200809338 九、發明說明： 【發明所屬之技術領域】 . 本發明係有關於一種背光模組及液晶顯示裴置，且特別有關 於一種具有散熱結構之背光模組及液晶顯示裝置。 【先前技術】 由於液晶顯示器(Liquid crystal display，LCD)具有省電、高書， 質、空間利用效率佳，且相較於陰極射線管顯示器(Cath〇de ray加以 馨display，CRT)更具有低輻射的優點，因此近年來液晶顯示器已廣 泛應用於眾多具有成長潛力的電子產品，例如監視器(m〇nit〇r)、 筆記型電腦、數位相機、以及投影機等等。 由於液晶顯示器為非自發光，因此背光模組可謂為液晶顯示 器的關鍵零組件，其主要功能在於提供亮度且分佈均勻的光源， 以使液晶顯示器能夠正常顯示影像。 第一圖為一習知利用平面燈板之液晶顯示裝置1()的剖面示意 馨圖。液晶顯示裝置10包含一液晶顯示面板11、以及一背光模組 12。背光模組12包含一背板12卜一平面燈板122、以及一擴散 板123，其中平面燈板122乃置於背板121上，並可為一平面光 源’具有全面發光之特性，而擴散板123則設於平面燈板122之 上’以將平面燈板122產生之光源散射至液晶顯示面板11。 然而平面燈板122乃經電極放電而與氣體形成電漿，再放出 電子激發螢光粉而發光，輸入的電能除轉換為光源外，其餘皆以 熱能的形式發射，而當面板尺寸越來越大，需要的顯示輝度越來 越亮時’平面燈板122的發熱量也越來越高。原始的平面燈板散 5 200809338 ^又相於平面燈板後方設計—自然對流冷卻通道，並且 數個通氣孔以供氣體進出，麸& /、復 限，且在自然餘it況下的=4自然對流進行冷卻的效果有 w L ; 的進風口溫度較低，而出風口溫度較高， 〆面：f板朗之熱膨脹不均，最後導致玻璃嚴重變 以符合液晶顯的之高書質、$?^燈5姐散熱結構， 求，已成為-重要之課題^^^度、以及破財命…等需 【發明内容】 於上am置财散熱效能不彰以及溫度分佈不 =情形’本發_目的之―係提供—種具有散熱結構之背 組及液晶顯示裝置’設計—錢冷卻通道，並職^強 制對流，崎低平面燈板的溫度，延長使用壽命。 強 而本务明之另-目的乃提供一種具有散熱結構之背光模 液晶顯示裝置，_進風口與出風續相對擺設方式，使得平 ’咖爾_，㈣免燈板變形或 為達上述與其他目.的，本發明乃提供—種f光模組，包含： -平面燈板、_平板n位於平板與平制之通道 板包含複數觀、顺至少—開口，其中上述錢設於平板周 邊，而開口則位於平板之中間區域，且開口處係設置一風扇。' 匕另二本發明亦提供一種液晶顯示裝置H -顯示面板及 -背光模組，該顯示面板位於該背光模組之上方，該冑光模組勺 含-平面燈板、-平板、以及-位於平面燈板與平板間之通道^ 200809338 其中上述孔洞設於平板之周 且開口處係設置一風扇。 平板包含複數個孔洞與至少一開口 邊，而開口則位於平板之中間區域， 【實施方式】 本!X月係舉列—些實施例詳述如下。首先，本發明係以一 ^板ΐί模、㈣例’以制本發明所提供之散熱結構。第二A 明一實施例中一種液晶顯示裝置20的剖面示意圖。 A φ 1 =置20係包含一液晶顯示面板22、以及一背光模組3 〇， ^月光模組30可例如為一直下式背光模组。背光模组3〇包含 Ρ，二、%平板34、以及一位於平面燈板32和平板34 36平面燈板32包含一上板321、一下板322、以及電 ° 八中上板321和下板322可例如為玻璃之材質。 月光模、卫3〇更包含一擴散片40位於液晶顯示面板22和平面 ^反^之間’用來將平面燈板32所產生之平面光源散射至液晶 =板22，以及至少一光學膜片42位於擴散片40與液晶顯示 面板22之間，明加視角之亮度。 第一 B圖係顯示此實施例中之液晶顯示裝置2〇的背面俯視 回。其中，平板34包含有複數個孔洞50、以及一開口52，而一 54則位於平板34之開口 52處，其可藉由-支撐部56將此 =1 54固定於平板34上。孔洞5〇、以及開口 乃作為空氣進 之門戶’其中開口 52乃較佳位於平板34之中間區域，而孔洞 5〇則位於平板34的周邊，且上述孔洞50與開口 52間的距離大 200809338 抵相等。值得注意的是，本發明上述之孔洞5〇、以及開口52之 形狀、大小、間距、和數量係可根據實際不同需要而改變，本發 明乃並非以此為限。 x 在此實施例中，位於平板34周邊之孔洞5〇乃較佳作為進風 孔’而平板34之中間區域則利用風扇54形成一負壓，使得空氣 經由孔洞5G流人平板32解板34辭面之_通道％， 再經由風扇54所在之開口 52處排出。如此一來，經由孔洞％ 進人通道36的冷线可敵平祕板32的，並且均句地通 鲁過整個平面燈板32之表面，使得平面燈板32之表面溫度分佈平 均。通運36乃作為-空氣冷卻通道，其平面燈板32與平板％ 兩平面夾層之間的高度可約介於5_1〇毫米之間，而風扇54所在 之開口 52處則較佳作為出風口，然而.本發明乃並非以此為限， 亦即此技藝人士可根據其他獨需求和考量，例如依照風壓大小 或面板尺寸而改變平碰板32解板34醉喊狀間的通道 36高度’亦或者將平板34中間區域之開口 52作為進風口。 由於平面燈板32之下板322可為-玻璃材質，為加強散熱效 果，可於平面燈板32之下板切處設置-散熱板38，其可為-散熱材質’例如銘或銅。此外，參照第三A圖〜第三c圖，此散 熱板38亦可具有複數個鋸齒形、倒弓形、倒s形之散熱籍片381， 以增加散熱之面積。 >另外’隨著面板尺寸不斷增加，單顆風扇的風壓不夠足以抵 抗通道36巾的阻力導致無法抽出空氣，此時可以配置較多的風 扇以顺利將通道中的熱空氣排出。第四圖為本發明另一實施例 中’-種液晶顯示裝置的背面俯視圖，其中，相同功能的輪件係 200809338 =相同的符餘心已說_功關於略 贅述。 * 多”、、第四圖以長見比為比9單位的背光模組為例，於 平板34中|又位置设計3個開口 52以擺置風扇^， 而複數個孔洞 50則位於平板34長度較長之上下兩侧邊，且每_孔洞5()與鄰近 風扇54之相對距離乃大抵相等。如此一來，當每一組風扇％抽 出的空氣流量相等，則每—孔洞5〇之空氣進量也大致相同，空 氣將均勻地流經平面燈板32之下表面，使溫度分佈平均。 籲 帛五圖細林發明又-實關巾H日日齡裝置的背面 俯視圖。在此實施例中，以一長寬比為16比9單位的背光模組 為例，當面板尺寸增加時，可於平板34中段位置設計6個開口 52 以擺置風扇54，並以3 X 2對稱的形式排列，而複數個孔洞5〇則 位於平板34長度較長之上下兩側邊、以及中段處，位於平板34 中段處的孔洞50亦介於上下兩列開口 52之間，且上述孔洞5〇 與鄰近風扇54之距離係大抵相等。進風口的位置可位於平板的 周邊或環繞風扇的周圍，其形狀、、大小、間距和數量係可根據不 馨同需求或實際情況而改變，本發明乃並非以此為限。 以32吋燈板實際進行試驗，在室溫為25°C下，分別利用紅外 線熱顯像儀比較未加裝風扇而僅利用自然對流進行冷卻(散熱孔位 於平板上下兩側邊）、加裝3顆風扇(參照第四圖）、以及加裝6顆 風扇（參照弟五圖)之燈板正面的溫度分佈。結果顯示，未加裝風 扇而僅利用自然對流進行冷卻的溫度分佈較不均勻，其溫度分佈 範圍介於50-70C之間’且高溫集中於燈板中央；加裳3顆風扇 之燈板的溫度則較為均勻，而加裝6顆風扇之燈板的整面溫度分 200809338 佈G間不僅縮減至50-60°C之間，且其最高溫度相較於利用自然 對流的方式而言亦下降了約1(TC。 本發明利用簡單的幾何設計通道，讓空氣均勻的流過燈板背 面，降低燈板溫度，並使得燈板溫度分佈均句，藉此提升燈板的 穩定性，增強顯示效果，並使得燈板的壽命得以延長。 馬例，並已揭露數個較佳 任何熟習此技藝者，在未 效改變或修飾，均應包含 ♦在下述之中料概圍内。 雖然本發明以一液晶平面顯示裝置為例 實施例如上，然其非用以限定本發明，任伸 脫離本發明示之精神下所完成之等效孩 200809338 【圖式簡單說明】 、第一圖為一習知利用平面燈板之液晶顯示裝置的剖面示意 圖， 第二A〜二B圖為本發明一實施例中一種液晶顯示裝置的 概略示意圖； 第三A〜三C圖為一具有複數個散熱鰭片之散熱板的概略示 意圖， _ 第四圖為本發明另一實施例中一種液晶顯示裝置的背面俯視 圖， 第五圖為本發明又一實施例中一種液晶顯示裝置的背两俯視 圖。 【主要元件符號說明】 / 10液晶顯不裝置 11液晶顯不面板 _ 12背光模組 121背板 122平面燈板 123擴散板 20液晶顯示裝置. 22液晶顯示面板 11 200809338 30背光模組 32平面燈板 321上板 322下板 323電極 34平板 36通道· 38散熱板 381散熱鰭片 40擴散片 42光學膜片 50孔洞 52開口 _ 54風扇 56支撐部200809338 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module and a liquid crystal display device, and more particularly to a backlight module and a liquid crystal display device having a heat dissipation structure. [Prior Art] Since the liquid crystal display (LCD) has power saving, high book quality, good space and space utilization efficiency, and is lower than that of a cathode ray tube display (Cath〇de ray) The advantages of radiation, in recent years, liquid crystal displays have been widely used in many electronic products with growth potential, such as monitors, notebooks, digital cameras, and projectors. Since the liquid crystal display is non-self-illuminating, the backlight module can be regarded as a key component of the liquid crystal display, and its main function is to provide a light source with uniform brightness and uniformity, so that the liquid crystal display can display images normally. The first figure is a schematic cross-sectional view of a conventional liquid crystal display device 1 () using a flat panel. The liquid crystal display device 10 includes a liquid crystal display panel 11 and a backlight module 12. The backlight module 12 includes a back plate 12, a flat light board 122, and a diffuser plate 123. The flat light board 122 is disposed on the back board 121, and can be a planar light source having full-luminous characteristics and diffusing. The plate 123 is disposed above the planar light panel 122 to scatter the light source generated by the planar light panel 122 to the liquid crystal display panel 11. However, the planar light board 122 is discharged by the electrode to form a plasma with the gas, and then emits the electron-excited phosphor powder to emit light. The input electric energy is converted into a light source, and the rest is emitted in the form of heat energy, and when the panel size is more and more When the required display brightness is getting brighter and brighter, the heat of the flat panel 122 is also getting higher and higher. The original flat panel is scattered 5 200809338 ^There is also a design behind the flat panel - natural convection cooling channel, and several vents for gas in and out, bran & /, complex, and in the natural situation = 4 The effect of natural convection cooling is w L ; the temperature of the air inlet is lower, and the temperature of the air outlet is higher, the thermal expansion of the surface of the slab: f plate is uneven, and finally the glass is severely changed to meet the high quality of the liquid crystal display. , $?^ Lamp 5 sister heat dissipation structure, seeking, has become an important topic ^^^ degrees, and breaking the wealth of life, etc. [invention content] On the am, the financial performance is not good and the temperature distribution is not = the situation 'this The purpose of the _ the purpose is to provide a kind of heat-reducing structure of the back group and the liquid crystal display device 'design - money cooling channel, and work ^ forced convection, the temperature of the low-profile flat panel, extend the service life. The purpose of the invention is to provide a backlight mode liquid crystal display device with a heat dissipation structure, _ the air inlet and the air outlet are oppositely arranged, so that the flat 'Gal _, (4) free of the light board deformation or to achieve the above and other The invention provides a f-light module comprising: - a flat panel, a flat panel, a flat panel, and a flat channel panel comprising a plurality of views, at least an opening, wherein the money is disposed at a periphery of the panel. The opening is located in the middle of the flat plate, and a fan is arranged at the opening. The second invention also provides a liquid crystal display device H-display panel and a backlight module. The display panel is located above the backlight module, and the dimming module spoon comprises a flat panel, a flat panel, and The channel between the flat light board and the flat panel ^ 200809338 wherein the hole is arranged on the circumference of the flat plate and a fan is arranged at the opening. The flat plate includes a plurality of holes and at least one open side, and the opening is located at an intermediate portion of the flat plate. [Embodiment] This is an embodiment of the present invention. First, the present invention is a heat dissipation structure provided by the present invention. Second A is a schematic cross-sectional view of a liquid crystal display device 20 in an embodiment. A φ 1 = 20 is a liquid crystal display panel 22 and a backlight module 3 〇, and the moonlight module 30 can be, for example, a direct-lit backlight module. The backlight module 3 includes a cymbal, a second, a slab 34, and a flat panel 32 and a flat panel 34. The planar panel 32 includes an upper panel 321 , a lower panel 322 , and an upper panel 321 and a lower panel . 322 can be, for example, a material of glass. The moonlight mold and the sturdy mold 40 further comprise a diffusion sheet 40 between the liquid crystal display panel 22 and the surface of the liquid crystal display panel 22 for scattering the planar light source generated by the planar light panel 32 to the liquid crystal=plate 22, and at least one optical film. 42 is located between the diffusion sheet 40 and the liquid crystal display panel 22, and the brightness of the viewing angle is increased. The first B diagram shows the back surface of the liquid crystal display device 2 in this embodiment as seen from the back. The flat plate 34 includes a plurality of holes 50 and an opening 52, and a 54 is located at the opening 52 of the flat plate 34, which can be fixed to the flat plate 34 by the support portion 56. The hole 5 〇 and the opening serve as a gateway for the air. The opening 52 is preferably located in the middle of the flat plate 34, and the hole 5 位于 is located at the periphery of the flat plate 34, and the distance between the hole 50 and the opening 52 is large. equal. It should be noted that the shape, size, spacing, and number of the above-mentioned holes 5 and openings 52 of the present invention may be changed according to actual needs, and the present invention is not limited thereto. x In this embodiment, the hole 5〇 located at the periphery of the flat plate 34 is preferably used as the air inlet hole' and the middle portion of the flat plate 34 is formed with a negative pressure by the fan 54, so that the air flows through the hole 5G to the flat plate 32. The _% of the channel is discharged through the opening 52 where the fan 54 is located. In this way, the cold line entering the passage 36 through the hole % can enemies the surface of the secret panel 32, and uniformly passes through the surface of the entire flat panel 32, so that the surface temperature of the flat panel 32 is evenly distributed. The transport 36 is an air cooling passage, and the height between the flat panel 32 and the flat panel may be about 5_1 mm, and the opening 52 of the fan 54 is preferably used as an air outlet. The present invention is not limited thereto, that is, the skilled person can change the height of the channel 36 of the splash panel 32 in the drunken manner according to other unique needs and considerations, for example, according to the wind pressure size or the panel size. Alternatively, the opening 52 in the middle portion of the flat plate 34 is used as an air inlet. Since the lower plate 322 of the flat panel 32 can be made of -glass material, in order to enhance the heat dissipation effect, a heat sink 38 can be disposed at the lower plate of the flat panel 32, which can be a heat dissipating material such as inscription or copper. In addition, referring to the third to third c-figures, the heat dissipation plate 38 may also have a plurality of zigzag, inverted arcuate, inverted s-shaped heat dissipation sheets 381 to increase the heat dissipation area. > In addition, as the size of the panel continues to increase, the wind pressure of the single fan is not enough to resist the resistance of the channel 36, and the air cannot be extracted. At this time, more fans can be disposed to smoothly discharge the hot air in the channel. The fourth figure is a rear plan view of a liquid crystal display device of another embodiment of the present invention, in which the wheel train of the same function is 200809338 = the same symbol is said to be omitted. *Multiple, and the fourth figure takes the long-view ratio as the 9-unit backlight module as an example. In the flat panel 34, three openings 52 are designed to position the fan ^, and the plurality of holes 50 are located on the flat plate. The length of the 34 is longer than the upper two sides, and the relative distance between each hole 5 () and the adjacent fan 54 is substantially equal. Thus, when the air flow drawn by each group of fans is equal, each hole 5 〇 The air intake is also substantially the same, and the air will flow evenly through the lower surface of the flat panel 32 to average the temperature distribution. 帛 帛 图 细 发明 发明 发明 发明 发明 发明 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实In the embodiment, a backlight module with an aspect ratio of 16 to 9 units is taken as an example. When the panel size is increased, six openings 52 can be designed in the middle position of the flat plate 34 to place the fan 54 and symmetrically 3×2. The form is arranged, and the plurality of holes 5 位于 are located on the lower side of the flat plate 34 and the lower side and the middle portion, and the hole 50 at the middle of the flat plate 34 is also interposed between the upper and lower rows of openings 52, and the hole 5 is The distance between the 〇 and the adjacent fan 54 is approximately equal. The position of the air inlet The shape, the size, the spacing and the number of the periphery of the flat plate or the surrounding of the fan may be changed according to the requirements of the same or the actual situation. The present invention is not limited thereto. The actual test is carried out with a 32-inch lamp board. At room temperature of 25 ° C, the infrared thermal imaging camera was used to compare the cooling without the fan, and only the natural convection was used for cooling (the cooling holes were located on the upper and lower sides of the flat plate), and three fans were installed (refer to the fourth figure). And the temperature distribution on the front side of the lamp panel with 6 fans (refer to the fifth figure). The results show that the temperature distribution without cooling the fan and using only natural convection is uneven, and the temperature distribution range is 50- Between 70C' and the high temperature is concentrated in the center of the light board; the temperature of the light board with 3 fans is more uniform, and the whole surface temperature of the light board with 6 fans is not reduced to 50-60. Between °C, and its maximum temperature is also reduced by about 1 (TC) compared to the way of using natural convection. The invention utilizes a simple geometric design channel to allow air to flow evenly through the back of the lamp panel, reducing the temperature of the lamp panel. , and The temperature distribution of the lamp panel is uniform, thereby improving the stability of the lamp panel, enhancing the display effect, and prolonging the life of the lamp panel. In the case of horses, several preferred ones who are familiar with the art have not been changed. Or, the modifications should be included in the following description. Although the present invention is embodied by a liquid crystal flat display device as an example, it is not intended to limit the present invention, and it may be omitted from the spirit of the present invention. The equivalent of the child 200809338 [Simplified description of the drawings], the first figure is a schematic cross-sectional view of a conventional liquid crystal display device using a flat panel, and the second A to BB diagrams are a liquid crystal display device according to an embodiment of the present invention. FIG. 3A to FIG. 3C are schematic diagrams of a heat dissipation plate having a plurality of heat dissipation fins, and FIG. 4 is a rear plan view of a liquid crystal display device according to another embodiment of the present invention, and FIG. Another front view of a liquid crystal display device in still another embodiment of the present invention. [Main component symbol description] / 10 LCD display device 11 LCD display panel _ 12 backlight module 121 back panel 122 flat panel 123 diffuser panel 20 liquid crystal display device. 22 liquid crystal display panel 11 200809338 30 backlight module 32 flat panel light Plate 321 upper plate 322 lower plate 323 electrode 34 plate 36 channel · 38 heat sink 381 heat sink fin 40 diffuser 42 optical film 50 hole 52 opening _ 54 fan 56 support