1364604 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種背光模組及其應用，且特別是有 關於用以均勻出光之背光模組及其在顯示裝置上的應用。 【先前技術】 隨著資訊、通信產業不斷地推陳出新，帶動了液晶顯 示器（Liquid Crystal Display ; LCD)市場的蓬勃發展。液晶 顯示器具有尚畫質、體積小、重量輕、低驅動電壓、與低 消耗功率等優點，因此被廣泛應用於個人數位助理 (Personal Digital Assistant; PDA)、行動電話、攝錄放影機、 筆記型電腦、桌上型顯示器、車用顯示器、及投影電視等 消費性通訊或電子產品。加上積體電路（Integrated Circuit ; 1C)產業與液晶顯示器製造技術的突飛猛進，這些消費性通 訊或電子產品亦朝向輕、薄、短、小的趨勢發展。尤其是 在電腦產品方面，除了高性能、高速度之桌上型電腦外， 攜帶方便的筆記型電腦更是受到極大的注意與重視。 目前市場上常見之液晶顯示器大部分為背光型液晶顯 示器’這類的液晶顯示器一般主要係由前端之液晶顯示面 板以及後端之背光模組所組成。因此，背光模組為液晶顯 示器中相當關鍵之零組件之一。背光模組可依照光源入射 位置的不同分成側光式入光（Edge Lighting)與直下式入光 (Bottom Lighting)兩種，通常係運用於各種資訊、通訊、消 費產品之中，藉以提供上述產品的液晶顯示器（Liquid Crystal Display ’ LCD)—個面光源。 5 1364604 習知的背光模組常使用之光源例如有：冷陰極螢光燈 管（Cold Cathode Fluorescent Lamp ; CCFL)、熱陰極螢光燈 (Hot Cathode Fluorescent Lamp ; HCFL)、發光二極體 (Light-Emitting Diode ； LED)或電激發光片 (Electro-Luminescence; EL)等，由於冷陰極螢光燈管及熱 陰極榮光燈等線光源之體積較大，因此一般的手持示電子 產品遂採用體積較小的發光二極體、電激發光片等點光源 作為液晶顯示器的自發性的光源。 目刖，使用發光二極體的點光源背光模組係先利用紅 色、綠色以及藍色三原色的發光二極體來進行混光，藉以 形成白光後再加以出光。然而，由於發光二極體的光譜具 有單一高峰值的特性，因而當利用不同單色的發光二極體 來進行混光時，容易在出光後產生光色不均（c〇1〇rMura)的 情开>。另外，當進行混光時，需一特定混光距離來均勻混 光，因而增加背光模組的厚度。 【發明内容】 因此本發明之一方面係在於提供一種背光模組及其應 用，藉以使相同或不同的色光可充分混合並均勻出光，以 提供光色單一且均勻的背光源，減少光色不均的情形。 本發明之又一方面係在於提供一種背光模組及其應 用，藉以縮短混光距離，減少背光模組的厚度。 根據本發明之實施例，本發明之背光模組至少包含有 複數個光源和均光模組。均光模組係設置於此些光源上， 其中均光模組至少包含有聚光透鏡片和散光結構層。聚光 6 1364604 透鏡片係設置於此些光源上，用以聚集發光，散光結構層 係設置於聚光透鏡片上，用以發散由聚光透鏡片所穿過的 光線。 又，根據本發明之實施例，上述此些光源具有相同的 光色。 又，根據本發明之實施例，本發明之背光模組至少包 含有光源組㈣光模組。光源組設有複數個光源，均光模 、，且係置於光源組上，其中均光模組至少包含有聚光透鏡 片和散光結構層。聚光透鏡片係設置於光源組上，用以聚 集發光，散光結構層係設置於聚光透鏡片上，用以發散由 聚光透鏡片所穿過的光線。 又，根據本發明之實施例，上述背光模組係設置於液 晶顯示模組的下方，藉以形成一液晶顯示裝置。 因此，本發明之背光模組及其應用可提供光色單一且 均勻的產光源’並減少光色不均的情形。且本發明之背光 模組可減少光源的設置數量，降低整體成本。另外，本發 明之均光模級可縮短混光距離，減少背光模组的厚度。 【實施方式】 请參照第1圖和第2圖，第1圖係繪示依照本發明之 第實施例之邊光模組與液晶顯示模組的剖面示意圖，第2 圖係繪示依照本發明之第-實施例之背光模組未設有均光 模組和光學膜片組時的俯視示意圖。本實施例之背光模組 100較佳為直下式背光模組’其設置於一液晶顯示模組細 藉' I成液晶顯示裝置（Liquid Crystal Display ; 7 1364604 LCD) °背光模組100包含有殼體110、複數個光源12〇、均 光模組130及光學膜片組14〇。殼體11〇係用以承載此些光 源120、均光模組130及光學膜片組140。此些光源12〇係 用以發出至少二種不同顏色的色光’均光模組130係設置 於此些光源120上，用以均勻地混合此些光源12〇所發出 的色光’藉以避免背光模組100的出光具有光色不均（c〇1〇r Mura)之情形。光學膜片組14〇設置於均光模組13〇的上 方’以進行不同目的之光學改善動作。 如第1圖所示，本實施例之殼體11〇具有光出射口 ηι 和腔室112 ^光出射口 111係用以出光，在本實施例中，殼 體110可與均光模組13〇形成密閉結構之燈罩，用以避免 光線從光出射口 111以外的部分沒漏出去，其中殼體110 係由不透光材質所製成，例如：塑化材料、金屬材料或上 述材料之組合。腔室112係形成於殼體110的内部空間， 用以容置此些光源120。腔室112的内侧側壁112a可塗佈 有高反射率材質，例如金、銀、紹或上述材質之組合，用 以使一部分未正面射出的光線可反射至光出射口 U1。 如第1圖所示，本實施例之此些光源120例如為：冷 陰極螢光燈管（Cold Cathode Fluorescent Lamp ; CCFL)、熱 陰極螢光燈（Hot Cathode Fluorescent Lamp ; HCFL)、發光 二極體（Light-Emitting Diode ; LED)、有機發光二極體 (Organic Light Emitting Diode ; OLED)或電激發光片 (Electro-Luminescence ; EL)。此些光源120係排列設置於 殼體110的容室112中，用以朝光出射口 ill來發出至少 二種不同顏色的色光。 8 1364604 值得注得的是，上述之光源的排列方式僅為本發明的 一種實施方式，熟悉該領域之技術者可藉由各種不同的光 源的排列方式來達成相同功效，惟其背光模組結構及應用 皆不脫本發明之申請專利範圍所限。 凊參照第3圖至第5圖，第3圖係繪示依照本發明之 第一實施例之背光模組之均光模組的結構示意圖，其中第3 圖中在均光模組之左側圖形係繪示聚光透鏡片的底視圖， 而第3圖中在均光模組之右側圖形係繪示散光結構層的俯 視圖。第4圖係繪示依照本發明之第一實施例之背光模組 之聚光透鏡片的聚光動作示意圖，第5圖係繪示依照本發 明之第一實施例之背光模組之散光結構層的光發散動作示 意圖。本實施例之均光模組130至少包含有聚光透鏡片131 和散光結構層132。聚光透鏡片131係設置於此些光源12〇 上，用以聚集此些光源120所發出的光線，聚光透鏡片13ι 例如可為：三菱鏡片、菲涅耳（Fresnel)透鏡片或其任意組 合。散光結構層132係設置於聚光透鏡片131上，用以發 散由聚光透鏡片131所穿過的光線，在本實施例中，散光 結構層132可為陣列平凸透鏡片（或稱魚眼陣列透鏡片），以 發散光線。本實施例之光學膜片組140例如為：擴散片、 稜鏡片、增亮膜（Brightness Enhancement Film ; BEF)、反 射式增免膜（Dual Brightness Enhancement Film ; DBEF)、非 多層膜式反射偏光片（Diffused Reflective Polarizer Film; drpf)或上述之任意組合’其設置於均光模組13〇的上方， 用以使由均光模組130的出光可再進行不同目的之光學改 善動作。 Λ S> 9 1364604 當本實施例之背光模組100進行出光時，此些光源120 可分別發出不同色光’此時，不同色光可藉由均光模組130 的聚光透鏡片131來進行聚光動作，並形成混光效果，藉 以使不同的色光可混成單一色光，例如係使三原色（紅、綠 及藍）光混成一白光。由聚光透鏡片131所發出的光線係直 接射入散光結構層132’並藉由散光結構層132來進行發散 動作，以進一步發散光線，使光色均勻化，減少光色不均 的情形。1364604 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module and an application thereof, and more particularly to a backlight module for uniformly emitting light and its use on a display device. [Prior Art] With the continuous innovation of the information and communication industry, the market for liquid crystal display (LCD) has been booming. Liquid crystal displays have the advantages of good image quality, small size, light weight, low driving voltage, and low power consumption, so they are widely used in personal digital assistants (PDAs), mobile phones, video recorders, and notes. Consumer communications or electronic products such as computers, desktop displays, automotive displays, and projection televisions. Coupled with the rapid advancement of the integrated circuit (1C) industry and liquid crystal display manufacturing technology, these consumer communications or electronic products are also moving toward light, thin, short and small trends. Especially in computer products, in addition to high-performance, high-speed desktop computers, portable notebooks are greatly concerned and valued. Most of the liquid crystal displays currently on the market are backlight type liquid crystal displays. Liquid crystal displays such as the liquid crystal display panels of the front end are generally composed of a liquid crystal display panel at the front end and a backlight module at the rear end. Therefore, the backlight module is one of the most critical components in the liquid crystal display. The backlight module can be divided into two types: edge lighting and Bottom lighting according to the incident position of the light source. It is usually used in various information, communication and consumer products to provide the above products. Liquid Crystal Display 'LCD' - a surface light source. 5 1364604 Commonly used light sources for backlight modules are, for example, Cold Cathode Fluorescent Lamp (CCFL), Hot Cathode Fluorescent Lamp (HCFL), and Light Emitting Diode (Light) -Emitting Diode; LED) or Electro-Luminescence (EL), etc. Due to the large volume of cold cathode fluorescent lamps and hot cathode glory lamps, the volume of general hand-held electronic products is 遂A point light source such as a small light-emitting diode or an electro-active light sheet is used as a spontaneous light source of the liquid crystal display. It is seen that a point light source backlight module using a light-emitting diode first uses a light-emitting diode of three primary colors of red, green, and blue to perform light mixing, thereby forming white light and then emitting light. However, since the spectrum of the light-emitting diode has a single high peak characteristic, when light mixing is performed by using different monochromatic light-emitting diodes, it is easy to generate light color unevenness (c〇1〇rMura) after light-emitting. Love opens>. In addition, when mixing light, a specific mixing distance is required to uniformly mix light, thereby increasing the thickness of the backlight module. SUMMARY OF THE INVENTION Therefore, an aspect of the present invention is to provide a backlight module and an application thereof, so that the same or different color lights can be sufficiently mixed and uniformly emitted to provide a single and uniform backlight of light color, thereby reducing light color. The situation. Another aspect of the present invention is to provide a backlight module and an application thereof, thereby shortening the light mixing distance and reducing the thickness of the backlight module. According to an embodiment of the invention, the backlight module of the present invention comprises at least a plurality of light sources and a leveling module. The light homogenizing module is disposed on the light sources, wherein the light homogenizing module comprises at least a collecting lens sheet and a astigmatism structure layer. Concentrating 6 1364604 Lens sheets are disposed on the light sources for aggregating illumination, and the astigmatism structure layer is disposed on the concentrating lens sheets for diverging the light passing through the condensing lens sheets. Further, according to an embodiment of the present invention, the light sources described above have the same light color. Moreover, in accordance with an embodiment of the present invention, the backlight module of the present invention includes at least a light source group (four) optical module. The light source group is provided with a plurality of light sources, a light mode, and is placed on the light source group, wherein the light level module comprises at least a concentrating lens sheet and an astigmatism structure layer. The concentrating lens sheet is disposed on the light source group for collecting the illuminating light, and the astigmatism structure layer is disposed on the condensing lens sheet for diffusing the light passing through the condensing lens sheet. Moreover, according to an embodiment of the invention, the backlight module is disposed below the liquid crystal display module to form a liquid crystal display device. Therefore, the backlight module of the present invention and its application can provide a single and uniform light source of light color and reduce the unevenness of light color. Moreover, the backlight module of the present invention can reduce the number of light sources and reduce the overall cost. In addition, the uniform optical mode of the present invention can shorten the mixing distance and reduce the thickness of the backlight module. [Embodiment] Please refer to FIG. 1 and FIG. 2, and FIG. 1 is a cross-sectional view showing a side optical module and a liquid crystal display module according to a first embodiment of the present invention, and FIG. 2 is a schematic view of the present invention. The top view of the backlight module of the first embodiment is not provided with a planing module and an optical film set. The backlight module 100 of the present embodiment is preferably a direct-lit backlight module, which is disposed in a liquid crystal display module, and is provided with a liquid crystal display device (Liquid Crystal Display; 7 1364604 LCD). The body 110, the plurality of light sources 12A, the homogenizing module 130, and the optical film group 14A. The housing 11 is configured to carry the light source 120, the light homogenizing module 130, and the optical film group 140. The light source 12 is used to emit at least two different colors of color light. The light level module 130 is disposed on the light sources 120 for uniformly mixing the color lights emitted by the light sources 12 to avoid backlight patterns. The light emitted by the group 100 has a case where the light color is uneven (c〇1〇r Mura). The optical film group 14 is disposed above the uniform light module 13A to perform optical improvement operations for different purposes. As shown in FIG. 1 , the housing 11 本 of the present embodiment has a light exit opening ηι and a chamber 112 ^ light exit opening 111 for emitting light. In this embodiment, the housing 110 and the homogenizing module 13 can be used. The lampshade is formed into a closed structure to prevent light from leaking out of the light exit opening 111. The housing 110 is made of an opaque material such as a plasticized material, a metal material or a combination of the above materials. . The chamber 112 is formed in an inner space of the housing 110 for accommodating the light sources 120. The inner side wall 112a of the chamber 112 may be coated with a high reflectivity material such as gold, silver, or a combination of the above materials to allow a portion of the light that is not emitted from the front side to be reflected to the light exit opening U1. As shown in FIG. 1, the light sources 120 of this embodiment are, for example, a Cold Cathode Fluorescent Lamp (CCFL), a Hot Cathode Fluorescent Lamp (HCFL), and a light emitting diode. Light-Emitting Diode (LED), Organic Light Emitting Diode (OLED) or Electro-Luminescence (EL). The light sources 120 are arranged in the chamber 112 of the housing 110 for emitting at least two different colors of color light toward the light exit opening ill. 8 1364604 It is worth noting that the arrangement of the above-mentioned light sources is only one embodiment of the present invention. Those skilled in the art can achieve the same effect by different arrangement of light sources, but the structure of the backlight module and The application is not limited by the scope of the patent application of the present invention. Referring to FIG. 3 to FIG. 5, FIG. 3 is a schematic structural view of a homogenizing module of a backlight module according to a first embodiment of the present invention, wherein the third figure is on the left side of the homogenizing module. The bottom view of the concentrating lens sheet is shown, and the figure on the right side of the homogenizing module in Fig. 3 shows the top view of the astigmatism structure layer. 4 is a schematic view showing a condensing action of a condensing lens sheet of a backlight module according to a first embodiment of the present invention, and FIG. 5 is a astigmatism structure of a backlight module according to a first embodiment of the present invention. Schematic diagram of the light divergence action of the layer. The homogenizing module 130 of the embodiment includes at least a collecting lens sheet 131 and a astigmatism structure layer 132. The condensing lens sheet 131 is disposed on the light sources 12A for collecting the light emitted by the light sources 120. The condensing lens sheet 13ι can be, for example, a Mitsubishi lens, a Fresnel lens sheet or any of them. combination. The astigmatism structure layer 132 is disposed on the condensing lens sheet 131 for diverging the light passing through the condensing lens sheet 131. In this embodiment, the astigmatism structure layer 132 may be an array of plano-convex lens sheets (or fisheye lenses). Array lens) to diverge light. The optical film set 140 of the present embodiment is, for example, a diffusion sheet, a silicon sheet, a brightness enhancement film (BEF), a dual brightness enhancement film (DBEF), and a non-multilayer film reflection polarizer. (Diffused Reflective Polarizer Film; drpf) or any combination of the above is disposed above the light homogenizing module 13A for optically improving the light output by the homogenizing module 130 for different purposes. Λ S> 9 1364604 When the backlight module 100 of the present embodiment emits light, the light sources 120 can respectively emit different colors of light. At this time, different color lights can be collected by the collecting lens 131 of the homogenizing module 130. The light acts and forms a light mixing effect, so that different color lights can be mixed into a single color light, for example, the three primary colors (red, green, and blue) light are mixed into one white light. The light emitted from the condensing lens sheet 131 is directly incident on the astigmatism structure layer 132' and is diverged by the astigmatism structure layer 132 to further diverge the light, thereby uniformizing the light color and reducing the unevenness of the light color.
言月參照第6A圖至第6C圖，第6A圖係繪示依照本發 明之第一實施例之單一平凸透鏡結構的立體示意圖，第6b 圖係繪示依照本發明之第一實施例之沿著Α·Α，剖面線所形 成之剖面示意圖，第6C圖係繪示依照本發明之第一實施例 之/〇著B-B剖面線所形成之剖面示意圖。值得注意的是， 當均光模組130的散光結構層132例如為陣列平凸透鏡 片，且應用於顯示器中時，由於一般顯示器（未繪示）的長寬 比例約為16 . 9或4 : 3 ’亦即顯示器的在橫向上的尺寸大 於在縱向上的尺寸，此時’可藉由提高每—平凸透鏡結構 132a在預设方向上的曲率來進一步均勻化整體出光效 果例如陣列平凸透鏡片中之每一平凸透鏡結構132a在橫 向著B-B剖面線的方向）上的曲率可大於在縱向（沿著 剖面線的方向）上的曲率’藉以提升橫向的光發散效 里’因而可進一步均勻背光模組對於整體顯示器的出光效 :光Si因顯示器的長寬™同，而產生不均勻的 因此’本實施例之背光模組及其應用可均勻地混光和 10 1364604 出光，以減少光色不均的情形。相較於習知背光模組需增 加混光距離或光源㈣置數量來均勻混光，本實施例之背 光模組可藉由均光模組13〇來進行均句地混光和發散光 譜’因而可大幅縮短混光距離，並可減少光源的設置數量， 減少背光模組100的厚度。 、清參照帛7 ®，其繪示依照本發明之第二實施例之背 光模組的刮面示意圖。以下僅就本實施例與第一實施例之 相異處進行說明，關於相似處在此不再贅述。相較於第一 實施例，第二實施例之複數個光源320係發出相同的光色， 例如為複數個單色發光二極體。此時，光線可藉由均光模 組130來進行聚光動作和發散動作，以均勻化分別由此些 光源320所發出的光線，避免出光不均（Mura)的情形。 3月參照第8A圖至第8C圖’第8A圖係繪示依照本發 明之第二實施例之背光模組之單一光源組的結構示意圖， 第8B圖係繪示依照本發明之第三實施例之背光模組的俯 視示意圖，第8C圖係繪示依照本發明之第一實施例之沿著 C_ C剖面線所形成之剖面示意圖。以下僅就本實施例與第 一實施例之相異處進行說明，關於相似處在此不再贅述。 相較於第一實施例’第三實施例之背光模組100具有複數 光源組420’其可設置於殼體110的腔室112中。光源組 420設有基板421和複數個光源422，此些光源422係排列 設置於基板421 (例如為圓形基板）上，而此些光源422發出 的光色可以係相同的或不相同的。此時，第三實施例之背 光模組100設有複數個均光模組430，每一此些均光模組 430係對應地設置於每+ —此些光源組420上。當此些光源 1364604 422發出的光色為相同時，均光模組430可均句化光源組 420的出光，使光源組420可均勻發光，而無發光不均的= . 形。當此些光源422發出的光色為不同時，均光模組43〇 可先均勻地進行混光，並發散光線的光譜，使單一光源組 420可發出光色單一且均勻的光線。值得注意的是此時， 均光模組430的聚光透鏡片431例如可為：三菱鏡片、菲 涅耳（Fresnd)透鏡片或其任意組合，而散光結構層432可例 如為：陣列平凸透鏡片（或稱魚眼陣列透鏡片）或擴散層。 • 又，在本實施例中，此些光源422可為複數個發光二 極體，並可發出三原色（紅、綠及藍）的色光，藉以混色來發 出白光。此時，由於一般綠光發光二極體的發光效果較差， 此些發光二極體的排列設置可為紅-綠_綠_藍（RGGB)，藉以 增加設置綠光發光二極體來混成白光。 明參照第9圖，其繪示依照本發明之第四實施例之背 光模組的剖面示意圖。以下僅就本實施例與第三實施例之 相異處進行說明，關於相似處在此不再贅述。相較於第三 • 實施例，第四實施例之背光模組100具有複數個光源組 520，其可排列設置於殼體11〇的腔室112中此時，第四 實施例之均光模組530係共同地設置於此些光源組52〇 上。光源組520設有基板521和複數個光源522，此些光源 522發出的光色可以係相同的或不相同的。當此些光源 發出的光色為相同時，均光模組53〇可均勻此些光源組52〇 的出光，使背光模組1 〇〇可均勻出光，而無出光不均（Mura) 的情形。當此些光源522發出的光色為不同時，均光模組 530可均勻地進行混光，並發散光線的光譜，因而本實施例 C S> 12 1364604 之背光模組100可提供光色單一且均勻的背光源。 由上述本發明的實施例可知，本發明之背光模組及其 應用可均勻地混光和出光，以發出光色單一且均勻的光 線，且可減少光色不均的情形。另外，由於光線可得到充 分利用，因而可減少光源的設置數量，降低整體成本。再 者，本發明之均光模組可均勻地進行混光和發散光譜，以 縮短混光距離，減少背光模組的厚度。 雖然本發明已以實施例揭露如上，然其並非用以限定 本發明，任何熟習此技藝者，在不脫離本發明之精神和範 圍内，當可作各種之更動與潤飾，因此本發明之保護範圍 當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之詳細說明如下： 第1圖係依照本發明之第一實施例之背光模組與液晶 顯示模組的剖面示意圖。 第2圖係繪示依照本發明之第一實施例之背光模組未 設有均光模組和光學膜片組時的俯視示意圖。 第3圖係繪示依照本發明之第一實施例之背光模組之 均光模組的結構示意圖。 第4圖係繪示依照本發明之第一實施例之背光模組之 聚光透鏡片的聚光動作示意圓。 第5圖係緣示依照本發明之第一實施例之背光模組之 散光結構層的光發散動作示意圖。 S-> 13 1364604 第6A圖係繪示依照本發明之第一實施例之單一平凸 透鏡結構的立體示意圖。 第6B圖係繪示依照本發明之第一實施例之沿著Ay 剖面線所形成之剖面示意圖。 第6C圖係繪不依照本發明之第一實施例之沿著B y 剖面線所形成之剖面示意圖。 第7圖係繪示依照本發明之第二實施例之背光模組的 剖面示意圖。 第8A圖係繪示依照本發明之第三實施例之背光模組 之單一光源組的結構示意圖。Referring to FIGS. 6A to 6C, FIG. 6A is a perspective view showing a single plano-convex lens structure according to a first embodiment of the present invention, and FIG. 6b is a view showing a first embodiment according to the present invention.剖面·Α, a schematic cross-sectional view formed by a hatching, and FIG. 6C is a schematic cross-sectional view taken along line BB of the first embodiment of the present invention. It is to be noted that when the astigmatism structure layer 132 of the homogenizing module 130 is, for example, an array of plano-convex lens sheets, and is applied to a display, since the aspect ratio of the general display (not shown) is about 16.9 or 4: 3 'that is, the size of the display in the lateral direction is larger than the dimension in the longitudinal direction, at which time 'the overall light-emitting effect can be further uniformed by increasing the curvature of each of the plano-convex lens structures 132a in a predetermined direction, such as an array of plano-convex lens sheets. The curvature of each of the plano-convex lens structures 132a in the direction transverse to the BB section line can be greater than the curvature in the longitudinal direction (the direction along the section line) to enhance the lateral light divergence effect and thus further uniform the backlight mode The light output effect of the whole display is as follows: the light Si is uneven due to the length and width TM of the display, so the backlight module of the embodiment and the application thereof can uniformly mix light and 10 1364604 light to reduce the light color. The situation. Compared with the conventional backlight module, it is necessary to increase the light mixing distance or the number of light sources (four) to uniformly mix the light. The backlight module of the embodiment can perform the uniform mixed light and divergence spectrum by the uniform light module 13〇. Therefore, the light mixing distance can be greatly shortened, the number of light sources can be reduced, and the thickness of the backlight module 100 can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 7 is a schematic view showing a shaving surface of a backlight module according to a second embodiment of the present invention. Only the differences between the embodiment and the first embodiment will be described below, and the details are not described herein again. Compared to the first embodiment, the plurality of light sources 320 of the second embodiment emit the same color of light, for example, a plurality of monochromatic light-emitting diodes. At this time, the light can be concentrated and diverged by the uniform mode group 130 to homogenize the light emitted by the light sources 320, thereby avoiding the light unevenness (Mura). Referring to FIG. 8A to FIG. 8C, FIG. 8A is a schematic structural view showing a single light source group of a backlight module according to a second embodiment of the present invention, and FIG. 8B is a third embodiment of the present invention. FIG. 8C is a schematic cross-sectional view of the backlight module according to the first embodiment of the present invention, taken along the line C_C. In the following, only the differences between the embodiment and the first embodiment will be described, and the similarities will not be described herein. The backlight module 100 of the third embodiment as compared with the first embodiment has a plurality of light source groups 420' which can be disposed in the chamber 112 of the housing 110. The light source group 420 is provided with a substrate 421 and a plurality of light sources 422. The light sources 422 are arranged on the substrate 421 (for example, a circular substrate), and the light colors emitted by the light sources 422 may be the same or different. At this time, the backlight module 100 of the third embodiment is provided with a plurality of uniform light modules 430, and each of the uniform light modules 430 is correspondingly disposed on each of the light source groups 420. When the light colors emitted by the light sources 1364604 422 are the same, the light homogenizing module 430 can uniformly illuminate the light of the light source group 420, so that the light source group 420 can uniformly emit light without uneven illumination. When the light colors emitted by the light sources 422 are different, the light-receiving module 43 均匀 can uniformly mix the light and diverge the spectrum of the light, so that the single light source group 420 can emit a single and uniform light of the light color. It should be noted that the condensing lens sheet 431 of the homogenizing module 430 can be, for example, a Mitsubishi lens, a Fresnel lens sheet or any combination thereof, and the astigmatic structure layer 432 can be, for example, an array plano-convex lens. A sheet (or fisheye array lens sheet) or a diffusion layer. • In this embodiment, the light sources 422 can be a plurality of light emitting diodes and can emit color lights of three primary colors (red, green, and blue) to generate white light by mixing colors. At this time, since the general green light emitting diode has a poor light emitting effect, the arrangement of the light emitting diodes may be red-green_green_blue (RGGB), thereby increasing the setting of the green light emitting diode to mix white light. . Referring to Figure 9, a cross-sectional view of a backlight module in accordance with a fourth embodiment of the present invention is shown. In the following, only the differences between the embodiment and the third embodiment will be described, and the similarities are not described herein again. Compared with the third embodiment, the backlight module 100 of the fourth embodiment has a plurality of light source groups 520, which can be arranged in the chamber 112 of the housing 11 此时 at this time, the uniform mode of the fourth embodiment. Groups 530 are commonly disposed on the light source groups 52A. The light source group 520 is provided with a substrate 521 and a plurality of light sources 522, and the light colors emitted by the light sources 522 may be the same or different. When the light colors emitted by the light sources are the same, the light-receiving module 53 can evenly discharge the light from the light source groups 52, so that the backlight module 1 can uniformly emit light without the uneven light emission (Mura). . When the light colors emitted by the light sources 522 are different, the light homogenizing module 530 can uniformly mix light and diverge the spectrum of the light, so that the backlight module 100 of the embodiment C S> 12 1364604 can provide a single light color. And a uniform backlight. It can be seen from the above embodiments of the present invention that the backlight module of the present invention and the application thereof can uniformly mix and emit light to emit a single and uniform light line of light color, and can reduce the uneven color of light. In addition, since the light can be fully utilized, the number of light sources can be reduced and the overall cost can be reduced. Furthermore, the homogenizing module of the present invention can uniformly perform the mixing and diverging spectrum to shorten the mixing distance and reduce the thickness of the backlight module. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and retouched without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; A schematic cross-sectional view of a backlight module and a liquid crystal display module. 2 is a top plan view showing a backlight module according to a first embodiment of the present invention without a uniform light module and an optical film set. 3 is a schematic structural view of a homogenizing module of a backlight module according to a first embodiment of the present invention. Fig. 4 is a view showing a condensing action schematic circle of a condensing lens sheet of a backlight module according to a first embodiment of the present invention. Figure 5 is a schematic view showing the light diverging action of the astigmatic structure layer of the backlight module in accordance with the first embodiment of the present invention. S-> 13 1364604 Fig. 6A is a perspective view showing a single plano-convex lens structure in accordance with a first embodiment of the present invention. Figure 6B is a schematic cross-sectional view taken along the Ay section line in accordance with the first embodiment of the present invention. Figure 6C is a schematic cross-sectional view taken along line B y of the first embodiment of the present invention. Figure 7 is a cross-sectional view showing a backlight module in accordance with a second embodiment of the present invention. 8A is a schematic structural view showing a single light source group of a backlight module according to a third embodiment of the present invention.
的俯視示意圖。A schematic view of the top.
剖面線所形成之剖面示意圖。 第9圖係繪示依照本發明之第四實施例之背光模組的 剖面示意圖。 【主要元件符號說明】 100 :背光模組 111 :光出射口 112a :内側側壁 130 :均光模組 132 :散光結構層 140 :光學膜片組 200 :液晶顯示模組 110 :殼體 112 :腔室 120 :光源 131 :聚光透鏡片 132a :平凸透鏡結構 320 :光源 1364604 420 ： 光源組 421 ： 基板 422 ： 光源 430 ： 均光模組 431 ： 聚光透鏡片 432 ： 散光結構層 520 ： 光源組 521 ： 基板 522 ： 光源 530 ： 均光模組A schematic view of a section formed by a section line. Figure 9 is a cross-sectional view showing a backlight module in accordance with a fourth embodiment of the present invention. [Main component symbol description] 100: backlight module 111: light exit port 112a: inner side wall 130: uniform light module 132: astigmatic structure layer 140: optical film set 200: liquid crystal display module 110: housing 112: cavity Room 120: light source 131: concentrating lens sheet 132a: plano-convex lens structure 320: light source 1364604 420: light source group 421: substrate 422: light source 430: homogenizing module 431: concentrating lens sheet 432: astigmatic structure layer 520: light source group 521 : substrate 522 : light source 530 : uniform light module
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