200949371 六、發明說明： 【發明所屬之技術領域】 本發明涉及-種翻於可發光之產品之背辆'㈣光模組。 【先前技術】 责光模組的應用十分普遍’舉凡筆記型電腦、顯示器、手機、 液晶電視、…等顯示器本身不會發光的電子設備都需要背光模組 來提供光源。 Ο -般的背光模組包含有導光板與統，對於機體厚度要求較 薄的電子產品而言’通常是使用led做為光源，並將該光源設於 ‘光板侧邊的入光面，導光板的第一侧面則設置—反射片，相對 的第二側面做為出光面並設置由擴散片與增光片等所組成的複數 光學膜片。光源所發出的光線由入光面投射進入導光板内傳遞， 部分光線由反射片反射，再依序從出光面通過擴散片與增光片射 〇 出。 面積不太大的導光板，通常僅在其一側邊形成入光面並安裝 光源’且基於LED所發射的光線具有良好指向性的原因，一般都 在導光板的入光面設置複數個光源，使該等光源將光線射入導光 板’讓導光板的出光面呈現出較均勻的亮度。惟，光源愈多，代 表著材料成本愈高，且維修替換時所耗費的人力與工時也較多。 此外，對於面積稍大一點的導光板而言，若光源僅安裝在導 光板一端，則投射進入導光板後的光線在傳導到另一端時會逐漸 200949371 哀減，造鱗光板整個出絲職度不均勻的狀況 •醜，對於僅在矩形導光板單邊設置光源的背光模組，習知咐 良方案’是在相對於出光面的導光板另一側形成斜面，亦即使導 献形成為娜狀，其厚度的變化由人光面的-端往相對另一端 王由大逐漸變小，企圖使出光面的輝度維持均勻。 台灣公開號細63_專利案，係揭露-種利用高照明度、 南效能與高輝度的單點光源結合於導光板，用以減少光源的數量 ❹而止圖降低成本，惟，其缺點在於，無論從哪個角度進行入光照 都會因為光源的效能太強而難以控㈣光模組出光面的均句 台灣公告號M321113專利案所揭露的利用單點光源的導光 板，主要特徵則是在導光板佈設複數點狀結構，單一光源則從導 光板一侧射人導光板，其效果實質上與離的習知技術並^大 差異。 — © 公灣公告號1264596專利案，係在直下式單一光源前方增加 透鏡片，轉直下式單-燈源轉換柄㈣光之背雜組，但其 所使用的空間仍嫌太大。 台灣公告號Μ316410、Μ29872卜530596等專利案，均提供一 種將光源設於矩形導光板之角落的設計；惟，其所使用的導光板 皆為前述習知均-厚度的導光板或是楔形導光板，因此均必須辅 以數個光源才可以保證出光面的均勻度。 此外，單點光源背光模組的需求還包括有以下幾個原因： 200949371 明:m‘光、5效能的照明光_續被發 照明。、’、、可此只品要單點光源就可以提供足夠的 ί利㈣製造組裝、維修替換可節省人力與工時， 43· ίί^Ιί可f減低生產製造成本。 光源整ϋ為單二光源亦同或者不同性質之 今單-光源之背光1且、。使/、先仃此光後再配合導光板佈設成 5· iSiSf ’'可絲於上述理__商提供單- 〇 【發明内容】 本發明的目的’在於解決習知背光模組在其導光板設置單一 光源，或將複數統從導光板祕投機人導絲時，均無法有 效地使出光面獲得足夠均勾性及輝度的問題。 本發明提供料-光_#光模組，主要賴是在導光板側 邊的-個位置設置單一光源，且導光板每一點位置的厚度，係依 © 獻光面與所義位置的距離增加*呈正比例地減小。 本發明的技術手段，係提供—導光板與—光源，並在導光板 側邊的-條置形成—人光面，該人光面的厚度為最大，從該入 光面在導缺的其絲-位置舰伸的轉歧卿度愈小，藉 以僅利用單-絲將光線從人光面投射進人導光板⑽遞，便可 以在導光板的出光面呈現出均勻的亮度與輝度。 一做為-種選擇，本發明的導光板可以是諸如正方形、長方形、 —角形、菱形、…等多邊形，也可以是圓形。 5 200949371 做為另一種選擇，本發明可以將多邊形導光板的一個角端或 是一邊形成入光面，並將光源設於該入光面。 做為再一種選擇，本發明也可以在圓形的導光板邊緣一位置 形成入光面，並將光源設於該入光面。 本發明設於所述多邊形或圓形導光板的入光面，可以是直形 的平面，也可以是缺口形的凹面。 〇 【實施方式】 以下配合圖式對本發明的實施例做更詳細的說明，俾使任何 熟習該項技藝者在研讀本專利說明書後能據以實施。 第一圖與第二圖為顯示本發明以矩形導光板1配合光源2構 成背光模組的實施例，其中，導光板1的一侧面以其周邊輪廓所 構成的範圍形成為出光面12，並在該矩形導光板1的其中一角端 形成一入光面11，所述入光面11可以是將導光板的角端倒角後形 ❹成的直形平面（如第一圖所示），也可以是從角端形成一缺口形態 的凹面（如第二圖所示）；光源2則安裝於該入光面11，使光源產 生的光線付以從入光面11投射進入導光板内傳遞。所述出光面12 可以依實際需要設置增光片、擴散片、…等光學膜片3;相對於出 光面的另一面則可以設置用來反射光線的反射片4。 本發明的特徵，在於所述導光板i每一點位置的厚度τ，係依 該入光面11與所述點位置的距離增加而呈正比例地減小；換言 之，所述入光面11的厚度為最大，從該入光面丨1往導光板的其 6 200949371 他任-位置所延伸距離愈大則厚度愈小。該厚度的改變，是形成 來設置反射片4的導光板！―側面’使該面呈具有多面向的 「歪面」（參第-A圖至第-E圖所示），而出光㈣則基本上保 持為平面。藉由此-結構，當光源2從入光面u投射光線進入導 光板1内時，光線得以由反射片4往出光面12方向反射出去，且 導光板距離光源愈遠處的亮度衰減可以藉由厚度縮小而增加反射 的光量糊糊t ’因使整_絲12的亮度卿度更為均 ❹ 勻。 本發明的絲’除何·人光面設於多邊料光板的 角端外，也可以如第三_示將人光面u設於多邊形導光板的其 中邊纟此只施例中，$ 了^吏單一光源的光線能擴散地投射進 入導光板内’所述人光面U最好_缺口_凹面形態。 前述實施例的導光板是普遍被使用的矩形，惟，本發明的結 ❹ 構亦適用於特殊產品所需要的三角形、跡、圓形、·等背光模 組之導光板。 第四圖與第五圖為顯示本發日騎絲組之導光板1為圓形的 實施例，由於圓形沒械角’因此，可以選擇任何—個邊緣的位 置形成直形平面（如第四圖所示）或缺口形凹面（如第五圖所示）的 光面同樣的’在此—實施例，圓形導光板1每—點位置的厚 度’係依該入光面11與所述點位置的距離增加而呈正比例地減小 (如第四A圖所示）。 以上所述者僅為用以解釋本發明之較佳實施例，並非企圖據 7 200949371 以對本發明作任何形式上之限制，是以，凡有在相同之發明精神 下所作有關本發明之任何修飾或變更，皆仍應包括在本發明意圖 保護之範#。 200949371 【圖式簡單說明】 第一為顯示本發明之背光模組的導光板為矩形，且入光面與光源 設於導光板一角端之實施例俯視示意圖。 第A圖為沿第一圖之A_A方向的平面剖視圖。 第B圖為沿第一圖之B_B方向的平面剖視圖。 第c圖為沿第一圖之c_c方向的平面剖視圖。 第D圖為沿第一圖之d_j)方向的平面剖視圖。 © S 為沿第—圖之E_E方向的平面剖視圖。 第二圖為顯示本發明導光板之人光面為缺口之凹面形態之實施例 示意圖。 第三圖為本發明之背光模組的導光板為矩形，且人光面與光源設 於導光板一邊之實施例俯視示意圖。 第四圖為顯示本發明之背絲_導光減_，且人光面為直 形平面之實施例俯視示意圖。 ❾第四A圖為沿第四圖之w方向的平面剖視圖。 第五圖為顯示本發明之背光模組的導光板為um光面為缺 口形凹面之實施例俯視示意圖。 【主要元件符號說明】 I ......導光板 II ......入光面 12......出光面 200949371 τ……厚度 2......光源 3……光學膜片 4……反射片200949371 VI. Description of the Invention: [Technical Field] The present invention relates to a 'fourth optical module' that is turned over to a illuminable product. [Prior Art] The application of the blame module is very common. The electronic devices that do not emit light, such as notebook computers, monitors, mobile phones, LCD TVs, etc., require a backlight module to provide a light source. Ο The general backlight module includes a light guide plate and a system. For an electronic product with a thin body thickness, 'the LED is usually used as a light source, and the light source is disposed on the light incident side of the side of the light plate. The first side of the light plate is provided with a reflection sheet, and the opposite second side is used as a light-emitting surface and a plurality of optical films composed of a diffusion sheet and a brightness enhancement sheet are disposed. The light emitted by the light source is projected into the light guide plate by the light incident surface, and part of the light is reflected by the reflection sheet, and then sequentially emitted from the light exit surface through the diffusion sheet and the brightness enhancement sheet. A light guide plate having a small area usually has a light incident surface formed on one side thereof and a light source is installed, and based on the light directing property of the light emitted by the LED, a plurality of light sources are generally disposed on the light incident surface of the light guide plate. So that the light sources will illuminate the light guide plate to make the light-emitting surface of the light guide plate exhibit a relatively uniform brightness. However, the more light sources, the higher the cost of materials, and the more manpower and man-hours spent on repairs and replacements. In addition, for a slightly larger area of the light guide plate, if the light source is only installed at one end of the light guide plate, the light that is projected into the light guide plate will gradually decrease when it is transmitted to the other end, and the entire scale of the squash light plate will be reduced. Uneven condition • Ugly, for a backlight module in which a light source is provided only on one side of a rectangular light guide plate, the conventional scheme is to form a slope on the other side of the light guide plate with respect to the light-emitting surface, and even if the guide is formed as a In the shape, the change in thickness is gradually reduced from the end of the human face to the other end, in an attempt to maintain the brightness of the illuminating surface uniform. The Taiwan Patent No. 63_ Patent Case discloses that a single-point light source using high illumination, south performance and high luminance is combined with a light guide plate to reduce the number of light sources and to reduce the cost, but the disadvantage is that No matter from which angle the light is entered, it will be difficult to control because of the high efficiency of the light source. (IV) The light-emitting surface of the light module is the same. The main feature of the light guide plate using the single-point light source disclosed in the Taiwan Patent No. M321113 patent case is that the main feature is The light board is provided with a plurality of dot structures, and a single light source is directed from the side of the light guide plate to the light guide plate, and the effect thereof is substantially different from the conventional technology. — © Public Bay Bulletin No. 1264596, which adds a lens to the front of a direct-lit single light source, and turns the direct-single-light source conversion handle (4) to the back of the light, but the space used is still too large. Taiwan Patent Publication No. 316410, Μ29872 530596, etc., all provide a design in which a light source is disposed at a corner of a rectangular light guide plate; however, the light guide plates used therein are all the conventional uniform-thickness light guide plates or wedge guides. The light board, therefore, must be supplemented with several light sources to ensure the uniformity of the light surface. In addition, the requirements for single-point light source backlight modules include the following reasons: 200949371 Ming: m ‘light, 5 performance lighting _ continued to be illuminated. ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The light source is a single-light source with the same or different properties of the single-light source backlight 1 and . After the light is applied to the light guide plate, the light guide plate is arranged to be 5·iSiSf '' can be provided in the above-mentioned principle. The object of the present invention is to solve the problem of the conventional backlight module. When the light panel is provided with a single light source, or when the plurality of light guides are guided from the light guide plate, the light guide surface can not effectively obtain the problem of sufficient uniformity and brightness. The invention provides a material-light_# optical module, which mainly relies on setting a single light source at a position on the side of the light guide plate, and the thickness of each position of the light guide plate is increased according to the distance between the light-sending surface and the sense position. * Decreased proportionally. The technical means of the present invention provides a light guide plate and a light source, and a strip formed on the side of the light guide plate forms a human light surface, and the thickness of the light surface of the person is the largest, and the light entrance surface is guided by the light entrance surface. The smaller the degree of disproportionation of the wire-position ship extension, the more light and brightness can be exhibited on the light-emitting surface of the light guide plate by using only the single-wire to project light from the human light surface into the human light guide plate (10). As a matter of choice, the light guide plate of the present invention may be a polygon such as a square, a rectangle, an angle, a diamond, or the like, or may be a circle. 5 200949371 Alternatively, in the present invention, one corner end or one side of the polygonal light guide plate may be formed into the light incident surface, and the light source may be disposed on the light incident surface. Alternatively, in the present invention, the light incident surface may be formed at a position of the edge of the circular light guide plate, and the light source may be disposed on the light incident surface. The present invention is provided on the light incident surface of the polygonal or circular light guide plate, and may be a straight plane or a notched concave surface. [Embodiment] Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings, so that anyone skilled in the art can implement the present specification after studying the patent specification. The first and second figures show an embodiment in which the rectangular light guide plate 1 is combined with the light source 2 to form a backlight module, wherein a side surface of the light guide plate 1 is formed as a light exit surface 12 by a range of its peripheral contour, and A light incident surface 11 is formed at one corner end of the rectangular light guide plate 1. The light incident surface 11 may be a straight plane formed by chamfering the corner end of the light guide plate (as shown in the first figure). A concave surface in a notch form may be formed from the corner end (as shown in the second figure); the light source 2 is mounted on the light incident surface 11 to allow the light generated by the light source to be projected from the light incident surface 11 into the light guide plate. . The light-emitting surface 12 may be provided with an optical film 3 such as a light-increasing sheet, a diffusion sheet, or the like according to actual needs; and the reflection sheet 4 for reflecting light may be disposed on the other surface of the light-emitting surface. The present invention is characterized in that the thickness τ of each position of the light guide plate i decreases in proportion to the distance between the light incident surface 11 and the point position; in other words, the thickness of the light incident surface 11 For the largest, from the light entrance surface 丨1 to the light guide plate, its thickness is smaller as the distance extending from the position of the light guide plate is greater. This change in thickness is formed by the light guide plate on which the reflection sheet 4 is formed! The "side" makes the face a "face" with multiple faces (see Fig. A to Fig. E), while the light (4) is basically flat. With this structure, when the light source 2 projects light into the light guide plate 1 from the light incident surface u, the light is reflected by the reflection sheet 4 toward the light exit surface 12, and the brightness of the light guide plate farther away from the light source can be attenuated. The amount of light that is increased by the reduction in thickness is reduced, because the brightness of the whole filament 12 is more uniform. The wire of the present invention can be disposed on the corner end of the polygonal light guide plate as shown in the third embodiment, and the human light surface u can be disposed on the side of the polygonal light guide plate. ^ 光线 A single source of light can diffusely project into the light guide plate. The human light surface U is preferably _ notched - concave. The light guide plate of the foregoing embodiment is a commonly used rectangle, but the structure of the present invention is also applicable to a light guide plate of a backlight module such as a triangle, a track, a circle, or the like which is required for a special product. The fourth and fifth figures show an embodiment in which the light guide plate 1 of the riding group of the present day is circular. Since the circular shape is not the same, it is possible to select any position of the edge to form a straight plane (such as The same as the light surface of the notched concave surface (as shown in the fifth figure) is the same 'in this embodiment, the thickness of the circular light guide plate 1 per point position is based on the light incident surface 11 and The distance of the stated position increases and decreases proportionally (as shown in Figure 4A). The above description is only for the purpose of explaining the preferred embodiments of the present invention, and is not intended to limit the invention in any way, so that any modifications relating to the present invention are made in the spirit of the same invention. Or the changes should still be included in the intent of the invention. 200949371 [Simplified Schematic Description] The first is a schematic plan view showing an embodiment in which the light guide plate of the backlight module of the present invention is rectangular, and the light incident surface and the light source are disposed at one corner end of the light guide plate. Figure A is a plan sectional view taken along the A_A direction of the first figure. Figure B is a plan cross-sectional view taken along line B_B of the first figure. Figure c is a plan sectional view taken along the c-c direction of the first figure. Figure D is a plan cross-sectional view along the d_j) direction of the first figure. © S is a plan sectional view along the E_E direction of the figure. The second figure is a schematic view showing an embodiment of a concave shape in which the human light surface of the light guide plate of the present invention is notched. The third figure is a schematic top view of an embodiment in which the light guide plate of the backlight module of the present invention is rectangular, and the human light surface and the light source are disposed on one side of the light guide plate. The fourth figure is a top plan view showing an embodiment in which the back wire _ light guide minus _ of the present invention and the human light surface is a straight plane. ❾ Figure 4A is a plan cross-sectional view along the w direction of the fourth figure. The fifth figure is a schematic top view showing an embodiment in which the light guide plate of the backlight module of the present invention has a um-surface as a concave concave surface. [Description of main component symbols] I ...... Light guide plate II... Light-incident surface 12... Light-emitting surface 200949371 τ... Thickness 2... Light source 3... Optical film 4...reflector