CN102865516B - Backlight module and light-emitting diode display - Google Patents
Backlight module and light-emitting diode display Download PDFInfo
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- CN102865516B CN102865516B CN201210372201.5A CN201210372201A CN102865516B CN 102865516 B CN102865516 B CN 102865516B CN 201210372201 A CN201210372201 A CN 201210372201A CN 102865516 B CN102865516 B CN 102865516B
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Abstract
The invention discloses a kind of backlight module and light-emitting diode display, described backlight module comprises the light source module and the backboard stacked successively, reflector plate and light guide plate with light-emitting area, described light guide plate one end extends to form the lighttight kink of an outer surface toward the bending of backboard direction, described kink distal end faces is incidence surface, and described light source module is fixed on back plate edges and its light-emitting area and described incidence surface are oppositely arranged.A kind of backlight module provided by the present invention, because light source module is positioned at outside backboard, its heat produced spreads directly to outside, can not gather in backboard inside, therefore improve radiating efficiency, thus solve all problems that the backlight module in conventional art causes because of poor heat radiation.Simultaneously, the light source that light source module sends is not directly enter from the side of light guide plate, but enters from kink incidence surface, in kink internal reflection and fully entry of backlight module internal again after mixed light, because this eliminating the dark space in backlight module, improve backlight effect.<!--1-->
Description
Technical field
The present invention relates to light-emitting diode display technical field, especially relate to a kind of backlight module and light-emitting diode display.
Background technology
The heat dissipation problem of LED-backlit module annoyings the technical staff in industry always, trace it to its cause, back plate edges in traditional backlight module is all provided with support plate usually, light source module is then fixed on the support plate inside backboard, thus cause backlight unit arrangements of components tight, and narrow space, the heat that LED produces cannot come out in time, therefore a lot of problem is caused, as:
1, LED in high temperature environments, and luminous efficiency reduces, lifetime.In actual design, designer has to deliberately to reduce the operating current of LED, to reduce the heat that the backlight module unit interval produces, thus makes LED information display system not be in optimal drive state, reduces luminous efficiency, also improve the cost of backlight module system schema.
2, the blooming piece in backlight module and light guide plate are at high temperature yielding, and cause backlight module to occur local shadow, bright dark uneven phenomenon, in addition, liquid crystal display at high temperature easily occurs light leakage phenomena, affects viewing effect.
3, for solving heat dissipation problem, module design to be had to aluminum backboard, thermal paste and the heat-dissipating aluminium plate of selecting cost higher, some producers even adopt waterway cooling system in module internal or embed radiator fan, which adds cost, and bring difficulty to structural design and backlight module lightness.
In addition, LED is some property illuminator, and its light source is that fan-shaped is launched, and generally the luminous light intensity in its bosom is maximum, and when some LED are in line, the interval between LED and LED will produce dark space.And traditional backlight module, its LED light source directly imports backlight unit by the side of light guide plate, not through abundant mixed light, therefore will produce dark space in the incident side of backlight module.
Summary of the invention
Main purpose of the present invention is to provide a kind of backlight module and light-emitting diode display, is intended to the dark space in the radiating efficiency of lower cost raising backlight module and elimination backlight module.
To achieve these objectives, the present invention proposes a kind of backlight module, comprise the light source module and the backboard stacked successively, reflector plate and light guide plate with light-emitting area, described light guide plate one end extends to form the lighttight kink of an outer surface toward the bending of backboard direction, described kink distal end faces is incidence surface, and described light source module is fixed on back plate edges and its light-emitting area and described incidence surface are oppositely arranged.
Preferably, described kink outer surface is covered with retroreflective sheeting or is coated with reflecting coating.
Preferably, described light source module comprises LED-baseplate and multiple LED, and described back plate edges is fixed in described LED-baseplate one end, and the other end stretches out described backboard and is fixed with described multiple LED.
Preferably, described incidence surface is provided with the groove of multiple accommodating described LED.
Preferably, the bending angle of described kink is θ, and 90 °≤θ < 180 °.
Preferably, described backboard is provided with reinforcement near one end of light source module.
Preferably, described kink outer surface is curved.
The present invention proposes a kind of light-emitting diode display simultaneously, it comprises a backlight module, this backlight module comprises the light source module and the backboard stacked successively, reflector plate and light guide plate with light-emitting area, described light guide plate one end extends to form the lighttight kink of an outer surface toward the bending of backboard direction, described kink distal end faces is incidence surface, and described light source module is fixed on back plate edges and its light-emitting area and described incidence surface are oppositely arranged.
A kind of backlight module provided by the present invention, because light source module is positioned at outside backboard, be fixed on back plate edges, its heat produced spreads directly to outside, can not gather in backboard inside, therefore improve radiating efficiency, thus solve all problems that the backlight module in conventional art causes because of poor heat radiation.Simultaneously, the light source that light source module sends is not directly enter from the side of light guide plate, but enters from kink incidence surface, in kink internal reflection and fully entry of backlight module internal again after mixed light, because this eliminating the dark space in backlight module, improve backlight effect.
Accompanying drawing explanation
Fig. 1 is the partial exploded view of backlight module one of the present invention preferred embodiment;
Fig. 2 is the partial sectional view of backlight module one of the present invention preferred embodiment.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
See a backlight module of the present invention preferred embodiment shown in Fig. 1-Fig. 2, described backlight module comprises the light source module 400 with light-emitting area and the backboard 100 stacked successively, reflector plate 200 and light guide plate 300, described light guide plate 300 one end extends to form the lighttight kink 310 of an outer surface 312 toward the bending of backboard 100 direction, kink 310 distal end faces is incidence surface 311, light source module 400 is then fixed on backboard frontside edge, and its light-emitting area 411 is oppositely arranged with described incidence surface 311, in order to reduce the loss of light source, preferably fit tightly.Namely as shown in the figure, the incidence surface of light source module unlike prior art just to light guide plate side, but towards the back side of light guide plate.Described kink 310 can be arranged separately, then light guide plate 300 side is fastened on, as preferably, kink 311 and the light guide plate 300 of the present embodiment are wholely set, more be conducive to the conduction of light source, and the outer surface 312 that kink 310 combines with light guide plate 300 upper surface is curved, being more conducive to is all-trans light source injects light guide plate 300, and profile is also more attractive in appearance.Light source module 400 mainly comprises some LED410, LED410 can be directly fixed on the edge of backboard 100, and be uniformly distributed along edge (now heat dispersion preferably aluminium base preferably selected by backboard), relative to conventional art, LED410 is placed in the diffusion being more conducive to heat inside backboard 100.As a kind of preferred embodiment, the light source module 400 of the present embodiment also comprises a LED-baseplate 420, is generally heat dispersion preferably aluminium base, this LED-baseplate 420 is fixed on the edge of backboard 100.Concrete, described backboard frontside edge is fixed in LED-baseplate 420 one end, and the preferably back side, and the other end stretches out described backboard 100 and is fixed with multiple LED410, and the plurality of LED410 is longitudinally uniformly distributed along LED-baseplate 420.
The light source that LED410 sends enters from the incidence surface 311 of kink 310, because kink 310 outer surface 312 is light tight, after the reflection of kink 310 outer surface 312, enter light guide plate 300, or be reflected back light guide plate 300 again after directive reflector plate 200, finally light whole backlight module.Because LED410 is positioned at outside backboard 100, it is directly fixed on backboard frontside edge, or be fixed on LED-baseplate 420 and do not contact with backboard 100, its heat produced spreads directly to outside, can not gather in backboard 100 inside, therefore radiating efficiency is high, thus solve all problems that the backlight module in conventional art causes because of poor heat radiation, such as: due to LED410 rapid heat dissipation, would not be too high and deliberately reduce its operating current in order to avoid its temperature, therefore can fully improve its luminous efficiency, reduce backlight module cost; Can not gather heat in backlight unit because radiating efficiency is high and produce high temperature, the light guide plate 300 in backlight module and blooming piece would not produce distortion by Yin Gaowen, and liquid crystal display would not occur light leakage phenomena, therefore improves the backlight effect of backlight module; When LED410 is fixed on LED-baseplate 420 and is not fixed on backboard 100, backboard 100 does not just need the aluminium sheet selecting cost higher, more need not in order to distribute the heat that is collected in backlight module and increase waterway cooling system and radiator fan, because this reducing cost, and be more conducive to liquid crystal display to do thin do narrow.Simultaneously, LED light source is not directly enter from the side of light guide plate 300, but reflect through kink 310, after the LED light source dispersed enters kink 310 with different angles, backlight unit is entered with various angle reflection in kink 310, being equivalent in kink 310 after abundant mixed light entry of backlight module internal again, because this eliminating the dark space in backlight module, improve backlight effect.
Further, described kink 310 outer surface 312 is covered with retroreflective sheeting or is coated with reflecting coating, to greatest extent the LED light source reflection in kink 310 is entered in light guide plate 300, thus decrease the loss of LED light source in transmittance process, add the brightness of backlight module.In addition, two end faces of kink 310 also can paste retroreflective sheeting or be coated with reflecting coating, prevent LED light source from penetrating from end face.
Further, the bending angle of described kink 310 is θ, and 90 °≤θ < 180 °.In fact, described bending angle θ is 0 ° of < θ < 180 °, but in order to obtain higher LED light source utilization rate, bending angle θ is preferably 90 °≤θ < 180 °, and angle is larger, LED light source more easily produces total reflection after entering kink and enters light guide plate, and LED light source loss is few, utilization rate is high, and the brightness of backlight module is also higher.
Further, described incidence surface 311 is provided with multiple groove (not shown), and this groove is corresponding with LED410, LED410 is placed in groove, thus LED light source can not distribute everywhere, all enter kink 310 and enter light guide plate 300 after kink 310 is totally reflected, further reducing the loss of LED light source, add the brightness of backlight module.
Further, described backboard 100 is provided with reinforcement and little convex closure near one end of light source module 400, the intensity of backboard 100 can be increased, particularly when backboard 100 selects thinner or yielding material, planarization and the intensity of whole backlight module can be strengthened, avoid causing because backboard 100 is out of shape the light-emitting area 411 of light source module 400 and the incidence surface 311 of kink 310 to misplace or isolate comparatively wide arc gap and light leak, reducing LED light source loss further.Certainly, if backboard 100 material is thicker or intensity better, in order to cut down finished cost, backboard 100 directly can be made simple slab construction.
The present invention proposes a kind of light-emitting diode display simultaneously, it comprises a backlight module, this backlight module comprises the light source module and the backboard stacked successively, reflector plate and light guide plate with light-emitting area, described light guide plate one end extends to form the lighttight kink of an outer surface toward the bending of backboard direction, described kink distal end faces is incidence surface, and described light source module is fixed on back plate edges and its light-emitting area and described incidence surface are oppositely arranged.Backlight module described in the present embodiment is the backlight module in the present invention involved by above-described embodiment, does not repeat them here.
Should be understood that; these are only the preferred embodiments of the present invention; can not therefore limit the scope of the claims of the present invention; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a backlight module, comprise the light source module and the backboard stacked successively, reflector plate and light guide plate with light-emitting area, it is characterized in that, described light guide plate one end extends to form the lighttight kink of an outer surface toward the bending of backboard direction, described kink distal end faces is incidence surface, and described light source module is fixed on back plate edges and its light-emitting area and described incidence surface are oppositely arranged;
Described light source module comprises LED-baseplate and multiple LED, and described back plate edges is fixed in described LED-baseplate one end, and the other end stretches out described backboard and is fixed with described multiple LED;
The bending angle of described kink is θ, and 90 ° of < θ < 180 °;
Two end faces of described kink are covered with retroreflective sheeting or are coated with reflecting coating;
Described kink outer surface is curved.
2. backlight module according to claim 1, is characterized in that, described kink outer surface is covered with retroreflective sheeting or is coated with reflecting coating.
3. backlight module according to claim 1, is characterized in that, described incidence surface is provided with the groove of multiple accommodating described LED.
4. backlight module according to claim 1, is characterized in that, described backboard is provided with reinforcement near one end of light source module.
5. a light-emitting diode display, is characterized in that, comprises the backlight module as described in any one of claim 1-4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210372201.5A CN102865516B (en) | 2012-09-28 | 2012-09-28 | Backlight module and light-emitting diode display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210372201.5A CN102865516B (en) | 2012-09-28 | 2012-09-28 | Backlight module and light-emitting diode display |
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| CN102865516A CN102865516A (en) | 2013-01-09 |
| CN102865516B true CN102865516B (en) | 2016-01-20 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680339A (en) * | 2013-12-11 | 2014-03-26 | 广东长虹电子有限公司 | Radiating board and displayer with radiating board |
| CN105987356B (en) * | 2015-01-28 | 2019-04-23 | 中强光电股份有限公司 | Light source module and L shape light guide plate |
| CN104848083B (en) | 2015-04-07 | 2017-07-28 | 武汉华星光电技术有限公司 | Display device and its backlight module |
| CN113419370B (en) * | 2018-06-06 | 2022-10-18 | 上海中航光电子有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN109164519B (en) * | 2018-09-26 | 2021-01-15 | 惠州市华星光电技术有限公司 | Diffusion plate, backlight structure and display panel |
| CN112292632B (en) * | 2019-05-13 | 2023-09-15 | 京东方科技集团股份有限公司 | electronic device |
| CN110297523B (en) * | 2019-06-30 | 2021-08-17 | Oppo广东移动通信有限公司 | Electronic device and control method thereof |
| CN115565451A (en) * | 2020-11-30 | 2023-01-03 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113253518A (en) * | 2021-05-18 | 2021-08-13 | 武汉华星光电技术有限公司 | Backlight module and display device |
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| CN1656411A (en) * | 2002-07-11 | 2005-08-17 | 迪尔阿扣基金两合公司 | Backlit liquid crystal display, particularly for use as a display module behind the operating panel of a large household appliance |
| CN102269387A (en) * | 2010-06-01 | 2011-12-07 | 中强光电股份有限公司 | Light guiding unit and light source module |
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| JP2003279971A (en) * | 2002-03-20 | 2003-10-02 | Kawaguchiko Seimitsu Co Ltd | Liquid crystal display device |
| JP2004119031A (en) * | 2002-09-24 | 2004-04-15 | Kawaguchiko Seimitsu Co Ltd | Backlight device of liquid crystal display panel |
| TWM317024U (en) * | 2006-07-25 | 2007-08-11 | Longtech Systems Corp | Brightness improved structure of lateral backlight for LCD |
| JP4134222B2 (en) * | 2006-09-21 | 2008-08-20 | シャープ株式会社 | Backlight device |
| US8085359B2 (en) * | 2008-04-16 | 2011-12-27 | Honeywell International Inc. | Folded backlight systems having low index regions that prevent light failing to meet total internal reflection conditions from entering a plate portion and liquid crystal displays using the same |
| TWI400532B (en) * | 2010-01-29 | 2013-07-01 | Radiant Opto Electronics Corp | Backlight module and liquid crystal display device including the same |
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Patent Citations (2)
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| CN1656411A (en) * | 2002-07-11 | 2005-08-17 | 迪尔阿扣基金两合公司 | Backlit liquid crystal display, particularly for use as a display module behind the operating panel of a large household appliance |
| CN102269387A (en) * | 2010-06-01 | 2011-12-07 | 中强光电股份有限公司 | Light guiding unit and light source module |
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Effective date of registration: 20210713 Address after: Room 821, No. 333, jiufo Jianshe Road, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou, Guangdong 510000 Patentee after: Skyworth Group Intelligent Technology Co., Ltd Address before: No.99, Kaida Road, Guangzhou Economic and technological development science and Technology City, Guangzhou, Guangdong 510000 Patentee before: GUANGZHOU SKYWORTH FLAT DISPLAY TECHNOLOGY Co.,Ltd. |