.201027164 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種液晶顯示器結構，尤其是液晶顯示器之散熱結才冓 【先前技術】.201027164 VI. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal display structure, particularly a heat dissipation junction of a liquid crystal display. [Prior Art]
❹ 第一圖為習用技術之液晶顯示器散之熱結構示意圖。參閱第 一圖，其中傳統液晶顯示器1係包括液晶模組10、背光模組20、 背面模組30以及外框40。液晶模組10包括保護玻璃u以及液晶 單元（cell)12。背光模組20包括複數個燈管21 ’背面模組30包括 電路板31、機殼33、破孔35以及風扇37。此外，該傳統液晶顯 不器1還包括一全屬背板23，該金屬背板23係位在背面模組3〇 與外框40之間。 由於背光模組20内燈管21所產生的熱會往金屬背板23聚 集，並在背面模組3G間的内部空間產生熱量，為了將此熱量排出 液晶顯示器1外，背面模組3〇設置破孔35，並在破孔35處安裝 風扇37，藉由風扇37迫使内部空間的空氣加速流動，可讓熱量排 出液晶顯示器I外。 :而’習知技術之液晶顯示器的散熱方法，其缺點是將背光 模、J3·内4¾、封’導致熱量累積在背面模組的内部空間，無法有效 地將=量排出。料背面模組上方的熱量只能靠熱傳導的方式傳 、，、則方的液阳單元或是後方之系統，細在高環境溫度的情況 下如戶外超過3〇C時，液晶單元可能發生液化’而f面模組内 的電子電職統也會贿獨定甚至是壽命降低。 、卜技術的另一項缺點為即便在背面模組内設計一個 譆:：:風扇，用以增進其排熱的效率，然而此破孔處可能會 :、麵錢因此進人液晶騎如而减魏板短路等 201027164 問題 穩 -晶顯示器的使用壽 定液二此’二要—種可以增進液晶顯示器散熱效率的裝置，以 疋H韵部的電子電路系統，並延長液 命。 【發明内容】 背光要目的係提供一種液晶顯示器之散熱結構，包括 住背她 通道以及循環風扇，其巾⑽循環通道包圍 ❹ 2模、，且’並利用猶環風扇翻部循環通道内的空氣強制循 2域不器在直立或水平毅時能夠及時將顯示ϋ上方所累 量往下方傳送(或由一側向另一側傳送)，以避免背光模 、’w所產生的熱量麵晶顯示^内累積，降低崎平均溫度 且改善液晶顯示n内部的溫度不均勻性4其，當_器在直立 擺放時，高溫多積聚在液晶顯示器上部，藉由本發明之做法即可 ^效降低背光模組内的光學膜板在上方溫度高的位置因受高熱而 黃化或脆化的機率、降低液晶受高熱職化之可紐，並提高顯 =器整體之熱傳導效率。此外，當顯示器具有保護玻璃、壓克力 或甚至疋城職面板時，祕透财觀壓克力與液晶單元間 形成-個阻隔空氣層，因此對顯示器來說至少多了兩層阻熱層而 造成對外散熱效率下降’因而可能造成液晶液化之嚴重職。為. 了增加顯示器與保護玻璃或壓克力間空氣層的散熱效率，可將前 述内部循環通道與間隔空氣層導通，使此空氣層之空氣加入内部 循環，即可有效避免此處熱量過度累積而造成液晶液化之問題。 本發明之另一目的係提供一種液晶顯示器之散熱結構，係包 括排熱通道以及排熱風扇，其中排熱通道位於背光模組内之金屬 寺板與電路板承載盒之間，由於顯示器背光模組與電路板承載盒 201027164 内之電源供應器及其它電路板為主要熱源，透過此一設計，可將 兩處熱源以熱傳導的方式傳至此-排熱通路的兩側；同時，亦可 加上散細片或其它可增加散熱面積之解決方案至排熱通道之兩 側最後，利用排熱風扇將排熱通道内的熱空氣快速排出至液晶 顯不器外，以增進散熱效率。由於背光模組及電路板承載盒之設 计乃疋70全密封，並無散熱孔之設計，因此以上之散熱解決方案 並不會使得外部灰塵或水氣進入而對液晶顯示器及電路板承載盒 内而造成光學、電子及電源系統任何影響，卻可確保整體運作 參 並不會受到熱影響而降低效能。 ^因此，本發明的液晶顯示器之散熱結構能使液晶顯示器内之上下 溫，均勻化，並增進散熱效率，減少外部灰塵或水氣進入液晶顯示器 内部造成電路系統不穩定等問題，以延長液晶顯示器的使用壽命等諸 多優點。 【實施方式】 以下配合圖式及元件符號對本發明之實施方式做更詳細的說 明，俾使熟習該項技藝者在研讀本說明書後能據以實施。 ® 參閱第二圖，本發明之液晶顯示器2之散熱結構的示意圖。該 液晶顯不器2係包括液晶模組10、背光模組5〇、背面模組6〇以 及外框40，其中該液晶模組10包括保護玻璃11與一個或複數個 液晶單元12，該背光模組5〇包括複數個燈管21、内部循環通道 51以及循環風扇53，該背面模組60包括電路板承載盒61以及複 數個電路板31 ’其中電路板31安置在電路板承載盒61上。此外， 該液晶顯示器2還包括一金屬背板23，該金屬背板係位在背面模 組60與外框40之間。 本案之液晶顯示器2内主要有兩大熱源，一是來自背光模組 201027164 5〇，由複數個燈管21所產生的熱，另一則是來自背面模組6〇，由 電路板31傳至電路板承載盒&所產生的熱。 如第二圖所示，用複數個支撐裝置55將背光模組5〇與金屬背 板23隔開形成一通道，且液晶模組1〇與背光模組50之間以及外 框40與背光模組5〇之間具有一間隙，而該通道與該間隙形成一 内部循環通道51 ’此外該内部循環通道51係包圍住背光模組5〇 並且與外界空氣隔離。 在内部循環通道51中，具有一個或複數個之循環風扇53，將 0 此循環風扇53安置在内部循環通道51的上部、下部或其他位置， 循環風扇53的數量依液晶顯示器2的尺寸大小而定^循環風扇53 的作用係將内部循環通道51内的熱空氣強制循環，其循環方向如 箭頭57所指，以改善液晶顯示器2之上部、下部或左右兩側之間 的溫度不均勻性。 此外，該液晶顯示器2還包括一排熱通道63以及一排熱風扇 幻，其中該排熱通道幻係位於金屬背板μ與電路板承載盒61之 間，此外’排熱通道63頂部有一個或複數個排熱孔(圖中未顯示）， Q 使排熱通道63裡的熱空氣可直通外部空氣，且由於排熱通道63 位於金屬背板23與電路板承載盒61之間，灰塵或水氣並不至於 經由排熱孔接觸到電路板或液晶面板造成短路。此外，排熱通道 63内亦可設置其它散熱襄置如散熱韓片等(圖中未顯示)，以增加散 熱之面積。此例之排熱通道63為由下往上之方向，實作上，而排 熱通道也可以為左右方向。在該排熱通道63中，具有一個或複數 個之排熱風扇65 ’此排熱風扇65安裝在排熱通道63之頂部、底 部或兩側位置(當賴通勒左右方㈣），視吸人或邮而定；排 熱風扇65的數量則視液晶顯示器2尺寸大小而定。由於電路板承 載盒61内之電路板31會產生熱量，經電路板承載盒61，會將此 201027164 熱量傳至排熱通道63中；同時，液晶顯示器2内燈管η所產生 的熱量’經金屬背板23將熱量傳至排熱通道63中，故利用排熱 風扇65將排熱通道63_熱量細，排至液晶顯綠2外部， 以增進其散熱效率，並且穩定電路板31系統。 f面模組6〇為密封空間，其散熱結構不需要外加排熱孔，防 止外部空氣之灰塵或水氣進人液晶顯示器内，影響内部電路系統。 在液晶模組10内’保護玻璃u與液晶單元12之間非連續地 配置複數個間隔物13，以隔開保護玻璃u與液晶單元12並保持 -間隔空氣層I4,並使內部循環通道S1與關賊氣層14相通， 使内部散熱循環能擴及此·㈣，增加此空氣層之散熱效率， 以避免大量熱量累積在此間隔空氣層上方而造成液晶液化，並進 一步提高顯示器的穩定性與可靠度。 以上所述者僅為用以解釋本發明之較佳實施例，並非企圖據以對 本發明做任何形式上之關，是以，凡有在_之發明精神下所作有 關本發明之任何修飾或變更，皆仍應包括在本剌意_護之範嘴。 【圖式簡單說明】 第一圖為習用技術之液晶顯示器之散熱結構示意圖。 第二圖為液晶顯示器之散熱結構示意圖。 【主要元件符號說明】 1傳統液晶顯示器 2液晶顯示器 1〇液晶模組 U保護玻璃 12液晶單元 13間隔物 201027164 14間隔空氣層 20背光模組 21燈管 23金屬背板 30背面模組 31電路板 33機殼 35破孔 37風扇 40外框 50背光模組 51内部循環通道 53循環風扇 55支撐裝置 57箭頭 60背面模組 61電路板承載盒 ❹ 63排熱通道 65排熱風扇❹ The first picture shows the thermal structure of the liquid crystal display in the prior art. Referring to the first figure, the conventional liquid crystal display 1 includes a liquid crystal module 10, a backlight module 20, a back module 30, and an outer frame 40. The liquid crystal module 10 includes a protective glass u and a liquid crystal cell 12. The backlight module 20 includes a plurality of lamps 21'. The back module 30 includes a circuit board 31, a casing 33, a hole 35, and a fan 37. Further, the conventional liquid crystal display 1 further includes a full back plate 23 which is positioned between the rear module 3A and the outer frame 40. Since the heat generated by the lamp tube 21 in the backlight module 20 is concentrated toward the metal back plate 23, and heat is generated in the internal space between the back module 3G, in order to discharge the heat out of the liquid crystal display 1, the back module 3 is set. The hole 35 is broken, and the fan 37 is installed at the hole 35, and the air 37 is forced to flow in the internal space by the fan 37, so that heat can be discharged outside the liquid crystal display 1. The heat dissipation method of the liquid crystal display of the prior art has the disadvantage that heat is accumulated in the internal space of the back module by the backlight, J3, inner, and sealing, and the amount cannot be effectively discharged. The heat above the back module of the material can only be transmitted by heat conduction, and then the liquid liquid unit or the rear system. When the temperature exceeds 3 °C in the case of high ambient temperature, the liquid crystal unit may be liquefied. 'The electronic and electrical system in the f-face module will also be bribed or even reduced in life. Another disadvantage of the technology is that even if a fan is designed in the back module to increase the efficiency of heat removal, the hole may be: Reduce the short circuit of the Wei plate, etc. 201027164 Problem Stabilization - The use of the crystal display of the liquid crystal display. This is a device that can improve the heat dissipation efficiency of the liquid crystal display, and to extend the liquid life of the rhyme. SUMMARY OF THE INVENTION The purpose of the backlight is to provide a heat dissipation structure of the liquid crystal display, including the back channel and the circulation fan, the towel (10) circulation channel surrounds the 模 2 mode, and 'uses the air in the circulation channel of the circumnance fan Forced to follow the 2 field, in the upright or horizontal time, can timely transfer the amount accumulated above the display ( downward (or from one side to the other side) to avoid the heat surface crystal display generated by the backlight module and 'w Accumulate, reduce the average temperature of the average and improve the temperature non-uniformity inside the liquid crystal display. 4 When the _ device is placed in an upright position, the high temperature accumulates on the upper portion of the liquid crystal display, and the backlight can be reduced by the method of the present invention. The optical film in the module is likely to be yellowed or embrittled by high heat at a position where the temperature is high above the upper portion, and the heat transfer efficiency of the liquid crystal is lowered, and the overall heat transfer efficiency of the display device is improved. In addition, when the display has a protective glass, acrylic or even a professional panel of the city, a transparent layer of air is formed between the acrylic and the liquid crystal unit, so that at least two layers of the heat-resistant layer are provided for the display. As a result, the efficiency of external heat dissipation is reduced, which may cause serious liquidity in liquid crystal. In order to increase the heat dissipation efficiency of the air layer between the display and the protective glass or the acrylic, the internal circulation channel and the air layer are connected to each other, so that the air of the air layer is added to the internal circulation, thereby effectively avoiding excessive heat accumulation here. The problem of liquid crystal liquefaction. Another object of the present invention is to provide a heat dissipation structure of a liquid crystal display, comprising a heat removal channel and a heat exhaust fan, wherein the heat removal channel is located between the metal temple plate and the circuit board carrying case in the backlight module, due to the display backlight mode The power supply and other circuit boards in the group and circuit board carrying case 201027164 are the main heat sources. Through this design, two heat sources can be heat-transmitted to both sides of the heat-discharging path. A thin piece or other solution that can increase the heat dissipation area to both sides of the heat removal passage Finally, the hot air in the heat removal passage is quickly discharged to the outside of the liquid crystal display by the heat exhaust fan to improve the heat dissipation efficiency. Since the backlight module and the circuit board carrying case are designed to be fully sealed and have no venting holes, the above thermal solution does not allow external dust or moisture to enter the liquid crystal display and the circuit board carrying case. Internally, any impact on the optical, electronic, and power systems can ensure that overall operational participation is not affected by heat and degraded performance. Therefore, the heat dissipation structure of the liquid crystal display of the present invention can lower the temperature and uniformity in the liquid crystal display, and improve the heat dissipation efficiency, and reduce the external circuit dust or moisture entering the liquid crystal display to cause instability of the circuit system, etc., to extend the liquid crystal display. The life expectancy and many other advantages. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in more detail below with reference to the drawings and the <RTIgt; ® Referring to the second figure, a schematic diagram of the heat dissipation structure of the liquid crystal display 2 of the present invention. The liquid crystal display unit 2 includes a liquid crystal module 10, a backlight module 5〇, a back module 6〇, and an outer frame 40. The liquid crystal module 10 includes a protective glass 11 and one or more liquid crystal cells 12, and the backlight The module 5A includes a plurality of lamps 21, an internal circulation passage 51, and a circulation fan 53, the back module 60 including a circuit board carrying case 61 and a plurality of circuit boards 31', wherein the circuit board 31 is disposed on the circuit board carrying case 61 . In addition, the liquid crystal display 2 further includes a metal backing plate 23 that is positioned between the back mold group 60 and the outer frame 40. There are two main heat sources in the liquid crystal display 2 of the present invention. One is from the backlight module 201027164 5〇, the heat generated by the plurality of lamps 21, and the other is from the back module 6〇, which is transmitted from the circuit board 31 to the circuit. The board carries the heat generated by the box & As shown in the second figure, the backlight module 5 is separated from the metal back plate 23 by a plurality of supporting devices 55 to form a channel, and the liquid crystal module 1 and the backlight module 50 and the outer frame 40 and the backlight module are There is a gap between the groups 5〇, and the channel forms an internal circulation passage 51 with the gap. Further, the internal circulation passage 51 surrounds the backlight module 5〇 and is isolated from the outside air. In the internal circulation passage 51, there are one or a plurality of circulating fans 53, and the circulating fan 53 is placed at the upper, lower or other positions of the internal circulation passage 51, and the number of the circulating fans 53 depends on the size of the liquid crystal display 2. The function of the circulating fan 53 is to forcibly circulate the hot air in the internal circulation passage 51, and its circulation direction is indicated by an arrow 57 to improve the temperature unevenness between the upper portion, the lower portion or the left and right sides of the liquid crystal display 2. In addition, the liquid crystal display 2 further includes a row of hot channels 63 and a row of thermal fan phantoms, wherein the heat venting channel is located between the metal backing plate μ and the circuit board carrying case 61, and further has a top of the heat exhausting passage 63 Or a plurality of heat exhaust holes (not shown), Q allows the hot air in the heat exhaust passage 63 to pass through the outside air, and since the heat exhaust passage 63 is located between the metal back plate 23 and the circuit board carrying case 61, dust or The moisture does not cause a short circuit due to contact with the circuit board or the liquid crystal panel via the heat exhaust holes. In addition, other heat dissipating devices such as heat sinks (not shown) may be disposed in the heat exhausting passage 63 to increase the area of heat dissipation. The heat removal passage 63 of this example is in the direction from the bottom to the top, and the heat removal passage can also be in the left and right direction. In the heat exhausting passage 63, there are one or a plurality of heat exhausting fans 65'. The heat exhausting fan 65 is installed at the top, bottom or both sides of the heat exhausting passage 63 (when the Layton is left and right (four)), and the suction is sucked. The number of the heat exhaust fan 65 depends on the size of the liquid crystal display 2. Since the circuit board 31 in the circuit board carrying case 61 generates heat, the heat of the 201027164 is transmitted to the heat exhausting passage 63 via the circuit board carrying case 61; meanwhile, the heat generated by the light tube η in the liquid crystal display 2 is The metal backing plate 23 transfers the heat to the heat exhausting passage 63. Therefore, the heat exhausting passage 63 is used to heat the heat exhausting passage 63_ to the outside of the liquid crystal green 2 to improve the heat dissipation efficiency and stabilize the circuit board 31 system. The f-face module 6〇 is a sealed space, and the heat dissipation structure does not need to be provided with a heat-dissipating hole to prevent dust or moisture from the outside air from entering the liquid crystal display, thereby affecting the internal circuit system. A plurality of spacers 13 are discontinuously disposed between the protective glass u and the liquid crystal cell 12 in the liquid crystal module 10 to separate the protective glass u from the liquid crystal cell 12 and to maintain the air layer I4, and to make the internal circulation channel S1 It communicates with the thief gas layer 14 to expand the internal heat dissipation cycle. (4) Increase the heat dissipation efficiency of the air layer to avoid a large amount of heat accumulating above the interval air layer to cause liquid crystal liquefaction and further improve the stability of the display. With reliability. The above is only a preferred embodiment for explaining the present invention, and is not intended to be in any form to modify the present invention. Any modification or alteration of the present invention made in the spirit of the invention. , should still be included in the 剌 _ _ Guardian mouth. [Simple description of the diagram] The first figure is a schematic diagram of the heat dissipation structure of the liquid crystal display of the conventional technology. The second figure is a schematic diagram of the heat dissipation structure of the liquid crystal display. [Main component symbol description] 1 conventional liquid crystal display 2 liquid crystal display 1 〇 liquid crystal module U protective glass 12 liquid crystal unit 13 spacer 201027164 14 interval air layer 20 backlight module 21 lamp tube 23 metal back plate 30 back module 31 circuit board 33 casing 35 broken hole 37 fan 40 outer frame 50 backlight module 51 internal circulation channel 53 circulation fan 55 support device 57 arrow 60 back module 61 circuit board carrying box ❹ 63 exhaust hot channel 65 exhaust fan