1318712 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種背光模組及包含該背光模組之液晶顯 示裝置’特別是一種具有散熱結構之背光模組及包含該背 光模組之液晶顯示裝置。 【先前技術】 參考圖1及圖2，分別顯示習知側光式背光模組之立體分 解示意圖及組合後之局部剖視示意圖。該習知側光式背光 模組1包括一保護片（protector) U、複數個光學膜12、一導 光板（light guide plate)13、一 反射片（reflect〇r)14、一膠框 (housing)15、一燈管反射罩（ianip reflector)16、二燈管 17 及一燈管蓋（lamp cover) 18。 該導光板13具有一第一表面131、一第二表面132及一侧 面133，該側面133係為一入光面，用以接受來自該等燈管 17之光線。該第一表面131係為一出光面，用以傳送出該 導光板13内之光線。該等光學膜丨2(例如增亮膜或擴散膜 4)係貼合於該導光板13之第一表面131，用以調整該導光 板13所傳送出之光線。該保護片11係貼合於該等光學膜12 之上’用以保護該等光學膜12。該反射片14係貼合於該導 光板13之第二表面132，用以反射該等燈管17所發出光 線。 該燈管反射罩16係與該導光板13之側面133形成一空腔 19該等燈官17係為冷陰極螢光燈管（c〇id cath〇de fluorescent lamp，CCFL)，用以提供光線，且該等燈管17 94327TW_無劃線替換頁 _6_ 1318712 ， 係位於該空腔19内。該燈管蓋18係位於該燈管反射罩16之 外，該燈管蓋18具有一承接部181及一散熱部182,該承接 部181係用以承接該燈管反射罩16，該散熱部182係平貼於 該反射片14，用以發散該等燈管17所產生之熱。該膠框15 . 大致上係為一矩形框體’用以固定該導光板13、該反射片 14、該燈管反射罩16及該燈管蓋18。 參考圖3,顯示習知液晶顯示裝置之液晶面板之示意 圖。該液晶面板4係位於該背光模組1之上方，由該膠框1 5 所承載。該液晶面板4包括一彩色濾光（CF)基板41、一薄 膜電晶體（TFT)基板42、一液晶層43、一第一偏光板 (poladzer)44及一第二偏光板45。該彩色濾光基板41係位 於該薄膜電晶體基板42上方，且其二者間夾設該液晶層 43。該第一偏光板44係貼附於該彩色濾光基板41上方，該 第二偏光板45係貼附於該薄膜電晶體基板42之下方。 習知液晶顯示裝置作動一段時間後該第一偏光板44及該 | 第二偏光板45會因熱能之產生而提高其溫度，且影響二者 間偏光方向之正交性。量測該第一偏光板44及該第二偏光 板45之溫度之方式如下。 參考圖4，顯不習知液晶面板中第一偏光板之溫度量測 位置不意圖。在圖4中，量測位置ρι係位於該第一偏光板 44之左上方，量測位置p3係位於該第一偏光板料之右上 方’ ϊ測位置P2係位於該量測位置ρι及量測位置p3中間， 里測位置P5係位於s亥第—偏光板44之中央，量測位置、 p8、P9係最接近該等燈管17。 94327TW一無劃線替換頁 1318712 參考圖5，顯示習知液晶面板中第二偏光板之溫度量測 位置示意圖。在圖5中，量測位置P12係位於該第二偏光板 45之左上方’量測位置pi〇係位於該第二偏光板45之右上 方’量測位置P11係位於該罝測位置p.l 2及量測位置p 1 〇中 間’量測位置P14係位於該第二偏光板45之中央，量測位 置P18、P17、P16係最接近該等燈管Π。 參考表la至Id，分別顯示習知液晶顯示裝置作動3〇分鐘 後該第一偏光板及該第二偏光板之溫度、溫差及溫差均勻 度。表1 a係顯示該第一偏光板44在不同位置之溫度，表1 b 係顯示該第二偏光板45在不同位置之溫度，表卜係顯示在 不同相對位置該第一偏光板44與該第二偏光板45二者之溫 度差’例如Δ1係量測位置P1及量測位置P12之溫度差，Δ3 係量測位置Ρ3及量測位置ρΐ〇之溫度差。表ld係顯示表卜 中不同位置之溫度差與中央之溫度差（Δ5)間之均勻度。 業經發現，當該習知液晶顯示裝置作動3〇分鐘後而以暗 態畫面顯示時，在溫度均勻度大於21〇%或是小於_21〇%時 之位置（例如量測位置Ρ7、Ρ8、ρ9)其顯示會偏白（即白污現 象）’這是因為在該習用背光模組1中，由於該燈管蓋18之 散熱部182所產生之散熱效果不佳（包括散熱速率低及散熱 不均勻），因此當該液晶顯示裝置作動一定時間（約3 〇分鐘） 之後，該第一偏光板44及該第二偏光板45間溫差不均勻， 進而I響—者間偏光方向之正交性。因此在該液晶顯示裝 置之顯示區域靠近該等燈管17之地方（量測位置ρ7、ρ8、 Ρ9)會出現一偏白區域，造成畫面不美觀。為了解決此一 94327TW—無劃線替換頁 1318712 問題，習知之方法為延長該燈管蓋18之散熱部182，以增 加散熱面積，然而此方法會增加原料成本，進而提高該背 光模組1之整體造價，而且增加該背光模組丨之重量。 因此’有必要提供-創新且富進步性的f光模組及包含 該背光模組之液晶顯示裝置，以改善上述問題。 【發明内容】 本發明之主要目的係提供一種背光模组，其包括：一導 光板、-燈管反射罩、至少一燈管及一燈管蓋。該導光板 具有-第一表面、一第二表面及一側面，該側面係為一入 光面。該燈管反射罩係與該導光板之側面形成一空腔。該 燈管係位於該空㈣。該燈管蓋係位於該燈管反射罩之 外，用以發散該燈管所產生之熱，該燈管蓋具有一凹部及 一散熱區域，其中該凹部伤田μ u ρ係用以使該散熱區域及該導光板 第二表面間形成一間隙，且該凹部上開設有複數個第一透 孔，該散熱區域上開設有複數個第二透孔’其中該燈管蓋 母早位面積中該等第二透孔之開孔面積總和所佔之比例越 通離該燈管越大。藉此，可達到散熱速率高及散熱均勾之 功效，而且本發明之背光模組應用於—液晶顯示裝置時， 不會產生白污現象。 【實施方式】 參考圖6及圖7，分別顯示本發明第—實施例側光式背光 模組之立體分解示意圖及組合後之局部剖視示意圖。本實 施例之側光式背光模組2包括— 22' -ΑΜΊή24 、個光學膜 射片24、—膠框25、一燈管反射罩 94327TW一無劃線替換頁 9· 1318712 %、二燈管27及一燈管蓋28。該背光模組2係位於一液晶 顯不裝置之液晶面板之下方。該導光板23具有一第一表面 231、一第二表面232及—侧面233，該侧面233係為一入光 面，用以接受來自該等燈管27之光線。該第一表面231係 為一出光面，用以傳送出該導光板23内之光線。該等光學 膜22(例如增亮膜或擴散膜等）係貼合於該導光板23之第一 表面231，用以調整該導光板23所傳送出之光線。該保護 片21係貼合於該等光學膜22之上，用以保護該等光學膜 22。該反射片24係貼合於該導光板23之第二表面232，用 以反射該等燈管2 7所發出光線。 s亥燈官座反射罩26係與該導光板23之側面233形成一空 腔29。該等燈管27係為冷陰極螢光燈管或是發光二極體燈 官（LED light bar)，用以提供光線，且該等燈管27係位於 該空腔29内。該燈管蓋28係位於該燈管反射罩26之外，用 以發散該等燈管27所產生之熱。該膠框25大致上係為一矩 形框體，用以承載該液晶面板且固定該導光板23、該反射 片24、該燈管反射罩26及該燈管蓋28。 參考圖8 ’顯示本發明第一實施例側光式背光模組中之 燈管蓋之立體示意圖。請同時參考圖7，該燈管蓋28具有 一承接部281、一凹部282及一散熱區域283。該承接部281 係用以承接該燈管反射罩26。該凹部282係由一第一彎折 部2821及一第二彎折部2822所構成，該第一彎折部2821係 連接該承接部281，該第二彎折部2822係連接該散熱區域 283。該凹部282係用以使該散熱區域283及該反射片24間 94327TW_無劃線替換頁 -10- 1318712 形成一間隙30 以供空氣流動 有複數個第一透孔3 1 二透孔32。 該第二彎折部2822上開 該散熱區域283上開設有複數個 設 第1318712 IX. Description of the Invention: The present invention relates to a backlight module and a liquid crystal display device including the same, in particular, a backlight module having a heat dissipation structure and a liquid crystal including the same Display device. [Prior Art] Referring to FIG. 1 and FIG. 2, respectively, a schematic diagram of a stereoscopic decomposition of a conventional side-lit backlight module and a partial cross-sectional view of the combination are shown. The conventional edge-lit backlight module 1 includes a protector U, a plurality of optical films 12, a light guide plate 13, a reflective sheet 14, and a housing. 15) An ianip reflector 16, a second lamp 17 and a lamp cover 18. The light guide plate 13 has a first surface 131, a second surface 132 and a side surface 133. The side surface 133 is a light incident surface for receiving light from the tubes 17. The first surface 131 is a light exiting surface for transmitting light from the light guide plate 13. The optical film 丨 2 (for example, the brightness enhancement film or the diffusion film 4) is attached to the first surface 131 of the light guide plate 13 for adjusting the light transmitted by the light guide plate 13. The protective sheet 11 is attached to the optical film 12 to protect the optical film 12. The reflective sheet 14 is attached to the second surface 132 of the light guide plate 13 for reflecting the light emitted by the tubes 17. The lamp reflector 16 forms a cavity 19 with the side 133 of the light guide plate 13. The lamp 17 is a cold cathode fluorescent lamp (CCFL) for providing light. And the lamps 17 94327TW_ no scribe line replacement page _6_ 1318712 are located in the cavity 19. The lamp tube cover 18 is located outside the lamp tube reflector 16. The lamp tube cover 18 has a receiving portion 181 and a heat dissipating portion 182 for receiving the lamp tube reflector 16, the heat dissipating portion. The 182 is attached to the reflective sheet 14 for dissipating the heat generated by the tubes 17. The plastic frame 15 is substantially a rectangular frame for fixing the light guide plate 13, the reflection sheet 14, the tube reflection cover 16, and the lamp cover 18. Referring to Fig. 3, there is shown a schematic view of a liquid crystal panel of a conventional liquid crystal display device. The liquid crystal panel 4 is located above the backlight module 1 and is carried by the plastic frame 15 . The liquid crystal panel 4 includes a color filter (CF) substrate 41, a thin film transistor (TFT) substrate 42, a liquid crystal layer 43, a first polarizer 44 and a second polarizer 45. The color filter substrate 41 is positioned above the thin film transistor substrate 42 with the liquid crystal layer 43 interposed therebetween. The first polarizing plate 44 is attached to the color filter substrate 41, and the second polarizing plate 45 is attached to the lower surface of the thin film transistor substrate 42. After the liquid crystal display device is operated for a period of time, the first polarizing plate 44 and the second polarizing plate 45 increase the temperature due to the generation of thermal energy, and affect the orthogonality of the polarization directions therebetween. The manner of measuring the temperatures of the first polarizing plate 44 and the second polarizing plate 45 is as follows. Referring to Fig. 4, it is not known that the temperature measurement position of the first polarizing plate in the liquid crystal panel is not intended. In FIG. 4, the measurement position ρι is located on the upper left side of the first polarizing plate 44, and the measurement position p3 is located on the upper right side of the first polarizing plate material. The measurement position P2 is located at the measurement position ρι and the amount. In the middle of the measurement position p3, the measurement position P5 is located at the center of the shai-polarization plate 44, and the measurement position, p8, and P9 are closest to the lamps 17. 94327TW A line-free replacement page 1318712 Referring to Figure 5, there is shown a schematic diagram of the temperature measurement position of the second polarizing plate in the conventional liquid crystal panel. In FIG. 5, the measurement position P12 is located at the upper left of the second polarizing plate 45. The measurement position pi is located at the upper right of the second polarizing plate 45. The measurement position P11 is located at the measurement position pl 2 . And the measurement position p 1 〇 middle 'measurement position P14 is located in the center of the second polarizing plate 45, and the measurement positions P18, P17, and P16 are closest to the lamp tubes. Referring to Tables la to Id, the temperature, temperature difference, and temperature difference uniformity of the first polarizing plate and the second polarizing plate after the conventional liquid crystal display device is operated for 3 minutes are respectively displayed. Table 1 a shows the temperature of the first polarizing plate 44 at different positions, and Table 1 b shows the temperature of the second polarizing plate 45 at different positions, and the table shows the first polarizing plate 44 at different relative positions. The temperature difference between the second polarizing plates 45 is, for example, Δ1 is the temperature difference between the measurement position P1 and the measurement position P12, and Δ3 is the temperature difference between the measurement position Ρ3 and the measurement position ρΐ〇. Table ld shows the uniformity between the temperature difference between the different positions in the table and the central temperature difference (Δ5). It has been found that when the conventional liquid crystal display device is displayed for 3 minutes and then displayed in a dark state screen, the position at a temperature uniformity greater than 21〇% or less than _21〇% (for example, the measurement position Ρ7, Ρ8, Ρ9) The display may be white (ie, white stain). This is because in the conventional backlight module 1, the heat dissipation effect of the heat dissipation portion 182 of the lamp cover 18 is poor (including low heat dissipation rate and heat dissipation). Non-uniform), therefore, after the liquid crystal display device is operated for a certain time (about 3 〇 minutes), the temperature difference between the first polarizing plate 44 and the second polarizing plate 45 is not uniform, and then the I--the orthogonal direction of the polarization direction Sex. Therefore, a whitening area appears in the display area of the liquid crystal display device close to the lamps 17 (measurement positions ρ7, ρ8, Ρ9), resulting in an unattractive picture. In order to solve the problem of the 94327TW-non-line replacement page 1318712, the conventional method is to extend the heat dissipation portion 182 of the lamp cover 18 to increase the heat dissipation area. However, this method increases the material cost, thereby improving the backlight module 1 The overall cost, and increase the weight of the backlight module. Therefore, it is necessary to provide an innovative and progressive f-light module and a liquid crystal display device including the same to improve the above problems. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a backlight module including: a light guide plate, a lamp reflector, at least one tube, and a tube cover. The light guide plate has a first surface, a second surface and a side surface, and the side surface is a light incident surface. The lamp reflector forms a cavity with a side surface of the light guide plate. The lamp is located in the space (four). The lamp cover is located outside the reflector of the lamp tube for dissipating heat generated by the lamp tube. The lamp tube cover has a concave portion and a heat dissipating region, wherein the concave portion is used to make the A gap is formed between the heat dissipating region and the second surface of the light guide plate, and a plurality of first through holes are formed in the recessed portion, and the plurality of second through holes are opened in the heat dissipating region, wherein the lamp cap cover is in the early area The ratio of the sum of the opening areas of the second through holes is larger as the distance from the tube. Thereby, the heat dissipation rate and the heat dissipation can be achieved, and the backlight module of the present invention is applied to the liquid crystal display device without white staining. [Embodiment] Referring to FIG. 6 and FIG. 7, respectively, a perspective exploded view of a side-lit backlight module according to a first embodiment of the present invention and a partial cross-sectional view after combination are shown. The edge-lit backlight module 2 of the embodiment includes - 22' - 24, an optical film 24, a plastic frame 25, a lamp reflector 94327TW, a non-line replacement page 9 · 1318712 %, two lamps 27 and a lamp cover 28. The backlight module 2 is located below the liquid crystal panel of a liquid crystal display device. The light guide plate 23 has a first surface 231, a second surface 232 and a side surface 233. The side surface 233 is a light incident surface for receiving light from the tubes 27. The first surface 231 is a light exiting surface for transmitting light from the light guide plate 23. The optical film 22 (for example, a brightness enhancement film or a diffusion film) is attached to the first surface 231 of the light guide plate 23 for adjusting the light transmitted from the light guide plate 23. The protective sheet 21 is attached to the optical films 22 to protect the optical films 22. The reflective sheet 24 is attached to the second surface 232 of the light guide plate 23 for reflecting the light emitted by the tubes 27. The s-light seat reflector 26 forms a cavity 29 with the side 233 of the light guide plate 23. The tubes 27 are either cold cathode fluorescent tubes or LED light bars for providing light, and the tubes 27 are located within the cavity 29. The tube cover 28 is located outside of the tube reflector 26 for dissipating the heat generated by the tubes 27. The frame 25 is substantially a rectangular frame for carrying the liquid crystal panel and fixing the light guide plate 23, the reflection sheet 24, the tube reflection cover 26 and the tube cover 28. Referring to Figure 8', there is shown a perspective view of a lamp cover in the edge-lit backlight module of the first embodiment of the present invention. Referring to FIG. 7, the lamp cover 28 has a receiving portion 281, a recess 282, and a heat dissipating region 283. The receiving portion 281 is adapted to receive the bulb reflector 26. The recessed portion 282 is formed by a first bent portion 2821 and a second bent portion 2822. The first bent portion 2821 is connected to the receiving portion 281, and the second bent portion 2822 is connected to the heat dissipation region 283. . The recessed portion 282 is configured to form a gap 30 between the heat dissipating region 283 and the reflective sheet 24, 94327TW_ without a scribe line replacement page -10- 1318712 for air to flow through the plurality of first through holes 3 1 and the second through holes 32. The second bending portion 2822 is opened on the heat dissipation region 283 and is provided with a plurality of devices.
-亥散熱區域283之散熱原理如下。由於在使用狀態時， 該背光m係為直立，且該等第—透孔3丨在該等第二透 子、之下方因此，冷空氣會由該等第一透孔31進入該間 隙3〇接著該冷空氣與該散熱區域283熱交換後形成熱空 氣’該熱空氣則由該等第二透孔32或該間隙聊開該散熱 區域283 ’如此循環’可藉由空氣持續地對流而將該散熱 區域283上之熱帶走，達到散熱之目的。 在本發明中’該燈管蓋28每單位面積中該等第二透孔32 之開孔面積總和所佔之比例越遠離該等燈鲁W越大，且呈 漸進式之變化。如此會有以下二種情況，第—種情況是， 如果每-該等第二透孔32之開孔面積皆相同，則該散熱區 位面積中該等第二透孔32之分佈密度越遠離該The heat dissipation principle of the hai heat dissipation area 283 is as follows. Since the backlight m is upright in the state of use, and the first through holes 3 are below the second through holes, cold air enters the gap through the first through holes 31, and then The cold air is thermally exchanged with the heat dissipating region 283 to form hot air. The hot air is circulated by the second through holes 32 or the gaps to circulate the heat dissipating region 283'. The tropical area on the heat dissipation area 283 is used for heat dissipation. In the present invention, the ratio of the total opening area of the second through holes 32 per unit area of the lamp tube cover 28 is larger as the distance from the lamp W is larger, and changes progressively. There are the following two cases. In the first case, if the opening areas of the second through holes 32 are the same, the distribution density of the second through holes 32 in the heat dissipating area is farther away from the
等燈官27越大’亦即該等第二透孔32之中心點間之間距越 遠離該等燈管27越小。第二種情況是，如果該散熱區域 每單位面積中該等第二透孔32之分佈密度皆相同，亦 即該等第二透孔32之中心點間之間距皆相同，則該等第二 透孔32之開孔面積越遠離該等燈管27越大。由圖8可知本The larger the lamp 27 is, the smaller the distance between the center points of the second through holes 32 is, the further away from the lamps 27. In the second case, if the distribution density of the second through holes 32 is the same per unit area of the heat dissipation area, that is, the distance between the center points of the second through holes 32 is the same, then the second The opening area of the through hole 32 is larger as the distance from the lamps 27 is larger. Figure 8 shows this
實施例所示係為上述之第二種情況，其中該等第二透孔U 之中心點間之間距皆相g (該等第二透孔32之分佈密度皆 相同），然而，該等第二透孔32之開孔面積越遠離該等燈 管27越大。 94327TW_無劃線替換頁 -11 - 1318712 此種漸進式之開孔變化之優點如下。由於越靠近該等燈 管27該散熱區域283之金屬部份所估之比例越高，此時由 於金屬熱傳導之傳熱速率比空氣對流快，因此大部分的熱 會先經由該散熱區域283之金屬部份向上方（即圖4之右方） 傳導出去。另外，在遠離該等燈管27(越上方）之位置，由 於該散熱區域283之該等第二透孔32之開孔面積總和所佔 之比例越來越大，因此，大部分位於該散熱區域283之金 屬部份的熱會被該間隙30内之空氣帶走，且該間隙3〇内之 空氣會形成熱空氣而向上且經由該等第二透孔32或該間隙 30離開該散熱區域283，而形成上述之循環。如此，不僅 散熱速率快，而且可散熱均勻。 本實施例之該侧光式背光模組2可以應用於一液晶顯示 裝置中包括但不限於液晶顯示器、筆記型電腦之螢幕及 液晶電視等。在本實施例中，該側光式背光模組2係位於 該液晶顯示裝置之液晶面板之下方，本實施例所使用之液 晶面板係與圖3之該液晶面板4相同，該液晶面板4包括一 彩色濾光基板41、一薄膜電晶體基板42、一液晶層43、一 第一偏光板44及一第二偏光板45。該彩色濾光基板4丨係位 於該薄膜電晶體基板42上方，且其二者間夾設該液晶層 43。該第一偏光板44係貼附於該彩色濾光基板41上方，該 第二偏光板45係貼附於該薄膜電晶體基板42之下方。該側 光式背光模組2係位於該薄膜電晶體基板42下方。 參考表2a至2d ’分別顯示包含本發明之背光模組之液晶 顯示裝置作動30分鐘後該第一偏光板44及該第二偏光板45 94327TWjfe劃線替換頁 12 Ρί8712 之溫度、溫差及溫差均勻度。表2a係顯示該第一偏光板44 在不同位置之表面溫度，其量測方式與量測位置係與表 相同，例如量測位置？1係位於該第一偏光板44之左上方， 量測位置P3係位於該第一偏光板44之右上方，量測位置p5 係位於該第一偏光板44之中央，量測位置ρ7、ρ8、Μ係最 接近該等燈管27。表2b係顯示該第二偏光板45在不同位置 之溫度，其量測方式與量測位置係與表lb相同，例如量測 位置P12係位於該第二偏光板45之左上方，量測位置ρι〇係 位於該第二偏光板45之右上方，量測位置pi4係位於該第 二偏光板45之中央。表2c係顯示在不同相對位置該第一偏 光板44與該第二偏光板45二者之溫度差，例如…係量測位 置P1及里測位置p 12之溫度差，μ係量測位置p3及量測位 置P10之溫度差。表2d係顯示表2c中不同位置之溫度差與 中央之溫度差（Δ5)間之均勻度。 比較表2a及表la可發現包含本發明之背光模組之液晶顯 示裝置之第一偏光板之溫度在各個量測位置所量得之溫度 皆比習知液晶顯示裝置之第一偏光板之溫度低。比較表几 及表1b可發現包含本發明之背光模組之液晶顯示裝置之第 一偏光板之溫度在各個量測位置所量得之溫度皆比習知液 晶顯示裝置之第二偏光板之溫度低。因此，顯示本發明之 背光模組2之散熱效果良好。 由表2d可知在本發明之背光模組2中，所有位置之溫差 均勻度皆被控制在± 210 %之間’顯示本發明之背光模組2 之散熱十分均勻’因此不會產生白污現象。 94327TW_無釗線替換頁 1318712 參考圖9,顯示本發明第二實施例侧光式背光模組之組 合後之局部剖視示意圖。本實施例之側光式背光模組5與 該第-實施例之側光式背光模組2大致相同，纟中相同元 件賦予相同元件編號。本實施例之側光式背光模組5與該 第一實施例之側光式背光模組2之不同處僅在於，本實施 例之側光式背光模組5中之該燈管蓋28之該凹部282之第一 彎折部2821亦開設有複數個第一透孔31，以增加散熱效 率。可以理解的是，本實施例之侧光式背光模組5中，該 第一彎折部2822上仍有該等第一透孔31，該散熱區域283 上仍有該等第二透孔32。 參考圖10，顯示本發明第三實施例側光式背光模組中之 燈官蓋之立體示意圖。本實施例之側光式背光模組6與該 第二實施例之側光式背光模組5大致相同，其中相同元件 賦予相同元件編號。本實施例之側光式背光模組6與該第 二實施例之側光式背光模組5之不同處如下，在該第二實 把例之側光式背光模組5之該燈管蓋28之該凹部282中，該 第一彎折部2821及該第二彎折部2822間係由一連接區域所 連接，該連接區域大致上與該反射片24呈現面接觸，而使 該凹部282形成類似门字形。然而在本實施例之側光式背 光模組6之該燈管蓋28之該凹部282中，該第一彎折部2821 及該第二彎折部2822係直接連接，而使該凹部282形成類 似Λ字形。亦即該第二彎折部2822與該散熱區域283係位 於同一平面。因此，該凹部282僅利用其頂端與該反射片 24呈現線接觸。 94327TW_無劃線替換頁 -14- 1318712 上述實施例僅為說明本發明之原理及其功效，並非限制 本發明，因此習於此技術之人士對上述實施例進行修改及 變化仍不脫本發明之精神。本發明之權利範圍應如後述之 申請專利範圍所列。 量測位置 P1 P2 P3 量測溫度(。〇 27.60 27.55 27.63 量測位置 P4 P5 P6 量測溫度(°c) 28.05 27.95 27.02 量測位置 P7 P8 P9 量測溫度(。〇 32.98 31.52 31.81 量測位置 P12 P11 P10 量測溫度(。〇 27.90 27.80 27.95 量測位置 P15 P14 P13 量測溫度CC) 27.92 28.07 27.30 量測位置 P18 P17 P16 量測溫度(。〇 33.44 32.41 32.32 • 表la 表lb 位置 Δ1=Ρ1-Ρ12 Δ2-Ρ2-Ρ11 Δ3=Ρ3-Ρ10 溫度差(。〇 -0.30 -0.25 -0.32 位置 Δ4=Ρ4-Ρ15 Δ5=Ρ5-Ρ14 Δ6=Ρ6-Ρ13 溫度差(。〇 0.13 -0.12 -0.28 位置 Δ7=Ρ7-Ρ18 Δ8=Ρ8-Ρ17 Δ9=Ρ9-Ρ16 溫度差(。〇 -0.46 -0.89 -0.51 表lc 位置 (Δ1-Δ5)/ Δ5 (Δ2-Δ5)/ Δ5 (Δ3-Δ5)/ Δ5 溫差均勻度 150% 108% 167% 位置 (Δ4-Δ5)/ Δ5 (Δ5-Δ5)/ Δ5 (Δ6-Δ5)/ Δ5 溫差均勻度 -208% 0% 133% 位置 (Δ7-Δ5)/ Δ5 (Δ8-Δ5)/ Δ5 (Δ9-Δ5)/ Δ5 溫差均勻度 283% 642% 325%The embodiment is the second case described above, wherein the distance between the center points of the second through holes U is the same phase g (the distribution density of the second through holes 32 are the same), however, the first The opening area of the two through holes 32 is larger as the distance from the lamps 27 is larger. 94327TW_Without line replacement page -11 - 1318712 The advantages of this progressive opening change are as follows. Since the proportion of the metal portion of the heat dissipating region 283 is closer to the lamp tube 27, the heat transfer rate of the metal heat conduction is faster than the air convection, so most of the heat will first pass through the heat dissipating region 283. The metal portion is conducted upward (ie, to the right of Figure 4). In addition, at a position away from the lamps 27 (upward), since the ratio of the total opening area of the second through holes 32 of the heat dissipation region 283 is larger and larger, most of the heat is located in the heat dissipation region 283. The heat of the metal portion of the region 283 is carried away by the air in the gap 30, and the air in the gap 3〇 forms hot air and exits the heat dissipation region upward through the second through hole 32 or the gap 30. 283, and form the above cycle. In this way, not only the heat dissipation rate is fast, but also the heat dissipation is uniform. The edge-lit backlight module 2 of the present embodiment can be applied to a liquid crystal display device including, but not limited to, a liquid crystal display, a screen of a notebook computer, a liquid crystal television, and the like. In this embodiment, the edge-lit backlight module 2 is located below the liquid crystal panel of the liquid crystal display device. The liquid crystal panel used in this embodiment is the same as the liquid crystal panel 4 of FIG. 3 , and the liquid crystal panel 4 includes A color filter substrate 41, a thin film transistor substrate 42, a liquid crystal layer 43, a first polarizing plate 44, and a second polarizing plate 45. The color filter substrate 4 is positioned above the thin film transistor substrate 42 with the liquid crystal layer 43 interposed therebetween. The first polarizing plate 44 is attached to the color filter substrate 41, and the second polarizing plate 45 is attached to the lower surface of the thin film transistor substrate 42. The edge-lit backlight module 2 is located below the thin film transistor substrate 42. Referring to Tables 2a to 2d' respectively, the temperature, temperature difference, and temperature difference of the first polarizing plate 44 and the second polarizing plate 45 94327TWjfe are replaced after the liquid crystal display device including the backlight module of the present invention is activated for 30 minutes. degree. Table 2a shows the surface temperature of the first polarizing plate 44 at different positions. The measurement method and the measurement position are the same as the table, for example, the measurement position? 1 is located at the upper left of the first polarizing plate 44, the measuring position P3 is located at the upper right of the first polarizing plate 44, and the measuring position p5 is located at the center of the first polarizing plate 44, and the measuring positions ρ7, ρ8 The tether is closest to the tubes 27. Table 2b shows the temperature of the second polarizing plate 45 at different positions, and the measuring manner and the measuring position are the same as the table lb. For example, the measuring position P12 is located at the upper left of the second polarizing plate 45, and the measuring position is The ρι〇 system is located at the upper right of the second polarizing plate 45, and the measuring position pi4 is located at the center of the second polarizing plate 45. Table 2c shows the temperature difference between the first polarizing plate 44 and the second polarizing plate 45 at different relative positions, for example, the temperature difference between the measuring position P1 and the measured position p 12, and the μ measuring position p3 And measuring the temperature difference of the position P10. Table 2d shows the uniformity between the temperature difference at different positions in Table 2c and the temperature difference (Δ5) in the center. Comparing Table 2a and Table la, it can be found that the temperature of the first polarizing plate of the liquid crystal display device including the backlight module of the present invention is higher than the temperature of the first polarizing plate of the conventional liquid crystal display device at each measuring position. low. Comparing the table and the table 1b, it can be found that the temperature of the first polarizing plate of the liquid crystal display device including the backlight module of the present invention is higher than the temperature of the second polarizing plate of the conventional liquid crystal display device at each measuring position. low. Therefore, the heat dissipation effect of the backlight module 2 of the present invention is shown to be good. It can be seen from Table 2d that in the backlight module 2 of the present invention, the temperature difference uniformity of all the positions is controlled to be between ± 210% 'the heat dissipation of the backlight module 2 of the present invention is very uniform', so that no white stain is generated. . 94327TW_Infinite Line Replacement Page 1318712 Referring to Figure 9, there is shown a partial cross-sectional view of the combination of the edge-lit backlight modules of the second embodiment of the present invention. The edge-lit backlight module 5 of the present embodiment is substantially the same as the edge-lit backlight module 2 of the first embodiment, and the same components are given the same component numbers. The difference between the edge-lit backlight module 5 of the present embodiment and the edge-lit backlight module 2 of the first embodiment is only the lamp cover 28 of the edge-lit backlight module 5 of the present embodiment. The first bent portion 2821 of the recess 282 is also provided with a plurality of first through holes 31 to increase heat dissipation efficiency. It can be understood that, in the edge-lit backlight module 5 of the embodiment, the first through-holes 31 are still present in the first bent portion 2822, and the second through-holes 32 are still present in the heat-dissipating area 283. . Referring to Fig. 10, there is shown a perspective view of a lamp official cover in the edge-lit backlight module of the third embodiment of the present invention. The edge-lit backlight module 6 of the present embodiment is substantially the same as the edge-lit backlight module 5 of the second embodiment, wherein the same components are given the same component numbers. The difference between the edge-lit backlight module 6 of the present embodiment and the edge-lit backlight module 5 of the second embodiment is as follows. The lamp cover of the edge-lit backlight module 5 of the second embodiment is used. In the recess 282 of the second portion 282, the first bent portion 2821 and the second bent portion 2822 are connected by a connecting region, and the connecting portion is substantially in surface contact with the reflective sheet 24, and the concave portion 282 is made. Form a similar gate shape. However, in the recess 282 of the lamp cover 28 of the edge-lit backlight module 6 of the embodiment, the first bent portion 2821 and the second bent portion 2822 are directly connected, and the concave portion 282 is formed. Similar to a glyph. That is, the second bent portion 2822 is in the same plane as the heat dissipation region 283. Therefore, the recess 282 is in line contact with the reflection sheet 24 only by its tip end. 94327TW_Unlined Replacement Page - 14 - 1318712 The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention, and those skilled in the art will be able to modify and change the above embodiments without departing from the invention. The spirit. The scope of the invention should be as set forth in the appended claims. Measurement position P1 P2 P3 Measurement temperature (.〇27.60 27.55 27.63 Measurement position P4 P5 P6 Measurement temperature (°c) 28.05 27.95 27.02 Measurement position P7 P8 P9 Measurement temperature (.〇32.98 31.52 31.81 Measurement position P12 P11 P10 Measurement temperature (.〇27.90 27.80 27.95 Measurement position P15 P14 P13 Measurement temperature CC) 27.92 28.07 27.30 Measurement position P18 P17 P16 Measurement temperature (.〇33.44 32.41 32.32 • Table la Table lb Position Δ1=Ρ1- Ρ12 Δ2-Ρ2-Ρ11 Δ3=Ρ3-Ρ10 Temperature difference (.〇-0.30 -0.25 -0.32 Position Δ4=Ρ4-Ρ15 Δ5=Ρ5-Ρ14 Δ6=Ρ6-Ρ13 Temperature difference (.〇0.13 -0.12 -0.28 Position Δ7 =Ρ7-Ρ18 Δ8=Ρ8-Ρ17 Δ9=Ρ9-Ρ16 Temperature difference (.〇-0.46 -0.89 -0.51 Table lc Position (Δ1-Δ5)/ Δ5 (Δ2-Δ5)/ Δ5 (Δ3-Δ5)/ Δ5 Temperature difference Uniformity 150% 108% 167% Position (Δ4-Δ5) / Δ5 (Δ5-Δ5) / Δ5 (Δ6-Δ5) / Δ5 Temperature difference uniformity - 208% 0% 133% Position (Δ7-Δ5) / Δ5 (Δ8 -Δ5) / Δ5 (Δ9-Δ5) / Δ5 temperature difference uniformity 283% 642% 325%
表Id 94327TW_無劃線替換頁 15- 1318712 量測位置 P1 P2 P3 量測溫度(。。） 26.24 26.08 26.75 量測位置 P4 P5 P6 量測溫度(〇c) 26.96 27.10 27.48 量測位置 P7 P8 P9 量測溫度(。〇 31.17 29.24 30.95 量測位置 P12 P11 P10 量測溫度(。〇 26.52 26.80 27.10 量測位置 P15 P14 P13 量測溫度rc) 27.07 27.58 27.64 量測位置 P18 P17 P16 量測溫度(。〇 31.75 29.89 31.22 表2a 表2b 位置 Δ1=Ρ1-Ρ12 Δ2=Ρ2-Ρ11 Δ3=Ρ3-Ρ10 溫度差(。。） -0.28 -0.71 -0.35 位置 Δ4=Ρ4-Ρ15 Δ5=Ρ5-Ρ14 Δ6=Ρ6-Ρ13 溫度差(V) -0.11 -0.48 -0.16 位置 Δ7=Ρ7-Ρ18 Δ8=Ρ8-Ρ17 Δ9=Ρ9-Ρ16 溫度差(V) -0.58 -0.65 -0.27Table Id 94327TW_Without scribe replacement page 15- 1318712 Measurement position P1 P2 P3 Measurement temperature (..) 26.24 26.08 26.75 Measurement position P4 P5 P6 Measurement temperature (〇c) 26.96 27.10 27.48 Measurement position P7 P8 P9 Measuring temperature (.〇31.17 29.24 30.95 Measuring position P12 P11 P10 Measuring temperature (.〇26.52 26.80 27.10 Measuring position P15 P14 P13 Measuring temperature rc) 27.07 27.58 27.64 Measuring position P18 P17 P16 Measuring temperature (.〇 31.75 29.89 31.22 Table 2a Table 2b Position Δ1=Ρ1-Ρ12 Δ2=Ρ2-Ρ11 Δ3=Ρ3-Ρ10 Temperature difference (...) -0.28 -0.71 -0.35 Position Δ4=Ρ4-Ρ15 Δ5=Ρ5-Ρ14 Δ6=Ρ6- Ρ13 Temperature difference (V) -0.11 -0.48 -0.16 Position Δ7=Ρ7-Ρ18 Δ8=Ρ8-Ρ17 Δ9=Ρ9-Ρ16 Temperature difference (V) -0.58 -0.65 -0.27
表2c 位置 (Δ1-Δ5)/ Δ5 (Δ2-Δ5)/ Δ5 (Δ3-Δ5)/ Δ5 溫差均勻度 -41% 49% -28% 位置 (Δ4-Δ5)/ Δ5 (Δ5-Δ5)/ Δ5 (Δ6-Δ5)/ Δ5 溫差均勻度 -77% 0% -67% 位置 (Δ7-Δ5)/ Δ5 (Δ8-Δ5)/ Δ5 (Δ9-Δ5)/ Δ5 溫差均勻度 20% 34% -44%Table 2c Position (Δ1-Δ5) / Δ5 (Δ2-Δ5) / Δ5 (Δ3-Δ5) / Δ5 Temperature difference uniformity -41% 49% -28% Position (Δ4-Δ5) / Δ5 (Δ5-Δ5) / Δ5 (Δ6-Δ5)/ Δ5 Temperature difference uniformity -77% 0% -67% Position (Δ7-Δ5) / Δ5 (Δ8-Δ5) / Δ5 (Δ9-Δ5) / Δ5 Temperature difference uniformity 20% 34% -44%
表2d 【圖式簡單說明】 圖1顯示習知側光式背光模組之立體分解示意圖； 圖2顯示習知側光式背光模組之組合後之局部剖視示意 圖； 圖3顯不習知液晶顯不裝置之液晶面板之不意圖， 圖4顯示習知液晶面板中第一偏光板之溫度量測位置示 94327TW_無劃線替換頁 -16- (3) 1318712 ▲ 意圖； 圖5顯示習知液晶面板中第二偏光板之溫度量測位置示 意圖； 圖6顯示本發明第一實施例側光式背光模組之立體分解 • 示意圖； • 圖7顯示本發明第一實施例側光式背光模组之組合後之 局部剖視不意圖； | 圖8顯示本發明第一實施例侧光式背光模組中之燈管蓋 之立體示意圖； 圖9顯示本發明第二實施例側光式背光模組之組合後之 局部剖視示意圖； 圖10顯示本發明第三實施例側光式背光模組中之燈管蓋 之立體示意圖； 【主要元件符號說明】 1 習知側光式背光模組 2 本發明第一實施例之側光式背光模組 4 習知液晶面板 5 本發明第二實施例之側光式背光模組 6 本發明第三實施例之側光式背光模組 11 保護片 12 光學膜 13 導光板 14 反射片 15 膠框Table 2d is a schematic exploded perspective view of a conventional side-lit backlight module; Figure 2 is a partial cross-sectional view showing a combination of a conventional edge-lit backlight module; The liquid crystal panel of the liquid crystal display device is not intended, and FIG. 4 shows the temperature measurement position of the first polarizing plate in the conventional liquid crystal panel. 94327TW_No underline replacement page-16-(3) 1318712 ▲ Intention; FIG. FIG. 6 is a perspective exploded view of the edge-lit backlight module of the first embodiment of the present invention; FIG. 7 is a perspective view of the first embodiment of the present invention. FIG. 8 is a perspective view showing a lamp cover in a side-light type backlight module according to a first embodiment of the present invention; FIG. 9 is a side view backlight showing a second embodiment of the present invention; FIG. 10 is a perspective view showing a lamp cover in a side-light type backlight module according to a third embodiment of the present invention; [Description of Main Components] 1 Conventional Side Light Type Backlight Module 2 invention The edge light type backlight module 4 of the embodiment is a liquid crystal backlight panel. The edge light type backlight module 6 of the second embodiment of the present invention is the edge light type backlight module 11 of the third embodiment of the present invention. Light board 14 reflective sheet 15 plastic frame
94327TW—無劃線替換頁 -17- 16 1318712 17 18 19 21 22 23 24 25 26 27 28 29 30 31 32 41 42 43 44 45 131 132 133 燈管反射罩 燈管 燈管蓋 空腔 保護片 光學膜 導光板 反射片 膠框 燈管反射罩 燈管 燈管蓋 空腔 間隙 第一透孔 第二透孔 彩色濾光基板 薄膜電晶體基板 液晶層 第一偏光板 第二偏光板 導光板之第一表面 導光板之第二表面 導光板之側面 94327TW_無劃線替換頁 -18- 1318712 181 承接部 182 散熱部 231 導光板之第一表面 232 導光板之第二表面 233 導光板之側面 281 承接部 282 凹部 283 散熱區域94327TW—without line replacement page-17- 16 1318712 17 18 19 21 22 23 24 25 26 27 28 29 30 31 32 41 42 43 44 45 131 132 133 Lamp reflector lamp tube cover cavity cavity protection sheet optical film Light guide plate reflective sheet plastic frame lamp reflector cover lamp tube cover cavity gap first through hole second through hole color filter substrate film transistor substrate liquid crystal layer first polarizing plate second polarizing plate light guide plate first surface Side surface of the second surface light guide plate of the light guide plate 94327TW_No underline replacement page -18- 1318712 181 Receiving portion 182 Heat dissipating portion 231 First surface of the light guide plate 232 Second surface of the light guide plate 231 Side surface 281 of the light guide plate Receiving portion 282 Concave portion 283 heat dissipation area
2821 第一彎折部 2822 第二彎折部2821 First bend 2822 Second bend
94327TW_無劃線替換頁 19-94327TW_Without line replacement page 19-