CN216013890U - Reflector plate, backlight module and display device - Google Patents
Reflector plate, backlight module and display device Download PDFInfo
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- CN216013890U CN216013890U CN202122260043.1U CN202122260043U CN216013890U CN 216013890 U CN216013890 U CN 216013890U CN 202122260043 U CN202122260043 U CN 202122260043U CN 216013890 U CN216013890 U CN 216013890U
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Abstract
The utility model relates to a reflector plate, backlight unit and display device. The emitting sheet is provided with a plurality of through holes for a plurality of light emitting pieces to extend in, the reflecting sheet is further provided with a center point, at least one first dimming area and at least one second dimming area, the distance between the at least one first dimming area and the center point is smaller than the distance between the at least one second dimming area and the center point, the plurality of light emitting pieces are distributed in the at least one first dimming area and the at least one second dimming area, the at least one first dimming area is provided with a first dimming means, the at least one second dimming area is provided with a second dimming means, and the size of the first dimming means is different from that of the second dimming means. Through the structural design of the reflector plate, the luminance difference between the first dimming area and the second dimming area can be reduced, and the uniformity of the brightness light emission of the whole area is improved.
Description
Technical Field
The utility model relates to an optical device, in particular to reflector plate, backlight unit and display device.
Background
The backlight module of the conventional lcd is disposed on the back of the lcd panel to provide the display light source required by the lcd panel. The backlight module can be classified into a "side-in" design and a "direct-out" design according to the position of the light source, wherein the backlight module of the "direct-out" design usually uses a plurality of light emitting diodes as the light source. When a plurality of leds are used as light sources, a diffusion plate or a light guide plate is usually assembled after a certain spreading distance is reserved above the leds, and then the light guide plate is disposed below the lcd panel to provide a uniform light source for the lcd panel.
However, in practice, the intensity of the light of the led is strongest in the front viewing angle direction (i.e. the normal direction of the light emitting surface of the led), so a bright spot is still formed in the front projection area of the led corresponding to the light guide plate, which causes the surface brightness of the surface light source to be uneven. Especially, the brightness of the central area of the backlight module is contributed by more leds, and the brightness of the peripheral area of the backlight module is contributed by less leds because of the proximity to the side wall, which causes the brightness of the central area of the backlight module to be higher than that of the peripheral area of the backlight module, and also causes the surface brightness of the surface light source to be uneven, and the light-emitting uniformity of the brightness of the whole area is poor.
SUMMERY OF THE UTILITY MODEL
Therefore, an object of the present invention is to provide a reflector plate capable of improving light-emitting uniformity of total Area brightness (Area Scan).
The reflector plate is provided with a plurality of through holes for a plurality of light emitting pieces to extend in, and the reflector plate is further provided with a center line passing through a center point, at least one first dimming area and at least one second dimming area, wherein the distance between the center line and the at least one first dimming area is smaller than the distance between the center line and the at least one second dimming area, the plurality of light emitting pieces are distributed in the at least one first dimming area and the at least one second dimming area, the at least one first dimming area is provided with a first dimming means, the at least one second dimming area is provided with a second dimming means, and the size of the first dimming means is different from the size of the second dimming means.
The utility model discloses a further technical means, lie in that every this first dimming area all has the diapire and connects in the wall that surrounds of this diapire with every this second dimming area, should surround the end of wall and go out the opening, this a plurality of perforation is formed on every this first dimming area and every this second dimming area's this diapire respectively, every this first dimming area is located the coplanar with every this second dimming area's opening, form vertical distance between this diapire to this opening, the size of this first dimming means is the vertical distance of this first dimming area, the size of this second dimming means is the vertical distance of this second dimming area, the size of this first dimming means is less than the size of this second dimming means.
The utility model discloses a further technical means, lie in that every this first dimming area all has the diapire and connects in the wall around of this diapire with every this second dimming area, this a plurality of perforation are formed on every this first dimming area and every this second dimming area's this diapire respectively, the size of this first dimming means is the fenestrate aperture in this first dimming area, the size of this second dimming means is the fenestrate aperture in this second dimming area, the size of this first dimming means is greater than the size of this second dimming means.
The utility model discloses a another technical means lies in that this a plurality of perforation are formed respectively in every this first region of adjusting luminance and every this second region of adjusting luminance, and the size of this first means of adjusting luminance is the fenestrate aperture in this first region of adjusting luminance, and the size of this second means of adjusting luminance is the fenestrate aperture in this second region of adjusting luminance, and the size of this first means of adjusting luminance is greater than the size of this second means of adjusting luminance.
Another object of the present invention is to provide a backlight module.
The backlight module comprises a light-emitting unit, a fixing piece and the reflecting sheet. The light-emitting unit comprises a circuit board and a plurality of light-emitting pieces arranged on the circuit board at intervals. The fixing piece is arranged on the circuit board and is provided with a plurality of broken holes for the plurality of luminous pieces to respectively penetrate through.
Another technical means of the present invention is characterized in that the fixing member has at least one first supporting portion corresponding to the at least one first dimming region and at least one second supporting portion corresponding to the at least one second dimming region, and the thickness of the first supporting portion is greater than that of the second supporting portion, so that the sum of the vertical distance of the first dimming region and the thickness of the first supporting portion is equal to the sum of the vertical distance of the second dimming region and the thickness of the second supporting portion.
Another technical means of the present invention is to provide the fixing member with a reflectivity smaller than a reflectivity of the reflective sheet.
Another technical means of the present invention is to provide the reflector plate with a hole diameter larger than the hole diameter of the fixing member.
Another object of the present invention is to provide a display device, which includes the backlight module and the display panel disposed on the backlight module.
The utility model discloses an efficiency lies in, through the structural design of this reflector plate, can reduce the first luminance difference of adjusting luminance between the region and the second region of adjusting luminance, promotes the homogeneity of total district luminance light-emitting.
Drawings
In order to make the above and other objects, features, advantages and embodiments of the present invention more comprehensible, the following description is made with reference to the accompanying drawings:
FIG. 1 is a side sectional view of a preferred embodiment of a display device of the present invention, wherein the reflective sheet has dimming regions with different depths;
FIG. 2 is a cross-sectional side view of another aspect of the preferred embodiment, wherein the reflective sheet has a light-adjusting region with different hole sizes;
FIG. 3 is a cross-sectional side view of another aspect of the preferred embodiment, wherein the reflector plate is planar and has light-adjusting regions with different hole sizes; and
FIG. 4 is a cross-sectional side view of another aspect of the preferred embodiment, wherein the perforations of the reflector plate are larger than the corresponding perforations in the fixture.
Detailed Description
The features and technical content of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings. Before proceeding with the detailed description, it should be noted that similar elements are denoted by the same reference numerals.
Referring to fig. 1, a preferred embodiment of the display device of the present invention includes a light emitting unit 2, a fixing member 3 disposed on the light emitting unit 2, a reflective sheet 4 disposed on the fixing member 3, and a display panel 5 disposed on a light emitting side of the reflective sheet 4. The light emitting unit 2 includes a circuit board 21 and a plurality of light emitting elements 22 spaced apart from the circuit board 21. The fixing member 3 is disposed on the circuit board 21 and has a plurality of holes 31 for the light emitting elements 22 to pass through. In the embodiment, the fixing member 3 is an adhesive tape for fixing the reflection sheet 4 on the circuit board 21, so as to prevent the reflection sheet 4 from shifting or deforming to cause the quality variation of the optical appearance caused by the collision or the reliability test (RA test) of the display device. However, the fixing member 3 is not limited to an adhesive tape, and an optical adhesive or the like may be used to achieve the fixing effect.
The reflection sheet 4 has a plurality of through holes 40 for the plurality of light emitting elements 22 to extend therein, and the reflection sheet 4 further has a center line L passing through a center point thereof, a plurality of first dimming regions 41a and a plurality of second dimming regions 41 b. It should be noted that the distance between the first dimming region 41a and the center line L is smaller than the distance between the second dimming region 41b and the center line L, that is, the first dimming region 41a is located at a relatively central position of the reflection sheet 4, and the second dimming region 41b is located at a relatively outer side of the first dimming region 41 a. Each of the first dimming regions 41a and each of the second dimming regions 41b has a bottom wall 411 and a surrounding wall 412 connected to the bottom wall 411, thereby forming a cup-shaped structure. The reflective sheet 4 is mainly used to make the light emitted upward by the light emitting element 22 be reflected by the surrounding wall 412 of the reflective sheet 4, so as to improve the contrast of the image. The surrounding wall 412 surrounds the opening 413, and the through holes 40 are respectively formed on the bottom wall 411 of each first dimming region 41a and each second dimming region 41 b. The openings 413 of each first dimming area 41a and each second dimming area 41b are located on the same plane, and a vertical distance is formed between the bottom wall 411 and the openings 413.
The plurality of light emitting elements 22 are distributed in the first dimming regions 41a and the second dimming regions 41b, each of the first dimming regions 41a has a first dimming means, each of the second dimming regions 41b has a second dimming means, and the size of the first dimming means is different from the size of the second dimming means. In the present embodiment, the first dimming means has a size of the vertical distance D1 of the first dimming region 41a, the second dimming means has a size of the vertical distance D2 of the second dimming region 41b, and the first dimming means has a size smaller than the second dimming means.
Since the openings 413 of the first and second dimming regions 41a and 41b are located on the same plane, the vertical distance of the first dimming region 41a is short, that is, the first dimming region 41a has a shallow concave cup shape, and the second dimming region 41b has a deep concave cup shape. In addition, the holder 3 has a plurality of first support parts 32a corresponding to the plurality of first dimming regions 41a, and a plurality of second support parts 32b corresponding to the plurality of second dimming regions 41b, respectively, and the thickness of the first support part 32a is greater than that of the second support part 32b, so that the sum of the vertical distance D1 of the first dimming region 41a and the thickness of the first support part 32a is equal to the sum of the vertical distance D2 of the second dimming region 41b and the thickness of the second support part 32 b. The fixing member 3 can provide a complete supporting function for the reflection sheet 4 by the mutual cooperation of the structures of the reflection sheet 4 and the fixing member 3, and simultaneously, the reflection sheet 4 is not deflected relative to the display panel 5.
Moreover, no matter the light emitting element 22 located in the first dimming region 41a or the light emitting element 22 located in the second dimming region 41b, the lower half portion thereof is located outside the reflective sheet 4, so that a part of light can be emitted between the reflective sheet 4 and the circuit board 21 and absorbed by the fixing member 3 (for example, the adhesive tape material is easy to absorb light), and thus the amount of light reflected by the reflective sheet 4 can be reduced, thereby reducing the reflection effect.
In the present embodiment, in combination with the design that the vertical distance D1 of the first dimming area 41a is shorter, the ratio of the light emitting element 22 located in the first dimming area 41a to the lower portion outside the reflective sheet 4 is higher, and the ratio of the light emitting element 22 located in the second dimming area 41b to the lower portion outside the reflective sheet 4 is lower, so that the reflection reducing effect of the first dimming area 41a is greater than that of the second dimming area 41 b. In the conventional direct-type light source, the central area is likely to generate a bright area due to the front viewing angle position of each light source and the intersection of the light rays, and the peripheral area is likely to generate a dark area due to insufficient brightness, thereby resulting in non-uniform overall brightness. The utility model discloses an above-mentioned design, can reduce the luminance of first regional 41a of adjusting luminance, and then reduce the luminance difference between first regional 41a of adjusting luminance and the second regional 41b of adjusting luminance, promote the homogeneity of whole district luminance (Area Scan) light-emitting.
It should be noted that the present invention also provides other means for making the size of the first dimming means different from the size of the second dimming means.
Referring to fig. 2, in some embodiments, the first dimming means has a size of an aperture of the perforation 40a of the first dimming area 41a, the second dimming means has a size of an aperture of the perforation 40b of the second dimming area 41b, and the first dimming means has a size greater than the second dimming means. That is, in fig. 2, the first dimming region 41a and the second dimming region 41b are both in a concave cup shape, and have the same depth, except for the aperture size of the through hole 40. The aperture of the through hole 40a of the first dimming region 41a is larger, so that after the light is emitted from the light emitting element 22 located in the first dimming region 41a, a part of the light is projected onto the fixing element 3, and thus the light projected onto the fixing element 3 in the first dimming region 41a is absorbed by the fixing element 3, and the proportion of reflection by the reflection sheet 4 is reduced, thereby improving the light absorption effect and reducing the reflection effect. Through the above manner, the aperture of the perforation 40a of the first dimming area 41a is larger, the aperture of the perforation 40b of the second dimming area 41b is smaller, and the reduction range of the amount of light reflected in the first dimming area 41a is larger than the reduction range of the amount of light reflected in the second dimming area 41b, so that the luminance of the first dimming area 41a can be reduced, the luminance difference between the first dimming area 41a and the second dimming area 41b can be reduced, and the uniformity of the whole-area luminance light emission can be improved. That is, in the embodiment disclosed in fig. 2, the reflection effect of the first dimming region 41a and the second dimming region 41b is not adjusted by the depth of the concave cup-shaped structure as in fig. 1, but the absorption effect of the first dimming region 41a and the second dimming region 41b is adjusted by the aperture size of the through hole 40. If there is a design limit to the aperture size of the through hole 40, the light absorption effect can be further improved by using a design in which the reflectance of the fixing member 3 is smaller than that of the reflective sheet 4, i.e., by selecting a fixing member 3 having a lower reflectance.
It should be particularly noted that, as shown in fig. 3, the above design with different aperture sizes of the perforation 40 can also be applied to the planar reflective sheet 4, that is, in the planar reflective sheet 4, the aperture of the perforation 40a of the first dimming region 41a is larger, the aperture of the perforation 40b of the second dimming region 41b is smaller, and the reduction of the amount of light reflected in the first dimming region 41a is also larger than the reduction of the amount of light reflected in the second dimming region 41b, so as to reduce the luminance of the first dimming region 41a, thereby reducing the luminance difference between the first dimming region 41a and the second dimming region 41b, and improving the uniformity of the luminance light output in the whole area. In addition, the planar reflective sheet 4 is simpler to manufacture than the three-dimensional reflective sheet shown in fig. 1 and 2, and the manufacturing cost is further reduced.
It should be noted that, in fig. 2, the hole diameter of the broken hole 31 of the fixing member 3 is matched with the through holes 40a and 40b to have the same size, but in some embodiments, as shown in fig. 4, the hole diameter of the through hole 40 of the reflection sheet 4 is larger than the hole diameter of the broken hole 31 of the fixing member 3. That is, the aperture size is designed such that the reflection surface of the reflection sheet 4 is relatively small for the light emitted from the light emitting element 22 in the first dimming region 41a, and the light absorption surface of the fixing element 3 is relatively large to improve the light absorption effect, so that in the embodiment shown in fig. 4, the reduction range of the amount of the light reflected in the first dimming region 41a is larger than the reduction range of the amount of the light reflected in the first dimming region 41a in the embodiment shown in fig. 3, and therefore, the effect of reducing the luminance of the first dimming region 41a is more obvious.
In addition to the embodiments of the display device disclosed in the present invention, the reflective sheet 4 or the backlight module including the reflective sheet 4, the light emitting unit 2 and the fixing member 3 can be manufactured according to the requirements of the customers or the actual requirements. Since the structure can refer to the embodiments disclosed in fig. 1 to 4, the description thereof is omitted here.
To sum up, the utility model discloses the size that utilizes the first means of adjusting luminance of reflector plate 4 is different from the size of the second means of adjusting luminance, reduces the luminance of the first regional 41a of adjusting luminance, and then reduces the luminance difference between the first regional 41a of adjusting luminance and the second regional 41b of adjusting luminance, promotes the homogeneity of the luminance light-emitting of whole district, so can reach the purpose of the utility model with low costs really.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the scope of the claims and the content of the specification of the present invention are still included in the scope of the patent coverage of the present invention.
[ List of reference numerals ]
2 light emitting unit
21 circuit board
22 luminous element
3 fixing part
31 hole breaking
32a first support part
32b second support part
4 reflective sheet
40 perforation
40a perforation
40b perforation
41a first dimming region
41b second dimming region
411 bottom wall
412 surrounding the wall
413 opening
5 display panel
L center line
D1 vertical distance
D2 vertical distance.
Claims (9)
1. A reflector plate is characterized in that the reflector plate is provided with a plurality of through holes for a plurality of light emitting elements to extend in, the reflector plate is further provided with a center line passing through the center point of the reflector plate, at least one first dimming area and at least one second dimming area, the distance between the at least one first dimming area and the center line is smaller than the distance between the at least one second dimming area and the center line, the plurality of light emitting elements are distributed in the at least one first dimming area and the at least one second dimming area, the at least one first dimming area is provided with a first dimming means, the at least one second dimming area is provided with a second dimming means, and the size of the first dimming means is different from that of the second dimming means.
2. The reflector plate as claimed in claim 1, wherein each of the first and second dimming regions has a bottom wall and a surrounding wall connected to the bottom wall, the surrounding wall surrounds an opening at an end thereof, the plurality of through holes are respectively formed on the bottom walls of the first and second dimming regions, the openings of the first and second dimming regions are located on a same plane, a vertical distance is formed between the bottom wall and the opening, the first dimming means has a size equal to the vertical distance of the first dimming region, the second dimming means has a size equal to the vertical distance of the second dimming region, and the first dimming means has a size smaller than the second dimming means.
3. The reflector plate as claimed in claim 1, wherein each of the first light modulation regions and the second light modulation regions has a bottom wall and a surrounding wall connected to the bottom wall, the plurality of through holes are formed on the bottom wall of each of the first light modulation regions and the second light modulation regions, the first light modulation means has a size of an aperture of the through hole in the first light modulation region, the second light modulation means has a size of an aperture of the through hole in the second light modulation region, and the first light modulation means has a size larger than the second light modulation means.
4. The reflector plate as claimed in claim 1, wherein the plurality of perforations are formed in each of the first dimming regions and the second dimming regions, respectively, the first dimming means having a size of an aperture of the perforation in the first dimming region, the second dimming means having a size of an aperture of the perforation in the second dimming region, and the first dimming means having a size larger than that of the second dimming means.
5. A backlight module, comprising:
the light-emitting unit comprises a circuit board and a plurality of light-emitting pieces arranged on the circuit board at intervals;
the fixing piece is arranged on the circuit board and is provided with a plurality of broken holes for the plurality of luminous pieces to respectively penetrate through; and
the reflection sheet according to any one of claims 1 to 4, which is provided on the fixing member.
6. A backlight module, comprising:
the light-emitting unit comprises a circuit board and a plurality of light-emitting pieces arranged on the circuit board at intervals;
the fixing piece is arranged on the circuit board and is provided with a plurality of broken holes for the plurality of luminous pieces to respectively penetrate through; and
the reflective sheet according to claim 2, which is disposed on the fixing member;
the fixing member has at least one first supporting portion corresponding to the at least one first dimming region and at least one second supporting portion corresponding to the at least one second dimming region, and the thickness of the first supporting portion is greater than that of the second supporting portion, so that the sum of the vertical distance of the first dimming region and the thickness of the first supporting portion is equal to the sum of the vertical distance of the second dimming region and the thickness of the second supporting portion.
7. The backlight module as claimed in claim 5 or 6, wherein the fixed member has a reflectivity less than that of the reflective sheet.
8. The backlight module as claimed in claim 5 or 6, wherein the perforations of the reflector are larger than the holes of the fixing member.
9. A display device, comprising:
a backlight module according to any one of claims 5 to 8, and
and the display panel is arranged on the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122260043.1U CN216013890U (en) | 2021-09-17 | 2021-09-17 | Reflector plate, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122260043.1U CN216013890U (en) | 2021-09-17 | 2021-09-17 | Reflector plate, backlight module and display device |
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| Publication Number | Publication Date |
|---|---|
| CN216013890U true CN216013890U (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122260043.1U Active CN216013890U (en) | 2021-09-17 | 2021-09-17 | Reflector plate, backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023039855A1 (en) * | 2021-09-17 | 2023-03-23 | 瑞仪(广州)光电子器件有限公司 | Reflector sheet, backlight module and display apparatus |
-
2021
- 2021-09-17 CN CN202122260043.1U patent/CN216013890U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023039855A1 (en) * | 2021-09-17 | 2023-03-23 | 瑞仪(广州)光电子器件有限公司 | Reflector sheet, backlight module and display apparatus |
| CN116137886A (en) * | 2021-09-17 | 2023-05-19 | 瑞仪(广州)光电子器件有限公司 | Reflection sheet, backlight module and display device |
| US11835819B2 (en) | 2021-09-17 | 2023-12-05 | Radiat Opto-Electronics Corporation | Reflective sheet, backlight module, and display device |
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