201011412 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側光式背光模組。 【先前技術】 在液晶顯示裝置之背光模組中，光源發出之光線經由 導光板及反射片之導引後進入光學膜片組，經聚光增亮及 ❹ 擴散’形成背光模組之輸出光源。為使液晶顯示裝置具有 高輝度及亮度均勻，導光板與光學膜片組需搭配設計才能 達成最佳的效用。 請參照圖1A所示，一種習知之液晶顯示裝置1包含 一液晶顯示面板1〇以及一側光式背光模組丨丨。侧光式背 光模組11係與液晶顯示面板10對應設置。側光式背光模 組11包含一導光板111、一光源112及一反射片113。導 _ 光板111上方更設置由一增亮膜115及一擴散片116所組 成的光學膜片組，其中增亮膜115係為一具聚光作用的逆 稜鏡片結構。導光板1 2 3具有一入光面Ilia及一出光面 111b，為配合逆稜鏡結構作為光向上出射手段出光面 1 b係為複數個相互平行之v型刻槽（V-CUT )，並且在 2 導光板111之底面網版印刷複數個網點丨丨7。 3 光源112鄰設於入光面11 ia，且光源112外圍周邊設 置一反射罩Π8。此類側光式背光模組其反射月113通常 為一銀材質或者類似之高光澤度金屬材質所構成之反射 201011412 表面’並設置於出光面lllb相對之一側。當光源U2發出 之光線經由導光板111引導後’一部分經由出光面111b 直接導出，一部分則由網點117破壞全反射之光線，形成 散射後再經由出光面111b導出，另一部份往下逸出（穿透 出）導光板U1的光線則被反射片113加以向上反射回到 導光板111後，再向上經由出光面lUb導出。 然而，因出光面111b係為複數個相互平行之V型刻 槽，而反射片113為銀等高光澤度之金屬表面材質、導致 ❹光線反射時不易形成散射現象而是以鏡面反射為主，故造 成在鄰近入光面Ilia的附近會有亮紋（亮暗紋）的情形產 〇 生（請參閱圖1B所示），距離入光面llla較遠的區域則 反射片113因光線入射角大而逐漸轉變為主要用以在導光 板111内部傳導光線行進用，故較遠的區域主要以導光板 111的網點進行光線的反射而出射的行為為主，因網點材 質本身有良好的散射性，故不會造成光線鏡面反射的亮暗 ❹紋現象。雖然背光模組11可藉由在擴散片116對應亮紋發 生區域印刷一塗層（coating)，使此區域霧度值增加、或 者在反射罩118局部印刷一塗層來改善增加光線的散射， 但實際效果仍非常有限，因而仍無法避免亮紋的缺失。 因此，如何提供一種液晶顯示裝置及其側先式背光模 組’以改善導光板之出光面有亮暗紋的情形而使液晶顯 不裝置具有高輝度及亮度均句之顯示品質，已成為重要課 題之。 201011412 【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 裝置及其側光式背光模組，藉由反射片之光澤度差異，改 善導光板之出光面有亮暗紋的情形，使背光模組輸出高輝 度及亮度均勻的光線，提升液晶顯示裝置之顯示品質。 緣是，為達上述目的，依據本發明之一種側光式背光 模組包含一導光板、一光源、一第一反射片以及一第二反 射片。導光板係具有一出光面及一入光面。光源係鄰設於 Ο 入光面。第一反射片係設置於出光面相對之一側，並鄰近 爲 Λ 〇 入光面。第二反射片係設置於出光面相對之一側，並與第 一反射片接合，第二反射片的光澤度大於第一反射片的光 澤度。 為達上述目的，依據本發明之另一種側光式背光模組 包含一導光板、一光源以及一反射片。導光板係具有一出 光面及一入光面。光源係鄰設於入光面。反射片係設置於 出光面相對之一側，並具有一第一反射區及一第二反射 區，第一反射區鄰近入光面，且第二反射區的光澤度大於 ◎ 第一反射區的光澤度。 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側光式背光模組。侧光式背光模組 係與液晶顯示面板對應設置，側光式背光模組包含一導光 板、一光源、一第一反射片及一第二反射片。導光板具有 一出光面及一入光面。光源鄰設於入光面。第一反射片設 置於出光面相對之一侧，並鄰近入光面。第二反射片設置 8 201011412 於出光面相對之一侧，並與第一反射片接合，第二反射片 的光澤度大於第一反射片的光澤度。 為達上述目的’依據本發明之另一種液晶顯示裝置包 含一液晶顯示面板以及—侧光式背光模組。侧光式背光模 組係與液晶顯示面板對應設置，側光式背光模組包含一導 光板、光源及一反射片。導光板具有一出光面及一入光 面。光源鄰設於入光面。反射片設置於出光面相對之一 侧，並具有一第一反射區及一第二反射區，第一反射區鄰 ❹ 近入光面’且第二反射區的光澤度大於第一反射區的光澤 度0 承上所述’因依據本發明之一種液晶顯示裝置及其側 光式背光模組係藉由在導光板相對於出光面之一側設置 光澤度不相同之反射片或反射區，鄰近光源的光澤度較 低’遠離光源的光澤度較高，使光源發出之光線能夠均勻 導出。與習知技術相較，本發明能夠避免導光板發生亮暗 紋的情形，使側光式背光模組輸出高輝度及亮度均勻之光 線，提升液晶顯示裝置之顯示品質。 【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側光式背光模組，其中相同的元件將 以相同的參照符號加以說明。 請參照圖2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20以及一側光式背光模組 201011412 21。侧光式背光模組21係與液晶顯示面板20對應設置。 侧光式背光模組21包含一導光板211、一光源212、一第 一反射片213及一第二反射片214。導光板211係為一楔 形結構或平板結構，並具有一入光面211a及一出光面 211b，出光面211b係具有相互平行之複數個V型刻槽 (V-CUT)，並可與導光板211 -體成型製成。 另外，導光板211更具有複數個網點217分佈於出光 面211b相對之一侧，且在導光板211上方更設置由一增亮 ❹ 膜215及一擴散片216所組成的光學膜片組，其中增亮膜 215係為一逆稜鏡片結構。光源212係可為一冷陰極螢光 燈管（CCFL)或由發光二極體（LED)構成線光源（light bar)，並鄰設於入光面211a。且光源212外圍係設置一反 射罩218,使光線能更集中導向入光面211a。第一反射片 213設置於出光面211b相對之一側，並鄰近入光面211a。 第二反射片214設置於出光面211b相對之一側，並接合 於第一反射片213之一側端’使第一反射片213與第二反 ❹ 射片214呈平行設置。第二反射片214的光澤度大於第一 反射片213的光澤度。其中’第一反射片213係可為一白 反射片，第二反射片214則為一銀反射片。另外，亦可藉 由在一大片的第二反射片214的對應第一反射片213的一 特定區域上塗佈白色漆料製成第一反射片213，或者直接 以白色塑膠材料製成獨立一第一反射片213、再與第二反 射片214接合；同樣亦可藉由在一大片的第一反射片213 的對應第二反射月214的一特定區域上塗佈銀色漆料製成 201011412 第二反射片214，或者直接以銀或類似光澤度的金屬村料 製成獨立一第二反射片214、再與第一反射片213接合。 另外，第一反射片213與第二反射片214之接合處L1係 可呈不規則狀’可使反射片整體反射的光線不致有因不同 反射性質反射片交界過度明顯而產生的斷層的、落差過大 的光學表現。 請參照圖3所示’自光源212發出之光線以反射罩218 集中導向後，由入光面211a進入。當光線E入射該等反 φ 射片213、214時’由於導光板211之形狀設計’加上第 一反射片213及第二反射片214之光澤度並不相同’光線 以相同角度入射第一反射片213,及第二反射片214會有不 同的反射表現。於鄰近光源212的區域設置第一反射片 213，藉由白反射片等光澤度較低的設計，將光線以較偏 向散射的形式反射，並脫離出導光板211而改善此區域原 本在高光澤度的銀反射片反射下所產生的亮紋現象° 第一反射片213與第二反射片214的設置關係可有不 ❹ 同的變化態樣。請參照圖4所示’液晶顯示裝置2a及側光 式背光模組21 a之主要構件及其連結關係與功能係與上述 實施例之液晶顯示裝置2及侧光式背光模組21相同’於 此不再贅述。本實施態樣不同之處在於：第一反射片213a 係以貼附或塗佈方式接合於一面積較大的第二反射片 214a上，反之亦可、即第二反射片214a以貼附或塗佈方 式接合於一面積較大的第一反射片213a上（未繪示出）， 且第一反射片213a與第二反射片214a之交界處L2係可 201011412 呈不規則狀。201011412 IX. Description of the Invention: [Technical Field] The present invention relates to a display device and a backlight module thereof, and more particularly to a liquid crystal display device and an edge-lit backlight module thereof. [Prior Art] In the backlight module of the liquid crystal display device, the light emitted by the light source is guided by the light guide plate and the reflective sheet, and then enters the optical film group, and is concentrated and brightened and diffused to form an output light source of the backlight module. . In order to make the liquid crystal display device have high brightness and uniform brightness, the light guide plate and the optical film group need to be matched to achieve the best effect. Referring to FIG. 1A, a conventional liquid crystal display device 1 includes a liquid crystal display panel 1 and a side light backlight module 丨丨. The side light type backlight module 11 is provided corresponding to the liquid crystal display panel 10. The edge-lit backlight module 11 includes a light guide plate 111, a light source 112, and a reflection sheet 113. An optical film group consisting of a brightness enhancement film 115 and a diffusion film 116 is disposed above the light guide plate 111, wherein the brightness enhancement film 115 is a light-receiving reverse film structure. The light guide plate 1 2 3 has a light incident surface Ilia and a light exit surface 111b, and the light exit surface 1b is a plurality of mutually parallel v-shaped grooves (V-CUT) for supporting the reverse 稜鏡 structure as the light upward exit means, and A plurality of dots 丨丨7 are screen-printed on the bottom surface of the 2 light guide plate 111. 3 The light source 112 is disposed adjacent to the light incident surface 11 ia, and a reflective cover 8 is disposed around the periphery of the light source 112. The reflective moon 113 of such an edge-lit backlight module is usually a silver material or a high-gloss metal material similar to the reflection 201011412 surface and disposed on one side of the light-emitting surface 111b. When the light emitted by the light source U2 is guided through the light guide plate 111, a part is directly led out through the light exit surface 111b, and a part of the light is destroyed by the halftone point 117, and then scattered, and then exited through the light exit surface 111b, and the other part escapes downward. The light that has passed through the light guide plate U1 is reflected upward by the reflection sheet 113 back to the light guide plate 111, and then is led upward through the light exit surface lUb. However, since the light-emitting surface 111b is a plurality of mutually parallel V-shaped grooves, and the reflection sheet 113 is a high-gloss metal surface material such as silver, it is difficult to form a scattering phenomenon when the light is reflected, but is mainly specular reflection. Therefore, there is a case where a bright grain (light and dark grain) is generated in the vicinity of the light incident surface Ilia (see FIG. 1B), and a region farther from the light entrance surface 111a is a reflection angle of the reflection sheet 113 due to light. Large and gradually changed to mainly for conducting light traveling inside the light guide plate 111. Therefore, the farther area is mainly caused by the reflection of light from the dot of the light guide plate 111, and the mesh material itself has good scattering property. Therefore, it will not cause the bright and dark crepe of the specular reflection of light. The backlight module 11 can improve the scattering of light by printing a coating on the corresponding light-producing area of the diffusion sheet 116, increasing the haze value of the area, or partially printing a coating on the reflective cover 118. However, the actual effect is still very limited, so the lack of bright lines cannot be avoided. Therefore, how to provide a liquid crystal display device and a side-precision backlight module thereof to improve the light-darkness of the light-emitting surface of the light guide plate, so that the liquid crystal display device has high brightness and brightness display quality has become an important The subject. 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 an edge-lit backlight module thereof, which can improve the bright and dark surface of the light-emitting surface of the light guide plate by the difference in gloss of the reflective sheet. The backlight module outputs light with high luminance and uniform brightness to improve the display quality of the liquid crystal display device. For the above purpose, an edge-lit backlight module according to the present invention comprises a light guide plate, a light source, a first reflection sheet and a second reflection sheet. The light guide plate has a light emitting surface and a light incident surface. The light source is adjacent to the illuminating surface. The first reflective sheet is disposed on a side opposite to the light-emitting surface and adjacent to the light-incident surface. The second reflective sheet is disposed on one side of the light-emitting surface and joined to the first reflective sheet, and the second reflective sheet has a gloss greater than that of the first reflective sheet. To achieve the above object, another edge-lit backlight module according to the present invention comprises a light guide plate, a light source and a reflection sheet. The light guide plate has a light emitting surface and a light incident surface. The light source is adjacent to the light incident surface. The reflective sheet is disposed on a side opposite to the light emitting surface, and has a first reflective area and a second reflective area. The first reflective area is adjacent to the light incident surface, and the second reflective area has a gloss greater than that of the first reflective area. Gloss. 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 side light type backlight module. The edge-lit backlight module is disposed corresponding to the liquid crystal display panel, and the edge-lit backlight module comprises a light guide plate, a light source, a first reflective sheet and a second reflective sheet. The light guide plate has a light emitting surface and a light incident surface. The light source is adjacent to the light incident surface. The first reflection sheet is disposed on one side opposite to the light-emitting surface and adjacent to the light-incident surface. The second reflective sheet is disposed on the opposite side of the light-emitting surface and is joined to the first reflective sheet. The second reflective sheet has a gloss greater than that of the first reflective sheet. In order to achieve the above object, another liquid crystal display device according to the present invention comprises a liquid crystal display panel and an edge-lit backlight module. The edge-lit backlight module is disposed corresponding to the liquid crystal display panel, and the edge-lit backlight module comprises a light guide plate, a light source and a reflective sheet. The light guide plate has a light emitting surface and a light incident surface. The light source is adjacent to the light incident surface. The reflective sheet is disposed on a side opposite to the light-emitting surface, and has a first reflective area and a second reflective area. The first reflective area is adjacent to the light-incident surface and the second reflective area has a greater gloss than the first reflective area. Glossy 0 According to the present invention, a liquid crystal display device and an edge-lit backlight module thereof according to the present invention are provided with a reflective sheet or a reflective region having different gloss levels on one side of the light guide plate with respect to the light-emitting surface. The gloss of the adjacent light source is lower. The gloss away from the light source is higher, so that the light emitted by the light source can be evenly derived. Compared with the prior art, the present invention can avoid the occurrence of bright and dark lines on the light guide plate, and enable the edge-lit backlight module to output light with high luminance and uniform brightness to improve the display quality of the liquid crystal display device. [Embodiment] Hereinafter, a liquid crystal display device and an edge-lit backlight module thereof 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. 2, a liquid crystal display device 2 according to a preferred embodiment of the present invention includes a liquid crystal display panel 20 and a side light backlight module 20101141221. The edge-lit backlight module 21 is provided corresponding to the liquid crystal display panel 20. The edge-lit backlight module 21 includes a light guide plate 211, a light source 212, a first reflective sheet 213, and a second reflective sheet 214. The light guide plate 211 is a wedge-shaped structure or a flat plate structure, and has a light-incident surface 211a and a light-emitting surface 211b. The light-emitting surface 211b has a plurality of V-shaped grooves (V-CUT) parallel to each other, and can be combined with the light guide plate. 211 - Body molded. In addition, the light guide plate 211 further has a plurality of dots 217 distributed on one side of the light-emitting surface 211b, and an optical film group consisting of a brightening film 215 and a diffusion sheet 216 is disposed above the light guide plate 211, wherein The brightness enhancement film 215 is a reverse gusset structure. The light source 212 can be a cold cathode fluorescent lamp (CCFL) or a light bar composed of a light emitting diode (LED) and disposed adjacent to the light incident surface 211a. And a reflector 218 is disposed on the periphery of the light source 212 to enable the light to be more concentratedly guided to the light surface 211a. The first reflection sheet 213 is disposed on one side of the light-emitting surface 211b and adjacent to the light-incident surface 211a. The second reflection sheet 214 is disposed on one side of the light-emitting surface 211b and joined to one side end of the first reflection sheet 213 such that the first reflection sheet 213 and the second reflection sheet 214 are disposed in parallel. The gloss of the second reflection sheet 214 is greater than the gloss of the first reflection sheet 213. The first reflective sheet 213 can be a white reflective sheet, and the second reflective sheet 214 is a silver reflective sheet. In addition, the first reflective sheet 213 may also be formed by coating a white paint on a specific area of the corresponding first reflective sheet 213 of the second piece of the second reflective sheet 214, or directly made of a white plastic material. The first reflective sheet 213 is further joined to the second reflective sheet 214; the same can also be made by applying a silver paint on a specific area of the corresponding second reflective month 214 of the first piece of the first reflective sheet 213. The two reflection sheets 214 are directly formed into a separate second reflection sheet 214 by silver or a similar gloss metal material, and then joined to the first reflection sheet 213. In addition, the joint L1 of the first reflection sheet 213 and the second reflection sheet 214 may be irregularly shaped. The light reflected by the reflection sheet as a whole may not have a fault or a drop caused by an excessively distinct boundary between the reflection sheets of different reflection properties. Excessive optical performance. Referring to FIG. 3, the light emitted from the light source 212 is concentrated and guided by the reflector 218, and then enters by the light incident surface 211a. When the light E is incident on the anti-φ pieces 213, 214, 'the shape of the light guide plate 211' is added, and the gloss of the first reflection piece 213 and the second reflection piece 214 is not the same. 'The light is incident at the same angle first. The reflection sheet 213 and the second reflection sheet 214 have different reflection expressions. The first reflective sheet 213 is disposed in a region adjacent to the light source 212, and the light is reflected in a more deflected form by a design with a lower glossiness such as a white reflective sheet, and is separated from the light guide plate 211 to improve the high gloss in the area. The phenomenon of the bright streaks generated by the reflection of the silver reflection sheet. The arrangement relationship between the first reflection sheet 213 and the second reflection sheet 214 may have different variations. Referring to FIG. 4, the main components of the liquid crystal display device 2a and the edge-lit backlight module 21a and their connection relationships and functions are the same as those of the liquid crystal display device 2 and the edge-light backlight module 21 of the above embodiment. This will not be repeated here. The embodiment is different in that the first reflective sheet 213a is attached to a second reflective sheet 214a having a larger area by attachment or coating, or vice versa, that is, the second reflective sheet 214a is attached or The coating method is bonded to a larger first reflective sheet 213a (not shown), and the interface L2 of the first reflective sheet 213a and the second reflective sheet 214a may be irregular in shape.
〇 請參照圖5所示，本發明較佳實施例之另一種反射片 413係藉由單一反射片，反射片413具有一第一反射區413a 及一第二反射區413b，第一反射區413a與第二反射區413b 之交界處L3係可呈不規則狀。反射片413可整體為銀或 類似光澤度金屬或合金材質製成，或將銀或類似光澤度金 屬或合金形成於一其他材質的基板上而製成。其中，第一 反射區413a係鄰近導光板的入光面，並經過表面加工處 理’例如以網版印刷複數個網點或進行例如一磨、刮等粗 糙處理，使第二反射區413b的光澤度G2大於第一反射區 413a的光澤度G1 ’同樣可改善導光板產生亮暗紋的情形。 綜上所述，因依據本發明之一種液晶顯示裝置及其侧 光式背光模組係藉由在導光板相對於出光面之一側設置 光澤度不相同之反射片戒反射區，鄰近光源的光澤度較 低，遠離光源的光澤度較高，整合性的結構設計，平衡光 強度及光澤度，使光源發出之光線能夠均勻導出。與習知As shown in FIG. 5, another reflective sheet 413 of the preferred embodiment of the present invention is a single reflective sheet. The reflective sheet 413 has a first reflective area 413a and a second reflective area 413b. The first reflective area 413a The L3 line at the boundary with the second reflection area 413b may be irregular. The reflection sheet 413 may be entirely made of silver or a similar gloss metal or alloy material, or may be formed by forming silver or a similar gloss metal or alloy on a substrate of another material. Wherein, the first reflective area 413a is adjacent to the light incident surface of the light guide plate, and is subjected to surface processing, for example, by screen printing a plurality of dots or performing rough processing such as grinding or scraping to make the gloss of the second reflective area 413b. G2 greater than the gloss G1' of the first reflective region 413a can also improve the situation in which the light guide plate produces bright and dark stripes. In summary, a liquid crystal display device and an edge-lit backlight module thereof according to the present invention are disposed adjacent to a light source by providing a reflective sheet or a reflective region having a different gloss on the side of the light guide plate with respect to the light-emitting surface. The gloss is low, the gloss away from the light source is high, and the integrated structural design balances the light intensity and gloss, so that the light emitted by the light source can be evenly derived. And conventional knowledge
技術相較，本發明能夠避免導光板發生亮暗紋的情形，使 側光式方光模組輸出南輝度及亮度均勻之光線提升液晶 顯示裝置之顯示品質。 以上所述僅為舉例性，而非為限制性 本發明之精神與_，而對其進行之等峰改或^脱均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 12 201011412 圖1A為一種習知之液晶顯示裝置及其側光式背光模 組的不意圖， 圖1Β為圖1Α之反射片導引光線的示意圖； 圖2為依據本發明較佳實施例之一種液晶顯示裝置及 其側光式背光模組的示意圖； 圖3為圖2之反射片導引光線的示意圖； 圖4為依據本發明較佳實施例之反射片設置關係具有 不同變化態樣的示意圖；以及 圖5為依據本發明較佳實施例之另一種反射片的示意 圖。 【主要元件符號說明】 I、 2、2a :液晶顯示裝置 10、20 :液晶顯示面板 II、 21、21a :側光式背光模組 III、 211 :導光板 llla、 211a :入光面Compared with the technology, the present invention can avoid the occurrence of bright and dark lines on the light guide plate, and enable the side light type square light module to output the brightness of the south brightness and the uniform brightness to improve the display quality of the liquid crystal display device. The above description is only intended to be illustrative, and not to limit the spirit and scope of the invention, and the equivalents thereof are included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a schematic view of a conventional liquid crystal display device and its edge-lit backlight module, FIG. 1A is a schematic view of the light guiding light of the reflecting sheet of FIG. 1; FIG. 2 is a schematic view of the light guiding device according to the present invention; 3 is a schematic view of a liquid crystal display device and an edge-lit backlight module thereof; FIG. 3 is a schematic view of the light guiding device of FIG. 2; FIG. 4 is a view showing different arrangement of reflective sheets according to a preferred embodiment of the present invention; A schematic diagram of a variation; and Figure 5 is a schematic illustration of another reflective sheet in accordance with a preferred embodiment of the present invention. [Description of main component symbols] I, 2, 2a: Liquid crystal display device 10, 20: Liquid crystal display panel II, 21, 21a: edge-lit backlight module III, 211: light guide plate llla, 211a: light-incident surface
lllb、 211b :出光面 112、 212 :光源 113、 413 :反射片 115、 215 :增亮膜 116、 216 :擴散片 117、 217 :網點 118、 218 :反射罩 13 201011412 213、 213a :第一反射片 214、 214a :第二反射片 413a :第一反射區 413b :第二反射區 E :光線L11b, 211b: light-emitting surfaces 112, 212: light sources 113, 413: reflection sheets 115, 215: brightness enhancement films 116, 216: diffusion sheets 117, 217: dots 118, 218: reflectors 13 201011412 213, 213a: first reflection Sheets 214, 214a: second reflection sheet 413a: first reflection area 413b: second reflection area E: light
Gl、G2 :光澤度 L1 :接合處 L2、L3 :交界處Gl, G2: Gloss L1: Joint L2, L3: Junction