200815845 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種背光模組’特別是指一種具有良好散熱效果的背光 模組。 【先前技術】 由於液晶顯示器面板中的液晶本身不具有發光特性，因而，為達到 . .... - .·、 . 顧示效果，需要給液晶顯示器面板提供一光源’如燈管裝置>，該光源 • ' 一...：. 經與其他元件組合後形成一背光模組，穩固地安裝於液晶顯示器的背 板上。背光模組的功能在於向液晶顯示器面板供應輝度充分並且分佈 均勻的面光源。 請參見第五圖所示，美國專利公告號第us 6,611，304號揭示了一種 習知背光模組。該習知背光模組包括燈管丨、環繞燈管丨的反射罩2、 麟畴鮮1的燈管座la，以及被反射罩2關0部2續夾持的導 籲 光板3。該導光板3麟紐管！射出的光轉魏面絲而均句射 出。導光板3的底面設有反光板4。燈管座la的一表面與導光板3的 入光面孔完全貼合。燈管1發光的同時會產生熱量，尤其以燈管1兩 端的電極部（插入燈管座la的部分）產生的熱量為最高，可以超過攝 氏100度，該些熱量聚集在反射罩2内並透過燈管座la而傳導至導光 板3而‘光板3多採用樹脂材質製成，其熔點一般在攝氏80度左右， 故燈g 1產生的尚熱量，易使導光板3與燈管座之間的接觸區域產 生熱輯象，钱造成整體背賴組有發光不㈣問題。可見，如何 200815845 及日而有效的散熱是背光模組設計與製造中面臨的一個重要課題。 另請參見第六圖所示，中國專利申請第200410015304」號，其揭 不了一種具有散熱功能的習知背光模組。該習知背光模組是在反射罩 10的底壁11上開設一排散熱孔15，使燈管25發出的經多次反射仍未 進入導光板2〇的無效光所形成的熱量，通過散熱孔ls排出反射罩1〇 之外。此種結構雖然可以在一定程度上改善反射罩1〇内聚集的高熱量 所容易引發的光學膜片受熱變形的問題，然而，還是無法解決導光板 20熱熔的問題，故仍然有可能造成背光模組光学不良。 故’有必要提供-種背光模組，以解決習知技術中所存在的缺陷。 【發明内容】 本發明之目的在於提供一種具有良好散熱效果的背光模組。 為實現上述目的，本發明提供一種背光模組，其包括至少一燈管， 兩燈官座，-反射罩及—導光板。所述燈管的兩端具有兩電極端。兩 燈管座分以收容該燈管的兩電極端。反射罩用靴容該兩燈管座 及燈管。導光板具有-人光面及二相對的±、下側面，該人光面舆該 兩燈管座相互接觸，且該燈管座與導光板之_成—接舰域，該接 觸區域上開設有凹槽。該凹槽可以開設于燈管座上，也可以開設於導 光板上，EJ槽使得燈管座與導光板於接觸區域上並未完全接觸，從而 減少實際接觸面積。 在-貫施例中，該背細域包括_反射罩可扣合于燈管座上，且 反射罩具有-底壁和兩懒，其至少—側壁上開設有與所述凹槽相對 200815845 • 應的開口，以使熱量通過該開口進一步散發出去。 在一實施例中，該燈管座内沿其縱向上開設有用以收容燈管末端的 燈管收容通道，且前述凹槽與該燈管收容通道相互連通，燈管座兩相 對側具有用以配合反射罩之插接面，該凹槽橫向貫穿燈管座兩相對側 的插接面。 與本發明之先前技術相比較，本發明在燈管座和導光板之接觸區域 開设凹槽’使得燈管座與導光板接觸面積減少，使其間的熱量可以通 過該凹槽而散發出去，防止了導光板的熱熔，從而保證背光模組的出 光效果。 【實施方式】 本發明之背光模組可應用於各類型液晶顯示裝置，如電腦液晶顯示 器、液晶電視機、手機液晶屏幕等。 首先請參見第一至第三圖，其顯示的是依據本發明第一實施例之背 光模組200。該背光模組2〇〇包括燈管21、導光板22、分別用以收容 燈管21兩端兩電極端211的兩個燈管座23(本發明之圖示僅顯示一個 燈官座）’以及收容兩燈管座23及燈管21之反射罩24。反射罩24用 以將燈管21射出的光線反射至導光板22。該反射罩24的横截面約略 呈“C”形或“U”形，其具有一底壁243和兩長短侧壁241、2似。兩 長短侧壁241、242分別從底壁之兩侧朝導光板22方向延伸出。該側 壁241、242上分別開設有插孔2430。 每一燈管座23内沿其縱向開設有燈管收容通道（未標號），用以收 200815845 容燈管2丨的電極端川，且該燈管座23具有兩相對之插接面23i，其 上分別向外凸設有插接部232，用以分別與反射罩24兩側壁241、如 上的插孔2430作緊配合，從而將燈管座23兩側壁固定在反射罩24内。 燈管座23上還具有-對接部233，其内側面用以與導光板22的一縱向 側面221抵接。在本實施例巾，該對接部233旁侧形成一凹陷部挪， 其表面接觸導光板22的入光面222(如第二圖所示），從而在該凹陷部 234與導光板22的入光面222之間形成一接觸區域说。在該接觸區 域235中’凹陷部234表面形成有凹槽236，其將凹陷部^的分隔成 兩部分，即一部分與導光板22實際接觸，而$ 一部分在凹槽a6處導 光板22與燈管座23無接觸，亦即導光板22並未完全覆蓋該凹陷部 234 ’從而減少導光板μ與燈管座23之間的接觸面積。該凹槽说的 形狀和數量不限，但凹槽236的深度應足以暴露出燈管21，即凹槽说 與燈管收容通道相互連通，且凹槽236橫向貫穿燈管座23之兩側插接 面231。因此’燈官21的電極端211所產生的並聚集在燈管座周圍 的熱篁可以通過凹槽236而散發出去，從而降低接觸區域235的溫度， 保護導光板22不至於發生熱疼。在其他實施例中，對接部加上也可 以不設凹陷部234 ’而是直接將導光板a安裝至對接部233，並在對 接部233上開設凹槽，以減少導光板22與燈管座23之間的接觸面積。： 更進y .本發明月光挺組2〇〇還可以在反射罩.24的側壁241、 242上’於相對應該凹槽236的位置，分别開設與凹槽236相連通的開 口 2410、2420，以使熱量能夠更好地通過反射罩24而散發出去。 200815845 請參見第四®，其顯示的是依據本發明第二實施例之背光模組 300。該背光模組300包括燈管（未圖示）、導光板32、燈管座％和反 射罩34 ’其連接結驗第一實施例近似，兩者不同之處在於第二實施 例之燈管座33不設凹槽’而是在導光板32的入光面322上開設凹槽 336。當導光板32安裝至燈管座％上之一凹陷部州時，導光板^ 與燈管座33之間形成-接觸區域335，在該接觸區域335上，導光板 22有-部分與燈管座33 f際接觸，而另—部分（即凹槽说幻與燈 管座33無接觸，亦即導光板22並未完全覆蓋該凹陷部334，從而減少 ‘光板32與燈官座33之間的接觸面積。在本實施例中，凹槽说係 橫向貫穿導光板32之兩相對的上、下側面，且該凹槽说於導光板32 上的數量及具體位置不限，例如可以開設於導光板％的入光面似的 -角’但應臨近燈管的電極端（未圖示），以使燈f電極端聚集的高熱 量及時散發itl去，從而魏導紐32射_舰。 ，可（本七明之月光模組係藉由在燈管座或導光板上開設有 凹槽’ θ在使好座與導光板之聰減少麵雜，勸使背光模組 能夠很好的散熱。 练上所述，本發明確已符合發明專利之要件，爰依法提出專利申 '准社所述者僅爲本發明之較佳實施方式，舉凡熟習本案技術 ^絲飾化’如對反解和燈管 座的形狀以及凹槽的數量和開設的具體位置進行變換，皆涵蓋於後附 之申請專利範圍内。 200815845 【圖式簡單說明】 第一圖為本發明背光模組之第一實施例之一視角之部分立體圖； 第二圖為本發明背光模組之第一實施例之另一視角之部分立體圖; ^ * 第三圖為本發明背光模組之第一實施例之再一視角之部分立體圖; 1四圖為本發明背光模組之第二實施例之部分立體圖; 第五圖為一習知背光模組之結構示意圖；以及 g 第六圖為另一習知背光模組之結構示意圖。 - ·. .. · 【主要级件符號說明】 燈管 1、2ί、25 燈管座 la、23、33 反射罩 10'2、24、34 底壁 11、243 散熱孔 15 開口部 2a 導光板 20、22、3、32 背光模組 200、300 電極端 211 縱向側面 221 入光面 222、3c、322 插接面 231 插接部 232 對接部 233 凹陷部 234 '334 接觸區域 235、335 凹槽 236、336 側壁 241 ' 242 開口 2410、2420 插孔 2430 反光板 4200815845 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module ‘in particular to a backlight module having a good heat dissipation effect. [Prior Art] Since the liquid crystal in the liquid crystal display panel itself does not have the light-emitting property, in order to achieve the effect, it is necessary to provide a light source 'such as a lamp device> to the liquid crystal display panel. , the light source • ' one...:. After being combined with other components to form a backlight module, it is firmly mounted on the back panel of the liquid crystal display. The function of the backlight module is to supply a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel. Referring to the fifth figure, a conventional backlight module is disclosed in U.S. Patent No. 6,611,304. The conventional backlight module comprises a lamp tube, a reflector cover around the lamp tube 2, a lamp holder la of the rim domain 1 , and a light guide plate 3 which is continuously clamped by the reflector 2 to the 0 portion 2. The light guide plate 3 nucleus! The emitted light is turned into a Wei noodles and is uniformly shot. The reflector 3 is provided on the bottom surface of the light guide plate 3. A surface of the lamp holder la completely conforms to the light-incident face of the light guide plate 3. When the lamp 1 emits light, heat is generated, especially the electrode portion at both ends of the lamp tube 1 (the portion inserted into the lamp socket la) is the highest, which may exceed 100 degrees Celsius, and the heat is collected in the reflector 2 and It is transmitted to the light guide plate 3 through the lamp holder la and the 'light plate 3 is made of resin material. The melting point is generally about 80 degrees Celsius. Therefore, the heat generated by the lamp g 1 is easy to make the light guide plate 3 and the lamp socket. The contact area between the two creates a thermal image, and the money causes the whole to rely on the group to have no light (4). It can be seen that how 200815845 and effective heat dissipation are an important issue in the design and manufacture of backlight modules. See also the sixth figure, Chinese Patent Application No. 200410015304, which discloses a conventional backlight module having a heat dissipation function. The conventional backlight module is provided with a row of heat dissipation holes 15 on the bottom wall 11 of the reflector cover 10, so that the heat generated by the lamp 25 is reflected by the ineffective light that has not been reflected into the light guide plate 2 by multiple reflections. The hole ls is discharged from the reflector 1 . Although such a structure can improve the thermal deformation of the optical film which is easily caused by the high heat accumulated in the reflector 1 to some extent, the problem of heat fusion of the light guide plate 20 cannot be solved, so that the backlight may still be caused. The module is poorly optical. Therefore, it is necessary to provide a backlight module to solve the defects in the prior art. SUMMARY OF THE INVENTION It is an object of the present invention to provide a backlight module having a good heat dissipation effect. To achieve the above object, the present invention provides a backlight module including at least one lamp tube, two lamp seats, a reflector, and a light guide plate. Both ends of the tube have two electrode ends. The two lamp holders are divided to receive the two electrode ends of the lamp. The reflector cover accommodates the two lamp holders and the lamp tube. The light guide plate has a human light surface and two opposite ± and a lower side surface, wherein the two light tube holders are in contact with each other, and the lamp tube holder and the light guide plate are connected to each other, and the contact area is opened. There are grooves. The recess can be opened on the lamp holder or on the light guide plate. The EJ slot makes the lamp holder and the light guide plate not completely contact with each other on the contact area, thereby reducing the actual contact area. In the embodiment, the back-grained region includes a reflector that can be fastened to the lamp socket, and the reflector has a bottom wall and two laons, at least the sidewalls are opposite to the recesses 200815845. The opening should be such that heat is further dissipated through the opening. In an embodiment, a lamp tube receiving passage for receiving the end of the lamp tube is disposed in the longitudinal direction of the lamp tube holder, and the groove is connected to the lamp tube receiving passage, and the opposite sides of the lamp tube holder are used for The groove is matched with the insertion surface of the reflector, and the groove extends transversely through the insertion faces of the opposite sides of the lamp socket. Compared with the prior art of the present invention, the present invention provides a groove in the contact area between the lamp holder and the light guide plate, so that the contact area between the lamp holder and the light guide plate is reduced, and heat between the lamp holder can be dissipated through the groove. The heat fusion of the light guide plate is prevented, thereby ensuring the light-emitting effect of the backlight module. [Embodiment] The backlight module of the present invention can be applied to various types of liquid crystal display devices, such as a computer liquid crystal display, a liquid crystal television, a mobile phone liquid crystal screen, and the like. Referring first to the first to third figures, there is shown a backlight module 200 in accordance with a first embodiment of the present invention. The backlight module 2 includes a lamp tube 21, a light guide plate 22, and two lamp sockets 23 for accommodating the two electrode ends 211 of the lamp tube 21 (the illustration of the present invention only shows one lamp seat). And a reflector cover 24 for accommodating the two lamp sockets 23 and the lamp tubes 21. The reflector 24 is used to reflect the light emitted from the bulb 21 to the light guide plate 22. The reflector 24 has a cross-section that is approximately "C" shaped or "U" shaped and has a bottom wall 243 and two long and short side walls 241, 2. The two long and short side walls 241, 242 extend from the both sides of the bottom wall toward the light guide plate 22, respectively. A socket 2430 is defined in each of the side walls 241 and 242. A lamp tube receiving passage (not labeled) is disposed in each of the lamp holders 23 in the longitudinal direction thereof for receiving the electrode end of the 200815845 lamp tube 2, and the lamp holder 23 has two opposite insertion faces 23i. An insertion portion 232 is respectively protruded outwardly for tightly engaging with the two side walls 241 of the reflector cover 24 and the above-mentioned socket 2430, thereby fixing the two side walls of the lamp socket 23 in the reflection cover 24. The lamp holder 23 further has an abutting portion 233 whose inner side surface abuts against a longitudinal side surface 221 of the light guide plate 22. In the embodiment of the present invention, a recessed portion is formed on the side of the abutting portion 233, and the surface thereof contacts the light incident surface 222 of the light guide plate 22 (as shown in the second figure), so that the recessed portion 234 and the light guide plate 22 are inserted therein. A contact area is formed between the smooth faces 222. In the contact region 235, the surface of the recessed portion 234 is formed with a recess 236 which divides the recessed portion into two parts, that is, a portion is actually in contact with the light guide plate 22, and a portion of the light guide plate 22 and the light at the recess a6 The stem 23 has no contact, that is, the light guide plate 22 does not completely cover the recessed portion 234' to reduce the contact area between the light guide plate μ and the bulb holder 23. The shape and number of the grooves are not limited, but the depth of the groove 236 should be sufficient to expose the lamp tube 21, that is, the groove is said to communicate with the tube receiving passage, and the groove 236 extends transversely across the two sides of the tube holder 23. Plug surface 231. Therefore, the heat generated by the electrode terminal 211 of the lamp lamp 21 and accumulated around the lamp holder can be dissipated through the groove 236, thereby lowering the temperature of the contact region 235 and protecting the light guide plate 22 from thermal pain. In other embodiments, the abutting portion may be provided with the light guide plate a directly attached to the abutting portion 233 without a recess portion 234 ′, and a groove may be formed in the abutting portion 233 to reduce the light guide plate 22 and the lamp socket. Contact area between 23. Further, the illuminating group 2 本 of the present invention can also open the openings 2410 and 2420 respectively communicating with the grooves 236 at the positions corresponding to the grooves 236 on the side walls 241 and 242 of the reflector cover 24, respectively. In order to allow heat to pass through the reflector 24 better. 200815845 See fourth®, which shows a backlight module 300 in accordance with a second embodiment of the present invention. The backlight module 300 includes a lamp tube (not shown), a light guide plate 32, a lamp holder %, and a reflector cover 34'. The connection is identical to the first embodiment, and the difference is in the lamp of the second embodiment. The seat 33 is not provided with a groove 'but a groove 336 is formed on the light incident surface 322 of the light guide plate 32. When the light guide plate 32 is mounted to one of the recessed states on the lamp holder seat, a light-contacting plate and a lamp holder 33 form a contact area 335, on which the light guide plate 22 has a portion and a lamp tube. The seat 33f is in contact with each other, and the other part (ie, the groove is said to have no contact with the lamp holder 33, that is, the light guide plate 22 does not completely cover the recessed portion 334, thereby reducing the gap between the light plate 32 and the lamp seat 33. In this embodiment, the groove is said to extend transversely through the opposite upper and lower sides of the light guide plate 32, and the number and specific position of the groove on the light guide plate 32 are not limited, and may be, for example, The light-incident surface of the light guide plate is similar to the angle - but should be adjacent to the electrode end of the lamp tube (not shown), so that the high heat accumulated at the electrode end of the lamp f is timely dissipated into itl, so that the Wei guide 42 is fired. Yes, (the moonlight module of this Qiming is made by providing a groove in the lamp holder or the light guide plate θ to reduce the surface of the good seat and the light guide plate, and to encourage the backlight module to dissipate heat well. As described above, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. For the preferred embodiment of the present invention, the technique of the present invention, such as the inverse solution and the shape of the lamp socket and the number of grooves and the specific position of the opening, are included in the attached patent application. The first figure is a partial perspective view of a first embodiment of the backlight module of the present invention; the second figure is another perspective of the first embodiment of the backlight module of the present invention. 3 is a partial perspective view of a second embodiment of the backlight module of the present invention; FIG. 4 is a partial perspective view of a second embodiment of the backlight module of the present invention; Schematic diagram of a conventional backlight module; and g. Fig. 6 is a schematic structural view of another conventional backlight module. - ·. . . . [Description of main grade symbols] Lamp 1, 2, 25, lamp holder la 23, 33 reflector cover 10'2, 24, 34 bottom wall 11, 243 heat dissipation hole 15 opening portion 2a light guide plate 20, 22, 3, 32 backlight module 200, 300 electrode end 211 longitudinal side surface 221 light entrance surface 222, 3c, 322 plug surface 231 plug portion 232 '235, 335 groove 236,336 sidewall 334 contacting region 241' contact portion 234 opening 233 recessed portion 242 2410, 2420 2430 jack reflector 4