201011411 九 '發明說明： 【發明所屬之技術領域】 本發明係關於一種顯示裝置及其背光模組，特別關於 一種液晶顯示裝置及其直下式背光模組。 【先前技術】 〇BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and a backlight module thereof, and more particularly to a liquid crystal display device and a direct-lit backlight module thereof. [Prior Art] 〇
液晶顯示裝置之顯示品質包括反應時間（response time)、色彩飽足度、對比度、亮度及背光源的均齊度等。 其中，背光模組的發光均齊度直接影響視覺感受，因此提 升背光源的均齊度，避免產生暗區，乃為設計的重點。 睛參照圖1A與圖1B所示，一種習知之液晶顯示裝置 1包含一液晶顯示面板U、一背光模組12以及一框體13， 液晶顯示面板11係容置於背光模組12與框體13之間， 其中，液晶顯示面板11係具有一顯示區111。背光模組12 係為一直下式背光模組’並具有一燈箱121、複數個燈管 122以及一反射板123。如圖1B所示，燈箱121具有一側 板1211及一底板1212 ;燈管122係為冷陰極螢光燈管 ( Cold Cathode Fluorescent Lamp，CCFL)，並設置於燈箱 121内；反射板123係設置於燈箱121之側板1211及底板 m2，以反射燈管122所發出之光線。 一 請參照圖2所示，在顯示區111中，由於燈管122不 同位置的發光效率並非呈現均勻分佈，垵故。上 > s 122中央的亮 度尚於二個端部1221的亮度，造成習知 t ,、匕如 义罝下式月光模 組的均齊度約只能達到75%至85%、也化最暗處的相對 201011411 亮度僅為最亮處的相對亮度的75%至85%，如此難以滿足 發光均齊度要求較高的顯示器的應用需求，例如是發光均 齊度要求在90%以上的規格需求的醫療用顯示器等。 為改善背光源的均齊度，習知技術藉由燈箱121或者 反射板123之側壁部與燈管122的二個端部1221之間相 對位置及角度最佳化設計，使光線盡量擴散到燈箱121的 兩内側。惟此種方式僅能略微改善整體之均齊度，對於液 晶顯示裝置1之顯示品質仍然無法有效提升。 ❹ 因此，如何提供一種液晶顯示裝置及其直下式背光模 組，提高背光源的均齊度，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液晶顯示 裝置及其直下式背光模組，藉由辅助光源之設置以提高背 光源的均齊度，避免產生暗區，符合更高的光學規格。 為達上述目的，依據本發明之一種直下式背光模組包 ® 含一燈箱、複數個燈管以及至少一輔助光源。該等燈管係 設置於燈箱内，輔助光源係鄰近於該等燈管之端部。 為達上述目的，依據本發明之一種液晶顯示裝置包含 一液晶顯示面板以及一直下式背光模組。液晶顯示面板係 具有一顯示區；直下式背光模組係與該液晶顯示面板對應 設置，包含一燈箱、複數個燈管及至少一辅助光源，直下 式背光模組並具有一對應於談顯示區的一顯示區域。該等 燈管設置於燈箱内，辅助光源設置於顯示區域之外，並鄰 201011411 近於該等燈管之端部。 承上所述，因依據本發明之一種液晶顯示裝置及其直 下式背光模組係藉由將輔助光源鄰設於燈管之端部，並以 電壓或電流調整辅助光源的發光強度，提高背光源的均齊 度。與習知技術相較，本發明之辅助光源能夠補償燈管發 光效率非均勻分佈的缺點，提高鄰近於燈管之端部的發光 亮度，使液晶顯示裝置鄰近顯示區邊緣的亮度得到補償， 進而提高液晶顯示裝置之顯示品質，避免產生暗區，符合 © 更南的光學規格。 【實施方式】 以下將參照相關圖式，說明依本發明較佳實施例之一 種液晶顯示裝置及其直下式背光模組，其中相同的元件將 以相同的參照符號加以說明。 請參照圖3所示，本發明較佳實施例之一種液晶顯示 裝置2包含一液晶顯示面板21、一直下式背光模組22以 ® 及一框體23。液晶顯示面板21係設置於直下式背光模組 22與框體23之間，並具有一顯示區（Active Area，AA) 211，其在直下式背光模組22的投影即定義出一顯示區域 21Γ。 直下式背光模組22係包含一燈箱221、複數個燈管 222及至少一輔助光源223，並具有一對應於液晶顯示面 板的顯示區域21Γ。於本實施例中，係以直下式背光模組 22具有輔助光源223為例說明，非用以限制本發明。燈箱 201011411 221係具有—遮光部2211，該等燈管222係設置於燈箱221 内’並排列卡固於燈管固定部（圖未顯示）。於本實施例 中’該等燈管222係選自冷陰極螢光燈管（CCFL)、熱陰 極營光燈管（Hot Cathode Fluorescent Lamp，HCFL)及外 口P 電極榮光燈官（External Electrode Fluorescent Lamp， EEFL· )所構成的群組。 ❹ 輔助光源223係設置於顯示區域211，之外，並鄰近設 置於^等燈管222之端部2221。於本實施例中，辅助光源 223設置於顯示區域211，與遮光部2211之間，且至少在每 二燈管222之間設置輔助光源223。 請參照圖4所示，另-種液晶顯示裳置2，之輔助光源 223^設於遮光部2211的表面上；然而，輔助光源挪 可依據貫際需求而改變設置位置，间 樣相婦燈管發光 效率非均^佈的目的，且可配合f路佈局使直 模組更具設計彈性。於本實施例中，纟 九 但不限於一發光二極體（LED) 你例如 . X 有機發光二極體 (〇LED)，並可藉由電流或電壓調整輔助光源奶 強度。由於發光二極體（LED)為^性點光源，將 設於燈f 222之端部2221，能夠提高鄰近於燈管2 ^ 部2221的發光亮度，使液晶顯示裝 邊緣的亮度得到補償’提高背光源的均齊^近顯不區211 區’符合更高的光學規格’而可用於例如二生暗 請參照圖5Α至圖5C所示，經實驗驗目對二 置關係可得知：將燈管222的發光闽 丁儿度/、位. 、如圖5Α所示）與辅 201011411 助光源223的發光（如圖5B所示）疊加，本發明之液晶 顯示裝置2及直下式背光模組22於顯示區211的背光均 齊度有效提高至90%以上（如圖5C所示），進而有效提高 直下式背光模組之整體發光均齊度及液晶顯示裝置之顯 _ 不品質。 綜上所述，因依據本發明之一種液晶顯示裝置及其直 下式背光模組係藉由將辅助光源鄰設於燈管之端部，並以 電壓或電流調整輔助光源的發光強度，提高背光源的均齊 ❹ 度。與習知技術相較，本發明之辅助光源能夠補償燈管發 光效率非均勻分佈的缺點，提高鄰近於燈管之端部的發光 亮度，使液晶顯示裝置鄰近顯示區邊緣的亮度得到補償， 進而提高液晶顯示裝置之顯示品質，避免產生暗區，符合 更高的光學規格。 以上所述僅為舉例性，而非為限制性者。任何未脫離 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。 〇 【圖式簡單說明】 圖1A與圖1B為一種習知之液晶顧示裝置及其背光模 組之示意圖； 圖2為習知燈管發光之相對亮度與位置之關係圖； 圖3為依據本發明較佳實施例之一種液晶顯示裝置及 其直下式背光模組之示意圖； 圖4為依據本發明較佳實施例之另一種液晶顯示裝置 201011411 及其直下式背光模組之示意圖； 圖5A為燈管發光之相對亮度與位置之關係圖； 圖5B為依據本發明較佳實施例之輔助光源發光之相 對亮度與位置之關係圖；以及 .圖5C為圖5A與圖5B之疊加後相對亮度與位置之關 係圖。 【主要元件符號說明】 ❹ 1、2、2’ ：液晶顯示裝置 II、 21 :液晶顯示面板 III、 211 :顯示區 12 :背光模組 121、 221 :燈箱 1211 :側板 1212 .底板 122、 222 :燈管 ® 123 :反射板 .13、23 :框體. 21Γ :顯示區域 22 :直下式背光模組 2211 :遮光部 2221 :端部 223、223':辅助光源The display quality of the liquid crystal display device includes response time, color satiety, contrast, brightness, and uniformity of the backlight. Among them, the uniformity of illumination of the backlight module directly affects the visual experience, so improving the uniformity of the backlight and avoiding dark areas is the focus of the design. Referring to FIG. 1A and FIG. 1B, a conventional liquid crystal display device 1 includes a liquid crystal display panel U, a backlight module 12, and a frame 13. The liquid crystal display panel 11 is housed in the backlight module 12 and the frame. Between 13 and 13, the liquid crystal display panel 11 has a display area 111. The backlight module 12 is a direct-type backlight module ′ and has a light box 121, a plurality of tubes 122 and a reflector 123. As shown in FIG. 1B, the light box 121 has a side plate 1211 and a bottom plate 1212. The lamp tube 122 is a Cold Cathode Fluorescent Lamp (CCFL) and is disposed in the light box 121. The reflector 123 is disposed on the light box 121. The side plate 1211 and the bottom plate m2 of the light box 121 reflect the light emitted by the tube 122. Referring to Fig. 2, in the display area 111, the luminous efficiency at different positions of the lamps 122 is not uniformly distributed. The brightness of the center of the upper > s 122 is still at the brightness of the two ends 1221, resulting in the conventional t, and the uniformity of the moonlight module can only reach 75% to 85%, and the most In the dark, the relative brightness of 201011411 is only 75% to 85% of the relative brightness of the brightest part. It is difficult to meet the application requirements of displays with high uniformity of illumination uniformity, for example, the specification that the uniformity of illumination needs to be above 90%. Demand for medical displays, etc. In order to improve the uniformity of the backlight, the prior art optimizes the relative position and angle between the side wall portion of the light box 121 or the reflector 123 and the two end portions 1221 of the bulb 122, so that the light is diffused as far as possible to the light box. The two inner sides of 121. However, this method can only slightly improve the overall uniformity, and the display quality of the liquid crystal display device 1 cannot be effectively improved. ❹ Therefore, how to provide a liquid crystal display device and its direct type backlight module to improve the uniformity of the backlight has become one of the important topics. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a liquid crystal display device and a direct-lit backlight module thereof, which are provided with an auxiliary light source to improve the uniformity of the backlight and avoid dark areas. Optical specifications. To achieve the above object, a direct type backlight module package according to the present invention includes a light box, a plurality of tubes, and at least one auxiliary light source. The lamps are disposed in the light box, and the auxiliary light sources are adjacent to the ends of the tubes. In order to achieve the above object, a liquid crystal display device according to the present invention comprises a liquid crystal display panel and a direct-lit backlight module. The liquid crystal display panel has a display area; the direct type backlight module is disposed corresponding to the liquid crystal display panel, and comprises a light box, a plurality of light tubes and at least one auxiliary light source, and the direct type backlight module has a corresponding display area. a display area. The lamps are disposed in the light box, and the auxiliary light source is disposed outside the display area and adjacent to the end of the tubes of 201011411. According to the above, a liquid crystal display device and a direct-lit backlight module thereof according to the present invention improve the backlight by adjusting the auxiliary light source adjacent to the end of the lamp and adjusting the luminous intensity of the auxiliary light source by voltage or current. The uniformity of the source. Compared with the prior art, the auxiliary light source of the present invention can compensate for the non-uniform distribution of the luminous efficiency of the lamp tube, improve the brightness of the light adjacent to the end of the lamp tube, and compensate the brightness of the liquid crystal display device adjacent to the edge of the display area, and further Improve the display quality of the liquid crystal display device, avoiding dark areas, and conform to the optical specifications of ©. [Embodiment] Hereinafter, a liquid crystal display device and a direct-lit backlight module according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein like elements will be described with the same reference numerals. Referring to FIG. 3, a liquid crystal display device 2 according to a preferred embodiment of the present invention includes a liquid crystal display panel 21, a direct-type backlight module 22, and a frame 23. The liquid crystal display panel 21 is disposed between the direct-type backlight module 22 and the frame 23, and has an active area (AA) 211. The projection of the direct-lit backlight module 22 defines a display area 21Γ. . The direct type backlight module 22 includes a light box 221, a plurality of tubes 222, and at least one auxiliary light source 223, and has a display area 21A corresponding to the liquid crystal display panel. In the present embodiment, the direct-type backlight module 22 has an auxiliary light source 223 as an example, and is not intended to limit the present invention. The light box 201011411 221 has a light blocking portion 2211 which is disposed in the light box 221 and is arranged to be fixed to the lamp fixing portion (not shown). In the present embodiment, the lamps 222 are selected from the group consisting of a cold cathode fluorescent lamp (CCFL), a hot cathode fluorescent lamp (HCFL), and an external electrode P electrode (External Electrode Fluorescent). A group of Lamp, EEFL·).辅助 The auxiliary light source 223 is disposed outside the display area 211 and adjacent to the end portion 2221 of the lamp tube 222. In the present embodiment, the auxiliary light source 223 is disposed between the display area 211 and the light shielding portion 2211, and at least between each of the two lamps 222 is provided with an auxiliary light source 223. Referring to FIG. 4, another type of liquid crystal display skirt 2 is provided, and the auxiliary light source 223 is disposed on the surface of the light shielding portion 2211; however, the auxiliary light source can be changed according to the continuous demand, and the sample light is separated. The purpose of the tube luminous efficiency is non-uniform, and the straight circuit module can be more flexible in design with the f-way layout. In the present embodiment, the ninth, but not limited to, a light-emitting diode (LED), for example, an X organic light-emitting diode (〇LED), and the intensity of the auxiliary light source can be adjusted by current or voltage. Since the light-emitting diode (LED) is a point light source, it will be disposed at the end portion 2221 of the lamp f 222, which can improve the brightness of the light adjacent to the 2 2 portion of the lamp tube 2, and compensate the brightness of the edge of the liquid crystal display device. The uniformity of the backlight is close to the 211 area 'conforming to higher optical specifications' and can be used, for example, for the second dark. Please refer to Figure 5Α to Figure 5C. The light-emitting diode 222 is superimposed with the light of the auxiliary light source 223 (shown in FIG. 5B), and the liquid crystal display device 2 and the direct-type backlight module of the present invention are superimposed. The backlight uniformity of the display area 211 is effectively increased to 90% or more (as shown in FIG. 5C), thereby effectively improving the overall illumination uniformity of the direct type backlight module and the display quality of the liquid crystal display device. In summary, the liquid crystal display device and the direct-lit backlight module thereof according to the present invention improve the backlight by adjusting the auxiliary light source adjacent to the end of the lamp and adjusting the luminous intensity of the auxiliary light source by voltage or current. The uniformity of the source. Compared with the prior art, the auxiliary light source of the present invention can compensate for the non-uniform distribution of the luminous efficiency of the lamp tube, improve the brightness of the light adjacent to the end of the lamp tube, and compensate the brightness of the liquid crystal display device adjacent to the edge of the display area, and further Improve the display quality of liquid crystal display devices, avoid dark areas, and meet higher optical specifications. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to 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. 1A and FIG. 1B are schematic diagrams of a conventional liquid crystal display device and a backlight module thereof; FIG. 2 is a diagram showing the relationship between relative brightness and position of a conventional lamp; FIG. FIG. 4 is a schematic diagram of another liquid crystal display device 201011411 and a direct type backlight module thereof according to a preferred embodiment of the present invention; FIG. 5A is a schematic view of a liquid crystal display device and a direct type backlight module thereof according to a preferred embodiment of the present invention; FIG. 5B is a diagram showing the relationship between the relative brightness and the position of the illumination of the auxiliary light source according to the preferred embodiment of the present invention; and FIG. 5C is the relative brightness of the superimposed layers of FIG. 5A and FIG. 5B. Diagram of location. [Description of main component symbols] ❹ 1, 2, 2': liquid crystal display device II, 21: liquid crystal display panel III, 211: display area 12: backlight module 121, 221: light box 1211: side panel 1212. bottom plate 122, 222: Lamp® 123: Reflector. 13, 23: Frame. 21Γ: Display area 22: Direct type backlight module 2211: Shading unit 2221: End part 223, 223': Auxiliary light source