M270376 八、新型說明： 【新型所屬之技術領域】 本創作係關於一種光源及應用該光源之背光模組，尤其係關 於一種用於液晶顯示裝置之光源及應用該光源之背光模組。 【先前技術】 因液晶顯示裝置面板中之液晶本身不發光，為達到顯示效 果，須給液晶顯示裝置面板提供一面光源裝置，如背光模組，其 功能在於向液晶顯示裝置面板提供輝度充分且分佈均勻之平面 光，使其能正常顯示影像，因而成為液晶顯示裝置之關鍵組件之 ——〇 k著液晶顯示裝置應用領域之不斷拓展，特別是數位影像產 品之應用，如手機、手機用數位相機、數位攝影機等，對於液晶 顯示裝置之背光模組之出光輝度要求進一步提昇。 通常背光模組之導光板僅能將光線均勻化，而不能提高出光 之輝度，因此要提高背光模組之出光輝度，需從提高光源輝度入 請參閱第一圖，係2003年8月19日公告之美國專利第 6, 608, 614號所揭示之一種先前技術背光模組示意圖。該背光模組 包括一光源10及一導光板20，該光源1〇係發光二極體陣列式光 源，其主要包括基板11及設置於基板11上之發光二極體12陣列， 且該背光模組與液晶顯示裝置之面板30相對設置。 請參閱第二圖，係該背光模組光源10之平面示意圖。該背光 M270376 模組10包括基板11與發光二極體12陣列，且該發光二極體12 陣列包括紅色發光二極體12R、綠色發光二極體12G及藍色發光二 極體12B。該光源1〇利用三基色發光二極體12R、12g、12B發出 二種單色光混合為白光，從而達到供應光線之功效。然，單以三 種單色光之自然混合為白光效果有限，其出光輝度有待提高。 有鑑於此，提供一種出光輝度高之光源與背光模組實為必需。 【新型内容】 本創作之目的在於提供一種出光輝度高之光源。 本創作之另一目的在於提供一種採用上述光源之背光模組。 本創作之光源包括一發光二極體陣列，一供應該發光二極體 陣列電源之驅動電路，其中該光源還包括設置於該發光二極體陣 列上之光栅。 本創作之背光模組包括一光源及一相對該光源設置之導光 板，該光源包括一發光二極體陣列，一供應該發光二極體陣列電 源之驅動電路，其中該光源還包括設置於該發光二極體陣列上之 光栅。 相車父於先别技術’本創作之光源在發光二極體陣列上設置光 栅，利用光柵方向及週期設定，調整光柵單元之光柵間距及光栅 方向，混合為出光輝度高之白光光源。 【實施方式】 清參閱第二圖至第五圖，本創作光源4包括一發光二極體陣 列45、一供應該發光二極體陣列45電源之驅動電路幻與一設置 6 M270376 於該發光二極體陣列45卜 <先柵4丨。該發光二極體陣列45設置 於一基板42上，其包括複數相鄰設置成-組之紅(R)、綠(G)、藍 (，三基色發光二極體46、47、妨；該光栅41包括複數獨立光桃 —每個光柵單元_ —瓣光二極體，針對賴發光二極 4出之單色A彻妓柵單元44之光柵間距及光柵方向之設 定’使該顆發光二極體發出之單色光朝預定方向散光。 口月參閱第”圖，係本創作光源4之光栅散光原理示意圖。光 栅係折射率週期變化之結構，此處定義一穿透式週期性光桃及 ，其中a為光柵週期，A為光柵總長度，b為光柵寬度，a之 數I級為光波長等級，A及b遠大於光波長。光人射至平面， 因繞射作用發生之條件為縫隙寬度至少在人射光波等級以下，而a 之數置級為光波鮮級，因此沿χ方向會產生餘紐射現象而將 光沿X方向散開；但b遠大於光波波長，所以沿ζ方向不形成繞 射光，.而絲會沿ζ方向將光散開。沿χ方向之散色光可分為許 多階光，每階光有不同之散射角Θ m，散射角0 m與入射光波長及 光柵週期a及階數之關係為：asin0m=m又；因此，沿χ方向之散 射光可經由a及入射光波長之改變而加以控制，而本創作之光源 可使同組三基色發光二極體發出之光匯聚在一起，形成白光。 請參閱第七圖，係本創作背光模組之示意圖。該背光模組6 包括一導光板60與一前述光源4，該導光板60包括一入光面63、 一與該入光面63相對之出光面62及複數側面61，該光源4相對 該入光面63設置。光源4通過混合同組三基色發光二極體46、47、 M270376 48發出之光’形成白光經入光面63進入導光板6〇，在導光板6〇 内k政亂反射後從出光面62射出。 相較於先前技術，因本創作採用多基色發光二極體陣列作為 光源’其上設置散射光柵，通過調整光柵單元之光栅間距及光栅 方向’混合為出光輝度高之白光光源，且此種光源之均勻度比使 用擴散片而形成之光源之均勻度高；又，發光二極體陣列可配合 不同之陣列設計要求，而設計光柵中之光柵單元，可塑性高。 本創作之光源與背光模組並不限於本實施方式所述，如該背 光模組還可進一步包括增光片、擴散片、反射片及偏光片等。 綜上所述，本創作確已符合新型專利之要件，爰依法提出專 利申％。惟，以上所述者僅為本創作之較佳實施方式，本創作之 範圍並不以上述實施方式為限，舉凡熟習本案技藝之人士援依本 創作之精神所作之等效修飾或變化，皆應涵蓋於以下申請專利範 圍内。· 【圖式簡單說明】 第一圖係一種先前技術背光模組之示意圖。 第一圖係第一圖中先前技術背光模組之光源之示意圖。 第三圖係本創作光源之示意圖。 第四圖係本創作光源之發光二極體陣列之示意圖。 第五圖係本創作光源之光柵立體之示意圖。 第六圖係本創作光源之光栅散光原理示意圖。 第七圖係本創作背光模組之示意圖。 M270376 【主要元件符號說明】 光源 4 基板 42 光栅 41 驅動電路 43 光柵單元 44 發光二極體 46、47、48 背光模組 6 導光板 60 出光面 62 入光面 63 側面 61 9M270376 8. Description of the new type: [Technical field to which the new type belongs] This creation relates to a light source and a backlight module using the light source, and particularly relates to a light source for a liquid crystal display device and a backlight module using the light source. [Previous technology] Because the liquid crystal in the liquid crystal display device panel does not emit light, in order to achieve the display effect, it is necessary to provide a liquid crystal display device panel with a side light source device, such as a backlight module, whose function is to provide sufficient brightness and distribution to the liquid crystal display device panel. Uniform flat light makes it possible to display images normally, so it has become a key component of liquid crystal display devices. 〇k continues to expand the application field of liquid crystal display devices, especially the application of digital imaging products, such as mobile phones, digital cameras for mobile phones. , Digital cameras, etc., the brightness of the backlight module of the liquid crystal display device is required to be further improved. Generally, the light guide plate of the backlight module can only homogenize the light, but cannot improve the brightness of the light. Therefore, to increase the brightness of the backlight module, you need to increase the brightness of the light source. Please refer to the first figure, which is August 19, 2003. A schematic diagram of a prior art backlight module disclosed in published US Patent No. 6,608,614. The backlight module includes a light source 10 and a light guide plate 20. The light source 10 is a light-emitting diode array light source, which mainly includes a substrate 11 and an array of light-emitting diodes 12 arranged on the substrate 11. The group is disposed opposite to the panel 30 of the liquid crystal display device. Please refer to the second figure, which is a schematic plan view of the backlight module light source 10. The backlight M270376 module 10 includes a substrate 11 and an array of light emitting diodes 12, and the array of light emitting diodes 12 includes a red light emitting diode 12R, a green light emitting diode 12G, and a blue light emitting diode 12B. The light source 10 uses three primary color light emitting diodes 12R, 12g, and 12B to emit two kinds of monochromatic light and mix them into white light, thereby achieving the effect of supplying light. However, the white light effect is limited by the natural mixing of three kinds of monochromatic light, and its output brightness needs to be improved. In view of this, it is really necessary to provide a light source and a backlight module with high brightness. [New content] The purpose of this creation is to provide a light source with high brightness. Another purpose of this creation is to provide a backlight module using the above-mentioned light source. The light source of this creation includes a light emitting diode array and a driving circuit for supplying power to the light emitting diode array, wherein the light source further includes a grating disposed on the light emitting diode array. The created backlight module includes a light source and a light guide plate disposed opposite the light source. The light source includes a light-emitting diode array and a driving circuit for supplying the light-emitting diode array power. The light source further includes a light-emitting diode array. Grating on light emitting diode array. The light source created by the photo car father's previous technology is to set a light grid on the light-emitting diode array, and use the grating direction and period settings to adjust the grating pitch and direction of the grating unit, and mix it into a white light source with high brightness. [Embodiment] Referring to the second to fifth figures, the creative light source 4 includes a light-emitting diode array 45, a driving circuit for supplying power to the light-emitting diode array 45, and a setting 6 M270376 in the light-emitting diode 2. The polar array 45b < first grid 4 丨. The light-emitting diode array 45 is disposed on a substrate 42 and includes a plurality of red (R), green (G), and blue (three-primary-color light-emitting diodes 46, 47, and 40) arranged adjacently in a group; the The grating 41 includes a plurality of independent light peaches—each grating unit—a petal light diode, and the setting of the grating pitch and the grating direction of the monochromatic A grid grid unit 44 of the light emitting diode 4 is used to make the light emitting diode The monochromatic light emitted by the body is scattered in a predetermined direction. Refer to the figure, which is a schematic diagram of the principle of grating astigmatism in this creative light source 4. The grating is a structure that changes the refractive index periodically. Here, a penetrating periodic light is defined. Where a is the grating period, A is the total length of the grating, b is the grating width, the number of a is the light wavelength level, and A and b are much larger than the light wavelength. The light is incident on the plane, and the conditions for diffraction to occur are: The gap width is at least below the level of the human light wave, and the number a is set to the light wave fresh level, so a coherence phenomenon will occur in the χ direction to spread the light in the X direction; but b is far larger than the wavelength of the light wave, so it is in the ζ direction. No diffracted light is formed, and the filament will spread the light in the z direction. The scattered light along the χ direction can be divided into many orders of light, each order of light has a different scattering angle Θ m, the relationship between the scattering angle 0 m and the incident light wavelength and the grating period a and order are: asin0m = m and; The scattered light along the χ direction can be controlled by a and the change of the wavelength of the incident light, and the light source in this creation can condense the light emitted by the same group of three primary color light-emitting diodes to form white light. See the seventh figure, The backlight module 6 is a schematic diagram of the creative backlight module. The backlight module 6 includes a light guide plate 60 and a light source 4 as described above. The light guide plate 60 includes a light incident surface 63, a light emitting surface 62 opposite to the light incident surface 63, and a plurality of light emitting surfaces. On the side 61, the light source 4 is disposed opposite to the light incident surface 63. The light source 4 forms white light through the light incident surface 63 and enters the light guide plate 60 by mixing the light emitted from the three primary color light emitting diodes 46, 47, and M270376 48 of the same group. The light guide plate 60 is reflected by the political disorder and emitted from the light emitting surface 62. Compared with the prior art, due to the use of a multi-primary color light emitting diode array as the light source, a scattering grating is set thereon, and by adjusting the grating pitch and Grating direction 'mixed into light A white light source with high brightness, and the uniformity of such a light source is higher than that of a light source formed by using a diffusion sheet; in addition, the light emitting diode array can meet different array design requirements, and the grating unit in the grating can be designed to be plastic. High. The light source and backlight module of this creation are not limited to those described in this embodiment. For example, the backlight module may further include a light-enhancing sheet, a diffusion sheet, a reflective sheet, a polarizing sheet, etc. In summary, this creation has indeed In accordance with the requirements of the new patent, the patent application is filed in accordance with the law. However, the above is only a preferred implementation of this creation, and the scope of this creation is not limited to the above implementation. Those who are familiar with the skills of this case will rely on it. The equivalent modifications or changes made by the spirit of this creation should be covered by the following patent applications. [Simple illustration of the drawings] The first diagram is a schematic diagram of a prior art backlight module. The first diagram is a schematic diagram of the light source of the prior art backlight module in the first diagram. The third picture is a schematic diagram of the light source of this creation. The fourth figure is a schematic diagram of the light emitting diode array of the creative light source. The fifth picture is a schematic diagram of the three-dimensional grating of the original light source. The sixth diagram is a schematic diagram of the principle of grating astigmatism of this creative light source. The seventh figure is a schematic diagram of the backlight module of this creation. M270376 [Description of main component symbols] Light source 4 Substrate 42 Grating 41 Driving circuit 43 Grating unit 44 Light-emitting diode 46, 47, 48 Backlight module 6 Light guide plate 60 Light emitting surface 62 Light incident surface 63 Side 61 61