TWI317825B - Light source system - Google Patents
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- TWI317825B TWI317825B TW95122910A TW95122910A TWI317825B TW I317825 B TWI317825 B TW I317825B TW 95122910 A TW95122910 A TW 95122910A TW 95122910 A TW95122910 A TW 95122910A TW I317825 B TWI317825 B TW I317825B
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1317825 九、發明說明: 【發明所屬之技術領域】 ^ 本發明提供一種光源系統’尤指一種利用彩色發光二極體當作 ' 光源而能提供單一偏極分量白光光源之光源系統。 【先前技術】 由於液晶顯示器具有外型輕薄、耗電量少以及無輻射污染等特 • 性,因此為目前日漸普及的一種顯示裝置,已廣泛地應用於個人 桌上型電腦螢幕以及筆記型電腦、個人數位助理(PDA)、手機等 攜帶式資訊產品上,並逐漸取代陰極射線管(Cath〇deRayTube, CRT)監視器及傳統電視。 般而 s ’ 液晶顯示模組(liquid cryStal display module,LCM) 為一液晶顯示器中最關鍵的裝置,其包含有液晶顯示面板及背光 模組等元件。液晶顯示面板係在兩片玻璃基板中設置一液晶分子 層,通常在各玻璃基板上會先塗佈配向層,以使液晶分子順著一 個特定且平行於玻璃表面的方向排列。藉由在玻璃基板上的電晶 體、電極等電子元件,可紐晶分子提供電場而使液晶分子隨電 k場大小喊轉’由於液晶分子的雙折醉佩液晶分子的方向而 ' 改變,便會使偏極光在經過液晶分子時產生偏極方向的改變。因 此’液涵示面板的顯示原理即是在液晶顯示面板的上、下兩側 各設置-偏(polarizei·) ’並配合液晶分子的旋轉以控制出光 面的光線量,便可顯示出晝面。 1317825 ' 請參考第1圖,第1圖為習知一液晶顯示器ίο的構造爆炸圖。 ,, 習知液晶顯示器面板12包含有二玻璃基板,其上設有電極,而玻 ^ 璃基板中間設置有液晶分子。液晶顯示面板12兩侧則設置有第一 偏光片16與第二偏光片14,兩者穿透軸互相垂直。背光模組μ 包含有複數個光源20設於液晶面板12下方兩侧,固定於背光模 組18的外框中’且外框另包含有設於光源20外側的散熱片22。 φ 此外,背光模組18通常包含有導光板24設於液晶顯示面板12的 正下方、反射片26設於導光板24下方以及一第一擴散片28、二 棱鏡片30、32和一第二擴散片34依序設於導光板24之上方。 習知液晶顯示器10的顯示原理,是藉由液晶顯示面板兩側 穿透軸互相垂直之第一與第二偏光片16、14來控制通過之光線亮 度。由背光模組18產生的隨機偏極光在經過第一偏光片16時, 大約50%的光線會被第一偏光片16吸收,而通過第一偏光片16 進入液晶層的光線皆為平行於第一偏光片16之穿透轴的偏極光。 接著,藉由對液晶顯示面板12各像素施加電場而旋轉液晶分子的 排列方向,使得偏極光改變其偏極方向,當偏極光的偏極方向平 行於第二偏光片14的穿透軸時,便可穿過第二偏光片14而顯示 •a面,反之責會被第二偏光片14所吸收。由上述可知,無論背光 模組18所提供的亮度如何,具有第一偏光片16的液晶顯示器1〇 都只能達到50%的光線利用率。 1317825 再者,目前一般小尺寸的液晶顯示器ίο多採用發光二極體1317825 IX. Description of the Invention: [Technical Field] The present invention provides a light source system, particularly a light source system that uses a color light-emitting diode as a light source to provide a single polarized component white light source. [Prior Art] Since the liquid crystal display has the characteristics of being thin and light in size, low in power consumption, and free from radiation pollution, it is widely used as a display device and is widely used in personal desktop computers and notebook computers. Portable information products such as personal digital assistants (PDAs) and mobile phones have gradually replaced cathode ray tubes (Cath〇 deRayTube, CRT) monitors and traditional televisions. The liquid cryStal display module (LCM) is the most critical device in a liquid crystal display, and includes components such as a liquid crystal display panel and a backlight module. The liquid crystal display panel is provided with a liquid crystal molecular layer in two glass substrates, and an alignment layer is usually applied on each of the glass substrates so that the liquid crystal molecules are aligned along a specific direction parallel to the glass surface. By means of an electronic component such as a transistor or an electrode on a glass substrate, the Nissin molecule can provide an electric field and cause the liquid crystal molecule to change with the size of the electric k field, which is changed by the direction of the liquid crystal molecules. This causes the polarization of the polarized light to change in the direction of the polarization when passing through the liquid crystal molecules. Therefore, the display principle of the liquid display panel is that the polarizing surface is set on the upper and lower sides of the liquid crystal display panel, and the rotation of the liquid crystal molecules is used to control the amount of light on the light surface, so that the surface can be displayed. . 1317825 ' Please refer to Figure 1, which is a structural explosion diagram of a conventional liquid crystal display ίο. The conventional liquid crystal display panel 12 includes two glass substrates on which electrodes are disposed, and liquid crystal molecules are disposed in the middle of the glass substrate. On both sides of the liquid crystal display panel 12, a first polarizer 16 and a second polarizer 14 are disposed, and the transmission axes of the two are perpendicular to each other. The backlight module μ includes a plurality of light sources 20 disposed on two sides of the liquid crystal panel 12 and fixed to the outer frame of the backlight module 18, and the outer frame further includes a heat sink 22 disposed outside the light source 20. In addition, the backlight module 18 generally includes a light guide plate 24 disposed directly below the liquid crystal display panel 12, a reflective sheet 26 disposed under the light guide plate 24, and a first diffusion sheet 28, two prism sheets 30, 32, and a second portion. The diffusion sheet 34 is sequentially disposed above the light guide plate 24. The display principle of the conventional liquid crystal display 10 is to control the brightness of the light passing through the first and second polarizers 16, 14 which are perpendicular to each other on the both sides of the liquid crystal display panel. When the random polarized light generated by the backlight module 18 passes through the first polarizer 16, about 50% of the light is absorbed by the first polarizer 16, and the light entering the liquid crystal layer through the first polarizer 16 is parallel to the first A polarized light that penetrates the axis of a polarizer 16. Then, by applying an electric field to each pixel of the liquid crystal display panel 12 to rotate the alignment direction of the liquid crystal molecules, the polarized light changes its polarization direction, and when the polarization direction of the polarized light is parallel to the transmission axis of the second polarizer 14, The ?a face can be displayed through the second polarizer 14, and the responsibility is absorbed by the second polarizer 14. As can be seen from the above, regardless of the brightness provided by the backlight module 18, the liquid crystal display 1 with the first polarizer 16 can only achieve 50% light utilization. 1317825 Moreover, currently small-sized liquid crystal displays ίο mostly use light-emitting diodes
、 (lightemittingdi〇de ’ LED)來作為其光源20,但由於白光LED ''的發展未臻成熟,所以習知背光模組18通常採用多顆具有不同顏(lightemittingdi〇de ’LED) is used as its light source 20, but since the development of the white LED '' is not mature, the conventional backlight module 18 usually adopts multiple different colors.
. 色的led來作為光源20,例如以紅光LED、綠光LED及藍光LED 交錯並排來提絲源。然*,以乡色led當作綠會發生混光不 均勻之問題,因此現行作法是增加先_混光距離,但此舉又會 降低光的使用效率及放大產品尺寸,無法滿足資訊顯示產品輕薄 I 化的需求。 【發明内容】 本發明之目的在於提供一種包含有光學轉換模組的光源系 統’其能提供單-偏極光源給液晶顯示面板,以提高顯示器的整 體7C度與光利用效率。 根據本發明之巾請專利範圍,本發明光齡統包含有—光學轉 i 3組與-第—彩色光源與—第二彩色光源,其中光學轉換模組 匕3有至、光偏極化元件以及一偏極調變元件。光偏極化元件 =3有出絲以及至少—雙折射面,雙折射面能讓第—偏極分 畺通過、並反射第二偏極分量,且雙折射面之—面為—穿透面, t面為-反射面。第―、第二彩色光源分別產生顏色不同之第 办色光線與第二彩色光線,且第一'第二彩色光源係設於光學 轉換模組之兩側而相對設置,而第一、第二彩色光線可混光成為 白光第或第二彩色光線會經由雙折射面分光而成為第一偏極 1317825 ::里’、第—偏私里’而第—或第二偏極分量會再經由偏極調變 兀件之作用而轉換其偏極方向,錢第—或第二彩色光線皆機 :為第:偏極分量或第—偏極分量,而由出光騎出光㈣換模組。 ,由於本發明將不同顏色光源設於光學轉換模組之兩侧,再藉由 ^干模組内如猜射鱗特殊設計,可使各彩色光線在光學轉換 模組内充分混光,並將光線轉換為單一偏極分量,以提高整體光 _線彻轉。再者,由於不_色的絲係設置於光源系統之不 同處13此本發明可針對不同顏色光源設計所需的散熱環境,以 進一步改善光學效果與延長光源壽命。 【實施方式】 口月參考第2圖’第2圖為本發明光源系統之第一實施例的側面 不思圖。光源系統50包含有至少一光學轉換模組52、一紅光光源 位於光學轉換模組52的左似及—綠光光源與—藍絲源⑽中 僅繪出一光源以作為代表)位於光學轉換模組52之右侧,其中上 述光源皆為LED光源。光學轉麵組η包含有二偏極化元件M、 56、一偏極調變元件58設於第一、第二光偏化元件%、兄之 ' 間以及一具反射性膜片64,設於第一、第二光偏極化元件54、56 ' 下方’較佳為二分之一相位延遲膜。第一、第二光偏極化元件54、 56為雙折射(doublerefracti〇n)晶體所構成,例如石英方解石 或冰洲石,能將隨機偏極分量分為一第一偏極分量與一第二偏極 刀置,並讓弟一偏極分量通過,而反射第二偏極分量。 1317825 光學轉換模組52包含有互相平行的第一入光面6〇與第二入光 面62用來接收兩侧光源所產生的隨機偏極分量、二位於同一平面 的第一出光面66、68、第二出光面70、72以及二位於同一平面的 第二出光面74與第四出光面76,其中偏極調變元件%係緊鄰於 第二出光面70、72而設置。此外,第一光偏極化單元%與第二 光偏極化單元56时觀含有—雙折射面78、80,其中雙折射面 78相反於第-人絲6G之—面為-反脑%,能完全反射光線, 而雙折射面78鄰近於第一入光面6〇之一面為一穿透面82,會反 ^第偏極分量而讓第一偏極分量通過:類似地,第二光偏極化 =的雙折射面80在相反於第二入光面62之一面為一反射面 偏極1旦、Γ為穿透面84,同樣可反射第二偏極分量,而讓第一 60的H過。此外在本實施例中,雙折射面78與第一入光面 45。。再者射面8〇與第二入光面62之夾角,其較佳為 所μ詈/、 膜片64係垂直於第一、第二入光面60、62 所3又置,且設於第三、第四出光面74、76表面。 左侧紅光光源所產生的弁 極分量Sr,,會瘦由 、^ 3有第一偏極分量IV與第二偏 行進至雙折射面二;光:60進入第-光偏極咖^ 至第二出光面7〇,經由偏極'^極分量P,可通過穿透面82而行進 再行進至第二光偏極化單件58轉換為第二偏極分量V, 反射,而由第—出Μ 68 抑⑽’被反射面88完全 出,而由弟—入光面60進入光偏極 1317825 單疋54中的第二偏極分量Sr,, 三出光面74射出,接著祐且咖^雙折射面%反射,由第 54 ^ 出接者被具反射性臈片&反射回光偏極化單牙 4之内’經過穿透面82而由第—出光面 早兀 同樣的’由右侧藍光與綠光光源經由第二人光面幻進 SGB=rr=r有第—偏極分量Pgb與第:偏極分一量 /、偏極^ PGB會穿過穿透面84而行進至第 全2^偏_變元件58觀成第二偏極分量Sgb,觀射面%完 極八=由第$光面66射出;由第二人光面62進人的第二偏 、刀量SgB則會被雙折射面80反射,由第四出光面76射出,再 =反射性膜片64反射回第二光偏極單元56而由第一出光面砧 。由上述可知,統所產生的賴偏極 偏極分量WsR’’而由光學轉換模組52的第一出先 =; 射出,以提供具有單一偏極分量的光源系統5〇。 請參考第3圖,第3圖為本發明光源系統之第二實施例的剖面 不意圖。在此實施例中,本發明光源系統1〇〇包含有一光學轉換 裝置102以及一侧光源,其中紅光光源丨36設於光學轉換裝置 之左側,而藍光與綠光光源138設於光學轉換模組1〇2之右側。 光學轉換裝置102包含有一具反射性膜片110、一偏極調變元件 108與第一、第二光偏極化元件1〇4、1〇6依序堆疊設置,其中偏 極調變元件108為四分之一相位延遲膜,能將線偏極光轉換為圓 偏極光。The colored led light is used as the light source 20, for example, a red light LED, a green light LED, and a blue light LED are alternately arranged side by side to feed the wire. However, the problem of uneven mixing of light is caused by the green color of the green color. Therefore, the current practice is to increase the first _mixing distance, but this will reduce the efficiency of light use and enlarge the size of the product, and cannot meet the information display products. The need for thin and light I. SUMMARY OF THE INVENTION An object of the present invention is to provide a light source system including an optical conversion module that can provide a single-polarized light source to a liquid crystal display panel to improve the overall 7C degree and light utilization efficiency of the display. According to the patent application scope of the present invention, the light age system of the present invention comprises an optical conversion group and a first color light source and a second color light source, wherein the optical conversion module has an optical polarization component. And a polarization modulation component. The optically polarized element=3 has a wire and at least a birefringent surface, and the birefringent surface allows the first-polar pole to pass through and reflect the second polarized component, and the surface of the birefringent surface is the through-plane , t face is - reflective surface. The first and second color light sources respectively generate the first color light and the second color light of different colors, and the first 'second color light source is disposed on opposite sides of the optical conversion module and is oppositely disposed, and the first and second colors are respectively The colored light can be mixed into white light or the second colored light will be split through the birefringent surface to become the first polarizer 1317825 :: inside, the first - the second private and the second or second polarized component will pass the polarization The function of the modulation element is to change its polarization direction, and the money- or second color light is the machine: the first: the polar component or the first-polar component, and the light is taken out by the light (4). Because the present invention sets different color light sources on both sides of the optical conversion module, and then special design such as guessing scales in the dry module, the color light can be fully mixed in the optical conversion module, and The light is converted into a single polar component to improve the overall light_line. Moreover, since the non-color silk is disposed at different points of the light source system, the present invention can design a heat dissipation environment for different color light sources to further improve the optical effect and extend the life of the light source. [Embodiment] The month of the month refers to Fig. 2, and Fig. 2 is a side view of the first embodiment of the light source system of the present invention. The light source system 50 includes at least one optical conversion module 52, a red light source is located in the left of the optical conversion module 52, and the green light source and the blue light source (10) are only represented by a light source as a representative). The right side of the module 52, wherein the light sources are all LED light sources. The optical conversion surface group η includes two polarization elements M, 56, and a polarization modulation element 58 is disposed between the first and second polarization polarization elements, the brother's, and a reflective diaphragm 64. Preferably, the lower portion of the first and second optically polarizing elements 54, 56' is a one-half phase retardation film. The first and second optical polarization elements 54, 56 are formed by a birefringent crystal, such as quartz calcite or ice stone, which can divide the random polarization component into a first polarization component and a first The two poles are placed, and the second component of the second pole is reflected. 1317825 The optical conversion module 52 includes a first light-incident surface 6〇 and a second light-incident surface 62 which are parallel to each other for receiving a random polarization component generated by the two side light sources, and a first light-emitting surface 66 located on the same plane. 68. The second light-emitting surface 70, 72 and the second light-emitting surface 74 and the fourth light-emitting surface 76 are disposed on the same plane, wherein the polarization-modulating element% is disposed adjacent to the second light-emitting surface 70, 72. In addition, the first photo-polarization unit % and the second photo-polarization unit 56 have a birefringence surface 78, 80, wherein the birefringence surface 78 is opposite to the surface of the first human filament 6G. The light can be completely reflected, and the birefringent surface 78 is adjacent to the first light incident surface 6 为 as a penetration surface 82, which will reverse the first polarization component and let the first polarization component pass: similarly, the second The birefringence surface 80 of the optical polarization = a surface opposite to the surface of the second light incident surface 62 is a reflection surface which is polarized for one day, and Γ is a penetration surface 84, and the second polarization component is also reflected, and the first 60 H passed. Further in the present embodiment, the birefringent surface 78 and the first light incident surface 45. . Further, the angle between the surface 8 〇 and the second light incident surface 62 is preferably μ 詈 /, and the diaphragm 64 is perpendicular to the first and second light incident surfaces 60 , 62 and is disposed at The surfaces of the third and fourth light exiting surfaces 74, 76. The drain component Sr generated by the red light source on the left side will be thin, ^3 has the first polarization component IV and the second bias travels to the birefringence surface 2; light: 60 enters the first-light polarization The second light-emitting surface 7〇, through the polarization pole component P, can travel through the penetration surface 82 and then travel to the second light polarization single element 58 to be converted into the second polarization component V, and the reflection - Μ 68 ( (10) 'is completely reflected by the reflecting surface 88, and the second-polar component Sr of the light-emitting surface 60 enters the light-biased pole 1317825, and the three light-emitting surface 74 is emitted, and then the ^Birefringent surface % reflection, by the 54th ^ splicer is reflected by the reflective cymbal & reflected back into the light-polarized single tooth 4 'through the penetrating surface 82 and the first light-emitting surface is the same as before' The right blue light and the green light source pass through the second person smooth surface singularity SGB=rr=r to have the first-polar component Pgb and the first: the partial polarization component/, and the partial pole ^PGB will pass through the penetration surface 84. Going to the second full-length 2 variable element 58 to form the second polarization component Sgb, the viewing surface % is extremely eight = is emitted by the first light surface 66; the second partial light surface 62 enters the second partial bias, The amount of SgB will be birefringent The surface 80 is reflected by the fourth light exiting surface 76, and then the reflective film 64 is reflected back to the second light polarizing element 56 by the first light exiting anvil. As can be seen from the above, the first polarization component WsR'' generated by the system is emitted by the first output = of the optical conversion module 52 to provide a light source system 5 having a single polarization component. Please refer to FIG. 3, which is a cross-sectional view of a second embodiment of the light source system of the present invention. In this embodiment, the light source system 1A of the present invention comprises an optical conversion device 102 and a side light source, wherein the red light source 丨36 is disposed on the left side of the optical conversion device, and the blue light and green light source 138 are disposed on the optical conversion mode. Group 1〇2 to the right. The optical conversion device 102 includes a reflective diaphragm 110, a polarization modulation component 108, and first and second optical polarization components 1〇4, 1〇6 are sequentially stacked, wherein the polarization modulation component 108 It is a quarter-phase retardation film that converts linear off-polar light into circularly polarized light.
11 1317825 第-、第二光偏極化元件1〇4、1〇6係平行並排而緊鄰設置,其 材料為雙折射晶體所構成,例如石英、方解石或冰洲石 朵、 偏極化單元綱包含有-第-入光面112、一第一出光面ιΐ4、一 第一出光面m以及-雙折射面118,而第二光偏極化單元1〇6亦 包含有-第-入光面12〇、-第-出光面122、一第二出光面124 以及雙折射面126。其中,雙折射面118、126相鄰於第—入光面 112、120之一面皆為穿透面128、13〇,能讓第i極分量(s偏 極分量)通過,並反射第二偏極分量(p偏極分量),纽面皆為 反射面132、134,能完成反射光線。 白‘、、 本發明光齡統之運作係敘述如下:由左侧紅光光源所產 生的光線為隨機偏極分量,包括第一偏極分量Sr,與第二偏極分量 Pr’ ’由第一入光面112進入第一光偏極化單元1〇4中,其中第一 偏極分量SR,會通過穿透面128而繼續行進至第二光偏極化單元 • 1〇6之内,然後被反射面134反射而由第一出光面122射出;第二 偏極分量pR’則會被雙折射面118反射,由第二出光面116射出, 經由偏極調變元件108轉換為圓偏光,然後被具反射性膜片ιι〇 . 反射後,再經過偏極調變元件108轉換為第一偏極分量Sr,,進入 .第一光偏極單元1〇4中’穿過穿透面128而由第一出光面114射 出。同樣的,右侧藍光、綠光光源所產生的光線包含有第一偏極 — 分量Sgb與第二偏極分量PGB,由第一入光面12〇進入第二光偏極 - 單元106之中,其中第一偏極分量sGB會通過穿透面13〇而進入 a 12 1317825 第一光偏極單元104中,被反射面132反射而由第一出光面ιΐ4 射出,而第二偏極分量PGB則會在進入第二光偏極化單元I%之 ,後,被雙折射面126反射,由第二出光面124射出,經由偏極調 •變元件108轉變為圓偏光,然後被具反射性膜片11〇反射,再經 由偏極調變元件108轉變為第一偏極分量s,接著 化單元106中,穿過穿透面130而由第一出光面122射出。因此, 本發明光源系統1GG之兩侧光源所發出的光線皆會由光學轉換袭 •置102轉換成僅包含有第一偏極分量SGB、SR,的光線,以供具偏 光片的液晶顯示面板利用。 請參考第4圖’第4圖為本發明光偏極元件之光線入射角與分 光透過率的鱗® ’其巾右侧表示絲從光偏極化元件右側射入 光偏極化元件中。由於上述本發明第一、第二實施例所使用的光 偏極化元件對光線入射角會有不同的分光透過率,例如當光線進 入光偏極化元件的入射角為〇。時,大約將近1〇〇%的第二偏極分 量P可以通過雙折射面,而大約〇%的第一偏極分量偏s會被反 射;而當光線入射角為_2〇。時,約有5〇%的第二偏極分量p可通 過光偏極化元件的雙折射面,且另有約職的第—偏極分量s亦 可通過雙折射面,此時雙折射面便無法完全將隨機偏光之光線分 •光為第-偏極分量S與第二偏極分量卩。因此,在上述實施例中, 本發明所使用的紅光、藍光及綠光光源較佳採用具有指向性之 LED光源,即其發光肖度較小,贿證所產生光線能接近垂直射 入光偏極化元件的入光面。11 1317825 The first and second optically polarized elements 1〇4 and 1〇6 are arranged side by side in parallel, and the material is composed of a birefringent crystal, such as quartz, calcite or ice stone, and a polarized element. The first light-emitting surface 112, the first light-emitting surface ιΐ4, the first light-emitting surface m, and the birefringent surface 118 are included, and the second light-polarizing unit 1〇6 also includes a -first-into-light surface. 12〇, a first-light-emitting surface 122, a second light-emitting surface 124, and a birefringent surface 126. Wherein, the birefringent surfaces 118, 126 are adjacent to the first light-incident surface 112, 120, and each of the surfaces is a transmissive surface 128, 13 〇, which allows the ith pole component (s-polar component) to pass through and reflects the second bias The polar component (p-polar component), the neon surface is the reflective surface 132, 134, which can complete the reflected light. The operation of the light age system of the present invention is as follows: the light generated by the left red light source is a random polarization component, including the first polarization component Sr and the second polarization component Pr' A light incident surface 112 enters the first optical polarization unit 1〇4, wherein the first polarization component SR continues to travel through the penetration surface 128 to the second optical polarization unit •1〇6, Then, it is reflected by the reflecting surface 134 and emitted by the first light emitting surface 122. The second polarizing component pR′ is reflected by the birefringent surface 118, is emitted by the second light emitting surface 116, and is converted into circular polarized light by the polarization detecting element 108. Then, it is reflected by the reflective film ιι〇. After being reflected, it is converted into the first polarization component Sr by the polarization modulation element 108, and enters the first light polarization unit 1〇4 to pass through the penetration surface. 128 is emitted by the first light exit surface 114. Similarly, the light generated by the right blue light and the green light source includes a first polarization component Sgb and a second polarization component PGB, and the first light entrance surface 12〇 enters the second light polarization pole unit 106. , wherein the first polarization component sGB enters the a 12 1317825 first light polarization unit 104 through the penetration surface 13 , is reflected by the reflection surface 132 and is emitted by the first light extraction surface ι 4 , and the second polarization component PGB Then, after entering the second optical polarization unit I%, it is reflected by the birefringent surface 126, emitted by the second light-emitting surface 124, converted into circularly polarized light by the polarization detecting element 108, and then reflected. The diaphragm 11 is reflected and converted into a first polarization component s via the polarization modulation element 108, and then passes through the transmission surface 130 and is emitted by the first light exit surface 122. Therefore, the light emitted by the light sources on both sides of the light source system 1GG of the present invention is converted by the optical conversion device 102 into light including only the first polarization component SGB, SR, for the liquid crystal display panel with the polarizer. use. Please refer to Fig. 4'. Fig. 4 is a view showing the incident angle of light and the spectral transmittance of the light-polarizing element of the present invention. The right side of the towel indicates that the filament is incident on the optically polarizing element from the right side of the optical polarization element. Since the optical polarization elements used in the first and second embodiments of the present invention described above have different spectral transmittances for the incident angle of light, for example, when the light enters the optical polarization element, the incident angle is 〇. At this time, approximately 1% of the second polarization component P can pass through the birefringent plane, and approximately 〇% of the first polarization component bias s is reflected; and when the ray incident angle is _2 〇. When about 5〇% of the second polarization component p can pass through the birefringent surface of the optical polarization element, and the corresponding first-polar component s can also pass through the birefringent surface, and the birefringent surface It is impossible to completely separate the light of the random polarization into the first-polar component S and the second polarization component 卩. Therefore, in the above embodiments, the red, blue, and green light sources used in the present invention preferably use a directivity LED light source, that is, the light illuminance is small, and the light generated by the bribe can be nearly perpendicular to the incident light. The light incident surface of the polarized component.
13 1317825 ' &本發_優點在於紅絲源錢、絲光縣分開放置,所以 ,能針對不關色絲㈣性’祕統线另設控树或散 • 熱I置’而使絲系統有最佳的光學效果與操作狀態。 值得注意献,纟於不眺長的光其折射率也不同,例如藍光 折射率最大,脉光卿率最小,因此,為了使各色絲進入光 鲁偏極化元件後有相同的投影面積,以提供較佳的混光效果,因此 本發明光源紐100可另包含—折射調控則,關整不同顏色 光源的投影面積。請參考第5圖,第5圖為本發明光源系統第三 實施例的勤示意圖,其巾各元件m第3圖之元件符號。如 第5圖所示,由於紅光折射角度最小,因此投影面積也最小。為 了提供相當域光或綠光的投影面積,可在左侧紅光光源⑶與 第一光偏極化元件104之間設置一折射調控膜片14〇,以改變紅光 的折射角度,使得紅光射人第—賴極元件1G4以後的投影面積 •、約略相同於右側藍光、綠光光源138所產生藍光與綠光入射至第 二光偏極化元件1〇6後的投影面積。在本實施例中,折射調控膜 片140係為一薄膜,可直接黏貼於第一光偏極化元件1〇4的第一 入光面112表面。在其他實施例中,折射調控膜片14〇亦可直接 貼於紅光光源136的LED表面,來調整紅光的投影面積。 此外’傳統紅光LED的發光強度較藍光LED與綠光LED更容 易因溫度升高而衰減,因此當紅光LED光源皆設於光源系統1〇〇13 1317825 ' & this hair _ advantage lies in the red silk source money, Seiko County separate placement, so, can be set for the non-color silk (four) sex 'secret line to control the tree or disperse · heat I set 'the silk system has The best optical effects and operating conditions. It is worth noting that the refractive index of the light that is not long is different, for example, the maximum refractive index of blue light and the minimum pulse light rate. Therefore, in order to make each color silk have the same projected area after entering the light-polarized component, Providing a better light mixing effect, the light source button 100 of the present invention may further comprise a refractive adjustment to close the projected area of the different color light sources. Please refer to FIG. 5, which is a schematic diagram of the third embodiment of the light source system of the present invention, and the component symbols of the third component of the device. As shown in Figure 5, since the red light has the smallest angle of refraction, the projected area is also the smallest. In order to provide a projected area of considerable field light or green light, a refraction regulating film 14A may be disposed between the left red light source (3) and the first optical polarization element 104 to change the refractive angle of the red light so that red The projection area after the light-emitting person first-difference element 1G4 is approximately the same as the projected area of the blue light and the green light source 138 generated by the right side and the green light source 138 is incident on the second light polarization element 1〇6. In the present embodiment, the refractive control film 140 is a film which can be directly adhered to the surface of the first light incident surface 112 of the first optical polarization element 1〇4. In other embodiments, the refractive control diaphragm 14 can also be directly attached to the surface of the LED of the red light source 136 to adjust the projected area of the red light. In addition, the luminous intensity of the traditional red LED is more likely to be attenuated by the increase of temperature than the blue LED and the green LED, so when the red LED source is set in the light source system 1〇〇
14 1317825 之左側時’可於光源系統100的左側針對紅光LED設置散熱裝 置,例如銅製散熱片,而右側藍、綠光led附近可視情況亦設置 散熱材料成本較低的散熱片’例如銘製散熱片,以控制並降低光 源系統100的製作材料與成本,同時提供光源系統100較良好的 操作環境。 再者’為了進一步改良混光效果,可於第三實施例之光源系統 100的前後兩侧另分別設置一藍光、綠光光源以及一紅光光源。請 參考第6圖,第6圖為本發明光源系統第四實施例的示意圖,其 中圖(A)為俯視圖,圖(B)為後側側視圖,圖(c)為左侧側 視圖,而圖(D)為右侧侧視圖。由圖(a)可知,本實施例在第 一光偏極化元件104的前側另設置了藍光與綠光光源’而在第二 光偏極化元件106的後側另設置了一紅光光源。此外,為了同樣 將設於前、後侧的光源皆轉換為單一偏極分量,因此第一、第二 光偏極化元件104、106皆另包含有一第二雙折射面142、144,如 圖(C)、圖(D)所示。更進一步地,如第7圖本發明光源系統 第五實施例的俯視示意圖所示,在第一光偏極化元件1〇4的後側 亦可另設置一紅光光源’而在第二光偏極化元件106的前側可再 另設置一藍、綠光光源,來提高光源系統1〇〇之亮度。 然而’在其他實施例中,光源模組1〇〇可依照液晶顯示器對色 溫的需求與喜好,而以不同顏色的光源取代設於光源系統100前 後侧的光源顏色,如第8圖本發明光源系統第六實施例的俯視示14 1317825 On the left side of the light source system 100, a heat sink can be provided for the red LED on the left side of the light source system 100, such as a copper heat sink, and a heat sink with a lower heat dissipation material can be disposed near the blue and green light LEDs on the right side. The heat sink is used to control and reduce the material and cost of the light source system 100 while providing a better operating environment for the light source system 100. Further, in order to further improve the light mixing effect, a blue light, a green light source, and a red light source may be separately disposed on the front and rear sides of the light source system 100 of the third embodiment. Please refer to FIG. 6. FIG. 6 is a schematic view showing a fourth embodiment of the light source system according to the present invention, wherein (A) is a plan view, (B) is a rear side view, and (c) is a left side view, and Figure (D) is a side view of the right side. As shown in FIG. (a), in this embodiment, a blue light and a green light source are disposed on the front side of the first optical polarization element 104, and a red light source is disposed on the rear side of the second optical polarization element 106. . In addition, in order to convert the light sources disposed on the front and rear sides into a single polarization component, the first and second optical polarization elements 104 and 106 further include a second birefringence surface 142, 144, as shown in the figure. (C) and (D). Further, as shown in the top view of the fifth embodiment of the light source system of the present invention, a red light source 'and a second light source may be disposed on the rear side of the first optical polarization element 1〇4. A blue and green light source may be further disposed on the front side of the polarization element 106 to increase the brightness of the light source system. However, in other embodiments, the light source module 1 can replace the color of the light source disposed on the front and rear sides of the light source system 100 with the light source of different colors according to the requirement and preference of the liquid crystal display for color temperature, as shown in FIG. Top view of the sixth embodiment of the system
15 1317825 意圖所示。 , 請參考第9圖’第9圖為本發明光源系統第七實施例的俯視示 意圖。本實施例之光源系統200可包含有複數個如第三圖或第四 圖所示之光學觀敝’互相麟設置,_成大尺寸的光源系 統200。圖中標號202所示元件即表示各光學轉換模组2〇2,其皆 包含有一第一光偏極化元件2〇4、一第二光偏極化元件2〇6以及至 籲少-偏極調變元件(圖未示)設於第一、第二光偏極化元件綱、 206下方或兩者之間’此外,第一光偏極化元件綱與第二光偏極 化兀件206下方另可選擇性設置一具反射性膜片(圖未示)。前後 相鄰的光學轉換模組202之間係設置紅光光源,且該紅光光源可 為兩面發光的紅紅ED ’或分縣_分_前、後二光學轉換 模組202發光的紅光光源。此外,左右並排的光學轉換模組加 之間亦設置有藍光與綠光光源,·地,職光、綠光光源可為 籲 _發光之光源,或分別為朝左、右兩側發光的不同光源。 本實施例的好處是可彻複數個光學轉換模組2〇2並排以形成 兩的:H系4测作為背光拉組,同時能提供液晶顯示面板所 nr 作較高光_用效率的大尺寸液晶顯示 器。再者,由於所有紅光光源皆相鄰排列呈― 不器可特情紅絲源設置處t * 、βθ’’、 步提#〜s “丨辑㈣散熱城,以進— 光源,各光學轉換模組2〇2側邊與之間的彩色 '、列方式並不限於本實施例所揭露者。15 1317825 The intention is shown. Please refer to Fig. 9'. Fig. 9 is a plan view showing a seventh embodiment of the light source system of the present invention. The light source system 200 of the present embodiment may include a plurality of light source systems 200 having a large size as shown in the third or fourth figure. The components shown by reference numeral 202 in the figure represent the optical conversion modules 2〇2, which all include a first optical polarization element 2〇4, a second optical polarization element 2〇6, and a low-to-bias A polar modulation component (not shown) is disposed between the first and second polarization polarization elements, 206, or both. Further, the first optical polarization component and the second optical polarization component A reflective diaphragm (not shown) can be optionally disposed under the 206. A red light source is disposed between the adjacent optical conversion modules 202, and the red light source can be a red ED of two-sided illumination or a red light emitted by the optical conversion module 202. light source. In addition, the left and right side of the optical conversion module is also provided with a blue light and a green light source. · The ground light, the green light source can be the light source of the light, or the different light sources that are respectively illuminated to the left and right sides. . The advantage of this embodiment is that a plurality of optical conversion modules 2〇2 can be arranged side by side to form two: H-series 4 is used as a backlight pull group, and at the same time, a large-size liquid crystal with high efficiency of liquid crystal display panel can be provided. monitor. Furthermore, since all the red light sources are arranged adjacent to each other, there is no need to set the red wire source at t*, βθ'', step ##ss, "丨" (4) heat dissipation, to enter - light source, each optics The color ', column mode between the sides of the conversion module 2 〇 2 is not limited to those disclosed in the embodiment.
16 1317825 . 請參考第10圖,第10圖為第9圖所示光學轉換模組202的外 觀示意圖,其中第10圖僅繪出第一與第二光偏極化元件204、 206。為了能節省光源系統200的整體空間,也避免各光源在並排 的光學轉換模組202之間成為明顯的彩色點光源,因此第一與第 二光偏極化元件204、206可於其侧面另包含有光源設置槽2〇8、 210’其為第一與第二光偏極化元件2〇4、206側面上内凹之凹槽, 以使光源可以内藏於第一與第二光偏極化元件2〇4、2〇6内部。以 第9圖左上角的光學轉換模組2〇2為例,各光源設置槽2〇8可放 置一紅光LED,而光源設置槽210可放置一包含有藍、綠光led 晶片的藍綠光LED。如此,俯視光源系統2〇〇時,便不易明顯看 到設置於光學轉換模組202内部的點光源,且光源所產生之光線 能直接入射光第一、第二光偏極化元件2〇4、2〇6而充分混光。 凊參考第11圖’第11圖為本發明—液晶顯示器的外觀爆炸示 齡思圖。本發明液晶顯示器300包含有一液晶顯示面板3〇2,其上、 下兩侧分別設有-偏光片304、306。且液晶顯示 器300另包含有 背光模組314,其包含第9圖所示之本發明光源系統2〇〇以及一 外框308。其中,外框308左、右兩侧分別設置散熱裝置31〇、312, _ 2針,紅光光源提供較佳的散熱環境,例如銅製散熱片。值得注 似的疋㈣光源系統2〇〇本身已包含具反射性膜片設置於其下 部,因此背光模組314的外框308上不需另設置反射片。 17 1317825 此外,由於光源系統200已提供具有高混光效果且具有單一偏 極方向的光線,因此光源系統200上方不需另設置稜鏡片或擴散 片,可降低材料成本以及空間。然而,在其他實施例中,光源系 統200上方與液晶顯示面板302之間亦可設置不會改變偏極特性 之擴散膜片,以霧化LED光源設置之區域。再者,當光源系統2〇〇 的分光效果良好而能提供完全只有單一偏極方線的偏極分量時, 可視情況省略液晶顯示面板12下方的偏光片16之元件設置。 因此,本發明光源系統的作用原理係如第12圖所示,首先,由 LED光源400所產生的光線會經由光學轉換模組的光偏極化元件 402而分成第一偏極分量與第二偏極分量,再經由偏極調變元件 404將第二偏極分量轉變為第一偏極分量,以使轉變為第一偏極分 量的光線進入具偏光片或偏光板的液晶顯示面板4〇6中。 相較於習知技術’本發明係將特性不同的彩色光源分別設置於 光偏極化70剌不_面’絲色紐能於光雜化元件内充分 混光,並藉由光偏極化元件的分紐f而將规轉換成單一偏極 分量,以提供色溫較佳的白色光源給液晶顯示面板,同時液晶顯 示面板的光_率亦能提高至少為嶋。此外,由於不同色光源 系分财置,因此本發明可針對特定顏色光源做散熱設計,以延 長使用^卩並改善光學效果。此外,本發明光齡統不只可應用 於液晶顯示H ’亦可顧於其他需要#光源的平面顯示器。16 1317825. Please refer to FIG. 10, which is a schematic diagram of the appearance of the optical conversion module 202 shown in FIG. 9, wherein FIG. 10 only depicts the first and second optical polarization elements 204, 206. In order to save the overall space of the light source system 200, and also to avoid the light source becoming a distinct color point light source between the side-by-side optical conversion modules 202, the first and second optical polarization elements 204, 206 can be The light source providing groove 2〇8, 210' is a concave groove on the side surfaces of the first and second optical polarization elements 2〇4, 206, so that the light source can be embedded in the first and second light deviations The polarizing elements 2〇4, 2〇6 are internal. Taking the optical conversion module 2〇2 in the upper left corner of FIG. 9 as an example, each light source setting slot 2〇8 can be placed with a red LED, and the light source setting slot 210 can be placed with a blue-green color containing blue and green led chips. Light LED. Thus, when the light source system 2 is viewed from above, the point light source disposed inside the optical conversion module 202 is not easily visible, and the light generated by the light source can directly enter the first and second optical polarization elements 2〇4. 2,6 and fully mixed light. Referring to Fig. 11 and Fig. 11 is a perspective view of the appearance of an explosion of the liquid crystal display of the present invention. The liquid crystal display device 300 of the present invention comprises a liquid crystal display panel 3〇2, and the polarizing plates 304 and 306 are respectively disposed on the upper and lower sides thereof. The liquid crystal display device 300 further includes a backlight module 314 including the light source system 2A of the present invention and an outer frame 308 shown in FIG. Wherein, the left and right sides of the outer frame 308 are respectively provided with heat dissipating devices 31 〇, 312, _ 2 pins, and the red light source provides a better heat dissipation environment, such as a copper heat sink. It is worth noting that the 光源 (4) light source system 2 已 itself already includes a reflective film disposed on the lower portion thereof, so that the outer frame 308 of the backlight module 314 does not need to be provided with a reflective sheet. 17 1317825 In addition, since the light source system 200 has provided light having a high light mixing effect and having a single polarization direction, there is no need to provide a cymbal or a diffusion sheet above the light source system 200, which can reduce material cost and space. However, in other embodiments, a diffusion film that does not change the polarization characteristics may be disposed between the light source system 200 and the liquid crystal display panel 302 to atomize the region where the LED light source is disposed. Further, when the light splitting effect of the light source system 2 is good and the polarization component of only a single polarized square wire can be provided, the component arrangement of the polarizer 16 below the liquid crystal display panel 12 can be omitted as appropriate. Therefore, the principle of operation of the light source system of the present invention is as shown in FIG. 12. First, the light generated by the LED light source 400 is divided into a first polarization component and a second light via the optical polarization component 402 of the optical conversion module. The polarization component is further converted into a first polarization component by the polarization modulation component 404, so that the light converted into the first polarization component enters the liquid crystal display panel 4 with the polarizer or the polarizing plate. 6 in. Compared with the prior art, the present invention sets different color light sources with different characteristics to the optical polarization 70, and the blue color can be fully mixed in the optical hybrid element, and is polarized by light. The component f is converted into a single polarization component to provide a white light source with a better color temperature to the liquid crystal display panel, and the light transmittance of the liquid crystal display panel can be increased by at least 嶋. In addition, since the different color light sources are distributed, the present invention can be designed for heat dissipation of a specific color light source to extend the use and improve the optical effect. In addition, the light age system of the present invention can be applied not only to the liquid crystal display H' but also to other flat displays requiring a #light source.
18 1317825 以上所述僅為本發明之較佳實施例,凡依本發明申請專利範圍 所做之均等變化與修飾,皆應屬本發明之涵蓋範圍。 【圖式簡單說明】 第1圖為習知一液晶顯示器的構造爆炸圖。 第2圖為本發明光源系統之第一實施例的側面示意圖。 第3圖為本發明光源系統之第二實施例的剖面示意圖。 I 第4圖為本發明光偏極元件之光線入射角與分光透過率的曲線圖。 第5圖為本發明光源系統第三實施例的剖面示意圖。 第6圖為本發明光源系統第四實施例的示意圖。 第7圖為本發明光源系統第五實施例的俯視示意圖。 第8圖為本發明光源系統第六實施例的俯視示意圖。 第9圖為本發明光源系統第七實施例的俯視示意圖。 第1〇圖為第9圖所示光學轉換模組的外觀示意圖。 第11圖為本發明一液晶顯示器的外觀爆炸示意圖。 ® 第12圖為本發明光源系統的作用原理流程示意圖。 【主要元件符號說明】 10 液晶顯示器 12 液晶顯示器面板 14 第二偏光片 16 第一偏光片 18 背光模組 20 光源 22 散熱片 24 導光板 26 反射片 28 第一擴散片 19 131782518 1317825 The above is only the preferred embodiment of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural exploded view of a conventional liquid crystal display. Figure 2 is a side elevational view of a first embodiment of a light source system of the present invention. Figure 3 is a cross-sectional view showing a second embodiment of the light source system of the present invention. I Fig. 4 is a graph showing the incident angle of light and the spectral transmittance of the light-polarizing element of the present invention. Figure 5 is a cross-sectional view showing a third embodiment of the light source system of the present invention. Figure 6 is a schematic view showing a fourth embodiment of the light source system of the present invention. Figure 7 is a top plan view of a fifth embodiment of the light source system of the present invention. Figure 8 is a top plan view of a sixth embodiment of the light source system of the present invention. Figure 9 is a top plan view showing a seventh embodiment of the light source system of the present invention. The first drawing is a schematic view of the appearance of the optical conversion module shown in FIG. Figure 11 is a schematic exploded view of the appearance of a liquid crystal display of the present invention. ® Fig. 12 is a schematic flow chart showing the principle of operation of the light source system of the present invention. [Main component symbol description] 10 LCD monitor 12 LCD panel 14 Second polarizer 16 First polarizer 18 Backlight module 20 Light source 22 Heat sink 24 Light guide plate 26 Reflector 28 First diffuser 19 1317825
30、32 棱鏡片 34 50 光源系統 52 54 第一偏極化元件 56 58 偏振調變元件 60 62 第二入光面 64 66'68 第一出光面 70、72 74 第三出光面 76 78、80 雙折射面 82、84 86、88 反射面 100 102 光學轉換模組 104、204 第一光偏極化元件 106 ' 206 第'一光偏極化元件 108 偏極調變元件 110 112 、 120 第一入光面 114、122 116 、 124 第二出光面 118 、 126 128、130穿透面 132 、 134 136、138 光源 140 142、144第二雙折射面 200 202 光學轉換模組 208 > 210 300 液晶顯示器 302 304、306偏光片 308 310、312散熱裝置 314 400 LED光源 402 第二擴散片 光學轉換模組 第一光偏極化元件 第一入光面 具反射性膜片 第—出光面 第四出光面 穿透面 光源系統 具反射性膜片 第一出光面 雙折射面 反射面 調控膜片 光源系統 光源設置槽 液晶顯示面板 外框 背光模組 光偏極化元件 20 1317825 液晶顯示面板 404 偏極調變元件 40630, 32 prism sheet 34 50 light source system 52 54 first polarizing element 56 58 polarization adjusting element 60 62 second light incident surface 64 66'68 first light emitting surface 70, 72 74 third light emitting surface 76 78, 80 Birefringent surface 82, 84 86, 88 Reflecting surface 100 102 Optical conversion module 104, 204 First optical polarization element 106' 206 First optical polarization element 108 Polarization modulation element 110 112, 120 First Light-incident surface 114, 122 116, 124 second light-emitting surface 118, 126 128, 130 penetration surface 132, 134 136, 138 light source 140 142, 144 second birefringence surface 200 202 optical conversion module 208 > 210 300 liquid crystal Display 302 304, 306 polarizer 308 310, 312 heat sink 314 400 LED light source 402 second diffuser optical conversion module first optical polarizing element first light mask reflective diaphragm - light exit surface fourth light surface Penetrating surface light source system with reflective diaphragm first light-emitting surface birefringent surface reflecting surface control diaphragm light source system light source setting slot liquid crystal display panel outer frame backlight module light polarization element 20 1317825 liquid crystal display panel 404 Modulation element 406
21twenty one
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