201116900 AU0901016 31953twf.doc/n 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種發光裝置’且特別是有關於一種 出光均勻度較佳的發光裝置。 【先前技術】 現今社會多媒體技術相當發達，其多半受惠於半導體 元件或顯示裝置的進步。就顯示器而言，具有高晝質、空 間利用效率佳、低消耗功率、無輻射等優越特性之液晶顯 示器（liquid crystal display)已逐漸成為市場之主流。由於液 晶顯不面板並不具有發光的功能，故在液晶顯示面板下方 必須配置一背光模組(backlight module)以提供一面光源， 以使液晶顯示面板能達到顯示的目的。 般來5兒，为光模紅可分為侧邊式背光模組與直下式 背光模組。另外，依照光源的種類又可以分為冷陰極螢光 燈管(cold cathode fluorescent! lamp，CCFL)光源背光模組 與發光二極體(light emitting diode，LED)光源背光模組。 直下式背光模組由於光線是直接進入使用者的眼睛，需要 較長的混光距離將光線混合均勻，使得背光模組的厚度變 厚。側邊式背光模組則是透過導光板將光線混合均勻後再 進入使用者眼睛，因此側邊式背光模組具有厚度較薄的優 勢。 近年來液晶顯示器逐漸朝向大尺寸的趨勢發展，直下 式月光模組可將整個液晶顯示面板切割成個區塊， 201116900 並且依據每一區塊的影像内容，而對每一區塊所對應的背 光源亮度進行調整（即區域點亮（local dimming )技術）， 以突顯晝面的對比度（contrast ratio )。因此，使用直下式 背光模組的液晶顯示器所呈現的對比度(Contrast Ratio， C R)大於使用側邊式背光模組的液晶顯示器所呈現的對比 度。 【發明内容】 本發明提供一種發光裝置，其具有較佳的出光均勻 度。 # 祕下表面至少其中之―，其中，位於每-凹陷結構下方 之光源所產生的光線於凹陷結構的側表面產生全反射並持 續於光學板内進行至少一次全反射直到遇到出光結構才射 出光學板。 本發明提出一種發光裝置包括多個光源、一光學板、 多個凹陷結構以及至少一出光結構，其中光學板設置於光 源的上方，其中光學板具有一上表面以及一下表面。凹陷 結構由光學板的上表面向光學板的内部延伸，每一凹陷結 構對應設置於一個光源的上方，其中每—凹陷結構的側表 面具有至少兩個傾斜角度。出光結構設置於光學板的上表 本發明提出—種發光裝置包括多個光源、-光學拓、201116900 AU0901016 31953twf.doc/n VI. Description of the Invention: [Technical Field] The present invention relates to a light-emitting device and particularly relates to a light-emitting device having better light uniformity. [Prior Art] Today's social multimedia technology is quite developed, and most of them benefit from advances in semiconductor components or display devices. In terms of displays, liquid crystal displays with superior properties such as high quality, good space utilization, low power consumption, and no radiation have gradually become the mainstream in the market. Since the liquid crystal display panel does not have the function of emitting light, a backlight module must be disposed under the liquid crystal display panel to provide a light source for the liquid crystal display panel to achieve the display purpose. In general, the light mode red can be divided into a side type backlight module and a direct type backlight module. In addition, according to the type of the light source, it can be further divided into a cold cathode fluorescent lamp (CCFL) light source backlight module and a light emitting diode (LED) light source backlight module. Since the direct-lit backlight module directly enters the user's eyes, a long mixing distance is required to uniformly mix the light, so that the thickness of the backlight module is thickened. The side-lit backlight module mixes the light through the light guide plate and then enters the user's eyes. Therefore, the side-lit backlight module has the advantage of thinner thickness. In recent years, liquid crystal displays have gradually developed toward large-size trends. The direct-lit moonlight module can cut the entire liquid crystal display panel into a block, 201116900 and according to the image content of each block, the backlight corresponding to each block. The source brightness is adjusted (ie, local dimming technique) to highlight the contrast ratio of the facet. Therefore, the contrast ratio (C R ) exhibited by the liquid crystal display using the direct-lit backlight module is greater than that exhibited by the liquid crystal display using the side-lit backlight module. SUMMARY OF THE INVENTION The present invention provides a light-emitting device having better light-emitting uniformity. #密下下表面在至少中, wherein the light generated by the light source located under each recessed structure produces total reflection on the side surface of the recessed structure and continues to be at least one total reflection in the optical plate until the light-emitting structure is encountered. Optical plate. The invention provides a light-emitting device comprising a plurality of light sources, an optical plate, a plurality of recessed structures and at least one light-emitting structure, wherein the optical plate is disposed above the light source, wherein the optical plate has an upper surface and a lower surface. The recessed structure extends from the upper surface of the optical plate toward the inside of the optical plate, and each recessed structure is correspondingly disposed above a light source, wherein each side surface of the recessed structure has at least two oblique angles. The light-emitting structure is disposed on the upper surface of the optical plate. The present invention provides a light-emitting device comprising a plurality of light sources, an optical extension,
由光學板的上表面向光學板的内部延伸， 卜表面。凹陷結構 ’每一凹陷結構對 201116900 AU0901016 31953tw£doc/n 方:其中每，結構的側表面具 一段浐面不二〃第-段表面’且第-段表面與第 一專又表面不位於同一平面上或不位於同— 構設置於光學板的上表面與下表面至少其甲之—，° 了 位於每陷結構下方之光源所產生的光 側表面產生全反射並_於光學板⑽行至少 直到遇到出光結構才射出光學板。 王射 本發明提出-種發光裳置包括多個光源、 2凹及至少一出光結構。光學板設置於光源的 /、中光予板具有-上表面以及—下表面。凹陷社構 的上表面向光學板的内部延伸，每—凹陷結構對 ^又，於一個光源的上方’其中每一凹陷結構的側表面具 有一弟一段表面與-第二段表面，且第—段表面一陷社 構之軸心線具有m第二段表面與㈣結構之車: 心線具有-第二夹角。出光結構設置於光學板的上表面與 下表面至少其中之一’其中’位於每—凹陷結構下方之光 源所產生的光線於凹陷輯義表面赴全反射並持續於 光學板内進行至少-次全反射直到遇到出光結構才射出光 學板。 基於上述，本發明的光學板内的凹陷結構可使光源發 出的光線在光學板内進行至少一次的全反射，直到遇到出 光結構才射出光學板。由於光源的光線是經過至少一次的 全反射或是多次全反射之後才射出光學板，因此自光學板 射出的光線可呈現出均勻的面光源。 201116900 AU0901016 31953twf.doc/n 為讓本發明之上述特徵和優點能更明顯易懂，下文特 舉實施例，並配合所附圖式作詳細說明如下。 【實施方式】 在以下的多個實施例中，發光裝置係具有多個光源， 然而’為簡化說明，故僅在圖U會示多個光源，而在圖* 至圖11中歸示-個光源作為代表，但並_錄定本發 明。 圖1繪示本發明一實施例之發光裝置的剖面圖。圖2A 繪示圖1之發光裝置的凹陷結構的放大圖。圖2B繪示圖 2A之凹陷結構的一種變化結構。圖3A繪示圖1之發光^ 置的凹陷結構的示意圖。圖3B繪示圖3A之凹陷結構的一 種變化結構。 '° °月同13^·參照圖1與圖2A，本實施例之發光裝置1 〇〇 ，括多個光源110、一光學板120、多個凹陷結構13〇以及 夕個出光結構140。光源11〇例如為發光二極體，且光學 板120設置於光源11〇的上方。在本實施例中，光源 可與光學板120直接貼合或者是與光學板12〇之間隔有一 間距以作為散熱空間。光學板120内可選擇性地分佈有多 個擴散粒子（未繪示），以提升發光裝置1〇〇的出光均勻度。 光學板120具有一上表面122以及一下表面124。凹 陷結構130位於光學板120内，且每一凹陷結構13〇對應 設置於一個光源110的上方。值得注意的是，當光源11〇 〇上發出的光線L照射到凹陷結構130時會產生全反射而 201116900 AU0901016 31953twf.doc/n 轉為往光學板120的側邊傳遞。如此„來，四陷結構i3〇 可使光線L轉向凹陷結構13G的四周發散，而不會聚集在 光源1=的正上方，進而可提升發光襞置1〇〇的出光均勻 度。換言之，藉由光學板12〇及凹陷結構13㈣設計以使 光源110 #光線往四周發散，便可進—步縮小光源u 需的混光距離。 承上所述，每一凹陷結構13〇的側表面132具有至少 兩個傾斜角度，且凹陷結構13〇可為錐形凹槽（如圖3A 所不）或是V形凹槽（如圖3B所示）。詳細而言，請參照 圖2A ’母凹陷結構130的側表面132具有一第一段表面 132a與一第二段表面132b，且第一段表面132&與第二段 表面132b不位於同一平面上或不位於同一曲面上。 換言之，第一段表面132a與凹陷結構13〇之軸心線G 具有1(又可稱為第—傾斜驗），第二段表面 132b與凹陷結構13〇之轴心線G具有—第二夾角0 2(又可 第二傾斜角度）。在本實施例中，在凹陷結構13〇中， 越罪近凹陷結構130之底部B的側表面132的傾斜角度越 小。換言之，較靠近凹陷結構13〇之底部B的第一段表面 B2a的第一夾角0 1小於較遠離凹陷結構130之底部B的 第一段表面132b的第二夾角Θ2。 在本a施例中，第二失角0 2的角度範圍例如為30。 之間，且第一夾角0 !小於第二夾角。此外，當 光學板120的厚度為τ，且光源11〇 (例如發光二極體晶 片）的寬度為W時，T與W符合下式： 201116900 AU0901016 31953twf.doc/n T = B χ W χ [Tan( θ 1 )+Tan( Θ 2)] 其中，B介於0.25〜0.5之間。 表1列出在不同轉折高度D、第一夾角6»1與第二夾 角02時，光學板120内的凹陷結構130的漏光率，此漏 光率之調配可控制凹陷結構130正上方的光源強度以搭配 發光裝置100對於光源均勻度之需求，其中當光源110之 間的間距越小，則所需之漏光率越大。 表1 .D(公釐） 4.8 01 (° ) 22.5 22.5 22.5 02 (° ) 30 32.5 35 漏光率 2.85% 2.12% 6.37% D (公釐） 5 6»1 (。） 22.5 22.5 22.5 02 (° ) 30 32.5 35 漏光率 3.94% 2.12% 5.09% D (公釐） 5.2 Θ1 (。） 22.5 22.5 22.5 Θ2 (° ) 30 32.5 35 漏光率 5.28% 2.88% 4.06% 201116900 AU0901016 31953twf.doc/n 請參照表1，由表I可知可藉由調整第一夾角0丨與 第二夾角Θ2的角度大小來調整漏光率。 在其他實施例中’如圖2B所示，凹陷結構的例 表面132可具有—第一段表面132a、—第二段表面⑽ 與一第三段表面132c，且第一段表面132a與凹陷結構13〇 之軸心線G具有一第一夾角Θ1，第二段表面132b與軸心 線G具有-第二失角Θ2’第三段表面132e與軸心線〇具 有-第三夾角Θ3。第二夾角们小於第三炎角们且大於 第一夾角<9 1。 表2列出在不同轉折高度D卜D2以及第一夾角、 第二夾角Θ2與第三夾角Θ3時，光學板12〇内的凹陷結 130的漏光率。 表2 Θ1Γ ) 20 ---*Ί 20 Θ2 (° ) 22.5 ------- 〜丨丨〜 25 (93 (° ) 32.5 ---— 32.5 D1 (公釐） 4 ~—, 3.5 D2 (公釐） 5 ------、-- 5 漏光率 2.88% 1.68% 由表2可知，可藉由調整第一夾角01、第二爽角μ 與弟二夾角03的角度大小來調整漏光率。 在本貫施例中，出光結構14〇設置於光學板的下 表面124上，且出光結構Η0例如為一圖案化反射層，圖 201116900 AU0901016 31953twf.doc/n 案化反射層可以網點的方式配置或是以其他具有光學均勻 化的效果的方式配置，且圖案化反射層的材質可為油墨等 南反射性材料。位於凹陷結構13〇下方之光源11〇所產生 的光線L可於凹陷結構130的側表面132產生全反射並持 續於光學板120内進行至少—次全反射直到遇到出光結構 140才射出光學板120。換言之，當光線L在光學板12〇 内進行全反射的過程中，當遇到出光結構14〇時，全反射 φ 作用便會被破壞，如此便可使得光線L·射出光學板12〇而 出光。在本實施例中，光線L可在光學板12〇内進行一或 多次全反射直到遇到出光結構140才射出光學板12〇，此 曰^，出光結構140可分散光線l的出光位置，而有助於提 升發光裝置100的出光均勻度。詳細而言，在遇到出光結 構140之前，光源11〇所產生的光線[於光學板12〇内的 入射角（或反射角）會保持在一全反射角<9 F，而在遇到出 光結構140之後’光線L於光學板120内的反射角（或入 射角）會改變進而破壞全反射作用並使光線從光學板12〇 鲁 的上表面丨22出光。此外，在之後的圖4〜圖9的實施例 中，光線於光學板120中的反射路徑相似於圖丨中鈞光線 L於光學板120中的反射路徑。 、- 在本實施例中，光源110可配置於一基板15〇上。詳 細而言，基板150可為電路板，而在基板15〇上具有多個 凹槽152，每一凹槽152可對應位於一凹陷結構13〇的下 方，且光源110可配置於凹槽152中並與基板15〇電性連 接。另外’為提南光源no的光線利用率，可在凹择m 201116900 AU0901016 31953twf.doc/n 的内壁152a上形成一反射層（未繪示），以反射照射到内 壁152a的光線。此外’可在凹槽152申填入一透光膠體 160，以覆蓋並保護光源11〇。The surface of the optical plate extends from the upper surface of the optical plate to the surface. The recessed structure 'each recessed structure pair 201116900 AU0901016 31953tw£doc/n side: each of the side surfaces of the structure has a section of the surface of the first section and the first section surface is not in the same plane as the first surface In the plane or not in the same configuration, the upper surface and the lower surface of the optical plate are at least a--, and the light-side surface generated by the light source located under each recessed structure generates total reflection and is at least in the optical plate (10) The optical plate is not emitted until the light-emitting structure is encountered. The invention proposes that the illuminating skirt comprises a plurality of light sources, two concaves and at least one light-emitting structure. The optical plate is disposed on the / of the light source, and the intermediate light plate has an upper surface and a lower surface. The upper surface of the recessed structure extends toward the inside of the optical plate, and each of the recessed structures is opposite to a light source. The side surface of each of the recessed structures has a surface and a second surface, and the first The axis of the segment surface has a second segment surface and a (four) structure car: the heart line has a second angle. The light-emitting structure is disposed on at least one of the upper surface and the lower surface of the optical plate, wherein the light generated by the light source located under each of the concave structures is totally reflected on the concave surface and continues to be at least one time in the optical plate. The reflection is not emitted until the light-emitting structure is exposed. Based on the above, the recessed structure in the optical plate of the present invention allows the light emitted from the light source to be totally reflected at least once in the optical plate until the light-emitting structure is exposed to exit the optical plate. Since the light of the light source is emitted through the optical plate after at least one total reflection or multiple total reflections, the light emitted from the optical plate can exhibit a uniform surface light source. The above-described features and advantages of the present invention will become more apparent from the following description. [Embodiment] In the following embodiments, the light-emitting device has a plurality of light sources. However, for simplicity of explanation, only a plurality of light sources are shown in FIG. U, and are shown in FIG. The light source is representative, but the invention is also recorded. 1 is a cross-sectional view showing a light emitting device according to an embodiment of the present invention. 2A is an enlarged view showing a recess structure of the light-emitting device of FIG. 1. Fig. 2B illustrates a variation of the recessed structure of Fig. 2A. FIG. 3A is a schematic view showing a recessed structure of the light emitting device of FIG. 1. FIG. Fig. 3B illustrates a variation of the recessed structure of Fig. 3A. Referring to Fig. 1 and Fig. 2A, the light-emitting device 1 of the present embodiment includes a plurality of light sources 110, an optical plate 120, a plurality of recessed structures 13A, and an evening light-emitting structure 140. The light source 11 is, for example, a light emitting diode, and the optical plate 120 is disposed above the light source 11A. In this embodiment, the light source may be directly attached to the optical plate 120 or spaced apart from the optical plate 12 to serve as a heat dissipation space. A plurality of diffusion particles (not shown) are selectively distributed in the optical plate 120 to improve the uniformity of light emission of the light-emitting device 1 . The optical plate 120 has an upper surface 122 and a lower surface 124. The recessed structure 130 is located in the optical plate 120, and each recessed structure 13 is disposed correspondingly above one of the light sources 110. It should be noted that when the light L emitted from the light source 11〇 illuminates the recess structure 130, total reflection is generated and 201116900 AU0901016 31953twf.doc/n is transferred to the side of the optical plate 120. In this way, the four-sink structure i3〇 can diverge the light L around the recessed structure 13G without being concentrated directly above the light source 1=, thereby improving the uniformity of light emission of the light-emitting device 1〇〇. In other words, borrowing Designed by the optical plate 12 and the recessed structure 13 (4) so that the light source 110 # is diverged around, the light mixing distance required by the light source u can be further reduced. As described above, the side surface 132 of each recessed structure 13 has At least two inclination angles, and the recessed structure 13〇 may be a tapered groove (not shown in FIG. 3A) or a V-shaped groove (as shown in FIG. 3B). In detail, please refer to FIG. 2A 'mother recessed structure The side surface 132 of the 130 has a first segment surface 132a and a second segment surface 132b, and the first segment surface 132& and the second segment surface 132b are not in the same plane or on the same curved surface. In other words, the first segment The surface 132a and the axis line G of the recessed structure 13 have a 1 (also referred to as a first tilt test), and the second segment surface 132b and the axis line G of the recessed structure 13 have a second angle 0 2 (again Second tilt angle). In the present embodiment, in the recess structure 13 In the middle, the inclination angle of the side surface 132 of the bottom B of the sin-closed recess structure 130 is smaller. In other words, the first angle 0 1 of the first-stage surface B2a closer to the bottom B of the recessed structure 13 is smaller than the far-reaching structure. The second angle Θ2 of the first segment surface 132b of the bottom B of the 130. In the present embodiment, the angle of the second lost angle 0 2 is, for example, 30, and the first angle 0! is smaller than the second angle. Further, when the thickness of the optical plate 120 is τ, and the width of the light source 11 (for example, the light-emitting diode wafer) is W, T and W are in accordance with the following formula: 201116900 AU0901016 31953twf.doc/n T = B χ W χ [ Tan( θ 1 )+Tan( Θ 2)] where B is between 0.25 and 0.5. Table 1 lists the optical plate 120 at different corner heights D, the first angle 6»1 and the second angle 02. The light leakage rate of the recessed structure 130, the blending of the light leakage rate can control the intensity of the light source directly above the recessed structure 130 to match the requirement of the light source device 100 for the uniformity of the light source, wherein the smaller the spacing between the light sources 110 is, the required The greater the light leakage rate. Table 1.D (mm) 4.8 01 (°) 22.5 22.5 22.5 02 (°) 30 32.5 35 Light leakage rate 2.85% 2.12% 6.37% D (mm) 5 6»1 (.) 22.5 22.5 22.5 02 (°) 30 32.5 35 Light leakage rate 3.94% 2.12% 5.09% D (mm) 5.2 Θ1 (.) 22.5 22.5 22.5 Θ2 (° ) 30 32.5 35 Light leakage rate 5.28% 2.88% 4.06% 201116900 AU0901016 31953twf.doc/n Please refer to Table 1. It can be seen from Table I that the angle between the first angle 0丨 and the second angle Θ2 can be adjusted. Adjust the light leakage rate. In other embodiments, as shown in FIG. 2B, the example surface 132 of the recessed structure may have a first segment surface 132a, a second segment surface (10) and a third segment surface 132c, and the first segment surface 132a and the recessed structure. The 13-axis axis G has a first angle Θ1, and the second-stage surface 132b and the axis G have a second second angle Θ2'. The third-stage surface 132e and the axial line have a third angle Θ3. The second angle is smaller than the third angle and greater than the first angle <9 1. Table 2 lists the light leakage rates of the recessed knots 130 in the optical plate 12A at different turning heights Db and D2 and the first, second, and second angles Θ3. Table 2 Θ1Γ) 20 ---*Ί 20 Θ2 (° ) 22.5 ------- ~丨丨~ 25 (93 (°) 32.5 ---— 32.5 D1 (mm) 4 ~—, 3.5 D2 (mm) 5 ------, --- 5 Light leakage rate 2.88% 1.68% As can be seen from Table 2, it can be adjusted by adjusting the angle between the first angle 01, the second refresh angle μ and the angle of the second angle 03 Light leakage rate. In the present embodiment, the light-emitting structure 14 is disposed on the lower surface 124 of the optical plate, and the light-emitting structure Η0 is, for example, a patterned reflective layer. Figure 201116900 AU0901016 31953twf.doc/n The reflective layer can be dotted. The configuration of the method is configured in such a manner as to have an effect of optical homogenization, and the material of the patterned reflective layer may be a south reflective material such as ink. The light L generated by the light source 11〇 located below the recessed structure 13〇 may be The side surface 132 of the recessed structure 130 produces total reflection and continues to be at least - total total reflection within the optical plate 120 until the light exiting structure 140 is exposed to exit the optical plate 120. In other words, when the light L is totally reflected within the optical plate 12A In the process, when the light-emitting structure is encountered, the total reflection φ effect will be destroyed, such as The light L can be emitted from the optical plate 12 to emit light. In this embodiment, the light L can be totally reflected by one or more times in the optical plate 12A until the light-emitting structure 140 is received to emit the optical plate 12A.出 ^, the light-emitting structure 140 can disperse the light-emitting position of the light l, and help to improve the light-emitting uniformity of the light-emitting device 100. In detail, the light generated by the light source 11 遇到 before the light-emitting structure 140 is encountered [on the optical plate The angle of incidence (or angle of reflection) within 12 会 will remain at a total reflection angle <9 F, and after the light-emitting structure 140 is encountered, the angle of reflection (or angle of incidence) of the light L in the optical plate 120 will change. The total reflection is destroyed and the light is emitted from the upper surface 22 of the optical plate 12. Further, in the following embodiments of Figs. 4 to 9, the reflection path of the light in the optical plate 120 is similar to that in the figure. The reflection path of the light L in the optical plate 120. In the present embodiment, the light source 110 can be disposed on a substrate 15A. In detail, the substrate 150 can be a circuit board and has a plurality of substrates 15 Grooves 152, each of which can be located correspondingly A recessed structure 13 〇 is below, and the light source 110 can be disposed in the recess 152 and electrically connected to the substrate 15 . In addition, the light utilization rate of the booster light source no can be selected in the recession m 201116900 AU0901016 31953twf.doc/ A reflective layer (not shown) is formed on the inner wall 152a of the n to reflect the light that is incident on the inner wall 152a. Further, a light-transmitting colloid 160 may be filled in the recess 152 to cover and protect the light source 11'.
此外’透光膠體160中可摻雜有螢光粉體或是擴散粒 子，以調整發光裝置1〇〇所發出的光的顏色或者是提升發 光裝置100的出光均勻度。透光膠體160與光學板12〇可 以是一體成型也可以是各自成型，且透光膠體16〇的材質 與光學板120的材質可以相同也可以不同。在本實施例 中，可在光學板120的上方配置一光學膜片17〇，光學膜 片170例如為增亮片、抗反射片、擴散片等可提升發光裝 置100的亮度或是出光均勻度的透光膜片。 圖4繪示本發明—實施例之發光裝置的剖面圖。請參 照圖4，本實施例之發光裝置400的結構相似於圖丨之發 光裝置100的結構，兩者的差異之處在於發光裝置4〇〇的 出光結構140是設置於光學板12〇的上表面122。出光結 構140例如為一圖案化反射層。類似地，當光源ιι〇之光Further, the light-transmitting colloid 160 may be doped with phosphor powder or diffusing particles to adjust the color of the light emitted by the light-emitting device 1 or to improve the light-emitting uniformity of the light-emitting device 100. The light-transmitting colloid 160 and the optical plate 12 may be integrally formed or formed separately, and the material of the transparent colloid 16〇 may be the same as or different from the material of the optical plate 120. In the embodiment, an optical film 17 is disposed above the optical plate 120. The optical film 170 is, for example, a brightness enhancement sheet, an anti-reflection sheet, a diffusion sheet, etc., which can improve the brightness or uniformity of the light-emitting device 100. Light transmissive film. 4 is a cross-sectional view showing a light-emitting device of the present invention. Referring to FIG. 4, the structure of the light-emitting device 400 of the present embodiment is similar to that of the light-emitting device 100 of the figure. The difference between the two is that the light-emitting structure 140 of the light-emitting device 4 is disposed on the optical plate 12A. Surface 122. The light exit structure 140 is, for example, a patterned reflective layer. Similarly, when the light source is light
線在，學板12G㈣行全反射的過程中，#糊出光結構 140 B了，全反射作用便會被破壞，如此便可使得光線乙射 出光4板120而出光。在本實施例巾，為力口強光學板⑶ 的下表面124的反射率’可在光學板12〇的下表面124上 配置一反射層410。 5繪示本發明另—實施例之發光裝置的剖面圖。智 二，I ’本實施例之發光裝置500的結構相似於圖1 ^ X 、置100的結構，兩者的差異之處在於發光裝置50 12 201116900 Auuyui016 31953twf.doc/n 的出光結構140包括一第一圖案化反射層142以及一第二 圖案化反射層144,且第一圖案化反射層142與第二圖案 化反射層144分別設置於光學板120的上表面122與下表 面124 ^第一圖案化反射層142為多個微結構（例如為半 圓形凸起）’且第一圖案化反射層142可破壞全反射以使得 光線L射出光學板120而出光，並可使射出光學板12〇之 光源集中增亮。第二圖案化反射層144可為網點結構，以 利於光線L射出光學板120的上表面122。 圖6A繪示本發明又一實施例之發光裝置的剖面圖， 圖6B纷示圖6A之發光裝置的一種變化。請參照圖， 本實施例之發光裝置600的結構相似於圖1之發光裝置 100的結構’兩者的差異之處在於發光裝置6〇〇更包括位 於光學板120與基板150之間的一黏著層610，且光學板 120與透光膠體160之間存在一空氣間隙S。在本實施例 中，當光由光源110表面出光時，由於空氣間隙s中的空 氣折射率小於透光耀·體160的折射率，因此，在透光膠體 160與空氣間隙S的交界面上，只有小於全反射角的光線 L才能射出透光膠體160，故空氣間隙s可限縮光線L入 射至光學板120的角度，進而產生聚光的效果。因此，射 入光學板120的光線l較容易照射到凹陷結構丨3〇而產生 全反射。 反之，請參照圖6B，若是透光膠體160直接連接光學 板120 (亦即不存在空氣間隙s)，由於透光膠體16〇的折 射率接近光學板120的折射率，因此，光源11〇表面發出 13 201116900 AU0901016 31953twf.doc/n 的光線L可以前述的全反射角的角度入射光學板Go，並 直接射出光學板120 ’而不會照射到凹陷結構13〇 、, 圖7繪示本發明再一實施例之發光裝置的剖面圖。靖 參照圖7，本實施例之發光裝置7〇〇的結構相似於‘;二 發光裝置100的結構，兩者的差異之處在於發光裝 的光學板120的上表面122為一非平面，以作為^光結構 140。詳細而言，在本實施例中，靠近凹陷結構13〇處:光 學板120的厚度大於遠離凹陷結構130處之光學板^2〇的 厚度。由於光學板120的上表面122為一非平面(例如是斜 面），因此光源110之光線L在光學板120内進行全反射的 過程中’當遇到光學板120之上表面122因斜面角度的關 係而導致全反射作用被破壞時，可使得光線L射出光學板 120而出光。 圖8繪示本發明一實施例之發光裝置的剖面圖。圖9 繪示圖8之發光裝置的一種變化結構。請參照圖8，本實 施例之發光裝置800的結構相似於圖6之發光裝置60〇的 結構，兩者的差異冬處在於發光裝置800的光學板12〇内 設置有一聚光結構810 (例如為一透鏡）’且聚光結構81〇 位於凹陷結構130的下方。聚光結構810可對光源11〇所 發出的光線產生聚光作用，而使光源110的發散角度縮 小’如此可使得更多光線能夠順利的在凹陷結構130產生 全反射，進而使光源110之光線在光學板120内持續進行 至少一次的全反射。在本實施例中，聚光結構810呈半球 狀。在其他實施例中’聚光結構810還可呈圓柱狀（如圖 14 201116900 AU0901016 31953twf.doc/n 9所示）。 圖10A繪示本發明一實施例之發光裝置的剖面圖。圖 10B繪示圖丨〇A之光學板的局部放大圖。 請同時參照圖10A與圖10B，本實施例之發光裝置 1000的結構相似於圖1之發光裝置1〇〇的結構，^者^差 異之處在於發光裝置1000的出光結構14〇為多個微结構 146 ’且發光裝置1000的光學板12〇之側表面126與:水 I 平面A之間具有一銳角夾角$。 在本實施例中，出光結構140為多個鋸齒狀的 146。微結構146的頂角可介於3〇。〜6〇。之間 結構146的高度Η可介於50微米〜200微米之間。 ' 微結構146可選擇性地設置於光學板12〇的下表面 124、上表面122或是同時設置在光學板12〇的下表面 與上表面122。當微結構146同時設置在光學板12〇的下 表面124與上表面122時，位於上表面122之微結構146 與位於下表面124之微結構146交錯設置。換言之，位於 齡 上纟面122之微結構146於基板150上的投影與位於下表 面124之微結構146於基板150上的投影可以是 疊或是彼此部分重疊。 請參照圖10Β，類似地，在本實施例中，當光源11〇 之光線L在光學板no内進行全反射而往光學板⑶的側 1傳遞時^當光線120遇到出光結構14〇或者是側表面126 時，將破壞全反射作用而使光社射出絲板12q而出光。 詳細而言，在遇到出光結構14〇之前，光源11〇所產 15 201116900 AU0901016 31953twf.doc/n 生的光線L於光學板120内的入射角（或反射角）會保持 在一全反射角0 f，而在遇到出光結構14〇之後，光線乙 於光學板120内的反射角（或入射角）會減少從而破壞全 反射作用並從光學板120的上表面122出光。 另外，在本實施例中，光學板120之下表面124更可 具有二開缝124a、124b，且開缝124a、124b分別位於凹 陷結構130的相對二侧。開縫124a、124b亦可作為出光結 構之用。詳細而言，當光源110之光線L在光學板12〇内 遇到凹陷結構130而產生全反射之後，可遇到開缝124a、 124b而破壞全反射作用從而射出光學板120的上表面122 而出光。 圖11繪示本發明一實施例之發光裝置的示意圖。請 參照圖11，本實施例之發光裝置11〇〇的結構相似於圖j 之發光裝置100的結構，兩者的差異之處在於發光裝置 Π00的出光結構140為多個位於下表面124的開缝148a、 148b、148c、148d、148e’且在這些開縫 148a、148b、148c、 148d、148e中，離光源1丨〇愈遠的開缝愈深（例如開缝 148e) ’反之，離光源110愈近的開缝愈淺（例如開缝 148a)。類似地，當光源110之光線在光學板12〇内進行全 反射而往光學板120的侧邊傳遞時，當光線12〇遇到開縫 148a、148b、148c、148d、148e時，將破壞全反射作用而 使光線L射出光學板120的上表面122而出光。 綜上所述，由於本發明的光學板内設置有凹陷結構， 而凹陷結構可使光源所發出的光線在凹陷結構處產生全反 16 201116900 AU0901016 31953twf.doc/n 射並持續於光學板内進行至少一次全反射直到遇到出光红 構才射出光學板’故凹陷結構可提升發光裝置的出光约^ 度。另外，由於光學板之凹陷結構的設計可使光源的光^ 往凹陷結構的四周發散，因此可進一步縮小光源所需的混 光距離。因而，本發明之光學板與光源之間的距離可以二 小的最低，甚至是直接貼合在一起。如此，將有助於發光 裝置之薄型化的發展趨勢。In the process of the total reflection of the 12G (four) line of the board, the light reflection structure 140 B, the total reflection effect will be destroyed, so that the light can be emitted to the light plate 4 and emit light. In the present embodiment, a reflective layer 410 may be disposed on the lower surface 124 of the optical plate 12A for the reflectance of the lower surface 124 of the optically strong optical plate (3). 5 is a cross-sectional view showing a light-emitting device according to another embodiment of the present invention.智二, I' The structure of the illuminating device 500 of the present embodiment is similar to the structure of FIG. 1 ^ X and 100, the difference between the two is that the light-emitting structure 140 of the illuminating device 50 12 201116900 Auuyui016 31953 twf.doc / n includes a a first patterned reflective layer 142 and a second patterned reflective layer 144, and the first patterned reflective layer 142 and the second patterned reflective layer 144 are respectively disposed on the upper surface 122 and the lower surface 124 of the optical plate 120. The patterned reflective layer 142 is a plurality of microstructures (eg, semi-circular protrusions)' and the first patterned reflective layer 142 can destroy the total reflection such that the light L exits the optical plate 120 to emit light, and can be emitted to the optical plate 12 The light source of the 〇 is concentrated. The second patterned reflective layer 144 can be a dot structure to facilitate the emission of light L from the upper surface 122 of the optical plate 120. 6A is a cross-sectional view of a light emitting device according to still another embodiment of the present invention, and FIG. 6B is a view showing a variation of the light emitting device of FIG. 6A. Referring to the drawings, the structure of the light-emitting device 600 of the present embodiment is similar to the structure of the light-emitting device 100 of FIG. 1 in that the light-emitting device 6 further includes an adhesive layer between the optical plate 120 and the substrate 150. The layer 610 has an air gap S between the optical plate 120 and the transparent colloid 160. In the present embodiment, when the light is emitted from the surface of the light source 110, since the refractive index of the air in the air gap s is smaller than the refractive index of the light transmitting body 160, at the interface between the transparent colloid 160 and the air gap S, Only the light L of less than the total reflection angle can emit the light-transmitting colloid 160, so the air gap s can limit the angle at which the light L is incident on the optical plate 120, thereby generating the effect of collecting light. Therefore, the light ray 1 incident on the optical plate 120 is more easily irradiated to the recessed structure 〇3〇 to cause total reflection. On the contrary, referring to FIG. 6B, if the transparent colloid 160 is directly connected to the optical plate 120 (that is, there is no air gap s), since the refractive index of the transparent colloid 16 is close to the refractive index of the optical plate 120, the surface of the light source 11 is The light L emitted 13 201116900 AU0901016 31953twf.doc/n can be incident on the optical plate Go at an angle of the aforementioned total reflection angle, and directly exits the optical plate 120 ′ without illuminating the concave structure 13 ,, and FIG. 7 illustrates the present invention. A cross-sectional view of a light emitting device of an embodiment. Referring to FIG. 7, the structure of the light-emitting device 7A of the present embodiment is similar to that of the structure of the second light-emitting device 100, and the difference between the two is that the upper surface 122 of the light-emitting device 120 is a non-planar surface. As the light structure 140. In detail, in the present embodiment, near the recessed structure 13〇: the thickness of the optical plate 120 is greater than the thickness of the optical plate 2 away from the recessed structure 130. Since the upper surface 122 of the optical plate 120 is a non-planar (e.g., beveled), the light L of the light source 110 is in the process of total reflection in the optical plate 120 'when it encounters the upper surface 122 of the optical plate 120 due to the bevel angle When the relationship causes the total reflection to be broken, the light L can be emitted from the optical plate 120 to emit light. Figure 8 is a cross-sectional view showing a light emitting device according to an embodiment of the present invention. Figure 9 is a diagram showing a variation of the illuminating device of Figure 8. Referring to FIG. 8, the structure of the illuminating device 800 of the present embodiment is similar to that of the illuminating device 60A of FIG. 6. The difference between the two is that a concentrating structure 810 is disposed in the optical plate 12 of the illuminating device 800 (for example, It is a lens) and the concentrating structure 81 is located below the recess structure 130. The concentrating structure 810 can condense the light emitted by the light source 11 ,, and reduce the divergence angle of the light source 110. Thus, more light can smoothly generate total reflection in the concave structure 130, thereby causing the light of the light source 110. At least one total reflection continues in the optical plate 120. In the present embodiment, the concentrating structure 810 is hemispherical. In other embodiments, the concentrating structure 810 can also be cylindrical (as shown in Figure 14 201116900 AU0901016 31953 twf.doc/n 9). Fig. 10A is a cross-sectional view showing a light-emitting device according to an embodiment of the present invention. Fig. 10B is a partial enlarged view of the optical plate of Fig. A. 10A and FIG. 10B, the structure of the light-emitting device 1000 of the present embodiment is similar to that of the light-emitting device 1A of FIG. 1. The difference is that the light-emitting structure 14 of the light-emitting device 1000 is a plurality of micro-structures. The structure 146' and the side surface 126 of the optical plate 12 of the light-emitting device 1000 have an acute angle between the surface I and the water I plane A. In the present embodiment, the light exiting structure 140 is a plurality of serrated 146. The apex angle of the microstructure 146 can be between 3 turns. ~6〇. The height Η of the structure 146 may be between 50 microns and 200 microns. The microstructures 146 may be selectively disposed on the lower surface 124 of the optical plate 12A, the upper surface 122, or both the lower surface and the upper surface 122 of the optical plate 12A. When the microstructures 146 are simultaneously disposed on the lower surface 124 and the upper surface 122 of the optical plate 12A, the microstructures 146 on the upper surface 122 and the microstructures 146 on the lower surface 124 are staggered. In other words, the projection of the microstructures 146 on the substrate 150 and the projections of the microstructures 146 located on the lower surface 124 on the substrate 150 may be stacked or partially overlap each other. Referring to FIG. 10A, similarly, in the present embodiment, when the light L of the light source 11 is totally reflected in the optical plate no and transmitted to the side 1 of the optical plate (3), when the light 120 encounters the light-emitting structure 14 or When it is the side surface 126, the total reflection effect will be destroyed, and the light will be emitted from the wire board 12q to emit light. In detail, before the light-emitting structure 14〇 is encountered, the incident angle (or reflection angle) of the light L of the light source 11 produced by the light source 11 于 in the optical plate 120 is maintained at a total reflection angle. 0 f, and after encountering the light exiting structure 14 , the angle of reflection (or angle of incidence) of the light B in the optical plate 120 is reduced to destroy the total reflection and emit light from the upper surface 122 of the optical plate 120. In addition, in this embodiment, the lower surface 124 of the optical plate 120 may further have two slits 124a, 124b, and the slits 124a, 124b are respectively located on opposite sides of the recessed structure 130. The slits 124a, 124b can also be used as a light-emitting structure. In detail, after the light L of the light source 110 encounters the recessed structure 130 in the optical plate 12 to cause total reflection, the slits 124a, 124b may be encountered to destroy the total reflection to emit the upper surface 122 of the optical plate 120. sold out. FIG. 11 is a schematic diagram of a light emitting device according to an embodiment of the invention. Referring to FIG. 11, the structure of the light-emitting device 11A of the present embodiment is similar to that of the light-emitting device 100 of FIG. j, and the difference between the two is that the light-emitting structure 140 of the light-emitting device 00 is a plurality of openings located on the lower surface 124. The slits 148a, 148b, 148c, 148d, 148e' and in these slits 148a, 148b, 148c, 148d, 148e, the further the slit from the light source 1 is deeper (for example, the slit 148e) 'instead, the light source The closer the slit is, the shallower the seam (for example, the slit 148a). Similarly, when the light of the light source 110 is totally reflected in the optical plate 12〇 and transmitted to the side of the optical plate 120, when the light 12〇 encounters the slits 148a, 148b, 148c, 148d, 148e, it will destroy the whole The light is emitted to cause the light L to exit the upper surface 122 of the optical plate 120 to emit light. In summary, since the optical plate of the present invention is provided with a recessed structure, the recessed structure can cause the light emitted by the light source to generate a full-reflection at the recessed structure and continue in the optical plate. At least one total reflection until the light red structure is encountered to emit the optical plate', so the recessed structure can enhance the light output of the light-emitting device. In addition, since the design of the recessed structure of the optical plate allows the light of the light source to diverge around the recessed structure, the required mixing distance of the light source can be further reduced. Thus, the distance between the optical plate of the present invention and the light source can be as small as a minimum, or even directly bonded together. As such, it will contribute to the trend of thinning of the light-emitting device.
雖然本發明已以實施例揭露如上，然其並非用以限定 本發明，任何所屬技術領域中具有通常知識者，在不脫離 本發明之精神和範_，當可作些許之更動與潤飾，故本 發明之保護範圍當概附之ΐ請專職騎界定者為準。 圖式簡單說明】 圖1綠示本發明—實施例之發光裝置的剖面圖。 圖2Α繪示圖1之發光裝置的凹陷結構的玫大圖 圖2Β繪示圖2Α之凹陷結構的一種變化結構。 圖3Α繪示圖1之發光裝置的凹陷結構的示音 圖犯績示圖3Α之凹陷結構的一種變化結^ ^ ί示本發明—實施例之發光裝置的剖面圖。 "、，日不本發明另一實施例之發光裝置的剖面同 二认繪示本發明又一實施例之發光農置的J :6Bj會示圖6Α之發光裝置的一種變化。 示本發明再—實施例之發光裝 、曰不本發明—實施例之發光裝置的剖面圖。 17 201116900 AU0901016 31953twf.doc/n 圖9繪示圖8之發光裝置的一種變化結構。 圖10A繪示本發明一實施例之發光裝置的剖面圖。 圖10B繪示圖10A之光學板的局部放大圖。 圖11繪示本發明一實施例之發光裝置的示意圖。 【主要元件符號說明】 100、400、500、600、700、800、1000、1100 :發光 裝置 110 :光源 120 :光學板 122 :上表面 124 :下表面 124a、124b :開縫 126 .側表面 130 :凹陷結構 132:側表面 132a :第一段表面 132b :第二段表面 13九：第三段表面 140 :出光結構 142 :第一圖案化反射層 144 :第二圖案化反射層 146 :微結構 148a、148b ' 148c、148d、148e :開缝 18 201116900 AU0901016 31953twf.doc/n 150 :基板 152 :凹槽 152a :内壁 160 :透光膠體 170 :光學膜片 410 :反射層 610 :黏著層 810 :聚光結構 ® A:水平面 D、Dl、D2 :轉折高度 G :轴心線 Η :高度 L :光線 S :空氣間隙 Τ:光學板的厚度 W:發光二極體晶片的寬度 • 0 :夾角 Θ1:第一夾角 Θ2 :第二夾角 Θ3 :第三夾角 Θ 4 :頂角 6»F :全反射角 19The present invention has been disclosed in the above embodiments, and is not intended to limit the present invention. Any person having ordinary knowledge in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of protection of the invention is subject to the full definition of the rider. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a light-emitting device of the present invention. 2 is a plan view showing a recessed structure of the light-emitting device of FIG. 1. FIG. 2 is a diagram showing a modified structure of the recessed structure of FIG. Figure 3 is a cross-sectional view showing the structure of the recessed structure of the light-emitting device of Figure 1. Figure 3 is a cross-sectional view of the light-emitting device of the present invention. ", a cross-section of a light-emitting device according to another embodiment of the present invention is the same as that of a light-emitting device of another embodiment of the present invention. A cross-sectional view of a light-emitting device according to a second embodiment of the present invention. 17 201116900 AU0901016 31953twf.doc/n FIG. 9 illustrates a variation of the light-emitting device of FIG. Fig. 10A is a cross-sectional view showing a light-emitting device according to an embodiment of the present invention. FIG. 10B is a partial enlarged view of the optical plate of FIG. 10A. FIG. 11 is a schematic diagram of a light emitting device according to an embodiment of the invention. [Main component symbol description] 100, 400, 500, 600, 700, 800, 1000, 1100: light-emitting device 110: light source 120: optical plate 122: upper surface 124: lower surface 124a, 124b: slit 126. side surface 130 : recessed structure 132: side surface 132a: first segment surface 132b: second segment surface 13 nine: third segment surface 140: light-emitting structure 142: first patterned reflective layer 144: second patterned reflective layer 146: microstructure 148a, 148b '148c, 148d, 148e: slit 18 201116900 AU0901016 31953twf.doc/n 150: substrate 152: groove 152a: inner wall 160: light-transmitting colloid 170: optical film 410: reflective layer 610: adhesive layer 810: Concentrating structure® A: horizontal plane D, Dl, D2: turning height G: axis Η: height L: light S: air gap Τ: thickness of the optical plate W: width of the light-emitting diode wafer • 0: angle Θ1 : first angle Θ 2 : second angle Θ 3 : third angle Θ 4 : apex angle 6»F : total reflection angle 19