CN102980104A - Backlight module and display device utilizing same - Google Patents
Backlight module and display device utilizing same Download PDFInfo
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- CN102980104A CN102980104A CN2012105059869A CN201210505986A CN102980104A CN 102980104 A CN102980104 A CN 102980104A CN 2012105059869 A CN2012105059869 A CN 2012105059869A CN 201210505986 A CN201210505986 A CN 201210505986A CN 102980104 A CN102980104 A CN 102980104A
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Abstract
The invention provides a backlight module and a display device utilizing the same. The backlight module comprises a diffusion plate as well as a light source device and a first reflection plate, wherein the light source device is arranged between the diffusion plate and the first reflection plate, a light emitting surface of the light source device faces towards the first reflection plate, and the light transmitted by the light source device is reflected by the first reflection plate to the diffusion plate. The display device utilizing the backlight module comprises the backlight module. Due to the adoption of the backlight module, light spots with non-uniformity in brightness can be prevented from being formed on the front surface of the diffusion plate, so that the quantity of light emitting diode (LED) lamps used in the traditional direct-type backlight module can be reduced, or the overall thickness of the backlight module can be reduced, and an effect for utilizing an optical lens in the traditional direct-type backlight module can be realized under the situation that no optical lens is used. The display device utilizes the backlight module, so that the display quality is greatly improved.
Description
Technical field
The present invention relates to the Display Technique field, particularly relate to a kind of backlight module and use the display unit of this backlight module.
Background technology
Backlight module is one of significant components of liquid crystal display, because liquid crystal itself is not luminous, the function of backlight module is exactly well-off brightness and the light source that is evenly distributed, and makes normally show image of liquid crystal display.At present, it is ripe that the Display Technique of liquid crystal display has been tending towards, and especially the design aspect at backlight module also has a great development.Backlight module can also provide light source for display unit such as DPF, Electronic Paper, mobile phones except being applied in the liquid crystal indicators such as liquid crystal display, liquid crystal TV set.
Backlight module is divided into side-light backlight module and down straight aphototropism mode set according to the position difference of light source.Fig. 1 shows a kind of structure of backlight module of prior art, the LED lamp 2 ' that this backlight module comprises diffuser plate 1 ' and is arranged at the back side one side of diffuser plate 1 '.LED lamp 2 ' is fixed on the medial surface of backboard 3 ' of the back side one side that is arranged at equally diffuser plate 1 '.The exiting surface of LED lamp 2 ' is towards the back side of diffuser plate 1 '.Diffuser plate 1 ' converts the light that LED lamp 2 ' sends to area source.Because be subject to the restriction of the lighting angle of LED lamp 2 ', the ray cast that LED lamp 2 ' sends can form the bright interval that diameter is A on diffuser plate 1 ', if can not be overlapping between the clear zone between two LED lamp 2 ', the zone between between the clear zone be relatively dark.In order to guarantee the homogeneity of backlight module emitting brightness, generally take following several measure:
One, increases a number of LED lamp 2 ';
Two, the distance between the minimizing LED lamp 2 ' is to increase light mixing distance H;
Three, improve the size of A, namely increase optical lens 4 ' at LED lamp 2 ', increase the lighting angle of LED lamp 2 '.
There is respectively certain defect in above-mentioned three kinds of modes: a number that increases LED lamp 2 ' will certainly improve overall power and the price of backlight module, the requirement of discontented podomere energy; Increase the corresponding increase backlight module thickness of light mixing distance meeting, so that increase the integral thickness of the display unit of using this backlight module, do not satisfy lightening requirement; The third mode essence is for improving the lighting angle of LED, be use in the present down straight aphototropism mode set the most general, also be the most effective mode.But this kind mode needs the extra optical lens 4 ' that increases, and so also can increase the cost of backlight module.
Summary of the invention
The purpose of this invention is to provide and a kind ofly not only can satisfy energy-conservation requirement, but also can reduce under the condition of thickness of backlight module, be lifted out brightness homogeneity backlight module and use the display unit of this backlight module.
Backlight module of the present invention, the light supply apparatus and the first reflecting plate that comprise diffuser plate and all be arranged at the back side one side of described diffuser plate, described light supply apparatus is arranged between described diffuser plate and described the first reflecting plate, be used to described diffuser plate that light is provided, the exiting surface of described light supply apparatus is towards described the first reflecting plate, and the light reflection that described the first reflecting plate sends described light supply apparatus is to described diffuser plate.
Backlight module of the present invention, wherein, described light supply apparatus comprises light source and is arranged on described the first reflecting plate and extends at least the second reflecting plate between described light source and the described diffuser plate, described the second reflecting plate is towards described light source, the light that described the second reflecting plate sends described light source is to described the first baffle reflection, so that the exiting surface of described light supply apparatus is towards described the first reflecting plate.
Backlight module of the present invention, wherein, described the second reflecting plate comprises that an end is arranged on described the first reflecting plate, and the other end is connected to the first plate body of the place direction extension of described diffusion sheet and with the other end of described the first plate body and the second plate body between described light source and described diffuser plate.
Backlight module of the present invention, wherein, described the second reflecting plate comprises that also an end is arranged on the described reflecting plate, the 3rd plate body that the other end extends to the place direction of described diffusion sheet, the other end of described the 3rd plate body is connected with described the second plate body.
Backlight module of the present invention, wherein, described the first plate body and described the 3rd plate body connect respectively the relative both sides of described the second plate body.
Backlight module of the present invention, wherein, described light source is fixed on the face of described the first reflecting plate and/or on the medial surface of described the first plate body of described the second plate body.
Backlight module of the present invention wherein, is provided with for increasing the irreflexive diffusion particle of light on described the first reflecting plate.
Backlight module of the present invention, wherein, described diffusion particle is arranged on described the first reflecting plate in the inboard relative zone with described the second reflecting plate.
Backlight module of the present invention, wherein, described light supply apparatus is a plurality of, described a plurality of light supply apparatuses are along parallel with described diffuser plate arranged in a straight line between described diffuser plate and described the first reflecting plate.
The display unit of use backlight module of the present invention comprises backlight module of the present invention.
Backlight module of the present invention is when work, the light that light supply apparatus sends through the first baffle reflection after from entering diffuser plate, in reflection process, light is mixed, so both needn't increase light source to the distance of diffuser plate, and also needn't increase quantity of light source or lens and just can obtain the uniform incident light of brightness, avoid thus the lighting angle problem of light source, promote the homogeneity of diffuser plate emitting brightness, avoided the generation of hot spot.
Compare with traditional direct-light type LED backlight module, backlight module of the present invention is owing to changed the light direction of light source, can not form in the front of diffuser plate the hot spot of bright dark inequality, thereby can reduce a number of the LED lamp that uses in traditional down straight aphototropism mode set, perhaps reduce the integral thickness of backlight module, in the situation that does not adopt optical lens, reach the effect of using optical lens in traditional down straight aphototropism mode set.
The display unit of use backlight module of the present invention, because adopt backlight module of the present invention, its integral thickness can reduce, and cost can further reduce, and its display quality is greatly improved.
Description of drawings
Fig. 1 is the structural representation of the backlight module of prior art;
Fig. 2 is the front view of structural representation of the first embodiment of backlight module of the present invention;
Fig. 3 is that the light path of the first embodiment of backlight module of the present invention is propagated schematic diagram;
Fig. 4 is the cutaway view of bowing of Fig. 2, and the first embodiment that shows backlight module of the present invention removes the structure behind the diffuser plate;
Fig. 5 is the front view of structural representation of the second embodiment of backlight module of the present invention;
Fig. 6 is the front view of structural representation of the third embodiment of backlight module of the present invention;
Fig. 7 is the front view of structural representation of the 4th kind of embodiment of backlight module of the present invention.
The specific embodiment
Embodiment one
Such as Fig. 2, shown in Figure 3, the embodiment of backlight module of the present invention, the light supply apparatus 2 and the first reflecting plate 3 that comprise diffuser plate 1 and all be arranged at the back side one side of diffuser plate 1.Light supply apparatus 2 is arranged between diffuser plate 1 and the first reflecting plate 3, is used to diffuser plate 1 that light is provided.The light reflection that the exiting surface of light supply apparatus 2 sends light supply apparatus 2 towards the first reflecting plate 3, the first reflecting plates 3 is to diffuser plate 1.Backboard 6 is arranged at the back side of the first reflecting plate 3, is used for strengthening the bulk strength of backlight module.Hollow arrow among Fig. 3 shows the light transmition path.
Among the embodiment of backlight module of the present invention, the light that light supply apparatus sends in the down straight aphototropism mode set does not directly enter diffuser plate, but most directive the first reflecting plates, the light reflection that the first reflecting plate sends light supply apparatus is to diffuser plate, in reflection process, light is mixed, so both needn't increase light source to the distance of diffuser plate, also needn't increase quantity of light source or lens and just can obtain the uniform incident light of brightness, avoided thus the lighting angle problem of light source, promote the homogeneity of diffuser plate emitting brightness, avoided the generation of hot spot.
The embodiment of backlight module of the present invention, wherein, light supply apparatus 2 comprises light source 5 and is arranged on the first reflecting plate 3 and extends at least the second reflecting plate 4 between light source 5 and the diffuser plate 1, the second reflecting plate 4 is towards light source 5, the second reflecting plate 4 reflects the light that light source 5 sends to the first reflecting plate 3, so that the exiting surface of light supply apparatus 2 is towards the first reflecting plate 3.
The embodiment of backlight module of the present invention, wherein, the second reflecting plate 4 comprises that an end is arranged on the first reflecting plate 3, and the other end is connected to the first plate body 11 of the place direction extension of diffusion sheet 1 and with the other end of the first plate body 11 and the second plate body 12 between light source 5 and diffuser plate 1.The first plate body 11 and the second plate body 12 reflect the light that light source 5 sends to the first reflecting plate 3.
The embodiment of backlight module of the present invention, wherein, the second reflecting plate 4 comprises that also an end is arranged on the first reflecting plate 3, the other end is connected with the second plate body 12 to the other end of the 3rd plate body 13, the three plate bodys 13 that the place direction of diffusion sheet 1 is extended.
The embodiment of backlight module of the present invention, wherein, the first plate body 11 and the 3rd plate body 13 connect respectively the relative both sides of the second plate body 12.
The embodiment of backlight module of the present invention, wherein, light source 5 be fixed in the second plate body 12 on the face of the first reflecting plate 3, arrange like this light direct irradiation the first reflecting plate 3 that light source 5 is sent, avoid light loss.
The embodiment of backlight module of the present invention wherein, is provided with on the first reflecting plate 3 for increasing the irreflexive diffusion particle 7 of light.
The embodiment of backlight module of the present invention, wherein, diffusion particle 7 is arranged on the first reflecting plate 3 in the inboard relative zone with the second reflecting plate 4.Specifically, diffusion particle 7 be arranged on the first reflecting plate 3 with the inboard relative zone of the first plate body 11, the second plate body 12 in or be arranged on the first reflecting plate 3 in the inboard relative zone with the first plate body 11, the second plate body 12, the 3rd plate body 13.
The setting of diffusion particle 7 is enhanced the diffuse reflection of the light that light source 5 sends, and avoids light to concentrate and produces hot spot.
In conjunction with shown in Figure 4, the embodiment of backlight module of the present invention, wherein, light supply apparatus 2 is a plurality of, a plurality of light supply apparatuses 2 are along parallel with diffuser plate 1 arranged in a straight line between diffuser plate 1 and the first reflecting plate 3.
Embodiment two
In conjunction with shown in Figure 5, the difference of the embodiment of backlight module of the present invention and embodiment one only is in the light supply apparatus 2 that the arrangement of light source 5 is different.
The embodiment of backlight module of the present invention, wherein, light source 5 is fixed on the medial surface of the first plate body 11.The light that light source 5 sends, through the second plate body 12, the 3rd plate body 13 reflex to the first reflecting plate 3, the first reflecting plates 3 with light reflection to diffuser plate 1.Hollow arrow among Fig. 5 shows the light transmition path.
Embodiment three
In conjunction with shown in Figure 6, the difference of the embodiment of backlight module of the present invention and embodiment one, embodiment two only is in the light supply apparatus 2 that the arrangement of light source 5 is different.
The embodiment of backlight module of the present invention, wherein, light source 5 is fixed on the face of the first reflecting plate 3 and on the medial surface of the first plate body 11 of the second plate body 12.The light that light source 5 sends or through first reflecting plate 3 that reflexes to of the second plate body 12, the 3rd plate body 13, perhaps directly be incident upon the first reflecting plate 3, the first reflecting plates 3 with light reflection to diffuser plate 1.
Embodiment four
In conjunction with shown in Figure 7, the difference of the embodiment of backlight module of the present invention and embodiment one, embodiment two, embodiment three only is in the light supply apparatus 2 that the arrangement of light source 5 is different.Hollow arrow among Fig. 7 shows the light transmition path.
The embodiment of backlight module of the present invention, wherein, light source 5 is fixed on the face of the first reflecting plate 3, on the medial surface of the first plate body 11 and on the medial surface of the 3rd plate body 13 of the second plate body 12.The light that light source 5 sends or through first reflecting plate 3 that reflexes to of the second plate body 12, the 3rd plate body 13, perhaps directly be incident upon the first reflecting plate 3, the first reflecting plates 3 with light reflection to diffuser plate 1.
The display unit of the use backlight module of the embodiment of the invention comprises backlight module, and above-mentioned backlight module is the backlight module in above-described embodiment.
The invention provides a kind of brand-new back light module unit structure.The exiting surface of light source owing to be subject to the restriction of light source luminescent angle, need to provide larger light mixing distance or more LED lamp for guaranteeing certain brightness homogeneity up in the tradition down straight aphototropism mode set.The light that light source sends in the down straight aphototropism mode set of the present invention's design does not directly enter diffuser plate, but by upwards propagating after the reflection, has avoided the lighting angle problem of light source with this again.
Backlight module of the present invention in the situation of same LED quantity, not only can reduce backlight module thickness but also can Effective Raise picture homogeneity.
The display unit of the use backlight module of the embodiment of the invention comprises backlight module, and above-mentioned backlight module is the backlight module in above-described embodiment.Described display unit can be any product or parts with Presentation Function such as liquid crystal panel, Electronic Paper, oled panel, LCD TV, liquid crystal display, DPF, mobile phone, panel computer.In the above-mentioned display unit owing to adopted above-mentioned backlight module, backlight module in the situation of same LED quantity, not only can reduce backlight module thickness but also can Effective Raise picture homogeneity.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. backlight module, the light supply apparatus and the first reflecting plate that comprise diffuser plate and all be arranged at the back side one side of described diffuser plate, described light supply apparatus is arranged between described diffuser plate and described the first reflecting plate, be used to described diffuser plate that light is provided, it is characterized in that, the exiting surface of described light supply apparatus is towards described the first reflecting plate, and the light reflection that described the first reflecting plate sends described light supply apparatus is to described diffuser plate.
2. backlight module according to claim 1, it is characterized in that, described light supply apparatus comprises light source and is arranged on described the first reflecting plate and extends at least the second reflecting plate between described light source and the described diffuser plate, described the second reflecting plate is towards described light source, the light that described the second reflecting plate sends described light source is to described the first baffle reflection, so that the exiting surface of described light supply apparatus is towards described the first reflecting plate.
3. backlight module according to claim 2, it is characterized in that, described the second reflecting plate comprises that an end is arranged on described the first reflecting plate, and the other end is connected to the first plate body of the place direction extension of described diffusion sheet and with the other end of described the first plate body and the second plate body between described light source and described diffuser plate.
4. backlight module according to claim 3, it is characterized in that, described the second reflecting plate comprises that also an end is arranged on the described reflecting plate, the 3rd plate body that the other end extends to the place direction of described diffusion sheet, and the other end of described the 3rd plate body is connected with described the second plate body.
5. backlight module according to claim 4 is characterized in that, described the first plate body and described the 3rd plate body connect respectively the relative both sides of described the second plate body.
6. backlight module according to claim 5 is characterized in that, described light source is fixed on the face of described the first reflecting plate and/or on the medial surface of described the first plate body and/or on the medial surface of described the 3rd plate body of described the second plate body.
7. arbitrary described backlight module is characterized in that according to claim 1-6, is provided with diffusion particle on described the first reflecting plate.
8. backlight module according to claim 7 is characterized in that, described diffusion particle is arranged on described the first reflecting plate in the inboard relative zone with described the second reflecting plate.
9. backlight module according to claim 1 is characterized in that, described light supply apparatus is a plurality of, and described a plurality of light supply apparatuses are along parallel with described diffuser plate arranged in a straight line between described diffuser plate and described the first reflecting plate.
10. a display unit of using backlight module is characterized in that, comprises each described backlight module such as claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505986.9A CN102980104B (en) | 2012-11-30 | 2012-11-30 | Backlight module and use the display unit of this backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505986.9A CN102980104B (en) | 2012-11-30 | 2012-11-30 | Backlight module and use the display unit of this backlight module |
Publications (2)
| Publication Number | Publication Date |
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| CN102980104A true CN102980104A (en) | 2013-03-20 |
| CN102980104B CN102980104B (en) | 2016-03-30 |
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| CN201210505986.9A Expired - Fee Related CN102980104B (en) | 2012-11-30 | 2012-11-30 | Backlight module and use the display unit of this backlight module |
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Cited By (6)
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| CN103674496A (en) * | 2013-12-23 | 2014-03-26 | 京东方科技集团股份有限公司 | Light source luminescence characteristic detection device |
| CN103968300A (en) * | 2014-04-23 | 2014-08-06 | 京东方科技集团股份有限公司 | Backlight source and display device |
| CN105156941A (en) * | 2015-07-06 | 2015-12-16 | 高创(苏州)电子有限公司 | Backlight module and display device |
| CN109991777A (en) * | 2019-04-09 | 2019-07-09 | 深圳市华星光电半导体显示技术有限公司 | Backlight module and preparation method thereof and display device |
| CN112578589A (en) * | 2019-09-27 | 2021-03-30 | 海信视像科技股份有限公司 | Display device and backlight module |
| CN112771440A (en) * | 2019-09-05 | 2021-05-07 | 瑞仪(广州)光电子器件有限公司 | Backlight module and display device |
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| CN112578589A (en) * | 2019-09-27 | 2021-03-30 | 海信视像科技股份有限公司 | Display device and backlight module |
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| CN102980104B (en) | 2016-03-30 |
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