CN204347285U - Prism diaphragm, curved surface backlight and display device - Google Patents
Prism diaphragm, curved surface backlight and display device Download PDFInfo
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- CN204347285U CN204347285U CN201520006534.5U CN201520006534U CN204347285U CN 204347285 U CN204347285 U CN 204347285U CN 201520006534 U CN201520006534 U CN 201520006534U CN 204347285 U CN204347285 U CN 204347285U
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Abstract
The utility model discloses a kind of prism diaphragm, curved surface backlight and display device.Described prism diaphragm comprises: substrate and become multiple prism unit of array arrangement on the substrate, each prism unit has leg-of-mutton xsect, described xsect has the first base angle and the second base angle, first base angle and the second base angle are all positioned at the side of described xsect near substrate, first base angle of the triangular cross section of at least one in wherein said multiple prism unit and the second base angle vary in size and adopt according to the prism diaphragm of embodiment of the present utility model, curved surface backlight and display device, the homogeneity of the brightness of emergent light can be improved, increase visual angle, improve visual effect.
Description
Technical field
The utility model relates to display field, particularly relates to a kind of prism diaphragm, a kind of curved surface backlight and a kind of display device.
Background technology
In a display device, in order to make the light uniformization from backlight outgoing, often on the exiting surface of light guide plate or diffuser plate, be provided with prism diaphragm.On existing prism diaphragm, all angles of each prism unit are all identical.When this prism diaphragm is applied to curved surface backlight, it can make emergent light towards the center convergence of viewing area, as shown in Figure 1, so the luminance viewing angle of emergent light can diminish, affects visual effect.Along with the development of curved face type display device, the application of curved surface backlight is also more and more extensive, therefore, needs a kind of prism diaphragm that can be adapted to curved surface backlight.
Utility model content
The purpose of this utility model is to provide a kind of prism diaphragm, and it can improve the luminance viewing angle of curved surface backlight, strengthens display effect.
The purpose of this utility model is also to provide a kind of the curved surface backlight and the display device that comprise above-mentioned prism diaphragm.
In order to realize above-mentioned utility model object, the technical solution of the utility model realizes in the following manner:
Embodiment of the present utility model provides a kind of prism diaphragm, comprising:
Substrate,
Substrate becomes multiple prism unit of array arrangement, and each prism unit has leg-of-mutton xsect, and described xsect has the first base angle and the second base angle, and the first base angle and the second base angle are all positioned at the side of described xsect near substrate,
First base angle and second base angle of the triangular cross section of at least one in wherein said multiple prism unit vary in size.
In one embodiment, described multiple prism unit is along first direction array arrangement, described first direction is perpendicular to the axis of each prism, and described first base angle of triangular cross section in each prism unit is all towards described first direction, and described second base angle of triangular cross section in each prism unit is all towards second direction opposite to the first direction.
In one embodiment, the size at the first base angle in each prism unit and the ratio of the size at the second base angle increase successively along first direction or reduce.
In one embodiment, the size at the first base angle in each prism unit to increase and the size at the second base angle reduces successively along first direction successively along first direction.
In one embodiment, the size towards the first base angle in each prism unit on the side of first direction of prism unit placed in the middle on prism diaphragm is equal with the ratio of the size at the second base angle, and/or the size towards the first base angle in each prism unit on the side of second direction of prism unit placed in the middle on prism diaphragm is equal with the ratio of the size at the second base angle.
In one embodiment, the first base angle of prism unit placed in the middle on prism diaphragm and the second base angle equal and opposite in direction.
In one embodiment, the size at the first base angle of described prism unit and the size at the second base angle are all in the scope of 10 degree to 80 degree.
In one embodiment, described substrate and prism unit are integrally formed or are independently formed.
Embodiment of the present utility model also provides a kind of curved surface backlight, comprising:
Prism diaphragm as described in above-mentioned any embodiment.
In one embodiment, described curved surface backlight also comprises:
Curved surface light guide plate, described curved surface light guide plate has incidence surface and exiting surface, and described prism diaphragm is arranged on described exiting surface;
Light source, the light that described light source sends injects curved surface light guide plate from the incidence surface being positioned at light guide plate side, and each prism unit in described prism diaphragm injects the direction arrangement of curved surface light guide plate along described light,
Wherein, the size at the first base angle in each prism unit and the ratio of the size at the second base angle depend on the curvature of described curved surface light guide plate and determine.
In one embodiment, described curved surface backlight also comprises:
Curved surface diffuser plate, described curved surface diffuser plate has incidence surface and exiting surface, and described prism diaphragm is arranged on described exiting surface;
Light source, the light that described light source sends injects curved surface diffuser plate from the incidence surface being positioned at curved surface diffuser plate bottom surface, and each prism unit in described prism diaphragm is arranged along with the direction that described light injects the direction of curved surface diffuser plate vertical,
Wherein, the size at the first base angle in each prism unit and the ratio of the size at the second base angle depend on the curvature of described curved surface diffuser plate and determine.
Of the present utility modelly embodiment still provides a kind of display device, comprise as the prism diaphragm before as described in any embodiment or as the curved surface backlight before as described in any embodiment.
At least one aspect in technique scheme of the present utility model can be compensated by the convergence effect of the bending emergent light caused of light guide plate in curved surface backlight or diffuser plate by the design of the prism unit of asymmetric.Adopt the prism diaphragm according to embodiment of the present utility model, curved surface backlight and display device, the homogeneity of the brightness of emergent light can be improved, increase visual angle, improve visual effect.
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram of the prism diaphragm be arranged in curved surface backlight of the prior art;
Fig. 2 illustrates that the prism diaphragm according to an embodiment of the present utility model is in the schematic diagram of horizontal positioned state;
Fig. 3 illustrates schematic diagram when being arranged in curved surface backlight according to the prism diaphragm of an embodiment of the present utility model;
Fig. 4 a illustrates the schematic diagram of the travel path in light path prism diaphragm in the prior art; With
Fig. 4 b illustrates that light path is at the schematic diagram according to the travel path in the prism diaphragm of an embodiment of the present utility model.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.In the description, same or analogous drawing reference numeral represents same or analogous parts.The explanation of following reference accompanying drawing to the utility model embodiment is intended to make an explanation to overall utility model design of the present utility model, and not should be understood to one restriction of the present utility model.
Fig. 2 and Fig. 3 schematically shows the prism diaphragm 200 according to an embodiment of the present utility model.This prism diaphragm 200 comprises: substrate 206 and become multiple prism unit 201 of array arrangement in substrate 206, each prism unit 201 has leg-of-mutton xsect, described xsect has the first base angle 1 and the second base angle 2 (such as also can have drift angle), and the first base angle 1 and the second base angle 2 are all positioned at the side of described xsect near substrate 206.First base angle 1 and second base angle 2 of the leg-of-mutton xsect of at least one the prism unit 201 in described multiple prism unit 201 vary in size.
Review the prism diaphragm 100 of the prior art shown in Fig. 1, each prism unit 101 in this prism diaphragm 100 all adopts same xsect symmetric design (namely two base angles etc. are large), and prism diaphragm 100 will inevitably bend when being assembled in curved surface backlight thereupon, which results in for each prism unit 101, actual smooth incident direction is not identical, due to the same xsect symmetric design of each prism unit 101, so the light exit direction of reality also can be different, the situation from both sides to bent intermediate of the prism diaphragm 100 shown in Fig. 1, light exit direction can converge to the center position of viewing area.
As previously mentioned, according in the prism diaphragm 200 of embodiment of the present utility model, prism unit 201 have employed xsect asymmetric design, namely two base angles in xsect are not etc., this is compared to prism unit 101 of the prior art, emergent light can be made to produce certain deflection, thus compensate the impact of curved surface backlight for prism diaphragm.
Exemplarily, Fig. 4 a and Fig. 4 b to respectively illustrate in light prism diaphragm 100 in the prior art and according to the travel path (as shown by arrows in FIG.) in the prism diaphragm 200 of embodiment of the present utility model.See Fig. 4 a and Fig. 4 b, according to refraction principle, what adopt asymmetric design can make emergent light deflection angle θ according to the prism diaphragm 200 of embodiment of the present utility model compared with prism diaphragm 100 of the prior art, and this can compensate the deflection when prism diaphragm is applied in curved surface backlight due to the bending emergent light caused of light guide plate or diffuser plate.By arranging the first suitable base angle 1 and the second base angle 2, emergent light can be made with the direction outgoing expected, such as, along the direction outgoing perpendicular to viewing area.
It should be noted that, although the incident direction of incident light shown in Fig. 2 and Fig. 3 is substantially vertical with the prism diaphragm 200 during horizontal positioned, such as, but this just schematically, and the incident direction of incident light is not limited thereto, and can become arbitrary angle of inclination with the incidence surface of prism diaphragm 200.
In addition, according in the prism diaphragm 200 of embodiment of the present utility model, can be that each prism unit 201 is asymmetric design, namely the xsect of each prism unit 201 all has the first base angle 1 and the second base angle 2 differed in size; Such as, but also can be that wherein a part of prism unit 201 is designed to asymmetrical, the prism unit 201 such as, three, five, ten be designed to asymmetrical.This is because, in practice, light guide plate in curved surface backlight or the design of diffuser plate also can be diversified, such as, light guide plate or diffuser plate can be overall with consistent curvature bending, with consistent curvature local bending, or or even on the respective sections with different curvature bendings.
In one example, multiple prism unit 201 can along first direction (such as direction as shown by the arrows in Figure 2, edge) array arrangement, described first direction is perpendicular to the axis of each prism, and the first base angle 1 of triangular cross section in each prism unit 301 is all towards described first direction, and the second base angle 2 of triangular cross section in each prism unit 301 is all towards second direction opposite to the first direction.
It should be noted that, although the first direction shown in Fig. 2 is direction left, this is only schematic, and the restriction not to first direction, such as, first direction also can be the direction to the right in Fig. 2.
Exemplarily, the first base angle 1 in each prism unit 201 and the size of the second base angle 2 can be determined according to the light guide plate in curved surface backlight or the curvature of diffuser plate reality and the design direction of incident light.Such as, the ratio of the size of the first base angle 1 in each prism unit 201 and the size of the second base angle 2 can be arranged to increase successively along first direction or reduce.Exemplarily, the first base angle 1 in each prism unit 201 can increase successively along first direction and the size of the second base angle 2 reduces successively along first direction.Such as, as shown in Figures 2 and 3, the size of the first base angle 1 in each prism unit 201 reduces from left to right successively, and the size of the second base angle 2 increases from left to right successively, thus, the ratio of the size of the first base angle 1 and the size of the second base angle 2 reduces successively from left to right or increases successively from right to left.This can compensate emergent light direction according to the inclined degree of the prism unit 201 on the diverse location in curved surface backlight better.In another example, also can the size towards the first base angle 1 in each prism unit 301 on the side of first direction of prism unit placed in the middle on prism diaphragm be arranged to equal with the ratio of the size of the second base angle 2, and/or the size towards the first base angle 1 in each prism unit 301 on the side of second direction of prism unit placed in the middle on prism diaphragm is arranged to equal with the ratio of the size of the second base angle 2.This can improve the processibility of prism diaphragm.
Exemplarily, some the prism unit 201 on prism diaphragm 200 can have symmetric design, i.e. the first base angle 1 and the second base angle 2 equal and opposite in direction.Although this is because light guide plate or diffuser plate are bending in curved surface backlight, the exit direction of the light of also not necessarily all prism unit 201 outgoing all can be changed.Such as, the first base angle 1 and the second base angle 2 equal and opposite in direction of prism unit 201 placed in the middle on prism diaphragm 200, as shown in Figures 2 and 3.This can ensure that, when prism diaphragm 200 is arranged in curved surface backlight, emergent light is guided into the center of viewing area by prism unit 201 placed in the middle.
Exemplarily, the size of the first base angle 1 and the size of the second base angle 2 all can in the scopes of 10 degree to 80 degree, such as, in the scope of 30 degree to 60 degree.But the size of the first base angle 1 and the size of the second base angle 2 are not limited thereto, it can be got according to designing requirement and be greater than 0 degree of any number be less than between 90 degree.If the light guide plate in curved surface backlight or the curvature of diffuser plate are very large, the first base angle 1 in some prism unit 201 and the value of the second base angle 2 also more than 90 degree, but can be less than 180 degree.
Exemplarily, in the prism diaphragm 200 of embodiment of the present utility model, substrate 206 can be integrally formed with prism unit 201, also can be formed with prism unit 201 is independent, such as, with together with adhesive bonds after substrate 206 can be formed respectively with prism unit 201.The setting of this substrate 206, can make prism unit 201 obtain more stable support.
Of the present utility modelly embodiment still provides a kind of curved surface backlight, this curved surface backlight comprises the prism diaphragm 200 as described in above-mentioned any embodiment.Exemplarily, this curved surface backlight can be side incident-type curved surface backlight, and this curved surface backlight can comprise: curved surface light guide plate, and described curved surface light guide plate has incidence surface and exiting surface, and described prism diaphragm is arranged on described exiting surface; Light source, the light that described light source sends injects curved surface light guide plate from the incidence surface being positioned at light guide plate side, and each prism unit in described prism diaphragm injects the direction arrangement of curved surface light guide plate along described light.The ratio (i.e. asymmetric degree) of the size of the first base angle 1 in each prism unit 301 and the size of the second base angle 2 depends on the curvature of described curved surface light guide plate and determines.
In another example, this curved surface backlight also can be straight-down negative curved surface backlight, and this curved surface backlight can comprise: curved surface diffuser plate, and described curved surface diffuser plate has incidence surface and exiting surface, and described prism diaphragm is arranged on described exiting surface; Light source, the light that described light source sends injects curved surface diffuser plate from the incidence surface being positioned at curved surface diffuser plate bottom surface, each prism unit in described prism diaphragm is arranged along with the direction that described light injects the direction of curved surface diffuser plate vertical, wherein, the ratio of the size of the first base angle 1 in each prism unit 301 and the size of the second base angle 2 depends on the curvature of described curved surface diffuser plate and determines.
In the examples described above, prism diaphragm 200 can be improved for the adaptability of the degree of crook of curved surface backlight, with better by the brightness uniformity of emergent light.Exemplarily, the size of the first base angle 1 and the size of the second base angle 2 itself also can be determined according to the curvature of the light guide plate in curved surface backlight or diffuser plate.
In the examples described above, prism diaphragm is positioned at the exiting surface of described light guide plate or diffuser plate.Alternatively, exemplarily, prism diaphragm 200 also can be positioned at the incidence surface of described light guide plate or diffuser plate.
Embodiment of the present utility model also provides a kind of display device, and it comprises the prism diaphragm 200 as described in above-mentioned any embodiment or the curved surface backlight as described in above-mentioned any embodiment.
By means of the prism diaphragm according to embodiment of the present utility model, backlight and display device, the homogeneity of the brightness of emergent light can be improved, increase visual angle, improve visual effect.
Although be illustrated the utility model by reference to the accompanying drawings, embodiment disclosed in accompanying drawing is intended to carry out exemplary illustration to the utility model preferred implementation, and can not be interpreted as one restriction of the present utility model.
Although some embodiments of the utility model general plotting have been shown and explanation, those skilled in the art will appreciate that, when not deviating from principle and the spirit of this overall utility model design, can make a change these embodiments, scope of the present utility model is with claim and their equivalents.
Claims (12)
1. a prism diaphragm, is characterized in that, this prism diaphragm comprises:
Substrate,
Become multiple prism unit of array arrangement on the substrate, each prism unit has leg-of-mutton xsect, and described xsect has the first base angle and the second base angle, and the first base angle and the second base angle are all positioned at the side of described xsect near substrate,
First base angle and second base angle of the triangular cross section of at least one in wherein said multiple prism unit vary in size.
2. prism diaphragm according to claim 1, it is characterized in that, described multiple prism unit is along first direction array arrangement, described first direction is perpendicular to the axis of each prism, and described first base angle of triangular cross section in each prism unit is all towards described first direction, and described second base angle of triangular cross section in each prism unit is all towards second direction opposite to the first direction.
3. prism diaphragm according to claim 2, is characterized in that, the ratio of the size at the first base angle in each prism unit and the size at the second base angle increases successively along first direction or reduces.
4. prism diaphragm according to claim 2, is characterized in that, the size at the first base angle in each prism unit to increase and the size at the second base angle reduces successively along first direction successively along first direction.
5. prism diaphragm according to claim 2, it is characterized in that, the size towards the first base angle in each prism unit on the side of first direction of prism unit placed in the middle on prism diaphragm is equal with the ratio of the size at the second base angle, and/or the size towards the first base angle in each prism unit on the side of second direction of prism unit placed in the middle on prism diaphragm is equal with the ratio of the size at the second base angle.
6. the prism diaphragm according to any one of claim 1-5, is characterized in that, the first base angle of prism unit placed in the middle on prism diaphragm and the second base angle equal and opposite in direction.
7. the prism diaphragm according to any one of claim 1-5, is characterized in that, the size at the first base angle of described prism unit and the size at the second base angle are all in the scope of 10 degree to 80 degree.
8. the prism diaphragm according to any one of claim 1-5, is characterized in that, described substrate and prism unit are integrally formed or are independently formed.
9. a curved surface backlight, is characterized in that, described curved surface backlight comprises:
Prism diaphragm according to any one of claim 1-8.
10. curved surface backlight according to claim 9, is characterized in that, described curved surface backlight also comprises:
Curved surface light guide plate, described curved surface light guide plate has incidence surface and exiting surface, and described prism diaphragm is arranged on described exiting surface;
Light source, the light that described light source sends injects curved surface light guide plate from the incidence surface being positioned at light guide plate side, and each prism unit in described prism diaphragm injects the direction arrangement of curved surface light guide plate along described light,
Wherein, the size at the first base angle in each prism unit and the ratio of the size at the second base angle depend on the curvature of described curved surface light guide plate and determine.
11. curved surface backlights according to claim 9, is characterized in that, described curved surface backlight also comprises:
Curved surface diffuser plate, described curved surface diffuser plate has incidence surface and exiting surface, and described prism diaphragm is arranged on described exiting surface;
Light source, the light that described light source sends injects curved surface diffuser plate from the incidence surface being positioned at curved surface diffuser plate bottom surface, and each prism unit in described prism diaphragm is arranged along with the direction that described light injects the direction of curved surface diffuser plate vertical,
Wherein, the size at the first base angle in each prism unit and the ratio of the size at the second base angle depend on the curvature of described curved surface diffuser plate and determine.
12. 1 kinds of display device, is characterized in that, described display device comprises the prism diaphragm according to any one of claim 1-8 or the curved surface backlight according to any one of claim 9-11.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006534.5U CN204347285U (en) | 2015-01-05 | 2015-01-05 | Prism diaphragm, curved surface backlight and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006534.5U CN204347285U (en) | 2015-01-05 | 2015-01-05 | Prism diaphragm, curved surface backlight and display device |
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| CN204347285U true CN204347285U (en) | 2015-05-20 |
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| CN201520006534.5U Active CN204347285U (en) | 2015-01-05 | 2015-01-05 | Prism diaphragm, curved surface backlight and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503011A (en) * | 2015-01-05 | 2015-04-08 | 京东方科技集团股份有限公司 | Prism diaphragm, curved backlight source and display device |
| WO2018085497A1 (en) * | 2016-11-03 | 2018-05-11 | 3M Innovative Properties Company | Multiplexing backlight with asymmetric turning film |
-
2015
- 2015-01-05 CN CN201520006534.5U patent/CN204347285U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503011A (en) * | 2015-01-05 | 2015-04-08 | 京东方科技集团股份有限公司 | Prism diaphragm, curved backlight source and display device |
| CN104503011B (en) * | 2015-01-05 | 2017-08-11 | 京东方科技集团股份有限公司 | Prism diaphragm, curved surface backlight and display device |
| WO2018085497A1 (en) * | 2016-11-03 | 2018-05-11 | 3M Innovative Properties Company | Multiplexing backlight with asymmetric turning film |
| US10955592B2 (en) | 2016-11-03 | 2021-03-23 | 3M Innovative Properties Company | Multiplexing backlight with asymmetric turning film |
| US11585966B2 (en) | 2016-11-03 | 2023-02-21 | 3M Innovative Properties Company | Multiplexing backlight with asymmetric turning film |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171026 Address after: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Co-patentee after: Fuzhou BOE Photoelectric Technology Co., Ltd. Patentee after: BOE Technology Group Co., Ltd. Address before: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Co-patentee before: Beijing BOE Display Technology Co., Ltd. Patentee before: BOE Technology Group Co., Ltd. |
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| TR01 | Transfer of patent right |