200819865 九.、發明說明： 【發明所屬之技術領域】 本發明涉及一種應用於液晶顯示之背光模組，尤其涉及 一種採用點光源之直下式背光模組。 【先前技術】 近年來，液晶顯示器由於其輕、薄、小與耗電低等特點， 得到了廣泛應用。由於液晶顯示面板本身不具備發光特性， 故需背光模組爲其提供背光源，來實現液晶顯示面板之顯示 功能。 請參閱圖1，一種習知技術之背光模組之剖面示意圖。 背光模組10包括一框架11，一反射片14，一光學板15及 複數點光源13。框架11包括一底板111及複數從該底板111 邊緣延伸之側壁113,底板111與複數側壁113形成一腔體。 複數點光源13排佈於底板111。光學板15設置於複數側壁 113頂部。反射片14開設有複數與點光源13相對應之通孔 (未標示），且複數點光源13之發光部131穿過相應通孔向 該光學板15發射光束。反射片14 一般爲塑膠薄片製成，強 度較低，使用時容易内凹而變形，造成背光模組10發光異 常。爲此，常常於反射片14下方設置一具有較好強度之金 屬薄板16，用以支撐反射片14。由於複數點光源13之發光 部131分別穿過反射片14之複數通孔，其發光部131也需 要穿越金屬薄板16。組裝時，先將複數點光源13設置於底 板111 ;再將金屬薄板16與反射片14依次設置於底板111 上方，並使得複數點光源13之發光部131穿過金屬薄板16 6 200819865 與反射片14之複數通孔；最後，將光學板15設置於該反射 片14上方並與該複數點光源13相對，以使得發光部131能 夠向光學板15發射光束。 由於金屬薄板16具有較高硬度，點光源13之發光部 131穿過該金屬薄板16之通孔時容易刮傷點光源13，因而 組裝過程需要作業人員高度小心，從而增加組裝工作之難 度。另，背光模組10於使用過程中，金屬薄板16容易變形 輕曲，導致金屬薄板16損毀點光源13，甚至，遮蔽點光源13 之出射光線，從而使得該背光模組10之穩定性較差。 【發明内容】 鑒於上述狀況，有必要提供一種組裝容易與穩定性較好 之直下式背光模組。 一種直下式背光模組，其包括一框架，至少一反射片， 至少一光學板及複數點光源，該框架包括一底板及複數從該 底板邊緣延伸之侧壁，該複數點光源排佈於該底板，該光學 板設置於該複數侧壁頂部，該反射片開設有複數與該點光源 相對應之通孔，且該複數點光源之發光部穿過相應通孔向該 光學板發射光束，該背光模組還包括至少一設置於該底板之 支撐元件，該支撐元件用於支撐該反射片。 相較于習知技術，本實施例直下式背光模組於底板設置 支撐元件，藉由支撐元件支撐該反射片，無需使用金屬薄 板，從而避免了點光源之發光部穿過金屬薄板之通孔之組裝 過程，不存在金屬薄板刮傷點光源等情況。並且，因未使用 金屬薄板支撐反射片，不存在金屬薄板變形勉曲損毀點光源 7 200819865 甚至遮蔽點光源之出射光線之現象。故，該背光模組具有組 裝容易與穩定性較好之特點。 ' 【實施方式】 下面將結合附圖及複數實施例對本發明之背光模組進 一步詳細說明。 請一併參閱圖2與圖3,本發明背光模組較佳實施例一 提供一種背光模組30。該背光模組30包括一框架 射片34，一光學板35及複數點光源33 〇框架4 Λ ”丄巴括一底 板311及複數從該底板311邊緣延伸之側壁313， 抵板311 與複數侧壁313形成一腔體（未標示）。複數點光源彳非佈 於底板311。光學板35設置於複數側壁313頂部。北土# 月光模組 30還包括複數設置於底板311之支撐元件36，每—支_ _ 件36包括一平板361及連接於平板361之複數支腳36f凡 撐元件36用於於腔體内支撐反射片34。反射片34開#有^ 數與點光源33相對應之通孔，且複數點光源33之發光_ 穿過相應通孔向光學板35發射光束。 平板361爲長條狀，且每一平板361具有一項持反射 34之頂面3611及一與該頂面3611相對之背面361 _、片 。該巷 數支腳362形成於背面3613且朝向該底板311之古人 向延伸， 退離平板361之一端固定於底板311上。本實施例 362遠離平板361之一端係藉由雙面膠黏合之方式^ 板311。 疋於底 組裝時，先將點光源33與支撐元件36之支腧 J62固定 於底板311上；然後，將反射片34設置於複數支斤- 又 牙元件36 200819865 之頂面3611，複數點光源33之發光部331分別穿過複數通 孔，以使得複數點光源33之發光部331位於反射片34上方。 最後，將光學板35設置於反射片34上方並與複數點光源33 之發光部331相對，以使得發光部331能夠向光學板35發 射光束。 背光模組30藉由於底板311設置支撐元件36，支撐元 件36支撐該反射片34，替代了採用一整塊金屬薄板支撐反 射片之設置方式，使得背光模組30無需使用金屬薄板，從 而避免了點光源33之發光部331穿過金屬薄板之通孔之組 裝過程，不存在金屬薄板對點光源33之刮傷等現象。並且， 採用設置於底板311之支撐元件36替代金屬薄板支撐反射 片34，不存在金屬薄板變形翹曲損毀點光源33甚至遮蔽點 光源33之出射光線之現象。故，該背光模組30具有較好之 使用穩定性。 可以理解，複數支撐元件36之形狀與大小可以相同， 也可以不同；並且，爲了使反射片34不會從平板361之頂 面3611上滑動或脫落，該反射片34可藉由一黏合層黏合於 該頂面3611。該黏合層可爲一雙面膠黏合層或黏合劑所形成 之黏合層。 請一併參閱圖4與圖5,本發明背光模組較佳實施例二 提供一種背光模組50,其與本發明之第一實施例提供之背光 核組3 0結構相似’其不同在於·反射片有兩片’分別爲反 射片541與542, 一支撐元件56設置於兩反射片541與542 之間。支撐元件56之平板之頂面5611形成有一垂直於平板 9 200819865 之頂面5611之反射隔板565，該反射隔板565爲長條狀，且 該反射隔板565延伸方向與該平板之長度方向相同。反射隔 板565兩側之頂面5611部分分別形成有複數定位銷563與 卡扣結構564。對應反射片541與542靠近反射隔板565之 一側開設有與複數定位銷563與卡扣結構564相對應之複數 定位孔（圖未示）與卡扣孔（圖未示）。兩反射片541與542 分別設置於反射隔板565之兩側，且反射片541與542靠近 反射隔板565之一側藉由卡扣結構564與卡扣孔之配合固定 於頂面5611。定位銷563與定位孔之配合可使反射片541 與542組裝時更容易準確定位。 於大尺寸之背光模組中，反射隔板565具有提升該背光 模組50之光學均勻性之作用。該反射隔板565可直接由高 反射率之塑膠材質製成。該反射隔板565也可爲一反射板基 體表面形成一反射層之方式製成，該反射層可爲貼合於反射 板基體表面之高反射率反射片、塗佈於反射板基體表面之高 反射率油墨層與電鍍於反射板基體表面之高反射率之金屬 層中一種。 另，頂面5611還可形成有複數朝向光學板55方向延伸 之頂持柱567。頂持柱567遠離該平板之一端頂持光學板 55,避免光學板55因爲強度不足而内凹變形。 可以理解，靠近底板邊緣之支撐元件之頂面也可形成頂 持柱、反射隔板、定位銷及卡扣結構等結構；並且，頂持柱、 反射隔板、定位銷及卡扣結構之數量可爲一個，也可全部或 部分省略。 200819865 :請參閱圖6，本發明背光模組較佳實施例三提供一種背 光模組60，其與本發明之第二實施例提供之背光模組50結 構相似，其不同在於：支撐元件66未使用定位銷及卡扣結 構，而於頂面6611開設有複數固持孔（未標示）。反射片64 也開設有複數與該固持孔相對應之固定孔（未標示）。藉由 複數銷釘67與固持孔及固定孔之配合而將反射片64固定於 支撐元件66之頂面6611。可以理解，於小尺寸之背光模組 中，反射隔板可省略，反射片可爲一片，因此，固持孔之數 量也可爲一個。 請參閱圖7，本發明背光模組較佳實施例四提供一種背 光模組70，其與本發明之第二實施例提供之背光模組50結 構相似，其不同在於：該底板711上開設有複數開口 7111， 支撐元件76之複數支腳762遠離該平板之一端形成有卡扣 結構，該複數支腳762遠離平板之一端之卡扣結構穿過該開 口 7111並與該開口 7111形成卡扣配合，這樣，該複數支腳 762遠離該平板之一端固定於該底板711上。 請參閱圖8，本發明背光模組較佳實施例五提供一種背 光模組80，其與本發明之第四實施例提供之背光模組70結 構相似，其不同在於：支撐元件之支腳未使用卡扣結構，而 背面8613形成有朝向底板811方向延伸之鎖合腳862,該鎖 合腳862遠離該平板之一端端面開設有一螺孔，該底板811 也形成有與該螺孔相配合之鎖孔。該支撐元件86藉由螺孔、 鎖孔及外加螺絲82鎖附於底板811上。可以理解，螺孔也 可形成於部分或全部支腳遠離平板之一端端面，這樣，支腳 11 200819865 遠離平板之一端也可藉由螺絲鎖附之方式固定於底板。 可以理解，形成於平板背面之支腳可以爲柱狀、板狀或 其組合結構；該支腳與平板之連接位置可依據設計之需要而 改變，即該支腳也可連接於平板之背面，也可連接於平板之 侧邊。並且，支腳遠離該平板之一端除可藉由黏合、卡扣配 合、螺絲鎖附等方式固定於該底板外，還可藉由熱熔接之方 式固定於底板上。此外，依據背光模組實際尺寸之大小可相 應調節支撐元件之數量及支撐元件於底板上之相對位置；而 且，只要支撐元件能設置於底板並具有支撐反射片之功能， 支撐元件還可設計爲一簡單之柱體結構等其他結構。另，該 點光源可為一普通發光二極體，其也可為一白光發光二極體 等。 本發明之背光模組，背光模組於底板設置支撐元件，藉 由支撐元件支撐該反射片，無需使用金屬薄板，從而避免了 點光源之發光部穿過金屬薄板之通孔之組裝過程，不存在金 屬薄板刮傷點光源等情況。並且，因未使用金屬薄板支撐反 射片，不存在金屬薄板變形翹曲損毀點光源甚至遮蔽點光源 之出射光線之現象。故，該背光模組具有組裝容易與穩定性 較好之特點。另外，反射片可以多片，該設置方式可增加設 置與製造反射片的靈活性，即較大面積的背光模組可採用兩 片或多片面積較小的反射片組合，便於製造與生產。 綜上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施例，舉凡熟悉 本案技藝之人士，在爰依本發明精神所作之等效修飾或變 12 200819865 化，皆應涵蓋於以下之申請專利範圍内。 【圖式簡單說明】 圖1係習知背光模組之剖面示意圖。 圖2係本發明背光模組較佳實施例一之剖面示意圖。 圖3係圖2所示意之支#元件立體示意圖。 圖4係本發明背光模組較佳實施例二之剖面示意圖。 圖5係圖4所示意之支撐元件立體示意圖。 圖6係本發明背光模組較佳實施例三之局部剖面示意 圖。 圖7係本發明背光模組較佳實施例四之局部剖面示意 圖。 圖8係本發明背光模組較佳實施例五之局部剖面示意 圖。 【主要元件符號說明】 (本發明） 背光模組 30 、 50 、 60 、 70 、 框架 31 底板 311 、 711 、 811 側壁 313 點光源 33 發光部 331 反射片 34 、 541 、 542 、 64 光學板 35 支撐元件 36 、 56 、 66 、 76 、 13 200819865 :平板 361 頂面 3611 、 5611 、 6611 背面 3613 、 8613 支腳 362 、 762 定位銷 563 卡扣結構 564 反射隔板 565 頂持柱 567 銷釘 67 開口 7111 螺絲 82 鎖合腳 862 習知） 背光模組 10 框架 11 底板 111 側壁 113 點光源 13 發光部 131 反射片 14 光學板 15 金屬薄板 16 14200819865 IX. Inventive Description: [Technical Field] The present invention relates to a backlight module for liquid crystal display, and more particularly to a direct type backlight module using a point source. [Prior Art] In recent years, liquid crystal displays have been widely used due to their characteristics of lightness, thinness, small size, and low power consumption. Since the liquid crystal display panel itself does not have the light-emitting property, the backlight module is required to provide a backlight to realize the display function of the liquid crystal display panel. Please refer to FIG. 1 , which is a schematic cross-sectional view of a conventional backlight module. The backlight module 10 includes a frame 11, a reflection sheet 14, an optical plate 15, and a plurality of point light sources 13. The frame 11 includes a bottom plate 111 and a plurality of side walls 113 extending from the edge of the bottom plate 111. The bottom plate 111 and the plurality of side walls 113 form a cavity. The plurality of point light sources 13 are arranged on the bottom plate 111. The optical plate 15 is disposed on the top of the plurality of side walls 113. The reflection sheet 14 is provided with a plurality of through holes (not shown) corresponding to the point light source 13, and the light emitting portion 131 of the plurality of point light sources 13 emits a light beam to the optical plate 15 through the corresponding through holes. The reflection sheet 14 is generally made of a plastic sheet, has a low strength, and is easily concave and deformed during use, thereby causing the backlight module 10 to emit light abnormally. For this reason, a metal thin plate 16 having a good strength is often disposed under the reflection sheet 14 to support the reflection sheet 14. Since the light-emitting portions 131 of the plurality of point light sources 13 respectively pass through the plurality of through holes of the reflection sheet 14, the light-emitting portion 131 also needs to pass through the metal thin plate 16. In the assembly, the plurality of point light sources 13 are first disposed on the bottom plate 111; the metal sheets 16 and the reflection sheets 14 are sequentially disposed above the bottom plate 111, and the light-emitting portions 131 of the plurality of point light sources 13 are passed through the metal sheets 16 6 200819865 and the reflection sheets. Finally, the optical plate 15 is disposed above the reflection sheet 14 and opposed to the complex point light source 13 so that the light emitting portion 131 can emit a light beam to the optical plate 15. Since the thin metal plate 16 has a high hardness, the light-emitting portion 131 of the point light source 13 easily scratches the point light source 13 when passing through the through hole of the metal thin plate 16, so that the assembly process requires a high degree of care of the operator, thereby increasing the difficulty of assembly work. In addition, during the use of the backlight module 10, the thin metal plate 16 is easily deformed and lightly curved, causing the thin metal plate 16 to damage the point source 13 and even the light emitted from the point source 13 to make the backlight module 10 less stable. SUMMARY OF THE INVENTION In view of the above circumstances, it is necessary to provide a direct type backlight module which is easy to assemble and has good stability. A direct type backlight module includes a frame, at least one reflective sheet, at least one optical plate and a plurality of point light sources, the frame includes a bottom plate and a plurality of side walls extending from an edge of the bottom plate, wherein the plurality of point light sources are arranged a bottom plate, the optical plate is disposed on the top of the plurality of side walls, the reflective sheet is provided with a plurality of through holes corresponding to the point light source, and the light emitting portion of the plurality of point light sources emits a light beam to the optical plate through the corresponding through holes, The backlight module further includes at least one supporting member disposed on the bottom plate, the supporting member for supporting the reflective sheet. Compared with the prior art, the direct type backlight module of the present embodiment is provided with a supporting member on the bottom plate, and the supporting member supports the reflecting sheet without using a thin metal plate, thereby avoiding the light emitting portion of the point light source passing through the through hole of the metal thin plate. In the assembly process, there is no metal sheet scraping point light source. Moreover, since the reflective sheet is not supported by the thin metal plate, there is no distortion of the thin metal plate and the light source is damaged. 2008-09-08 Even the phenomenon of the light emitted from the point source is blocked. Therefore, the backlight module has the characteristics of easy assembly and good stability. [Embodiment] Hereinafter, a backlight module of the present invention will be further described in detail with reference to the accompanying drawings and the embodiments. Referring to FIG. 2 and FIG. 3 together, a preferred embodiment 1 of the backlight module of the present invention provides a backlight module 30. The backlight module 30 includes a frame sheet 34, an optical plate 35 and a plurality of point light sources 33 〇 frame 4 丄 括 括 底板 a bottom plate 311 and a plurality of side walls 313 extending from the edge of the bottom plate 311, the plate 311 and the plurality of sides The wall 313 forms a cavity (not shown). The plurality of point sources are not disposed on the bottom plate 311. The optical plate 35 is disposed on the top of the plurality of side walls 313. The north earth #月光 module 30 further includes a plurality of supporting members 36 disposed on the bottom plate 311. Each of the support members 36 includes a flat plate 361 and a plurality of legs 36f connected to the flat plate 361. The support member 36 is used to support the reflective sheet 34 in the cavity. The reflective sheet 34 has a number corresponding to the point source 33. The through holes, and the light of the plurality of point sources 33 emit light beams through the corresponding through holes to the optical plate 35. The plates 361 are elongated, and each plate 361 has a top surface 3611 of the reflection 34 and a The top surface 3611 is opposite to the back surface 361 _, the sheet. The lane number leg 362 is formed on the back surface 3613 and extends toward the ancient person of the bottom plate 311, and one end of the retracting plate 361 is fixed on the bottom plate 311. The embodiment 362 is away from the flat plate 361. One end is bonded by double-sided tape ^ 311 When the bottom assembly is performed, the point source 33 and the support J62 of the support member 36 are first fixed on the bottom plate 311; then, the reflection sheet 34 is disposed on the top surface 3611 of the plurality of teeth-tooth elements 36 200819865, the plurality of point sources The light-emitting portions 331 of 33 pass through the plurality of through holes, respectively, so that the light-emitting portions 331 of the plurality of point light sources 33 are positioned above the reflection sheet 34. Finally, the optical plate 35 is disposed above the reflection sheet 34 and with the light-emitting portion 331 of the plurality of point light sources 33. In contrast, the light-emitting portion 331 can emit a light beam to the optical plate 35. The backlight module 30 supports the reflective sheet 34 by the support member 36 by the bottom plate 311 instead of using a single metal thin plate to support the reflective sheet. In a manner, the backlight module 30 does not need to use a metal thin plate, thereby avoiding the assembly process of the light-emitting portion 331 of the point light source 33 passing through the through-hole of the metal thin plate, and there is no phenomenon that the thin metal plate is scratched by the point light source 33. The support member 36 disposed on the bottom plate 311 replaces the thin metal plate to support the reflective sheet 34, and there is no metal thin plate deformation warpage damage point light source 33 or even the light emitted from the point source 33 Therefore, the backlight module 30 has better stability of use. It can be understood that the shape and size of the plurality of support members 36 may be the same or different; and, in order to prevent the reflection sheet 34 from coming from the top of the flat plate 361 The reflective sheet 34 can be adhered to the top surface 3611 by an adhesive layer. The adhesive layer can be an adhesive layer formed by a double-sided adhesive layer or an adhesive. Please refer to FIG. 4 together. As shown in FIG. 5, a backlight module 50 of the present invention is similar to the backlight core assembly 30 provided by the first embodiment of the present invention. The difference is that the reflection sheet has two pieces. Respective sheets 541 and 542, respectively, and a supporting member 56 is disposed between the two reflecting sheets 541 and 542. The top surface 5611 of the flat plate of the support member 56 is formed with a reflective partition 565 perpendicular to the top surface 5611 of the flat plate 9 200819865. The reflective partition 565 is elongated and the reflective partition 565 extends in the direction of the length of the flat plate. the same. A plurality of positioning pins 563 and a snap structure 564 are formed on portions of the top surface 5611 on both sides of the reflective spacer 565, respectively. A plurality of positioning holes (not shown) and snap holes (not shown) corresponding to the plurality of positioning pins 563 and the buckle structure 564 are formed on the side of the corresponding reflection sheets 541 and 542 adjacent to the reflection partition 565. The two reflective sheets 541 and 542 are respectively disposed on the two sides of the reflective partition 565, and one side of the reflective sheets 541 and 542 adjacent to the reflective partition 565 is fixed to the top surface 5611 by the engagement of the snap structure 564 and the snap hole. The cooperation of the positioning pin 563 and the positioning hole makes it easier to accurately position the reflective sheets 541 and 542 when assembled. In a large-sized backlight module, the reflective spacer 565 has the effect of enhancing the optical uniformity of the backlight module 50. The reflective spacer 565 can be directly made of a high reflectivity plastic material. The reflective spacer 565 can also be formed by forming a reflective layer on the surface of the reflector substrate. The reflective layer can be a high reflectivity reflective sheet attached to the surface of the reflector substrate and coated on the surface of the reflector substrate. One of the reflectivity ink layer and the high reflectivity metal layer plated on the surface of the reflector substrate. Alternatively, the top surface 5611 may be formed with a plurality of top pillars 567 extending toward the optical plate 55. The top holding post 567 holds the optical plate 55 away from one end of the flat plate to prevent the optical plate 55 from being concavely deformed due to insufficient strength. It can be understood that the top surface of the supporting member near the edge of the bottom plate can also form a structure such as a top holding post, a reflecting partition, a positioning pin and a snap structure; and the number of the top holding post, the reflecting partition, the positioning pin and the snap structure It can be one or it can be omitted in whole or in part. 200819865: Referring to FIG. 6, a preferred embodiment 3 of the backlight module of the present invention provides a backlight module 60, which is similar in structure to the backlight module 50 according to the second embodiment of the present invention, except that the support member 66 is not A locating pin and a snap structure are used, and a plurality of retaining holes (not shown) are opened on the top surface 6611. The reflection sheet 64 is also provided with a plurality of fixing holes (not shown) corresponding to the holding holes. The reflection sheet 64 is fixed to the top surface 6611 of the support member 66 by the cooperation of the plurality of pins 67 with the holding holes and the fixing holes. It can be understood that in a small-sized backlight module, the reflective spacer can be omitted, and the reflective sheet can be one piece. Therefore, the number of holding holes can also be one. Referring to FIG. 7 , a preferred embodiment 4 of the backlight module of the present invention provides a backlight module 70 , which is similar in structure to the backlight module 50 according to the second embodiment of the present invention. The difference is that the bottom plate 711 is opened. The plurality of openings 7111, the plurality of legs 762 of the supporting member 76 are formed with a snap structure away from one end of the flat plate, and the latching structure of the plurality of legs 762 away from the one end of the flat plate passes through the opening 7111 and forms a snap fit with the opening 7111. Thus, the plurality of legs 762 are fixed to the bottom plate 711 away from one end of the flat plate. Referring to FIG. 8 , a preferred embodiment 5 of the backlight module of the present invention provides a backlight module 80 , which is similar in structure to the backlight module 70 provided by the fourth embodiment of the present invention, and the difference is that the supporting members are not provided. A locking structure is used, and the back surface 8613 is formed with a locking leg 862 extending toward the bottom plate 811. The locking leg 862 defines a screw hole away from an end surface of the flat plate. The bottom plate 811 is also formed with a locking hole matched with the screw hole. . The support member 86 is locked to the bottom plate 811 by a screw hole, a lock hole and a captive screw 82. It can be understood that the screw hole can also be formed on one or all of the legs away from the end surface of one end of the plate, so that the leg 11 200819865 can be fixed to the bottom plate by screwing. It can be understood that the legs formed on the back surface of the flat plate may be columnar, plate-shaped or a combination thereof; the connection position of the legs and the flat plate may be changed according to the design requirement, that is, the legs may also be connected to the back of the flat plate. It can also be attached to the side of the plate. Moreover, the one end of the leg away from the flat plate can be fixed to the bottom plate by adhesive bonding, snap fitting, screw locking, etc., and can be fixed to the bottom plate by heat welding. In addition, according to the actual size of the backlight module, the number of support members and the relative position of the support member on the bottom plate can be adjusted correspondingly; and, as long as the support member can be disposed on the bottom plate and has the function of supporting the reflective sheet, the support member can also be designed as A simple structure such as a cylinder structure. In addition, the point light source may be a common light emitting diode, which may also be a white light emitting diode or the like. In the backlight module of the present invention, the backlight module is provided with a supporting member on the bottom plate, and the supporting member supports the reflecting sheet without using a metal thin plate, thereby avoiding the assembly process of the light emitting portion of the point light source passing through the through hole of the metal thin plate, There is a case where a thin metal plate scratches a point light source or the like. Moreover, since the reflective sheet is not supported by the metal thin plate, there is no phenomenon that the thin metal plate deforms and warps the light source and even the light emitted from the point light source. Therefore, the backlight module has the characteristics of easy assembly and good stability. In addition, the reflective sheet can be multi-piece. This arrangement can increase the flexibility of setting and manufacturing the reflective sheet. That is, the larger-area backlight module can be combined with two or more reflective sheets having a smaller area, which is convenient for manufacturing and production. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and those skilled in the art will be able to cover the equivalent modifications or changes in the spirit of the present invention. . BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a conventional backlight module. 2 is a cross-sectional view showing a preferred embodiment 1 of a backlight module of the present invention. FIG. 3 is a schematic perspective view of the component of FIG. 4 is a cross-sectional view showing a second preferred embodiment of the backlight module of the present invention. Figure 5 is a perspective view of the support member shown in Figure 4. Figure 6 is a partial cross-sectional view showing a preferred embodiment 3 of the backlight module of the present invention. Figure 7 is a partial cross-sectional view showing a preferred embodiment 4 of the backlight module of the present invention. Figure 8 is a partial cross-sectional view showing a preferred embodiment 5 of the backlight module of the present invention. [Main component symbol description] (Invention) Backlight module 30, 50, 60, 70, frame 31 Base plate 311, 711, 811 Side wall 313 Point light source 33 Light-emitting portion 331 Reflecting sheet 34, 541, 542, 64 Optical plate 35 Support Components 36, 56, 66, 76, 13 200819865: Flat 361 top surface 3611, 5611, 6611 back 3613, 8613 legs 362, 762 locating pin 563 snap structure 564 reflective spacer 565 top post 567 pin 67 opening 7111 screw 82 Locking foot 862 Conventional backlight module 10 Frame 11 Base plate 111 Side wall 113 Point light source 13 Light-emitting portion 131 Reflecting sheet 14 Optical plate 15 Metal sheet 16 14