594074 五、發明說明（1) 發明所屬之技術領域 本發明關於一種側照光型導光板 佈有特殊設計具有微杀级的尺+知 ^ 種在…·刀 密度分布呈椒物線型關係、，以有效 丰地侍到均勻之面光源。 【先前技術】 由於液曰曰頌示器LCD為非發光性的裝置，需要Μ由背 夕細杜苴 〜的力月b。为光模組泛指可提供面光源 苴中，言j上可視為光源、導光板和光學膜三大部分。 =、曾 / ¥ 光板（Llght Guide panel or LGP)的功能在於 古V光線的散射方向，用來提高面板的輝度，並確保面板 =^的均勻性。背光模組已經廣泛使用在液晶顯示器的背 光照明（back - 1 i ght)等用途。 f用的月光板光源技術主要有側光式和直下式。近年 =f j型2、輕量化及低耗電化的潮流下，突顯出側光式 ^ " ’ 小型尺寸面板多採用側光式導光板設計。 a i ^光式導光板的光學設計是將側面入射的光源有效率 射霧化成均句的面光源，A就是引導光線的同 ;从二t α光線強度之損失’並且利用導光板底部的擴散 五、發明說明（2) 進一步祝明，以常用之導光板材料pMM^質為例，苴 I折射率鵾1 · 55，燈管發出之光線經過空氣進入背光，、 |滅面（即端面照光、edge light)，進入導光板的光利之入 反射原理彺另一端傳導，也就是光線在導光板内自然ς I過程中，射出的光線不會散逸損失而全部反射回導光、讯 (以go 〇入射之光線為例，從空氣傳輸到折射率瞒丨^ 介貝’其臣品界角a c大約為4 0 Ο，α大約為5 〇 〇，所以入射离 询大於反射角’光線將以全反射現象在導光板中傳輪、 而全反射過程中的光線如果碰到導光板底面的散射:，’豆 I反射光會往各個角度擴散，破壞全反射條件而使 ς 光板正面射出。 深自¥ I 因此，傳輸至導光板中的光線會因導光板的散射％ μ f十之改變光源聚集狀況。側光式導光板 =二 卜，早先由曰本實開昭63_2 4 5 2 9號公報 = = 振背面’印刷乳白色之散射‘點，當傳輸至 ； |遇到散射點，便射出導光板出光面。 光成中的光線 =㈣點並不能滿足面光源之出 求，因此，人們閱仏 々g勻度要 l(Pa忖ern)。此研究符合光學要求之散射圖樣 I據出光量隨著遠離;j/慮』射之'光源均句度，於是根 I疏到密，此散射圖2 f處异起’散射®樣之間距或面積由 樣由疏到密之密度分布設計可以增加光 Η 第6頁 594074 五、發明說明（3) 的均勻度。 另一方面，在導光板製作技術上也不斷有k破，例如 製程上較為簡潔且精密度較高的射出成形技術。射出成形 技術具有避免印刷油墨物質吸收光線的好處，以射出成形 技術為基礎，可以將射出成形的導光板蝕刻出散射圖樣， 也可以將散射圖樣設計製作在模仁上，射出成形後即得該 散射圖樣之導光板。例如中華民國專利公告4 5 2 〇 8 8號「具 細微鏡面結構之光學元件」專利案所揭示，以凹凸（突出： 散射圖樣之鏡面設計，增加光線導出效率。 、再舉例g之，利用切削（S丨〇 t cu t )技術製造出一條條 長溝型結構，可以經由長溝型間的寬度和深度的變化調制 出光面的光學分布。再舉例言之，在導光板上、下兩面均 做稜鏡片的加工，底面的稜鏡間距由疏到密，頂角的設計 則讓光向上反射，因此光能均勻地自導光板表面射出，且 具有適當程度的方向性，提高正面亮度。 广，年來隨著導光板技術的進步，導光板有著模組構造 簡=^低成本的趨勢，即所謂—體化導光板的設計，其方 將導光板的正面加工，使其具有稜鏡片的功能； 斤Η田θ特々殊的成型技術（例如V-Cut)，使得擴散臈及稜 ίϋΓ t一片；（3)在導光板射出成型時，在丙稀 ；' σ入少置不同折射率的顆粒狀材質（如MMA)，此種 594074 五、發明說明（4) ----- 導光板是靠光與顆粒間的散射作用，讓光自導 出。 θ 一體化導光板的設於，其中有許多都陷入 問題’例如在製作導光板時同時將擴散層一體 =力:工程序，但在導光板上直接製作擴散點會 &二再例如在導光板中添加的材質雖然可以：¾ ^ ’但疋或多或少都會吸收光線產生使用效率 _關於印刷或突出之散射圖樣密度分布，即自 了起由疏L $密之設計，可以由中華民國專利公告 鐾Ϊ均勻背光之輸入鍵盤」、493 1 48號「液晶顯 Υ板以及‘光板之製造方法」和4 9 3 0 8 7號「導 、>型面光源裝置及液晶顯示裝置」等專利案所揭 .f此同時，已經有人注意到導光板之散射圖 ^，單純地由疏到密，已不能滿足均勻度之要求 其f民國專利公告4 9 3 〇 5 5號「背光源角落暗區消 ς ^光板」專利案所揭示，以冷陰極管為光源之 靠近光源之端面角落暗區以較密之散射圖樣處 〕板表面射 難的取*捨 :型可以減 少出光的 加散射的 的降低。 從光源處 5 1 6 6 7 1號 _丨 示裝置及 光板.側 示0 樣分佈， 。例如由 除方法及 導光板， 理以增加594074 V. Description of the invention (1) The technical field to which the invention belongs The present invention relates to a side-illumination type light guide plate cloth with a special design and a micro-scale ruler + known ^ The type of knife density distribution has a pepper-line relationship, Effectively serve even surface light. [Prior art] Since the liquid crystal display LCD is a non-luminous device, it requires a force of b from the battery. For the light module, it refers to the area light source that can be provided. In the above description, it can be regarded as the light source, light guide plate and optical film. = 、 Zeng / ¥ The function of the Llght Guide panel or LGP lies in the scattering direction of the ancient V light, which is used to improve the brightness of the panel and ensure the uniformity of the panel. Backlight modules have been widely used in back-lighting of LCD monitors (back-1 i ght). The moonlight panel light source technology used in f mainly includes side-light type and direct-type. In recent years, under the trend of f j-type 2, light weight and low power consumption, the edge-lit type has been highlighted ^ " ’Small-size panels are mostly designed with edge-lit light guides. The optical design of the ai ^ light guide plate is to efficiently atomize the light source incident on the side into a uniform surface light source, where A is the same as the guiding light; from the loss of the light intensity of two t α 'and using the diffusion at the bottom of the light guide plate, 2. Description of the invention (2) Further wishing to take the example of the commonly used light guide plate material pMM ^ quality, 苴 I refractive index 鵾 1 · 55, the light emitted from the lamp enters the backlight through the air, and | edge light), the principle of light and light that enters the light guide plate, and the other end conducts, that is, during the natural process of light in the light guide plate, the emitted light will not be lost and will be reflected back to the light guide and the signal (with go 〇). For example, the incident light is transmitted from the air to the refractive index. ^ 介 Beijing 'its angle of boundary ac is about 4 0 〇, α is about 5 OO, so the incident light is greater than the reflection angle, and the light will be totally reflected. Phenomenon passes through the light guide plate, and if the light in the process of total reflection meets the scattering of the bottom surface of the light guide plate: "Bean I reflected light will diffuse to all angles, destroying the total reflection conditions and make the front of the light plate. Deep from ¥ I therefore The light transmitted to the light guide plate will change the light source concentration due to the light guide plate's scattering% μ f. Side light type light guide plate = Erbu, previously published by Shiben 63_2 4 5 2 9 = = Back of the vibrator When the "printing milky white scattering" point is transmitted to; | When the scattering point is encountered, it will be emitted from the light guide plate. The light in the light = the point does not meet the requirements of the surface light source, so people read The degree should be l (Pa 忖 ern). This study meets the optical requirements of the scattering pattern I according to the amount of light as the distance away; Distinctive Scattering® The design of the distance or area between samples from sparse to dense density design can increase light Η Page 6 594074 5. Description of the invention (3) uniformity. On the other hand, in the light guide plate manufacturing technology also There are constant breaks, such as injection molding technology that is simpler and more precise in the manufacturing process. Injection molding technology has the advantage of avoiding the absorption of light by printing ink substances. Based on the injection molding technology, the light guide plate can be etched and scattered by injection molding. Pattern, also available The scattering pattern is designed and manufactured on the mold core, and the light guide plate of the scattering pattern is obtained after injection molding. For example, as disclosed in the patent case of the Republic of China Patent Publication No. 4 522 08 "optical element with a fine mirror structure", (Prominent: The specular design of the scattering pattern increases the efficiency of light extraction. For another example, using the cutting (S 丨 〇 t cut) technology to produce a long groove structure, you can change the width and depth between the long grooves Modulate the optical distribution of the light surface. For another example, the cymbals are processed on the top and bottom of the light guide plate, and the pitch of the bottom surface is sparse to dense. The design of the top angle allows the light to reflect upward, so the light energy is uniform. The ground is emitted from the surface of the light guide plate, and has a proper degree of directivity to improve the front brightness. With the advancement of light guide plate technology over the years, the light guide plate has a trend of simple module structure = ^ low cost, which is the so-called -body light guide plate design, which will process the front side of the light guide plate so that it has a cymbal. Function; Special molding technology (such as V-Cut), which makes diffusion and ridges one slice; (3) When the light guide plate is injection-molded, it is thin; Granular material (such as MMA), this kind of 594074 V. Description of the invention (4) ----- The light guide plate relies on the scattering between light and particles to let the light out. The θ integrated light guide plate is set in, many of them are in trouble. 'For example, when the light guide plate is manufactured, the diffusion layer is integrated at the same time = force: process, but directly making the diffusion point on the light guide plate will be & Although the material added to the light board can: ¾ ^ 'But 疋 will more or less absorb light to produce efficiency _ About the density distribution of printed or prominent scattering patterns, that is, from the beginning to the design of the L $ 密 之Patent Bulletin: Input Keyboard with Uniform Backlight ", No. 493 1 48" Liquid Crystal Display Panel and "Manufacturing Method of Light Panel" and No. 4 9 3 0 8 7 "Guide, > Surface Light Source Device and Liquid Crystal Display Device", etc. At the same time, it has been noticed that the scattering pattern of the light guide plate ^ has simply been changed from sparse to dense, and can no longer meet the requirements of uniformity. It is published in the Republic of China Patent Publication No. 4 9 3 05 5 The "dark area elimination light plate" patent case revealed that the cold cathode tube is used as the light source and the dark corner of the end face near the light source is in a dense scattering pattern.) The surface of the board is difficult to shoot. Of reduce. From the light source, 5 1 6 6 7 No. 1 _ 丨 shows the device and light plate. The side shows 0-like distribution,. For example, by dividing methods and light guide plates,
再以背光模組實例說明。參見圖一所示，產 側光式月光模組其基本結構，是由貼在模組底 于膜103、光源101(LED或冷陰極管一CCFL)、、導光 生面光源 部及側反 板102 594074 五、發明說明（5) ^ ^GP)、擴散膜（Diffuser) 1〇4和稜鏡片i〇5 (或稱光 增光片）等零組件所組成。其中’導光板1〇2的散 Ϊ = 使得導光板具有.導引光散射方向、提高 面板的輝度和確保面板亮度的均句性等功能。 t 習知技術之散射圖樣1 〇 6有_ er7 A A、丄田 丨浪紋路、溝槽、鏡面結構和不對=盖色/墨？凸、波 射之面光源能約更均勻’於是Jf j二j外’考慮出 |減的現象，調整散射圖樣之尺寸八二里隨著遠離光源而遞 2 01變大20 2 (見圖二）。 刀，從光源處算起由小 然而散射圖樣單純的由小變大 |足面光源光均勻度之要求。例如以^由疏到密’並不能滿 I源，CCFL末端2 0 3 (接近電極部分陰f管（CCFL)作為光 需以較密之散射圖樣2 0 5處理以增加成光板的暗區2 0 4 |驗法則得知，導光板垂直光源方向兩，光句勾度。又由經 側邊緣濃度3 0 1可以增加出光均勻诤\側邊緣較暗，調整兩 I 度（見圖三）。 【發明内容】 1 ·欲解決之技術問題： 本發明提出導光板受端面反射位 分布不是單純線性遞減關係，而是呈& ^ ’其光量密度 有鑑於習知導光板圖樣設計皆；分布。 無一定的基礎為依據來設計，本蝥明 ％法則測試而得， 月人經多方研究，致力Take the backlight module as an example. As shown in Figure 1, the basic structure of a side-lighting moonlight module is composed of a film 103 attached to the bottom of the module, a light source 101 (LED or cold cathode tube-CCFL), a light-guiding surface light source section, and a side reflector. 102 594074 V. Description of the invention (5) ^ GP), diffuser film (Diffuser) 104, and diaphragm i05 (or light enhancement film) and other components. Among them, the scattering of the light guide plate 102 is to make the light guide plate have the functions of guiding the direction of light scattering, improving the brightness of the panel, and ensuring the uniformity of the brightness of the panel. t Scattering pattern of the conventional technology 1 〇 6 _ er7 A A, Putian 丨 wave pattern, groove, mirror structure and wrong = cover color / ink? Convex and radiating surface light sources can be more uniform 'so Jf j 二 j 外' takes into account the phenomenon of | reduction, adjusting the size of the scattering pattern as the distance from the light source increases 2 01 to 20 2 (see Figure 2) ). The knife is counted from the light source, but the scattering pattern is simply changed from small to large. For example, ^ from sparse to dense 'does not fill the I source. The end of the CCFL 2 0 3 (close to the electrode part of the cathode tube (CCFL) as light needs to be treated with a denser scattering pattern 2 0 5 to increase the dark area of the light plate 2 0 4 | The rule of thumb shows that the light guide plate is perpendicular to the direction of the light source and the degree of the light sentence. From the side edge concentration of 3 0 1 it can increase the light uniformity and the side edge is darker, adjust the two I degrees (see Figure 3). [Summary of the invention] 1. The technical problem to be solved: The present invention proposes that the distribution of the reflection position of the end surface of the light guide plate is not a purely linear decreasing relationship, but presents & ^ 'its light intensity density in view of the conventional light guide plate design; distribution. Designed on the basis of no certain foundation, which was obtained by testing the Benson's% rule.
第9頁Page 9
594074 594074 五、發明說明（7) 【圖號說明】 101 光 源 102 導 光 板 103 反 射 層 104 擴 散 層 105 稜 鏡 片 106 散 射 圖 樣 201 較 小 散 射 圖 樣 202 較 大 散 射 圖 樣 203 CCFL 末 端 204 光 源 造 成 導 光 板 角 落 之 暗 區 205 針 對 導 光 板 角 落 之 暗 區 之 較 大 散 射 圖樣 301 針 對 導 光 板 垂 直 光 源 方 向 邊 緣 暗 區 之較大散射圖樣 401 本 發 明 之 微 突 起 物 【實施方式】 本發明提供了一種創新的導光板結構，其具體地提出 微突起物之密度分布呈搬物線型關係，運用撤物線公式調 整散射圖樣濃度分佈，可以具體且有效率地反應導光板中 出光量的分布進而增加均勻度，以改善習知一體化導光板 結構之缺失，而得到一有效率的均勻面光源。 參見圖四，為本發明之散射圖樣及散射圖樣密度分佈594074 594074 V. Description of the invention (7) [Illustration of drawing number] 101 Light source 102 Light guide plate 103 Reflective layer 104 Diffusion layer 105 Cymbal 106 Scattering pattern 201 Smaller scattering pattern 202 Larger scattering pattern 203 CCFL end 204 Light source causes corner of light guide plate Dark area 205 Large scattering pattern for the dark area at the corner of the light guide plate 301 Large scattering pattern for the dark area at the edge of the light guide plate in the direction of the vertical light source 401 Microprojections of the present invention [Embodiment] The present invention provides an innovative guide The light plate structure specifically proposes that the density distribution of microprojections has a linear relationship. Using the withdrawal line formula to adjust the concentration distribution of the scattering pattern can specifically and efficiently reflect the distribution of light output in the light guide plate to increase uniformity. The lack of the conventional integrated light guide plate structure is improved, and an efficient uniform surface light source is obtained. See Figure 4 for the scattering pattern and scattering pattern density distribution of the present invention.
第11頁 594074 五、發明說明（8) 呈拋物線關係示意圖（本發明之另一型散射圖樣密分佈呈 拋物線關係示意圖可見圖五）。其中，散射圖樣是本發明 之微突起物4 0 1。 * 本發明之微突起物4 0 1之直徑或邊長範圍是數微米 (m i c r 〇 m e t e r )到數百微米，微突起物4 0 1之間距範圍是數 微米到數百微米，此微米級散射圖樣尺寸和間距之設計， 除了可以增加漫射之均勻度和具有光點掩飾的效果，還不 會提高散射圖樣之面積率造成出射光量強度先多後少的現 象。 重要地，微突起物4 0 1密度分布呈拋物線型關係，其 不規則微細結構之密度分布，除了可以有效反應導光板中 出光量的分布進而增加均勻度，還可以避免規則性分布所 造成之繞射現象（俗稱彩虹）。 本發明之微突起物4 0 1形狀是中空錐形體，其真實形 狀應視突起之底部為圓型、橢圓形、正方形、長方形、菱 形或不對稱形之設計而定。 本發明徼突起物之製作方式可以利用LIGA製程製作該 圖樣之模仁，再進行射出成形之。 進一步說明，即首先選定背光板材質和形狀，確定微Page 11 594074 V. Description of the invention (8) A schematic diagram showing a parabolic relationship (another dense scattering pattern of the present invention showing a parabolic relationship is shown in Figure 5). Among them, the scattering pattern is the microprojection 401 of the present invention. * The diameter or side length of the micro-projections 401 of the present invention is in the range of several micrometers (micrometers) to hundreds of microns, and the distance between the micro-projections 401 is in the range of several micrometers to hundreds of micrometers. This micron-level scattering The design of the pattern size and spacing, in addition to increasing the uniformity of the diffusion and the effect of concealing the light spots, will not increase the area ratio of the scattering pattern and cause the phenomenon of the intensity of the emitted light to increase. Importantly, the density distribution of microprojections 401 has a parabolic relationship. The density distribution of irregular microstructures can effectively reflect the distribution of the light output in the light guide plate and increase the uniformity. It can also avoid the regular distribution. Diffraction (commonly known as rainbow). The shape of the micro-protrusions 401 of the present invention is a hollow cone. The true shape of the micro-protrusions should depend on the design of the bottom of the protrusions as round, oval, square, rectangular, rhombic or asymmetric. In the manufacturing method of the stilt protrusion of the present invention, the mold core of the pattern can be manufactured by the LIGA process, and then injection molding can be performed. To further explain, first select the material and shape of the backlight board,
第12頁 594074 五、發明說明（9) _ 突起物之尺寸和深度，以拋 '2 + B(Y-Y〇) + C為基礎 1形之基本公式Y= Α(Υ-Υο) I抛物線公式之Υ〇分段J =生公式），利用調整 I最佳微突起物401之密度分布。值（A、B和C參數），尋求 以下將以實施例鲜细今。 I礎公式；而表- I第 —σ ，、中表一是第一實施例之基 I段點。 疋弟〜貫施例me參數數值和¥〇分 丨板，制Π二'，月光板之漠度分布84mm χ 6°随之導光 30“之中空金字塔型，其高度為 1先根據表、，一，選定访向之增量px為固定值 'm Y方向的增s py以拋物線公式γ= Α(γ —γ〇) a 2 + — 2告二〇為Λ式基礎，將表一 A、B、。和Y 0，代回表一之公式 死得到Coy值，再得到γ方向的增量py。計算後第一排前 |個突起物之起始點座標分別為（〇，〇 ) ( 〇，〇 ·丨8 ) ( 〇，〇 · 3 5 ) 0。，〇 · 5 3 ) ( 0，〇 · 7 1 )。該導光板輝度之均勻度量測值為 8战。密度分布如圖六所示。 Φ 表 1 P 2 Ρχ " 0. 04/Cox, Cox - 0. 32........................... ····公式 y = 〇· 03/Coy， Coy = Α(Υ-Υ〇)Λ2+Β(Υ—Yo)+C...... ••公式Page 12 594074 V. Description of the invention (9) _ The size and depth of the protrusions are based on the basic formula of the shape of '2 + B (YY〇) + C. Y = Α (Υ-Υο) I of the parabolic formula Υ〇 Segment J = Health formula), using the density distribution of the optimal microprojections 401 by adjusting I. The values (A, B, and C parameters) are sought below. I is the basic formula; and Table-I-σ, and Table 1 are the base I points of the first embodiment. The value of the me parameter and the value of ¥ 0 in the example, the plate, the system II, the moonlight plate's desert distribution is 84mm χ 6 °, and then the light is guided 30 "hollow pyramid type, its height is 1 according to the table, First, the increment px of the selected visit direction is a fixed value, and the increase in the Y direction, s py, is based on the parabolic formula γ = Α (γ —γ〇) a 2 + — 2 is based on the Λ formula. , B,. And Y 0, substitute the formula in Table 1 to get the Coy value, and then get the increment py in the γ direction. After calculation, the starting point coordinates of the first | first protrusions are (0, 0). (〇, 〇 · 丨 8) (〇, 〇 · 3 5) 0, 〇. 5 3) (0, 〇 · 7 1). The uniformity measurement of the light guide plate brightness is 8 wars. The density distribution is as follows As shown in Figure 6. Φ Table 1 P 2 Ρχ " 0. 04 / Cox, Cox-0. 32 ............. ···· Formula y = 〇 03 / Coy, Coy = Α (Υ-Υ〇) Λ2 + Β (Υ—Yo) + C ...... •• Formula
第13頁 594074 五、發明說明（ίο) I表二 。 YYoABC · · 0〜1100· 0 0 0 1 3 6-0· 0 0 78 6 0. 1 7 11〜50110· 000165-0. 002090. 1 50^6050-0.000250.01550 27 第二實施例是四吋背光板之濃度分布另一型 60·之導光板，製作底部為4〇以耿3〇# m之中办 型，其高度為5# in。同樣根據表一和表二，但广五予塔 數排均向右位移62/z in。計算後第—排前一五個一突向偶 始點座標分別為（0, 〇)(〇· 0 6 2, 〇· 18)(〇, 〇 35) 物之起 (0.062，0.53)(0，0.71)。該導光板輝度均勻产 8 6% 。微突起物部分分布圖如圖七所$ : _又Π達為 本貫施例之均勻度（uniformity)計算是根據 ^7.2 1 5- 1 9 9 2中對投影均勻度的定義，是從光輪出 |得到的九點量測值中，取出最大與最小的照度值，里^所 個數值與九點平均值的偏差以百分表示，即為节旦5兩 均勻度。 〃、〜仅影設的 另外，本發明導光板圖樣，亦可依據光源的增加而作 不同的變化，例如在較大的導光板面積需以兩側導入光源 時’可將圖樣依據兩個拋物線來設計，使得大型導光板亦 594074 五、發明說明（11) 能呈現均勻的輝度。 又例如在以^ LED為光源時，亦可依據光源設計出更多 個拋物線計算而得的微突起物分佈圖型。 綜上所陳，本發明所提供的導光板創新結構，係改善 了習知枝術之缺點，而使得導光板展現的輝度達到相當的 均句，是為完全符合發明專利要件之創新結構。當然，說 明書中所舉之實施例僅為本發明之實施狀態，但凡與本發 明相同精神之等效變化，皆屬本發明之範圍中。 «Page 13 594074 V. Description of the Invention (ίο) I Table II. YYoABC ·· 0 ~ 1100 · 0 0 0 1 3 6-0 · 0 0 78 6 0. 1 7 11 ~ 50110 · 000165-0. 002090. 1 50 ^ 6050-0.000250.01550 27 The second embodiment is four inches The concentration distribution of the backlight plate is another type of 60 · light guide plate. The bottom is made of 40mm and 30mm, and its height is 5 # in. According to Table 1 and Table 2, the rows of towers of Guangwuyu are all shifted to the right by 62 / z in. After calculation, the coordinates of the first five points of the first row to the even starting point are (0, 〇) (〇 · 06 2, 〇 · 18) (〇, 〇35) from the thing (0.062, 0.53) (0 , 0.71). The light guide plate evenly yields 8 6%. The distribution of the microprojections is shown in Figure 7. The uniformity calculation of the present embodiment is based on the definition of the projection uniformity in ^ 7.2 1 5- 1 9 9 2 and is derived from the light wheel. Out of the nine-point measurement values obtained by |, the maximum and minimum illuminance values are taken out, and the deviation between the number and the nine-point average value is expressed as a percentage, which is the uniformity of the joints. 〃 、 ~ In addition, only the design of the light guide plate of the present invention can be changed differently according to the increase of the light source. For example, when a large light guide plate area needs to introduce the light source on both sides, the pattern can be based on two parabolas. It is designed to make the large light guide plate 594074. 5. Description of the invention (11) can show uniform brightness. For another example, when ^ LED is used as the light source, it is also possible to design more microprojection distribution patterns calculated from the parabola according to the light source. In summary, the innovative structure of the light guide plate provided by the present invention improves the shortcomings of the conventional branching technique, and makes the brightness exhibited by the light guide plate reach a fair level. It is an innovative structure that fully meets the requirements of the invention patent. Of course, the embodiments mentioned in the description are only the implementation status of the present invention, and any equivalent changes in the same spirit as the present invention are within the scope of the present invention. «
第15頁 594074 圖式簡單說明 圖一、背光模組示意圖 圖二、習知導光板散射圖樣之密度分布 圖三、另一種習知導光板散射圖樣之密度分布^ 圖四、本發明之散射圖樣及散射圖樣密度分布呈拋物線關 係示意圖 圖五、本發明之另一型散射圖樣密度分布呈拋物線關係示 意圖 圖六、本發明之第一實施例之密度分布圖 圖七、本發明之第二實施例之微突起物部分分布圖Page 594074 Brief description of the diagram Figure 1. Schematic diagram of the backlight module. Figure 2. Density distribution of the scattering pattern of the conventional light guide plate. Figure 3. Density distribution of the scattering pattern of another conventional light guide plate. Figure 4. The scattering pattern of the present invention Schematic diagram showing the density distribution of the scattering pattern in a parabolic relationship. Figure 5. Schematic diagram showing the density distribution of another scattering pattern in the present invention in a parabolic relationship. Figure 6. Density distribution diagram of the first embodiment of the invention. Figure 7. Second embodiment of the invention Distribution of micro protrusions
第16頁Page 16