201007281 --------UZ1TW 24609twf.doc/n ^ 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種背光模組及顯示裝置，且特別是 有關於一種出光均齊度良好的背光模組以及使用此背光模 組作為顯示光源的液晶顯示裳置。 【先前技術】 ❿ ▲液晶顯示器之夜晶顯示面板本身不具有發光的功 忐，故必須藉由外界光源，例如是背光模組，來提供液晶 顯示面板所需之面光源，進而達到顯示晝面的功能。因此， 背光模組的出光品質與液晶顯示器的顯示品質息息相關。 一般來說，背光模組中常用冷陰極螢光燈管作為發光 光源，所以冷陰極螢光燈管的發光品質可說是影響背光模 組所提供之面光源品質的重要關鍵。冷陰極螢光燈管的兩 端分別設置有高壓電極端以及低壓電極端。冷陰極螢光燈 管在工作時，電流自高壓電極端流動至低壓電極端的過程 :會逐漸漏失，將導致冷陰極螢光燈管的發光輝度在高壓 電極端相對較亮而往低壓電極端的方向相對變暗。尤其是 在冷陰極螢光燈管開啟一段時間後，漏電流現象所造成的 影響會逐漸顯著。 此外，製作冷陰極螢光燈管時，藉由虹吸原理形成於 燈管内部的螢光層往往無法均勻分布於燈管中。通常燈管 中央的螢光層會較厚，而在燈管兩端的螢光層較薄。因此， 冷陰極螢光燈管在工作時，冷陰極螢光燈管的兩端往往會 2〇1〇〇7281_ 24609twf.doc/n 呈現與中央相比較低的輝度。綜合以上因素，冷陰極榮光 燈管接^低壓電極端的區域，其輝度相對低於其他區域。 換吕之’冷陰極螢光燈管的發光輝度是不均勻的，所 以以冷陰極螢光燈管作為光源時，會使得背光模組之出光 均齊度(illuminance uniformity)不甚理想。為了提高背光模 、、且之出光均齊度’可使用發光輝度較均勻的高品質冷陰極 ，光燈官或是配置適當的光學膜片以進行補償，甚至可以 φ 藉由控制電路的調整以使背光模組有較佳的出光均齊度。 然而，使用發光均勻的冷陰極螢光燈管及配置光學膜 片皆需耗費較高的成本，而控制電路的調整又需要較複雜 t技術。因此，要如何在不增加成本以及技術複雜度的前 提下，提高背光模組的出光均齊度是背光模組之製造與設 計的一項重點。 、 【發明内容】 粵本發明提供一種背光模組，以在成本較低以及製作步 驟簡易之前提下，提升背光模組之出光均齊度。 本發明另提供一種液晶顯示裝置，其以出光均齊度良 好的背光模組作為顯示光源，因此具有良好的顯示效果。 本發明提出一種背光模組，其包括燈箱以及至少一燈 管。燈箱具有一圖案化反射結構以定義出具有不同反射率 之一第一區及一第二區。燈管配置於燈箱中。燈管具有一 向壓電極端及一低壓電極端’而第二區對應高壓電極端處 設置’而第一區對應低壓電極端處設置。第一區的反射率 6 201007281 " —JZ1TW 24609twf.doc/n 冋於弟^一區的反射率。 本發明另提出-種液晶顯示裝置，其包括背光模組以 及液晶顯示面板。液晶顯示面板配置於背光模組上方。此 外，月光模組包括燈箱以及至少一燈管。燈箱具有一圖案 化反射結構以定義出具有不同反射率的一第一區及一第二 區。燈官配置於燈箱中。$外，燈管具有一高壓電極端及 一低壓電極端，而第二區對應高壓電極端處設置，而第一 ❹ 區對應低壓電極端處設置。第一區的反射率高於第二區的 反射率。 在本發明之一實施例中，上述之燈箱包括一箱體，箱 體具有一底壁及多個侧壁，而圖案化反射結構位於箱體的 底壁及側壁至少其中之一上，以定義出第一區及第二區。 在本發明之一實施例中，上述之圖案化反射結構例如 為至少一圖案化反射片，其中各圖案化反射片具有不同的 反射率。各圖案化反射片的部份互相重疊，且暴露出來的 圖案化反射片以及燈箱的部份區域定義出第一區及第二 參 區。背光模組更包括一黏著層’其配置於圖案化反射片與 箱體之間。舉例而言，黏著層包括雙面膠、熱固化膠或光 固化膠。 在本發明之一實施例中，上述之圖案化反射結構為至 ’圖案化反射薄膜’以定義出不同反射率的反射區。此 外’各圖案化反射薄膜具有不同之反射率。 在本發明之一實施例_，上述之圖案化反射結構為一 白色反射殼體，配置於箱體内，且箱體與白色反射殼體的 7 201007281 --------JZ1TW 24609twf. doc/n 反射率不同。此外，白色反射殼體具有至少—開口，而開 口暴露出部分箱體，以定義出第一區及第二區。 在本發明之一實施例中，上述之燈箱更具有一第三 區，此第三區位於第-區及第二區之間，且 率低於第二區的反射率。 在本發明之-實施例中，上述之背光模組更包括一光 學膜片組，配置於燈箱上。實務上，光學膜片組包括一擴 φ 散片、一增亮片、一增亮片或其組合。 ，本發明之为光模組中，圖案化反射結構定義出具有不 同光反射率的反射區。將光源發光輝度較弱的區域對應配 置光反射率較高的圖案化反射結構，而光源發光輝度較強 的區域則對應配置光反射率較低的圖案化反射結構 。如此 一來，本發明之背光模組可以具有良好的出光均齊度。同 時丄本發明之圖案化反射結構是利用貼附反射片、在燈箱 的箱體形成開口或是塗佈反射膜等簡便的製程而完成的， 因此本發明更有製程簡易且製作成本低廉的特點。 為讓本發明之上述和其他目的、特徵和優點能更明顯 易懂’下文特舉較佳實施例’並配合所附圖式，作詳細說 明如下。 【實施方式】 為了使背光模組的出光均齊度能夠提高，本發明在此 提出利用不同光反射率的反射區分別對背光模組中不同輝 度區域進行輝度補償。因此，背光模組的出光均齊度不需 201007281 a w/u^jojjOZITW 24609twf.doc/n 藉由昂貴的光學膜或是高品質燈管，甚至電路的調整，就 可獲得補償。以下將提出本發明之背光模組的實施範例以 進行說明，然而本發明所屬技術領域中具有通常知識者當 知本發明並不僅將範圍限定於此實施例。 圖1為本發明一實施例之背光模組的示意圖。請參照 圖1 ’背光模組100包括燈箱110、至少一光源120以及多 個反射層130。燈箱110具有一出光口 112以及相對於出 Φ 光口 112之底部114。光源120配置於燈箱110中。另外， 多個反射層130配置於燈箱11〇之底壁114，反射層13〇 適於將光源120所發出之光線反射至出光口 ι12。 貫際上，因為光源120的發光輝度不易達到完全均勻 的程度，當背光模組1〇〇點亮時，光源12〇在燈箱11〇内 發出的輝度並不一致。因此，本實施例於燈箱11〇内定義 出多個輝度區P，其中光源12〇發出輝度相對較亮的區域 與光源120發出輝度相對較暗的區域可分別被定義為不同 的輝度區P。換言之，定義於燈箱110⑽多個輝度區P 例如疋根據配置於燈箱11〇内的光源12〇之發光輝度而作 劃分，且對應各輝度區P之反射層130具有不同之=反射 在本實施例中，光源120例如是由實質上相互平行之 多個冷陰極螢光燈管所組成(如圖丨所示）。每—A吟極 光燈管具有-高壓電極端122及—低壓電極端124丫同時， 圖1中繪示之各光源120的高壓電極端122皆配置於同一 側’而低壓電極端124皆配置於相對的另—側。由先前技 9 201007281 ----OZ1TW 24609twf.doc/n Ϊ丁：次t陰極勞光燈官在工作時’電流自高壓電極端122 ^至低壓電極端124的過程中會逐漸漏失，使得光源12〇 ，應低壓電極端124之輝度相對較低。在此，可將燈箱ιι〇 中對應光源120發光輝度較高之區域定義為第一輝度區 P1。另外，燈箱110中對應光源120發光輝度較低之區域， 也就是對應於低壓電極端124的區域，則可定義為第二輝 度區P2。 ® ,為使背光模組100的出光均齊度達到一定的要求，必 須使第-輝度區P1與第二輝度區P2能夠呈現大致相同的 輝度。因此，本實施例在燈箱110的底部144配置不同光 反射率的反射層130’其中光反射率較小的第一反射層132 對應配置於第一輝度區内，而光反射率較大的第二反 射層134對應配置於第二輝度區P2内。實際上，不同反 射率的這些反射層130在此也可定義為一種圖案化反射結 構(未標示），以分別在背光模組1〇〇中的不同區域提供不 魯 同程度的反射作用。換言之，圖案化反射結構(未標示)設 置於月光模組100中是用以定義出多個不同反射率的反射 區（未標示）。因此，本發明並不限定圖案化反射結構(未標 示)是以何種形式配置於背光模組100中。 當背光模組100被點亮時，第一輝度區P1所呈現的 輝度包括光源120在第一輝度區P1發出的光線以及被第 —反射層132反射出來之光線的輝度總和。同樣地，第二 輝度區P2所呈現的輝度為光源120在第二輝度區P2發出 的光線以及被第二反射層134反射出來之光線的輝度總 201007281 --------JZ1TW 24609twf.doc/n 和。雖然，光源120本身對應第二輝度區P2所發出的輝 度相對較暗，但第二反射層134具有較大的光反射率，而 使在第二輝度區P2中光源120所發出的光線可以更有效 率地被反射至出光口 112。相對而言，因為光源對應第一 輝度區pi的輝度較亮，因此可使用光反射率較反射層134 之光反射率低的反射層132。201007281 --------UZ1TW 24609twf.doc/n ^ IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module and a display device, and more particularly to a uniform illumination A good backlight module and a liquid crystal display using the backlight module as a display light source. [Prior Art] ▲ ▲ The night crystal display panel of the liquid crystal display itself does not have the function of illuminating, so the external light source, such as a backlight module, must be provided to provide the surface light source required for the liquid crystal display panel, thereby achieving the display surface. The function. Therefore, the light output quality of the backlight module is closely related to the display quality of the liquid crystal display. Generally speaking, a cold cathode fluorescent tube is commonly used as a light source in a backlight module, so the light quality of a cold cathode fluorescent tube can be said to be an important factor affecting the quality of the surface light source provided by the backlight module. The two ends of the cold cathode fluorescent lamp are respectively provided with a high voltage electrode end and a low voltage electrode end. When the cold cathode fluorescent lamp is in operation, the current flows from the high voltage electrode end to the low voltage electrode end: the gradual loss will cause the luminescence brightness of the cold cathode fluorescent lamp to be relatively bright at the high voltage electrode end. The direction of the low voltage electrode end is relatively dark. Especially after the cold cathode fluorescent lamp is turned on for a while, the effect of leakage current will gradually become significant. Further, when a cold cathode fluorescent lamp is fabricated, the phosphor layer formed inside the tube by the siphon principle is often not uniformly distributed in the tube. Usually the phosphor layer in the center of the tube will be thicker and the phosphor layer on both ends of the tube will be thinner. Therefore, when the cold cathode fluorescent lamp is in operation, the ends of the cold cathode fluorescent lamp tend to be 2〇1〇〇7281_24609twf.doc/n exhibiting a lower luminance than the center. Based on the above factors, the cold cathode glory lamp is connected to the low voltage electrode end, and its luminance is relatively lower than other regions. The luminescence brightness of the cold cathode fluorescent lamp is not uniform. Therefore, when the cold cathode fluorescent lamp is used as the light source, the illuminance uniformity of the backlight module is not ideal. In order to improve the uniformity of the backlight mode and the light uniformity, a high-quality cold cathode with a relatively uniform luminance can be used. The light fixture can be equipped with an appropriate optical film to compensate, and even φ can be adjusted by the control circuit. The backlight module has better uniformity of light output. However, the use of a uniform cathode fluorescent cathode fluorescent lamp and the arrangement of an optical film requires a relatively high cost, and the adjustment of the control circuit requires a more complicated t technique. Therefore, how to improve the uniformity of light output of the backlight module without increasing the cost and technical complexity is a key point in the manufacture and design of the backlight module. SUMMARY OF THE INVENTION The present invention provides a backlight module that is designed to improve the uniformity of light output of the backlight module before the cost is low and the manufacturing steps are simple. The present invention further provides a liquid crystal display device which uses a backlight module with good light uniformity as a display light source, and thus has a good display effect. The invention provides a backlight module comprising a light box and at least one light tube. The light box has a patterned reflective structure to define a first zone and a second zone having different reflectivities. The lamp is arranged in the light box. The lamp tube has a first piezoelectric terminal and a low voltage electrode terminal ' while the second region corresponds to the high voltage electrode terminal' and the first region corresponds to the low voltage electrode terminal. The reflectivity of the first zone 6 201007281 " —JZ1TW 24609twf.doc/n The reflectivity of the zone. The present invention further provides a liquid crystal display device including a backlight module and a liquid crystal display panel. The liquid crystal display panel is disposed above the backlight module. In addition, the moonlight module includes a light box and at least one light tube. The light box has a patterned reflective structure to define a first zone and a second zone having different reflectivities. The lamp officer is placed in the light box. Outside, the lamp has a high voltage electrode end and a low voltage electrode end, and the second zone is disposed corresponding to the high voltage electrode end, and the first ❹ zone is disposed corresponding to the low voltage electrode end. The reflectance of the first zone is higher than the reflectivity of the second zone. In an embodiment of the invention, the light box comprises a box body, the box body has a bottom wall and a plurality of side walls, and the patterned reflective structure is located on at least one of the bottom wall and the side wall of the box body to define Out of the first zone and the second zone. In one embodiment of the invention, the patterned reflective structure is, for example, at least one patterned reflective sheet, wherein each patterned reflective sheet has a different reflectivity. Portions of each of the patterned reflective sheets overlap each other, and the exposed patterned reflective sheet and a portion of the light box define a first region and a second reference region. The backlight module further includes an adhesive layer disposed between the patterned reflective sheet and the case. For example, the adhesive layer includes a double-sided tape, a heat-curable adhesive or a light-curing adhesive. In one embodiment of the invention, the patterned reflective structure described above is a patterned reflective film to define reflective regions of different reflectivity. Further, each of the patterned reflective films has a different reflectance. In an embodiment of the invention, the patterned reflective structure is a white reflective housing disposed in the housing, and the housing and the white reflective housing are 7 201007281 -------- JZ1TW 24609twf. Doc/n has different reflectances. In addition, the white reflective housing has at least an opening, and the opening exposes a portion of the housing to define a first zone and a second zone. In an embodiment of the invention, the light box further has a third zone, the third zone being located between the first zone and the second zone, and the rate is lower than the reflectivity of the second zone. In an embodiment of the invention, the backlight module further includes an optical film set disposed on the light box. In practice, the optical film set includes a φ diffuser, a brightener, a brightener, or a combination thereof. In the optical module of the present invention, the patterned reflective structure defines a reflective region having different light reflectivities. A region in which the light source luminance is weak is arranged to correspond to a patterned reflection structure having a high light reflectance, and a region having a strong light source luminance corresponds to a patterned reflection structure having a low light reflectance. In this way, the backlight module of the present invention can have good uniformity of light output. At the same time, the patterned reflective structure of the present invention is completed by a simple process such as attaching a reflective sheet, forming an opening in a box of a light box, or coating a reflective film. Therefore, the present invention has the advantages of simple process and low production cost. . The above and other objects, features and advantages of the present invention will become more apparent < [Embodiment] In order to improve the uniformity of the light output of the backlight module, the present invention proposes to perform luminance compensation for different luminance regions in the backlight module by using reflection regions of different light reflectances. Therefore, the uniformity of the light output of the backlight module does not need 201007281 a w/u^jojjOZITW 24609twf.doc/n Compensation can be obtained by expensive optical film or high quality lamp, even circuit adjustment. The embodiments of the backlight module of the present invention will be described below, but the present invention is not limited to the embodiments. FIG. 1 is a schematic diagram of a backlight module according to an embodiment of the invention. Referring to FIG. 1, the backlight module 100 includes a light box 110, at least one light source 120, and a plurality of reflective layers 130. The light box 110 has a light exit opening 112 and a bottom portion 114 opposite the exit pupil aperture 112. The light source 120 is disposed in the light box 110. In addition, a plurality of reflective layers 130 are disposed on the bottom wall 114 of the light box 11 , and the reflective layer 13 适于 is adapted to reflect the light emitted by the light source 120 to the light exit opening 126 . In contrast, since the luminance of the light source 120 is not easily uniform, when the backlight module 1 is lit, the luminance emitted by the light source 12 in the light box 11 is not uniform. Therefore, in the present embodiment, a plurality of luminance regions P are defined in the light box 11A, wherein the regions where the light source 12 emits relatively bright light and the regions where the light source 120 emits relatively dark light can be defined as different luminance regions P, respectively. In other words, the plurality of luminance regions P defined in the light box 110 (10) are divided according to the luminance of the light source 12 配置 disposed in the light box 11 , and the reflective layers 130 corresponding to the respective luminance regions P have different reflections. The light source 120 is composed, for example, of a plurality of cold cathode fluorescent tubes substantially parallel to each other (as shown in FIG. Each of the A-pole lamps has a high-voltage electrode terminal 122 and a low-voltage electrode terminal 124. Meanwhile, the high-voltage electrode terminals 122 of each of the light sources 120 shown in FIG. 1 are disposed on the same side and the low-voltage electrode ends. 124 are all arranged on the opposite side. By the prior art 9 201007281 ----OZ1TW 24609twf.doc/n Kenting: the secondary t-cathode light lamp official will gradually lose during the process of 'current from the high voltage electrode end 122 ^ to the low voltage electrode end 124, The light source 12 is turned on, and the luminance of the low voltage electrode terminal 124 is relatively low. Here, the area of the light box ιι 对应 corresponding to the light source 120 having a higher luminance is defined as the first luminance area P1. In addition, the area of the light box 110 corresponding to the lower luminance of the light source 120, that is, the area corresponding to the low voltage electrode end 124, may be defined as the second luminance area P2. In order to achieve a certain uniformity of the light uniformity of the backlight module 100, it is necessary to make the first luminance region P1 and the second luminance region P2 exhibit substantially the same luminance. Therefore, in the present embodiment, the reflective layer 130 ′ having different light reflectances is disposed at the bottom 144 of the light box 110 , wherein the first reflective layer 132 having a small light reflectance is correspondingly disposed in the first luminance region, and the light reflectance is larger. The two reflective layers 134 are correspondingly disposed in the second luminance region P2. In fact, these reflective layers 130 of different reflectivities may also be defined herein as a patterned reflective structure (not labeled) to provide a different degree of reflection in different regions of the backlight module 1 分别, respectively. In other words, the patterned reflective structure (not shown) is disposed in the moonlight module 100 to define a plurality of reflective regions (not labeled) of different reflectivities. Therefore, the present invention does not limit the arrangement of the patterned reflective structure (not shown) in the backlight module 100. When the backlight module 100 is illuminated, the luminance exhibited by the first luminance region P1 includes the sum of the luminance of the light emitted by the light source 120 in the first luminance region P1 and the light reflected by the first reflective layer 132. Similarly, the luminance exhibited by the second luminance region P2 is the luminance of the light emitted by the light source 120 in the second luminance region P2 and the luminance of the light reflected by the second reflective layer 134. 201007281 -------- JZ1TW 24609twf. Doc/n and . Although the light source 120 itself has a relatively dark luminance corresponding to the second luminance region P2, the second reflective layer 134 has a large light reflectivity, so that the light emitted by the light source 120 in the second luminance region P2 can be more It is efficiently reflected to the light exit opening 112. In contrast, since the luminance of the light source corresponding to the first luminance region pi is bright, the reflective layer 132 having a light reflectance lower than that of the reflective layer 134 can be used.
因此，經由具有不同光反射率的第一反射層132及第 一反射層134的補償之後，可使第一輝度區ρ〗與第二輝 度區P2所呈現的輝度大致相同，進而讓背光模組1〇〇具 有良好的出光均齊度。 另外，當各個光源120的高壓電極端ι22不一定位於 相同-側’也就是部分光源12G的高壓電極端122位於左 側而其他部分光源120之高麗電極端122位於右側時，、可 ，廷些光源120的高壓電極端122與低壓 124 中定義出多個第—輝度區P1以及多個 Ϊΐ S:2二此時’則可對應各個第-輝度區中配 =73:，32’而對應各個第二輝度區、置第二反 除此之外，冷陰極螢光燈管的發光 間的增加以及燈箱110内部的雜變化:在使用枯 不同的發光輝度。因此，多個輝度不同區域呈現 ==時可能發生的溫度二定義背 不，輝度區p不-^要對應光源12G的^話山說’ 或疋低壓電極端124而作劃分。 呵電極k 122 201007281 ------)Z1TW 24609twf.doc/n §然’輝度區P的劃分也不限定於只區分成第一輝度 區P1與第一輝度區P2 ’在不同的背光模組1〇〇設計中， 可以在燈箱110中更定義出第三、第四、第五…等多個輝 度區p。進一步來說’當燈箱110中更被定義出第三、第 四、第五…等多個輝度區P時，對應於各輝度區p的反射 層130之反射率應與各輝度區P中光源12〇發光輝度分佈 成反比。也就是說，光源120發光輝度相對較暗的輝度區 φ P中應對應配置光反射率較高的反射層130。反之，則應 配置光反射率較低的反射層130。如此一來，背光模組1〇〇 就可以具有良好的出光均齊度。 圖2繪示為圖丨之背光模組沿著光源之延伸方向所繪 示之剖面圖。請參照圖2，反射層130可以由多個具有不 同光反射率之反射片所組成，且各個反射片可藉由黏著層 ^0與燈箱110之底部114黏著在一起。黏著層14〇可以 是雙面膠、熱固化膠或光固化膠等。在其他實施例中，各 反射片之間可以有部份區域是相互重疊的。當然，反射層 參13〇並不限於由反射片所組成，舉例而言，反射層⑽也 可以是由多個不同光反射率的反射膜組成。當反射層130 由多個反射膜所組成時，反射層130的形成方式例如是將 不同光反射率之材料藉由塗佈的方式形成於燈箱110之底 告^14。此外，燈箱110上還可以配置光學膜片組15〇以 提高背光模組100的出光品質，此光學膜片組15〇包括擴 散片、增亮片或其組合。 通常’為了得知背光模組100的出光均齊度，可以將 201007281 OZ1TW 24609tw£doc/n 背光模組100劃分出多個測試區域，並將各測試區域所測 得之最小輝度與最大輝度的比值換算成百分比值即可表示 為出光均齊度。其中，若將背光模組劃分成13個測試區域 時，出光均齊度須大於75%才符合檢測規格，且13個測 試區域的劃分方式如圖3A之1〜13所示。 圖3B與圖3C分別為習知背光模組與本發明之背光模 組100之輝度測試結果。請先參照圖3B，由實際測量的結 ❿ 果發現，習知之背光模組在對應光源的低壓電極端區域， 例如是對應測試區域6、9、11之區域，的輝度皆相對較小， 其數值分別為5662、6070及5640。且習知之背光模組出 光均齊度為(5640/8019)xl00%=70%。接著，請參照圖3C， 在相同的光源以及燈箱設計之下，背光模組1〇〇中在對應 光源120的低壓電極端124區域’即對應測試區域6、9、 11之一側’配置光反射率較大的反射層134。由實際測量 結果得知，背光模組1〇〇中對應低壓電極端124之區域所 王現的輝度分別為6350、6500及6300，其皆大於習知之 ® 背光模組在同一區域中所測得的結果，且背光模組1〇〇的 出光均齊度為(6300/8019) χ1〇〇〇/0=78·5%。因此，背光模組 100的設計可有效地改善習知之背光模組出光均齊度不佳 的問題。具體來說’利用對背光模組1〇〇進行不同反射率 之反射片貼附或是反射膜塗佈的製程，便可增進背光模組 的出光均齊度，因此所需成本較其他改善方式低且製程亦 相當簡便。 本發明在此另提出一種液晶顯示裝置，如圖4所示。 13 201007281 rv^ / wz,_j〇i3〇Z1TW 24609twf.doc/n 請參照圖4 ’將上述之背光模組100應用於液晶顯示裝置 400中，使一液晶顯示面板410配置於背光模組1〇0上方。 由於月光模組100提供均勻的輝度予液晶顯示面板4]_〇顯 示圖像，因此液晶顯示裝置400可以具有良好的顯示效果。 當然’本發明並不限定於此’為了提昇液晶顯示裝置 400的顯示效果，背光模組1〇〇還可以有其他的設計方式。 圖5A繪示為本發明另一實施例之背光模組的示意圖，而 φ 圖5B則為圖5A之背光模組沿燈管延伸方向所繪示的剖面 圖。請參照圖5A與圖5B，背光模組500包括一燈箱51〇 以及配置於燈箱510中的燈管520，其中燈箱510包括箱 體512以及位於箱體512上的圖案化反射結構53〇。圖案 化反射結構530包括三個圖案化反射片532、534及536， 其分別具有不同的反射率以分別定義出第一區R1、第二區 R2及第三區R3。 燈管520例如是冷陰極螢光燈管，且燈管52〇在高壓 電極端522所呈現的輝度較高，而在低壓電極端524所呈 ® 現的輝度較低。所以，為了使背光模組5〇〇具有良好的出 光均齊度，反射板532所提供的反射率可以是大於反射板 536所提供的反射率。換言之，第一區R1的反射率高於反 射區R3的反射率。另外，背光模组5〇〇實際應用於液晶 顯不^時’是以直下式方式配置的。此外，背光模組500 =點亮時，燈箱51〇内部的溫度分佈並不均勻，例如高壓 端的溫度較高’高溫會使燈管的輝度降低，導致高壓端的 輝度低於中央的輝度燈管520在燈箱510中央區域所呈現 201007281 * ν / v^-,w^OZlTW 24609twf.doc/n 的輝度可能較大。因此，本實施例中圖案化反射片534的 反射率例如是小於圖案化反射片536以使背光模組500的 出光均齊度提升。也就是說，第二區R2的反射率小於第 一區R1以及第三區R3的反射率。 請參照圖5B，燈箱510的箱體512例如具有一底壁 514及多個側壁516，其中本實施例的箱體512例如是由白 色反射板製成。此外，圖案化反射結構530在此是配置於 ^ 箱體512的底壁514。因此，箱體512的側壁516會被裸 露，而箱體512本身的反射率也會影響被反射的光線。在 其他實施例中，圖案化反射結構530也可以配置於箱體512 的側壁516上，或是同時配置於側壁516與底壁514上以 定義出不同反射率的區域R1〜R4。另外，背光模組500上 方也可配置有光學膜150。 實際上，圖案化反射片532、534及536具有不同的 反射率。同時，為了避免圖案化反射片532、534及536 之間的間隙影響背光模組500中各區域反射率分佈，圖案 ❹ 化反射片532、534及536的部份區域例如是互相重疊。此 時’暴露出來的圖案化反射片532、534及536以及箱體 512的侧壁516分別定義出不同反射率的區域R1〜R4。更 具體而言，圖案化反射片532、534及536是藉由一黏著層 504貼附於箱體512上。此黏著層504包括雙面膠、熱固 化膠或光固化膠等。 當然，本實施例之圖案化反射結構530的設計佈局也 可以是利用圖案化反射薄膜來取代圖案化反射片532、534 15 201007281 j. \j /Therefore, after the compensation of the first reflective layer 132 and the first reflective layer 134 having different light reflectances, the luminances of the first luminance region ρ and the second luminance region P2 can be substantially the same, thereby allowing the backlight module to be 1〇〇 has a good uniformity of light output. In addition, when the high voltage electrode end ι 22 of each light source 120 is not necessarily located on the same side, that is, the high voltage electrode end 122 of the partial light source 12G is located on the left side and the high electrode end 122 of the other partial light source 120 is located on the right side, The high-voltage electrode end 122 and the low-voltage 124 of the light source 120 define a plurality of first-luminance regions P1 and a plurality of ΪΐS:2 two at this time, and then corresponding to each of the first-luminance regions: 73:, 32' Corresponding to each of the second luminance regions and the second rejection, the increase in the illumination between the cold cathode fluorescent tubes and the variation in the interior of the light box 110: different luminances are used. Therefore, the temperature of the different luminance regions exhibiting == may occur when the temperature is defined by the second, and the luminance region p is not -^ corresponding to the light source 12G or the low voltage electrode terminal 124. Electrode k 122 201007281 ------) Z1TW 24609twf.doc/n § However, the division of the luminance region P is not limited to the backlight mode which is different only in the first luminance region P1 and the first luminance region P2 ′. In the group 1 design, a plurality of luminance regions p such as third, fourth, fifth, etc. may be further defined in the light box 110. Further, when a plurality of luminance regions P such as third, fourth, fifth, etc. are defined in the light box 110, the reflectance of the reflective layer 130 corresponding to each luminance region p should be the light source in each luminance region P. The 12 〇 luminance distribution is inversely proportional. That is to say, the light-emitting region 120 should have a reflective layer 130 having a relatively high light reflectance in the luminance region φ P in which the light-emitting luminance is relatively dark. Conversely, a reflective layer 130 having a lower light reflectance should be disposed. In this way, the backlight module 1 〇〇 can have good uniformity of light output. 2 is a cross-sectional view of the backlight module of FIG. 2 taken along the direction in which the light source extends. Referring to FIG. 2, the reflective layer 130 may be composed of a plurality of reflective sheets having different light reflectivities, and each of the reflective sheets may be adhered to the bottom 114 of the light box 110 by an adhesive layer. The adhesive layer 14 can be a double-sided tape, a heat-curable adhesive or a photo-curable adhesive. In other embodiments, there may be partial regions between the reflective sheets that overlap each other. Of course, the reflective layer 13 is not limited to being composed of a reflective sheet. For example, the reflective layer (10) may also be composed of a plurality of reflective films of different light reflectivities. When the reflective layer 130 is composed of a plurality of reflective films, the reflective layer 130 is formed by, for example, forming a material having different light reflectances on the bottom of the light box 110 by coating. In addition, the optical film set 15 can be disposed on the light box 110 to improve the light output quality of the backlight module 100. The optical film set 15A includes a diffusion sheet, a brightness enhancement sheet or a combination thereof. Generally, in order to know the uniformity of the light output of the backlight module 100, the 201007281 OZ1TW 24609 tw doc/n backlight module 100 can be divided into a plurality of test areas, and the minimum luminance and maximum luminance measured in each test area can be determined. The conversion of the ratio into a percentage value can be expressed as the uniformity of the light output. If the backlight module is divided into 13 test areas, the uniformity of the light emission must be greater than 75% to meet the detection specifications, and the division manner of the 13 test areas is shown in FIGS. 1A to 13 of FIG. 3A. 3B and 3C show the luminance test results of the conventional backlight module and the backlight module 100 of the present invention, respectively. Referring to FIG. 3B, it is found from the actual measured result that the brightness of the conventional backlight module in the low-voltage electrode end region of the corresponding light source, for example, the area corresponding to the test areas 6, 9, 11 is relatively small. The values are 5662, 6070 and 5640 respectively. Moreover, the uniformity of the backlight module of the conventional backlight module is (5640/8019) x l00%=70%. Next, referring to FIG. 3C, under the same light source and light box design, the backlight module 1 is disposed in the region of the low-voltage electrode end 124 of the corresponding light source 120, that is, on one side corresponding to the test area 6, 9, 11 The reflective layer 134 has a large light reflectance. According to the actual measurement results, the luminances of the regions corresponding to the low-voltage electrode ends 124 of the backlight module 1 are 6350, 6500, and 6300, respectively, which are larger than those of the conventional® backlight module measured in the same area. As a result, the uniformity of the light output of the backlight module 1〇〇 is (6300/8019) χ1〇〇〇/0=78·5%. Therefore, the design of the backlight module 100 can effectively improve the problem of poor uniformity of the light output of the conventional backlight module. Specifically, the process of using the reflective sheet attaching or reflecting film coating of the backlight module 1 不同 can improve the uniformity of the light output of the backlight module, so the cost is better than other improvement methods. Low and the process is quite simple. The present invention further proposes a liquid crystal display device as shown in FIG. 13 201007281 rv^ / wz, _j〇i3〇Z1TW 24609twf.doc/n Referring to FIG. 4, the backlight module 100 described above is applied to the liquid crystal display device 400, and a liquid crystal display panel 410 is disposed in the backlight module 1 Above 0. Since the moonlight module 100 provides uniform brightness to the liquid crystal display panel 4]_〇 to display an image, the liquid crystal display device 400 can have a good display effect. Of course, the present invention is not limited thereto. In order to enhance the display effect of the liquid crystal display device 400, the backlight module 1 may have other design methods. FIG. 5A is a schematic diagram of a backlight module according to another embodiment of the present invention, and FIG. 5B is a cross-sectional view of the backlight module of FIG. 5A along a direction in which the lamp tube extends. Referring to FIG. 5A and FIG. 5B, the backlight module 500 includes a light box 51A and a light tube 520 disposed in the light box 510. The light box 510 includes a box 512 and a patterned reflective structure 53〇 on the box 512. The patterned reflective structure 530 includes three patterned reflective sheets 532, 534, and 536 having different reflectivities to define a first region R1, a second region R2, and a third region R3, respectively. The lamp 520 is, for example, a cold cathode fluorescent lamp, and the lamp 52 has a higher luminance at the high voltage electrode end 522 and a lower luminance at the low voltage electrode end 524. Therefore, in order to have a good uniformity of the light output of the backlight module 5, the reflectance provided by the reflective plate 532 may be greater than that provided by the reflective plate 536. In other words, the reflectance of the first region R1 is higher than the reflectance of the reflective region R3. In addition, the backlight module 5 is actually applied to the liquid crystal display when it is disposed in a direct-down manner. In addition, when the backlight module 500 is turned on, the temperature distribution inside the light box 51 is not uniform, for example, the high temperature of the high voltage end is high. The high temperature causes the brightness of the lamp to decrease, and the brightness of the high voltage end is lower than that of the central brightness lamp 520. In the central area of the light box 510, the brightness of 201007281 * ν / v^-, w^OZlTW 24609twf.doc/n may be large. Therefore, the reflectance of the patterned reflective sheet 534 in this embodiment is, for example, smaller than that of the patterned reflective sheet 536 to improve the uniformity of the light output of the backlight module 500. That is, the reflectance of the second region R2 is smaller than that of the first region R1 and the third region R3. Referring to Fig. 5B, the casing 512 of the light box 510 has, for example, a bottom wall 514 and a plurality of side walls 516, wherein the casing 512 of the present embodiment is made of, for example, a white reflecting plate. In addition, the patterned reflective structure 530 is here disposed on the bottom wall 514 of the housing 512. Therefore, the side wall 516 of the case 512 is exposed, and the reflectivity of the case 512 itself also affects the reflected light. In other embodiments, the patterned reflective structure 530 can also be disposed on the sidewall 516 of the housing 512 or simultaneously disposed on the sidewall 516 and the bottom wall 514 to define regions R1 R R4 of different reflectivity. In addition, an optical film 150 may be disposed above the backlight module 500. In fact, the patterned reflective sheets 532, 534 and 536 have different reflectivities. Meanwhile, in order to prevent the gap between the patterned reflection sheets 532, 534, and 536 from affecting the reflectance distribution of each region in the backlight module 500, the partial regions of the pattern deuteration reflection sheets 532, 534, and 536 overlap each other, for example. At this time, the exposed patterned reflection sheets 532, 534 and 536 and the side walls 516 of the case 512 define regions R1 to R4 having different reflectances, respectively. More specifically, the patterned reflective sheets 532, 534, and 536 are attached to the case 512 by an adhesive layer 504. The adhesive layer 504 includes a double-sided tape, a thermosetting adhesive or a photocurable adhesive or the like. Of course, the design layout of the patterned reflective structure 530 of this embodiment may also be replaced by the patterned reflective film 532, 534 15 201007281 j. \j /
OZITW 24609twf.doc/n 及536。也就是說，本發明並不排除利用不同反射率的圖 案化反射薄膜(未繪示)在背光模組500中定義出多個反射 區R1〜R4。 圖6繪示為本發明之又一實施例的背光模組的示意 圖。請參照圖6 ’背光模組600與前述的背光模組5〇〇相 似’其中圖案化反射片632及634A〜D的設計與上述的圖 案化反射結構530不同。由於，燈管520本身的發光輝度 φ 並非均等的，且背光模組600被開啟時，箱體512内的溫 度分佈也會影響各燈管520的發光效能。所以，本實施例 在此提出於箱體512内可能較暗的四個角落分別配置反射 率較高的圖案化反射片634A〜D。 圖案化反射片634A〜D實質上可以具有不同的反射 率。舉例來說’圖案化反射片634A及634D對應配置於燈 官520的高壓電極端522 ’而圖案化反射片634B及634C 對應配置於燈管520的低壓電極端524。因此，圖案化反 射片634A及634D可以提供相對較低的反射率，而圖案化 © 反射片634B及634C應提供相對較高的反射率。此外，位 於角洛的這些圖案化反射片634A〜D也可以是不同反射率 的圖案化反射薄膜等，其用以定義出多個不同反射率的反 射區R1〜R5並使背光模組600有良好的出光均齊度。 圖7A與圖7B分別為本發明之再一實施例的背光模組 的上視示意圖及剖面示意圖。請同時參照圖7A與圖7B， 背光模組700包括白色反射殼體712、多個燈管720以及 箱體740。箱體740包覆部份白色反射殼體712，而燈管 16 201007281 * v / wA._«wjuy〇ZlTW 24609twf.doc/n 720配置於白色反射殼體712中。實質上’箱體74〇與白 色反射殼體712共同構成一可在不同區域提供不同反射率 的燈箱（未標示）。另外’燈管720的兩端分別為高壓電極 端722及低壓電極端724。白色反射殼體712具有多個開 口 714A、714B，而開口 714A、714B暴露出部分箱體74〇, 以定義出多個不同反射率的第一區R1與第二區R2。實際 上，開口 714A、714B所在區域定義出兩個第—區R1，而 參 其他部分之白色反射殼體712所在位置定義出第二區 R2。第二區R2例如是位於兩個第一區R1之間。 相體740的材質一般來說是金屬材質，而白色反射殼 體712則是由白色的塑膠材質製成，且白色反射殼體712 所能提供的反射率較箱體740所能提供的反射率高。也就 是說，開口 714A、714B可以定義出反射率較低的第一區 R1，而白色反射殼體712所在區域則定義反射率較高的第 二區R2。另外，燈管720對應高壓電極端722處的發光輝 度較高而對應於低壓電極端724處的發光輝度較低。所 ® 以’本實施例例如是使面積較大的開口 714A對應高壓電 極端722處設置，而面積相對較小的開口 714B則對應低 壓電極端724處設置。 上述之開口 714A、714B的位置可依照實際需求設 置。例如，也可以將開口 714A、714B對應設置在白色反 射殼體712的側邊，或是在白色反射殼體712對應箱體740 底部的中央部份。 由於，開口 714A、714B的配置位置以及面積大小可 17 201007281 rU/^J〇D〇ZlTW 24609twf.doc/n 以隨著不同背光模組700的設計而有各種不同的變化。所 以’本實施例提出藉由不同面積大小的開口 714A、714B 使背光模組700各個區域的整體反射率獲得調整。因此， 背光模組700可以具有良好的出光均齊度，且背光模組7 〇 〇 應用於液晶顯示裝置時也有助於提升液晶顯示裝置的顯示 品質。實質上，上述各個實施範例所提出的背光模組5〇〇、 600、700都可以應用於圖4所繪示的液晶顯示裝置中或是 φ 其他對於出光均齊度要求較高的電子產品當中。另.外，本 實施例中的開口 714A、714B設計更可以與前述實施例中 的圖案化反射片或是圖案化反射薄膜搭配配置，以使背光 模組700具有均勻的出光效果。 綜上所述’本發明之背光模組與液晶顯示裝置至少具 有以下所述之優點。本發明利用不同的圖案化反射結構提 供不同的光反射率以對光源的不均勻發光進行補償，使背 光模組具有良好的出光均齊度。由於本發明之背光模組具 φ 有良好的出光均齊度，所以應用於液晶顯示裝置時，可以 提供良好品質的面光源’而使液晶顯示裝置具有良好的顯 示效果。再者，本發明之背光模組中，藉由簡單的反射片 貼附、在燈箱中形成開口或是反射膜塗佈等製程以形成圖 案化反射結構，因此本發明之背光模組與液晶顯示裝置所 需製造成本較其他補償方式低且製程步驟簡易。 雖然本發明已以較佳實施例揭露如上，然其並非用以 限定本發明，任何所屬技術領域中具有通常知識者，在不 脫離本發明之精神和範圍内，當可作些許之更動與潤飾， 18 201007281 rw/u^〇D〇ziTw 24609twf.doc/n ^本發明之賴範圍當視後附之申請專利翻所界定者 【圖式簡單說明】 圖1繪示為本發明之一實施例之背光模組的示意圖。 -圖2緣示為圖k背光模组沿著光源之延伸方向所洛 示之剖面圖。 '曰 Ο -圖3A為背光模組進行輝度測試時，測試區域劃分 示意圖。 _ 、 圖3B為習知之背光模組進行輝度測試的結果。 圖3C為本發明之背光模組1 〇〇進行輝度測試的結果。 圖4繪示為本發明之一實施例之液晶顯示裝置的示咅 圖。 ％、 圖5Α繪示為本發明另一實施例之背光模組的示意 圖。 圖5Β為圖5Α之背光模組沿燈管延伸方向所繪示的剖 響 面圖。 圖6繪示為本發明之又一實施例的背光模組的示意 圖。 〜 圖7Α與圖7Β分別為本發明之再一實施例的背光模組 的上視示意圖及剖面示意圖。 【主要元件符號說明】 100、500、600、700 :背光模組 19 24609twf.doc/n 201007281OZITW 24609twf.doc/n and 536. That is, the present invention does not exclude the use of a patterned reflective film (not shown) of different reflectances to define a plurality of reflective regions R1 R R4 in the backlight module 500. FIG. 6 is a schematic view of a backlight module according to still another embodiment of the present invention. Referring to Fig. 6, the backlight module 600 is similar to the backlight module 5' described above. The design of the patterned reflection sheets 632 and 634A to D is different from that of the above-described patterned reflection structure 530. Since the luminance φ of the lamp 520 itself is not uniform, and the backlight module 600 is turned on, the temperature distribution in the casing 512 also affects the luminous efficacy of each of the lamps 520. Therefore, in this embodiment, it is proposed that the patterned reflection sheets 634A to 634 having a high reflectance are disposed in the four corners which may be dark in the casing 512. The patterned reflective sheets 634A-D may have substantially different reflectivities. For example, the patterned reflective sheets 634A and 634D are disposed at the high voltage electrode end 522' of the lamp 520, and the patterned reflective sheets 634B and 634C are disposed at the low voltage electrode end 524 of the bulb 520. Thus, patterned reflective sheets 634A and 634D can provide relatively low reflectivity, while patterned © reflective sheets 634B and 634C should provide relatively high reflectivity. In addition, the patterned reflective sheets 634A-D located at the corners may also be patterned reflective films of different reflectivity, etc., for defining a plurality of reflective regions R1 R R5 of different reflectances and having the backlight module 600 Good light is uniform. 7A and 7B are respectively a top view and a cross-sectional view of a backlight module according to still another embodiment of the present invention. Referring to FIG. 7A and FIG. 7B simultaneously, the backlight module 700 includes a white reflective housing 712, a plurality of lamps 720, and a housing 740. The box 740 encloses a portion of the white reflective housing 712, and the tube 16 201007281 * v / wA._«wjuy〇ZlTW 24609twf.doc/n 720 is disposed in the white reflective housing 712. Essentially, the 'box 74' and the white reflective housing 712 together form a light box (not labeled) that provides different reflectivities in different areas. Further, both ends of the lamp tube 720 are a high voltage electrode end 722 and a low voltage electrode end 724, respectively. The white reflective housing 712 has a plurality of openings 714A, 714B, and the openings 714A, 714B expose a portion of the housing 74" to define a plurality of first and second regions R1 and R2 of different reflectivities. In practice, the area where the openings 714A, 714B are located defines two first-regions R1, and the position of the white reflective housing 712 of the other portions defines the second region R2. The second zone R2 is, for example, located between the two first zones R1. The material of the phase body 740 is generally made of metal, and the white reflective housing 712 is made of white plastic material, and the reflectivity of the white reflective housing 712 can be higher than that provided by the box 740. high. That is, the openings 714A, 714B define a first region R1 having a lower reflectance, and the region where the white reflective casing 712 is located defines a second region R2 having a higher reflectance. In addition, the illuminating luminance of the lamp tube 720 corresponding to the high voltage electrode end 722 is higher and the illuminating luminance corresponding to the low voltage electrode end 724 is lower. In the present embodiment, for example, the opening 714A having a larger area is disposed corresponding to the high voltage electrode 722, and the opening 714B having a relatively small area is disposed corresponding to the low piezoelectric terminal 724. The positions of the openings 714A, 714B described above can be set according to actual needs. For example, the openings 714A, 714B may be correspondingly disposed on the side of the white reflective housing 712, or in the central portion of the white reflective housing 712 corresponding to the bottom of the housing 740. Since the arrangement positions and the area sizes of the openings 714A, 714B are 17 201007281 rU/^J〇D〇ZlTW 24609twf.doc/n, there are various variations depending on the design of the different backlight modules 700. Therefore, the present embodiment proposes that the overall reflectance of each region of the backlight module 700 is adjusted by the openings 714A, 714B of different area sizes. Therefore, the backlight module 700 can have good uniformity of light output, and the backlight module 7 〇 应用于 can also improve the display quality of the liquid crystal display device when applied to the liquid crystal display device. In essence, the backlight modules 5〇〇, 600, and 700 proposed in the above embodiments can be applied to the liquid crystal display device illustrated in FIG. 4 or among other electronic products having high requirements for uniformity of light output. . In addition, the design of the openings 714A, 714B in this embodiment can be configured in combination with the patterned reflective sheet or the patterned reflective film in the foregoing embodiment, so that the backlight module 700 has a uniform light-emitting effect. As described above, the backlight module and the liquid crystal display device of the present invention have at least the advantages described below. The invention utilizes different patterned reflection structures to provide different light reflectances to compensate for uneven illumination of the light source, so that the backlight module has good uniformity of light output. Since the backlight module of the present invention has good uniformity of light output, it can provide a good quality surface light source when applied to a liquid crystal display device, and the liquid crystal display device has a good display effect. Furthermore, in the backlight module of the present invention, a process of attaching a simple reflective sheet, forming an opening in a light box, or coating a reflective film to form a patterned reflective structure, and thus the backlight module and the liquid crystal display of the present invention The manufacturing cost of the device is lower than other compensation methods and the process steps are simple. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. , 18 201007281 rw/u^〇D〇ziTw 24609twf.doc/n ^ The scope of the present invention is defined by the appended patent application. [FIG. 1 illustrates an embodiment of the present invention. A schematic diagram of a backlight module. - Figure 2 is a cross-sectional view of the backlight module of Figure k taken along the direction in which the light source extends. '曰 Ο - Figure 3A is a schematic diagram of the test area division when the backlight module is tested for luminance. _ , FIG. 3B is the result of the luminance test of the conventional backlight module. FIG. 3C is a result of performing a luminance test on the backlight module 1 of the present invention. Fig. 4 is a view showing a liquid crystal display device according to an embodiment of the present invention. FIG. 5 is a schematic view of a backlight module according to another embodiment of the present invention. Figure 5 is a cross-sectional view of the backlight module of Figure 5 taken along the direction in which the tube extends. FIG. 6 is a schematic view of a backlight module according to still another embodiment of the present invention. FIG. 7A and FIG. 7B are respectively a top view and a cross-sectional view of a backlight module according to still another embodiment of the present invention. [Main component symbol description] 100, 500, 600, 700: backlight module 19 24609twf.doc/n 201007281
L V /UJL_i OZ1TW 110、510 :燈箱 112 :出光口 114、514 :底壁 120 :光源 122、522、722 :高壓電極端 124、524、724 :低壓電極端 130 :反射層 132 134 140 150 400 410 512 參 第一反射層 第二反射層 黏著層 光學膜片組 液晶顯不裝置 液晶顯不面板 740 :箱體 516 :側壁 520、720 :燈管 ❹ 530 :圖案化反射結構 532、534、536、632、634A〜D :圖案化反射片 712:白色反射殼體 714A、714B :開口 P :輝度區 P1 :第一輝度區 P2 :第二輝度區LV /UJL_i OZ1TW 110,510: Light box 112: light exit 114, 514: bottom wall 120: light source 122, 522, 722: high voltage electrode end 124, 524, 724: low voltage electrode end 130: reflective layer 132 134 140 150 400 410 512 reference first reflective layer second reflective layer adhesive layer optical film group liquid crystal display device liquid crystal display panel 740: housing 516: side walls 520, 720: lamp tube 530: patterned reflective structure 532, 534, 536, 632, 634A to D: patterned reflective sheet 712: white reflective housing 714A, 714B: opening P: luminance region P1: first luminance region P2: second luminance region
Rl、R2、R3、R4、R5 :區域 20Rl, R2, R3, R4, R5: area 20