TWI453507B - Light source module - Google Patents
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- TWI453507B TWI453507B TW100149636A TW100149636A TWI453507B TW I453507 B TWI453507 B TW I453507B TW 100149636 A TW100149636 A TW 100149636A TW 100149636 A TW100149636 A TW 100149636A TW I453507 B TWI453507 B TW I453507B
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本發明是有關於一種光學模組，且特別是有關於一種光源模組。The present invention relates to an optical module, and more particularly to a light source module.
習知的平板式光源模組可作為液晶顯示器的背光模組，以作為本身不會發光的液晶顯示面板的背光源或是直接作為燈具的面光源。平板式光源模組可分為直下式光源模組與側入式光源模組。習知的側入式光源模組包括發光元件、導光板、反射片、下擴散片、兩片稜鏡延伸方向正交的稜鏡片及上擴散片。發光元件所發出的光經由導光板的入光面進入導光板中，並接著受到導光板底部的散射微結構的作用而射出導光板外。反射片可將光反射回導光板，並經由導光板傳遞至下擴散片。下擴散片與上擴散片可使光產生擴散效果，以增進光源模組所提供的面光源的均勻性。另一方面，稜鏡片則可使光的發散角縮小，以提升光源模組所能提供的亮度。The conventional flat light source module can be used as a backlight module of a liquid crystal display, as a backlight of a liquid crystal display panel that does not emit light by itself or as a surface light source directly used as a light fixture. The flat light source module can be divided into a direct light source module and a side input light source module. The conventional side-entry light source module includes a light-emitting element, a light guide plate, a reflection sheet, a lower diffusion sheet, two cymbals in which the 稜鏡 extension direction is orthogonal, and an upper diffusion sheet. The light emitted by the light-emitting element enters the light guide plate through the light-incident surface of the light guide plate, and is then emitted outside the light guide plate by the scattering microstructure at the bottom of the light guide plate. The reflective sheet reflects the light back to the light guide plate and transmits it to the lower diffusion sheet via the light guide plate. The lower diffusion sheet and the upper diffusion sheet can diffuse light to enhance the uniformity of the surface light source provided by the light source module. On the other hand, the cymbal can reduce the divergence angle of the light to enhance the brightness that the light source module can provide.
在習知技術中，下擴散片、兩片稜鏡片及上擴散片是依序堆疊於導光板上，而反射片則配置於導光板的另一側。如此一來，在側入式光源模組的厚度方向上便堆疊了五片光學膜片，而使得側入式光源模組的厚度難以縮小。In the prior art, the lower diffusion sheet, the two dies and the upper diffusion sheet are sequentially stacked on the light guide plate, and the reflection sheet is disposed on the other side of the light guide plate. In this way, five optical films are stacked in the thickness direction of the side-entry light source module, so that the thickness of the side-entry light source module is difficult to be reduced.
此外，為了使側入式光源模組的厚度變薄，習知技術是採用減少光學膜片的厚度。然而，當光學膜片的厚度變薄時，其機械特性亦隨之弱化，而造成光學膜不平整的現象。舉例而言，當擴散片配置於稜鏡片的稜鏡上時，弱化的機械特性將造成擴散片的部分區域與稜鏡接觸，而其他區域則與稜鏡保持較大的空氣間隙的光學膜不平整的現象，進而造成不同區域中的穿透光強度不同的現象，而使側入式光源模組所提供的面光源之亮度不均勻。Further, in order to make the thickness of the side-entry light source module thin, the conventional technique is to reduce the thickness of the optical film. However, when the thickness of the optical film is thinned, the mechanical properties thereof are also weakened, resulting in an unevenness of the optical film. For example, when the diffusion sheet is disposed on the cymbal of the cymbal, the weakened mechanical properties will cause partial regions of the diffusion sheet to contact the cymbal, while other regions will not maintain an optical gap with the cymbal. The flat phenomenon causes the phenomenon of different transmitted light in different regions, and the brightness of the surface light source provided by the side-in type light source module is not uniform.
另一方面，當光學膜片局部帶有靜電，將造成光學膜片的局部沾黏的現象，進而造成光學膜不平整的現象惡化。On the other hand, when the optical film is partially electrostatically charged, it will cause local sticking of the optical film, and the phenomenon that the optical film is uneven will be deteriorated.
美國專利第7046905號、中華民國專利第M358989號、中華民國專利第M311911號及中華民國專利第M321111號分別揭露了四種導光板。此外，美國專利第5771328號及中華民國專利第I346798號分別揭露了兩種光學膜片。Four types of light guide plates are disclosed in U.S. Patent No. 7,046,905, the Republic of China Patent No. M358989, the Republic of China Patent No. M311911, and the Republic of China Patent No. M321111, respectively. In addition, two types of optical films are disclosed in U.S. Patent No. 5,771,328 and U.S. Patent No. 1,346,798, respectively.
本發明提供一種光源模組，此光源模組的結構有助於減少光源模組所使用的光學膜片的數量，且有助於減輕光學膜片與導光板的局部區域沾黏的現象。The invention provides a light source module. The structure of the light source module helps to reduce the number of optical films used by the light source module, and helps to reduce the adhesion of the optical film and the local area of the light guide plate.
本發明的其他目的和優點可以從本發明所揭露的技術特徵中得到進一步的了解。Other objects and advantages of the present invention will become apparent from the technical features disclosed herein.
為達上述之一或部份或全部目的或是其他目的，本發明之一實施例提出一種光源模組，包括導光板、至少一發光元件及反射元件。導光板包括第一表面、第二表面、入光面、複數個第一條狀光學結構及複數個第二條狀光學結構。第二表面相對於第一表面，且入光面連接第一表面與第二表面。這些第一條狀光學結構配置於第一表面上，且這些第二條狀光學結構配置於第一表面上。相鄰二第一條狀光學結構之間設有至少一第二條狀光學結構，且每一第一條狀光學結構在垂直於第二表面的方向上的高度不等於每一第二條狀光學結構在垂直於第二表面的方向上的高度。發光元件配置於入光面旁，且反射元件配置於第二表面的一側，其中第二表面位於反射元件與第一表面之間。In order to achieve one or a part or all of the above or other purposes, an embodiment of the present invention provides a light source module including a light guide plate, at least one light emitting element, and a reflective element. The light guide plate includes a first surface, a second surface, a light incident surface, a plurality of first strip-shaped optical structures, and a plurality of second strip-shaped optical structures. The second surface is opposite to the first surface, and the light incident surface connects the first surface and the second surface. The first strip-shaped optical structures are disposed on the first surface, and the second strip-shaped optical structures are disposed on the first surface. Between the two adjacent first strip-shaped optical structures, at least one second strip-shaped optical structure is disposed, and a height of each of the first strip-shaped optical structures in a direction perpendicular to the second surface is not equal to each second strip The height of the optical structure in a direction perpendicular to the second surface. The light emitting element is disposed beside the light incident surface, and the reflective element is disposed on one side of the second surface, wherein the second surface is located between the reflective element and the first surface.
本發明之一實施例的光源模組，其中相鄰二第一條狀光學結構之間設有N個第二條狀光學結構，3≦N≦6，且N為正整數。In a light source module according to an embodiment of the present invention, N second strip-shaped optical structures are disposed between two adjacent first strip-shaped optical structures, 3≦N≦6, and N is a positive integer.
本發明之一實施例的光源模組，其中每一第一條狀光學結構在垂直於第二表面的方向上的高度大於每一第二條狀光學結構在垂直於第二表面的方向上的高度。A light source module according to an embodiment of the present invention, wherein a height of each of the first strip-shaped optical structures in a direction perpendicular to the second surface is greater than a direction of each of the second strip-shaped optical structures in a direction perpendicular to the second surface height.
本發明之一實施例的光源模組，其中每一第一條狀光學結構呈三角柱狀，且每一第二條狀光學結構呈三角柱狀。In a light source module according to an embodiment of the present invention, each of the first strip-shaped optical structures has a triangular column shape, and each of the second strip-shaped optical structures has a triangular column shape.
本發明之一實施例的光源模組，其中每一第一條狀光學結構具有一指向遠離第二表面的方向之第一頂角，每一第二條狀光學結構具有一指向遠離第二表面的方向之第二頂角。A light source module according to an embodiment of the present invention, wherein each of the first strip-shaped optical structures has a first apex angle pointing away from the second surface, and each of the second strip-shaped optical structures has a pointing away from the second surface The second corner of the direction.
本發明之一實施例的光源模組，其中每一第一條狀光學結構具有一指向遠離第二表面的方向之第一頂角，每一第二條狀光學結構具有一指向遠離第二表面的方向之第二頂角，第一頂角為圓角，且第二頂角為圓角。A light source module according to an embodiment of the present invention, wherein each of the first strip-shaped optical structures has a first apex angle pointing away from the second surface, and each of the second strip-shaped optical structures has a pointing away from the second surface The second apex angle of the direction, the first apex angle is a rounded corner, and the second apex angle is a rounded corner.
本發明之一實施例的光源模組，其中每一該第一條狀光學結構具有圓柱面，且每一個第二條狀光學結構具有圓柱面。In a light source module according to an embodiment of the present invention, each of the first strip-shaped optical structures has a cylindrical surface, and each of the second strip-shaped optical structures has a cylindrical surface.
本發明之一實施例的光源模組，其中沿著第一方向上排列之相鄰二第一條狀光學結構之間設有至少一第二條狀光學結構，且沿著第二方向上排列之相鄰二第一條狀光學結構之間設有至少一第二條狀光學結構。A light source module according to an embodiment of the present invention, wherein at least one second strip-shaped optical structure is disposed between adjacent two first strip-shaped optical structures arranged along the first direction, and arranged along the second direction At least one second strip-shaped optical structure is disposed between the adjacent two first strip-shaped optical structures.
本發明之一實施例的光源模組，其中每一第一條狀光學結構具有：第一端面，相對於第二表面傾斜；第二端面，相對於第一端面，且相對於第二表面傾斜；第一條狀稜面，連接第一端面與第二端面，且相對於第二表面傾斜；以及第二條狀稜面，連接第一端面與第二端面，且相對於第二表面傾斜，其中第一條狀稜面的傾斜方向不同於第二條狀稜面的傾斜方向，且每一第二條狀光學結構具有：第三端面，相對於第二表面傾斜；第四端面，相對於第三端面，且相對於第二表面傾斜；第三條狀稜面，連接第三端面與第四端面，且相對於第二表面傾斜；以及第四條狀稜面，連接第三端面與第四端面，且相對於第二表面傾斜，其中第三條狀稜面的傾斜方向不同於第四條狀稜面的傾斜方向。A light source module according to an embodiment of the present invention, wherein each of the first strip-shaped optical structures has a first end surface that is inclined with respect to the second surface, and a second end surface that is inclined with respect to the first end surface and opposite to the second surface a first strip surface connecting the first end surface and the second end surface and inclined with respect to the second surface; and a second strip surface portion connecting the first end surface and the second end surface and inclined with respect to the second surface The oblique direction of the first strip surface is different from the tilt direction of the second strip surface, and each second strip optical structure has: a third end surface inclined with respect to the second surface; and a fourth end surface opposite to a third end surface inclined with respect to the second surface; a third strip-shaped prism surface connecting the third end surface and the fourth end surface and inclined with respect to the second surface; and a fourth strip-shaped prism surface connecting the third end surface and the third end surface The four end faces are inclined with respect to the second surface, wherein the oblique direction of the third strip-shaped facet is different from the inclined direction of the fourth strip-shaped facet.
本發明之一實施例的光源模組，其中每一第一條狀光學結構的延伸方向實質上平行於每一第二條狀光學結構的延伸方向。In a light source module according to an embodiment of the present invention, the extending direction of each of the first strip-shaped optical structures is substantially parallel to the extending direction of each of the second strip-shaped optical structures.
本發明之一實施例的光源模組，其中第一方向不等於第二方向。A light source module according to an embodiment of the present invention, wherein the first direction is not equal to the second direction.
本發明之一實施例的光源模組，其中每一第一條狀光學結構在垂直於第二表面的方向上的高度大於每一第二條狀光學結構在垂直於第二表面的方向上的高度。A light source module according to an embodiment of the present invention, wherein a height of each of the first strip-shaped optical structures in a direction perpendicular to the second surface is greater than a direction of each of the second strip-shaped optical structures in a direction perpendicular to the second surface height.
本發明之一實施例的光源模組，其中每一第一條狀光學結構由靠近入光面的一側往遠離入光面的一側延伸，且每一第二條狀光學結構由靠近入光面的一側往遠離入光面的一側延伸。In a light source module according to an embodiment of the present invention, each of the first strip-shaped optical structures extends from a side close to the light incident surface to a side away from the light incident surface, and each second strip optical structure is close to One side of the smooth surface extends toward the side far from the light incident surface.
本發明之一實施例的光源模組，更包括至少一光學膜片，配置於第一表面上。The light source module of an embodiment of the present invention further includes at least one optical film disposed on the first surface.
本發明之一實施例的光源模組，其中至少一光學膜片為稜鏡片、擴散片或其組合。In a light source module according to an embodiment of the present invention, at least one of the optical films is a gusset, a diffusion sheet or a combination thereof.
在本發明之實施例之光源模組中，由於相鄰二第一條狀光學結構之間設有至少一第二條狀光學結構，且每一第一條狀光學結構在垂直於第二表面的方向上的高度不等於每一第二條狀光學結構在垂直於第二表面的方向上的高度，因此當導光板的第一表面上方配置有光學膜片時，便可藉由高度較高的條狀光學結構來與光學膜片接觸。如此一來，便可減少導光板與光學膜片的接觸面積，以減輕導光板與光學膜片之局部區域沾黏的現象，進而提升光源模組所提供的面光源的均勻度。此外，由於第一條狀光學結構與第二條狀光學結構是整合於導光板的第一表面上，因此本發明之實施例之光源模組有助於減少光源模組所使用的光學膜片的數量，進而可使光源模組的整體厚度有效減少。In the light source module of the embodiment of the present invention, at least one second strip-shaped optical structure is disposed between two adjacent first strip-shaped optical structures, and each of the first strip-shaped optical structures is perpendicular to the second surface. The height in the direction is not equal to the height of each second strip-shaped optical structure in a direction perpendicular to the second surface, so that when the optical film is disposed above the first surface of the light guide plate, the height can be higher The strip optical structure is in contact with the optical film. In this way, the contact area between the light guide plate and the optical film can be reduced to reduce the adhesion of the light guide plate and the local area of the optical film, thereby improving the uniformity of the surface light source provided by the light source module. In addition, since the first strip-shaped optical structure and the second strip-shaped optical structure are integrated on the first surface of the light guide plate, the light source module of the embodiment of the invention helps to reduce the optical film used by the light source module. The number, in turn, can effectively reduce the overall thickness of the light source module.
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。The above described features and advantages of the present invention will be more apparent from the following description.
有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之一較佳實施例的詳細說明中，將可清楚的呈現。以下實施例中所提到的方向用語，例如：上、下、左、右、前或後等，僅是參考附加圖式的方向。因此，使用的方向用語是用來說明並非用來限制本發明。The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.
圖1A為本發明之一實施例之光源模組的立體示意圖，圖1B為圖1A之光源模組沿著I-I線的局部剖面示意圖，而圖1C為圖1A之光源模組沿著II-II線的局部剖面示意圖。請參照圖1A至圖1C，本實施例之光源模組100包括一導光板110、至少一發光元件120(圖1A中是以複數個發光元件120為例，但本發明不以此為限)及一反射元件130。導光板110包括一第一表面112、一第二表面114、一入光面116、複數個第一條狀光學結構140及複數個第二條狀光學結構150。第二表面114相對於第一表面112，且入光面116連接第一表面112與第二表面114。這些第一條狀光學結構140配置於第一表面112上，且這些第二條狀光學結構150配置於第一表面112上。相鄰二第一條狀光學結構140之間設有至少一第二條狀光學結構150(圖1A中是以三個第二條狀光學結構150為例，但本發明不以此為限)，且每一第一條狀光學結構140在垂直於第二表面114的方向上的高度H1不等於每一第二條狀光學結構150在垂直於第二表面114的方向上的高度H2。在本實施例中，高度H1大於高度H2，但本發明不以此為限。1A is a perspective view of a light source module according to an embodiment of the present invention, FIG. 1B is a partial cross-sectional view of the light source module of FIG. 1A along line II, and FIG. 1C is a light source module of FIG. 1A along II-II A schematic view of a partial section of the line. Referring to FIG. 1A to FIG. 1C , the light source module 100 of the present embodiment includes a light guide plate 110 and at least one light emitting element 120 (in FIG. 1A , a plurality of light emitting elements 120 are taken as an example, but the invention is not limited thereto). And a reflective element 130. The light guide plate 110 includes a first surface 112, a second surface 114, a light incident surface 116, a plurality of first strip-shaped optical structures 140, and a plurality of second strip-shaped optical structures 150. The second surface 114 is opposite to the first surface 112, and the light incident surface 116 connects the first surface 112 and the second surface 114. The first strip-shaped optical structures 140 are disposed on the first surface 112 , and the second strip-shaped optical structures 150 are disposed on the first surface 112 . At least one second strip-shaped optical structure 150 is disposed between two adjacent first strip-shaped optical structures 140 (in FIG. 1A, three second strip-shaped optical structures 150 are taken as an example, but the invention is not limited thereto) And the height H1 of each of the first strip-shaped optical structures 140 in a direction perpendicular to the second surface 114 is not equal to the height H2 of each of the second strip-shaped optical structures 150 in a direction perpendicular to the second surface 114. In the present embodiment, the height H1 is greater than the height H2, but the invention is not limited thereto.
發光元件120配置於入光面116旁。在本實施例中，發光元件120例如為發光二極體(light-emitting diode,LED)，其例如是沿著實質上平行於入光面116的一第一方向D1排列。然而，在另一實施例中，亦可採用一冷陰極螢光燈管來取代這些發光二極體，其中冷陰極螢光燈管例如是沿著第一方向D1延伸。或者，在其他實施例中，亦可採用其他適當的發光元件來取代這些發光二極體。The light emitting element 120 is disposed beside the light incident surface 116. In the present embodiment, the light-emitting element 120 is, for example, a light-emitting diode (LED), which is arranged, for example, along a first direction D1 substantially parallel to the light-incident surface 116. However, in another embodiment, a cold cathode fluorescent lamp may be used instead of the light emitting diodes, wherein the cold cathode fluorescent lamp extends, for example, along the first direction D1. Alternatively, in other embodiments, other suitable light-emitting elements may be used in place of these light-emitting diodes.
反射元件130配置於第二表面114的一側，其中第二表面114位於反射元件130與第一表面112之間。在本實施例中，反射元件130例如為一反射片。The reflective element 130 is disposed on one side of the second surface 114 with the second surface 114 between the reflective element 130 and the first surface 112. In the present embodiment, the reflective element 130 is, for example, a reflective sheet.
在本實施例中，發光元件120適於發出一照明光122，照明光122經由入光面116進入導光板110後，則不斷地被第一表面112與第二表面114全反射而被局限於導光板110中。然而，第二表面114上的光學微結構115則可破壞全反射，並使部分照明光122散射至第一表面112，並穿透第一表面112。此外，光學微結構115使另一部分照明光122散射至反射元件130(圖未示)，而反射元件130將照明光122反射回導光板110，並使照明光122依序穿透第二表面114及第一表面112。在本實施例中，光學微結構115例如為網點、凸點、凹點、凸紋、凹紋、適當的幾何形凸起、適當的幾何形凹陷、散射材料或其組合。In this embodiment, the illuminating element 120 is adapted to emit an illumination light 122. After entering the light guide plate 110 via the light incident surface 116, the illumination light 122 is continuously reflected by the first surface 112 and the second surface 114 to be limited. In the light guide plate 110. However, the optical microstructures 115 on the second surface 114 can destroy total reflection and scatter some of the illumination light 122 to the first surface 112 and through the first surface 112. In addition, the optical microstructures 115 scatter another portion of the illumination light 122 to the reflective element 130 (not shown), while the reflective element 130 reflects the illumination light 122 back to the light guide plate 110 and causes the illumination light 122 to sequentially penetrate the second surface 114. And the first surface 112. In the present embodiment, optical microstructures 115 are, for example, dots, bumps, pits, ridges, indentations, suitable geometric protrusions, suitable geometric depressions, scattering materials, or combinations thereof.
在本實施例中，每一第一條狀光學結構140呈三角柱狀，且每一第二條狀光學結構150呈三角柱狀。此外，在本實施例中，每一第一條狀光學結構140由靠近入光面116的一側往遠離入光面116的一側延伸，且每一第二條狀光學結構150由靠近入光面116的一側往遠離入光面116的一側延伸。具體而言，在本實施例中，這些第一條狀光學結構140與這些第二條狀光學結構150沿著第一方向D1排列，每一第一條狀光學結構140沿著第二方向D2延伸，且每一第二條狀光學結構150沿著第二方向D2延伸，其中第一方向D1例如實質上平行於入光面116與第二表面114，且第二方向例如實質上垂直於第一方向D1且實質上垂直於入光面116。第一條狀光學結構140與第二條狀光學結構150可達到使照明光122的發散角收斂的效果。In this embodiment, each of the first strip-shaped optical structures 140 has a triangular column shape, and each of the second strip-shaped optical structures 150 has a triangular column shape. In addition, in this embodiment, each of the first strip-shaped optical structures 140 extends from a side close to the light-incident surface 116 to a side away from the light-incident surface 116, and each of the second strip-shaped optical structures 150 is close to One side of the smooth surface 116 extends toward a side away from the light incident surface 116. Specifically, in the embodiment, the first strip-shaped optical structures 140 and the second strip-shaped optical structures 150 are arranged along the first direction D1, and each of the first strip-shaped optical structures 140 is along the second direction D2. Extending, and each of the second strip-shaped optical structures 150 extends along the second direction D2, wherein the first direction D1 is, for example, substantially parallel to the light incident surface 116 and the second surface 114, and the second direction is, for example, substantially perpendicular to the first One direction D1 is substantially perpendicular to the light incident surface 116. The first strip-shaped optical structure 140 and the second strip-shaped optical structure 150 can achieve the effect of converging the divergence angle of the illumination light 122.
在本實施例中，光源模組100更包括至少一光學膜片(在圖1A至圖1C中是以一光學膜片160與一光學膜片170為例)，配置於第一表面112上。具體而言，此至少一光學膜片例如為稜鏡片、擴散片或其組合。舉例而言，在本實施例中，光學膜片160例如為稜鏡片，而光學膜片170例如為擴散片。此外，在本實施例中，光學膜片160的複數個稜鏡柱162例如是沿著第二方向D2排列，且每一稜鏡柱162沿著第一方向D1延伸。然而，在另一實施例中，光源模組100亦可採用光學膜片160，但不採用光學膜片170。或者，光源模組100亦可採用光學膜片170，但不採用光學膜片160。在本實施例中，光學膜片160配置於第一表面112與光學膜片170之間。In this embodiment, the light source module 100 further includes at least one optical film (for example, an optical film 160 and an optical film 170 in FIGS. 1A to 1C ) disposed on the first surface 112 . In particular, the at least one optical film is, for example, a crepe sheet, a diffusion sheet or a combination thereof. For example, in the present embodiment, the optical film 160 is, for example, a cymbal, and the optical film 170 is, for example, a diffusion sheet. Further, in the present embodiment, the plurality of masts 162 of the optical film 160 are aligned, for example, along the second direction D2, and each of the masts 162 extends along the first direction D1. However, in another embodiment, the light source module 100 can also use the optical film 160, but does not use the optical film 170. Alternatively, the light source module 100 may also use the optical film 170, but the optical film 160 is not used. In the present embodiment, the optical film 160 is disposed between the first surface 112 and the optical film 170.
在本實施例之光源模組100中，由於相鄰二第一條狀光學結構140之間設有至少一第二條狀光學結構150，且每一第一條狀光學結構140在垂直於第二表面114的方向上的高度H1不等於每一第二條狀光學結構150在垂直於第二表面114的方向上的高度H2，因此當導光板110的第一表面112上方配置有光學膜片(如光學膜片160、170)時，便可藉由高度較高的條狀光學結構(如第一條狀光學結構140)來與光學膜片(本實施例中是以光學膜片160為例)接觸。如此一來，由於光學膜片160被高度較高的第一條狀光學結構140頂住而與第二條狀光學結構150保持間隙，因此可減少導光板110與光學膜片160的接觸面積，以減輕導光板110與光學膜片160之局部區域沾黏的現象，進而提升光源模組100所提供的面光源的均勻度。In the light source module 100 of the present embodiment, at least one second strip-shaped optical structure 150 is disposed between two adjacent first strip-shaped optical structures 140, and each of the first strip-shaped optical structures 140 is perpendicular to the first The height H1 in the direction of the two surfaces 114 is not equal to the height H2 of each second strip-shaped optical structure 150 in the direction perpendicular to the second surface 114, and thus the optical film is disposed above the first surface 112 of the light guide plate 110. (For example, the optical film 160, 170), the optical film can be formed by a strip optical structure (such as the first strip optical structure 140) having a higher height (in this embodiment, the optical film 160 is used) Example) Contact. In this way, since the optical film 160 is held by the first strip optical structure 140 having a higher height to maintain a gap with the second strip optical structure 150, the contact area between the light guide plate 110 and the optical film 160 can be reduced. The phenomenon that the light guide plate 110 and the optical film 160 are adhered to each other is reduced, thereby improving the uniformity of the surface light source provided by the light source module 100.
此外，由於第一條狀光學結構140與第二條狀光學結構150是整合於導光板110的第一表面112，因此本實施例之光源模組100有助於減少光源模組100所使用的光學膜片的數量，進而可使光源模組100的整體厚度有效減少。In addition, since the first strip-shaped optical structure 140 and the second strip-shaped optical structure 150 are integrated on the first surface 112 of the light guide plate 110, the light source module 100 of the embodiment helps reduce the use of the light source module 100. The number of optical films, in turn, can effectively reduce the overall thickness of the light source module 100.
在本實施例中，每一第一條狀光學結構140具有一指向遠離第二表面114的方向之第一頂角142，每一第二條狀光學結構150具有一指向遠離第二表面114的方向之第二頂角152，其中第一頂角142可為圓角或尖角，且第二頂角152可為圓角或尖角(圖示第一頂角142與第二頂角152均為圓角，但本發明不以此為限，第一頂角142與第二頂角152可為分別為圓角與尖角之其一)。圓角可使照明光122擴散，進而提升面光源的均勻度。此外圓角亦可降低第一條狀光學結構140與光學膜片160彼此因互相接觸而產生的磨損的程度。In the present embodiment, each of the first strip-shaped optical structures 140 has a first apex angle 142 pointing away from the second surface 114, and each of the second strip-shaped optical structures 150 has a direction away from the second surface 114. The second apex angle 152 of the direction, wherein the first apex angle 142 can be a rounded corner or a sharp corner, and the second apex angle 152 can be a rounded corner or a sharp corner (the first apex angle 142 and the second apex angle 152 are illustrated It is a rounded corner, but the invention is not limited thereto, and the first apex angle 142 and the second apex angle 152 may be one of a rounded corner and a sharp corner, respectively. The rounded corners allow the illumination light 122 to diffuse, thereby increasing the uniformity of the surface source. In addition, the rounded corners can also reduce the degree of wear of the first strip-shaped optical structure 140 and the optical strip 160 due to mutual contact with each other.
在本實施例中，光學膜片160的厚度小於等於0.215mm，相鄰二第一條狀光學結構140之間設有N個第二條狀光學結構150，其中3≦N≦6，且N為正整數。當N值落在上述範圍內時，第一條狀光學結構140的數量不會過多，因而第一條狀光學結構140可以降低導光板110與光學膜片160的接觸面積，降低光學膜片160與導光板110局部沾黏的機會，進而提升光源模組100所提供的面光源的均勻度。另一方面，當N值落在上述範圍內時，第一條狀光學結構140的數量不會過少，因而光學膜片160可以較為平整地被第一條狀光學結構140頂住，而較不會因第一條狀光學結構140的數量過少，間隙過大而使光學膜片160翹曲而碰觸第二條狀光學結構150。如此一來，可有效降低光學膜片160與導光板110局部沾黏的機會。In this embodiment, the thickness of the optical film 160 is less than or equal to 0.215 mm, and N second strip-shaped optical structures 150 are disposed between adjacent two first strip-shaped optical structures 140, wherein 3≦N≦6, and N Is a positive integer. When the N value falls within the above range, the number of the first strip-shaped optical structures 140 is not excessive, and thus the first strip-shaped optical structure 140 can reduce the contact area of the light guide plate 110 and the optical film 160, and reduce the optical film 160. The opportunity to partially adhere to the light guide plate 110 further enhances the uniformity of the surface light source provided by the light source module 100. On the other hand, when the value of N falls within the above range, the number of the first strip-shaped optical structures 140 is not too small, so that the optical film 160 can be relatively flatly held by the first strip-shaped optical structure 140, and less The optical film 160 may be warped to contact the second strip-shaped optical structure 150 because the number of the first strip-shaped optical structures 140 is too small and the gap is too large. In this way, the chance of the optical film 160 being partially adhered to the light guide plate 110 can be effectively reduced.
圖2為本發明之另一實施例之光源模組的局部剖面示意圖。請參照圖2，本實施例之光源模組100a與圖1B之光源模組100類似，而兩者的差異如下所述。在本實施例之光源模組100a中，導光板110a的第一條狀光學結構140a具有圓柱面144a，且導光板110a的第二條狀光學結構150a具有圓柱面154a。舉例而言，第一條狀光學結構140a與第二條狀光學結構150a例如各為半圓柱或圓柱的一部分。如此之第一條狀光學結構140a與第二條狀光學結構150a可增加照明光122的擴散程度，進而提升面光源的均勻度。本發明不以此為限，第一條狀光學結構140a與第二條狀光學結構150a可以分別為半圓柱狀與三角柱狀之其一。2 is a partial cross-sectional view showing a light source module according to another embodiment of the present invention. Referring to FIG. 2, the light source module 100a of the present embodiment is similar to the light source module 100 of FIG. 1B, and the difference between the two is as follows. In the light source module 100a of the present embodiment, the first strip-shaped optical structure 140a of the light guide plate 110a has a cylindrical surface 144a, and the second strip-shaped optical structure 150a of the light guide plate 110a has a cylindrical surface 154a. For example, the first strip-shaped optical structure 140a and the second strip-shaped optical structure 150a are each, for example, a semi-cylindrical or a part of a cylinder. Such a first strip-shaped optical structure 140a and a second strip-shaped optical structure 150a can increase the degree of diffusion of the illumination light 122, thereby improving the uniformity of the surface light source. The invention is not limited thereto, and the first strip-shaped optical structure 140a and the second strip-shaped optical structure 150a may be one of a semi-cylindrical shape and a triangular column shape, respectively.
圖3為本發明之又一實施例之光源模組的局部剖面示意圖。請參照圖3，本實施例之光源模組100b與圖1B之光源模組100a類似，而兩者的差異如下所述。在本實施例之光源模組100b中，導光板110b的第一條狀光學結構140b的第一頂角142b為尖角，且導光板110b的第二條狀光學結構150b的第二頂角152b為尖角，但本發明不以此為限，第一頂角142b與第二頂角152b可為分別為圓角與尖角之其一。3 is a partial cross-sectional view showing a light source module according to still another embodiment of the present invention. Referring to FIG. 3, the light source module 100b of the present embodiment is similar to the light source module 100a of FIG. 1B, and the difference between the two is as follows. In the light source module 100b of the embodiment, the first top corner 142b of the first strip-shaped optical structure 140b of the light guide plate 110b is a sharp corner, and the second top corner 152b of the second strip-shaped optical structure 150b of the light guide plate 110b It is a sharp corner, but the invention is not limited thereto, and the first corner angle 142b and the second corner angle 152b may be one of rounded corners and sharp corners, respectively.
圖4為本發明之再一實施例之光源模組中的導光板110c的局部立體圖，而圖5A至圖5D分別繪示圖4中的第一條狀光學結構140c從各個不同方向來看的示意圖。請參照圖4及圖5A至圖5D，本實施例之光源模組與圖1A至圖1C之光源模組100類似，而兩者的差異在於導光板。本實施例之導光板110c與圖1A至圖1C之導光板110類似，而兩者的差異如下所述。在本實施例之導光板110c中，沿著第一方向D1上排列之相鄰二第一條狀光學結構140c之間設有至少一第二條狀光學結構150c(圖4中是以一個第二條狀光學結構150c為例，但在其他實施例中亦可以是複數個)，且沿著第二方向D2上排列之相鄰二第一條狀光學結構140c之間設有至少一第二條狀光學結構150c(圖4中是以一個第二條狀光學結構150c為例，但在其他實施例中亦可以是複數個)。圖5A至圖5D中的第一條狀光學結構140c的觀看方向可參照圖中的第一方向D1與第二方向D2所標明的方向，而第二條狀光學結構150c類似圖5A至圖5D所示的第一條狀光學結構140c，但第一條狀光學結構140c的高度與第二條狀光學結構150c的高度不同。4 is a partial perspective view of a light guide plate 110c in a light source module according to still another embodiment of the present invention, and FIGS. 5A to 5D respectively illustrate the first strip-shaped optical structure 140c of FIG. 4 viewed from different directions. schematic diagram. Referring to FIG. 4 and FIG. 5A to FIG. 5D , the light source module of the embodiment is similar to the light source module 100 of FIGS. 1A to 1C , and the difference between the two is the light guide plate. The light guide plate 110c of the present embodiment is similar to the light guide plate 110 of FIGS. 1A to 1C, and the difference between the two is as follows. In the light guide plate 110c of the embodiment, at least one second strip-shaped optical structure 150c is disposed between adjacent two first strip-shaped optical structures 140c arranged along the first direction D1 (in FIG. 4 is a first The two strip-shaped optical structures 150c are exemplified, but in other embodiments may be plural, and at least one second is disposed between adjacent two first strip-shaped optical structures 140c arranged along the second direction D2. The strip-shaped optical structure 150c (in FIG. 4, a second strip-shaped optical structure 150c is taken as an example, but in other embodiments, it may be plural). The viewing direction of the first strip-shaped optical structure 140c in FIGS. 5A to 5D may refer to the directions indicated by the first direction D1 and the second direction D2 in the drawing, and the second strip-shaped optical structure 150c is similar to FIG. 5A to FIG. 5D. The first strip-shaped optical structure 140c is shown, but the height of the first strip-shaped optical structure 140c is different from the height of the second strip-shaped optical structure 150c.
在本實施例中，每一第一條狀光學結構140c具有一第一端面141c、一第二端面143c、一第一條狀稜面145c及一第二條狀稜面147c。第一端面141c相對於第二表面114傾斜。第二端面143c相對於第一端面141c，且相對於第二表面114傾斜。第一條狀稜面145c連接第一端面141c與第二端面143c，且相對於第二表面114傾斜。第二條狀稜面147c連接第一端面141c與第二端面143c，且相對於第二表面114傾斜，其中第一條狀稜面145c的傾斜方向不同於第二條狀稜面147c的傾斜方向。在本實施例中，第一端面141c的傾斜方向不同於第二端面143c的傾斜方向。此外，類似第一條狀光學結構140c，每一第二條狀光學結構150c具有一第三端面151c、一第四端面153c、一第三條狀稜面155c及一第四條狀稜面157c。第三端面151c相對於第二表面114傾斜。第四端面153c相對於第三端面151c，且相對於第二表面114傾斜。第三條狀稜面155c連接第三端面151c與第四端面153c，且相對於第二表面114傾斜。第四條狀稜面157c連接第三端面151c與第四端面153c，且相對於第二表面114傾斜，其中第三條狀稜面155c的傾斜方向不同於第四條狀稜面157c的傾斜方向。在本實施例中，第三端面151c的傾斜方向不同於第四端面153c的傾斜方向。In this embodiment, each of the first strip-shaped optical structures 140c has a first end surface 141c, a second end surface 143c, a first strip-shaped prism surface 145c, and a second strip-shaped prism surface 147c. The first end surface 141c is inclined with respect to the second surface 114. The second end surface 143c is inclined with respect to the first end surface 141c with respect to the second surface 114. The first one-sided facet 145c connects the first end face 141c and the second end face 143c, and is inclined with respect to the second surface 114. The second strip surface 147c connects the first end surface 141c and the second end surface 143c and is inclined with respect to the second surface 114, wherein the oblique direction of the first strip surface 145c is different from the tilt direction of the second strip surface 147c . In the present embodiment, the inclination direction of the first end surface 141c is different from the inclination direction of the second end surface 143c. In addition, similar to the first strip-shaped optical structure 140c, each of the second strip-shaped optical structures 150c has a third end surface 151c, a fourth end surface 153c, a third strip-shaped prism surface 155c, and a fourth strip-shaped prism surface 157c. . The third end surface 151c is inclined with respect to the second surface 114. The fourth end surface 153c is inclined with respect to the third end surface 151c with respect to the second surface 114. The third strip surface 155c connects the third end surface 151c and the fourth end surface 153c and is inclined with respect to the second surface 114. The fourth strip surface 157c connects the third end surface 151c and the fourth end surface 153c and is inclined with respect to the second surface 114, wherein the oblique direction of the third strip surface 155c is different from the tilt direction of the fourth strip surface 157c . In the present embodiment, the inclination direction of the third end surface 151c is different from the inclination direction of the fourth end surface 153c.
在本實施例中，每一第一條狀光學結構140c的延伸方向實質上平行於每一第二條狀光學結構150c的延伸方向。此外，每一第一條狀光學結構140c在垂直於第二表面114的方向上的高度大於每一第二條狀光學結構150c在垂直於第二表面114的方向上的高度。In this embodiment, the extending direction of each of the first strip-shaped optical structures 140c is substantially parallel to the extending direction of each of the second strip-shaped optical structures 150c. Moreover, the height of each of the first strip-shaped optical structures 140c in a direction perpendicular to the second surface 114 is greater than the height of each of the second strip-shaped optical structures 150c in a direction perpendicular to the second surface 114.
在本實施例中，由於在第一方向D1與第二方向D2上皆有第二條狀光學結構150c穿插於第一條狀光學結構140c之間，因此導光板110c上方的光學膜片被第一條狀光學結構140c支撐的位置可以更為均勻分散，以提升光學膜片的平整度，進而提升光源模組所提供的面光源的均勻度。In this embodiment, since the second strip-shaped optical structure 150c is interposed between the first strip-shaped optical structures 140c in the first direction D1 and the second direction D2, the optical film above the light guide plate 110c is The position supported by the strip-shaped optical structure 140c can be more evenly dispersed to improve the flatness of the optical film, thereby improving the uniformity of the surface light source provided by the light source module.
在其他實施例中，沿著第一方向D1上排列之相鄰二第一條狀光學結構140c之間設有M個第二條狀光學結構150c，且沿著第二方向D2上排列之相鄰二第一條狀光學結構140c之間設有N個第二條狀光學結構150c，其中3≦M≦6，3≦N≦6，且M與N皆為正整數。In other embodiments, M second strip-shaped optical structures 150c are disposed between adjacent two first strip-shaped optical structures 140c arranged along the first direction D1, and the phases are arranged along the second direction D2. N second strip-shaped optical structures 150c are disposed between the adjacent first strip-shaped optical structures 140c, wherein 3≦M≦6, 3≦N≦6, and M and N are positive integers.
上述實施例之光源模組可作為液晶顯示器的背光模組，或作為室內或室外的照明燈具，端視使用需求而定。The light source module of the above embodiment can be used as a backlight module of a liquid crystal display, or as an indoor or outdoor lighting fixture, depending on the needs of use.
綜上所述，在本發明之實施例之光源模組中，由於相鄰二第一條狀光學結構之間設有至少一第二條狀光學結構，且每一第一條狀光學結構在垂直於第二表面的方向上的高度不等於每一第二條狀光學結構在垂直於第二表面的方向上的高度，因此當導光板的第一表面上方配置有光學膜片時，便可藉由高度較高的條狀光學結構來與光學膜片接觸。如此一來，便可減少導光板與光學膜片的接觸面積，以減輕導光板與光學膜片之局部區域沾黏的現象，進而提升光源模組所提供的面光源的均勻度。此外，由於第一條狀光學結構與第二條狀光學結構是整合於導光板的第一表面上，因此本發明之實施例之光源模組有助於減少光源模組所使用的光學膜片的數量，進而可使光源模組的整體厚度有效減少。In summary, in the light source module of the embodiment of the present invention, at least one second strip-shaped optical structure is disposed between two adjacent first strip-shaped optical structures, and each of the first strip-shaped optical structures is The height in a direction perpendicular to the second surface is not equal to the height of each second strip-shaped optical structure in a direction perpendicular to the second surface, so when an optical film is disposed above the first surface of the light guide plate, The optical film is contacted by a highly high strip optical structure. In this way, the contact area between the light guide plate and the optical film can be reduced to reduce the adhesion of the light guide plate and the local area of the optical film, thereby improving the uniformity of the surface light source provided by the light source module. In addition, since the first strip-shaped optical structure and the second strip-shaped optical structure are integrated on the first surface of the light guide plate, the light source module of the embodiment of the invention helps to reduce the optical film used by the light source module. The number, in turn, can effectively reduce the overall thickness of the light source module.
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。另外本發明的任一實施例或申請專利範圍不須達成本發明所揭露之全部目的或優點或特點。此外，摘要部分和標題僅是用來輔助專利文件搜尋之用，並非用來限制本發明之權利範圍。本說明書或申請專利範圍中提及的“第一”、“第二”等用語僅用以命名元件的名稱或區別不同實施例或範圍，而並非用來限制元件數量上的上限或下限。The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention. The terms "first", "second", and the like, which are used in the specification or the claims, are used to refer to the names of the elements or to distinguish different embodiments or ranges, and are not intended to limit the upper or lower limit of the number of elements.
100、100a、100b．．．光源模組100, 100a, 100b. . . Light source module
110、110a、110b、110c．．．導光板110, 110a, 110b, 110c. . . Light guide
112．．．第一表面112. . . First surface
114．．．第二表面114. . . Second surface
115．．．光學微結構115. . . Optical microstructure
116．．．入光面116. . . Glossy surface
120．．．發光元件120. . . Light-emitting element
122．．．照明光122. . . Illumination light
130．．．反射元件130. . . Reflective element
140、140a、140b、140c．．．第一條狀光學結構140, 140a, 140b, 140c. . . First strip optical structure
141c．．．第一端面141c. . . First end face
142、142b．．．第一頂角142, 142b. . . First corner
143c．．．第二端面143c. . . Second end face
144a、154a．．．圓柱面144a, 154a. . . Cylindrical surface
145c．．．第一條狀稜面145c. . . First lobe
147c．．．第二條狀稜面147c. . . Second strip facet
150、150a、150b、150c．．．第二條狀光學結構150, 150a, 150b, 150c. . . Second strip optical structure
151c．．．第三端面151c. . . Third end
152、152b．．．第二頂角152, 152b. . . Second top angle
153c．．．第四端面153c. . . Fourth end
155c．．．第三條狀稜面155c. . . Third strip facet
157c．．．第四條狀稜面157c. . . Fourth strip facet
160、170．．．光學膜片160, 170. . . Optical diaphragm
D1．．．第一方向D1. . . First direction
D2．．．第二方向D2. . . Second direction
H1．．．高度H1. . . height
H2．．．高度H2. . . height
圖1A為本發明之一實施例之光源模組的立體示意圖。1A is a perspective view of a light source module according to an embodiment of the present invention.
圖1B為圖1A之光源模組沿著I-I線的局部剖面示意圖。1B is a partial cross-sectional view of the light source module of FIG. 1A taken along line I-I.
圖1C為圖1A之光源模組沿著II-II線的局部剖面示意圖。1C is a partial cross-sectional view of the light source module of FIG. 1A taken along line II-II.
圖2為本發明之另一實施例之光源模組的局部剖面示意圖。2 is a partial cross-sectional view showing a light source module according to another embodiment of the present invention.
圖3為本發明之又一實施例之光源模組的局部剖面示意圖。3 is a partial cross-sectional view showing a light source module according to still another embodiment of the present invention.
圖4為本發明之再一實施例之光源模組中的導光板的局部立體圖。4 is a partial perspective view of a light guide plate in a light source module according to still another embodiment of the present invention.
圖5A至圖5D分別繪示圖4中的第一條狀光學結構從各個不同方向來看的示意圖。5A to 5D are schematic views respectively showing the first strip-shaped optical structure of FIG. 4 as seen from different directions.
100．．．光源模組100. . . Light source module
110．．．導光板110. . . Light guide
112．．．第一表面112. . . First surface
114．．．第二表面114. . . Second surface
116．．．入光面116. . . Glossy surface
120．．．發光元件120. . . Light-emitting element
130．．．反射元件130. . . Reflective element
140．．．第一條狀光學結構140. . . First strip optical structure
150．．．第二條狀光學結構150. . . Second strip optical structure
160、170．．．光學膜片160, 170. . . Optical diaphragm
D1．．．第一方向D1. . . First direction
D2．．．第二方向D2. . . Second direction
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| KR102324866B1 (en) | 2015-05-26 | 2021-11-12 | 엘지디스플레이 주식회사 | Back Light Unit, Liquid Crystal Display Device and Driving Method thereof |
| CN106996544B (en) | 2016-01-26 | 2019-09-06 | 瑞仪光电(苏州)有限公司 | Prismatic lens, backlight module |
| CN108020880A (en) * | 2017-11-03 | 2018-05-11 | 深圳市德仓科技有限公司 | Light guide plate and backlight module |
| CN112859435A (en) * | 2021-01-12 | 2021-05-28 | 扬昕科技(苏州)有限公司 | Light guide plate and light source module |
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| US6312303B1 (en) * | 1999-07-19 | 2001-11-06 | Si Diamond Technology, Inc. | Alignment of carbon nanotubes |
| TW200819855A (en) * | 2006-10-18 | 2008-05-01 | Gamma Optical Co Ltd | backlight module |
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| KR20080085242A (en) * | 2007-03-19 | 2008-09-24 | 삼성전자주식회사 | Light guide plate and blacklight assembly using the same |
| JP2010004035A (en) * | 2008-05-22 | 2010-01-07 | Mitsubishi Chemicals Corp | Semiconductor light-emitting apparatus, illuminator, and image display apparatus |
| JP2010027725A (en) * | 2008-07-16 | 2010-02-04 | Toshiba Corp | Light emitting device of package type, and backlight unit, liquid crystal display unit and lighting unit using the same |
| US8038329B2 (en) * | 2009-02-04 | 2011-10-18 | Panasonic Corporation | Bulb-shaped lamp and lighting device |
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| TW200819855A (en) * | 2006-10-18 | 2008-05-01 | Gamma Optical Co Ltd | backlight module |
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