TW201341905A - Backlight module and liquid crystal display device - Google Patents
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Description
本發明涉及一種背光模組及液晶顯示裝置。The invention relates to a backlight module and a liquid crystal display device.
液晶顯示裝置因具有低輻射性、體積輕薄短小及耗電低等特點，已廣泛應用於手機、個人數位助理、計算機及電視等領域。由於液晶顯示裝置的液晶面板本身不具有發光特性，因此，為達到顯示效果，需要給液晶面板提供一背光模組以向液晶面板提供亮度充分且分佈均勻的平面光，從而實現液晶顯示裝置的顯示功能。The liquid crystal display device has been widely used in mobile phones, personal digital assistants, computers and televisions due to its low radiation, small size, short power consumption and low power consumption. Since the liquid crystal panel of the liquid crystal display device does not have the light-emitting property itself, in order to achieve the display effect, it is necessary to provide a backlight module to the liquid crystal panel to provide planar light with sufficient brightness and uniform distribution to the liquid crystal panel, thereby realizing display of the liquid crystal display device. Features.
背光模組主要包括導光板、光源、反射片以及一至多個光學膜片。光源通常為點光源或者線光源，點光源如發光二極體（LED）因其節能、環保的優點越來越多地被應用於背光模組中用於提供光線。而導光板則用於引導光線的方向，並達到亮度均勻的效果，從而為液晶面板提供分佈均勻的平面光。The backlight module mainly comprises a light guide plate, a light source, a reflective sheet and one or more optical films. The light source is usually a point source or a line source, and a point source such as a light-emitting diode (LED) is increasingly used in a backlight module for providing light due to its energy saving and environmental protection advantages. The light guide plate is used to guide the direction of the light and achieve uniform brightness, thereby providing uniform distribution of planar light to the liquid crystal panel.
為了適用於中大尺寸的液晶面板，可採用多顆點光源排列成線狀的光源帶（Light bar）以取代傳統的線光源，如冷陰極燈管（CCFL）。然而，點光源提供的光線入射於導光板入光面時，對應相鄰兩個點光源之間位置處的亮度較該點光源處低，導致該導光板的出光產生明顯的亮暗交替的現象，即熱點（Hotspot），引起整個背光模組出光不均勻。In order to be suitable for medium and large size liquid crystal panels, a plurality of point light sources may be arranged in a line-shaped light bar to replace a conventional line source such as a cold cathode lamp (CCFL). However, when the light provided by the point light source is incident on the light incident surface of the light guide plate, the brightness at a position corresponding to the position between the adjacent two point light sources is lower than that at the point light source, so that the light output of the light guide plate has a distinct bright and dark alternating phenomenon. , that is, Hotspot, causing uneven illumination of the entire backlight module.
有鑑於此，有必要提供一種出光均勻的背光模組。In view of this, it is necessary to provide a backlight module with uniform light output.
也有必要提供一種採用該背光模組的液晶顯示裝置。It is also necessary to provide a liquid crystal display device using the backlight module.
一種背光模組，其包括一導光板、一框架及多個點光源，該框架包括首尾相接的多個側壁及至少一自該側壁內表面向該框架內側延伸的支撐板，該導光板收容於該框架內且由該支撐板支撐，該導光板包括一入光面、一與該入光面相鄰的底面及一與該底面相對的出光面，該多個點光源也收容於該框架內且位於該入光面一側。該框架還包括至少一設置於該多個點光源之間的光反射元件，該光反射元件用於將來自該入光面一側的光線反射至該導光板再次利用。A backlight module includes a light guide plate, a frame and a plurality of point light sources, the frame includes a plurality of side walls that are connected end to end and at least one support plate extending from an inner surface of the side wall toward an inner side of the frame, the light guide plate receiving Supported by the support plate, the light guide plate includes a light incident surface, a bottom surface adjacent to the light incident surface, and a light emitting surface opposite to the bottom surface, and the plurality of point light sources are also received in the frame It is located on the side of the light incident surface. The frame further includes at least one light reflecting element disposed between the plurality of point light sources, the light reflecting element for reflecting light from a side of the light incident surface to the light guide plate for reuse.
一種液晶顯示裝置，其包括一液晶顯示面板與一為該液晶顯示面板提供平面光的背光模組，該背光模組包括一導光板、一框架及多個點光源，該框架包括首尾相接的多個側壁及至少一自該側壁內表面向該框架內側延伸的支撐板，該導光板收容於該框架內且由該支撐板支撐，該導光板包括一入光面、一與該入光面相鄰的底面及一與該底面相對的出光面，該多個點光源也收容於該框架內且位於該入光面一側。該框架還包括至少一設置於該多個點光源之間的光反射元件，該光反射元件用於將來自該入光面一側的光線反射至該導光板再次利用。A liquid crystal display device includes a liquid crystal display panel and a backlight module for providing planar light to the liquid crystal display panel. The backlight module includes a light guide plate, a frame and a plurality of point light sources, and the frame includes end to end a plurality of side walls and at least one support plate extending from the inner surface of the side wall toward the inner side of the frame, the light guide plate being received in the frame and supported by the support plate, the light guide plate comprising a light incident surface and a light incident surface The adjacent bottom surface and a light-emitting surface opposite to the bottom surface are also housed in the frame and located on the light-incident surface side. The frame further includes at least one light reflecting element disposed between the plurality of point light sources, the light reflecting element for reflecting light from a side of the light incident surface to the light guide plate for reuse.
與先前技術相比較，由於本發明背光模組具有設置於該多個點光源之間的凸塊，該凸塊能夠將該自該入光面一側的光線反射至該導光板再次利用，使得該導光板對應相鄰兩個點光源之間的位置處的入射光線增多，亮度提高，進而熱點現象被改善，該背光模組出光均勻。Compared with the prior art, the backlight module of the present invention has a bump disposed between the plurality of point light sources, and the bump can reflect the light from the side of the light incident surface to the light guide plate for reuse. The light guide plate increases the incident light at a position between two adjacent point light sources, the brightness is improved, and the hot spot phenomenon is improved, and the backlight module emits light uniformly.
請參閱圖1及圖2，圖1是本發明背光模組10第一實施方式的立體分解圖，圖2是圖1所示背光模組10的立體組裝示意圖。該背光模組10包括一框架11、一導光板13、及多個點光源15。本實施例中，該框架11為中空的框體結構，其包括首尾相接的四個側壁111、112、113、114及自二相對側壁111、113的內表面向該框架11內側延伸的二支撐板115。該導光板13收容於該框架11內，且二端由該支撐板115支撐。該導光板13包括一入光面131、一與該入光面131相鄰的出光面133及一與該出光面133相對的底面135。該多個點光源15也收容於該框架11內且位於該入光面131一側。1 and FIG. 2, FIG. 1 is an exploded perspective view of a first embodiment of a backlight module 10 of the present invention, and FIG. 2 is a perspective assembled view of the backlight module 10 of FIG. The backlight module 10 includes a frame 11 , a light guide plate 13 , and a plurality of point light sources 15 . In this embodiment, the frame 11 is a hollow frame structure including four side walls 111, 112, 113, 114 that end to end and two inner surfaces extending from the opposite side walls 111, 113 toward the inner side of the frame 11. Support plate 115. The light guide plate 13 is received in the frame 11 and the two ends are supported by the support plate 115. The light guide plate 13 includes a light incident surface 131, a light exit surface 133 adjacent to the light incident surface 131, and a bottom surface 135 opposite to the light exit surface 133. The plurality of point light sources 15 are also housed in the frame 11 and located on the light incident surface 131 side.
該框架11還包括多個設置於該多個點光源15之間的作為光反射元件的凸塊116，該多個凸塊116用於將來自該入光面131一側的光線反射至該導光板13再次利用。本實施例中，該凸塊116設置在該支撐板115上並連接該側壁。在一種變更實施例中，該凸塊116可以僅自該側壁111向該入光面延伸，該二支撐板115可以側壁112與114延伸出，即該支撐板115與該凸塊116自不同的側壁延伸出。The frame 11 further includes a plurality of bumps 116 as light reflecting elements disposed between the plurality of point light sources 15, and the plurality of bumps 116 are configured to reflect light from the side of the light incident surface 131 to the guide The light panel 13 is reused. In this embodiment, the bump 116 is disposed on the support plate 115 and connected to the sidewall. In a modified embodiment, the bump 116 can extend from the sidewall 111 only to the light incident surface, and the two support plates 115 can extend from the sidewalls 112 and 114, that is, the support panel 115 and the bump 116 are different from each other. The side walls extend out.
該凸塊116為長方體結構，其包括二鄰近該點光源15的第一表面117及一相對該入光面131設置且與該第一表面117相接的第二表面118。該第二表面118為光反射表面，可以將來自該入光面131一側的光線反射至該導光板13再次利用，以提高光利用率。具體地，該第二表面118可以覆蓋有一反射膜，或者，該凸塊116的材料為反射性能較好的白色塑膠材料。該凸塊116可以與該框架11的側壁111、112、113、114及支撐板115一體成型。The bump 116 is a rectangular parallelepiped structure including a first surface 117 adjacent to the point source 15 and a second surface 118 disposed opposite the first light surface 131 and contacting the first surface 117. The second surface 118 is a light reflecting surface, and the light from the side of the light incident surface 131 can be reflected to the light guide plate 13 for reuse to improve the light utilization efficiency. Specifically, the second surface 118 may be covered with a reflective film, or the material of the bump 116 is a white plastic material with better reflection performance. The bump 116 can be integrally formed with the sidewalls 111, 112, 113, 114 of the frame 11 and the support plate 115.
該多個點光源15與該多個凸塊116一一交替設置，每二相鄰設置的點光源15之間設置有一凸塊116。該點光源15可以為發光二極體，其發光面正對該入光面131。該導光板13鄰近該框架11的一角落處還包括一切面137，該切面137垂直連接於該出光面133與該底面135之間，但與該入光面131不在同一平面上，該切面137與該入光面131呈一鈍角。本實施例中，位於該框架角落處的點光源15的發光面仍正對該入光面131，但在一種變更實施例中，該點光源15也可以正對該切面137。The plurality of point light sources 15 are alternately arranged one by one with the plurality of bumps 116, and a bump 116 is disposed between each adjacent point light source 15 . The point light source 15 may be a light emitting diode whose light emitting surface faces the light incident surface 131. The light guide plate 13 further includes a face 137 adjacent to a corner of the frame 11 . The face 137 is vertically connected between the light exit surface 133 and the bottom surface 135 , but is not in the same plane as the light incident surface 131 . It has an obtuse angle with the light incident surface 131. In this embodiment, the light-emitting surface of the point light source 15 located at the corner of the frame is still facing the light-incident surface 131. However, in a modified embodiment, the point light source 15 may also face the cut surface 137.
請參閱圖3，其是圖2所示背光模組10的俯視圖。該點光源15發出的光自該入光面131進入該導光板13，一部分光線射自該出光面133射出；一部分光線射向該底面135並在該底面135發生全反射後從該出光面133射出；還有一部分光線經該底面135反射後，經由該入光面131射向該凸塊116的第二表面118，經該第二表面118反射後再次進入該導光板13，並進一步由該出光面133出射。Please refer to FIG. 3 , which is a top view of the backlight module 10 shown in FIG. 2 . The light emitted from the point light source 15 enters the light guide plate 13 from the light incident surface 131, and a part of the light is emitted from the light exit surface 133. A part of the light is incident on the bottom surface 135 and is totally reflected from the bottom surface 135. And a portion of the light is reflected by the bottom surface 135, and then is incident on the second surface 118 of the bump 116 via the light incident surface 131, reflected by the second surface 118, and then enters the light guide plate 13 again, and further The light exit surface 133 is emitted.
相較於先前技術，由於該背光模組10具有設置於該多個點光源15之間的凸塊116，該凸塊116能夠將該自該入光面131一側的光線反射至該導光板13再次利用，使得該導光板13對應相鄰兩個點光源15之間的位置處的入射光線增多，亮度提高，進而熱點現象被改善，該背光模組10出光均勻。Compared with the prior art, the backlight module 10 has a bump 116 disposed between the plurality of point light sources 15 , and the bump 116 can reflect the light from the side of the light incident surface 131 to the light guide plate. 13 is reused, so that the incident light of the light guide plate 13 corresponding to the position between the adjacent two point light sources 15 is increased, the brightness is improved, and the hot spot phenomenon is improved, and the backlight module 10 emits light uniformly.
請參閱圖4及圖5，圖4是本發明背光模組20第二實施方式的立體分解圖，圖5是圖4所示背光模組20的立體組裝示意圖。本發明第二實施方式的背光模組20與第一實施方式的背光模組10的區別主要在於：凸塊216正對導光板23的入光面231的反射用的第二表面218為一凹形面，該入光面231對應該第二表面218的部分包括一凸形面232。該第二表面218的凹形面與該凸形面232相互嚙合。4 and FIG. 5, FIG. 4 is an exploded perspective view of a second embodiment of the backlight module 20 of the present invention, and FIG. 5 is a perspective assembled view of the backlight module 20 of FIG. The backlight module 20 of the second embodiment of the present invention is different from the backlight module 10 of the first embodiment in that the second surface 218 of the bump 216 facing the light incident surface 231 of the light guide plate 23 is concave. The portion of the light incident surface 231 corresponding to the second surface 218 includes a convex surface 232. The concave surface of the second surface 218 and the convex surface 232 are in mesh with each other.
請參閱圖6，其是圖5所示背光模組20的俯視圖。本實施方式中，由於該反射用的第二表面218為凹形面，使得該第二表面218形成一凹面鏡，自該導光板23的凸形面232射入該第二表面218的光線被反射並匯集至該凹面鏡的焦點處，使得該焦點處可以形成一虛擬光源，提高該導光板23對應相鄰兩個點光源25之間位置處的亮度。本實施方式由於反射光線被彙聚，因而與第一實施方式相比，可以更有效的改善先前技術的熱點現象，本實施方式的背光模組20出光更均勻，光利用率更高。Please refer to FIG. 6 , which is a top view of the backlight module 20 shown in FIG. 5 . In this embodiment, since the second surface 218 for reflection is a concave surface, the second surface 218 forms a concave mirror, and the light incident on the second surface 218 from the convex surface 232 of the light guide plate 23 is reflected. And collecting to the focus of the concave mirror, so that a virtual light source can be formed at the focus, and the brightness of the light guide plate 23 corresponding to the position between the adjacent two point light sources 25 is increased. In this embodiment, since the reflected light is concentrated, the hot spot phenomenon of the prior art can be more effectively improved than that of the first embodiment. The backlight module 20 of the present embodiment has more uniform light emission and higher light utilization efficiency.
請參閱圖7，其是本發明背光模組30第三實施方式的俯視圖。本實施方式的背光模組30與第二實施方式的背光模組20的主要區別在於：導光板33的入光面331對應該點光源35處為一凹形面332，用於對該點光源35發出的光線進行一定發散，從而降低該導光板33對應該點光源35處的出光亮度，進一步改善熱點現象。Please refer to FIG. 7 , which is a top view of a third embodiment of the backlight module 30 of the present invention. The main difference between the backlight module 30 of the present embodiment and the backlight module 20 of the second embodiment is that the light incident surface 331 of the light guide plate 33 corresponds to a concave surface 332 at the point light source 35 for the point light source. The light emitted by the 35 is diverged to reduce the brightness of the light guide plate 33 corresponding to the point light source 35, thereby further improving the hot spot phenomenon.
請參閱圖8，其是本發明液晶顯示裝置40的一較佳實施方式的示意圖。該液晶顯示裝置40包括一液晶顯示面板41及一與該液晶顯示面板41層疊設置的背光模組43。該背光模組為該液晶顯示面板41提供均勻的平面光。該背光模組43採用上述第一、第二及第三實施方式任意一實施方式所述的背光模組。Please refer to FIG. 8, which is a schematic diagram of a preferred embodiment of a liquid crystal display device 40 of the present invention. The liquid crystal display device 40 includes a liquid crystal display panel 41 and a backlight module 43 stacked on the liquid crystal display panel 41. The backlight module provides uniform planar light to the liquid crystal display panel 41. The backlight module 43 is the backlight module according to any one of the first, second, and third embodiments.
綜上所述，本發明符合發明專利要件，爰依法提出專利申請。惟，以上所述者僅為本發明之較佳實施例，舉凡熟悉本案技藝之人士，在爰依本發明精神所作之等效修飾或變化，皆應涵蓋於以下之申請專利範圍內。In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.
10、20、30、43．．．背光模組10, 20, 30, 43. . . Backlight module
11．．．框架11. . . frame
13、23、33．．．導光板13, 23, 33. . . Light guide
15、25、35．．．點光源15, 25, 35. . . point Light
111、112、113、114．．．側壁111, 112, 113, 114. . . Side wall
115．．．支撐板115. . . Support plate
131、231、331．．．入光面131, 231, 331. . . Glossy surface
133．．．出光面133. . . Glossy surface
135．．．底面135. . . Bottom
116、216．．．凸塊116,216. . . Bump
117．．．第一表面117. . . First surface
118、218．．．第二表面118,218. . . Second surface
137．．．切面137. . . section
232．．．凸形面232. . . Convex surface
332．．．凹形面332. . . Concave surface
40．．．液晶顯示裝置40. . . Liquid crystal display device
41．．．液晶顯示面板41. . . LCD panel
圖1是本發明背光模組第一實施方式的立體分解圖。1 is an exploded perspective view of a first embodiment of a backlight module of the present invention.
圖2是圖1所示背光模組的立體組裝示意圖。2 is a schematic perspective view of the backlight module of FIG. 1 assembled.
圖3是圖2所示背光模組的俯視圖。3 is a top plan view of the backlight module of FIG. 2.
圖4是本發明背光模組第二實施方式的立體分解圖。4 is an exploded perspective view of a second embodiment of a backlight module of the present invention.
圖5是圖4所示背光模組的立體組裝示意圖。FIG. 5 is a perspective assembled view of the backlight module shown in FIG. 4. FIG.
圖6是圖5所示背光模組的俯視圖。6 is a top plan view of the backlight module of FIG. 5.
圖7是本發明背光模組第三實施方式的俯視圖。Fig. 7 is a plan view showing a third embodiment of the backlight module of the present invention.
圖8是本發明液晶顯示裝置的一較佳實施方式的示意圖。Figure 8 is a schematic view of a preferred embodiment of a liquid crystal display device of the present invention.
10．．．背光模組10. . . Backlight module
11．．．框架11. . . frame
13．．．導光板13. . . Light guide
15．．．點光源15. . . point Light
111、112、113、114．．．側壁111, 112, 113, 114. . . Side wall
115．．．支撐板115. . . Support plate
131．．．入光面131. . . Glossy surface
133．．．出光面133. . . Glossy surface
135．．．底面135. . . Bottom
116．．．凸塊116. . . Bump
117．．．第一表面117. . . First surface
118．．．第二表面118. . . Second surface
137．．．切面137. . . section
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210040275 CN103292207A (en) | 2012-02-22 | 2012-02-22 | Backlight module and liquid crystal display device |
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| TW201341905A true TW201341905A (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW101147810A TW201341905A (en) | 2012-02-22 | 2012-12-17 | Backlight module and liquid crystal display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103292207A (en) |
| TW (1) | TW201341905A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994399B (en) | 2014-05-12 | 2016-02-17 | 合肥京东方显示光源有限公司 | Light compensating part, shading rubber belt, backlight module and display unit |
| CN105353558B (en) * | 2015-11-16 | 2019-11-08 | 合一智能科技（深圳）有限公司 | A kind of Novel back optical mode group |
| CN110148354A (en) * | 2019-05-27 | 2019-08-20 | Oppo广东移动通信有限公司 | Backlight module, display screen component and electronic equipment |
-
2012
- 2012-02-22 CN CN 201210040275 patent/CN103292207A/en active Pending
- 2012-12-17 TW TW101147810A patent/TW201341905A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN103292207A (en) | 2013-09-11 |
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