更可包含二驅動電路元件40及 二前框50。其中，二驅動電路元件40之一端40a分別設 201044070 置於二液晶顯示面板30的上側的可視面服，二驅動電路 兀件之另-端_分別設置於對應液 ::第一 r23之上下二表面2 一。需注二是 口又置於液晶顯示面板30上側 路元件其上下二，㈣電 於、、$ a 3b之面積大於對應設置 於液日日頌不面板30下側之第一框件Μ 23a、23b之面積。 下一表面 -反顯示裝置2的組褒過程如下：二導光板G夾 =身板R形成雙面導光組件21，於入光側 兀件22及燈罩25 (如圖3B所示 置^ 於雙面導光組件21之1^ . 光予膜片組26 玆尊望_^「从 出先面，而後該等第—框件23與 μ荨苐—框件24於鄰近节耸笙. 4近°亥4弟—框件23與該等第二框件 24的^E1、£2藉由 牛 其中，雙面導光組件21、光^二，口字形框架， 燈罩^容置於口字發光元件22及 面板3〇及驅動電路元件:者，組設該等液晶顯示 於坌“ 件〇’使該等液晶顯示面板30固定 於第—框件23的固定部如 反0 口疋 件23和第-框杜％上人 被後將則框50與第—框 的組裝 件24卡合固定，完成雙面液晶顯示裝置2 紅上所述，依據本發明之— 雙面側光式背光模組，藉由雙面：：面“顯不裝置及其 弟-框件與塑膠材質的第二框件連…：屬材為的 組成雙面側光式背光模龟ώ 、、’4成口子形框架，而 側光式背光模組相較，本發明雙面 又面¥光組件將光源導向二個 201044070 出光侧，以使側光式背光模組能夠雙面出光，並可藉由第 一框件金屬材質的特性將漏電流導出，以及快速逸散發光 元件產生的廢熱而提升散熱效能。此外，口字型框架的組 裝只需將第一框件及第二框件由四個方向向内組裝，藉此 亦可提高雙面側光式背光模組的組裝效率。另外，在非發 光元件侧使用塑膠材質的第二框件，則可兼顧輕量、光線 遮蔽及防止異物進入等優點。 以上所述僅為舉例性，而非為限制性者。任何未脫離 Ο 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1為一種習知側光式背光模組的示意圖； 圖2A為依據本發明較佳實施例之一種雙面侧光式背 光模組的俯視圖； 〇 圖2B至圖2F為圖2A之雙面侧光式背光模組沿 20Y1、20Y2、20Y3、20Y4及20X5剖線的部分剖面圖； 圖2G為圖2A之雙面側光式背光模組於端部的局部放 大圖； 圖3A為依據本發明較佳實施例之一種雙面液晶顯示 裝置的結構分解圖；以及 圖3B為圖3A之雙面液晶顯示裝置組合後沿第一框件 之固定部的局部剖面圖。 201044070 【主要元件符號說明】 ίο:側光式背光模組 π :導光板 111、 211 :入光侧 112、 212 :出光侧 12、22 :發光元件 13 :背板 14 :膠框 15、 25 :燈罩 16、 26 :光學膜片組 17、 R :反射片 2 :雙面液晶顯示裝置 20 :雙面侧光式背光模組 20Y卜 20Y2、20Y3、20Y4、20X5 :剖線 21 :雙面導光組件 213 :非入光側 23 :第一框件 23a、23b :表面 231 :擂止部 232 :破孔 233 :固定部 24 :第二框件 241 :定位部 3 0 ·液晶顯不面板 12 201044070 30a :可視面 40 :驅動電路元件 40a、40b :端 50 :前框 C卜C2 :周緣 El、E2 :端部 ' G :導光板The second non-light incident side 213 is located at the right and right sides b of the double-sided light guide assembly 21 and corresponds to a second frame member 24, respectively. Referring to FIG. 2β to FIG. 2E, the double-sided light guiding component can have, for example, two light guiding plates G and one reflective sheet R, and the reflective sheet R is sandwiched between the light guiding plates G to make the double-sided light guiding. The assembly 21 forms a two-in-one light side 2ΐ and a second light-emitting side 212. The light-emitting element 22 can be a light tube or a light bar composed of a light-emitting diode. The light-emitting element 22 is adjacent to the light-incident side 211. For example, the first frame member 23 may be made of a metal material, and the ring member is disposed on the light-emitting element 22 and sandwiches the dome surface. 201044070 The light guide assembly 21 is adjacent to the peripheral edge C1 of the light-incident side 211. The light-emitting element 22 is provided corresponding to the first frame member 23 in that the leakage current generated during the lighting of the light-emitting element 22 (e.g., the lamp) can be directly derived from the leakage current of the metal frame member 23. Further, the metal material of the first frame member 23 has a good heat conduction effect, and the waste heat generated by the light-emitting element 22 can be derived. In this embodiment, the double-sided edge-lit backlight module 20 may further include a lamp holder 25 and a second optical film group %. The lamp cover 25 is disposed within the first frame member 23 and between the double-sided light guide member 21 and the second <3<3>. The lamp cover 25 is disposed on the light-emitting element 22 to reflect the light emitted by the light-emitting element into the double-sided light guide assembly. The first frame member is thinly covered by the lamp cover 25 to sandwich the double-sided light guide assembly 21 adjacent to the light-incident side 2n. It should be noted that since the first frame member 23 is made of a metal material and can also have the effect of reflecting the light source, the lamp cover 25 can also be directly formed with the first frame member 23 to be the first frame member 23 It is different from the lamp cover 25. In addition, the first frame member 23 may have a slinging portion 231 for fixing the lampshade brother 25, and the damper portion 231 may be formed by punching and puncturing in the first frame member 2 as shown in Figs. 2A and 2B). Furthermore, the / Μ can have two fixing portions 233 (as shown in FIG. 2A and FIG. 2, which are disposed on the upper and lower sides of the first frame) to respectively fix the non-panel (not shown). Japanese 曰# The optical film groups 26 For example, the optical frame can be erected and placed on the two side faces 212 of the double-sided light guide 2'^, the core piece-cutting sheet-n^ component 21, and the ugly first frame member 23 holds the optical films. Please refer to FIG. 2F as a cross-sectional view of the double-sided side-lighting backlight 20 along the line 20X5 in FIG. 201044070. The second frame members 24 can be made of plastic material, respectively, and respectively corresponding to the double-sided guide. The light assembly 21 is adjacent to the peripheral edge C2 of the non-light-incident side 213. The second frame member 24 can have a positioning portion 241 for positioning and clamping the double-sided light guide assembly 21 and the optical film group 26. The light shielding cover 25 (shown in FIG. 2B) shields the light. In this embodiment, the positioning portion 241 of the second frame member 24 can be formed by injection molding, so that the second frame member 24 can be designed according to actual needs. Different thicknesses in different positions, completely covering the left and right sides of the double-sided side-light backlight module 20, and avoiding light leakage and foreign matter entering Referring to FIG. 2G, the first frame member 23 and the second frame member 24 can be adjacent to the end E1 of the first frame member 23 by a screw lock (for example, a screw S) or a snap fit. The end portions E2 of the second frame member 24 are connected to each other, so that the first frame member 23 and the second frame member 24 form a square-shaped frame. Referring to FIG. 3A and FIG. 3B, FIG. 3A is a preferred embodiment of the present invention. An exploded view of the double-sided liquid crystal display device 2, and FIG. 3B is a partial cross-sectional view of the fixing portion 233 of the first frame member 23 after the Q-duplex liquid crystal display device 2 of FIG. 3A is combined. A double-sided embodiment of the preferred embodiment of the present invention The liquid crystal display device 2 includes a double-sided side light type backlight module 20 and two liquid crystal display panels 30 respectively disposed on the opposite light emitting side 212 of the double-sided side light type backlight module 20. The double-sided side light type backlight module 20 The configuration and function are described in detail in the above embodiments, and will not be further described herein. The double-sided liquid crystal display device 2 may further include two driving circuit components 40 and two front frames 50. The two terminals 40a of the two driving circuit components 40 are respectively provided with 201044070. a video mask placed on the upper side of the two liquid crystal display panels 30, two driving electric The other end of the path member is respectively disposed on the corresponding liquid: the first two surfaces of the first r23 and the second surface of the second one. The second is that the mouth is placed on the liquid crystal display panel 30, and the upper and lower components of the liquid crystal display panel 30 are upper and lower, and (4) electricity, and $ The area of a 3b is larger than the area of the first frame member Μ 23a, 23b corresponding to the lower side of the panel 30. The process of forming the next surface-reverse display device 2 is as follows: two light guide plates G clip = body plate R forms a double-sided light guiding component 21, and is disposed on the light-incident side member 22 and the lamp cover 25 (as shown in FIG. 3B to the double-sided light guiding member 21). The light is applied to the diaphragm group 26. From the front face, then the first frame member 23 and the μ frame member 24 are adjacent to each other. 4 near ° Hai 4 brother - frame member 23 and the second frame member 24 ^ E1, £ 2 By the cow, the double-sided light guiding component 21, the light-emitting diode, the mouth-shaped frame, and the lampshade are placed in the mouth-lighting component 22, the panel 3, and the driving circuit component: the liquid crystal is displayed in the frame. The mounting member 24 for fixing the liquid crystal display panel 30 to the fixing member of the first frame member 23, such as the anti-zero member 23 and the first frame, and the assembly member 24 of the frame 50 and the first frame The card is fixed and completed, and the double-sided liquid crystal display device 2 is red-on, according to the present invention - the double-sided side-light type backlight module, by the double-sided:: face "display device and its brother - frame and plastic material The second frame member is connected to: the double-sided side-lighting backlight mold turtle, the '4-port sub-frame, and the side-light backlight module, the double-sided and side-light component of the present invention The light source is directed to the two exit sides of the 201044070, so that the edge-lit backlight module can emit light on both sides, and the leakage current can be derived by the characteristics of the first frame metal material, and the waste heat generated by the fast-dissipating light-emitting element can be improved. Cooling performance. In addition, the assembly of the mouth-shaped frame only needs to assemble the first frame member and the second frame member in four directions inward, thereby improving the assembly efficiency of the double-sided edge type backlight module. In addition, the use of a second frame of plastic material on the non-light-emitting element side allows for both lightweight, light shielding, and prevention of foreign matter from entering. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations of the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional edge-lit backlight module; FIG. 2A is a top view of a double-sided edge-lit backlight module according to a preferred embodiment of the present invention; FIG. 2B to FIG. 2F 2A is a partial cross-sectional view of the double-sided side light type backlight module taken along line 20Y1, 20Y2, 20Y3, 20Y4, and 20X5; FIG. 2G is a partial enlarged view of the double-sided side light type backlight module of FIG. 2A at the end 3A is an exploded perspective view of a double-sided liquid crystal display device according to a preferred embodiment of the present invention; and FIG. 3B is a partial cross-sectional view of the fixed portion of the first frame member of the double-sided liquid crystal display device of FIG. 3A. 201044070 [Description of main component symbols] ίο: edge-lit backlight module π: light guide plates 111, 211: light-incident side 112, 212: light-emitting side 12, 22: light-emitting element 13: back plate 14: plastic frame 15, 25: Lampshade 16, 26: optical film group 17, R: reflection sheet 2: double-sided liquid crystal display device 20: double-sided side light type backlight module 20Y, 20Y2, 20Y3, 20Y4, 20X5: section line 21: double-sided light guide Component 213: non-light-in side 23: first frame member 23a, 23b: surface 231: stop portion 232: hole 233: fixing portion 24: second frame member 241: positioning portion 30; liquid crystal display panel 12 201044070 30a: visible surface 40: drive circuit elements 40a, 40b: end 50: front frame Cb C2: peripheral edge El, E2: end portion 'G: light guide plate