CN202691788U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN202691788U CN202691788U CN2012203147343U CN201220314734U CN202691788U CN 202691788 U CN202691788 U CN 202691788U CN 2012203147343 U CN2012203147343 U CN 2012203147343U CN 201220314734 U CN201220314734 U CN 201220314734U CN 202691788 U CN202691788 U CN 202691788U
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- spheroid
- backlight module
- light emitting
- emitting source
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Abstract
The utility model discloses a backlight module. The backlight module comprises a back board, a reflection board, at least one lamp strip and a diffusion board, wherein the reflection board is arranged at the upper surface of the back board; the lamp strip is fixedly arranged on the reflection board; the diffusion board is opposite to a light emitting source on the lamp strip; the surface of the diffusion board, which corresponds to the light emitting source, is provided with a segment body corresponding to the light emitting source; and the height of the segment body is less than or equal to the radius of the segment body. The backlight module has the advantages that the backlight module is provided with the segment body at the position corresponding to the diffusion board and the light emitting source, and the light emergent angle of the light emitting source can be enlarged without needing a lens, so that the lens of the traditional backlight module is omitted, the structure of the backlight module is simplified, and the cost is reduced; and in addition, due to the structure of the segment body, the diffuse reflection of the light can be increased, and multiple reflection is formed by light between the back board and the diffusion board, so that the brightness uniformity is improved and the image quality is improved.
Description
Technical field
The utility model relates to the display screen field, particularly relates to a kind of backlight module and display unit.
Background technology
The conventional diffusion plate has dull and stereotyped diffuser plate (as shown in Figure 1), surface band just like the diffuser plate (as shown in Figure 2) of the micro-structurals such as wedge or the diffuser plate of diffusion particle coating etc.But the down straight aphototropism mode set structure is comparatively complicated, wherein except with the diffuser plate, also needs so that manufacturing technique requirent is high, to cause overall cost higher with diffusion sheet, brightening piece, with the parts such as LED lamp bar of lens.In addition, traditional direct-light type LED backlight module, because the lamp bar is arranged in parallel, LED lamp position is the brightest, and is partially dark between the lamp bar, so can form bright band and yellowish leukorrhea, causes the image quality heterogeneity, affects image quality.
The utility model content
Based on this, being necessary provides the backlight module that a kind of back structure is simple, cost is low for complicated, the overall high problem of cost of back light module unit structure.
In addition, also provide a kind of display unit.
A kind of backlight module, comprise backboard, be arranged on the reflecting plate of described backboard upper surface, the diffuser plate that is fixedly installed at least one lamp bar on the described reflecting plate, is oppositely arranged with light emitting source on the described lamp bar, the surface that described diffuser plate is corresponding with described light emitting source is provided with the spheroid corresponding with described light emitting source, the height of wherein said spheroid less than/equal the radius of described spheroid.
Among embodiment, described diffuser plate comprises substrate and is provided with the spheroid member of described spheroid that described substrate and described light emitting source relative position offer for the through hole of fixing described spheroid member therein.
Therein among embodiment, described through hole is shoulder hole, aperture ratio near described light emitting source is little away from the aperture of described light emitting source, the bottom surface diameter of described spheroid equates that with the aperture of described through hole near described light emitting source the width of described spheroid member upper end equals the aperture away from the through hole of described light emitting source.
Among embodiment, described spheroid member is affixed on described substrate by the optics sticker therein.
Among embodiment, described substrate and described spheroid member are one-body molded therein.
Among embodiment, the radius R of described spheroid, described spheroid height H and described spheroid bottom surface radius r satisfy following relation: R=2H, r=1.73H therein.
Therein among embodiment, described H greater than/equal 25 millimeters, described spheroid prepares gained by transparent material.
Among embodiment, described H is less than 25 millimeters therein, and described spheroid surface scribbles the reflecting layer.
Among embodiment, it is characterized in that therein, described substrate thickness greater than/equal 2 millimeters.
A kind of display unit, comprise framework and drive circuit, backlight module, described backlight module is electrically connected with described drive circuit, described backlight module comprises backboard, be arranged on the reflecting plate of described backboard upper surface, the diffuser plate that is fixedly installed at least one lamp bar on the described reflecting plate, is oppositely arranged with light emitting source on the described lamp bar, the surface that described diffuser plate is corresponding with described light emitting source is provided with the spheroid corresponding with described light emitting source, the height of wherein said spheroid less than/equal the radius of described spheroid.
Backlight module in the utility model is by arranging spheroid at diffuser plate with the corresponding position of light emitting source, need not scioptics and can increase the beam projecting angle of light emitting source, save the lens of traditional backlight module, simplified the structure of backlight module, reduced cost.In addition, this spheroid structure can increase the diffuse reflection of light, thereby brightness uniformity improves so that light forms Multi reflection between backboard and diffuser plate, improves image quality.
Moreover backlight module is equivalent to position directly over light emitting source and does thickening and process in that spheroid is set directly over the light emitting source, and its thickness is according to therefrom successively decreasing at the mind-set edge with the distance of light emitting source, and the center thick rim is thin.A little less than the screening effect of the screening effect at light emitting source center than the edge, so that the printing opacity homogeneous of diffuser plate, image quality uniformity improve.
Description of drawings
Fig. 1 is the schematic diagram of a traditional dull and stereotyped diffuser plate;
Fig. 2 is a traditional diffuser plate schematic diagram with micro-structurals such as wedges;
Fig. 3 is the light transmission schematic diagram of the backlight module of preferred embodiment of the present utility model;
Fig. 4 is the sphere size schematic diagram of the backlight module of preferred embodiment of the present utility model;
Fig. 5 is the exploded perspective view of the backlight module of preferred embodiment of the present utility model;
Fig. 6 is the structural representation of the backlight module of preferred embodiment of the present utility model.
The specific embodiment
As shown in Figure 3, be a kind of backlight module that an embodiment provides, comprise backboard 100, lamp bar (figure is mark not) and diffuser plate 300.
Particularly, each lamp bar is provided with a plurality of light emitting sources 200, and a plurality of light emitting sources 200 on each lamp bar evenly are spaced.Diffuser plate 300 surface relative with the lamp bar forms spheroid 302 corresponding with light emitting source 200 positions and that protrude to light source 200, and the height H of spheroid 302 less than the/arc radius R(that equals spheroid 302 as shown in Figure 4).Particularly, the upper surface of described backboard 100 posts the reflecting plate (not shown), described lamp bar is fixed on the described reflecting plate, described reflecting plate is used for the light that reflection reflects from diffuser plate 300, wherein, the quantity of described lamp bar can be decided as required, and when described lamp bar was a plurality of, described a plurality of lamp bars interval was fixed on the described reflecting plate.
Backlight module is by being convexly equipped with spheroid 302 at diffuser plate 300 with the corresponding position of light emitting source 200, spheroid 302 can increase the lighting angle of light emitting source 200, the lens of traditional backlight module have been saved, and because the nonreentrant surface of described spheroid 302 faces described light emitting source 200, so the light that goes back from described nonreentrant surface emission is more, therefore increased the diffuse reflection of light, so that thereby light forms Multi reflection (shown in light c among Fig. 3) 300 of reflecting plate and diffuser plates so that brightness uniformity improves, has reduced overall cost.
In addition, backlight module is equivalent to position directly over light emitting source 200 and does thickening and process in that spheroid 302 is set directly over the light emitting source 200, and its thickness is according to therefrom successively decreasing at the mind-set edge with the distance (light intensity) of light emitting source 200, and the center thick rim is thin.The screening effect at light emitting source 200 centers can strengthen, and the screening effect at edge weakens, so that the printing opacity homogeneous of diffuser plate 300, image quality uniformity improve.
In a preferred embodiment, light emitting source 200 employing light emitting angers are 60 ° LED lamp, and with reference to figure 4, the radius R of spheroid 302, spheroid 302 height H and spheroid 302 bottom surface radius r satisfy following relation: R=2H, r=1.73H so.H is spheroid 302 height (being light mixing distance), and namely spheroid 302 is from the height of diffuser plate 300 protrusions, and r is the bottom surface radius of spheroid.In other embodiments, light emitting source 200 can be other luminescent devices commonly used etc.
In a preferred embodiment, shown in Fig. 5,6, diffuser plate 300 comprises substrate 320 and is provided with the spheroid member 340 of spheroid 302, and substrate 320 and light emitting source 200 relative positions offer for the fixing through hole 322 of spheroid member 340.Substrate 320 thickness are preferably 188 polypropylene plastics more than or equal to 2 millimeters, also can be 189 polyacrylate plastics etc.Preferably, spheroid member 340 is PET(Polyethylene terephthalate, poly terephthalic acid class plastics) material makes, and perhaps uses other transparent high temperature resistant materials to get final product.
At diffuser plate 300 spheroid 302 is set and is conducive to the slimming of direct-light type LED backlight module.Satisfying relational expression: R=2H, under the prerequisite of r=1.73H, the radius R that changes spheroid 302 cooperates the variation of light mixing distance H, can solve because of being direct-light type LED backlight module and so that light mixing distance H increase causes the blocked up problem of backlight module integral thickness.In addition, because the well-balanced property of the brightness raising of illuminating module has solved original because diffuser plate 300 need to be used the problem that multi-disc diffuser plate 300 is used for covering greatly over against the position brightness of light emitting source 200.
In addition, when light during from the surface of described spheroid 302 to the centre of sphere direction outgoing of described spheroid 302, according to refraction principle as can be known, this spheroid 302 can increase the shooting angle of light emitting source 200, therefore need not additionally to increase lens increases shooting angle, simplify the structure of backlight module, reduced to a certain extent cost.In addition, because when light is mapped to described spheroid 302 surperficial, more light can be reflected back, therefore strengthened the diffuse reflection of light, so that brightness is more even, and need not to reduce with brightening piece the uneven homogenize of light, and therefore can in the inhomogeneity situation that improves brightness, simplify the structure, reduced cost.
As shown in Figure 5, through hole 322 is shoulder hole, and is little away from the aperture of light emitting source 200 near the aperture ratio of light emitting source 200, and described through hole 322 is that the upper end is large, the through hole that the lower end is little, and namely close light emitting source 200 places is small through hole, away from light emitting source 200 places is large through-hole.The bottom surface diameter of spheroid 302 equates with the aperture of through hole 322 near light emitting source 200 places, and the upper end width of described spheroid member 340 equals the aperture of described through hole 322 upper ends, therefore, described spheroid 302 can pass through hole 322, the upper end of this spheroid member 340 just is stuck in the separation place, top and bottom of described through hole 322, and then fixing described spheroid 302.Spheroid member 340 is affixed on substrate 320 by optics sticker 360, the quantity of optics sticker 360 can be decided according to the quantity of light emitting source 200, in the present embodiment, light emitting source 200 is preferably three, and described optics sticker 360 also is preferably three, and optics sticker 360 is distributed in the bottom surface circumference of spheroid 302 evenly and at intervals.In other embodiments, optics sticker 360 can be two, four other quantity.
Perhaps, in another preferred embodiment, substrate 320 can one-body molded formation diffuser plate 300 with the spheroid member 340 that is provided with spheroid 302.And in other embodiments, through hole 322 is large away from the aperture of light emitting source 200 near the aperture ratio of light emitting source 200, perhaps guaranteeing that spheroid member 340 can be fixed under the prerequisite of substrate 320 and light emitting source 200 correspondence positions, do not limit the fixed form of spheroid member 340 on substrate 320, as the engaging etc.
The backlight module that present embodiment provides arranges spheroid 302 and is equivalent to diffuser plate 300 and does thickening and process directly over light emitting source 200, its thickness is according to therefrom successively decreasing at the mind-set edge with the distance of light emitting source 200, and the center thick rim is thin.A little less than the screening effect of screening effect than the edge of spheroid 302 light emitting sources 200 center relative positions, so that the printing opacity homogeneous of diffuser plate 300, image quality uniformity improve.
In a preferred embodiment, light mixing distance H greater than/equal 25 millimeters, available transparent material prepares spheroid 302, to increase the light transmission of spheroid 302; And during less than 25 millimeters, at spheroid 302 surface-coateds the reflecting layer is arranged at light mixing distance H, and wherein said reflecting layer is comprised of reflective particle, and the reflectivity of light can be improved in this reflecting layer, increases to a certain extent optics mist degree and covering property, improves screening effect.
The invention also discloses a kind of display unit, it comprises the described backlight module of framework, drive circuit and above-described embodiment, and backlight module is electrically connected with drive circuit.The structure of backlight module be function as mentioned above, repeat no more here.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. backlight module, comprise backboard, be arranged on the reflecting plate of described backboard upper surface, the diffuser plate that is fixedly installed at least one lamp bar on the described reflecting plate, is oppositely arranged with light emitting source on the described lamp bar, it is characterized in that, the surface that described diffuser plate is corresponding with described light emitting source is provided with the spheroid corresponding with described light emitting source, the height of wherein said spheroid less than/equal the radius of described spheroid.
2. backlight module according to claim 1 is characterized in that, described diffuser plate comprises substrate and be provided with the spheroid member of described spheroid that described substrate and described light emitting source relative position offer the through hole for fixing described spheroid member.
3. backlight module according to claim 2, it is characterized in that, described through hole is shoulder hole, aperture ratio near described light emitting source is little away from the aperture of described light emitting source, the bottom surface diameter of described spheroid equates that with the aperture of described through hole near described light emitting source the width of described spheroid member upper end equals the aperture away from the through hole of described light emitting source.
4. according to claim 2 or 3 described backlight modules, it is characterized in that described spheroid member is affixed on described substrate by the optics sticker.
5. backlight module according to claim 2 is characterized in that, described substrate and described spheroid member are one-body molded.
6. backlight module according to claim 2 is characterized in that, the radius R of described spheroid, described spheroid height H and described spheroid bottom surface radius r satisfy following relation: R=2H, r=1.73H.
7. backlight module according to claim 6 is characterized in that, described H greater than/equal 25 millimeters, described spheroid prepares gained by transparent material.
8. backlight module according to claim 6 is characterized in that, described H is less than 25 millimeters, and described spheroid surface scribbles the reflecting layer.
9. backlight module according to claim 2 is characterized in that, described substrate thickness greater than/equal 2 millimeters.
10. a display unit comprises framework and drive circuit, it is characterized in that, comprises that also described backlight module is electrically connected with described drive circuit such as each described backlight module in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203147343U CN202691788U (en) | 2012-06-29 | 2012-06-29 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203147343U CN202691788U (en) | 2012-06-29 | 2012-06-29 | Backlight module and display device |
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| Publication Number | Publication Date |
|---|---|
| CN202691788U true CN202691788U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203147343U Expired - Fee Related CN202691788U (en) | 2012-06-29 | 2012-06-29 | Backlight module and display device |
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| CN (1) | CN202691788U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439857A (en) * | 2013-02-22 | 2013-12-11 | 杭州能基科技有限公司 | Method and device for converting laser into lighting source |
-
2012
- 2012-06-29 CN CN2012203147343U patent/CN202691788U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439857A (en) * | 2013-02-22 | 2013-12-11 | 杭州能基科技有限公司 | Method and device for converting laser into lighting source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20170629 |
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| CF01 | Termination of patent right due to non-payment of annual fee |