CN211207019U - Double-sided backlight module and display screen - Google Patents
Double-sided backlight module and display screen Download PDFInfo
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- CN211207019U CN211207019U CN201922252581.9U CN201922252581U CN211207019U CN 211207019 U CN211207019 U CN 211207019U CN 201922252581 U CN201922252581 U CN 201922252581U CN 211207019 U CN211207019 U CN 211207019U
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- brightness enhancement
- light
- backlight module
- enhancement film
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Abstract
The utility model provides a two-sided backlight unit and display screen, wherein two-sided backlight unit includes the piece of adding lustre to, adds lustre to piece, diffusion piece, light guide plate, lamp strip and reflection bar down. The upper brightness enhancement sheet, the lower brightness enhancement sheet and the diffusion sheet are of a U-shaped structure, the light guide plate is sequentially wrapped by the diffusion sheet, the lower brightness enhancement sheet and the upper brightness enhancement sheet, the diffusion sheet is arranged in the same direction of the U-shaped structure opening of the lower brightness enhancement sheet and the upper brightness enhancement sheet, the light guide plate is connected with the diffusion sheet, the U-shaped opening end parts of the lower brightness enhancement sheet and the upper brightness enhancement sheet are connected, the light bar is connected to the light guide plate and is close to the U-shaped opening end, the reflecting strip is connected to one end, far away from the U-shaped opening end, a group of light bar and the light guide plate are omitted compared with the original double-sided backlight module, and meanwhile, the back plate does not need to be installed any more, so that the thickness of the double-sided backlight module is greatly reduced, the.
Description
Technical Field
The utility model relates to the field of photoelectric technology, especially, relate to a two-sided backlight unit and display screen.
Background
With the development of electronic product technology, the single-sided display technology has been far from meeting the requirements of people, and more electronic products are developing towards the direction of double-sided display. Backlight unit is as the key member in the display product, and traditional single face backlight unit design can't use to two-sided display technology, in order to adapt to the development trend of showing the trade, backlight unit also begins to develop towards two-sided backlight unit.
The common double-sided backlight module in the market at present mainly combines two single-sided backlight modules, namely, combines the two single-sided backlight modules back to back, so as to achieve the purpose of double-sided display. Therefore, the double-sided backlight module is realized, and the defects of thickness, high voltage and the like are brought.
SUMMERY OF THE UTILITY MODEL
Therefore, a double-sided backlight module is needed to be provided, and the problems that the backlight module needs two sets of light sources and two sets of diaphragms, the thickness is about twice of that of a single-sided backlight module, the thickness is large, the voltage is high and the like during double-sided display are solved.
In order to achieve the above object, the inventor provides a double-sided backlight module, which includes an upper brightness enhancement film, a lower brightness enhancement film, a diffusion film, a light guide plate, a light bar and a reflection strip;
the upper brightness enhancement film, the lower brightness enhancement film and the diffusion film are of U-shaped structures, the light guide plate is sequentially wrapped by the diffusion film, the lower brightness enhancement film and the upper brightness enhancement film, and openings of the U-shaped structures of the diffusion film, the lower brightness enhancement film and the upper brightness enhancement film are arranged in the same direction;
the light guide plate is connected with the diffusion sheet, the lower brightness enhancement sheet and the U-shaped opening end part of the upper brightness enhancement sheet;
the lamp strip is connected to the light guide plate and is close to the U-shaped opening end;
the reflecting strip is connected to one end, far away from the U-shaped opening, of the light guide plate.
Furthermore, the double-sided backlight module further comprises an upper frame and a lower frame, the upper frame is connected to the periphery of the upper portion of the upper brightness enhancement film, and the lower frame is connected to the periphery of the lower portion of the upper brightness enhancement film.
Furthermore, the double-sided backlight module further comprises an upper shading glue and a lower shading glue, the upper shading glue is adhered between the upper portion of the upper brightness enhancement sheet and the upper frame, and the lower shading glue is adhered between the lower portion of the upper brightness enhancement sheet and the lower frame.
Furthermore, the U-shaped structures of the upper brightness enhancement film, the lower brightness enhancement film and the diffusion film are symmetrical structures, namely the upper light-emitting area is equal to the lower light-emitting area.
Furthermore, the lower light-emitting area of the U-shaped structure of the upper light-adding sheet, the lower light-adding sheet and the diffusion sheet is half of the upper light-emitting area.
Furthermore, the lower light-emitting area of the U-shaped structure of the upper light-adding sheet, the lower light-adding sheet and the diffusion sheet is one fourth of the upper light-emitting area.
Further, the light bars are L ED light bars or CCF L light bars.
The inventor also provides a double-sided display screen, which comprises a shell, a driving board, a power board, a screen and a backlight module, wherein the backlight module is the double-sided backlight module in the scheme; the screen includes main screen and vice screen, and main screen connection is on two-sided backlight unit upper portion, and vice screen connection is in two-sided backlight unit lower part.
Different from the prior art, the double-sided backlight module comprises an upper brightness enhancement film, a lower brightness enhancement film, a diffusion film, a light guide plate, a light bar and a reflection strip. Go up the brightness enhancement piece, down brightness enhancement piece and diffusion piece be "U" type structure, adopt a diaphragm bending to become "U" type and replace two original diaphragms, reach the effect that two-sided all has the diaphragm, reduce two-sided backlight unit's thickness through a lamp strip of sharing and light guide plate, save a set of lamp strip and light guide plate simultaneously and greatly reduced power consumption, only need littleer supply voltage, it is more energy-concerving and environment-protective.
Drawings
FIG. 1 is an exploded view of a dual-sided backlight module according to an embodiment;
FIG. 2 is a cross-sectional view of a dual-sided backlight module according to an embodiment;
FIG. 3 is a schematic diagram illustrating a double-sided backlight module according to an embodiment with equal top and bottom light emitting areas;
FIG. 4 is a schematic diagram of a first dual-sided backlight module according to one embodiment having a bottom light-emitting area equal to half of a top light-emitting area;
FIG. 5 is a second dual-sided backlight module according to one embodiment having a bottom light-emitting area equal to half of a top light-emitting area;
FIG. 6 is a schematic diagram of a double-sided backlight module according to an embodiment in which the lower light-emitting area is equal to one fourth of the upper light-emitting area.
Description of reference numerals:
10. an upper brightness enhancement film; 11. the upper part of the upper brightness enhancement film; 12, the lower part of the brightness enhancement film;
20. a lower brightness enhancement film;
30. a diffusion sheet;
40. a light guide plate;
50. a light bar; 51. a diode; 52. a circuit board;
60. a reflective strip;
71. an upper frame;
72. a lower frame;
81. applying shading glue; 82. lower light shading glue;
90. black shading glue.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1-6, the present embodiment provides a double-sided backlight module, which includes an upper brightness enhancement film 10, a lower brightness enhancement film 20, a diffusion film 30, a light guide plate 40, a light bar 50, and a radiation bar 60.
The upper brightness enhancement film 10, the lower brightness enhancement film 20 and the diffusion film 30 are in a U-shaped structure, the light guide plate 40 is sequentially wrapped by the diffusion film 30, the lower brightness enhancement film 20 and the upper brightness enhancement film 10, openings of the U-shaped structures of the diffusion film 30, the lower brightness enhancement film 20 and the upper brightness enhancement film 10 are arranged in the same direction, and the light guide plate 40 is connected with the diffusion film 30, the ends of the U-shaped openings of the lower brightness enhancement film 20 and the upper brightness enhancement film 10. The light bar 50 is connected to the light guide plate 40 near the open end of the "U" shape. The radiation strip 60 is attached to the end of the light guide plate 40 remote from the "U" shaped opening.
The light bar 50 can be L ED light bar 50 or CCF L light bar 50, L ED light bar 50 is composed of a group of light emitting diodes 51 sequentially connected to a strip circuit board 52. in operation, the light bar 50 emits light, the light enters the light guide plate 40, the light guide plate 40 diffusely reflects a point light source of the side L ED light bar 50 into a surface light source, the surface light source simultaneously radiates light to the upper and lower surfaces, and the light enters the upper and lower parts of the U-shaped diffusion sheet 30, the lower brightness enhancement sheet 20 and the upper brightness enhancement sheet 10 to generate double-sided backlight.
When the light guide plate 40 is bonded with the diffusion sheet 30, the lower brightness enhancement sheet 20 and the upper brightness enhancement sheet 10, only the U-shaped opening ends of the diffusion sheet 30, the lower brightness enhancement sheet 20 and the upper brightness enhancement sheet 10 are bonded with one end of the light guide plate 40, and the end far away from the U-shaped opening does not need to be bonded, so that the connection mode can avoid bonding of two ends like the original backlight assembly, and the effective use area of the backlight module can be increased.
Go up the brightness enhancement piece 10, down brightness enhancement piece 20 and diffusion piece 30 "U" type structure, adopt a diaphragm bending to "U" type to replace two original diaphragms, can reduce the process of tailorring, can reach the effect that two-sided all had the diaphragm again, lamp strip 50 and light guide plate 40 are used in two-sided sharing, compare in original two-sided backlight unit and saved a set of lamp strip 50 and light guide plate 40, also no longer need install the backplate simultaneously, consequently greatly reduced two-sided backlight unit's thickness, the weight of having alleviateed two-sided backlight unit, the power consumption has been reduced simultaneously, only need littleer supply voltage, energy-concerving and environment-protective more.
In other real-time examples, the double-sided backlight module further includes an upper frame 71 and a lower frame 72, the upper frame 71 is connected around the upper portion 11 of the upper brightness enhancement film, and the lower frame 72 is connected around the lower portion 12 of the upper brightness enhancement film. The upper frame 71 and the lower frame 72 are mutually bonded, and the upper frame 71 and the lower frame 72 are made of thermoplastic engineering material PC with excellent comprehensive performance and are used for supporting and fixing other components in the double-sided backlight module and protecting other components. On the basis of the lower frame 72 and the upper frame 71, an upper light-shading glue 81, a lower light-shading glue 82 and an upper light-shading glue 81 can be additionally arranged and are adhered between the upper portion 11 of the upper brightness enhancement film and the upper frame 71, and a lower light-shading glue 82 is adhered between the lower portion 12 of the upper brightness enhancement film and the lower frame 72, so that light is prevented from leaking from a gap between the upper brightness enhancement film 10 and the lower frame 72 to influence display.
Meanwhile, in order to avoid light leakage at the position of the 50 light sources of the light bar due to overlarge brightness of the light emitted by the 50 light sources of the light bar, the double-sided backlight module is further provided with black shading glue 90, and the black shading glue 90 is arranged at the lower part of the 50 light bar and used for absorbing strong light at the position of the light source and ensuring that the position of the 50 light source of the light bar is light-tight.
In other embodiments, the U-shaped structures of the upper brightness enhancement film 10, the lower brightness enhancement film 20 and the diffusion film 30 may be symmetrical structures, i.e. the upper light-emitting area is equal to the lower light-emitting area, as shown in fig. 3, the light-emitting areas on both sides of the double-sided backlight module are equal, and backlight can be provided for two screens with the same size. When the areas of the screens on the two sides are different and the required backlight areas are different, the corresponding light-emitting areas can be set by changing the lengths of one side of the U-shaped structures of the upper light-adding sheet 10, the lower light-adding sheet 20 and the diffusion sheet 30 so as to adapt to the screens with different sizes. For example, in both arrangements shown in fig. 4 and 5, the lower light-emitting areas of the U-shaped structures of the upper light-increasing sheet 10, the lower light-increasing sheet 20 and the diffusion sheet 30 are half of the upper light-emitting area, or the lower light-emitting areas of the U-shaped structures of the upper light-increasing sheet 10, the lower light-increasing sheet 20 and the diffusion sheet 30 are quarter of the upper light-emitting area as shown in fig. 6. The proportion of the upper luminous area of the U-shaped structure to the lower luminous area can be adjusted according to the screen display requirements, the method is simple, and the applicability is good.
In some other embodiments, a dual-sided display screen is provided, which includes a housing, a driving board, a power board, a screen, and a backlight module, wherein the backlight module is the dual-sided backlight module; the screen includes main screen and vice screen, and main screen connection is on two-sided backlight unit upper portion, and vice screen connection is in two-sided backlight unit lower part. The main screen and the auxiliary screen adopt the same backlight module, so that the thickness and the weight of the double-sided display screen are greatly reduced, and the double-sided display screen is more convenient to carry and store.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the protection scope of the present invention.
Claims (9)
1. A double-sided backlight module is characterized by comprising an upper brightness enhancement film, a lower brightness enhancement film, a diffusion film, a light guide plate, a light bar and a reflection bar;
the upper brightness enhancement film, the lower brightness enhancement film and the diffusion film are of U-shaped structures, the light guide plate is sequentially wrapped by the diffusion film, the lower brightness enhancement film and the upper brightness enhancement film, and openings of the U-shaped structures of the diffusion film, the lower brightness enhancement film and the upper brightness enhancement film are arranged in the same direction;
the light guide plate is connected with the diffusion sheet, the lower brightness enhancement sheet and the U-shaped opening end part of the upper brightness enhancement sheet;
the lamp strip is connected to the light guide plate and is close to the U-shaped opening end;
the reflecting strip is connected to one end, far away from the U-shaped opening, of the light guide plate.
2. The double-sided backlight module of claim 1, further comprising an upper frame and a lower frame, wherein the upper frame is connected around the upper portion of the upper brightness enhancement film, and the lower frame is connected around the lower portion of the upper brightness enhancement film.
3. The double-sided backlight module of claim 2, further comprising an upper light-shielding adhesive and a lower light-shielding adhesive, wherein the upper light-shielding adhesive is bonded between the upper portion of the upper brightness enhancement film and the upper frame, and the lower light-shielding adhesive is bonded between the lower portion of the upper brightness enhancement film and the lower frame.
4. The double-sided backlight module of claim 1, further comprising black light-shielding glue disposed on a lower portion of the light bar.
5. The dual-sided backlight module as claimed in claim 1, wherein the U-shaped structures of the upper brightness enhancement film, the lower brightness enhancement film and the diffusion film are symmetrical, i.e. the upper light-emitting area is equal to the lower light-emitting area.
6. The dual-sided backlight module as claimed in claim 1, wherein the upper, lower and diffusion sheet "U" shaped structures have a lower light-emitting area half of an upper light-emitting area.
7. The dual-sided backlight module as claimed in claim 1, wherein the upper, lower and diffusion sheet "U" shaped structures have a lower light emitting area that is one quarter of an upper light emitting area.
8. The double-sided backlight module of claim 1, wherein the light bar is an L ED light bar or a CCF L light bar.
9. A double-sided display screen, comprising a housing, a driving board, a power board, a main screen, a sub-screen and a backlight module, wherein the backlight module is a double-sided backlight module as claimed in any one of claims 1 to 8; the screen includes main screen and vice screen, and main screen connection is on two-sided backlight unit upper portion, and vice screen connection is in two-sided backlight unit lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922252581.9U CN211207019U (en) | 2019-12-16 | 2019-12-16 | Double-sided backlight module and display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922252581.9U CN211207019U (en) | 2019-12-16 | 2019-12-16 | Double-sided backlight module and display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211207019U true CN211207019U (en) | 2020-08-07 |
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ID=71886109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922252581.9U Active CN211207019U (en) | 2019-12-16 | 2019-12-16 | Double-sided backlight module and display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211207019U (en) |
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2019
- 2019-12-16 CN CN201922252581.9U patent/CN211207019U/en active Active
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