200929321 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、背光模組及平面光源， 特別關於一種液晶顯示裝置、背光模組及平面光源。 【先前技術】 在液晶顯示裝置之背光模組中，平面光源因具有無汞 且組裝工時短之優點，已成為次世代光源之新趨勢。 請參照圖1A所示，一種習知之平面光源10係由一第 一基板11以及一第二基板12對向封合而成。第一基板11 具有一第一表面11a及一第二表面lib，第二基板12與第 二表面lib對應設置，第一表面11a係作為平面光源10 的出光面。第一基板11及第二基板12皆為玻璃材質構 成，並藉由複數個間隔件14之設置以支撐第一基板11及 第二基板12,該等間隔件14設置於第二基板12並頂抵第 一基板11，以維持第一基板11與第二基板12之間的間 距。第一基板11及第二基板12的邊緣以一封合結構15， 封合結構15例如為玻璃條並藉由玻璃燒結製程，使第一 基板11、第二基板12及封合結構15形成一密閉空間。此 外，第二基板12下方具有一外部電極16及一反射片17 ; 外部電極16係放電激發平面光源10内的氣體，使其再激 發平面光源10内壁的螢光物質放光。反射片17用以反射 平面光源10發出的光線及保護外部電極16。 請參照圖1B所示，當平面光源10組裝完成後，需通 200929321 過一耐衝擊試驗以確認產品品質。然而，由於第一表面ua $作為出光面無法s置保護結構’平面光源的其他部 分均具有保護結構，例如框體及背板（圖未顯示）。當平 面光，10由-z轴向往+z轴向落下，進行耐衝擊試驗時， 由於第基板Π並不具有任何保護結構且其材質為玻璃 材質，故落下時的慣性作用將使第-基板n瞬間產生變 形而破裂，造成平面光源10的損壞。 0 — 口此如何提供一種液晶顯示裝置、背光模組及平面 光源=改善出光面的結構強度，使平面光源能夠通過财衝 擊的°式驗’提两產品抗衝擊的效能，已成為重要課題之-。 【發明内容】 有，於上述課題，本發明之目的為提供一種液晶顯示 裝置、背光模組及平面光源，藉由保護層之設置使平面光 源結構強度提高而具備抗衝擊的效能。 〇 緣是，為達上述目的，依據本發明之一種平面光源包 含一第一基板、一第二基板以及至少一保護層。第一基板 ，係具有一第一表面及一第二表面。第二基板係與第二表面 對應設置，並具有複數個間隔件設置於第一基板與第二基 板之間。保護層係設置於第一表面。 為達上述目的’依據本發明之一種背光模組包含—擴 散板以及一平面光源。平面光源係鄰設於擴散板，平面光 源包含一第一基板、一第二基板及至少一保護層。第一基 板具有一第一表面及一第二表面，第二基板與第二表面對 200929321 應設置，並具有複數個間隔件設置於第一基板與第二基板 之間，保護層設置於第一表面。 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背光模組。背光模組係與液晶顯示 面板對應設置，並具有一擴散板及一平面光源鄰設於擴散 板。平面光源包含一第一基板、一第二基板及至少一保護 層。第一基板具有一第一表面及一第二表面，第二基板與 第二表面對應設置，並具有複數個間隔件設置於第一基板 ® 與第二基板之間，保護層設置於第一表面。 承上所述，因依據本發明之一種液晶顯示裝置、背光 模組及平面光源係藉由在平面光源的出光面上設置具有 耐衝擊性質之可透光保護層。與習知技術相較，本發明能 夠提高平面光源的結構強度，避免平面光源因外力衝擊而 有所損壞，提升抗衝擊的耐受度。 0 【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、背光模組及平面光源，其中相同的元件 r 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平面光源 21包含一第一基板211、一第二基板212及至少一保護層 213。第一基板211具有一第一表面211a及一第二表面 211b，第二基板212與第二表面211b對應設置，第一表面 211a係作為平面光源21的出光面。第一基板211及第二 7 200929321 基板212皆為玻璃材質構成，並具有複數個間隔件214設 置於第一基板211及第二基板212之間，藉以支#第一基 板211及第二基板212,並維持第一基板η與第二基板12 之間的間距。另外，第一基板211及第二基板212的邊緣 更具有一封合結構215 ’第一基板211、第二基板212及 封合結構215共同形成一密閉空間。 ❹ Ο 保護層213係設置於第一表面211a，且為具有透光性 質之單層或多層結構。此外，保護層213更進一步具有其 他性質以提升平面光源21的功能性，例如但不限於耐衝 擊、抗糸外線、光擴散及/或光致變色性質。另外，第二基 板2相對於第一基板211的另一侧則具有一外部電極 ^6及一反射元件217。反射元件217係例如但不限於為 、，金屬板，、—金屬片體或-金屬膜層，並用以反射平面 光源21卷出的光線及保護外部電極216。保護層213可為 般市p的光學膜片的保護膠膜或光學玻璃 尸、[^ 光學膜層，例如擴散膜或微透鏡（microlens) 等^凋i平面光源21發出光線的品質。 田平面光源21組裝完成進行耐衝擊試驗 面光源21在坌主二011 』出仏十 犯之_^—置保護層213,藉由保護層 而吏基板211不致因高速落下的衝擊， .°產生變形甚至破裂的情況。另外 因具有透光特性之單層或多層之複合材料所構m 響光源射出之。暂τ m 所稱成在不影 請來昭圖質下’&雨平面光源21之結構強度。 3所不’本發明較佳實施例之一種背光模組 200929321 20包含一擴散板22以及一平面光源21。擴散板22上更 可配置一擴散片23及一微透鏡24所組成之光學組，進一 步加強光學特性。其中，平面光源21已於前述實施例詳 予說明，故不再贅述。 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30以及一背光模組20,液晶顯示面板30與背光 模組20對應設置。其中，背光模組20已於前述實施例詳 予說明，故不再贅述。具有強化結構的平面光源21之液 ® 晶顯示裝置2及背光模組20，同樣具有抗衝擊的效能。 綜上所述，因依據本發明之一種液晶顯示裝置、背光 模組及平面光源係藉由在平面光源的出光面上設置具有 对衝擊性質之可透光保護層。與習知技術相較，本發明能 夠提高平面光源的結構強度，避免平面光源因外力衝擊而 有所損壞，提升抗衝擊的耐受度。 以上所述僅為舉例性，而非為限制性者。任何未脫離 0 本發明之精神與範脅，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 9 【圖式簡單說明】 圖1A為一種習知之平面光源的示意圖； 圖1B為一種習知之平面光源之衝擊測試的示意圖； 圖2為依據本發明較佳實施例之一種平面光源及衝 擊測試的示意圖；以及 圖3為依據本發明較佳實施例之一種液晶顯示裝置 9 200929321 及背光模組的示意圖。 【主要元件符號說明】 10、 21 :平面光源 11、 211 :第一基板 11a、211a:第·一 表面 lib、211b :第二表面 12、 212 :第二基板 ® 14、214 :間隔件 15、 215 :封合結構 16、 216 :外部電極 17 :反射片 2 :液晶顯示裝置 20 :背光模組 213 :保護層 & 217 :反射元件 22 :擴散板 ^ 23:擴散片 24 :微透鏡 3 0 .液晶顯不面板 +Z、-Z :轴向200929321 IX. Description of the Invention: [Technical Field] The present invention relates to a display device, a backlight module and a planar light source, and more particularly to a liquid crystal display device, a backlight module and a planar light source. [Prior Art] In the backlight module of the liquid crystal display device, the planar light source has become a new trend of the next generation light source because of its mercury-free and short assembly time. Referring to FIG. 1A, a conventional planar light source 10 is formed by opposing a first substrate 11 and a second substrate 12. The first substrate 11 has a first surface 11a and a second surface lib. The second substrate 12 is disposed corresponding to the second surface lib, and the first surface 11a serves as a light-emitting surface of the planar light source 10. The first substrate 11 and the second substrate 12 are all made of glass material, and are supported by the plurality of spacers 14 to support the first substrate 11 and the second substrate 12. The spacers 14 are disposed on the second substrate 12 and topped. The first substrate 11 is abutted to maintain the spacing between the first substrate 11 and the second substrate 12. The first substrate 11 and the second substrate 12 are formed by a bonding structure 15 , and the sealing structure 15 is, for example, a glass strip, and the first substrate 11 , the second substrate 12 , and the sealing structure 15 are formed by a glass sintering process. hermetic space. In addition, an external electrode 16 and a reflection sheet 17 are disposed under the second substrate 12. The external electrode 16 discharges the gas in the planar light source 10 to re-energize the phosphor on the inner wall of the planar light source 10. The reflection sheet 17 is for reflecting the light emitted from the planar light source 10 and protecting the external electrode 16. Referring to FIG. 1B, when the planar light source 10 is assembled, an impact test is required to confirm the product quality. However, since the first surface ua $ can not be placed as a light-emitting surface, the other portions of the planar light source have a protective structure, such as a frame and a back plate (not shown). When the plane light falls from the -z axis to the +z axis, when the impact test is performed, since the substrate Π does not have any protective structure and the material is made of glass, the inertia effect when falling will make the first - The substrate n is deformed and ruptured instantaneously, causing damage to the planar light source 10. 0 — How to provide a liquid crystal display device, backlight module and planar light source=Improve the structural strength of the light-emitting surface, so that the planar light source can pass the impact test of the financial impact to improve the impact resistance of the two products, which has become an important issue. -. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a liquid crystal display device, a backlight module, and a planar light source, which are provided with an impact resistance by improving the strength of a planar light source by providing a protective layer. In order to achieve the above object, a planar light source according to the present invention comprises a first substrate, a second substrate and at least one protective layer. The first substrate has a first surface and a second surface. The second substrate is disposed corresponding to the second surface, and has a plurality of spacers disposed between the first substrate and the second substrate. The protective layer is disposed on the first surface. To achieve the above object, a backlight module according to the present invention comprises a diffusion plate and a planar light source. The planar light source is disposed adjacent to the diffusion plate, and the planar light source comprises a first substrate, a second substrate and at least one protective layer. The first substrate has a first surface and a second surface, and the second substrate and the second surface are disposed on the 200929321, and the plurality of spacers are disposed between the first substrate and the second substrate, and the protective layer is disposed at the first surface. 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 backlight module. The backlight module is disposed corresponding to the liquid crystal display panel, and has a diffusion plate and a planar light source adjacent to the diffusion plate. The planar light source includes a first substrate, a second substrate, and at least one protective layer. The first substrate has a first surface and a second surface, and the second substrate is disposed corresponding to the second surface, and has a plurality of spacers disposed between the first substrate® and the second substrate, and the protective layer is disposed on the first surface . As described above, a liquid crystal display device, a backlight module, and a planar light source according to the present invention are provided with a light-permeable protective layer having an impact resistance property on a light-emitting surface of a planar light source. Compared with the prior art, the present invention can improve the structural strength of the planar light source, prevent the planar light source from being damaged by external impact, and improve the resistance to impact. [Embodiment] Hereinafter, a liquid crystal display device, a backlight module, and a planar light source according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be denoted by the same reference numerals. Referring to FIG. 2, a planar light source 21 according to a preferred embodiment of the present invention includes a first substrate 211, a second substrate 212, and at least one protective layer 213. The first substrate 211 has a first surface 211a and a second surface 211b. The second substrate 212 is disposed corresponding to the second surface 211b. The first surface 211a serves as a light-emitting surface of the planar light source 21. The first substrate 211 and the second substrate are all made of a glass material, and a plurality of spacers 214 are disposed between the first substrate 211 and the second substrate 212, thereby supporting the first substrate 211 and the second substrate 212. And maintaining the spacing between the first substrate η and the second substrate 12. In addition, the edges of the first substrate 211 and the second substrate 212 further have a bonding structure 215'. The first substrate 211, the second substrate 212, and the sealing structure 215 together form a sealed space. The Ο Ο protective layer 213 is disposed on the first surface 211a and has a single-layer or multi-layer structure having a light transmissive property. In addition, the protective layer 213 further has other properties to enhance the functionality of the planar light source 21 such as, but not limited to, impact resistance, squash resistance, light diffusion, and/or photochromic properties. In addition, the second substrate 2 has an external electrode ^6 and a reflective member 217 with respect to the other side of the first substrate 211. The reflective element 217 is, for example but not limited to, a metal plate, a metal plate body or a metal film layer, and is used to reflect the light that is emitted from the planar light source 21 and to protect the external electrode 216. The protective layer 213 can be a quality of a protective film of an optical film or an optical glass of an optical film, such as an optical film layer, such as a diffusion film or a microlens. The field plane light source 21 is assembled and subjected to the impact test surface light source 21 in the 坌 二 2 011 』 仏 犯 犯 犯 犯 置 置 置 置 置 置 置 置 置 置 置 置 置 置 置 置 置 吏 吏 吏 吏 吏 吏 吏 211 211 211 211 211 211 211 211 211 Deformation or even rupture. In addition, a single-layer or multi-layer composite material having a light transmitting property is constructed by a m-source light source. Temporary τ m is said to be in the shadow. Please take a look at the structural strength of the rain plane light source 21. A backlight module 200929321 20 according to a preferred embodiment of the present invention includes a diffuser panel 22 and a planar light source 21. An optical group consisting of a diffusion sheet 23 and a microlens 24 is further disposed on the diffusion plate 22 to further enhance the optical characteristics. The planar light source 21 has been described in detail in the foregoing embodiments, and therefore will not be described again. A liquid crystal display device 2 of the preferred embodiment of the present invention includes a liquid crystal display panel 30 and a backlight module 20, and the liquid crystal display panel 30 is disposed corresponding to the backlight module 20. The backlight module 20 has been described in detail in the foregoing embodiments, and therefore will not be described again. The liquid crystal display device 2 and the backlight module 20 of the planar light source 21 having the reinforced structure also have impact resistance. In summary, a liquid crystal display device, a backlight module and a planar light source according to the present invention are provided with a light-permeable protective layer having an impact property on a light-emitting surface of a planar light source. Compared with the prior art, the present invention can improve the structural strength of the planar light source, prevent the planar light source from being damaged by external impact, and improve the resistance to impact. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations of the present invention are intended to be included within the scope of the appended claims. 9A is a schematic diagram of a conventional planar light source; FIG. 1B is a schematic diagram of a conventional planar light source impact test; FIG. 2 is a planar light source and impact test according to a preferred embodiment of the present invention. FIG. 3 is a schematic diagram of a liquid crystal display device 9 200929321 and a backlight module according to a preferred embodiment of the present invention. [Description of main component symbols] 10, 21: planar light source 11, 211: first substrate 11a, 211a: first surface lib, 211b: second surface 12, 212: second substrate® 14, 214: spacer 15, 215: sealing structure 16, 216: external electrode 17: reflection sheet 2: liquid crystal display device 20: backlight module 213: protective layer & 217: reflective element 22: diffusion plate 23: diffusion sheet 24: microlens 3 0 LCD display panel +Z, -Z: axial