1342434 九、發明說明： 【發明所屬之技術領域】 種應用發光. 本發明係有關於-種背光模組，特別是關於一 ^體以提高液晶顯示器之色彩飽和度之背光模組。 【先前技術】1342434 IX. Description of the Invention: [Technical Field of the Invention] The invention relates to a light-emitting device. The present invention relates to a backlight module, and more particularly to a backlight module for improving the color saturation of a liquid crystal display. [Prior Art]
次料^科餅展的大幅妨叹網關路1職技術、影像 ^傳輸之尚度發展，人們對多媒體顯示器之需求絲越大。近 =來由於液雜示H具有厚朗、f量輕賴帶枝，且相較於 ，統之映躲(Cathode Ray Tube ;CRT)顯示器有練射之優點，使 付需求快速的增加，並歧應用於監視器、筆記型、數位相 機等消費性電子產業，已逐漸成為顯示器產品之主流。 背光模組(Backlight Module)為液晶顯示器模組(LCD M〇dule) 的關鍵零组件之-’由於液晶本身不發光，背光模組之導光功能 即在於供應紋的亮度與分佈均㈣綠，使其能正常顯示影 像而市場上對於目則液晶顯示器之亮度需求與影像之色彩飽和 度的需求也越來越高。 背光模組所使用的光源主要有冷陰極螢光燈管(c〇ld Cath〇de 、Fluorescent LamP; CCFL)、熱陰極螢光燈管、發光二極體(Light .Emitting Diode; LED)及電激發光元件(E]ectro-Luminescence; EL) 等。由於發光二極體具有尺寸小，操作電流小，低耗電量及使用 時間長等優點，因此發光二極體為將來應用於背光模組之主要光 源。 先前技術中，有一些應用發光二極體為背光模組光源之技 1342434 術’仍然呈現不少待解決的問題。其中之—個問題是在先前技術 中，應用三個發光二極體，其分別為紅光，藍光，綠光，為光的 二原色，此二色光可相互混合成白光’然而，先前技術係將此三 、色發光二極體’封裝在一膠囊狀殼體内，再分別控制此三色發光 " 二極體之開關與強度，因此在控制上相當不易，且此三色光源， 尚須配合導光板上之導光部設計’如傳統切網版印刷技術於導 光減面製造若干導光部，該料光部料光板底面之粗糙面設 •計，糊散射顧使人射光藉由導光部而產生散射後，繼而穿透 出導光板表面H由於光色料同代表級長林同，使得 導光板對不同波長之光線將產生不同的折射率及散射能力，因 此’倘若導光板之導光結構係針對紅光的輝度啡度而設計，勢 必影響監光及綠光_度料效果，故當啊點亮紅、藍、綠三 色發光二極體時，將使三色光無法均勻混合而產生白光f 一 為了使背光模組的光源為均勾混合的白光，如美國專利第 籲2006/0072339號「Backlight Module」所述之背光模組，具有一藍 光發光二極體為光源及-導光板，並在光源與導光板之間放置營 .光物質’此#光婦經藍光照射，受舰發而產生黃光射出，因 ，.此’藍光與黃光兩色光比前述之三色光容易均勾混合成白光，以 形成背光模組之平面光源。此時，由於黃光並非光的三原色，係 為紅光與綠光的混合’因此黃光頻譜中所含有的紅光觸與綠光 頻譜之色純度不高，無法達到提高顯示器色彩餘和度的要求。 …欲解決以上所述之問題，即可使用高純度的彩⑽光片，使 k色光通而通過南純度之彩色遽光片的色光便具有較高光 6 1342434 頻譜之色純度。相對的，由於高純度之彩色濾光⑽掉大部分非 所需頻譜之光線，因而大大叫低了光線穿透量，造統晶顯示 器輝度不足的問題。 口此上述之技術中，為了生產高色彩飽和度及高輝度之液 .，晶顯示器’則須錢高純度之彩色濾光片及高亮度之發光二極體 ，姑加發光二極體使職量，相對增加背域組之製造成本。但 若改善統之色純度的問題，採用高純度之色光皿合導光板上 籲導光部之設計’使色光可均句混合成白光，即可提高液晶顯示器 之色彩飽和度，同時稀降錄晶顯示器的輝度，可解決先前技 術所遭遇之問題。 【發明内容】 馨於以上關題，本發明之目的鱗決先前技射背光模组 光源色純度不夠以致於液晶顯示器色彩飽和度不佳關題，不同 波長的色光混合成不羽白光的現象及背絲組正面輝度不 ^ 缺點。 ，為達到上述之目的’本發明揭露一種背光模組，其具有一導 光板及祕個光源，該導歧包含有—出光面、複數個環繞於出 、‘，面之人光面及複數組設置於與出絲相對之底_導光部，、該 歿數經導光部係對應一虛擬圓心形成一同心圓弧狀導光部組，^ =該導光雜之虛擬係位於轉人光面之外側，該等光源係 刀別對應於各導光部組’而由各導光部組之虛擬圓,。朝向複數個 入光面其中之一投射一光線’使各光源投射之光線被其所對應之 導光部組導引至出光面法線方向，其中各光源所投射之光線的波 7 1342434 長，係不等於其他光源所投射之光線的波長。 本發明之功效在於顧三種㈣波長之色❻背光光源 配合光路精確設計之導光部，以提高絲之色彩飽和度，使 色光可均自混合成自光，並且v字科光部可贿射㈣光面之 光線有較佳的方向性，以提高背絲經正面的輝度，即可以解決 妨技術中所遇見_題4發明亦可以減少在製程上因需使用 ^純度彩色濾光歧高亮度發光二極體或增加發光二極體^用數 量而附加的生產成本，使產品與價格更符合市場需求。 以下在實施方式中詳細敘述本發明之詳細特徵以及優點，爱 内容足以使任何熟習侧技藝者了解本發明之技綱容並據以實 施，且根據本說明書所揭露之内容、φ請專利範圍及圖式，任ς 熟習相關技藝者可軸地理解本發_關之目的及優點。 =上之_树_容找日狀町之實施方式之說明 以不範與_本發社原理，並战供本發明之翔 進一步之解釋。 文 【實施方式】 為使對本發明的目的、構造、特徵、及其舰有進_步 解，炫配合貫施例詳細說明如下。 “ 之第1第1Α圖」*「第1Β圖」’分別為本發明背光模組 之例之單—光源側視圖及本發明背光模組之第—實 之ν先板結構立體圖。如「第1Α圖」及「第m圖」所示 了包含有-導光板120以及一光源13〇。導光板12〇且有 -出先面m及—入光面124，且在相對於出先面122之一底面 1342434 上，形成複數個連續延伸之倒v字形導光部126，倒v字形導光 部126係於導光板12〇底面朝向出光面122之一溝槽，且各倒v 字形導光部126皆對應-虛擬圓心而形成一同心圓弧狀之導光部 組’對應不同之虛擬卿成不同之導光部組。細、13〇則設 置於各導光部組所對應之虛擬圓心位置，由絲、所發射之光 線L則藉由入光面124射入導光板12〇中。 明 >閱第ic圖」，係為本發明背光模組之第一實施例之光 •線導引示意圖。如「第1C圖」所示，背光模組100具有一導光板 120及光源130。導光板120包含一入光面124、一出光面122 以及複數個向導歧内部凹陷的倒v字形導絲12卜其中，入 光面124為導光板12〇鄰近光源13〇處以容許光線l，及l"射入之 -側面’出光面122係鄰接於入光面124以供光線乙，及L〃射出之 -頂面’倒v字形導光部126係位於出光面122戶斤對應之一底面 上’且為連續延伸溝槽結構’可將入射光、線l^l"導向出光面122 鲁法線方向。每-個倒v字形導光部126皆對應一虛擬圓心，且對 應^固虛擬圓心之多個倒v字形導光部126組成—同心圓弧狀 之V光雜。另外，光源13〇設置於各導光部組所對應之虛擬圓 ，心位置，且可為具有各種不同波長之光源。 …當;;自導光部組虛擬圓心位置的光源13〇投射之光線1壯" 牙匕入光面m η守’會於導光板⑽中進行全反射傳遞，藉由圓 弧狀排列之倒ν字形導光部126結構及特定的斜面角度設計，使 光線L及L㈣—至數次的全反射後，透過倒V字料光部⑶ 的斜面’再以全反射的方式將光線由出光面122的法線方 以2434 $射出。例如，通過出光面122的光線L，係以一次全反射而由出 "面122的法線方向射出；而通過出光面122的光、線L"則是征過 .二次全反射再由出絲122的法線方向㈣，其他姐導向卿 ，从此類推。由於自出光面122射出的光線，其光線分佈集中在出 光面122的法線方向附近，因此在導光板12〇之出光面⑵上可 ^得最大輝度。此外，針對不同波長的光源13〇，倒v字形導光 部126的斜面角度設計亦不相同，且當光源13〇所發出的光線l •入射非對應於光源130的倒v字形導光部126時，光線l被倒v 字形導光部U6全反射時，將不會以出光面122的法線方向射出 出光面122。因此’藉由上述背光模组設計，不同波長之光 源=〇可搭配不同的圓弧狀倒v字形導光部126結構，以使各倒 V字形導光冑126結構只能將所對應之各種不同波長的光源⑽ 導至出光面122法線方向射出’以提升背光模組1〇〇所提供光源 之混光均勻性。 、 • 請參閱「第2A圖」，係為本發明背光模組之第-實施例之三 種綠底視圖。如「第2A圖」所示，三種不同波長色光之料 .二極體綠湖m係分別為紅絲源11G，綠光光源⑴ .及藍光光源114，其中紅光波長介於63〇〜78〇啦，綠光波長介於 50G〜別啦’藍光波長介於42(Μ7()ηιη，且分別對應於三組由倒 V字形導絲126所組成之圓弧狀導光部組，其中每—個倒v字 形導光部126為連續延伸的溝槽結構。由於導光板12〇中各不同 位置至各色光光源110、112及1U之距離不同，因此，在習知技 術中會因偏重某-色糾導光效果而導致其他色光的導光效果不 U42434 \以致自出光面122某—位置射出之各色光強度不均而無法獲 色均勻的白光表現。為解決上述之問題，本發明藉由以各色 •、光原110 112及114為虛擬圓心之圓弧狀倒v字形導光部126 、’。構使各倒V子形導光部m結構只能將所對應之各種不同波 長的光線‘至出光面122法線方向射出，以加強各色光光源⑽、 112及114自出光面122射出之光線強度。因此，依據導光板⑽ 中各位置與各光源之轉程度，使各色光光源⑽、ιΐ2及⑽所 鲁對應之各同心圓弧狀倒v字形導光部126具有不同的密度分佈， 即各導光部組之密度分佈相異於其他導光部組之密度分佈，且其 分佈方式係沿著遠離所對應之色光光源11〇、112及ιΐ4方向，由 疏到密排列，以調整各色光光源no、112及m於出光面122各 位置之射出強度。 藉由上述適當的調整設計，可使自出光面122任何位置射出 之各色光線具有相同強度’以使三種不同波長的光線可自出光面 _ m任何位置射出而均勻混合成白S，以解決絲技術中，運用 南純度色光卻造成混光效果不佳的問題。例如「第2A圖」上之 .出光面⑵上-區域P，ϋ域p距離紅光光源11〇最遠，距離藍 .光光源114最近’因此’一般來說，自出光面122區域ρ射出之 紅細強度會小於藍光的強度，而使混合之光線偏向藍光。而在 本貫施例中’藉由調整設計每—層倒ν字形導光部126依距離而 有不同的疏密分佈’即可使導光；feUO中區域有相同強度之 紅光、綠光及藍光，以使三種不同波長的光線可自出光面122上 區域P均勻射出而混合成白光。本實施例中之不同波長之色光光 11 I342434 源並不僅限於三種光源，且入射光線L不限由同一入光面i74投 射進入導光板120中’又光源設置之位置亦不以本實施例為限。 請參閱「第2B圖」、「第2C圖」及「第2D圖」，分別為本發 明背光模組之第一實施例之不同光源位置及多種光源之底視圖。 如「第2B圖」及「第2C圖」所示，背光模組2〇〇及3〇〇中大部 分結構與上述「第2A圖」之背光模組]〇〇相同，其主要的差異 在於各色光光源110、112、114可置於導光板120四周不同位置， 鲁使二種不同波長的色光光源110、】12、114以不同角度之入光面 124入射至導光板120中。如「第2B圖」中各光源並非於同一直 線上，紅光光源】1〇及藍光光源114係位於導光板12〇兩相鄰角 落，而綠光光源112則置於紅光光源11〇及藍光光源114之間， 各色光光源110、112及114皆具有相應之入光面124;又如「第 2C圖」中各色光光源no、I〗]及Π4係分別位於導光板12〇的 二個角落，且具有其對應之入光面124。因此，本發明之背光模 •組可配合模組外觀的設計與體積的限制，而採用上述之設計，增 加背光模組在設計上的自由度。再者，如「第2D圖」所示，背 光模組400中大部分結構亦與上述「第2C圖」相同，其主要的差 •異在於導歧12G關的統數目增加為四光，其分別為紅 '々光光源110、綠光光源】12、藍光光源114及青光(Cyan)光源】】6 等四種不同波長的色光，其中紅光波長介於63〇〜78〇啦，綠光波 長介於500〜570歸，藍光波長介於420〜470 nm，青光波長介於 〇〇 470 nm’且各光源位於導光板12〇周圍之不同角落位置，而 光線L可從不同的入光面124射入導光板，中，藉由倒v字形 12 1342434 導光部m反射，而形成均勻混合的白光。因此，藉由四種高純 度且具有不同波長之色光，可以增加背光模靖提供之光源的色 彩飽和度。 上述本發明之背光模組，例如可配合場序法㈣Meq職㈣ .的驅動方式來’㈣每-鶴示晝面結構分紐個子結構， 例如分㈣紅絲結構、綠光子結構、藍光子結構，且在個別的 子結構時間内’只送出單-色光的光線經倒v字形導光部126反 •射導引而自出光面122射出以達於顯示面板上，並且隨著時間切 換而TT換不同顏色光源及其所對應的晝面子結構，配合本發明之 月7L核組’藉著快速切換使三色光因視覺暫留效果在人的眼晴中 均勻此合成白光。此顯不方法的優點在於不需要使用彩色濾光 片，並且每一色光的點亮時間可減少2/3，可以降低製造上的成 本’也節省能源的湞耗。 請參閱「第3A圖」及「第3B圖」，係為本發明背光模組之 φ 第二實施例之導光板結構立體圖及底視圖。本實施例之背光模組 500中大部分結構與第一實施例之背光模組1〇〇相同，其主要的 差異在於背光模組500中之導光板12〇除具有連續延伸結構之倒 ·. V字形導光部126之外，更包含分成多個區段之非連續延伸結構 之倒V字形導光部127 ^由於導光板12〇底部對應不同的光源位 置形成三組同心圓弧狀之導光部組，此三組同心圓弧之圓弧面必 定會有複數個交會處，為增加製造上的簡易度，因此，有些導光 4可δ又计為非連續延伸結構>5此種非連續延伸倒v字形導光部I〕？ 之形成，可以簡化導光部在交會處之設計，以降低在製造上的複 13 丄342434 雜性。當然，第二實施例之背光模組500之光源數量與相關位置 配設亦可如「第2B圖」、「第2C圖」及「第2D圖」所述之情形， 即所使用之光源並不僅限於三種光源’且入射光線不限由同—入 光面124投射進入導光板120中，又光源設置之位置亦不以本實 轭例為限。此外’本實施例之背光模組400亦可配合場序法(Fidd Sequential)的驅動方式來操作，將各色光光線以連續及非連續延伸 • 之倒V字形導光部126及127反射導引而自出光面122射出以達 • 於顯示面板上，藉由視覺暫留效杲在人的眼睛中均勻混合成白光。 請參閱「第4A圖」及「第4B圖」，分別為本發明背光模組 之第三實施例之單一光源側視圖及本發明背光模組之第三實施例 之導光板結構立體圖。如「第4A圖」及「第4B圖」所示，背光 模組600包含有-導光板！20以及複數個光源13〇。本實施例與 第一及第二實施例所述之背光模組最大差異在於其導光部係為突 出於導光板120外之V字形導光部128，其中每一個v字形導光 _ 部128為連續延伸的溝槽結構。本實施例之導光板12〇具有一出 光面122及複數個環繞於出光面122之入光面124，且在相對於 •出光面122之一底面上，形成複數組v字形導光部128，v字形 導光部係突出於導光板U0底面之一結構，且各v字形導光 部128皆對應一虛擬圓心、’對應同一個虛擬圓心、之多個v字形導 光部128組成-同心圓弧狀之導光部組；而複數個光源⑽則設 置於各導光部_對應之虛擬圓心位置，分別為紅光光源咖^The secondary material ^ section of the cake exhibition greatly sighs the gateway technology 1 technology, video transmission of the development of the degree, the demand for multimedia displays. Nearly = because the liquid shows that H has a thick lang, the amount of f is lightly branched, and compared to the advantages of the Cathode Ray Tube (CRT) display, so that the demand for payment increases rapidly, and Applicable to consumer electronics industries such as monitors, notebooks, and digital cameras, has gradually become the mainstream of display products. The backlight module (Backlight Module) is a key component of the liquid crystal display module (LCD M〇dule) - 'Because the liquid crystal itself does not emit light, the light guiding function of the backlight module lies in the brightness and distribution of the supply pattern (4) green. It enables it to display images properly, and there is a growing demand for the brightness requirements of the liquid crystal display and the color saturation of the image on the market. The light source used in the backlight module mainly includes a cold cathode fluorescent lamp (c〇ld Cath〇de, Fluorescent LamP; CCFL), a hot cathode fluorescent lamp, a light emitting diode (LED) and a light. Excitation element (E] ectro-Luminescence; EL), etc. Since the light-emitting diode has the advantages of small size, small operating current, low power consumption and long use time, the light-emitting diode is the main light source used in the backlight module in the future. In the prior art, there are some techniques for applying a light-emitting diode to a backlight module light source, which still presents a number of problems to be solved. One of the problems is that in the prior art, three light-emitting diodes are used, which are red, blue, and green, respectively, which are the two primary colors of light, which can be mixed into white light. However, prior art The three-color light-emitting diodes are packaged in a capsule-shaped casing, and then the three-color light-emitting " diode switching and strength are respectively controlled, so that it is quite difficult to control, and the three-color light source is still It must be matched with the design of the light guide on the light guide plate. For example, the conventional cut screen printing technology is used to manufacture a plurality of light guiding portions on the light guiding surface, and the rough surface of the bottom surface of the material light portion is designed to be used. After the scattering is generated by the light guiding portion, and then penetrates the surface H of the light guide plate, since the light color material is the same as the representative level, the light guide plate will have different refractive index and scattering ability for light of different wavelengths, so if the light guide plate The light guiding structure is designed for the luminance and brilliance of red light, which will inevitably affect the effect of monitoring light and green light. Therefore, when lighting red, blue and green light-emitting diodes, it will make the three-color light impossible. Uniform mixing In order to make the light source of the backlight module be a white light that is uniformly mixed, the backlight module described in "Backlight Module" of US Patent No. 2006/0072339 has a blue light emitting diode as a light source and a light guide plate. And placing a light between the light source and the light guide plate. The light material is illuminated by the blue light, and the yellow light is emitted by the ship. Because of this, the blue light and the yellow light are easier to light than the aforementioned three colors. The hooks are mixed into white light to form a planar light source of the backlight module. At this time, since the yellow light is not the three primary colors of light, it is a mixture of red light and green light. Therefore, the color purity of the red light spectrum and the green light spectrum contained in the yellow light spectrum is not high, and the display color balance cannot be improved. Requirements. In order to solve the above problems, a high-purity color (10) light sheet can be used, so that the color light of the color light passing through the south purity color light sheet has a higher color purity of the spectrum of the light 6 1342434. In contrast, because the high-purity color filter (10) removes most of the light of the undesired spectrum, it greatly reduces the amount of light penetration and creates a problem that the brightness of the crystal display is insufficient. In the above-mentioned technology, in order to produce a liquid with high color saturation and high luminance, the crystal display requires a high-purity color filter and a high-brightness LED, and a light-emitting diode. Quantity, relatively increase the manufacturing cost of the back domain group. However, if the problem of improving the purity of the color is improved, the design of the high-purity color light guide plate and the light guide portion of the light guide plate can be mixed to make the color light mixed into white light, thereby improving the color saturation of the liquid crystal display, and simultaneously reducing the saturation. The brightness of the crystal display can solve the problems encountered in the prior art. SUMMARY OF THE INVENTION In order to solve the above problems, the object of the present invention is that the color purity of the light source of the backlight module is insufficient, so that the color saturation of the liquid crystal display is not good, and the color light of different wavelengths is mixed into a white light. The frontal brightness of the back silk group is not a disadvantage. In order to achieve the above purpose, the present invention discloses a backlight module having a light guide plate and a secret light source, and the guide includes a light-emitting surface, a plurality of light-emitting surfaces, and a surface of the human face and a complex array. The light guide portion is disposed at a bottom opposite to the wire, and the plurality of light guide portions are formed by a virtual center to form a concentric arc-shaped light guide portion, and the virtual light of the light guide is located at the turn-on light. On the outer side of the surface, the light source is a virtual circle of each light guiding unit group corresponding to each light guiding unit group'. Projecting a light toward one of the plurality of light incident surfaces, so that the light projected by each light source is guided by the corresponding light guiding portion to the normal direction of the light emitting surface, wherein the light of the light projected by each light source is 7 1342434 long. It is not equal to the wavelength of the light projected by other sources. The utility model has the advantages that the three (four) wavelength color backlight source is matched with the optical path precise design of the light guiding portion to improve the color saturation of the silk, so that the color light can be self-mixed into self-light, and the v-shaped light part can be bribed. (4) The light of the smooth surface has better directionality to improve the brightness of the back yarn through the front surface, which can be solved by the technique. The invention can also reduce the need for the purity of the color filter in the process. The production cost of the light-emitting diode or the increase in the number of light-emitting diodes makes the product and the price more in line with market demand. The detailed features and advantages of the present invention are described in detail below in the embodiments. The content of the invention is sufficient to enable any skilled person to understand the technical scope of the present invention and to implement the present invention. Schematic, Ren Yi familiar with the relevant art can understand the purpose and advantages of this issue. =上上_树_容找的日状町 Description of the implementation of the non-standard and _ the principles of the Institute, and for the further development of the invention. [Embodiment] In order to make the purpose, structure, features, and ship of the present invention step by step, the detailed description of the embodiment is as follows. The "1st 1st drawing" * "1st drawing" is a perspective view of a single-light source side view of the backlight module of the present invention and a first actual structure of the backlight module of the present invention. The "light guide plate 120" and a light source 13" are included as shown in "Fig. 1" and "mth diagram". The light guide plate 12 has a front surface m and a light incident surface 124, and on the bottom surface 1342434 of the front surface 122, a plurality of continuously extending inverted v-shaped light guiding portions 126 are formed, and the inverted v-shaped light guiding portion is formed. 126 is a groove formed on the bottom surface of the light guide plate 12 toward the light-emitting surface 122, and each of the inverted-v-shaped light guiding portions 126 corresponds to the virtual center to form a concentric arc-shaped light guiding portion group corresponding to different virtual colors. Different light guide groups. Thin, 13〇 is placed at the virtual center of the light guide group, and the emitted light L is incident on the light guide plate 12 through the light incident surface 124. Ming >Reading the ic diagram is a schematic diagram of the light guide of the first embodiment of the backlight module of the present invention. As shown in "1C", the backlight module 100 has a light guide plate 120 and a light source 130. The light guide plate 120 includes a light incident surface 124, a light exit surface 122, and a plurality of inverted v-shaped guide wires 12 recessed therein. The light incident surface 124 is a light guide plate 12 adjacent to the light source 13 以 to allow light l, and l"Injection-side's light-emitting surface 122 is adjacent to the light-incident surface 124 for light B, and L〃--top surface 'inverted v-shaped light guide portion 126 is located on the bottom surface of the light-emitting surface 122 The upper 'and the continuous extending trench structure' can guide the incident light and the line l^1" to the direction of the rubbing line of the smooth surface 122. Each of the inverted v-shaped light guiding portions 126 corresponds to a virtual center, and a plurality of inverted v-shaped light guiding portions 126 corresponding to the virtual center are composed of concentric arc-shaped V-lights. In addition, the light source 13A is disposed at a virtual circle and a center position corresponding to each light guiding unit group, and may be a light source having various wavelengths. ...when;; the light source 13 from the virtual center of the light guide group 〇 projected light 1 strong " gums into the light surface m η 守 ' will be transmitted in the light guide plate (10) total reflection, arranged by arc The structure of the inverted V-shaped light guiding portion 126 and the specific bevel angle design are such that the light rays L and L (four) - after total reflection for several times, pass through the inclined surface of the inverted V-shaped material light portion (3) and then emit light by total reflection. The normal side of face 122 is shot at 2434 $. For example, the light L passing through the light-emitting surface 122 is emitted by the normal direction of the outgoing surface 122 by one total reflection; and the light and the line L" passing through the light-emitting surface 122 are collected. The normal direction of the wire 122 (four), other sisters directed Qing, and so on. Since the light emitted from the light-emitting surface 122 is concentrated in the vicinity of the normal direction of the light-emitting surface 122, the maximum luminance can be obtained on the light-emitting surface (2) of the light guide plate 12. In addition, for the light sources 13A of different wavelengths, the slope angle design of the inverted V-shaped light guiding portion 126 is also different, and the light emitted by the light source 13A is incident on the inverted V-shaped light guiding portion 126 that does not correspond to the light source 130. When the light ray 1 is totally reflected by the inverted v-shaped light guiding portion U6, the light-emitting surface 122 is not emitted in the normal direction of the light-emitting surface 122. Therefore, by the above backlight module design, the light source of different wavelengths can be matched with different arc-shaped inverted v-shaped light guiding portions 126, so that the inverted V-shaped light guiding 126 structure can only correspond to various types. The light source (10) of different wavelengths is guided to the normal direction of the light-emitting surface 122 to improve the light mixing uniformity of the light source provided by the backlight module 1 . • Please refer to “Figure 2A” for the three green bottom views of the first embodiment of the backlight module of the present invention. As shown in Figure 2A, three different wavelengths of light and light. The diode green lake m is red light source 11G, green light source (1) and blue light source 114, wherein the red wavelength is between 63〇~78. 〇啦, the green wavelength is between 50G~Others' blue wavelength is between 42(Μ7() ηιη, and corresponds to three sets of arc-shaped light guides composed of inverted V-shaped guide wires 126, each of which The inverted V-shaped light guiding portion 126 is a continuously extending groove structure. Since the distances from the different positions of the light guide plate 12 to the respective color light sources 110, 112 and 1U are different, in the prior art, the weight may be biased. The light-correcting light effect causes the light guiding effect of other color lights to be not U42434. Therefore, the light intensity of each color emitted from the position of the light-emitting surface 122 is uneven, and the white light performance of uniform color cannot be obtained. To solve the above problem, the present invention The arc-shaped inverted v-shaped light guiding portions 126 and ' are formed by the respective colors and the light sources 110 112 and 114 as the virtual center. The respective inverted V-shaped light guiding portions m are configured to only correspond to the light beams of different wavelengths. 'Exit to the normal direction of the light-emitting surface 122 to enhance the light source (10), 112 And the intensity of the light emitted from the light-emitting surface 122. Therefore, according to the respective positions of the light guide plate (10) and the degree of rotation of the light sources, the concentric arc-shaped inverted v-shaped light guides corresponding to the respective light sources (10), ιΐ2, and (10) The portion 126 has different density distributions, that is, the density distribution of each light guiding portion group is different from the density distribution of the other light guiding portion groups, and the distribution manner is along a direction away from the corresponding color light sources 11 〇, 112, and ι 4, The arrangement is performed to adjust the emission intensity of each of the color light sources no, 112 and m at each position of the light exit surface 122. With the above-mentioned appropriate adjustment design, the light rays of the respective colors emitted from any position of the light exit surface 122 can have the same intensity. So that the light of three different wavelengths can be emitted from any position of the light-emitting surface _ m and uniformly mixed into white S, in order to solve the problem that the use of the southern purity color light in the silk technology causes the light mixing effect to be poor. For example, "2A" The light-emitting surface (2) is on the upper region P, and the pupil region p is farthest from the red light source 11〇, and the distance from the blue light source 114 is the closest to the light source 114. Therefore, the intensity of the red light emitted from the light-emitting surface 122 region ρ is smaller than that of the blue light. The intensity of the light, so that the mixed light is biased toward the blue light. In the present embodiment, 'by adjusting the design, each layer of the inverted-shaped light guiding portion 126 has a different density distribution according to the distance' to make the light guide; feUO The middle region has red, green and blue light of the same intensity, so that three different wavelengths of light can be uniformly emitted from the region P on the light-emitting surface 122 to be mixed into white light. In this embodiment, the different wavelengths of the light and light light 11 I342434 are The incident light ray L is not limited to being projected into the light guide plate 120 by the same light incident surface i74. The position of the light source is not limited to this embodiment. Please refer to "2B" and "2C". And "2D", which are respectively different light source positions and bottom views of a plurality of light sources in the first embodiment of the backlight module of the present invention. As shown in Figure 2B and Figure 2C, most of the backlight modules 2 and 3 are identical to the backlight module of Figure 2A above. The main difference is that The light sources 110, 112, and 114 of the respective colors can be placed at different positions around the light guide plate 120, and the color light sources 110, 12, and 114 of the two different wavelengths are incident on the light guide plate 120 at different angles. For example, in "B2B", the light sources are not on the same line, the red light source 1" and the blue light source 114 are located at two adjacent corners of the light guide plate 12, and the green light source 112 is placed at the red light source 11 Between the blue light sources 114, the light sources 110, 112 and 114 of the respective colors have corresponding light-incident surfaces 124; as in the "2C", the light sources no, I, and Π4 of the respective colors are respectively located on the light guide plate 12? Each corner has its corresponding light incident surface 124. Therefore, the backlight module of the present invention can be matched with the design and volume limitation of the module appearance, and the above design is adopted to increase the degree of freedom of design of the backlight module. Furthermore, as shown in the "2D" diagram, most of the structure of the backlight module 400 is the same as that of the "2Cth diagram" described above, and the main difference is that the number of turns of the guide 12G is increased to four lights. There are four different wavelengths of light, such as red '々 light source 110, green light source 12', blue light source 114 and cyan light source, etc., where the red wavelength is between 63〇~78〇, green The wavelength of light is between 500 and 570, the wavelength of blue light is between 420 and 470 nm, the wavelength of cyan is between 〇〇470 nm and the light sources are located at different corners around the light guide plate 12, and the light L can be from different light entrance surfaces. 124 is incident on the light guide plate, and is reflected by the inverted v-shaped 12 1342434 light guiding portion m to form uniformly mixed white light. Therefore, by four kinds of high-purity and different wavelengths of color light, the color saturation of the light source provided by the backlight can be increased. The backlight module of the present invention can be combined with the field method (4) Meq (4) to drive the sub-structure of each of the four structures, for example, a red (4) red wire structure, a green photon structure, and a blue light substructure. And in the individual sub-structure time, the light that only sends out the single-color light is reflected by the inverted v-shaped light guiding portion 126 and is emitted from the light-emitting surface 122 to reach the display panel, and is switched over time. The different color light sources and their corresponding surface structures are combined with the monthly 7L core group of the present invention to enable the three-color light to be uniform in the human eye due to the rapid switching effect. The advantage of this method is that it does not require the use of color filters, and the lighting time per color can be reduced by 2/3, which can reduce the manufacturing cost and also save energy. Please refer to "3A" and "3B", which are perspective view and bottom view of the light guide plate of the second embodiment of the backlight module of the present invention. The majority of the structure of the backlight module 500 of the present embodiment is the same as that of the backlight module 1 of the first embodiment. The main difference is that the light guide plate 12 of the backlight module 500 has a continuous extension structure. In addition to the V-shaped light guiding portion 126, the inverted V-shaped light guiding portion 127 of the discontinuous extending structure divided into a plurality of segments is further formed by three different concentric arc-shaped guides corresponding to different light source positions at the bottom of the light guide plate 12 In the light group, the arc surfaces of the three sets of concentric arcs must have a plurality of intersections. In order to increase the ease of manufacture, some light guides 4 can be counted as non-continuous extension structures. Non-continuously extending inverted v-shaped light guiding portion I]? The formation can simplify the design of the light guide at the intersection to reduce the complexity of the manufacturing. Of course, the number of light sources and the related positions of the backlight module 500 of the second embodiment may be as described in "2B," "2C," and "2D", that is, the light source used. The incident light is not limited to being projected into the light guide plate 120 by the same-into-light surface 124, and the position of the light source is not limited to the actual yoke example. In addition, the backlight module 400 of the present embodiment can also be operated in accordance with a Fidd Sequential driving method to reflect and guide the inverted V-shaped light guiding portions 126 and 127 of the respective color light rays in a continuous and discontinuous manner. The self-illuminating surface 122 is emitted to reach the display panel, and is uniformly mixed into white light in the human eye by the visual persistence effect. Please refer to FIG. 4A and FIG. 4B, which are perspective views of a single light source side view of a third embodiment of the backlight module of the present invention and a light guide plate structure of a third embodiment of the backlight module of the present invention. As shown in "Fig. 4A" and "Fig. 4B", the backlight module 600 includes a light guide plate! 20 and a plurality of light sources 13 〇. The maximum difference between the backlight module and the backlight module of the first embodiment and the second embodiment is that the light guiding portion is a V-shaped light guiding portion 128 protruding from the light guide plate 120, wherein each of the v-shaped light guiding portions 128 It is a continuously extending groove structure. The light guide plate 12 of the embodiment has a light-emitting surface 122 and a plurality of light-incident surfaces 124 surrounding the light-emitting surface 122, and a complex array of v-shaped light guides 128 are formed on one of the bottom surfaces of the light-emitting surface 122. The v-shaped light guiding portion protrudes from one of the bottom surfaces of the light guide plate U0, and each of the v-shaped light guiding portions 128 corresponds to a virtual center, and corresponds to the same virtual center, and the plurality of v-shaped light guiding portions 128 are formed - concentric circles An arc-shaped light guiding portion; and a plurality of light sources (10) are disposed at respective virtual center positions of the respective light guiding portions _, respectively, red light source coffee ^
綠光光源112及藍光絲m，光線L則藉由入光面124射入導 光板120中。 V 14 1342434 如「第4C圖」所示，當一自導光部組虛擬圓心位置的光源 130才又射之光線l及L’’穿過入光面124時，會於導光板12〇中進 .行全反射傳遞，藉由圓弧狀排列之V字形導光部⑶結構及特定 .的斜面角度設計’使光線L'及ΙΛ經過-至數次的全反射後，透過 ' V子形導光部128的斜面，再以全反射的方式將光線L'及L"由出 光面122的法線方向射出。如通過出光© 122的光線1/係以-次 .王反射而由出光面122的法線方向射出’而通過出光面122的光 ♦線L"則是經過二次全反射再由出光面122的法線方向射出，其他 光線導向情形以此類推。 木二!之$。光模組_之光源數量與相關位置配 叹亦可如「第2B圖」、「第2C圖」及「第2D圖」所述之情形， 即所使用之光源並不僅限於三種光源，且人射光線不限由同一入 絲I24投射進人導光板m中，又光源設置之位置亦不以本實 ，例為限。此外，本貫施例之背絲組_亦可配合場序法㈣d Sequential)的驅動方式來操作。 之導:=爐弟二圖」所Ϊ，係為本發明背光模組之第四實施例 、”。立租圖。本實施例之導光板大部分 ： 例相同，其主|的矣里,认，e , , t、弟一只知The green light source 112 and the blue light m, the light L is incident on the light guide plate 120 through the light incident surface 124. V 14 1342434 As shown in Fig. 4C, when the light source 130 and the light source 130 from the virtual center position of the light guiding portion pass through the light incident surface 124, it will be in the light guide plate 12? The total reflection transmission is performed by the V-shaped light guiding portion (3) arranged in an arc shape and the specific bevel angle design 'to make the light L' and the ΙΛ pass through - to several times total reflection, and then pass the 'V shape The inclined surface of the light guiding portion 128 emits the light rays L' and L" from the normal direction of the light emitting surface 122 by total reflection. For example, the light ray passing through the light-emitting surface 122 is emitted from the normal direction of the light-emitting surface 122, and the light ray line L through the light-emitting surface 122 is subjected to secondary total reflection and then from the light-emitting surface 122. The normal direction of the shot, and other light-guided situations and so on. Wood II! The number of light sources of the optical module _ can be sighed with the relevant position as described in "2B", "2C" and "2D", that is, the light source used is not limited to three kinds of light sources, and The light of the light is not limited to be projected into the light guide plate m by the same wire I24, and the position of the light source is not limited to the actual one. In addition, the back wire group of the present embodiment can also be operated in accordance with the driving method of the field sequential method (4) d Sequential). The guide: = the second brother of the furnace, is the fourth embodiment of the backlight module of the present invention, "the rent chart. Most of the light guide plate of this embodiment: the same example, the main | Recognize, e, t, brother
如道^ 祕12G除具有連續延伸結構之V / ’ 卩128之外’更包含麵續延伸結構之V字形導光部 ⑵。此種非連續延伸之v字形導光部 ， 光部在交會處之財，㈣術上的麵。當3= 背圖光模組之光源數量與相關位置配設亦可如「第2B圖二 弟2C圖」及「第2d圖所β 」 心所述之情形，即所使用之光源並不僅 1342434 限於三種光源’且入射光線不限由同一入光面124投射進入導光 板120中，又光源設置之位置亦不以本實施例為限。此外，本實 施例之背光模組亦可配合場序法(Field Sequential)的驅動方式來 操作。 ' 因此，本發明可以解決先前技術中所遭遇之問題，在本發明 所揭露之背光模組中，由於使用三種以上高純度、不同波長的色 光光源，有助於提升液晶顯示器的色彩飽和度，並且配合背光模 鲁組之導光板上具有同心圓弧狀之導光部結構’使得高純度、不同 波長之色光可均勻混合成白光，提高液晶顯示器的光源均勻性。 再者，藉著本發明可以減少在製程上因需使用高色純度彩色渡光 片及鬲焭度發光二極體或增加發光二極體使用數量而附加的生產 成本，使產品與價格更符合市場需求。 雖然本發明之實施例揭露如上所述，然並非用以限定本發 任何4 $相關技*者，在不脫離本發明之精神和範圍内，舉 =本發”請範圍之做、構造、特徵及精神當可做些許 之又，’例如導光部結構的斷面不限於V字形，可以是u字形、 2等因此本發明之專利保護範圍須視本說明書所附之 利乾圍所界定者鱗。 寻 【圖式簡單說明】 ί 發明背光模組之第—實施例之單—辆、側視圖； 第為本之第—實施例之導光板結構立體圖； 笛，Λ 、月先拉組之第一實施例之光線導引圖； 圖為本發明背光模組之第—實施例之直線排列之三種光源 16 1342434 底視圖； 貫施例之三種不同光源位置底 第2B圖為本發明背光模組之第— 視圖； —三種不同光源配 第2C圖為本發明背光模組之第一實施例之另 置底視圖；For example, in addition to V / ' 卩 128 having a continuous extending structure, the V-shaped light guiding portion (2) further includes a surface extending structure. Such a non-continuously extending v-shaped light guiding portion, the light portion at the intersection, and (4) the surgical surface. When the number of light sources and the relevant positions of the 3= back light module can also be as described in "2B Figure 2C Figure 2" and "Fig. 2d Figure β", the light source used is not only 1342434 It is limited to three kinds of light sources' and the incident light is not limited to be projected into the light guide plate 120 by the same light incident surface 124, and the position of the light source is not limited to this embodiment. In addition, the backlight module of this embodiment can also be operated in accordance with the field sequential method (Field Sequential). Therefore, the present invention can solve the problems encountered in the prior art. In the backlight module disclosed in the present invention, since three or more high-purity and different-wavelength color light sources are used, the color saturation of the liquid crystal display is improved. Moreover, the light guide plate having a concentric arc shape in combination with the light guide plate of the backlight mode group enables the high-purity and different-wavelength color lights to be uniformly mixed into white light, thereby improving the uniformity of the light source of the liquid crystal display. Furthermore, the invention can reduce the production cost associated with the use of high-color purity color light-emitting sheets and temperature-emitting diodes or increase the number of light-emitting diodes in the process, so that the products and prices are more in line with the price. Market demand. Although the embodiments of the present invention are disclosed above, it is not intended to limit the scope of the present invention, and the scope, construction, and features of the present invention are not included in the spirit and scope of the present invention. And the spirit can do something, 'for example, the cross section of the light guide structure is not limited to a V shape, and may be u-shaped, 2, etc. Therefore, the scope of patent protection of the present invention is defined by the reference of the Legan Wai attached to the present specification.鳞 [Simplified description of the drawing] ί Invented the backlight module - the single-vehicle, side view of the first embodiment; the first embodiment - the light guide plate structure of the first embodiment; flute, Λ, Yue Xian pull group The light guide diagram of the first embodiment; the bottom view of the three light sources 16 1342434 arranged in a straight line according to the first embodiment of the backlight module of the present invention; the three different light source positions of the embodiment are shown in FIG. 2B, which is the backlight mode of the present invention. The first part of the group is a view of the first embodiment of the backlight module of the present invention;
弟D圖為本發明背光模組之第一實施例之多種光源配置底視圖; :3A圖為本發明背光模組之帛二實施例之導光板結構立體圖； 弟3B圖為本發明背光模組之第二實施例之三種光源底視圖； 第/A圖為本發明背光模組之第三實施例之單-光源側視圖； 第犯圖為本發明背光模組之第三實施例之導光板結構立體圖； 第4C圖為本發明背光模組之第三實施例之光線導引圖；及 第D圖為本發明背光模組之第四實施例之導光板結構立體圖。 【主要元件符號說明】 背光模組 紅光光源 綠光光源 藍光光源 青光光源 導光板 出光面 入光面 倒V字形導光部 V字形導光部 100、200'300、400、5〇〇、600 110........................... 112.................................... 114...................................... 116...................................... 120...................................... 122...................................... 124...................................... 126 ' 127.............................. 128 ' 129................ 17 1342434 130.........................................................光源 L、L/、L"................................................光線 P............................................................㈣ 18D is a bottom view of a plurality of light source configurations of the first embodiment of the backlight module of the present invention; 3A is a perspective view of a light guide plate structure of the second embodiment of the backlight module of the present invention; The bottom view of the three light sources of the second embodiment; the first/A is a side view of the single-light source of the third embodiment of the backlight module of the present invention; the first view is the light guide plate of the third embodiment of the backlight module of the present invention. FIG. 4C is a perspective view of a light guide of a third embodiment of the backlight module of the present invention; and FIG. 4D is a perspective view of a light guide plate of a fourth embodiment of the backlight module of the present invention. [Main component symbol description] Backlight module red light source green light source blue light source cyan light source light guide plate light surface entrance surface inverted V-shaped light guide V-shaped light guide unit 100, 200'300, 400, 5〇〇, 600 110...........................112..................... ............... 114.................................. .... 116...................................... 120... ................................ 122................. ..................... 124............................ .......... 126 ' 127.............................. 128 ' 129.... ............ 17 1342434 130................................ ......................Light source L, L/, L".................... ............................Light P.................... ..................................(4) 18