1332273 九、發明說明： 【發明所屬之技術領域】 ， 本發明涉及一種發光二極管，及採用該發光二極管之發光二極管模組 . 及直下式發光二極管背光系統。 【先前技術】 • 目刖’然自發光性質的液晶材料(Liquid Crystal)已廣泛應用於如電 視、電腦螢幕、液晶投影、行動電話及個人數位助理（Pers〇nal Digital1332273 IX. Description of the Invention: [Technical Field] The present invention relates to an LED, an LED module using the LED, and a direct-lit LED backlight system. [Prior Art] • Liquid crystals that have been shown to be self-illuminating have been widely used in applications such as television, computer screens, liquid crystal projection, mobile phones, and personal digital assistants (Pers〇nal Digital).
Assistants, PDA)等不同尺寸的液晶顯示器（Liquid Crystal Displays, LCD) 上，而為達到顯像之目的，必須搭配光源照射液晶。由於光源一般置於液 φ 晶面板之後，乃稱為背光源，而此面板之後包含光源的所有元件總成則稱 為背光系統。背光系統包括背光源及其光學元件，依背光源之位置的不同， 背光系統一般可分為側光式（Edge Lighting)及直下式(Bottom Lighting) 兩種。 於背光系統設計中，背光源種類的選擇及其結構設計係一重要環節。 參見任洪文等人於文獻《液晶通訊》第2卷，1994年第1期之“液晶顯示 器的背光源一文，液晶顯示對背光源之性能要求有：高亮度、光源色度 - 及色溫可調、低功耗、長壽命等等。 ， 參見第一圖，其為先前技術中採用冷陰極螢光燈（c〇ld cathode Fluorescent Lamp, CCFL)作為背光源之直下式背光系統結構。該背光系統 • 10包括：一反射腔11，其具有一反射邊牆及一反射底面；複數位於反射底 面之冷陰極螢光燈12，其排列方式如第二圖所示；一擴散板13，其位於反 射腔11之上並與上述反射底面完全平行，光自反射腔u射出後藉由擴散 板13將線光源變更為面光源，使光線分佈變得更均勻；及位於擴散板u 上順序排列之擴散片14,集光片15及反射式偏光增亮膜16(Dual Brightness enhancement Film，DBEF) ’其主要作用係修正由擴散板13射 出光線之方向，提高正面輝度及光學利用率等。 惟，採用冷陰極螢光燈作為背光源，其功耗較大、亮度均一性及白光 純度不佳、成本較南》因此難以滿足液晶顯示之高質量等發展需求。目前， 大功率發光二極管(High Power Light-emitting Diode，簡稱 High power 6 1332273 ^ ^度、低功耗、長壽命等優點；因而被用作液晶顯示之背光源 功走^國專利第6,614,179號及第6,686,69丨號，其揭示一種白光大 極官’其於發光二齡以⑽_部分涂覆奸可紐材料，如 藉由發光二極管別發出藍光、料光 '或其它腕統發其上 面^之光可激發材料而發白H白光發光二極管之白絲貌確定， 且色溫；故難以根據實際需要變更其色度及其色溫。 …目^ ’主要以聊(红綠藍）昆光產生白光來取代冷陰極營光燈白光作背 光原參見第—圖’其為先前技術巾採用大功率發光二極管陣列作為背光 敎背光系統結構i背光系統2〇包括：—反射腔21，其具有—反射邊牆 及一反射底面；一位於反射底面之由複數大功率發光二極管模組22形成之 發光陣列，其排列方式如第四圖所示；一擴散板23，其位於反射腔21之上 並與上述反射底面完全平行；及位於擴散板23上順序排列之擴散片24，集 光片 25 及反射式偏光增亮膜 26(Dual Brightness enhancement Film，' DBEF)其中，母個大功率發光二極管模組22均由複數大功率二極管220 ’且5而成，藉由RGB二色混合產生白光；而每個大功率發光二極管220之 外型如第五圖所示。該大功率發光二極管220係由基底221，光學鏡片223， 及位於基底221上、光學鏡片223内之發光二極'管晶片222構成（參見第六 圖）。由於其所採用之光學鏡片223之匯聚作用，導致發光二極管點光源之 中^*冗度較大，而邊緣冗度過小（參見第七圖）。因而，將其應用於背光系 統，於RGB三色混合時，將產生單點光源亮點現象，導致其所產生之白光 純度及亮度均一性不佳；進而使得液晶顯示質量不高。 有鑑於此，有必要提供一具有白光純度及亮度均一性高之背光系統。 【發明内容】 下面將以若干實施例說明一種背光系統，其具有白光純度及亮度均一 性高之優點。 為實現上述内容，提供一種發光二極管，其包括： 一基底； 一位於該基底上之漏斗狀光學鏡片’該漏斗狀光學鏡片包括一第一開 口及一第二開口，該第一開口與上述基底結合在一起，該第二開口遠 7 1332273 離上述基底且直徑較該第一開口大;及 -位於上述基底之被該L包圍之部分之發光二極管晶片其與 該基底電性連接。 優選的，所述漏斗狀光學鏡片之内表面具有複數微結構。 更優選的，所述微結構包括環繞該内表面之階梯結構。 以及，提供一發光二極管模組，其包括： 複數紅'綠、藍發光二極管； 其中’該複數红'綠、藍發光二極管以一定之組合方式排列以產生白 光’並且’每個發光二極管包括：Assistants, PDAs, etc., on different sizes of liquid crystal displays (LCDs), and for the purpose of imaging, the liquid crystal must be illuminated with a light source. Since the light source is usually placed behind a liquid crystal panel, it is called a backlight, and all component assemblies including the light source after this panel are called backlight systems. The backlight system includes a backlight and its optical components. The backlight system can be generally classified into two types: edge lighting and Bottom Lighting. In the backlight system design, the choice of backlight type and its structural design are an important part. See Ren Hongwen et al. in the literature "Liquid Crystal Communications" Volume 2, 1994, No. 1, "The backlight of liquid crystal displays, the performance requirements of liquid crystal display for backlights are: high brightness, light source chromaticity - and color temperature adjustable, Low power consumption, long life, etc. See the first figure, which is a direct-lit backlight system structure using a c〇ld cathode Fluorescent Lamp (CCFL) as a backlight in the prior art. 10 includes: a reflective cavity 11 having a reflective sidewall and a reflective bottom surface; a plurality of cold cathode fluorescent lamps 12 on the reflective bottom surface arranged in a second pattern; a diffusion plate 13 located in the reflective cavity 11 is parallel to the reflective bottom surface, and the light is emitted from the reflective cavity u, and then the light source is changed into a surface light source by the diffusion plate 13 to make the light distribution more uniform; and the diffusion sheet sequentially arranged on the diffusion plate u 14, the light concentrating sheet 15 and the reflective brightness enhancing film 16 (Dual Brightness enhancement film, DBEF) 'the main function is to correct the direction of the light emitted by the diffusing plate 13, to improve the front luminance and optical utilization. However, cold cathode fluorescent lamps are used as backlights, which have large power consumption, uniform brightness, poor white light purity, and relatively low cost. Therefore, it is difficult to meet the development needs of high quality liquid crystal displays. Currently, high power LEDs (High Power Light-emitting Diode, referred to as High power 6 1332273 ^ ^ degree, low power consumption, long life, etc.; thus it is used as a backlight for liquid crystal display, the national patents 6,614,179 and 6,686,69 丨It reveals a white light singularity's light-emitting two-year-old (10) _ partially coated traits, such as light-emitting diodes that emit blue light, light-lighted or other wrists that emit light on them. The white appearance of the white H light-emitting diode is determined, and the color temperature; therefore, it is difficult to change its chromaticity and color temperature according to actual needs. ... ^ ^ Mainly to chat (red, green and blue) Kunguang to produce white light instead of cold cathode camp The light white light is used as the backlight. See the first figure. It is a prior art towel using a high-power LED array as a backlight. The backlight system structure i backlight system includes: - a reflective cavity 21, which has - a side wall and a reflective bottom surface; a light-emitting array formed by the plurality of high-power LED modules 22 on the bottom surface of the reflection, arranged in a fourth manner; a diffusion plate 23 located on the reflective cavity 21 and associated with The reflective bottom surface is completely parallel; and the diffusion sheet 24, the light collecting sheet 25 and the reflective polarizing brightness enhancement film 26 (Dual Brightness Enhancement Film, 'DBEF) which are sequentially arranged on the diffusion plate 23, and the mother high power LED module 22 is formed by a plurality of high-power diodes 220' and 5, and white light is generated by RGB two-color mixing; and each high-power LED 220 is shaped as shown in FIG. The high power light emitting diode 220 is composed of a substrate 221, an optical lens 223, and a light emitting diode 'tube wafer 222 on the substrate 221 and in the optical lens 223 (see the sixth drawing). Due to the convergence of the optical lenses 223 used, the light source of the LEDs is more redundant and the edge redundancy is too small (see Figure 7). Therefore, when it is applied to the backlight system, when the RGB three colors are mixed, a single point light source phenomenon will be generated, resulting in poor white light purity and brightness uniformity, and the liquid crystal display quality is not high. In view of this, it is necessary to provide a backlight system having high white light purity and uniform brightness. SUMMARY OF THE INVENTION A backlight system having advantages of high white light purity and high brightness uniformity will be described below by way of several embodiments. To achieve the above, a light emitting diode is provided, comprising: a substrate; a funnel-shaped optical lens on the substrate; the funnel-shaped optical lens includes a first opening and a second opening, the first opening and the substrate In combination, the second opening is far from the substrate and is larger in diameter than the first opening; and the LED chip located in the portion of the substrate surrounded by the L is electrically connected to the substrate. Preferably, the inner surface of the funnel-shaped optical lens has a plurality of microstructures. More preferably, the microstructures comprise a stepped structure surrounding the inner surface. And, an LED module is provided, comprising: a plurality of red' green and blue light emitting diodes; wherein 'the plurality of red' green and blue light emitting diodes are arranged in a certain combination to generate white light' and each of the light emitting diodes comprises:
一基底； 一位於該基底上之漏斗狀光學鏡片，該漏斗狀光學鏡片包括一第一開 口及一第二開口，該第一開口與上述基底結合在一起，該第二開口遠 離上述基底且直徑較該第一開口大；及 一位於上述基底之被該第一開口包圍之部分之發光二極管晶片，直盘 該基底電性連接。 所述發光二極管之排列方式為線性排列。 優選的，所述線性排列包括 GRBRG，RGBGR，GRfeBRG，RGBBGR，GRBGGBRG， GRBBRGGRB線性排列；其中’ G代表綠光發光二極管，R代表红光發光二極 管，B代表藍光發光二極管。a substrate; a funnel-shaped optical lens on the substrate, the funnel-shaped optical lens comprising a first opening and a second opening, the first opening being combined with the substrate, the second opening being away from the substrate and having a diameter And being larger than the first opening; and a light-emitting diode chip located on a portion of the substrate surrounded by the first opening, the substrate is electrically connected. The arrangement of the light emitting diodes is linear. Preferably, the linear arrangement comprises GRBRG, RGBGR, GRfeBRG, RGBBGR, GRBGGBRG, GRBBRGGRB linear arrangement; wherein 'G represents a green light emitting diode, R represents a red light emitting diode, and B represents a blue light emitting diode.
更優選的，所述線性排列中之相鄰兩個發光二極管之中心之距離為 9刪。 可選的，所述發光二極管之排列方式為圓環形排列。 優選的，所述圓環形排列之中心具有一發光二極管。 以及，提供一背光系統’其包括： 一反射腔’其具有一反射邊牆及一反射底面； 複數紅'綠、藍發光二極管，其按一定之組合方式規則排佈於上述反 射底面上； 一位於上述反射腔上之擴散片；及 8 1332273 /位於上述擴散片上之集光片； 其中，所述發光二極管包括：. 一基底； 一位於該基底上之漏斗狀光學鏡片，該漏斗狀光學鏡片包括一第一開 口及一第二開口，該第一開口與上述基底結合在一起，該第二開口遠 離上述基底且直徑較該第一開口大：及 /位於上述基底之被該第一開口包圍之部分之發光二極管晶片，其與 該基底電性連接。 所述背光系統還包括一增亮膜，其位於上述集光片之上。 所述複數红、綠、藍發光二極管係以一發光二極管模組為單元，複數 該發光二極管模組以矩陣方式排佈於上述反射底面。 優選的，所述發光二極管模組中之發光二極管係線性排列。 更優選的，所述線性排列中之相鄰兩個發光二極管之中心之距離為 9咖。 可選的’所述發光二極管模組中之發光二極管係圓環形排列。 優選的’所述圓環形排列之中心具有一發光二極管。 優選的’所述漏斗狀光學鏡片之内表面具有·複數微結構。 更優選的，所述微結構包括環繞該内表面之階梯結構。 相對於先前技術’本技術方案所提供之發光二極管，藉由其光學鏡片 之變更’採用漏斗狀結構，可消除單點光源亮度現象，其各個輻射角度之 亮度較均勻；採用該發光二極管組合之發光二極管模組，其藉由RGB三色 發光二極管混光，可獲得白光純度高、亮度均勻之面光源，且色度及色溫 可調；將該發光二極管按一定組合方式規則排佈，並將其應用於背光系統， 其可實現較佳之亮度均勻性且白光純度高。 【實施方式】 下面結合附圖將對本發明實施例作進一步之詳細說明。 參見第八圖及第九圖，本發明第一實施例所提供之發光二極管3〇可產 生红 '綠、藍三色光，其包括一基底31，一發光二極管晶片32，及一光學 鏡片33。其中，發光二極管晶片32位於基底31之上，並與基底31電性連接， 9 1332273More preferably, the distance between the centers of two adjacent ones of the linear arrays is 9 sec. Optionally, the light emitting diodes are arranged in a circular arrangement. Preferably, the center of the circular array has a light emitting diode. And providing a backlight system comprising: a reflective cavity having a reflective sidewall and a reflective bottom surface; a plurality of red 'green and blue light emitting diodes arranged in a certain combination on the reflective bottom surface; a diffuser on the reflective cavity; and 8 1332273 / a light collecting sheet on the diffusing sheet; wherein the light emitting diode comprises: a substrate; a funnel-shaped optical lens on the substrate, the funnel-shaped optical lens The first opening and the second opening are combined, the first opening is coupled to the substrate, the second opening is away from the substrate and has a larger diameter than the first opening: and/or the substrate is surrounded by the first opening A portion of the LED chip is electrically connected to the substrate. The backlight system also includes a brightness enhancement film positioned over the light concentrating sheet. The plurality of red, green and blue light emitting diodes are arranged by a light emitting diode module, and the plurality of light emitting diode modules are arranged in a matrix on the reflective bottom surface. Preferably, the light emitting diodes in the LED module are linearly arranged. More preferably, the distance between the centers of two adjacent light emitting diodes in the linear arrangement is 9 coffee. The light-emitting diodes in the optional LED module are arranged in a circular shape. Preferably, the center of the circular array has a light emitting diode. Preferably, the inner surface of the funnel-shaped optical lens has a complex microstructure. More preferably, the microstructures comprise a stepped structure surrounding the inner surface. Compared with the prior art 'the light-emitting diode provided by the technical solution, the change of the optical lens' adopts a funnel-like structure, which can eliminate the brightness phenomenon of the single-point light source, and the brightness of each radiation angle is relatively uniform; using the light-emitting diode combination The LED module is capable of obtaining a surface light source with high white light purity and uniform brightness by RGB three-color light emitting diodes, and the chromaticity and color temperature are adjustable; the LEDs are regularly arranged in a certain combination manner, and It is applied to a backlight system that achieves better brightness uniformity and high white light purity. [Embodiment] Hereinafter, embodiments of the present invention will be further described in detail with reference to the accompanying drawings. Referring to the eighth and ninth embodiments, the LED 3 provided in the first embodiment of the present invention can generate red 'green and blue three-color light, and includes a substrate 31, an LED chip 32, and an optical lens 33. The LED chip 32 is located above the substrate 31 and electrically connected to the substrate 31, 9 1332273
使發光二極管晶;^32受激發光，光線經由光學鏡㈣出射餅 光學鏡片33大致為漏斗狀，其具有”第一開口331及一第二開口咖^ -開口之直雖第二開σ332小；第-開口331與基底31結合在-起，上、,十. 發光二極管晶片32位於基底31之被第i 口 331包圍之範圍内，優 j 位於第-開口331之中心位置’而第二開口332遠離基底以。光學鏡片^ 有-光滑外表面及’表©’其中’外表面可為—直線旋轉面並與基^ 31成-定的傾角；優選的’内表面具有複數微結構333，更優選的，該微钟 構333為環繞軸表面之階梯結構。另’基底31與發光二極管晶片犯之处: 方式可採用美國專利第6, 346, 771號所揭示之結構，基底具有—杯狀凹^ 發光二極管晶片位於該凹槽之底部。漏斗狀光學鏡片33可置於該杯狀凹曰槽 之開口部位，並且漏斗狀光學鏡片33之第一開口331與基底結合在—起。 光線自發光二極官晶片32發射出來，由於光學鏡片33之發散作用，其 有利於消弱中心點亮度，使得其各個輻射角度之亮度較均勻（參見第^ 圖）。將其應用於白光發光二極管模組，其利用红、綠、藍發光二極管三基 色混合產生白光，藉由光學鏡片33之發散作用，以一定排列方式組合之紅' 綠、藍發光二極管可進行充分之顏色混合。 本發明第二實施例所提供之發光二極管模乡i，其由複數紅、綠、藍發 光二極管按一定排列方式組合而成’該複數红、綠、藍發光二極管均採用 本發明第一實施所提供之發光二極管；該發光二極管模組藉由RGB(其中G代 表綠光發光二極管，R代表紅光發光二極管，B代表藍光發光二極管）三基色 混合產生白光，且白光色座標可達到Gc=0. 35,0=0.38。 參見第十一圖，發光二極管模組40包括五個發光二極管，其分別為兩 個紅光發光二極管，兩個綠光發光二極管，及一個藍光發光二極管◊該五 個發光二極管之排列方式為GRBRG線性排列。優選的，該五個發光二極管之 能量配比為G:R:B=1:1:0.18 ;優選的，相鄰兩個發光二極管之中心之距離 為9麵。當然，發光二極管模組也可以採用RGBGR，GRBBRG，RGBBGR，GRBGGBRG， GRBBRGGRB等線性排列，各排列中發光二極管之能量配比應視所要求之白光 色度(White Point)而定；優選的，相鄰兩個發光二極管之中心之距離為9mm。 可選的，發光二極管模組也可採用非線性排列組合。參見第十二圖及 10 1332273 第十二圖，複數紅、綠、藍發光二極管採用圓環形排列方式。如第十二圖 所示，發光二極管模組41由位於圓週之四個發光二極管（二個紅光發光二極 官及二個綠光發光二極管）及位於圓環中心之一個藍光發光二極管組成；如 - 第十三圖所示，發光二極管模組42由位於圓週之九個發光二極管（四個綠發 光二極管、二個紅光發光二極管及三個藍光發光二極管）構成，而圓環形排 列中心無發光二極管。 本實施例所提供之發光二極管模組，由於其所採用之發光二極管之各 個輻射角度之亮度較均勻，红、綠、藍發光二極管可進行充分混光；故其 產生之白光純度咼且為受度均勻之面光源》並且，由於其採用三基色混光 φ 以產生白光，故該發光二極管模組之色度及色溫可調。 參見第十四圖及第十五圖，本發明第三實施例所提供之背光系統1〇〇， 其包括一反射腔50，其具有一反射邊牆52及一反射底面53 :複數红、綠、 藍發光二極管，其以一定之組合方式規則排佈於上述反射底面53上以提供 面光源，一擴散片60，其位於上述反射腔5〇之上，以提供一亮度更均勻 之面光源，一集光片70，其位於上述擴散片6〇之上，以修正出射光之方向， 提高正面輝度。為進一步提昇正面輝度，還可於上述集光片上增加一增亮 • 膜。 ， 本實施例中，複數红、綠、藍發光二極管均採用本發明第一實施例之 發光二極管結構，且以一發光二極管模組為單元，於反射腔5〇之反射底面 ® 53以規則陣列方式（如矩陣方式）將複數發光二極管模組重複排佈。所謂 發光二極管模組”係指將複數紅、綠、藍發光二極管以一定組合方式排 列可產生白光之結構。 該發光二極管模組51可為兩個紅光發光二極管，兩個綠光發光二極 管，及一個藍光發光二極管構成之(；册抓線性排列（參見第十一圖），該五個 發光二極管混光後所產生之白光之色座標可達Cx=〇 35 Cy=〇 38，五個發光 二極管之能量配比優選為G:R:B=l:l:〇. 18 ;相鄰兩個發光二極管之中心之 距離優選為9瞧。該發光二極管模組51也可採用其它線性排列組合，如 GRBBRG，RGBBGR，GRBGGBRG，GRBBRGGRB等線性組合，各排列中發光二極管’ 之能量配比應視所要求之白光色度而;^ ;優選的，上述線性排列中^鄰二 11 1332273 個發光二極管之中心之距離優選為9刪。 可選的，發光二極管模組51之複數紅、綠、藍發光二極管採用非線性 ' 排列，如第十二圖及第十三圖所示之圓環形排列組合。參見第十二圖，發 • 光二極管模組由位於圓週之四個發光二極管（二個紅光發光二極管及二^ 綠光發光二極管）及位於圓環中心之一個藍光發光二極管組成；參見第十三 圖，發光二極管模組由位於圓週之九個發光二極管（四個綠發光二極管、二 個紅光發光二極管及三個藍光發光二極管）構成，而圓環形排列令心無發光 二極管。 本貫細例所七供之为光糸統100中，複數紅、綠、藍發光二極管以發光 φ 二極管模組51為單元，於反射腔50之反射底面53以規則陣列將該發光二極 官模組51重複排佈。其中，單個發光二極管之各個輻射角度之亮度均勻， 無單點光源壳度現象；因此’該發光二極管模組51中之複數紅、綠、藍發 光二極管可進行充分混光，以產生高純度白光，且其各個輻射角度之亮度 均勻；進而可獲取高質量之液晶顯示。 另外，本領域技術人員還可於本發明精神内做其他變化如變更光學 鏡片内表面之微結構，或適當變.更發光二極管模組中發光二極管之數量以 用於本發明等設計。 綜上所述，本發明確已符合發明專利要件，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，於援依 • 本案發明精神所作之等效修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 第一圖係先前技術中採用冷陰極螢光燈作為背光源之背光系統之侧視 圖。 第二圖係第一圖所示背光系統之俯視圖。 第三圖係先前技術中採用發光二極管作為背光源之背光系統之側視 圖。 ' 第四圖係第三圖所示背光系統之俯視圖。 第五圖係先前技術中背光系統採用之發光二極管立體示意圖。 第六圖係第五圖之沿VI-VI方向之剖面示意圖。 12The LED is excited; the light is excited by the optical lens (4), and the optical lens 33 is substantially funnel-shaped, and has a "first opening 331 and a second opening coffee. The first opening 331 is combined with the substrate 31, and the light emitting diode chip 32 is located in the range of the substrate 31 surrounded by the i-th port 331, and the j is located at the center of the first opening 331 and the second The opening 332 is away from the substrate. The optical lens has a smooth outer surface and a 'surface' where the outer surface can be a linear rotating surface and at an angle of inclination with the base 31; the preferred 'internal surface has a plurality of microstructures 333 More preferably, the micro-clock structure 333 is a stepped structure surrounding the surface of the shaft. The other is the structure of the substrate 31 and the LED chip: the structure disclosed in U.S. Patent No. 6,346,771, the substrate having - A cup-shaped recessed light-emitting diode chip is located at the bottom of the recess. A funnel-shaped optical lens 33 can be placed at the opening of the cup-shaped recessed groove, and the first opening 331 of the funnel-shaped optical lens 33 is combined with the substrate. Light self-luminous dipole 32 is emitted, because of the divergence of the optical lens 33, it is beneficial to weaken the brightness of the center point, so that the brightness of each radiation angle is relatively uniform (see Fig. 2). It is applied to the white light emitting diode module, which utilizes red The three primary colors of the green and blue light emitting diodes are mixed to produce white light, and the red 'green and blue light emitting diodes combined in a certain arrangement can perform sufficient color mixing by the divergence of the optical lens 33. The second embodiment of the present invention provides The light-emitting diode module i is formed by combining a plurality of red, green and blue light-emitting diodes in a certain arrangement. The plurality of red, green and blue light-emitting diodes all adopt the light-emitting diode provided by the first embodiment of the present invention; The group generates white light by RGB (where G represents a green light emitting diode, R represents a red light emitting diode, and B represents a blue light emitting diode), and the white light color coordinates can reach Gc=0.35, 0=0.38. In the eleventh diagram, the LED module 40 includes five light emitting diodes, which are respectively two red light emitting diodes and two green light emitting diodes. And a blue light emitting diode, wherein the five light emitting diodes are arranged in a linear arrangement of GRBRG. Preferably, the energy ratio of the five light emitting diodes is G:R:B=1:1:0.18; preferably, adjacent The distance between the centers of the two LEDs is 9. On the other hand, the LED modules can also be linearly arranged by RGBGR, GRBBRG, RGBBGR, GRBGGBRG, GRBBRGGRB, etc. The energy ratio of the LEDs in each arrangement should be determined according to the required white color. Preferably, the distance between the centers of two adjacent LEDs is 9 mm. Alternatively, the LED modules can also be combined in a non-linear arrangement. See Figure 12 and 10 1332273. Figure 12 shows that the complex red, green and blue LEDs are arranged in a circular arrangement. As shown in FIG. 12, the LED module 41 is composed of four LEDs (two red light emitting diodes and two green light emitting diodes) located at the circumference and a blue light emitting diode located at the center of the ring; As shown in FIG. 13 , the LED module 42 is composed of nine LEDs (four green LEDs, two red LEDs, and three blue LEDs) located on the circumference, and the center of the circular arrangement No light-emitting diodes. In the LED module provided in this embodiment, since the brightness of each of the radiation angles of the LEDs used is relatively uniform, the red, green, and blue LEDs can be sufficiently mixed; therefore, the white light produced by the module is pure and acceptable. The uniform surface light source and the color and color temperature of the LED module are adjustable because it uses three primary colors to mix light φ to generate white light. Referring to FIG. 14 and FIG. 15 , a backlight system 1A according to a third embodiment of the present invention includes a reflective cavity 50 having a reflective sidewall 52 and a reflective bottom surface 53 : a plurality of red and green colors a blue light emitting diode, which is regularly arranged on the reflective bottom surface 53 in a certain combination to provide a surface light source, and a diffusion sheet 60 located above the reflective cavity 5〇 to provide a more uniform surface light source. An optical sheet 70 is disposed above the diffusion sheet 6〇 to correct the direction of the emitted light and improve the front luminance. To further enhance the positive brightness, a brightening film can be added to the above concentrating sheet. In this embodiment, the plurality of red, green, and blue light-emitting diodes adopt the light-emitting diode structure of the first embodiment of the present invention, and the light-emitting diode module is used as a unit, and the reflective bottom surface of the reflective cavity 5 is a regular array of 53 The method (such as matrix mode) repeats the arrangement of the plurality of LED modules. The term "light-emitting diode module" refers to a structure in which a plurality of red, green and blue light-emitting diodes are arranged in a certain combination to generate white light. The light-emitting diode module 51 can be two red light-emitting diodes and two green light-emitting diodes. And a blue light-emitting diode (the book is linearly arranged (see the eleventh figure), the color coordinates of the white light generated by the five light-emitting diodes after mixing are up to Cx=〇35 Cy=〇38, five illuminations The energy ratio of the diode is preferably G: R: B = 1: 1: 〇. 18; the distance between the centers of two adjacent LEDs is preferably 9. The LED module 51 can also be combined with other linear arrangements. For example, GRBBRG, RGBBGR, GRBGGBRG, GRBBRGGRB and other linear combinations, the energy ratio of the LEDs in each arrangement should be determined according to the required white light chromaticity; ^; Preferably, the above linear arrangement is in the vicinity of 11 1332273 LEDs The distance between the centers is preferably 9. The optional red, green, and blue LEDs of the LED module 51 are arranged in a non-linear arrangement, such as the circular arrangement shown in the twelfth and thirteenth figures. In combination, see Fig. 12, the photodiode module consists of four LEDs (two red LEDs and two green LEDs) on the circumference and one blue LED in the center of the ring; In the thirteenth diagram, the light-emitting diode module is composed of nine light-emitting diodes (four green light-emitting diodes, two red light-emitting diodes, and three blue light-emitting diodes) located on the circumference, and the circular arrangement makes the heart have no light-emitting diodes. In the present embodiment, the plurality of red, green, and blue light-emitting diodes are in units of the light-emitting φ diode module 51, and the light-emitting diodes are arranged in a regular array on the reflective bottom surface 53 of the reflective cavity 50. The module 51 is repeatedly arranged, wherein the brightness of each radiation angle of the single LED is uniform, and there is no single-point source shell phenomenon; therefore, the plurality of red, green and blue LEDs in the LED module 51 can be fully mixed. Light, to produce high-purity white light, and the brightness of each radiation angle is uniform; thereby obtaining a high-quality liquid crystal display. In addition, the technology in the field The member may also make other changes in the spirit of the invention, such as changing the microstructure of the inner surface of the optical lens, or appropriately changing the number of light-emitting diodes in the light-emitting diode module for use in the design of the present invention, etc. It is clear that it has met the requirements of the invention patent, and the patent application is filed according to law. However, the above is only a preferred embodiment of the present invention, and those who are familiar with the skill of the present invention are equivalently modified or changed in the spirit of the invention. All of them should be included in the following patent application. [Simplified description of the drawings] The first figure is a side view of a backlight system using a cold cathode fluorescent lamp as a backlight in the prior art. A top view of the backlight system. The third figure is a side view of a backlight system using a light emitting diode as a backlight in the prior art. 'The fourth picture is a top view of the backlight system shown in the third figure. The fifth figure is a perspective view of a light-emitting diode used in the backlight system of the prior art. The sixth drawing is a schematic cross-sectional view along the VI-VI direction of the fifth figure. 12
13JZZ/J g 係第五圖所示發光二極管之光強分佈圖β 係相關本發明實施例之發光二極管之立體示意圖。 宽_，八方向之剖面示意圖。 第^係第七圖所示發光二極管之光強分佈示意圖。 麗·> —圖係摘 1本判實_之發光二極管模組巾發光二極管以線性 排怖之示意圖。 ㈣^十二_相關本㈣實補之發光二極管敎中發光二極管以圓環 形棑佈之示意圖。13JZZ/J g is a light intensity distribution diagram of the light-emitting diode shown in FIG. 5, which is a perspective view of a light-emitting diode according to an embodiment of the present invention. Wide _, a schematic view of the eight directions. The light intensity distribution diagram of the light-emitting diode shown in the seventh figure of the second embodiment. Li·> - Figure 1 is a schematic diagram of the light-emitting diode module towel LED in a straight line. (4) ^12_ Related (4) The schematic diagram of the light-emitting diode in the light-emitting diode in the form of a circular ring.
第十三圖係相關本發明另一 圓環形排佈之示意圖。 貫知例之發光一極管模組中發光二極管以 第十四圖係相關本發明實施例之背光系統側視圖。 第十五圖係第十四圖所示背光系統之俯視圖。 【主要元件符號說明】 發光二極管 30 發光二極管晶片 32 第一開口 331 微結構 333 背光系統 100 反射邊牆 52 擴散片 60Fig. 13 is a schematic view showing another circular arrangement of the present invention. The light-emitting diode of the light-emitting diode module of the known example is a four-figure side view of a backlight system according to an embodiment of the present invention. The fifteenth diagram is a plan view of the backlight system shown in Fig. 14. [Main component symbol description] LED 30 LED chip 32 First opening 331 Microstructure 333 Backlight system 100 Reflecting side wall 52 Diffuser 60
基底 光學鏡片 第二開口 332 發光二極管模组40、41、42、51 反射腔 ％ 反射底面 ％ 集光片 γ0 13Substrate optical lens Second opening 332 LED module 40, 41, 42, 51 Reflecting cavity % Reflecting bottom surface % Light collecting sheet γ0 13