TW201500817A - Curved back light module - Google Patents
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Abstract
Description
本發明係關於一種背光模組，且特別是關於一種曲型背光模組。The present invention relates to a backlight module, and more particularly to a curved backlight module.
現有之利用液晶面板作為顯像核心的顯示裝置，皆需具備背光模組，背光模組會產生面光源以供液晶面板顯像之用。一般而言，顯示裝置及其背光模組為平面型，但為了因應特定場合的需求，例如展示用或遊藝用的情況，顯示裝置會設計為曲型，相應的，曲型液晶面板則需具備曲型背光模組，以便能產生均勻的面光源。The existing display device using the liquid crystal panel as the imaging core needs to have a backlight module, and the backlight module generates a surface light source for the liquid crystal panel to be used for image display. In general, the display device and its backlight module are planar, but in order to meet the needs of specific occasions, such as display or game, the display device will be designed as a curved type, and correspondingly, the curved liquid crystal panel needs to have Curved backlight module to produce a uniform surface light source.
請參照第1圖，第1圖為習知曲型背光模組的截面示意圖，曲型背光模組100包括導光板（Light Guide Plate，LGP）110、光源121、第二光源122、擴散片（Diffuser）140、反射片（Reflector）150與稜鏡片（Prism Sheet）160。其中光源121與第二光源122為使用發光二極體作為發光單元的發光組件，此發光組件具有發光面，此發光面毗鄰導光板110側邊的入光面。光源121與第二光源122所產生的光線會由兩側入光面進入導光板110，並經過導光板110、擴散片140、反射片150與稜鏡片160的作用，光線會反覆進行折射與反射以便擴散，經擴散的光線L會透過稜鏡片射出，射出的光線L會再進入曲型液晶面板（未繪示），液晶面板會利用液晶分子和彩色濾光片等元件的作用而呈現影像。其中，光線L會在任意點射出並且射出時的方向係以該點之切平面的法線方向為主，然而，由於曲型背光模組100為曲型結構的關係，而觀看者180的肉眼所見者可虛擬為一視覺平面VP（在第1圖中為圖上方所示的水平觀察面），就觀看者180所見，經擴散的光線L相對於觀看者180並非準直光，因此曲型顯示裝置所呈現的影像會是亮度不均勻的狀態，即此曲型顯示裝置的中央會顯得相對較亮（因射出之光線會直入眼睛），而兩邊卻顯得相對較暗。由此觀之，習知的曲型背光模組並未揭露更進一步的解決方案。Please refer to FIG. 1 . FIG. 1 is a schematic cross-sectional view of a conventional curved backlight module. The curved backlight module 100 includes a light guide plate (LGP) 110 , a light source 121 , a second light source 122 , and a diffusion sheet ( Diffuser 140, Reflector 150 and Prism Sheet 160. The light source 121 and the second light source 122 are light-emitting components using the light-emitting diode as the light-emitting unit, and the light-emitting component has a light-emitting surface adjacent to the light-incident surface of the side of the light guide plate 110. The light generated by the light source 121 and the second light source 122 enters the light guide plate 110 from the light incident surfaces on both sides, and passes through the light guide plate 110, the diffusion sheet 140, the reflection sheet 150 and the cymbal sheet 160, and the light is repeatedly refracted and reflected. In order to diffuse, the diffused light L will be emitted through the cymbal, and the emitted light L will enter the curved liquid crystal panel (not shown), and the liquid crystal panel will display images by using elements such as liquid crystal molecules and color filters. Wherein, the light L is emitted at an arbitrary point and the direction when the light is emitted is mainly the normal direction of the tangent plane of the point, however, since the curved backlight module 100 has a curved structure relationship, the naked eye of the viewer 180 The viewer can be virtualized as a visual plane VP (the horizontal viewing plane shown in the upper part of the figure in Fig. 1). As seen by the viewer 180, the diffused light L is not collimated with respect to the viewer 180, so the curved shape The image presented by the display device may be in a state of uneven brightness, that is, the center of the curved display device may appear relatively bright (because the emitted light will go straight into the eye), while the two sides appear relatively dark. From this point of view, the conventional curved backlight module does not disclose a further solution.
有鑑於現有技術的不足，本發明的目的在提出一種應用於顯示裝置的曲型背光模組，以期能解決顯示裝置所呈現的影像亮度不均勻的問題。In view of the deficiencies of the prior art, the object of the present invention is to provide a curved backlight module applied to a display device, in order to solve the problem of uneven brightness of the image presented by the display device.
為達到上述目的，本發明提出一種曲型背光模組，其係用於顯示裝置中，該曲型背光模組包括導光板、光源與複數導光結構。導光板具有出光面、反射面與入光面，出光面與反射面互相對立設置，入光面夾於出光面與反射面之間且位於導光板的側邊，其中，出光面與反射面為曲面。光源面對入光面設置。該些導光結構分佈於導光板之一側且鄰接反射面，其中，導光結構具有導光面，導光面與反射面夾有一傾斜角，反射面的切平面與水平面夾有一夾角，傾斜角之角度係對應於夾角之角度。In order to achieve the above object, the present invention provides a curved backlight module for use in a display device. The curved backlight module includes a light guide plate, a light source, and a plurality of light guiding structures. The light guide plate has a light emitting surface, a reflecting surface and a light incident surface, and the light emitting surface and the reflecting surface are opposite to each other, and the light incident surface is sandwiched between the light emitting surface and the reflecting surface and located at a side of the light guiding plate, wherein the light emitting surface and the reflecting surface are Surface. The light source is placed facing the light entrance surface. The light guiding structures are disposed on one side of the light guide plate and adjacent to the reflecting surface, wherein the light guiding structure has a light guiding surface, and the light guiding surface and the reflecting surface have an inclined angle, and the cutting plane of the reflecting surface has an angle with the horizontal plane, and the inclined The angle of the angle corresponds to the angle of the included angle.
本發明所提出的一種曲型背光模組，改善了顯示裝置所呈現的影像亮度不均勻的問題，使出光方向更具集中性，並提高了出光效率，同時還可減少光學膜片的使用。The curved backlight module provided by the invention improves the problem of uneven brightness of the image displayed by the display device, makes the light-emitting direction more concentrated, improves the light-emitting efficiency, and reduces the use of the optical film.
為讓本發明之目的、特徵和優點能使該領域具有通常知識者更易理解，下文舉一較佳實施例，並配合所附圖式，作詳細說明如下。In order to make the objects, features, and advantages of the present invention more readily understood by those of ordinary skill in the art, the following description of the preferred embodiments and the accompanying drawings.
<先前技術>
100‧‧‧曲型背光模組
110‧‧‧導光板
121‧‧‧光源
122‧‧‧第二光源
140‧‧‧擴散片
150‧‧‧反射片
160‧‧‧稜鏡片
180‧‧‧觀看者
VP‧‧‧視覺平面
L‧‧‧光線
<本發明>
200、400、500、600‧‧‧曲型背光模組
210、410、510、610‧‧‧導光板
211‧‧‧出光面
212‧‧‧反射面
213‧‧‧入光面
221、421、521、621‧‧‧光源
222、422、522、622‧‧‧第二光源
230、330、430、530、630‧‧‧導光結構
231、331‧‧‧導光面
232、332‧‧‧斜面
233、333‧‧‧側面
240、440、541、542、640‧‧‧擴散片
250、450、650‧‧‧反射片
660‧‧‧稜鏡片
VP‧‧‧視覺平面
L‧‧‧光線
x1、x2、θ‧‧‧角度<Prior technology>
100‧‧‧ Curved backlight module
110‧‧‧Light guide plate
121‧‧‧Light source
122‧‧‧second light source
140‧‧‧Diffuser
150‧‧‧reflector
160‧‧‧ Picture
180‧‧‧ Viewers
VP‧‧ visual plane
L‧‧‧Light
<present invention>
200, 400, 500, 600‧‧‧ curved backlight module
210, 410, 510, 610‧‧ ‧ light guide plate
211‧‧‧Glossy
212‧‧‧reflecting surface
213‧‧‧Into the glossy surface
221, 421, 521, 621‧‧ ‧ light source
222, 422, 522, 622‧‧‧ second light source
230, 330, 430, 530, 630‧‧ ‧ light guiding structure
231, 331‧‧ ‧ light guide
232, 332‧‧‧ bevel
233, 333‧‧‧ side
240, 440, 541, 542, 640‧‧‧ diffuser
250, 450, 650‧‧‧ reflection film
660‧‧‧ Picture
VP‧‧ visual plane
L‧‧‧Light
x 1 , x 2 , θ‧‧‧ angle
第1圖係習知曲型背光模組的截面示意圖。
第2圖係本發明一較佳實施例之曲型背光模組的截面示意圖。
第3圖係本發明一較佳實施例之曲型背光模組的局部放大圖。
第4圖係本發明一較佳實施例之導光結構的示意圖。
第5圖係本發明另一較佳實施例之導光結構的示意圖。
第6圖係本發明一較佳實施例之導光結構分佈狀態的示意圖。
第7圖係本發明一較佳實施例之角度θ與角度x1
的關係曲線圖。
第8圖係本發明第二較佳實施例之曲型背光模組的截面示意圖。
第9圖係本發明第三較佳實施例之曲型背光模組的截面示意圖。
第10圖係本發明第四較佳實施例之曲型背光模組的截面示意圖。
Figure 1 is a schematic cross-sectional view of a conventional curved backlight module.
2 is a schematic cross-sectional view of a curved backlight module in accordance with a preferred embodiment of the present invention.
Figure 3 is a partially enlarged view of a curved backlight module in accordance with a preferred embodiment of the present invention.
Figure 4 is a schematic illustration of a light directing structure in accordance with a preferred embodiment of the present invention.
Figure 5 is a schematic illustration of a light guiding structure in accordance with another preferred embodiment of the present invention.
Figure 6 is a schematic view showing the distribution state of the light guiding structure of a preferred embodiment of the present invention.
Figure 7 is a graph showing the relationship between the angle θ and the angle x 1 in a preferred embodiment of the present invention.
Figure 8 is a cross-sectional view showing a curved backlight module of a second preferred embodiment of the present invention.
Figure 9 is a cross-sectional view showing a curved backlight module of a third preferred embodiment of the present invention.
Figure 10 is a cross-sectional view showing a curved backlight module of a fourth preferred embodiment of the present invention.
請參照第2圖，第2圖為本發明一較佳實施例之曲型背光模組的截面示意圖。曲型背光模組200係用於曲型的顯示裝置（未繪示）中，曲型背光模組200包括導光板210、光源221、第二光源222、複數導光結構230、擴散片240與反射片250。光源221設置於導光板210的一側邊，而第二光源222設置於導光板210的另一側邊，且第二光源222與光源221相對設置。其中導光結構230於第2圖中的大小係為了便於示意之故而稍微放大。Please refer to FIG. 2 , which is a cross-sectional view of a curved backlight module according to a preferred embodiment of the present invention. The curved backlight module 200 is used in a curved display device (not shown). The curved backlight module 200 includes a light guide plate 210, a light source 221, a second light source 222, a plurality of light guiding structures 230, and a diffusion sheet 240. Reflecting sheet 250. The light source 221 is disposed on one side of the light guide plate 210 , and the second light source 222 is disposed on the other side of the light guide plate 210 , and the second light source 222 is disposed opposite to the light source 221 . The size of the light guiding structure 230 in FIG. 2 is slightly enlarged for convenience of illustration.
請再同時參照第3圖與第4圖，第3圖為本發明一較佳實施例之曲型背光模組的局部放大圖，其係第2圖左、右兩側的局部放大；第4圖為本發明一較佳實施例之導光結構的示意圖，其移除了其他元件僅保留導光結構以便於說明。導光板210具有出光面211、反射面212與入光面213，出光面211與反射面212互相對立設置，入光面213夾於出光面211與反射面212之間且位於導光板210的側邊，其中，出光面211與反射面212為曲面，且如第2圖所示，曲型背光模組200係中央向上、兩側向下的曲型結構。在本實施例中，入光面213位於導光板210的兩側邊，光源221與第二光源222分別面對入光面213設置。其中，光源221與第二光源222為使用發光二極體（但不以此為限）作為發光單元的發光組件，複數個發光二極體排列成行，該些發光二極體分別具有發光面，該些發光面毗鄰入光面213。Please refer to FIG. 3 and FIG. 4 at the same time. FIG. 3 is a partial enlarged view of a curved backlight module according to a preferred embodiment of the present invention, which is partially enlarged on the left and right sides of FIG. 2; The figure is a schematic illustration of a light directing structure in accordance with a preferred embodiment of the present invention, with the other components removed to retain only the light directing structure for ease of illustration. The light guide plate 210 has a light-emitting surface 211, a reflective surface 212, and a light-incident surface 213. The light-emitting surface 211 and the reflective surface 212 are disposed opposite to each other. The light-incident surface 213 is sandwiched between the light-emitting surface 211 and the reflective surface 212 and located on the side of the light guide plate 210. In the side, the light-emitting surface 211 and the reflection surface 212 are curved surfaces, and as shown in FIG. 2, the curved backlight module 200 is a curved structure with a central upward direction and a downward direction on both sides. In this embodiment, the light incident surface 213 is located on both sides of the light guide plate 210, and the light source 221 and the second light source 222 are respectively disposed facing the light incident surface 213. The light source 221 and the second light source 222 are light-emitting components using a light-emitting diode (but not limited thereto) as a light-emitting unit, and a plurality of light-emitting diodes are arranged in a row, and the light-emitting diodes respectively have light-emitting surfaces. The light emitting surfaces are adjacent to the light incident surface 213.
導光結構230分佈於導光板210之一側且鄰接反射面212，導光結構230為五面體結構。其中，導光結構230具有導光面231、斜面232與兩側面233，導光面231與反射面212夾有一傾斜角，傾斜角的角度為x 1 ，斜面232的一側連接反射面212而另一側連接導光面231，斜面232與反射面212夾有另一角度x 2 ，兩側面233互相對立且分別連接導光面231、斜面232與反射面212。反射面212與導光面231交界處的切平面與水平面夾有一夾角，該夾角的角度為θ，傾斜角之角度x 1 係對應於夾角之角度θ，亦即，當角度θ改變時，角度x 1 會對應改變，已達到較佳的光擴散效果。其主要原理在於，當光源221射出的光線進入導光板210中，配合於角度θ，光源221所射出的光線會以不同的入射角從反射面212穿出，而穿出的光線希望能藉由導光面231達到全反射目的，並使光線反射與折射後會朝向正上方（正對著視覺平面VP）射出，因此在不同的角度θ下會需要具有不同角度x 1 的導光面231，依據如此原理調整導光結構230，可達到如第2圖所示，穿過擴散片240之任意位置的光線L，皆為正對著視覺平面VP的方向射出。除此之外，角度x 2 為開模時方便進行拔模的角度，因此角度x 2 和角度θ無關，在本實施例中，角度x 2 維持定值80度。除此之外，曲型背光模組200可省略稜鏡片，減少生產成本。The light guiding structure 230 is distributed on one side of the light guide plate 210 and adjacent to the reflecting surface 212, and the light guiding structure 230 is a pentahedron structure. The light guiding structure 230 has a light guiding surface 231, a sloped surface 232 and two side surfaces 233. The light guiding surface 231 and the reflecting surface 212 have an inclined angle. The angle of the inclined angle is x 1 , and one side of the inclined surface 232 is connected with the reflecting surface 212. The other side is connected to the light guiding surface 231. The inclined surface 232 and the reflecting surface 212 are at another angle x 2 . The two side surfaces 233 are opposite to each other and are respectively connected to the light guiding surface 231, the inclined surface 232 and the reflecting surface 212. The tangent plane at the intersection of the reflecting surface 212 and the light guiding surface 231 has an angle with the horizontal plane, the angle of the angle is θ, and the angle x 1 of the tilt angle corresponds to the angle θ of the angle, that is, when the angle θ changes, the angle x 1 will change accordingly, and a better light diffusion effect has been achieved. The main principle is that when the light emitted by the light source 221 enters the light guide plate 210 and is matched with the angle θ, the light emitted by the light source 221 will pass through the reflective surface 212 at different incident angles, and the light that passes through is desired to be used. The light guiding surface 231 achieves the purpose of total reflection, and the light is reflected and refracted to be directly above (facing the visual plane VP), so that the light guiding surface 231 having different angles x 1 may be required at different angles θ. According to the principle of adjusting the light guiding structure 230, as shown in FIG. 2, the light L passing through any position of the diffusion sheet 240 is emitted in the direction facing the visual plane VP. In addition to this, the angle x 2 is an angle at which the draft is facilitated at the time of mold opening, and therefore the angle x 2 is independent of the angle θ, and in the present embodiment, the angle x 2 is maintained at a constant value of 80 degrees. In addition, the curved backlight module 200 can omit the cymbal and reduce the production cost.
在本實施例中，導光面231為梯形；在其他實施例中，導光面亦可為其他種幾何形狀。例如，請參照第5圖，第5圖係本發明另一較佳實施例之導光結構的示意圖，導光結構330同樣具有導光面331、斜面332與兩側面333，其中導光面331為矩形。In this embodiment, the light guiding surface 231 is trapezoidal; in other embodiments, the light guiding surface may be other geometric shapes. For example, please refer to FIG. 5, which is a schematic diagram of a light guiding structure according to another preferred embodiment of the present invention. The light guiding structure 330 also has a light guiding surface 331, a slope 332 and two side surfaces 333, wherein the light guiding surface 331 It is a rectangle.
回到第2圖至第4圖所示之曲型背光模組200的實施例，導光面231係朝向遠離反射面212、接近光源221與第二光源222的方向延伸。詳言之，以第2圖所示之方向來看，反射面212的切平面與水平面平行之處形成一分界線，即第3圖所示之反射面212的中央，其中，位於分界線左側與右側的導光結構230係彼此對稱設置，位於左側的導光面231係朝向遠離反射面212、接近分界線左側的光源221的方向延伸；位於右側的導光面231係朝向遠離反射面212、接近分界線右側的第二光源222的方向延伸。在其他實施例中，曲型背光模組亦可僅具有一側光源，該光源鄰接位於導光板一側的入光面，而導光結構則對應於該光源設置，亦即分佈於導光板上的導光結構的導光面，皆朝向遠離反射面、接近該光源的方向延伸。Returning to the embodiment of the curved backlight module 200 shown in FIGS. 2 to 4, the light guiding surface 231 extends away from the reflecting surface 212 and in the direction of the light source 221 and the second light source 222. In detail, in the direction shown in FIG. 2, the tangent plane of the reflecting surface 212 forms a boundary line parallel to the horizontal plane, that is, the center of the reflecting surface 212 shown in FIG. 3, wherein, on the left side of the dividing line The light guiding structure 230 on the right side is symmetrically disposed, and the light guiding surface 231 on the left side extends in a direction away from the reflecting surface 212 and the light source 221 on the left side of the boundary line; the light guiding surface 231 located on the right side faces away from the reflecting surface 212. The direction of the second light source 222 near the right side of the boundary line extends. In other embodiments, the curved backlight module may have only one side light source adjacent to the light incident surface on one side of the light guide plate, and the light guide structure is disposed corresponding to the light source, that is, distributed on the light guide plate. The light guiding surface of the light guiding structure extends away from the reflecting surface and in a direction close to the light source.
請再同時參照第6圖，第6圖係本發明一較佳實施例之導光結構分佈狀態的示意圖。導光結構230呈非規則性的分佈於導光板210上，並且，導光結構230愈接近光源221則分佈密度愈疏，愈遠離光源221則分佈密度愈密。需注意的是，第6圖僅繪示如其前段所述之位於分界線左側、靠近光源221的部份，而未繪示位於分界線右側、靠近第二光源222的部份，右側部份則是當導光結構230愈接近第二光源222分佈密度愈疏，愈遠離第二光源222則分佈密度愈密。換言之，以導光板210整體來看，愈靠近導光板210的中央則導光結構230的分佈愈密，愈靠近導光板210的兩側則導光結構230的分佈愈疏。藉由如此結構，可在光能量較高處降低反射率，相對的在光能量較低處提高反射率，最終使光線分佈更為均勻，提高光學品味。Please refer to FIG. 6 at the same time. FIG. 6 is a schematic diagram showing the distribution state of the light guiding structure according to a preferred embodiment of the present invention. The light guiding structure 230 is irregularly distributed on the light guide plate 210, and the closer the light guiding structure 230 is to the light source 221, the thinner the distribution density is, and the farther away from the light source 221, the denser the distribution density. It should be noted that FIG. 6 only shows the portion on the left side of the boundary line near the light source 221 as described in the preceding paragraph, and the portion on the right side of the boundary line near the second light source 222 is not shown, and the right part is When the light guide structure 230 is closer to the second light source 222, the distribution density is more and more, and the farther away from the second light source 222, the denser the distribution density. In other words, as the whole of the light guide plate 210 is viewed, the closer the light guide plate 210 is to the center of the light guide plate 210, the closer the distribution of the light guide structure 230 is. The closer to the both sides of the light guide plate 210, the less the distribution of the light guide structure 230 is. With such a structure, the reflectance can be lowered at a higher light energy, and the reflectance can be increased at a lower position of the light energy, thereby finally making the light distribution more uniform and improving the optical taste.
請參照第7圖，第7圖係本發明一較佳實施例之角度θ與角度x 1 的關係曲線圖，其係以第2圖、第3圖、第4圖與第6圖之曲型背光模組200為例，其為設計過程中，透過實驗所得之最佳化數值的關係曲線，並以此作為導光結構230之角度x 1 的設計。在本實施例中，導光板210的曲率為R180mm，導光板210具有入光面213的兩側的切平面與水平面的夾角角度θ為35度，導光板210的中央的切平面與水平面的夾角角度θ為0，且當角度θ為0時，傾斜角角度x 1 具有初始值，初始值為41度，但不限於此。其中當夾角角度θ由0開始遞增時，傾斜角角度x 1 由41度開始相應遞減。亦即，當導光結構230往光源221或第二光源222靠近時，角度x 1 會遞減，導光面231會逐漸向反射面212靠近。Please refer to FIG. 7. FIG. 7 is a graph showing the relationship between the angle θ and the angle x 1 according to a preferred embodiment of the present invention, which is a pattern of the second, third, fourth, and sixth figures. The backlight module 200 is taken as an example, and is a design curve of the optimized value obtained through the experiment during the design process, and is used as the design of the angle x 1 of the light guiding structure 230. In this embodiment, the curvature of the light guide plate 210 is R180 mm, and the angle θ between the tangent plane of the light guide plate 210 having the two sides of the light incident surface 213 and the horizontal plane is 35 degrees, and the angle between the tangent plane of the center of the light guide plate 210 and the horizontal plane is The angle θ is 0, and when the angle θ is 0, the inclination angle angle x 1 has an initial value, and the initial value is 41 degrees, but is not limited thereto. When the angle of inclination θ is increased from 0, the angle of inclination x 1 is correspondingly decremented from 41 degrees. That is, when the light guiding structure 230 approaches the light source 221 or the second light source 222, the angle x 1 decreases, and the light guiding surface 231 gradually approaches the reflecting surface 212.
觀察第7圖的曲線斜率，可知夾角角度θ可分為0到15度與25到30度的第一區間，以及15到25度與30到35度的第二區間，當夾角角度θ於第一區間遞增時，傾斜角角度x 1 係依據第一變化率遞減；當夾角角度θ於第二區間遞增時，傾斜角角度x 1 係依據第二變化率遞減。所述第一變化率為角度θ每增加5度則角度x 1 減少2度，所述第二變化率為角度θ每增加5度則角度x 1 減少1度。因此，如上述角度θ與角度x 1 的關係曲線可推導出下方所列之關係式：Observing the slope of the curve in Fig. 7, it can be seen that the angle θ can be divided into a first interval of 0 to 15 degrees and 25 to 30 degrees, and a second interval of 15 to 25 degrees and 30 to 35 degrees, when the angle θ is at the When an interval is incremented, the inclination angle x 1 is decremented according to the first rate of change; when the angle θ is increasing in the second interval, the angle of inclination x 1 is decreased according to the second rate of change. The first angle θ change rate every 5 degrees reduces the angle of 2 x 1 degree, angle θ of the second rate of change for every 5 degrees to reduce the angle of 1 x 1 degree. Therefore, the relationship between the angle θ and the angle x 1 can be derived from the relationship listed below:
x 1 (θ)=41-0.4θ…………0≦θ≦15 x 1 (θ)=41-0.4θ............0≦θ≦15
x 1 (θ)=x 1 (15)-0.2(θ-15)…15<θ≦25 x 1 (θ)= x 1 (15)-0.2(θ-15)...15<θ≦25
x 1 (θ)=x 1 (25)-0.4(θ-25)…25<θ≦30 x 1 (θ)= x 1 (25)-0.4(θ-25)...25<θ≦30
x 1 (θ)=x 1 (30)-0.2(θ-30)…30<θ≦35 x 1 (θ)= x 1 (30)-0.2(θ-30)...30<θ≦35
上述之關係曲線與關係式，係本發明一實施例的其中一種最佳化關係，但不限於此。其重點在於，角度θ與角度x 1 具有互相對應的關係，亦即導光面會隨著曲型背光模組的曲型結構的不同位置，根據該位置之切平面與水平面（視覺平面或觀察面）之間的夾角變化，而相應的改變導光面與導光板的反射面之間的夾角。下表為本發明實驗所得之角度θ與角度x 1 的關係表，其表示了角度θ與角度x 1 大致上的對應關係，但不限於此。The above relationship curve and relational expression are one of the optimization relationships of an embodiment of the present invention, but are not limited thereto. The focus is that the angle θ and the angle x 1 have a corresponding relationship, that is, the light guide surface will follow the different positions of the curved structure of the curved backlight module, according to the tangent plane and the horizontal plane of the position (visual plane or observation) The angle between the faces is changed, and the angle between the light guiding surface and the reflecting surface of the light guide plate is changed correspondingly. The following table is a table showing the relationship between the angle θ and the angle x 1 obtained by the experiment of the present invention, and shows the relationship between the angle θ and the angle x 1 substantially, but is not limited thereto.
角度θ與角度x 1 關係表Angle θ and angle x 1 relationship table
請參照第8圖，第8圖係本發明第二較佳實施例之曲型背光模組的截面示意圖。曲型背光模組400包括導光板410、光源421、第二光源422、複數導光結構430、擴散片440與反射片450，曲型背光模組400與曲型背光模組200的差異在於，曲型背光模組400係中央向下、兩側向上的曲型結構，導光結構430的導光面與反射面的夾角亦同樣對應於該處之反射面的切平面與水平面的夾角。Please refer to FIG. 8. FIG. 8 is a schematic cross-sectional view of a curved backlight module according to a second preferred embodiment of the present invention. The curved backlight module 400 includes a light guide plate 410, a light source 421, a second light source 422, a plurality of light guiding structures 430, a diffusion sheet 440, and a reflection sheet 450. The difference between the curved backlight module 400 and the curved backlight module 200 is that The curved backlight module 400 is a curved structure with a central downward direction and a two-sided upward direction. The angle between the light guiding surface and the reflecting surface of the light guiding structure 430 also corresponds to the angle between the tangent plane of the reflecting surface and the horizontal plane.
請參照第9圖，第9圖係本發明第三較佳實施例之曲型背光模組的截面示意圖，曲型背光模組500包括導光板510、光源521、第二光源522、複數導光結構530、擴散片541與542，曲型背光模組500係應用於可雙面顯像的顯示裝置，曲型背光模組500與曲型背光模組200的差異在於，曲型背光模組500為雙面發光的設計，擴散片541之上方與擴散片542之下方分別設置有液晶顯示面板（未繪示），其中導光結構530設置於導光板510的兩側，且導光板510設置有導光結構530的兩面皆為出光面，位於導光板510任一面的導光結構530，其導光面與出光面的夾角亦同樣對應於該處之出光面的切平面與水平面的夾角。Referring to FIG. 9 , FIG. 9 is a schematic cross-sectional view of a curved backlight module according to a third preferred embodiment of the present invention. The curved backlight module 500 includes a light guide plate 510 , a light source 521 , a second light source 522 , and a plurality of light guides. The structure 530, the diffusion sheets 541 and 542, the curved backlight module 500 is applied to a display device capable of double-sided development, and the difference between the curved backlight module 500 and the curved backlight module 200 is that the curved backlight module 500 For the design of the double-sided illumination, a liquid crystal display panel (not shown) is disposed above the diffusion sheet 541 and the diffusion sheet 542. The light guide structure 530 is disposed on both sides of the light guide plate 510, and the light guide plate 510 is disposed. Both sides of the light guiding structure 530 are light emitting surfaces, and the light guiding structure 530 on either side of the light guiding plate 510 also has an angle between the light guiding surface and the light emitting surface corresponding to the angle between the tangent plane of the light emitting surface and the horizontal plane.
請參照第10圖，第10圖係本發明第四較佳實施例之曲型背光模組的截面示意圖，曲型背光模組600包括導光板610、光源621、第二光源622、複數導光結構630、擴散片640、反射片650與稜鏡片660，曲型背光模組600與曲型背光模組200的差異在於，曲型背光模組600於擴散片640的上方增加了稜鏡片660，藉此可更進一步的增加曲型背光模組600的出光亮度。10 is a cross-sectional view of a curved backlight module according to a fourth preferred embodiment of the present invention. The curved backlight module 600 includes a light guide plate 610, a light source 621, a second light source 622, and a plurality of light guides. The difference between the structure 630, the diffusion sheet 640, the reflection sheet 650 and the cymbal 660, the curved backlight module 600 and the curved backlight module 200 is that the curved backlight module 600 adds a cymbal 660 above the diffusion sheet 640. Thereby, the brightness of the curved backlight module 600 can be further increased.
綜上所述，本發明所提出的一種曲型背光模組，改善了顯示裝置所呈現的影像亮度不均勻的問題，使出光方向更具集中性，並提高了出光效率，同時還可減少光學膜片（如稜鏡片）的使用。In summary, the curved backlight module of the present invention improves the uneven brightness of the image displayed by the display device, makes the light-emitting direction more concentrated, improves the light-emitting efficiency, and reduces the optical efficiency. Use of diaphragms (such as cymbals).
雖然本發明已以較佳實施例揭露如上，然其並非用於限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作些許之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.
無no
210‧‧‧導光板 210‧‧‧Light guide plate
211‧‧‧出光面 211‧‧‧Glossy
212‧‧‧反射面 212‧‧‧reflecting surface
213‧‧‧入光面 213‧‧‧Into the glossy surface
221‧‧‧光源 221‧‧‧Light source
222‧‧‧第二光源 222‧‧‧second light source
230‧‧‧導光結構 230‧‧‧Light guiding structure
231‧‧‧導光面 231‧‧‧Lighting surface
232‧‧‧斜面 232‧‧‧Bevel
x1、x2、θ‧‧‧角度 x 1 , x 2 , θ‧‧‧ angle
Claims (10)
一導光板，該導光板具有一出光面、一反射面與一入光面，該出光面與該反射面互相對立設置，該入光面夾於該出光面與該反射面之間且位於該導光板的側邊，其中，該出光面與該反射面為曲面；
一光源，該光源面對該入光面設置；以及
複數導光結構，該些導光結構分佈於該導光板之一側且鄰接該反射面，其中，該導光結構具有一導光面，該導光面與該反射面夾有一傾斜角，該反射面的切平面與水平面夾有一夾角，該傾斜角之角度係對應於該夾角之角度。A curved backlight module is used in a display device, and the curved backlight module comprises:
a light guide plate having a light emitting surface, a reflecting surface and a light incident surface, wherein the light emitting surface and the reflecting surface are opposite to each other, and the light incident surface is sandwiched between the light emitting surface and the reflecting surface and located at the light guiding surface a side of the light guide plate, wherein the light exit surface and the reflective surface are curved surfaces;
a light source, the light source is disposed facing the light incident surface; and a plurality of light guiding structures are disposed on one side of the light guide plate and adjacent to the reflective surface, wherein the light guiding structure has a light guiding surface, The light guiding surface and the reflecting surface have an inclined angle, and the cutting plane of the reflecting surface has an angle with the horizontal plane, and the angle of the inclined angle corresponds to the angle of the angle.
x1 (θ)=41-0.4θ…………0≦θ≦15
x1 (θ)=x1 (15)-0.2(θ-15)…15<θ≦25
x1 (θ)=x1 (25)-0.4(θ-25)…25<θ≦30
x1 (θ)=x1 (30)-0.2(θ-30)…30<θ≦35
其中，x1 為該傾斜角之角度，θ為該夾角之角度。The curved backlight module of claim 2, wherein the relationship between the angle of the tilt angle and the angle of the angle is as follows:
x 1 (θ)=41-0.4θ............0≦θ≦15
x 1 (θ)=x 1 (15)-0.2(θ-15)...15<θ≦25
x 1 (θ)=x 1 (25)-0.4(θ-25)...25<θ≦30
x 1 (θ)=x 1 (30)-0.2(θ-30)...30<θ≦35
Where x 1 is the angle of the tilt angle and θ is the angle of the angle.
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| TW102123078A TWI526742B (en) | 2013-06-27 | 2013-06-27 | Curved back light module |
| CN201310424771.9A CN103438390B (en) | 2013-06-27 | 2013-09-17 | curved backlight module |
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| CN105022192A (en) * | 2015-08-10 | 2015-11-04 | 苏州固特斯电子科技有限公司 | High concentration photovoltaic liquid crystal display module |
| KR102570053B1 (en) | 2018-05-14 | 2023-08-23 | 라디안트 (광저우) 옵토-엘렉트로닉스 컴퍼니 리미티드 | Light guide plate, backlight module and display device |
| CN111679502B (en) * | 2020-06-28 | 2021-07-23 | 武汉华星光电技术有限公司 | Flexible backlight module and liquid crystal display panel |
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| GB2443849A (en) * | 2006-11-20 | 2008-05-21 | Sharp Kk | Backlight and display |
| US20100164860A1 (en) * | 2007-06-06 | 2010-07-01 | Sharp Kabushiki Kaisha | Liquid crystal display device |
| GB2455057A (en) * | 2007-10-08 | 2009-06-03 | Sharp Kk | Prismatic curved sheet optical device for use in a curved display |
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| MM4A | Annulment or lapse of patent due to non-payment of fees |