CN202972973U - Back plate used for backlight, backlight and display device - Google Patents
Back plate used for backlight, backlight and display device Download PDFInfo
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- CN202972973U CN202972973U CN2012206949399U CN201220694939U CN202972973U CN 202972973 U CN202972973 U CN 202972973U CN 2012206949399 U CN2012206949399 U CN 2012206949399U CN 201220694939 U CN201220694939 U CN 201220694939U CN 202972973 U CN202972973 U CN 202972973U
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Abstract
The utility model provides a back plate used for a backlight, a backlight and a display device. The back plate comprises a first side and a second side, the first side is provided with a reflecting plane with a first area and a second area, the reflecting plane of the first area and the reflecting plane of the second area are both composed of a plurality of concave arcs, the curvature of the concave arcs of the reflecting plane of the first area gradually increases, the curvature of the concave arcs of the reflecting plane of the second area gradually decreases, and the concave arc with the biggest curvature in the reflecting plane of the first area is connected with the concave arc with the biggest curvature in the reflecting plane of the second area. The light guide plate of the backlight is replaced with the back plate, and the reflecting plane formed by the concave arcs on the back plate is utilized to reflect a light source on a display panel. Due to the fact that the concave arcs have certain curvature, the light emitted by the light source is reflected to be even light rays. The display device utilizes the back plate to replace the light guide plate, and therefore producing cost is greatly reduced.
Description
Technical field
The utility model relates to field of display, particularly a kind of backboard for backlight, backlight and display unit.
Background technology
The advantage such as that liquid crystal indicator has is light, thin, power consumption is little, be widely used in the modernization information equipment, because panel of LCD (LCD panel) itself is not had a characteristics of luminescence, need to rely on that backlight is in liberal supply reaches the function of demonstration with light source that be evenly distributed, so the quality of backlight performance directly has influence on the quality of LCD.At LCD under the trend of high brightness, slimming development, will be towards future developments such as low cost, low-power consumption, environmental protection, Ultrathin high-brightness for the backlight characteristic requirements.
In present back light source structure, LGP(Light guide plate, LGP) parts that are absolutely necessary, the light that utilizes LGP light source can be sent evenly enters display floater.But the cost of LGP is higher, and various unfavorable conditions easily occur in use, has influence on the normal operation of display.
The utility model content
To need to use expensive LGP in existing backlight in order solving, various unfavorable conditions easily to occur when using LGP.
for solving the problems of the technologies described above, embodiment of the present utility model provides a kind of backboard for backlight, described backboard comprises first surface and second, wherein has the reflecting surface that comprises first area and second area on the one side, described first area reflecting surface and second area reflecting surface all are comprised of some sections concave surface arcs, the curvature of the concave surface arc of described first area reflecting surface increases gradually, the curvature of the concave surface arc of described second area reflecting surface reduces gradually, the concave surface arc of described first area reflecting surface mean curvature maximum is connected with the concave surface arc of second area reflecting surface mean curvature maximum.
In above-mentioned backboard, described first area reflecting surface comprises the first concave surface arc, the second concave surface arc and the 3rd concave surface arc, and its curvature is respectively 0.004 ~ 0.007,0.008 ~ 0.011,0.03 ~ 0.06;
Described second area reflecting surface comprises the 4th concave surface arc, the 5th concave surface arc, the 6th concave surface arc and the 7th concave surface arc, and its curvature is respectively 0.008 ~ 0.01,0.005 ~ 0.007,0.002 ~ 0.004,0.0006 ~ 0.001.
In above-mentioned backboard, the central angle alpha 1 of described the first concave surface arc is 2 ~ 4 degree; The central angle alpha 2 of the second concave surface arc is 5 ~ 8 degree; The central angle alpha 3 of the 3rd concave surface arc is 7 ~ 9 degree; The central angle alpha 4 of the 4th concave surface arc is 8 ~ 11 degree; The central angle alpha 5 of the 5th concave surface arc is 3 ~ 5 degree; The central angle alpha 6 of the 6th concave surface arc is 3 ~ 6 degree; The central angle alpha 7 of the 7th concave surface arc is 2 ~ 4 degree.
In above-mentioned backboard, described reflecting surface also comprises the 3rd zone, and described the 3rd regional reflex face comprises the 8th concave surface arc and the 9th concave surface arc, and its curvature is respectively 0.001 ~ 0.004,0.001 ~ 0.003, and described the 8th concave surface arc is connected with the 7th concave surface arc.
In above-mentioned backboard, the central angle alpha 8 of described the 8th concave surface arc is 2 ~ 4 degree; The central angle alpha 9 of the 9th concave surface arc is 1 ~ 3 degree.
In above-mentioned backboard, described reflecting surface also comprises one section convex surface arc, and described convex surface arc is connected with the 9th concave surface arc, and the curvature of described convex surface arc is 0.004 ~ 0.007, and the central angle alpha 10 of described convex surface arc is 4 ~ 7 degree.
In above-mentioned backboard, have two on the one side of described backboard and become axisymmetric the first reflecting surface and the second reflecting surface, every reflecting surface all comprises first area, second area and the 3rd zone, described first area, second area and the 3rd zone all are comprised of some sections concave surface arcs, the curvature of the concave surface arc of described first area reflecting surface increases gradually, the curvature of the concave surface arc of described second area reflecting surface reduces gradually, and the concave surface arc of described first area reflecting surface mean curvature maximum is connected with the concave surface arc of second area reflecting surface mean curvature maximum.
The utility model also provides a kind of backlight, comprises described backboard and the LED lamp that is arranged on backboard one side.
In above-mentioned backlight, described LED lamp is arranged on a side of close first area on reflecting surface.
The utility model also provides a kind of display unit, comprises described backlight.
The beneficial effect of technique scheme of the present utility model is as follows: the utility model replaces with backboard with the LGP of backlight, the reflecting surface that utilizes backboard upper recess surface arc to form reflexes to source light on display floater, first increase because the concave surface arc comprises curvature the concave surface arc that subtracts afterwards variation, make the light that light source sends be reflected into light comparatively uniformly.Display unit of the present utility model utilizes backboard to substitute LGP, thereby greatly reduces production cost.
Description of drawings
Fig. 1 is the structural representation of the display unit of a kind of embodiment of the utility model;
Fig. 2 is the structural representation of the backboard of a kind of embodiment of the utility model;
Fig. 3 is the intensity map of central distribution line of the backlight test of a kind of embodiment of the utility model;
Fig. 4 is 9 brightness distribution maps of the backlight test of a kind of embodiment of the utility model.
The specific embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
as shown in Figure 1, structural representation for a kind of embodiment display unit of the utility model, this display unit comprises backboard, light source 200 and display floater 300, light source 200 is arranged on a side of backboard, this backboard comprises first surface and second, has the reflecting surface 100 that comprises first area and second area on the one side of backboard, described first area reflecting surface and second area reflecting surface all are comprised of some sections concave surface arcs, the curvature of the concave surface arc of described first area reflecting surface increases gradually, the curvature of the concave surface arc of described second area reflecting surface reduces gradually, the concave surface arc of described first area reflecting surface mean curvature maximum is connected with the concave surface arc of second area reflecting surface mean curvature maximum.The utility model replaces with backboard with the LGP of backlight, the reflecting surface that utilizes backboard upper recess surface arc to form reflexes to source light on display floater, first increase because reflecting surface comprises curvature the concave surface arc that subtracts afterwards variation, make the light that light source sends be reflected into light comparatively uniformly.Display unit of the present utility model utilizes backboard to substitute LGP, thereby greatly reduces production cost.
Light source of the present utility model can be the various light sources such as LED lamp, the material of this backboard can be Merlon (Polycarbonate) or polyacrylonitrile (ABS), or the polymer of both formation, can be injection mo(u)lding or other suitable molding modes.The thickness of this backboard can design as required, and the thickness of the backboard of this embodiment is 1 ~ 3mm.Reflecting surface 100 is attached to a side of backboard.
In order to strengthen the radiating effect of LED lamp, described LED lamp is arranged on aluminum matrix 400, and this matrix can be various suitable shapes, for example strip.Because the LED lamp is arranged on the aluminum matrix, can reach the effect of very fast cooling, avoid this place's excess Temperature.This LED lamp can be one or two, and a side that has illustrated in Fig. 1 at backboard is provided with a LED lamp, can certainly also be provided with at the opposite side of backboard a LED lamp, thereby improves the brightness of light.When the both sides at backboard all are provided with LED, consisted of two long limits LED side light inlet, the light of this pair long limit LED side light inlet incides in display floater after through the reflecting surface reflection that attaches on the arc backboard, thus the use of saving LGP, reach and reduce costs, improve the purpose of yield.
As shown in Figure 2, be the structural representation of the backboard of a kind of embodiment of the utility model, this backboard comprises first surface and second having a slice reflecting surface 100 on the one side therein, and described reflecting surface comprises some sections concave surface arcs.The reflecting surface of this embodiment comprises nine sections concave surface arcs, is respectively the first concave surface arc 101, the second concave surface arc 102, the 3rd concave surface arc 103, the 4th concave surface arc 104, the 5th concave surface arc 105, the 6th concave surface arc 106, the 7th concave surface arc 107, the 8th concave surface arc 108, the 9th concave surface arc 109 and convex surface arc 110.
Wherein, the reflecting surface of first area comprises the first concave surface arc 101, the second concave surface arc 102, the 3rd concave surface arc 103, the curvature of the concave surface arc that this is regional becomes to increase gradually variation, the curvature of the 3rd concave surface arc 103 is greater than the curvature of the second concave surface arc 102, the curvature of the second concave surface arc 102 is greater than the curvature of the first concave surface arc 101, and the curvature of the concave surface arc of this first area increases gradually.The curvature K1 of the first concave surface arc 101 of this embodiment is that the curvature K2 of the 0.004 ~ 0.007, second concave surface arc 102 is that the curvature K3 of the 0.008 ~ 0.011, the 3rd concave surface arc 103 is 0.03 ~ 0.06.
The reflecting surface of second area comprises the 4th concave surface arc 104, the 5th concave surface arc 105, the 6th concave surface arc 106, the 7th concave surface arc 107, and the curvature of the concave surface arc that this is regional becomes to reduce gradually to change.The curvature K4 of the 4th concave surface arc 104 of this embodiment is that the curvature K5 of the 0.008 ~ 0.01, the 5th concave surface arc 105 is that the curvature K6 of the 0.005 ~ 0.007, the 6th concave surface arc 106 is that the curvature K7 of the 0.002 ~ 0.004, the 7th concave surface arc 107 is 0.0006 ~ 0.001, the 4th concave surface arc, the 5th concave surface arc, the 6th concave surface arc and the 7th concave surface arc form the second area of reflecting surface, and the curvature of the concave surface arc that this is regional reduces gradually.
The reflecting surface of second area comprises the 8th concave surface arc 108 and concave surface nine arcs 109, and described the 8th concave surface arc is connected with the 7th concave surface arc.The curvature K8 of the 8th concave surface arc 108 of this embodiment is that the curvature K9 of the 0.001 ~ 0.004, the 9th concave surface arc 109 is 0.001 ~ 0.003.Reflecting surface of the present utility model can reach even reflection with the light of incidence reflection face as far as possible by to the curvature setting of nine sections concave surface arcs, thereby the light of having realized entering display floater is even as far as possible.
The curvature of every section concave surface arc in the utility model embodiment can be certain value, and namely the arc of cambered surface is on circumference one section, and the curvature of cambered surface can be selected in above-mentioned scope.For the width of further termination surface, can realize carrying out better light reflection, preferably, the central angle alpha 1 of the first concave surface arc 101 is 2 ~ 4 degree; The central angle alpha 2 of the second concave surface arc 102 is 5 ~ 8 degree; The central angle alpha 3 of the 3rd concave surface arc 103 is 7 ~ 9 degree; The central angle alpha 4 of the 4th concave surface arc 104 is 8 ~ 11 degree; The central angle alpha 5 of the 5th concave surface arc 105 is 3 ~ 5 degree; The central angle alpha 6 of the 6th concave surface arc 106 is 3 ~ 6 degree; The central angle alpha 7 of the 7th concave surface arc 107 is 2 ~ 4 degree; The central angle alpha 8 of the 8th concave surface arc 108 is 2 ~ 4 degree; The central angle alpha 9 of the 9th concave surface arc 109 is 1 ~ 3 degree.
When the concave surface arc is circumference the preceding paragraph, can represent by the place radius of a circle, the radius of a circle R1 at the arc place of the first concave surface arc of this embodiment is 160mm ~ 180mm; The radius of a circle R2 at the arc place of the second concave surface arc is 110mm ~ 130mm; The arc place radius of a circle R3 of the 3rd concave surface arc is 20mm ~ 25mm; The radius of a circle R4 at the arc place of the 4th concave surface arc is 110mm ~ 120mm; The arc place radius of a circle R5 of the 5th concave surface arc is 160mm ~ 180mm; The arc place radius of a circle R6 of the 6th concave surface arc is 310mm ~ 330mm; The arc place radius of a circle R7 of the 7th concave surface arc is 1150mm ~ 1200mm; The arc place radius of a circle R8 of the 8th concave surface arc is 500mm ~ 520mm; The arc place radius of a circle R9 of the 9th concave surface arc is 690mm ~ 710mm.
For realize the multi-disc reflecting surface in conjunction with the time reflecting surface still can form uniform light, described reflecting surface also comprises one section convex surface arc 110, described convex surface arc is connected with the 9th concave surface arc.When having the multi-disc reflecting surface on backboard, there is the turning in the reflecting surface junction, can not form even reflection ray, adopts the convex surface arc when the junction of two reflectings surface and carries out combination, can avoid the appearance at turning.Preferably, the curvature K10 of described convex surface arc 110 is 0.004 ~ 0.007, and central angle alpha 10 is 4 ~ 7 degree.When the arc of this convex surface arc was certain value, this arc place radius of a circle R10 was 175mm ~ 195mm.
In the backboard of the another kind of embodiment of the utility model, have into axisymmetric the first reflecting surface and the second reflecting surface on the one side of backboard, every reflecting surface all comprises first area, second area and the 3rd zone, described first area, second area and the 3rd zone all are comprised of some sections concave surface arcs, the curvature of the concave surface arc of described first area increases gradually, the curvature of the concave surface arc of described second area reduces gradually, and the concave surface arc of described first area mean curvature maximum is connected with the concave surface arc of second area mean curvature maximum.Also be provided with one section convex surface arc on every reflecting surface, the convex surface arc on described the first reflecting surface is connected with convex surface arc on the second reflecting surface.In Fig. 2, nine sections concave surface arcs and one section convex surface arc are arranged on the first reflecting surface, the convex surface arc is provided with symmetry axis in the side away from the 9th concave surface arc, is provided with second reflecting surface symmetrical with this first reflecting surface at the opposite side of this symmetry axis.The backboard of this embodiment is provided with 20 sections cambered surfaces, comes the optical effect of accommodation reflex light by the curvature of 20 sections cambered surfaces, to reach the even of reflection ray.
The utility model also provides a kind of backlight, comprise backboard and the light source 200 that is arranged on backboard one side, this light source is the LED lamp, one side of this embodiment backboard is provided with a slice reflecting surface at least, described reflecting surface comprises first area and second area, described first area and second area all are comprised of some sections concave surface arcs, the curvature of the concave surface arc of described first area increases gradually, the curvature of the concave surface arc of described second area reduces gradually, and the concave surface arc of described first area mean curvature maximum is connected with the concave surface arc of second area mean curvature maximum.This LED lamp is arranged on a side of close first area on reflecting surface, because the curvature of first area is larger, makes incident ray have upwards larger inclination angle, is easier to form uniform light.When this backlight comprised the reflecting surface of two symmetries, a LED lamp was arranged on a side of close first area on the first reflecting surface, and the 2nd LED lamp also is arranged on a side of close first area on the second reflecting surface.
Backboard of the present utility model can be applied to the display of various sizes, and the backboard of this embodiment is tested on the 32inch product, and more than the mean flow rate of backlight can reach 5000nit, 9 all once more than 80%.Be the intensity map of central distribution line of the backlight test of a kind of embodiment of the utility model as Fig. 3, as can be seen from the figure, adopt the brightness of backlight test of this backboard comparatively even, mean flow rate reaches 5000nit.As shown in Figure 4, for 9 brightness distribution maps that the backlight of a kind of embodiment of the utility model is tested, can find out on scheming, 9 of this backlight all once reached more than 80%.Actual test result by sample can find out, this structure can reach good optical effect, and cost has substantial degradation again than traditional backlight source structure, so the backlight of this structure has good competitiveness, is worthy to be popularized.
Use technique scheme, the LGP of backlight is replaced with backboard, the reflecting surface that utilizes backboard upper recess surface arc to form reflexes to source light on display floater, first increases because reflecting surface comprises curvature the concave surface arc that subtracts afterwards variation, makes the light that light source sends be reflected into light comparatively uniformly.Display unit of the present utility model utilizes backboard to substitute LGP, thereby greatly reduces production cost.
The above is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. backboard that is used for backlight, it is characterized in that, described backboard comprises first surface and second, wherein has the reflecting surface that comprises first area and second area on the one side, described first area reflecting surface and second area reflecting surface all are comprised of some sections concave surface arcs, the curvature of the concave surface arc of described first area reflecting surface increases gradually, the curvature of the concave surface arc of described second area reflecting surface reduces gradually, and the concave surface arc of described first area reflecting surface mean curvature maximum is connected with the concave surface arc of second area reflecting surface mean curvature maximum.
2. backboard according to claim 1, is characterized in that, described first area reflecting surface comprises the first concave surface arc, the second concave surface arc and the 3rd concave surface arc, and its curvature is respectively 0.004～0.007,0.008～0.011,0.03～0.06;
Described second area reflecting surface comprises the 4th concave surface arc, the 5th concave surface arc, the 6th concave surface arc and the 7th concave surface arc, and its curvature is respectively 0.008～0.01,0.005～0.007,0.002～0.004,0.0006～0.001.
3. backboard according to claim 2, is characterized in that, the central angle alpha 1 of described the first concave surface arc is 2～4 degree; The central angle alpha 2 of the second concave surface arc is 5～8 degree; The central angle alpha 3 of the 3rd concave surface arc is 7～9 degree; The central angle alpha 4 of the 4th concave surface arc is 8～11 degree; The central angle alpha 5 of the 5th concave surface arc is 3～5 degree; The central angle alpha 6 of the 6th concave surface arc is 3～6 degree; The central angle alpha 7 of the 7th concave surface arc is 2～4 degree.
4. backboard according to claim 3, it is characterized in that, described reflecting surface also comprises the 3rd zone, described the 3rd regional reflex face comprises the 8th concave surface arc and the 9th concave surface arc, its curvature is respectively 0.001～0.004,0.001～0.003, and described the 8th concave surface arc is connected with the 7th concave surface arc.
5. backboard according to claim 4, is characterized in that, the central angle alpha 8 of described the 8th concave surface arc is 2～4 degree; The central angle alpha 9 of the 9th concave surface arc is 1～3 degree.
6. backboard according to claim 4, is characterized in that, described reflecting surface also comprises one section convex surface arc, and described convex surface arc is connected with the 9th concave surface arc, and the curvature of described convex surface arc is 0.004～0.007, and the central angle alpha 10 of described convex surface arc is 4～7 degree.
7. backboard according to claim 6, it is characterized in that, have two on the one side of described backboard and become axisymmetric the first reflecting surface and the second reflecting surface, every reflecting surface all comprises the first area, second area and the 3rd zone, described first area, second area and the 3rd zone all are comprised of some sections concave surface arcs, the curvature of the concave surface arc of described first area reflecting surface increases gradually, the curvature of the concave surface arc of described second area reflecting surface reduces gradually, the concave surface arc of described first area reflecting surface mean curvature maximum is connected with the concave surface arc of second area reflecting surface mean curvature maximum.
8. a backlight, is characterized in that, comprises backboard as described in any one in claim 1-7 and the LED lamp that is arranged on backboard one side.
9. backlight according to claim 8, is characterized in that, described LED lamp is arranged on a side of close first area on reflecting surface.
10. a display unit, is characterized in that, comprises backlight as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206949399U CN202972973U (en) | 2012-12-14 | 2012-12-14 | Back plate used for backlight, backlight and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206949399U CN202972973U (en) | 2012-12-14 | 2012-12-14 | Back plate used for backlight, backlight and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202972973U true CN202972973U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206949399U Expired - Lifetime CN202972973U (en) | 2012-12-14 | 2012-12-14 | Back plate used for backlight, backlight and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202972973U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032836A (en) * | 2012-12-14 | 2013-04-10 | 京东方科技集团股份有限公司 | Back plate for backlights, backlight and display device |
| CN107884993A (en) * | 2017-10-24 | 2018-04-06 | 友达光电股份有限公司 | Backlight module and display device comprising same |
-
2012
- 2012-12-14 CN CN2012206949399U patent/CN202972973U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032836A (en) * | 2012-12-14 | 2013-04-10 | 京东方科技集团股份有限公司 | Back plate for backlights, backlight and display device |
| CN103032836B (en) * | 2012-12-14 | 2015-07-29 | 京东方科技集团股份有限公司 | A kind of backboard for backlight, backlight and display unit |
| US9285517B2 (en) | 2012-12-14 | 2016-03-15 | Boe Technology Group Co., Ltd. | Back cover for backlight source, backlight source, and display apparatus |
| CN107884993A (en) * | 2017-10-24 | 2018-04-06 | 友达光电股份有限公司 | Backlight module and display device comprising same |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
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| CX01 | Expiry of patent term |