201011413 :206-0811 28556twf.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侧面入光式背光模組，且特別是 有關於一種可有效提升出光輝度的侧面入光式背光模組。 【先前技術】 液晶顯示装置的主要構件包括液晶面板以及背光模 組。液晶面板不會自行發光，因而需要背光模組提供足夠 的亮度給予液晶面板，使液晶顯示裝置能夠顯示畫面。因 此’背光模組所提供的輝度（brightness)強弱會影響液晶 顯示裝置的顯示品質。 圖1為習知一種側面入光式背光模組的立體示意圖。 圖2為沿圖1之剖線AA’所繪示的剖面圖。請同時參考圖 1及圖2 ’背光模組1〇包括一導光板1〇〇、一框架2〇〇以 及多個位於框架200内的發光二極體220 (Light Emitting Diode’LED)。框架200具有一底壁200a以及一侧壁2〇〇b。 Φ 在此僅繪示一個發光二極體220為例。實際上，數個配置 於電路板230上的發光二極體220例如以規則的間距平行 地排列於框架200内，且發光二極體220所發出的光線經 由導光板100的作用後，產生一輝度均勻的面光源。 如圖1及圖2所示，導光板1〇〇具有一鄰近發光二極 體220的入光面i〇0a以及一平行於底壁2〇〇a的出光面 100b。因為框架200的侧壁200b垂直於底壁2〇〇a，以至 於發光二極體220所發射的光線以平行於底壁2〇〇a的方向 5 201011413 28556twf.d〇c/n γγχ ^/^-0206-0811 =時’此部分的光線無法有效地自出光面lGGa被導出。 J二之’原本自光源水平射出的光、線0僅能被侧壁200b ’回水平方向上或是被侧壁2_吸收而無法有效被導 出。因此’背光模組1〇的鎌_效率有限並且出光輝度 無法有效提升，進而影響液晶顯示裝置的顯示品質。 【發明内容】 ❷ 本發明提供一種側面入光式背光模組以及應用此背光 模組的顯示器模組，其可有效地利用光源所發出的光線以 提升輝度。 ^ 本發明提出一種侧面入光式背光模組，其包括一導光 板、一框架以及至少一光源。導光板具有一入光面、一出 光面且出光面與入光面相鄰。光源配置於入光面之一侧。 框架具有一反射底壁與一反射侧壁，且反射底壁連接於反 射侧壁。導光板與光源配置於框架中。出光面遠離反射底 壁，而入光面遠離反射侧壁，其中反射底壁的法向量與反 ® 射側壁間的交角為5°至60°。並且，反射底壁與反射侧壁 對光線的反射率為85%〜100%。 在本發明之一實施例中，上述反射側壁為平面。 在本發明之一實施例中，上述交角自反射側壁與反射 底壁之連接處向外逐漸改變。反射側壁例如為弧面。此外， 上述之交角可以是自反射側壁與反射底壁之連接處向外逐 漸變小。實質上，交角也可以是自反射側壁與反射底壁之 連接處向外逐漸變大。 6 201011413 wj_>/u->-\_^206-0811 28556twf.doc/n 在本發明之一實施例中，上述框架為一體成型的金屬 框架。 在本發明之一實施例中，上述框架為一白色塑膠框 架，且此白色塑膠框架的反射底壁與反射侧壁的表面粗糙 度小於等於0.01釐米（mm)。 在本發明之一實施例中’上述框架包括一非鏡反射殼 體以及一反射片。非鏡反射殼體具有一底壁以及一侧壁， 且反射片貼附於底壁以及侧壁上以構成反射底壁以及反射 側壁。上述反射片例如具有多個孔洞，其位於侧壁與底壁 之連接處。具體而言，上述反射片包括一第一子反射片以 及一第二子反射片，第一子反射片貼附於底壁上以構成反 射底壁，第二子反射片貼附於侧壁上以構成反射侧壁。 在本發明之一實施例中’上述框架包括一非鏡反射殼 體以及一反射材料層。非鏡反射殼體具有一底壁以及一側 壁’且反射材料層塗佈於底壁以及侧壁上以構成反射底壁 以及反射侧壁。 在本發明之一實施例中，上述反射侧壁與反射底壁的 法向量間的交角實質上為30。。 在本發明之一實施例中，上述光源包括多個發光二極 體。 在本發明之一實施例中，上述光源包括一燈管。 本發明提出一種顯示器模組’其包括一導光板、一框 架、至少-光源、-顯示器面板以及—光學膜。導光板具 有一入光面、一出光面且出光面與入光面相鄰。光源配置 201011413 w j： 7 / v ^-^206-0811 28556twf.doc/n 於入光面之一侧。框架具有一反射底壁與一反射侧壁，且 反射底壁連接於反射侧壁。導光板與光源配置於框架中。 出光面遠離反射底壁，而入光面遠離反射側壁，其中反射 底壁的法向量與反射侧壁間的交角為5。至6〇。。並且，反 射底壁與反射侧壁對光線的反射率為85°/❶〜1〇〇%。顯示器 面板設於導光板的出光面一側，且光學膜設於顯示器 與導光板之間。201011413 :206-0811 28556twf.doc/n IX. Description of the Invention: [Technical Field] The present invention relates to a side-lit backlight module, and more particularly to a side entry that can effectively enhance the brightness Light backlight module. [Prior Art] The main components of the liquid crystal display device include a liquid crystal panel and a backlight module. The liquid crystal panel does not emit light by itself, and thus the backlight module is required to provide sufficient brightness to the liquid crystal panel to enable the liquid crystal display device to display a picture. Therefore, the brightness of the backlight module can affect the display quality of the liquid crystal display device. FIG. 1 is a perspective view of a conventional side-lit backlight module. Figure 2 is a cross-sectional view taken along line AA' of Figure 1. Referring to FIG. 1 and FIG. 2 together, the backlight module 1 includes a light guide plate 1 , a frame 2 , and a plurality of light emitting diodes 220 (Light Emitting Diodes) located in the frame 200 . The frame 200 has a bottom wall 200a and a side wall 2〇〇b. Φ Here, only one light-emitting diode 220 is shown as an example. In fact, a plurality of light emitting diodes 220 disposed on the circuit board 230 are arranged in parallel in the frame 200 at regular intervals, for example, and the light emitted by the light emitting diode 220 passes through the light guide plate 100 to generate a light. A uniform surface light source with a uniform brightness. As shown in Fig. 1 and Fig. 2, the light guide plate 1 has a light incident surface i 〇 0a adjacent to the light emitting diode 220 and a light exit surface 100 b parallel to the bottom wall 2 〇〇 a. Because the side wall 200b of the frame 200 is perpendicular to the bottom wall 2〇〇a, the light emitted by the light-emitting diode 220 is parallel to the direction of the bottom wall 2〇〇a 5 201011413 28556twf.d〇c/n γγχ ^/ ^-0206-0811 = When 'the light of this part cannot be effectively derived from the light surface lGGa. The light and line 0 originally emitted from the light source can only be horizontally absorbed by the side wall 200b' or absorbed by the side wall 2_ and cannot be effectively guided. Therefore, the 镰_ efficiency of the backlight module 1 is limited and the luminance can not be effectively improved, thereby affecting the display quality of the liquid crystal display device. SUMMARY OF THE INVENTION The present invention provides a side-lit backlight module and a display module using the same, which can effectively utilize the light emitted by the light source to enhance the brightness. The invention provides a side-lit backlight module comprising a light guide plate, a frame and at least one light source. The light guide plate has a light incident surface and a light exit surface, and the light exit surface is adjacent to the light incident surface. The light source is disposed on one side of the light incident surface. The frame has a reflective bottom wall and a reflective side wall, and the reflective bottom wall is coupled to the reflective side wall. The light guide plate and the light source are disposed in the frame. The light exiting surface is away from the reflective bottom wall, and the light incident surface is away from the reflective side wall, wherein the intersection angle between the normal vector of the reflective bottom wall and the reverse side wall is 5° to 60°. Further, the reflectance of the reflective bottom wall and the reflective sidewall is 85% to 100%. In an embodiment of the invention, the reflective sidewall is planar. In one embodiment of the invention, the angle of intersection is gradually changed outwardly from the junction of the reflective sidewall and the reflective bottom wall. The reflective sidewall is, for example, a curved surface. In addition, the above-mentioned intersection angle may be such that the junction between the self-reflecting side wall and the reflective bottom wall gradually decreases outward. In essence, the angle of intersection may also gradually increase outward from the junction of the reflective side wall and the reflective bottom wall. 6 201011413 wj_>/u->-\_^206-0811 28556twf.doc/n In one embodiment of the invention, the frame is an integrally formed metal frame. In an embodiment of the invention, the frame is a white plastic frame, and the surface roughness of the reflective bottom wall and the reflective sidewall of the white plastic frame is less than or equal to 0.01 centimeters (mm). In an embodiment of the invention, the frame comprises a non-mirror reflective housing and a reflective sheet. The non-mirror reflective housing has a bottom wall and a side wall, and the reflective sheet is attached to the bottom wall and the side wall to form a reflective bottom wall and a reflective side wall. The above-mentioned reflection sheet has, for example, a plurality of holes which are located at the junction of the side wall and the bottom wall. Specifically, the reflective sheet includes a first sub-reflective sheet and a second sub-reflecting sheet, the first sub-reflecting sheet is attached to the bottom wall to form a reflective bottom wall, and the second sub-reflecting sheet is attached to the sidewall. To form a reflective sidewall. In an embodiment of the invention, the frame comprises a non-mirror reflective shell and a layer of reflective material. The non-mirror reflective housing has a bottom wall and a side wall ' and a layer of reflective material is applied to the bottom wall and the side walls to form a reflective bottom wall and a reflective sidewall. In an embodiment of the invention, the angle of intersection between the reflective sidewall and the normal vector of the reflective bottom wall is substantially 30. . In an embodiment of the invention, the light source comprises a plurality of light emitting diodes. In an embodiment of the invention, the light source comprises a light tube. The present invention provides a display module 'which includes a light guide plate, a frame, at least a light source, a display panel, and an optical film. The light guide plate has a light incident surface and a light exit surface, and the light exit surface is adjacent to the light incident surface. Light source configuration 201011413 w j: 7 / v ^-^206-0811 28556twf.doc/n on one side of the entrance surface. The frame has a reflective bottom wall and a reflective sidewall, and the reflective bottom wall is coupled to the reflective sidewall. The light guide plate and the light source are disposed in the frame. The light exiting surface is away from the reflective bottom wall, and the light incident surface is away from the reflective sidewall, wherein the angle between the normal vector of the reflective bottom wall and the reflective sidewall is 5. To 6 〇. . Further, the reflectance of the reflecting bottom wall and the reflecting side wall to light is 85 ° / ❶ 〜 1 〇〇 %. The display panel is disposed on the light emitting surface side of the light guide plate, and the optical film is disposed between the display and the light guide plate.
在本發明之一實施例中，上述顯示器面板為液晶顯示 器面板、電濕潤顯示器面板或是電泳式顯示器面板。.” 在本發明之一實施例中，上述光學膜為增光片或是擴 散片其中之一。 基於上述，在本發明中，反射底壁的法向量與反射側 壁間具有一交角，且藉由此交角的設計可使平行於反射底 壁的光線被反射而以一斜角進入導光板。換言之本發明 之背光模組可以有效地利用光源所發出的光線。據此7本 發明所提出的侧面入光式背光模組具備高出光輝度並高光 利用效率等優點。 *為讓本發明之上述和其他目的、特徵和優點能更明顯 易I1 董，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】 圖3為依照本發明之—實齡丨的—面人光式背光 模組的立體示意圖。圖4為沿圖3之剖線bb，所繪示的剖In an embodiment of the invention, the display panel is a liquid crystal display panel, an electrowetting display panel or an electrophoretic display panel. In one embodiment of the present invention, the optical film is one of a brightness enhancement sheet or a diffusion sheet. Based on the above, in the present invention, the normal vector of the reflection bottom wall has an angle of intersection with the reflection sidewall, and The design of the intersection angle enables the light parallel to the reflective bottom wall to be reflected and enters the light guide plate at an oblique angle. In other words, the backlight module of the present invention can effectively utilize the light emitted by the light source. According to the aspect of the present invention, The illuminating backlight module has the advantages of high brightness and high light utilization efficiency. * The above and other objects, features and advantages of the present invention will become more apparent and easy to be exemplified. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3 is a perspective view of a face-to-face human-type backlight module according to the present invention. FIG. 4 is a cross-sectional view along line bb of FIG. Section
S 201011413 W r力 U J-C206-0811 28556twf.doc/n 面圖。請同時參考圖3與圖4，在本實施例中，侧面入光 式背光模組20包括導光板300、框架4〇〇以及至少一光源 5〇〇。導光板300具有一入光面3〇〇a、一出光面3〇%且/出 光面300b與入光面300a相鄰。光源5〇〇則配置於框架4〇〇 中且位於入光面300a之一側。 一般而言，光源500可為一燈管，例如是冷陰極螢光 燈（cold cathode fluorescence lamp, CCFL )，且燈管的形 φ 狀可為常見的”一，，字形狀，或是為”U”字形狀等。此外，光 源500亦可包括多個發光二極體（Light Emitting DiQde， LED)。數個配置於電路板51〇上的發光二極體以規則的 間距平行地排列於框架400内且位於入光面3〇〇&之一侧。 在本實施例中，光源500即以多個發光二極體為例。光源 500所發出的光線經由導光板3〇〇的作用後可形成一均勻 的面光源。當然，發光二極體也可以是以不等間距的方式 排列於入光面300a之一侧，本實施例不以此為限。 詳細而言’框架400具有一反射底壁4〇〇a與一反射側 〇 壁400b ’且反射底壁400a連接於反射側壁400b。實務上， 導光板300配置於框架400中並具有一入光面300a以及鄰 接入光面300a的出光面300b。導光板300的出光面300b 遠離反射底壁400a ’而入光面300a遠離反射側壁400b。 此外，反射底壁400a的法向量P與反射側壁4〇〇b之間的 交角Θ可為5°至60°。也就是說，遠離光源5〇〇的反射侧 壁400b不與反射底壁400a垂直。 在本實施例中，框架400的材質可為金屬並且可藉由 9 201011413 w r y / u3-^206-08 11 28556twf.doc/n 沖壓加工以一體成型的方式製作。金屬材質的框架400可 將光源500所射出的光線反射，而使背光模組2〇能具有良 好的光源利用率。如圖4所示，當光源500射出光線時， 部分的光線會穿過導光板300而從出光面300b射出背光模 組20外（如光線L之行進路線）。其餘的光線會先投射 至框架400，接著再被框架反射出背光模組2〇外（如光線 M、N之行進路線）。 ❹ 詳細而言，投射至反射底壁400a的光線，有部份會直 接被反射並穿過導光板300而射出背光模組20外（如光線 Μ之行進路線）以被利用。同時，另一部份會被反射至反 射侧壁400b。另外’投射至反射側壁400b的光線，部份 會被反射出背光模組20外（如光線N之行進路線），其 餘的光線可能會被反射至導光板3〇〇内再射出至背光模組 20外。 特別的是，習知技術中，反射侧壁200b與反射底壁 200a為相互垂直之設計，所以原本自光源5〇〇水平射出的 光線〇僅能被反射侧壁400b反射回水平方向上而無法有 效被導出。因此，這樣的設計使光源利用率受到侷限。在 本實施例中’反射側壁400b與反射底壁400a的法向量p 相父有一傾斜的角度Θ。如此一來，原本自光源500水平 射出或是原本小角度射出的光線〇可有效地被反射至非水 平方向的路徑上而進一步被利用。與習知技術相較，背光 模組20的輝度與光源5〇〇的光線利用率都可有效被提升。 為使對本實施例之内容及效果能夠更為明瞭，以下將 不同結構設計之背光模組的出光效果進行模擬並製為表格 201011413 τ»* ^/v^-w206-0811 28556twf.doc/n 以利說明。表l為不同結構設計之背光模組的出光效果模 擬結果。由表1可知，藉由改變反射侧壁400b與反射底壁 400a之法向量p的夾角θ可以得到不同的出光效果。在表 1中’第一行由上到下的十個數值個別代表背光模組20 中，反射側壁400b與反射底壁400a之法向量p的失角θ。 在此’反射侧壁400b朝向反射底壁400a傾斜時，夾角θ 標示為一，反之則標示為+。第二行由上到下的十個數值 個別代表採用相鄰左攔的夾角θ時，背光模組的出光功 率，單位為瓦特（w)。第三行為採_則度θ所得出 平均輝度，單位為輝度單位（nits)。第四行為採用個別角 度Θ時，姆於夾角θ等於G。的設相制轉度 分率，單位為％。S 201011413 W r force U J-C206-0811 28556twf.doc/n face diagram. Referring to FIG. 3 and FIG. 4 simultaneously, in the embodiment, the side-lit backlight module 20 includes a light guide plate 300, a frame 4〇〇, and at least one light source 5〇〇. The light guide plate 300 has a light incident surface 3〇〇a, a light exit surface 3〇%, and/the light exit surface 300b adjacent to the light incident surface 300a. The light source 5A is disposed in the frame 4A and located on one side of the light incident surface 300a. In general, the light source 500 can be a light tube, such as a cold cathode fluorescent lamp (CCFL), and the shape of the tube can be a common one, a word shape, or a The U-shaped shape, etc. Further, the light source 500 may further include a plurality of light emitting diodes (LEDs). A plurality of light emitting diodes disposed on the circuit board 51 are arranged in parallel at a regular pitch in the frame. In the present embodiment, the light source 500 is exemplified by a plurality of light-emitting diodes. The light emitted by the light source 500 passes through the light guide plate 3 A uniform surface light source can be formed. Of course, the light emitting diodes can also be arranged on one side of the light incident surface 300a in an unequal pitch, which is not limited thereto. The reflective bottom wall 4A and the reflective side wall 400b' and the reflective bottom wall 400a are connected to the reflective sidewall 400b. In practice, the light guide plate 300 is disposed in the frame 400 and has a light incident surface 300a and an adjacent light incident surface. Light exit surface 300b of 300a. Light exit surface 300b of light guide plate 300 The reflective entrance wall 400a' is separated from the reflective side wall 400b. Further, the angle Θ between the normal vector P of the reflective bottom wall 400a and the reflective sidewall 4b may be 5° to 60°. The reflective sidewall 400b away from the light source 5〇〇 is not perpendicular to the reflective bottom wall 400a. In this embodiment, the material of the frame 400 may be metal and may be by 9 201011413 wry / u3-^206-08 11 28556twf.doc/ n The stamping process is integrally formed. The metal frame 400 can reflect the light emitted by the light source 500, so that the backlight module 2 can have a good light source utilization. As shown in FIG. 4, when the light source 500 is emitted In the case of light, part of the light passes through the light guide plate 300 and exits the backlight module 20 from the light exit surface 300b (such as the path of the light L). The remaining light is first projected onto the frame 400, and then reflected by the frame to the backlight mode. The group 2 is outside (such as the path of the light M, N). ❹ In detail, some of the light projected to the reflective bottom wall 400a is directly reflected and passed through the light guide plate 300 to be emitted outside the backlight module 20 ( Such as the ray of light, the route of travel) At the same time, another part will be reflected to the reflective sidewall 400b. In addition, the light projected to the reflective sidewall 400b will be partially reflected out of the backlight module 20 (such as the path of the light N), and the rest of the light may be It is reflected into the light guide plate 3 and then emitted out of the backlight module 20. In particular, in the prior art, the reflective sidewall 200b and the reflective bottom wall 200a are perpendicular to each other, so originally from the light source 5〇〇 The horizontally emitted light ray can only be reflected back to the horizontal direction by the reflective side wall 400b and cannot be effectively derived. Therefore, such a design limits the utilization of the light source. In the present embodiment, the reflection side wall 400b has a slanted angle Θ with the normal vector p of the reflection bottom wall 400a. In this way, the light ray originally emitted from the light source 500 horizontally or originally emitted at a small angle can be effectively reflected to the non-horizontal path and further utilized. Compared with the prior art, the luminance of the backlight module 20 and the light utilization rate of the light source 5 都 can be effectively improved. In order to make the content and effect of the embodiment more clear, the following is a simulation of the light-emitting effect of the backlight module of different structural design and is formed into a table 201011413 τ»* ^/v^-w206-0811 28556twf.doc/n Eli Description. Table 1 shows the simulation results of the light-emitting effects of the backlight modules of different structural designs. As can be seen from Table 1, different light-emitting effects can be obtained by changing the angle θ between the reflection side wall 400b and the normal vector p of the reflection bottom wall 400a. The ten values from the top to the bottom of the first row in Table 1 individually represent the lost angle θ of the normal vector p of the reflective sidewall 400b and the reflective bottom wall 400a in the backlight module 20. When the reflection side wall 400b is inclined toward the reflection bottom wall 400a, the angle θ is indicated as one, and vice versa. The ten values from the top to the bottom of the second row are the wattage (w) of the backlight module when the angle θ of the adjacent left barrier is used. The third behavior is the average luminance obtained by the degree θ, and the unit is the luminance unit (nits). When the fourth behavior uses an individual angle Θ, the angle θ is equal to G. Set the phase conversion rate, in %.
表1. Θ 角(deg) 出光功率(w) 平均輝度 (nits) 輝度提升(％) 0 0.521 390.79 χ +15deg 0.556 416.46 6.16 +20deg 0.564 422.52 7.51 +25deg 0.572 428.59 8 88 +30deg 0.573 429.89 9.09 +35deg 0.568 425.9 8.24 —20deg 0.56 419.17 6.77 —25deg 0.568 426.03 8.29 —30deg 0.574 430.38 9,19 —35deg 0.571 -—----- 427.91 -------- 8.67 201011413 wt*y/U5-C206-081l 28556twf.doc/n 由表1可知，夹角Θ為±30。時’背光模組20的出光效 果可以具有最佳表現。詳言之，炎角Θ為±30。時，平均輝 度可上升至將近430 nits，且輝度提升百分率可提高至9% 以上。因此，為了使背光模組20達到最佳的出光效率，夾 角Θ例如可採用30。’但本發明不限於此。當背光模組2〇 的尺寸設計或元件配置關係有所變化時，最佳的出光效率 時的夹角Θ也可能並非30。。 參 由上述得知，藉由反射側壁400b不垂直於反射底壁 400a而為一斜邊的設計，可使光源5〇〇所發出的光線有效 地被利用。意即，背光模組20的出光亮度可更為增加，以 有效提升背光模組20的輝度。 請再參考圖4 ’在本實施例中’反射側壁4〇〇b以一平 面為例。然而，在其他實施例中，反射側壁4〇此亦可為一 多階段斜面或是一旅面。 圖5Α及圖5Β為依照本發明之一實施例的兩種側面入 光式夤光模組之框架剖面圖。請同時參考圖5Α及圖5Β， 反射侧壁450b例如為多段平面斜邊所構成，且每段平面斜 邊與反射底壁450a之法向量p的夾角θ並不完全相同。圖 5Α所繪示者為上述夾角θ自反射側壁45⑽與反射底壁 450a之連接處向外逐漸變小，而圖5Β所繪示者為上述夾 角Θ自反射侧壁450b與反射底壁45〇a之連接處向外逐漸 變大。詳細來說，每段平面斜邊的長度可以為相同、不相 同、或是部份相同與部份不同。 圖6A及圖6B為依照本發明之一實施例的又兩種侧面 12 201011413 ：206-0811 28556twf.doc/n 入光式背光模組之框架剖面圖。請同時參考圖6A及圖 6B，在本實施例中，反射侧壁460b例如為一弧面，其中 反射侧壁460b與反射底壁460a法向量P間之交角Θ自反 射側壁460b與反射底壁460a之連接處向外逐漸改變。 圖6A所繪示者為上述交角Θ自反射侧壁460b與反射 底壁460a之連接處向外逐漸變小。相對來說，圖6B所繪 示者為上述交角Θ自反射侧壁460b與反射底壁460a之連 接處向外逐漸變大。此弧面的反射側壁460b與上述之具有 多段斜邊的反射侧壁460b具有相同的功用。舉例而言，藉 由上述反射側壁450b、460b不垂直於反射底壁450a、460a 而為斜邊或弧面的設計，可使平行於反射底壁450a、460a 之光線被反射並斜向射出而有效出光。據此’框架450與 框架460的設計可使光源所發出的光線有效地被利用，更 進一步達到節約能量耗損的功效。 圖7為應用本實施例之側面入光式背光模組的液晶顯 不裝置示意圖。請參考圖7，在本實施例中，將上述之背 光模組20與一液晶面板620組立，使背光模組2〇置於液 晶面板620下，便可組成一液晶顯示裝置6〇〇。由於背光 模組π能夠提供較大輝度的光給予液晶面板62〇，因此液 晶顯示裝置600可具有良好的顯示品質。 此外’為了讓液晶顯示裝置6〇0能夠有更佳的顯示品 質在組裝在背光模組2〇與液晶面板62〇之間亦可設 置:光學膜片_。光學膜片_可以是提高光線亮度的 增光片、㈣提升出光均扯的擴似顧糊整出光方 13 20101141丄0_ 28556twf.doc/n 向的棱鏡片等。另外，本實施例中液晶面板620可以改換 成電濕潤（electorwetting )顯示器面板或是電泳式 (electophoretic )顯示器面板’亦即，背光模組2〇可以適 用於其他種類的顯示器面板。 在其他實施例中’為使背光模組2〇輕量化，框架4〇〇 也可以採用非金屬材質，也可以是塑膠材質等，例如可以 為白色的塑膠框架，以提高反射率。若在沒有反射片的情 ❹ 況下，白色塑膠框架的反射底壁與反射侧壁的表面愈光滑 愈好’較佳地’表面粗糙度小於等於〇 〇lmm會有良好的 反射率表現。關於表面粗糙度的定義，例如可採用是中心 平均粗糙度（Ra)的表示方法，此為業界一般習知的定義， 不再贅述。實際上，並非所有塑膠材質都具有高反射性質， 因此以塑膠材質作為框架400時可能需要搭配配置反射材 料以使背光模組20有更加的出光效果。 圖8為依照本發明之另一實施例的一種側面入光式背 光模組剖面示意圖。請參考圖8，在本實施例之背光模組 0 40中，框架480包括一非鏡反射殻體482以及一反射片 484。非鏡反射殼體482具有一底壁482a以及一側壁 482b，且反射片484貼附於底壁482a以及側壁482b上以 構成反射底壁480a以及反射侧壁480b。非鏡反射殼體482 例如是由不具反射性質的塑膠材料製作而成，所以本實施 例在非鏡反射殼體482内貼附反射片484以提供反射作用。 此外，本實施例中，反射底壁480a的法向量P與反射 側壁480b相交一夾角Θ。據此，原本自光源500水平射出 201011413 -------------^206-0811 28556twf.doc/n 或是原本小角度射出的光線可有效地被反射至非水平方向 的路控上而進-步被利用。如此一來，反射側壁4_的設 計即有助於提升背光模組40的輝度。當然，框架48〇的設 计僅為舉例說明之用，並非用以限定本發明。在其他實施 例中若選用具反射性質的塑膠材質作為框架，則可以不需 另外配置反射片484。 此外，圖9所繪示為依照本發明之一實施例的一種反 ❹ 射片上視圖。請參考圖9，為了使反射片484的貼附良率 提升’反射片484可具有多個孔洞486，其位於側壁482b 與底壁482a之連接處。反射片484貼附於側壁480b與底 壁480a時必須沿BB’方向彎折，因此BB，方向往往是應力 集中處。換言之’反射片484容易在此產生翹曲現象，而 影響背光模組20的良率。 因此，本實施例中，反射片484例如具有多個孔洞 486。當反射片484貼附於如圖8所繪示的非反射殼體482 中時，這些孔洞486例如是對應於底壁482a與侧壁482b ® 的連释處。藉由多個孔洞486的設置可以增加反射片484 的可撓性以避免反射片484因彎折之應力集中而造成翹 曲，甚至影響背光模組20的良率。 圖10為依照本發明之再一實施例的一種侧面入光式 背光模組的局部剖面圖。請參考圖1〇 ’反射片484可包括 第一子反射片484a以及第二子反射片484b。第一子反射 片484a貼附於底壁482a上以構成反射底壁480a’而第二 子反射片484b貼附於侧壁482b上以構成反射側壁48〇b。 15 201011413 J206-0811 28556twf.doc/n 藉由兩片子反射片484a及484b的配合，可解決單片反射 片484於貼附在彎折處而可能造成的扭曲、龜裂或破開等 情形，而使背光模組20有良好的光源利用率。 值得一提的是，使用非反射殼體482作為框架之主要 架構時，亦可將反射材料層塗佈於框架480的底壁482a 以及侧壁482b上以構成反射底壁480a以及反射侧壁 480b。此處的反射材料層之材質例如是選自具有高反射率Table 1. Θ angle (deg) output power (w) average luminance (nits) luminance enhancement (%) 0 0.521 390.79 χ +15deg 0.556 416.46 6.16 +20deg 0.564 422.52 7.51 +25deg 0.572 428.59 8 88 +30deg 0.573 429.89 9.09 +35deg 0.568 425.9 8.24 —20deg 0.56 419.17 6.77 —25deg 0.568 426.03 8.29 —30deg 0.574 430.38 9,19 —35deg 0.571 ——----- 427.91 -------- 8.67 201011413 wt*y/U5-C206-081l 28556twf.doc/n As can be seen from Table 1, the angle Θ is ±30. The light output effect of the backlight module 20 can have the best performance. In detail, the Yanjiao is ±30. At this time, the average luminance can rise to nearly 430 nits, and the percentage of luminance increase can be increased to more than 9%. Therefore, in order to achieve the optimum light-emitting efficiency of the backlight module 20, the angle Θ can be, for example, 30. 'But the invention is not limited thereto. When the size design or component arrangement relationship of the backlight module 2〇 is changed, the angle Θ of the optimum light-emitting efficiency may not be 30. . As can be seen from the above, the light emitted from the light source 5 can be effectively utilized by the design that the reflective side wall 400b is not perpendicular to the reflective bottom wall 400a. That is to say, the brightness of the backlight module 20 can be increased to effectively increase the brightness of the backlight module 20. Referring again to Fig. 4' in the present embodiment, the reflective side wall 4b is exemplified by a flat surface. However, in other embodiments, the reflective sidewall 4 may also be a multi-stage bevel or a traveling surface. 5A and 5B are cross-sectional views of a frame of two side-entry light-emitting modules in accordance with an embodiment of the present invention. Referring to FIG. 5A and FIG. 5A simultaneously, the reflective sidewalls 450b are formed, for example, by a plurality of planar bevels, and the angle θ between each of the planar bevels and the normal vector p of the reflective bottom wall 450a is not completely the same. FIG. 5A shows that the angle θ is gradually reduced outward from the junction of the reflective sidewall 45 (10) and the reflective bottom wall 450a, and FIG. 5A shows the angle Θ self-reflecting sidewall 450b and the reflective bottom wall 45〇. The joint of a gradually becomes larger outward. In detail, the length of each of the plane hypotenuses may be the same, different, or partially identical to the portion. 6A and 6B are cross-sectional views of a frame of an in-light backlight module in accordance with an embodiment of the present invention. 12 201011413 : 206-0811 28556 twf.doc/n. Referring to FIG. 6A and FIG. 6B simultaneously, in the embodiment, the reflective sidewall 460b is, for example, a curved surface, wherein the angle between the reflective sidewall 460b and the reflection bottom wall 460a normal vector P is from the reflective sidewall 460b and the reflective bottom wall. The junction of 460a gradually changes outward. As shown in Fig. 6A, the intersection angle of the self-reflecting side wall 460b and the reflective bottom wall 460a is gradually reduced outward. In contrast, FIG. 6B shows that the intersection angle Θ is gradually increased outward from the junction of the reflective sidewall 460b and the reflective bottom wall 460a. The curved side wall 460b of the curved surface has the same function as the reflective side wall 460b having a plurality of oblique sides as described above. For example, by the design that the reflective sidewalls 450b, 460b are not perpendicular to the reflective bottom walls 450a, 460a and are beveled or curved, the light parallel to the reflective bottom walls 450a, 460a can be reflected and obliquely emitted. Effective light. Accordingly, the design of the frame 450 and the frame 460 allows the light emitted by the light source to be effectively utilized, further achieving the effect of saving energy consumption. FIG. 7 is a schematic diagram of a liquid crystal display device to which the side light-integrating backlight module of the embodiment is applied. Referring to FIG. 7, in the embodiment, the backlight module 20 and the liquid crystal panel 620 are assembled, and the backlight module 2 is placed under the liquid crystal panel 620 to form a liquid crystal display device. Since the backlight module π can provide light of a large luminance to the liquid crystal panel 62, the liquid crystal display device 600 can have good display quality. Further, in order to allow the liquid crystal display device 6 〇 0 to have a better display quality, it may be disposed between the backlight module 2 〇 and the liquid crystal panel 62 :: an optical film _. The optical film _ can be a brightness-increasing film that enhances the brightness of the light, and (4) a film that enhances the light-extracting light and expands the light. 13 20101141丄0_ 28556twf.doc/n The prism sheet and the like. In addition, in this embodiment, the liquid crystal panel 620 can be changed to an electrifying display panel or an electrophoretic display panel. That is, the backlight module 2 can be applied to other types of display panels. In other embodiments, in order to reduce the weight of the backlight module 2, the frame 4〇〇 may be made of a non-metal material or a plastic material, for example, a white plastic frame to improve the reflectance. If there is no reflective sheet, the smoother the surface of the reflective bottom wall and the reflective side wall of the white plastic frame is better. Preferably, the surface roughness is less than or equal to 〇 〇 lmm, which has a good reflectance performance. Regarding the definition of the surface roughness, for example, a method of expressing the center average roughness (Ra) may be employed, which is a well-known definition in the industry and will not be described again. In fact, not all plastic materials have high reflective properties. Therefore, when the plastic material is used as the frame 400, it may be necessary to configure the reflective material to make the backlight module 20 have a more light-emitting effect. FIG. 8 is a cross-sectional view of a side-into-light backlight module in accordance with another embodiment of the present invention. Referring to FIG. 8, in the backlight module 0 40 of the embodiment, the frame 480 includes a non-mirror reflective housing 482 and a reflective sheet 484. The non-mirror reflective housing 482 has a bottom wall 482a and a side wall 482b, and the reflective sheet 484 is attached to the bottom wall 482a and the side wall 482b to form a reflective bottom wall 480a and a reflective sidewall 480b. The non-mirror reflective housing 482 is made of, for example, a plastic material that does not have reflective properties. Therefore, in this embodiment, a reflective sheet 484 is attached to the non-mirror reflective housing 482 to provide a reflection. In addition, in this embodiment, the normal vector P of the reflective bottom wall 480a intersects the reflective sidewall 480b by an angle Θ. Accordingly, the light originally emitted from the light source 500 horizontally 201011413 -------------^206-0811 28556twf.doc/n or the original small angle can be effectively reflected to the non-horizontal direction. The road control is advanced and the steps are utilized. In this way, the design of the reflective sidewall 4_ helps to increase the brightness of the backlight module 40. Of course, the design of the frame 48 is for illustrative purposes only and is not intended to limit the invention. In other embodiments, if a plastic material having a reflective property is selected as the frame, the reflection sheet 484 may not be additionally disposed. In addition, Figure 9 is a top view of an anti-projection film in accordance with an embodiment of the present invention. Referring to Figure 9, in order to improve the adhesion yield of the reflective sheet 484, the reflective sheet 484 can have a plurality of holes 486 at the junction of the side wall 482b and the bottom wall 482a. When the reflection sheet 484 is attached to the side wall 480b and the bottom wall 480a, it must be bent in the BB' direction, so BB tends to be in a stress concentration direction. In other words, the reflection sheet 484 is likely to cause warpage here, which affects the yield of the backlight module 20. Therefore, in the present embodiment, the reflection sheet 484 has, for example, a plurality of holes 486. When the reflective sheet 484 is attached to the non-reflective housing 482 as shown in FIG. 8, the holes 486 correspond, for example, to the end of the bottom wall 482a and the side wall 482b®. The flexibility of the reflective sheet 484 can be increased by the arrangement of the plurality of holes 486 to prevent the reflection sheet 484 from being warped due to stress concentration of the bending, and even affecting the yield of the backlight module 20. Figure 10 is a partial cross-sectional view showing a side-lit backlight module in accordance with still another embodiment of the present invention. Referring to FIG. 1A, the reflection sheet 484 may include a first sub-reflection sheet 484a and a second sub-reflection sheet 484b. The first sub-reflecting sheet 484a is attached to the bottom wall 482a to constitute the reflecting bottom wall 480a' and the second sub-reflecting sheet 484b is attached to the side wall 482b to constitute the reflecting side wall 48〇b. 15 201011413 J206-0811 28556twf.doc/n By the cooperation of the two sub-reflective sheets 484a and 484b, it is possible to solve the distortion, crack or breakage of the single-piece reflective sheet 484 which may be caused by being attached to the bent portion. The backlight module 20 has a good light source utilization rate. It should be noted that when the non-reflective housing 482 is used as the main structure of the frame, the reflective material layer may also be applied to the bottom wall 482a and the side wall 482b of the frame 480 to form the reflective bottom wall 480a and the reflective sidewall 480b. . The material of the reflective material layer here is, for example, selected from a high reflectivity
的高分子材料。如此一來，框架480即可提供適當的反射 作用以使光源利用率有效提升。 综上所述，在本發明之侧面入光式背光模組中，具有 一段或多段斜邊的反射侧壁或弧面的反射侧壁。因此，光 源所發出平行於反射底财向或小肢方向的糾可被反 射侧壁反射至適當的光徑上而有效被。如此，背光模 ΐί輝ί便能夠有效提升，更進而讓使用此背紐組的液 日曰顯不裝置具有良好的顯示效果。 ❹ — 發明已崎佳實關揭露如上，然其並非用以 2太路:Η ’任何所屬技術領域中具有通常知識者，在不 因此本㈣之料，範圍内當可作餅之更動與潤飾， 為準。< 保魏11當減社ΐ請專娜圍所界定者 【圖式簡單說明】 圖1 圖2 早詋明】 —種側面人光式背光模組的立體示意圖 為〉。圖1之剖線ΑΑ’所緣示的剖面圖。 16 201011413 J206-0811 28556twf.doc/n 圖3為依照本發明之一實施例的一種侧面入光式背光 模組立體示意圖。 圖4為沿圖3之剖線bb，所繪示的剖面圖。 圖5A及圖5B為依照本發明之一實施例的兩種侧面入 光式背光模組之框架剖面圖。 圖6A及圖6B為依照本發明之一實施例的又兩種侧面 入光式背光模組之框架的剖面圖。 圖7為應用本實施例之側面入光式背光模組的液晶顯 示裝置示意圖。 圖8為依照本發明之另一實施例的一種側面入光式背 光模組剖面示意圖。 圖9所繪示為依照本發明之一實施例的一種反射片上 視圖。 圖1〇為依照本發明之再一實施例的一種側面入光式 背光模組的局部剖面圖。 φ 【主要元件符號說明】 10、20、40 :背光模組 100、300:導光板 200、400、450、460、480 :框架 200a、420a、482a:底壁 200b、420b、482b :側壁 220 :發光二極體 230、510 :電路板 17 20101 1413j20_ 28556twf.doc/n 300a :入光面 300b :出光面 400a、450a、460a、480a :反射底壁 400b、450b、460b、480b :反射側壁 420 :非反射殼體 482 :非反射殼體 484 :反射片 484a:第一子反射片 484b:第二子反射片 486 :孔洞 500 :光源 510 :電路板 600 :液晶顯示裝置 620 :液晶面板 640 :光學膜片 Θ :爽角 〇 L、Μ、N、Ο :光線行進路線 Ρ:反射底壁的法向量 18Polymer material. In this way, the frame 480 can provide an appropriate reflection to effectively increase the utilization of the light source. In summary, in the side-lit backlight module of the present invention, there are one or more oblique beveled reflective sidewalls or curved reflective sidewalls. Therefore, the correction caused by the light source parallel to the reflection bottom or the small limb direction is effectively reflected by the reflection side wall to the appropriate optical path. In this way, the backlight module ΐ ί ί ί can effectively improve, and further, the liquid sputum display device using the back button group has a good display effect. ❹ 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明, whichever is the case. < Bao Wei 11 when the reduction of the community, please define the definition of the Nana [Simplified description of the figure] Figure 1 Figure 2 early description] - a stereoscopic schematic of the side of the human light backlight module is >. Fig. 1 is a cross-sectional view taken along the line ΑΑ'. 16 201011413 J206-0811 28556twf.doc/n FIG. 3 is a perspective view of a side-lit backlight module according to an embodiment of the invention. Figure 4 is a cross-sectional view taken along line bb of Figure 3. 5A and 5B are cross-sectional views of a frame of two side-input backlight modules in accordance with an embodiment of the present invention. 6A and 6B are cross-sectional views showing a frame of two other side-in-light backlight modules in accordance with an embodiment of the present invention. Fig. 7 is a schematic view showing a liquid crystal display device to which the side light-integrating backlight module of the embodiment is applied. FIG. 8 is a cross-sectional view of a side-into-light backlight module in accordance with another embodiment of the present invention. Figure 9 is a top view of a reflective sheet in accordance with an embodiment of the present invention. 1 is a partial cross-sectional view of a side-lit backlight module in accordance with still another embodiment of the present invention. Φ [Description of main component symbols] 10, 20, 40: backlight module 100, 300: light guide plates 200, 400, 450, 460, 480: frames 200a, 420a, 482a: bottom walls 200b, 420b, 482b: side walls 220: Light-emitting diodes 230, 510: circuit board 17 20101 1413j20_ 28556twf.doc/n 300a: light-incident surface 300b: light-emitting surface 400a, 450a, 460a, 480a: reflective bottom wall 400b, 450b, 460b, 480b: reflective sidewall 420: Non-reflective housing 482: non-reflective housing 484: reflective sheet 484a: first sub-reflecting sheet 484b: second sub-reflecting sheet 486: hole 500: light source 510: circuit board 600: liquid crystal display device 620: liquid crystal panel 640: optical Diaphragm Θ: cool angle 〇 L, Μ, N, Ο: light travel route Ρ: reflection of the normal vector of the bottom wall 18