201017286 九、發明說明: 【發明所屬之技術領域】 本發明係關於一種背光模組,特別是關於一種背光模 組之導光板設計。 【先前技術】 隨者科技進步,各式資訊產品如:手機、筆記型電腦、 數位相機、PDA、液晶螢幕等產品越來越普及,使得液晶顯 示器的需求量大大提升,然而液晶面板本身並不發光,需 要藉由一背光源的設置才得以進行顯示,而背光模組係主 要作為液晶顯示器的背光源,一般背光模組有二種,包括 了直下式以及侧光式背光模組,其中,側光式背光模組的 主要構件包括了電路板、光源、反射片、導光板,以及擴 散板等。 請參照第一A圖,係習知技術側光式背光模組之示意 圖’習知技術之背光模組包括一導光板11〇以及複數個LED 120,其中導光板具有一出光面幻以及一入光面兕, 且入光面S2係位於出光面S1之一侧邊,而複數個LED 12〇 係以一間距設置於導光板11〇之入光面兕。當LED12〇所 發散的光線自導光板11〇之入光面S2射入,再由導光板 110之出光面S1射出,以提供液晶面板所需之光源。 然而,請參照第一 β圖,其係習知技術侧光式背光模 組之放大圖,LED 120發散光線行進路徑如圖所示,LED 120 發散角度為120度,並非18〇度之平面光,因而在LED12〇 201017286 相鄰間隔内必有光量不均之現象,LED 1201所發射光線為 光徑〇至光徑P的角度範圍,LED 1202所發射光線為光徑 Q至光徑R的角度範圍’而光徑P與光徑Q之間,會有: ' ,線無法涵蓋之區域a,也就是造成熱點(h〇t印饥)與角 落暗塊的部分,目此每二個LED120附尤有一熱點,因、而 導致亮度不均的現象。 有鑑於上述習知技術之背光模組所產生之亮度不均現 a ’造細轉的品質降躺影_示n賴爭力,因此 業人貞莫不希望提出—實際有效轉決方案,以解 決前述之問題。 胖 【發明内容】 本發明目的係在於改善習知技術於導光板中所造 度不均的現象。 ❹ 本發明之背絲組包括—導級、紐個·以及複 数個凸塊。 光板具有—出光面以及—人光面,且人光面 你減* 4面之一侧邊且連接於出光面。複數個LED係分 佈於導光板的入光面,且 則設置於導光板的出光面上,==配複 置,其中凸塊具有一斜面與—直立面。 在角度為120度’並非180度之平面光,因而 有❹不均之現象,為了解決該困 擾,本發明係·凸塊其斜面,使咖入射至導光板的光 6 201017286 線,受到斜面的反射而傳遞至凸堍正下方的導光板中。藉 此,可增加光線於凸塊下方區域中傳遞的機會,並增加了 光線由凸塊其斜面射出的機會,因此解決習知技術中,相 鄰二LE1D間之光線無法涵蓋之區域所造成熱點與角落暗塊 的現象,進而改善亮度不均的困擾。 關於本發明之優點與精神,以及更詳細的實施方式可 以藉由以下的實施方式以及所附圖式得到進一步的瞭解。201017286 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to a light guide plate design of a backlight module. [Prior Art] With the advancement of technology, various information products such as mobile phones, notebook computers, digital cameras, PDAs, LCD screens and other products are becoming more and more popular, which makes the demand for liquid crystal displays greatly improved. However, the liquid crystal panels themselves are not The illumination needs to be displayed by a backlight setting, and the backlight module is mainly used as a backlight of the liquid crystal display. Generally, there are two kinds of backlight modules, including a direct type and an edge type backlight module, wherein The main components of the edge-lit backlight module include a circuit board, a light source, a reflection sheet, a light guide plate, and a diffusion plate. Please refer to FIG. 1A, which is a schematic diagram of a prior art edge-lit backlight module. The backlight module of the prior art includes a light guide plate 11〇 and a plurality of LEDs 120, wherein the light guide plate has a light-emitting surface and an input. The light surface 兕, and the light incident surface S2 is located on one side of the light emitting surface S1, and the plurality of LEDs 12 are disposed at a pitch on the light incident surface of the light guide plate 11〇. When the light emitted by the LED 12A is incident from the light incident surface S2 of the light guide plate 11 and then emitted from the light exit surface S1 of the light guide plate 110, the light source required for the liquid crystal panel is provided. However, please refer to the first β-picture, which is an enlarged view of the conventional side-lit backlight module. The LED 120 divergent light travel path is as shown in the figure, and the LED 120 has a divergence angle of 120 degrees, which is not a plane light of 18 degrees. Therefore, there must be uneven light quantity in the adjacent interval of LED12〇201017286. The light emitted by LED 1201 is the angular range of optical path 〇 to optical path P, and the light emitted by LED 1202 is the angle of optical path Q to optical path R. The range 'between the optical path P and the optical path Q, there will be: ', the area a which cannot be covered by the line, that is, the part that causes the hot spot (h〇t hunger) and the corner dark block, so that every two LEDs 120 are attached. There is a hot spot, which leads to uneven brightness. In view of the uneven brightness produced by the backlight module of the above-mentioned prior art, the quality of the thinning is reduced, so the industry does not wish to propose an actual effective conversion scheme to solve the foregoing. problem. [Explanation] The object of the present invention is to improve the phenomenon in which the prior art is unevenly formed in a light guide plate.背 The back yarn set of the present invention includes a guide, a button, and a plurality of bumps. The light board has a light-emitting surface and a human light surface, and the human light surface is reduced by one side of the four sides and connected to the light-emitting surface. A plurality of LEDs are distributed on the light incident surface of the light guide plate, and are disposed on the light exit surface of the light guide plate, and are provided with a slope, wherein the bump has a slope and an upright surface. In the case of an angle of 120 degrees, which is not a plane light of 180 degrees, there is a phenomenon of unevenness. In order to solve this problem, the present invention is a beveled surface of the bump, so that the light is incident on the light guide plate 6 201017286 line, and is inclined. Reflected and transmitted to the light guide plate directly below the tenon. Thereby, the opportunity of light transmission in the area under the bump can be increased, and the opportunity for the light to be emitted by the bevel of the bump is increased, so that the hot spot caused by the area between the adjacent LE1Ds cannot be covered by the prior art. The phenomenon of dark blocks with corners, thereby improving the unevenness of brightness. The advantages and spirit of the present invention, as well as the more detailed embodiments, may be further understood by the following embodiments and the accompanying drawings.
L實施方式】 請參照第二A圖’其係本發鴨提供背光模組第一實 施例之示意圖。本發明之背光模组包括一導光板21〇、複 數個LED 220以及複數個凸塊23Q。 導光板210具有-出光面S3、連接於出光面%之一 ^光面S4、以及相對於該出光面%之一底面(圖中未顯 不)’其中入光面S4j£好位於出光面%之一侧邊。至於, 複數個LED 220則分佈於導光板21〇之入光面&,且相鄰 兩個⑽220係以-間距_此隔開。所述複數個凸塊 230,設置於導光板21〇之出光面%上,並與該些· 22〇 ^錯配置。亦即’對每一個⑽220而言,其所設置的位 置,正好是位於兩個相鄰的凸塊23〇之間。 f較佳實施例中,所述凸塊23〇為三角狀的傾斜凸 =具有彼此連接之-斜面23Ga與一直立面遍,並 ㈣直立面230b、係平行於導光板21〇之入光面&。此外, 由;2G3係以—體成形的方式製作於導光板210上。 由於導光板210與凸塊咖具有相同的材質,因此其具有 201017286 相同的透射係數與反射係數。 如此,當LED 220所發散的光線自導光板21〇之入光 面S4射入,經由導光板21〇與凸塊23〇的内部反射後,最 終會由出光面S3或凸塊230的斜面230a射出,以提供液 晶面板所需的光源。 少此外,如同前述,由於led 220與凸塊230在分佈上 係彼此錯開配置,並且相鄰兩個LED 22〇間係以間距D隔L. Embodiments Referring to Figure 2A, a schematic diagram of a first embodiment of a backlight module is provided. The backlight module of the present invention comprises a light guide plate 21, a plurality of LEDs 220 and a plurality of bumps 23Q. The light guide plate 210 has a light-emitting surface S3, a light-emitting surface %, a light-emitting surface S4, and a bottom surface (not shown) with respect to the light-emitting surface %, wherein the light-incident surface S4j is located at the light-emitting surface. One side. As for the plurality of LEDs 220, they are distributed on the light incident surface & amp of the light guide plate 21, and the adjacent two (10) 220 are separated by a pitch. The plurality of bumps 230 are disposed on the light-emitting surface % of the light guide plate 21, and are disposed in error with the plurality of light-emitting surfaces. That is, for each (10) 220, the position is set to be exactly between two adjacent bumps 23A. In the preferred embodiment, the bumps 23 are triangular-shaped inclined protrusions = the inclined faces 23Ga and the upright faces are connected to each other, and the (four) upright faces 230b are parallel to the light-incident surface of the light guide plate 21 &. Further, the 2G3 is formed on the light guide plate 210 by means of body molding. Since the light guide plate 210 has the same material as the bumper, it has the same transmission coefficient and reflection coefficient of 201017286. In this way, when the light emitted by the LED 220 is incident on the light incident surface S4 of the light guide plate 21, and is reflected by the light guide plate 21 and the inside of the bump 23, the light exit surface S3 or the slope 230a of the bump 230 is finally formed. Ejected to provide the light source required for the LCD panel. In addition, as before, since the LEDs 220 and the bumps 230 are arranged in a staggered relationship with each other, and the adjacent two LEDs 22 are separated by a pitch D.
開^因此,在較佳實施例中,每一個凸塊23〇其直立面23此 的寬度,會大約等於兩個相鄰LED 22〇之間的間距D。如 此來母個LED 220正好會位於兩個相鄰凸塊mo之 間。換言之,對兩個相鄰的LED 22〇而言,其間正好會夾 著一個凸塊230。 曰 更者’如第二A圖所示,在本發明第一實施例中,凸 塊230其直立面230b ’係切齊於導光板210的入光面S4。 亦即’凸塊230的直立面23〇b,係直接連接於導光板21〇 的入光面S4,並且與入光面S4位於同一個平面上。 另外,為了防止由LED 220入射至導光板21〇的光線, 由導光板210的底面向外逸漏,本發明所提供的背光模 組,更包含-反職24G,其係設置於導光板21()的下方, 可貼附於導光板210的絲,用以將穿過導光板21〇底面 2線,再度反射回導光板内部,輯到防線 外逸射的目的。 請參照第二B圖,其係本發明背光模組第—實施 局部放大圖,用以顯示LED⑽的光線在人射至導光板· 201017286 後其光線路徑的分佈情形。如同前述,由於Led 220其射 出光線的發散角度大約為120度,而非180度的平面光, 因此,在兩個相鄰LED 220的間隔内,往往會有光量不均 的現象。 為了解決此問題’本發明係在導光板21〇的出光面S3 上製作凸塊230。由於凸塊230的斜面230a與出光面S3 間具有一傾斜夾角,因此,對於由LED 220入射至導光板 210的光線而言,在照射至斜面23〇a時,受到斜面230其 ® 傾斜角度的影響,反射的光線相當程度上會侷限在凸塊 正下方的導光板210區域中。換言之,由於凸塊230 其斜面230a可增加光線反射至該部份導光板21〇中的機 率,因此,可提昇該部份導光板21〇的亮度,解決第一 b 圖中習知技術其區域a亮度不足的問題。 因為增加了光線反射回凸塊230正下方區域的機率, 因此’光線最終穿透斜面230a射出的機會,也相當程度的 獲得提昇。請參照第二B圖,此部份的圖示,用以顯示由 瞻 LED 2201與2202入射至導光板210後,其可能的光線路 徑示意圖。 以LED 2201為例,如同前述,其所射出的光線大約具 有120度的發散角度’亦即,大約夾在光徑1與光徑4的 角度範圍内,同樣的,由LED2202所射出的光線其發散的 角度大约介於光控7與光徑10所夾的角度範圍内。其中', 沿著光徑1以及光徑4射出的光線,在進入導光板21〇後, 可月b會文到斜面230a的反射’而行進至凸塊230正下方的 區域内’最終再穿透斜面230a射出。 201017286 因此,沿著光徑1以及光徑4射出的光線,在受到斜 面230a的反射後,會沿著光徑2以及光徑5傳遞,再經由 導光板210底部的反射,而沿著光徑3以及光徑6,分別 由兩個相鄰凸塊230的斜面230a穿透射出。同樣地,LED 2202所發射光線,也會沿著光徑7以及光徑10傳遞,經 過斜面230a反射,而沿著光徑8以及光徑11傳遞,再經 過導光板210底部反射而沿著光徑9以及光徑12,分別由 兩個相鄰凸塊230的斜面230a射出。Thus, in the preferred embodiment, the width of each of the bumps 23, their upright faces 23, will be approximately equal to the spacing D between two adjacent LEDs 22''. Thus, the parent LED 220 is located just between two adjacent bumps mo. In other words, for two adjacent LEDs 22, a bump 230 is sandwiched therebetween. Further, as shown in Fig. 2A, in the first embodiment of the present invention, the upright surface 230b' of the bump 230 is aligned with the light incident surface S4 of the light guide plate 210. That is, the upright surface 23〇b of the bump 230 is directly connected to the light incident surface S4 of the light guide plate 21A, and is located on the same plane as the light incident surface S4. In addition, in order to prevent the light incident from the LED 220 to the light guide plate 21 from being escaping outward from the bottom surface of the light guide plate 210, the backlight module provided by the present invention further includes a - counter-service 24G, which is disposed on the light guide plate 21 Below the (), the wire that can be attached to the light guide plate 210 is used to pass through the bottom surface of the light guide plate 21 and reflect back to the inside of the light guide plate to capture the escape from the line. Please refer to FIG. 2B, which is a partial enlarged view of the backlight module of the present invention, for displaying the distribution of the light path of the LED (10) after the light is emitted to the light guide plate 201017286. As described above, since the Led 220 emits light at a divergence angle of about 120 degrees instead of 180 degrees, there is often a problem of uneven light amount in the interval between two adjacent LEDs 220. In order to solve this problem, the present invention is to form a bump 230 on the light-emitting surface S3 of the light guide plate 21A. Since the inclined surface 230a of the bump 230 has an oblique angle with the light-emitting surface S3, the light incident on the light guide plate 210 by the LED 220 is inclined by the inclined surface 230 when irradiated to the inclined surface 23〇a. The reflected light is considerably confined to the area of the light guide plate 210 directly under the bump. In other words, since the inclined surface 230a of the bump 230 can increase the probability of light being reflected into the portion of the light guide plate 21, the brightness of the portion of the light guide plate 21 can be increased, and the area of the prior art in the first b diagram is solved. a problem of insufficient brightness. Since the probability that the light is reflected back to the area directly under the bump 230 is increased, the chance that the light finally passes through the inclined surface 230a is also considerably improved. Please refer to the second B diagram. The illustration of this part is used to show the possible optical path of the LEDs 2201 and 2202 after they are incident on the light guide plate 210. Taking the LED 2201 as an example, as described above, the light emitted by the LED 2201 has a divergence angle of about 120 degrees, that is, it is sandwiched between the optical path 1 and the optical path 4, and the light emitted by the LED 2202 is similar. The angle of divergence is approximately within the range of angles between the light control 7 and the optical path 10. Wherein, the light emitted along the optical path 1 and the optical path 4, after entering the light guide plate 21, can travel to the area directly under the bump 230 by the reflection of the moon b to the inclined surface 230a. The through surface 230a is emitted. 201017286 Therefore, the light emitted along the optical path 1 and the optical path 4 is transmitted along the optical path 2 and the optical path 5 after being reflected by the inclined surface 230a, and then reflected along the optical path through the bottom of the light guide plate 210. 3 and the optical path 6 are respectively transmitted through the inclined surface 230a of the two adjacent bumps 230. Similarly, the light emitted by the LED 2202 is also transmitted along the optical path 7 and the optical path 10, reflected by the inclined surface 230a, transmitted along the optical path 8 and the optical path 11, and then reflected by the bottom of the light guide plate 210 along the light. The diameter 9 and the optical path 12 are respectively emitted by the inclined surfaces 230a of the two adjacent bumps 230.
請參照第三A圖,其係本發明背光模組第二實施例之 示思圖。第一實施例之背光模組所包含的元件與第一實施 例所包含的元件大致上相同,因此第二實施例說明内容將 使用相同標號作為相同元件之標示。第二實施例同樣包括 一導光板210、複數個LED 220以及複數個凸塊230。 第二實施例之各個元件位置大致與第一實施例相同, 主要差異在於,凸塊230設置的位置,距離入光面S4尚有 一間隔距離H。亦即,設置在出光面S3上的凸塊230係朝 向離開入光面S4的方向移動’使得凸塊23Q其直立面 230b ’與導光板210其入光面S4之間,具有間隔距離h。 =外,此貫施例中,在導光板21〇的入光面S4,並製 作了^數個凹槽211,用以容納複數個⑽22〇。如 圖中所 不’母個LED 220正好散合於一個凹槽211 +。在較佳 貝她例中’所述凹槽211❸開口寬度大約等於哪 的,度使得LED 220 jl好能喪入凹槽211中。並且,對 光面S3上的凸塊23G而言,兩個相鄰凸塊230 間所夾的間隔距離,大約等於所述凹槽2ιι的寬度w,亦 201017286 即等於LED 220的寬度。如此一來’每一個LED 220正好 會位於兩個相鄰的凸塊230之間。此種設計,由於LED 220 的前端係嵌入導光板210的凹槽211中,因此,可以進一 步防止LED 220的發光逸漏。 請參照第三B圖’其係本發明背光模組第二實施例之 局部放大圖’用以顯示LED 220的光線在入射至導光板21〇 後其光線路徑的分佈情形。如圖所示,LED 2201沿著光徑 1以及光徑4射出的光線,經過斜面230a的反射,會沿著 ® 光控2以及光徑5行進’再經由導光板210底面的反射, 而沿著光徑3以及光徑6 ’分別由兩相鄰凸塊230的斜面 230a射出。同樣地,LED 2202沿著光徑7以及光徑1〇射 出的光線,經過斜面230a反射會沿著光徑8以及光徑11 行進,再經過導光板210底部的反射,而沿著光徑9以及 光控12,分別由兩相鄰凸塊23〇的斜面230a射出。 請參照第四A圖,其係本發明背光模組第三實施例之 示意圖。第三實施例之背光模組所包含的元件與第一實施 © 例所包含的元件大致上相同’因此第三實施例說明内容將 使用相同標號作為相同元件之標示。第三實施例同樣包括 一導光板210、複數個LED 220以及複數個凸塊23〇。 與第二實施例類似的,在第三實施例中,亦在導光板 210的入光面S4,製作複數個凹槽211,用以容納複數個 LED 220。同樣的,凹槽211的開口寬度w,大約等於led 220 的寬度,使得每一個LED 220正好能嵌入一個凹槽21丨中。 並且,兩個相鄰凸塊230間所夾的間隔距離,大約等於所 述凹槽211的開口寬度w,亦即等於LED 220的寬度,而 11 201017286 使每一個LED 220正好會位於兩個相鄰的凸塊23〇之間。 相較於第二實施例’在此實施例中,製作於導光板21〇 其入光面S4上的凹槽211會具有較深的深度,而使整個 LED 220此元全嵌入凹槽211中。換言之,凹槽2U的深 度1大約會等於1^220的長度,如此一來,當整個_22〇 肷入凹槽211時’ LED 220尾端的表面正好會與導光板 的入光面S4切齊。由於整個LED 22〇皆嵌入導弁】 的凹槽211中,因此,可以更進一步的防止LED 22〇其發 瘳 光漏浅。 此外’在此實施例中,凸塊230的長度會大於凹槽211 的深度L,亦即,大於整個LED 22〇的長度。如此一來, 由LED 220發出的光線,在入射至導光板21〇後的行進過 程中,仍然有機會被凸塊23〇的斜面230a所反射,而導入 凸塊230下方的導光板21〇中,並經過反射後,最終由斜 面230a _出。 珍請麵細B圖’其係本發明背細組第三實施例之 局。卩放大圖’用以顯示LED 220的光線在入射至導光板210 後其光線路控的分佈情形。如圖所示,LED 22〇1沿著光徑 1以及光徑4射出的光線,仍然有機會經過斜面23〇&的反 射,而沿著光徑2以及光徑5行進,再經由導光板21〇底 面的反射,沿著光徑3以及光徑6,分別由兩相鄰凸塊23〇 的斜面230a射出。同樣地,LED 2202沿著光徑7以及光 徑10射出的光線,經過斜面230a反射會沿著光徑8以及 光徑11行進,再經過導光板210底部反射而沿著光徑9 以及光徑12,分別由兩相鄰凸塊230的斜面230a射出。 12 201017286 本發明將凸塊230設置於導光板210之出光面%上, 並使其與複數個LED 220呈現交錯配置,如此一來,藉由 凸塊230其斜面230a,可使LED 220入射至導光板21〇的 的光線’在照射至斜面23〇a時,其反射光侷限在凸塊23〇 下方區域的機會增加。藉此,能相當程度的增加光線最終 由凸塊230其斜面230a射出的機會,進而解決第—B圖所 顯示習知技術中,相鄰LE:D 120之間光線無法通過所造成 的熱點現象,並大幅改善亮度不均的困擾。 本發明雖以較佳實例闡明如上,然其並非用以限定本 發明精神與發明實體僅止於上述實施例爾。對熟悉此項技 術者,當可料了触姻其它元件或方絲產生相同的 功效。是以,在不脫離本發明之精神與範圍内所作之修改, 均應包含在下述之申請專利範圍内。 【圖式簡單說明】 藉由以下詳細之描述結合所附圖示,將可輕易的了解 上述内谷及此項發明之諸多優點,其中: 第一A圖:習知技術側光式背光模組之示意圖; 第一B圖.習知技術侧光式背光模組之結構放大圖; 第二A圖:本發明背光模組第一實施例之示意圖; 第二B圖:本發明背光模組第一實施例之放大圖; 第二A圖:本發明背光模組第二實施例之示意圖; 第二B圖:本發明背光模組第二實施例之放大圖; 13 201017286 第四A圖:本發明背光模組第三實施例之示意圖,· 第四B圖:本發明背光模組第三實施例之放大圖。 【主要元件符號說明】 導光板:110、210 凹槽:211 LED : 120、220、2201、2202 凸塊:230斜面:230a直立面:23〇b 反射板:240 參 光線路徑:〇、P、Q、R、l、2、3、4、5、6、7、8、9、Please refer to FIG. 3A, which is a schematic diagram of a second embodiment of the backlight module of the present invention. The components included in the backlight module of the first embodiment are substantially the same as those of the first embodiment, and therefore the description of the second embodiment will be given the same reference numerals. The second embodiment also includes a light guide plate 210, a plurality of LEDs 220, and a plurality of bumps 230. The position of each element of the second embodiment is substantially the same as that of the first embodiment, and the main difference is that the position at which the bump 230 is disposed is still spaced apart from the light incident surface S4 by a distance H. That is, the bumps 230 provided on the light-emitting surface S3 are moved toward the direction away from the light-incident surface S4 such that the bumps 23Q have their upright faces 230b' and the light-incident surface S4 of the light guide plate 210 with a distance h. In addition, in this embodiment, in the light incident surface S4 of the light guide plate 21, a plurality of grooves 211 are formed to accommodate a plurality of (10) 22 turns. As shown in the figure, the mother LED 220 is exactly in a groove 211 +. In the preferred example, the groove 211 ❸ opening width is approximately equal to the degree, so that the LED 220 jl can be lost into the groove 211. Moreover, for the bump 23G on the smooth surface S3, the distance between the two adjacent bumps 230 is approximately equal to the width w of the groove 2 ι, and 201017286 is equal to the width of the LED 220. As a result, each of the LEDs 220 is located between two adjacent bumps 230. In this design, since the front end of the LED 220 is embedded in the recess 211 of the light guide plate 210, the light leakage of the LED 220 can be further prevented. Referring to FIG. 3B, a partial enlarged view of the second embodiment of the backlight module of the present invention is used to display the distribution of the light path of the light of the LED 220 after being incident on the light guide plate 21〇. As shown in the figure, the light emitted by the LED 2201 along the optical path 1 and the optical path 4, reflected by the inclined surface 230a, travels along the light control 2 and the optical path 5 and then passes through the reflection of the bottom surface of the light guide plate 210. The optical path 3 and the optical path 6' are respectively emitted by the inclined surfaces 230a of the two adjacent bumps 230. Similarly, the light emitted by the LED 2202 along the optical path 7 and the optical path 1 , is reflected along the optical path 8 and the optical path 11 through the inclined surface 230a, and then reflected by the bottom of the light guide plate 210, along the optical path 9 And the light control 12 is respectively emitted by the inclined surface 230a of the two adjacent bumps 23〇. Please refer to FIG. 4A, which is a schematic diagram of a third embodiment of the backlight module of the present invention. The components of the backlight module of the third embodiment are substantially the same as those of the first embodiment of the present invention. Therefore, the same reference numerals will be used for the description of the same components. The third embodiment also includes a light guide plate 210, a plurality of LEDs 220, and a plurality of bumps 23A. Similar to the second embodiment, in the third embodiment, a plurality of grooves 211 are also formed in the light incident surface S4 of the light guide plate 210 for accommodating a plurality of LEDs 220. Similarly, the opening width w of the recess 211 is approximately equal to the width of the led 220 such that each LED 220 fits into a recess 21丨. Moreover, the spacing between the two adjacent bumps 230 is approximately equal to the opening width w of the recess 211, that is, equal to the width of the LED 220, and 11 201017286 causes each LED 220 to be located in exactly two phases. Between the adjacent bumps 23〇. Compared with the second embodiment, in this embodiment, the groove 211 formed on the light-incident surface S4 of the light guide plate 21 has a deep depth, so that the entire LED 220 is completely embedded in the groove 211. . In other words, the depth 1 of the recess 2U is approximately equal to the length of 1^220, so that when the entire _22 is recessed into the recess 211, the surface of the end of the LED 220 is exactly aligned with the incident surface S4 of the light guide plate. . Since the entire LED 22 is embedded in the recess 211 of the lead, it is possible to further prevent the LED 22 from leaking light. Further, in this embodiment, the length of the bump 230 may be greater than the depth L of the recess 211, that is, greater than the length of the entire LED 22A. In this way, the light emitted by the LED 220 is still reflected by the inclined surface 230a of the bump 23〇 during the traveling after entering the light guide plate 21, and is introduced into the light guide plate 21 below the bump 230. And after being reflected, it is finally discharged by the inclined surface 230a_. The detail is shown in the figure B, which is the third embodiment of the present invention. The enlarged view ' is used to display the distribution of the light path control of the light of the LED 220 after being incident on the light guide plate 210. As shown in the figure, the light emitted by the LED 22〇1 along the optical path 1 and the optical path 4 still has the opportunity to pass the reflection of the inclined surface 23〇&, and travel along the optical path 2 and the optical path 5, and then through the light guide plate. The reflection of the bottom surface of the 21 , is emitted along the optical path 3 and the optical path 6, respectively, by the inclined surface 230a of the two adjacent bumps 23〇. Similarly, the light emitted by the LED 2202 along the optical path 7 and the optical path 10 is reflected along the optical path 8 and the optical path 11 through the inclined surface 230a, and then reflected by the bottom of the light guide plate 210 along the optical path 9 and the optical path. 12, respectively, is emitted by the inclined surface 230a of two adjacent bumps 230. 12 201017286 The present invention provides the bump 230 on the light-emitting surface % of the light guide plate 210 and is arranged in a staggered configuration with the plurality of LEDs 220. Thus, the LED 220 can be incident on the bump 230a by the bump 230. When the light ray of the light guide plate 21 is irradiated to the inclined surface 23〇a, the chance that the reflected light is confined to the region below the bump 23〇 increases. Thereby, the opportunity for the light to be finally emitted by the inclined surface 230a of the bump 230 can be increased to a certain extent, thereby solving the hot spot phenomenon caused by the inability of the light to pass between the adjacent LE:D 120 in the conventional technology shown in FIG. And greatly improve the problem of uneven brightness. The present invention has been described above by way of a preferred embodiment, and is not intended to limit the spirit of the invention and the inventive subject matter. Those skilled in the art will have the same effect when it comes to touching other components or square wires. Modifications made within the spirit and scope of the invention are intended to be included within the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The above-mentioned inner valley and many advantages of the invention can be easily understood by the following detailed description in conjunction with the accompanying drawings, in which: Figure 1A: conventional technology side-lit backlight module FIG. 2 is a schematic view showing the structure of the backlight module of the present invention; FIG. 2A is a schematic view showing the first embodiment of the backlight module of the present invention; FIG. 2 is a schematic view showing a second embodiment of the backlight module of the present invention; FIG. 2B is an enlarged view showing a second embodiment of the backlight module of the present invention; 13 201017286 FIG. 4A: A schematic diagram of a third embodiment of the invention, wherein: FIG. 4B is an enlarged view of a third embodiment of the backlight module of the present invention. [Main component symbol description] Light guide plate: 110, 210 Groove: 211 LED: 120, 220, 2201, 2202 Bump: 230 Bevel: 230a Upright: 23〇b Reflector: 240 Reference light path: 〇, P, Q, R, l, 2, 3, 4, 5, 6, 7, 8, 9,
10、11、12 出光面:S1、S3 入光面· S2、S4 光線無法涵蓋之區域:a 間隔距離:{J 間距:D10, 11, 12 illuminating surface: S1, S3 into the light surface · S2, S4 ray can not cover the area: a separation distance: {J spacing: D
凹槽寬度:W 凹槽深度:LGroove width: W Groove depth: L