CN103968300A - Backlight source and display device - Google Patents
Backlight source and display device Download PDFInfo
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- CN103968300A CN103968300A CN201410165628.7A CN201410165628A CN103968300A CN 103968300 A CN103968300 A CN 103968300A CN 201410165628 A CN201410165628 A CN 201410165628A CN 103968300 A CN103968300 A CN 103968300A
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- light source
- light
- backboard
- backlight
- diffuser plate
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Abstract
The invention discloses a backlight source and a display device. The backlight source comprises a diffusion plate, a back plate, a light source and a reflector. The light source is arranged below the back plate, the light source and the back plate are both attached to the bottom face of the diffusion plate, a light-emitting face of the light source faces the reflector below the light source, and the position, corresponding to the light source, on the back plate is a bent portion. According the backlight source and the display device, the back plate is tightly attached to the diffusion plate, the light source is arranged opposite to the back plate so that the light-emitting face can face the reflector, light emitted by the light source is reflected by using the reflector, and on the premise of guaranteeing even light, the size of an optical cavity for mixed lighting is reduced into half of the original size, so that the design of the thin-typed backlight source is achieved.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly a kind of backlight and display unit.
Background technology
Liquid crystal display (Liquid Crystal Display is called for short LCD) comprises liquid crystal panel and backlight, and the light that backlight sends is through liquid crystal panel.Existing backlight is divided into two kinds of straight-down negative and side entering types according to the setting position of fluorescent tube.Wherein straight-down negative is that side entering type is at the edge designs LED of liquid crystal display lamp at the back side of liquid crystal display design LED lamp.General large-sized display direct-light-type backlight, undersized display side-edge type backlight, current most display direct-light-type backlights.
The structural representation of direct-light-type backlight as shown in Figure 1, below display screen 01, be disposed with brightening piece 02, on diffusion sheet 03, light-collecting piece 04, lower diffusion sheet 05 and diffuser plate 06, above backboard 07, be also provided with reflector plate 08, be attached on backboard 07, to realize, light is reflected.For meeting direct-light-type backlight uniformly light-emitting object, need between diffuser plate 06 and backboard 07, be provided with enough spacing to be formed for the optics cavity of mixed light, making the light that LED lamp is launched need to satisfied light mixing distance be h through abundant mixed light, and the distance between diffuser plate 06 and backboard 07 is h.
Need ensure that in order to meet the demand of light mixing distance the distance between diffuser plate 06 and backboard 07 meets certain demand, but will cause realizing like this slimming of display.Equally, in order to realize slimming, shorten the distance between diffuser plate 06 and backboard 07, will cause light mixing distance deficiency, thereby cause light can not mix the phenomenon that produces light and shade inequality completely.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is how in realizing slimming, can also avoid cannot mixing because light mixing distance deficiency causes light the phenomenon that produces light and shade inequality completely.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of backlight, comprise diffuser plate, backboard, light source and reflector plate, light source is arranged on the below of backboard, jointly be attached to the bottom surface of diffuser plate with backboard, the light-emitting area of light source is towards the reflector plate of light source below, and on backboard, the position of corresponding light source is bending part.
Further, described backboard is that transparent material is made.
Further, described bending part is on backboard, to be shaped as step-like part, forms space for making between backboard and diffuser plate.
Further, the cross section of described step is trapezoidal, between trapezoidal bottom and diffuser plate, has inclination angle.
Further, described inclination angle is 60 °.
Further, the number of described light source is multiple, the spacing between adjacent light source
wherein h/2 is the distance between backboard and reflector plate, and h is light mixing distance, and a is light source height.
Further, described diffuser plate top is disposed with lower diffusion sheet, light-collecting piece, upper diffusion sheet and brightening piece from the bottom to top.
Further, described reflector plate is mirror-reflection sheet.
Further, described light source is LED lamp.
Further, described backboard is that the material that thermal diffusivity is good is made.
For solving the problems of the technologies described above, the present invention also provides a kind of display unit, comprises above-described backlight.
(3) beneficial effect
A kind of backlight and display unit that the embodiment of the present invention provides, wherein backlight comprises diffuser plate, backboard, light source and reflector plate, light source is arranged on the below of backboard, jointly be attached to the bottom surface of diffuser plate with backboard, the light-emitting area of light source is towards the reflector plate of light source below, and on backboard, the position of corresponding light source is bending part.By backboard being close to diffuser plate setting, by light source backboard setting dorsad, make light-emitting area towards reflector plate, utilize the light that reflector plate sends light source to reflect, ensureing under the uniform prerequisite of light, make to shorten to original half for the optics cavity of mixed light, realize the design of slimming backlight.
Brief description of the drawings
Fig. 1 is the structural representation of prior art direct-light-type backlight;
Fig. 2 is the part-structure schematic diagram of a kind of backlight of providing in the embodiment of the present invention;
Fig. 3 is the enlarged drawing to bending part in the embodiment of the present invention;
Fig. 4 is the schematic diagram in the situation that of not bending of backboard;
Fig. 5 is the schematic diagram adopting under the present embodiment bending design conditions;
Fig. 6 is bending part light transmition schematic diagram in the embodiment of the present invention;
The backlight overall structure figure of Fig. 7 for providing in the embodiment of the present invention.
In figure, the implication of numbering representative is respectively:
01, display screen; 02, brightening piece; 03, upper diffusion sheet; 04, light-collecting piece; 05, lower diffusion sheet; 06, diffuser plate; 07, backboard; 08, reflector plate; 09, light source; 10, bending part.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
The embodiment of the present invention provides a kind of backlight, part-structure schematic diagram as shown in Figure 2, comprise diffuser plate 06, backboard 07, light source 09 and reflector plate 08, light source 09 is arranged on the below of backboard 07, jointly be attached to the bottom surface of diffuser plate 06 with backboard 07, the light-emitting area of light source 09 is towards the reflector plate 08 of light source 09 below, and on backboard 07, the position of corresponding light source 09 is bending part 10.
Above-mentioned backlight improves by the back board structure to existing direct-light-type backlight, bending part is arranged to in the position of backboard corresponding light source, and light source is arranged back to this bending part, the forelock light that makes light source is facing to the reflector plate of light source below, make light that light source sends through the reflected illumination of reflector plate on light source backboard behind.If it is h that light mixing distance requires, because making the actual light mixing distance that the optics cavity forming between backboard and reflector plate has, the mirror-reflection principle of reflector plate only need to reach the half of light mixing distance under normal circumstances, just can realize the mixed light that effect is identical, realize the slimming design of backlight, can also avoid the generation that causes producing light and shade uneven phenomenon due to light mixing distance deficiency simultaneously.
Concrete, the backboard 07 in the present embodiment be LED substrate, specifically for supporting LED, and the wiring board of powering for LED.In order to allow light pass through, backboard 07 is made for transparent material.Further, backboard 07 can also be made for the good material of thermal diffusivity on transparent basis, during due to light source luminescent, can produce a part of heat, if backboard 07 is to make by the good material of thermal diffusivity the heat producing can also be in time by light source luminescent time to shed in time, avoid because heat is too high on the backlight impact in service life.It should be noted that, in the present embodiment, preferred back sheet is that the material transparent, thermal diffusivity is good is made herein, but does not do mandatory requirement for thermal diffusivity, and backboard only meets transparent requirement.The present embodiment dorsulum is transparent and reflector plate is set below light source, in order to increase light path, light source is inverted, luminous to the reflector plate that is positioned at light source below, then again light is reflected up by the reflector plate of below, but light has been equivalent to propagate the light path of actual range twice between backboard and reflector plate through reflection, shortens actual range does not shorten light and carry out the optical path length of mixed light, avoids the generation due to the demonstration light and shade non-uniform phenomenon of the inhomogeneous generation of mixed light.If backboard is opaque, light just can not pass so, finally can leave shadow at display picture.
Further, the bending part 10 in the present embodiment is shaped as step-like part on backboard 07, forms space, to the enlarged drawing of bending part as shown in Figure 3 for making between backboard 07 and diffuser plate 06.Backboard is carried out to suitable bending, with under light supplement, concrete, the cross section of step is trapezoidal, between trapezoidal bottom and diffuser plate 06, have inclination angle, the object of bending, for light can be mapped to after light source 09, can not produce shade behind at light source.Fig. 4 is the schematic diagram in the situation that of not bending of backboard, and light cannot pass through, and can form at the light source back side shade; Fig. 5 is the schematic diagram adopting under the present embodiment bending design conditions, and the light of contiguous light source can be passed after reflector plate refraction, and in figure, light can be through the backboard with inclination angle, is irradiated on light source diffuser plate behind, can not form shade.
Form step-like bending part by the behind of light source on backboard, in order to allow the light of contiguous light source be radiated at diffuser plate through backboard, according to ordinary light source shooting angle 120 ° of left and right, choose shooting angle generally as inclination angle, the angular dimension that is inclination angle is preferably 60 °, light transmition schematic diagram shown in Figure 6.In Fig. 6, light is from light source penetrates, after the reflector plate reflection of below, return to upper strata, optical fiber is beaten on diffuser plate through transparent backboard, even if the back side of corresponding light source also has light to open on diffuser plate, not only can reach the object that increases light path, can also avoid forming shade behind at light source, thereby avoid the generation of light and shade non-uniform phenomenon.
In conjunction with Fig. 6, the number that the light source in the present embodiment sees through the following light source of principle of reflector plate increase light path is multiple, and because the position of light source is corresponding with the position of bending part on backboard, therefore the number of light source is consistent with the number of bending part on backboard.Spacing between adjacent light source
wherein h/2 is the distance between backboard and reflector plate, and h is light mixing distance, specifically refers to the distance that light is propagated, and a is light source height.
Further, in the present embodiment backlight except said structure is improved, above diffuser plate, be also provided with successively from the bottom to top lower diffusion sheet, light-collecting piece, on diffusion sheet and brightening piece.Therefore, as shown in Figure 7, the distance between visible optical cavity segment backboard and reflector plate has been reduced to original half, i.e. h/2 to the overall structure figure of the backlight providing in the present embodiment.
Further, the reflector plate in the present embodiment is mirror-reflection sheet, and to realize the mirror-reflection of light, making light path is the twice of actual range.
Further, the light source in the present embodiment is LED lamp.
Based on above-mentioned, in the present embodiment, the number of assembling steps of backlight is as follows:
First, the backboard of selecting transparent material to make, and it is carried out to bending processing, form the bending part with 60 ° of inclination angle steps; Then the bottom of LED lamp is arranged on to this bending part; Mirror-reflection sheet is installed afterwards below light source; Again LED lamp is attached to diffuser plate below together with backboard, ensures that the light-emitting area of LED lamp is towards mirror-reflection sheet; Finally according to existing installation procedure successively under installing above diffuser plate diffusion sheet, light-collecting piece, on diffusion sheet and brightening piece, complete the assembling of backlight.
In sum, the backlight being implemented in example shortens to original half (h/2) by optics cavity for the actual range of mixed light, can ensure complete mixed light, avoids producing the generation of light and shade inequality and phenomenon, can also realize backlight slimming design.
In addition, the embodiment of the present invention also provides a kind of display unit, comprises above-mentioned backlight.
Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (11)
1. a backlight, is characterized in that, comprises diffuser plate, backboard, light source and reflector plate, light source is arranged on the below of backboard, jointly be attached to the bottom surface of diffuser plate with backboard, the light-emitting area of light source is towards the reflector plate of light source below, and on backboard, the position of corresponding light source is bending part.
2. backlight as claimed in claim 1, is characterized in that, described backboard is made up of transparent material.
3. backlight as claimed in claim 1, is characterized in that, described bending part is on backboard, to be shaped as step-like part, forms space for making between backboard and diffuser plate.
4. backlight as claimed in claim 3, is characterized in that, the cross section of described step is trapezoidal, between trapezoidal bottom and diffuser plate, has inclination angle.
5. backlight as claimed in claim 4, is characterized in that, described inclination angle is 60 °.
6. backlight as claimed in claim 5, is characterized in that, the number of described light source is multiple, the spacing between adjacent light source
wherein h/2 is the distance between backboard and reflector plate, and h is light mixing distance, and a is light source height.
7. backlight as claimed in claim 1, is characterized in that, described diffuser plate top is disposed with lower diffusion sheet, light-collecting piece, upper diffusion sheet and brightening piece from the bottom to top.
8. backlight as claimed in claim 1, is characterized in that, described reflector plate is mirror-reflection sheet.
9. the backlight as described in any one in claim 1-6, is characterized in that, described light source is LED lamp.
10. backlight as claimed in claim 2, is characterized in that, described backboard is made up of the good material of thermal diffusivity.
11. 1 kinds of display unit, is characterized in that, comprise the backlight described in any one in claim 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165628.7A CN103968300A (en) | 2014-04-23 | 2014-04-23 | Backlight source and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165628.7A CN103968300A (en) | 2014-04-23 | 2014-04-23 | Backlight source and display device |
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| CN103968300A true CN103968300A (en) | 2014-08-06 |
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| CN201410165628.7A Pending CN103968300A (en) | 2014-04-23 | 2014-04-23 | Backlight source and display device |
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| WO2017161673A1 (en) * | 2016-03-25 | 2017-09-28 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN108987382A (en) * | 2018-07-27 | 2018-12-11 | 京东方科技集团股份有限公司 | A kind of electroluminescent device and preparation method thereof |
| US10520664B2 (en) | 2016-03-25 | 2019-12-31 | Boe Technology Group Co., Ltd. | Backlight module and display device |
| JP2020003732A (en) * | 2018-06-29 | 2020-01-09 | パナソニックＩｐマネジメント株式会社 | Display device, display system, moving body |
| US10732457B2 (en) | 2018-04-19 | 2020-08-04 | Hon Hai Precision Industry Co., Ltd. | Backlight module and display device having transparent substrate with a plurality of light source disposed thereon |
| CN111722433A (en) * | 2019-03-22 | 2020-09-29 | 中强光电股份有限公司 | Light source module and display device |
| CN113138496A (en) * | 2021-04-16 | 2021-07-20 | 武汉华星光电半导体显示技术有限公司 | Backlight module and display device |
| CN113534536A (en) * | 2021-07-14 | 2021-10-22 | 武汉华星光电半导体显示技术有限公司 | Backlight module, preparation method thereof and display device |
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| WO2017161673A1 (en) * | 2016-03-25 | 2017-09-28 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US10234124B2 (en) | 2016-03-25 | 2019-03-19 | Boe Technology Group Co., Ltd. | Backlight module and display device |
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| US11789324B2 (en) | 2018-06-29 | 2023-10-17 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| US11768410B2 (en) | 2018-06-29 | 2023-09-26 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| US11768411B2 (en) | 2018-06-29 | 2023-09-26 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| US11275281B2 (en) | 2018-06-29 | 2022-03-15 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| US11754890B2 (en) | 2018-06-29 | 2023-09-12 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| US11709401B2 (en) | 2018-06-29 | 2023-07-25 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| US11709400B2 (en) | 2018-06-29 | 2023-07-25 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| US11726374B2 (en) | 2018-06-29 | 2023-08-15 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| JP2020003732A (en) * | 2018-06-29 | 2020-01-09 | パナソニックＩｐマネジメント株式会社 | Display device, display system, moving body |
| US11740517B2 (en) | 2018-06-29 | 2023-08-29 | Panasonic Intellectual Property Management Co., Ltd. | Display, display system, image projection system, and movable object |
| CN108987382A (en) * | 2018-07-27 | 2018-12-11 | 京东方科技集团股份有限公司 | A kind of electroluminescent device and preparation method thereof |
| CN111722433A (en) * | 2019-03-22 | 2020-09-29 | 中强光电股份有限公司 | Light source module and display device |
| CN113138496A (en) * | 2021-04-16 | 2021-07-20 | 武汉华星光电半导体显示技术有限公司 | Backlight module and display device |
| CN113534536A (en) * | 2021-07-14 | 2021-10-22 | 武汉华星光电半导体显示技术有限公司 | Backlight module, preparation method thereof and display device |
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Application publication date: 20140806 |