CN218413146U - Backlight module and display screen - Google Patents
Backlight module and display screen Download PDFInfo
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- CN218413146U CN218413146U CN202222144723.1U CN202222144723U CN218413146U CN 218413146 U CN218413146 U CN 218413146U CN 202222144723 U CN202222144723 U CN 202222144723U CN 218413146 U CN218413146 U CN 218413146U
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Abstract
The utility model relates to a backlight module and display screen, backlight unit includes: the frame body comprises a bottom wall and a side wall, the bottom wall and the side wall are enclosed to form an accommodating cavity, a back plate and an optical film set are accommodated in the accommodating cavity, and the optical film set comprises a blue film and a quantum dot film; the backboard is positioned on the bottom wall, a plurality of light-emitting chips are arranged on the backboard, and the blue film and the quantum dot film are sequentially stacked along the light-emitting direction of the backlight module; the quantum dot film comprises a main body part and an outer edge part arranged around the periphery of the main body part, the main body part correspondingly covers the blue film, the outer edge part correspondingly covers a gap between the blue film and the side wall, and a fluorescent glue film is arranged on the outer edge part. The quantum dot membrane corresponds with the clearance between fluorescence glued membrane and the lateral wall, consequently can be absorbed and the conversion by outer edge portion and fluorescence glued membrane through the light that this clearance jetted out, has prevented revealing of light, has improved the conversion rate of light to and the homogeneity of light-emitting, the purity of light source is also more done, backlight unit's display effect is better.
Description
Technical Field
The utility model relates to an optical display field especially relates to a backlight unit and display screen.
Background
The liquid crystal display screen is the most widely and mature display screen in the world at present, the backlight module is an important part of the liquid crystal industry chain, and accounts for more than 20% of the cost of the liquid crystal display screen, and the backlight module mainly comprises a backlight source, an optical film group, a glue frame and the like.
In the backlight module, the backlight source is generally disposed at the bottom of the plastic frame, and then the optical film sets are sequentially stacked on the backlight source to obtain the backlight module. Since it is necessary to ensure that each optical film unit can be smoothly stacked in the frame, a certain gap is left between the optical film unit and the frame. However, in the actual use process, because there is a gap between the optical film group and the frame body, a part of light emitted by the backlight source under the optical film group is directly emitted from the gap, the light conversion rate is reduced, the light display is not uniform, and the display effect of the backlight module is affected.
Disclosure of Invention
In view of the above deficiencies of the related art, an object of the present application is to provide a backlight module and a display screen, which are used to solve the problems of low light conversion rate and non-uniform display in the conventional backlight module.
In order to solve the above technical problem, the present application provides a backlight module, including:
the frame body comprises a bottom wall and a side wall, the bottom wall and the side wall are enclosed to form an accommodating cavity, a back plate and an optical film set are accommodated in the accommodating cavity, and the optical film set comprises a blue film and a quantum dot film;
the back plate is positioned on the bottom wall, a plurality of light-emitting chips are arranged on the back plate, and the blue film and the quantum dot film are sequentially stacked along the light-emitting direction of the backlight module; the quantum dot film comprises a main body part and an outer edge part arranged around the periphery of the main body part, the main body part correspondingly covers the blue film, the outer edge part correspondingly covers a gap between the blue film and the side wall, and a fluorescent glue film is arranged on the outer edge part.
Optionally, a width of a vertical projection of the fluorescent glue film on the quantum dot film is less than or equal to a width of the outer edge portion.
Optionally, the fluorescent glue film is located on one surface of the quantum dot film, which is far away from the light emitting chip.
Optionally, the optical film set includes a blue film, a quantum dot film, and a light enhancement film stacked in sequence along a light exit direction of the backlight module, and one surface of the fluorescent film, which is far away from the quantum dot film, is lower than one surface of the light enhancement film, which is far away from the quantum dot film, or is flush with one surface of the light enhancement film, which is far away from the quantum dot film.
Optionally, the fluorescent glue film is located on one surface of the quantum dot film close to the light emitting chip.
Optionally, the fluorescent glue film comprises a first fluorescent glue film located on one surface, far away from the light-emitting chip, of the quantum dot film and a second fluorescent glue film located on one surface, near to the light-emitting chip, of the quantum dot film, and the first fluorescent glue film and the second fluorescent glue film are of an integrated structure.
Optionally, the fluorescent glue film is an integral rectangular ring shape corresponding to the shape of the outer edge part,
or the fluorescent glue film comprises a plurality of fluorescent glue bodies, and each fluorescent glue body is enclosed to form a rectangular ring shape corresponding to the shape of the outer edge part.
Optionally, a step is arranged at one end, close to the bottom wall, of the inner side of the side wall, and the outer edge portion faces towards one face of the back plate and is arranged on the table top of the step in an attaching mode.
Optionally, the optical film group comprises a diffusion film, a blue film, the quantum dot film, a first brightness enhancement film and a second brightness enhancement film, and the diffusion film, the blue film, the quantum dot film, the first brightness enhancement film and the second brightness enhancement film are sequentially stacked along the light emitting direction of the backlight module.
In order to solve the technical problem, the present application further provides a display screen, which includes a liquid crystal panel and the backlight module as described above, wherein the liquid crystal panel covers the light emitting direction of the backlight module.
Advantageous effects
In the backlight module that this application provided, the quantum dot membrane includes the main part, surrounds the outer edge portion of main part week setting. The main body part correspondingly covers the blue film to absorb and convert light emitted after passing through the blue film, and the outer edge part correspondingly covers the gap between the blue film and the side wall, so that the light emitted through the gap can be absorbed and converted by the outer edge part of the quantum dot film, light leakage is prevented, the light conversion rate and the light emitting uniformity are improved, and the display effect of the backlight module is better. In addition, still be equipped with the fluorescence glued membrane on the outer edge portion of quantum dot membrane, also can further carry out absorption conversion to the light that jets out in the clearance promptly by the fluorescence glued membrane, optimized backlight unit edge area's demonstration, improved backlight unit's display effect.
Drawings
Fig. 1 is a schematic structural view of a backlight module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a quantum dot film provided in an embodiment of the present invention;
fig. 3 is another schematic structural diagram of a backlight module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;
fig. 6 is a schematic view of an integrated structure of a first fluorescent glue film and a second fluorescent glue film provided in an embodiment of the present invention;
fig. 7 is a schematic view of a fluorescent glue film disposed on a quantum dot film according to an embodiment of the present invention;
fig. 8 is another schematic view of a fluorescent glue film disposed on a quantum dot film according to an embodiment of the present invention;
description of the reference numerals:
the LED display screen comprises a frame body 1, a side wall 101, a bottom wall 102, a back panel 2, a light emitting chip 3, a diffusion film 4, a blue film 5, a quantum dot film 6, a main body 601, an outer edge 602, a fluorescent glue film 7, a first fluorescent glue film 701, a second fluorescent glue film 702, a first brightness enhancement film 8 and a second brightness enhancement film 9.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The embodiment provides a backlight module, which solves the technical problem that the display effect of the backlight module is poor because a gap exists between an optical film group and a frame body 1, and a part of light emitted by a backlight source below the optical film group is directly emitted from the gap, so that the light conversion rate is reduced, the light is displayed unevenly, and the edge of the light can be blue light.
For the convenience of understanding, the structure of the backlight module is illustrated in the following.
As shown in fig. 1-8, the backlight module provided in this embodiment includes, but is not limited to:
The back plate 2 is located on the bottom wall 102, and a plurality of light emitting chips 3 are arranged on the back plate 2. In this embodiment, the back plate 2 may fix the light emitting chip 3 by bonding the bonding pad and the electrode of the light emitting chip 3. The back plate 2 and the light emitting chips 3 form a backlight source of the backlight module, and the backlight source can be fixed on the frame body 1 and is fixedly connected with the bottom wall 102 of the frame body 1 through clamping or screws. In some applications, the back plate 2 may also be positioned through the bottom wall 102 of the frame 1 and fixed on the back shell of the backlight module, which is not limited in this embodiment. The Light Emitting chip 3 is a blue Light Emitting chip 3, which can be but not limited to an LED Light Emitting chip, and the LED Light Emitting chip can include but not limited to a general-sized LED, and can also include a Micro LED chip, for example, but not limited to a Mini LED (sub millimeter Light Emitting Diode), a Micro LED (Micro Light Emitting Diode).
As shown in fig. 1, the blue film 5 and the quantum dot film 6 are sequentially stacked in the light emitting direction of the backlight module. The blue film 5 has a filtering function and can be used for blue light emitted by the light-emitting chip 3 to pass through; when the blue light passing through the blue film 5 reaches the quantum dot film 6, part of the blue light is converted into green light and red light by the quantum dots, and the unconverted blue light and the green light and the red light emitted by the quantum dots form white light together to form a display light source. In some application scenarios, the quantum dot film 6 may be a yellow quantum dot film 6, and the blue light passing through the blue film 5 may form white light after passing through the yellow quantum dot film 6.
As shown in fig. 2 and 3, the quantum dot film 6 includes a main body 601 and an outer edge 602 disposed around the periphery of the main body 601, the main body 601 correspondingly covers the blue film 5, the outer edge 602 correspondingly covers the gap between the blue film 5 and the sidewall 101, and the phosphor film 7 is disposed on the outer edge 602. The fluorescent glue film 7 has the same function as the quantum dot film 6, and the fluorescent powder in the fluorescent glue film 7 can be mixed with blue light to form white light.
In this embodiment, the outer edge portion 602 of the quantum dot film 6 is a ring structure disposed around the periphery of the main body portion 601, the main body portion 601 and the outer edge portion 602 of the quantum dot film 6 may be an integral structure, and in some application scenarios, the main body portion 601 and the outer edge portion 602 of the quantum dot film 6 may also be fixedly connected by being stuck together. In addition, the fluorescent glue film 7 can be manufactured and molded first and then cut, and the cut fluorescent glue film 7 can be fixed on the outer edge portion 602 of the quantum dot film 6 in a sticking manner.
As shown in fig. 3, the main body 601 of the quantum dot film 6 covers the blue film 5 correspondingly, which can absorb and convert the blue light emitted after passing through the blue film 5 into white light, and the outer edge 602 covers the gap between the blue film 5 and the sidewall 101 correspondingly. Consequently, the light that jets out through this clearance also can be absorbed and converted into white light by the outer edge portion 602 of quantum dot membrane 6, has prevented that the blue light from the revealing of clearance department, has improved the conversion rate of blue light to and the homogeneity of picture display behind the light-emitting, the condition that the edge sent out the blue light can not appear, and backlight unit's display effect is better. In addition, still be equipped with fluorescent glue membrane 7 on the outer edge portion 602 of quantum dot membrane 6, can further absorb the conversion to the blue light that jets out in the clearance through fluorescent glue membrane 7, the white light purity that sends after the conversion is higher for backlight unit marginal area's demonstration is also more excellent, has improved backlight unit's display effect.
In this embodiment, as shown in fig. 7, a width m1 of a vertical projection of the phosphor film 7 on the quantum dot film 6 is smaller than or equal to a width m2 of the outer edge portion 602. Therefore, the fluorescent glue film 7 can be conveniently installed, and can extend along the gap between the optical module and the frame body 1 to form gap filling, so that absorption and conversion of blue light at the edge are facilitated.
Further, the arrangement of the fluorescent glue film 7 can be, but is not limited to, the following examples:
in one example, as shown in fig. 3, the phosphor film 7 is located on a side of the quantum dot film 6 away from the light emitting chip 3. Blue light at the gap between the blue film 5 and the frame body 1 passes through the quantum dot film 6 and is absorbed again by the fluorescent glue film 7 to be converted into white light with higher purity, and the display effect is optimized.
In this example, the optical film group includes the blue film 5, the quantum dot film 6 and the brightness enhancement film that set up in proper order range upon range of along backlight unit's light-emitting direction, and as shown in fig. 3, the one side that quantum dot film 6 was kept away from to the fluorescence glued membrane 7 is less than the one side that the quantum dot film 6 was kept away from to the brightness enhancement film, or as shown in fig. 1, flushes with the one side that the quantum dot film 6 was kept away from to the brightness enhancement film. The fluorescent glue film 7 can extend into the gap between the brightness enhancement film and the frame body 1, and the light can be converted more sufficiently.
In another example, as shown in fig. 4, the fluorescent glue film 7 is located on one side of the quantum dot film 6 close to the light emitting chip 3. Blue light at the gap between the blue film 5 and the frame body 1 can be directly converted by the fluorescent glue film 7 and then converted by the quantum dot film 6, so that the conversion rate of converting the blue light at the gap into white light can be improved, and the light-emitting effect at the gap can be optimized.
In still another example, as shown in fig. 5, the phosphor film 7 includes a first phosphor film 7017 on a side of the quantum dot film 6 away from the light emitting chip 3, and a second phosphor film 7027 on a side of the quantum dot film 6 close to the light emitting chip 3. The first fluorescent adhesive film 7017 and the second fluorescent adhesive film 7027 may be an integral structure as shown in fig. 6, or may be separate structures on both sides as shown in fig. 5. The two sides of the outer edge portion 602 are provided with the fluorescent glue films 7, so that the optimization of the light source display effect at the gap is facilitated.
The fluorescent glue film of the present embodiment may be an integrated rectangular ring shape corresponding to the shape of the outer edge portion 602, as shown in fig. 8; alternatively, in some application scenarios, as shown in fig. 7, the fluorescent glue film 7 may also include a plurality of fluorescent glues, each fluorescent glue encloses to form a rectangular ring shape corresponding to the shape of the outer edge portion 602, for example, the quantum dot film 6 is rectangular, and the fluorescent glue film 7 may be four fluorescent glues respectively disposed corresponding to four sides of the rectangle.
In order to better position the quantum dot film 6, as shown in fig. 4, a step may be disposed at one end of the inner side of the sidewall 101 of the frame 1 near the bottom wall 102, and one surface of the outer edge 602 facing the back plate 2 is attached to the mesa of the step. The step forms the positioning of the quantum dot film 6 along the light-emitting direction of the backlight module, and meanwhile, because the area of the quantum dot film 6 is larger than that of the blue film 5, the arranged step can also form an accommodating space for accommodating the outer edge part 602 of the quantum dot film 6.
In this embodiment, as shown in fig. 1, the optical film group includes a diffusion film 4, a blue film 5, a quantum dot film 6, a first brightness enhancement film 8, and a second brightness enhancement film 9, and the diffusion film 4, the blue film 5, the quantum dot film 6, the first brightness enhancement film 8, and the second brightness enhancement film 9 are sequentially stacked in the light outgoing direction of the backlight module. Diffusion barrier 4, first membrane 8, the second membrane 9 that adds lustre to all can make the even gentle of light more close, have improved backlight unit's display effect.
Through the conversion of the main body part 601 and the outer edge part 602 of the quantum dot film 6 to light, the leakage of light from the gap between the optical module and the frame body 1 is prevented, the conversion rate of light is improved, the uniformity of light emission is improved, and the display effect of the backlight module is better. In addition, the fluorescent glue film 7 that sets up can further absorb the conversion to the light that jets out in the clearance, and the purity of demonstration light is higher, has optimized backlight unit marginal area's demonstration, has improved backlight unit's display effect.
The embodiment also provides a display screen which can be applied to but not limited to display screens such as televisions, displays, mobile terminals, wearable devices, advertising screens and signs. The display screen comprises a liquid crystal panel and the backlight module, wherein the liquid crystal panel covers the light emergent direction of the backlight module.
This display screen has good display effect, and its outer edge portion 602 through quantum dot membrane 6 among the backlight unit is to the absorption conversion of light, has prevented that light from the revealing of clearance department between optical module and the framework 1, has improved the conversion rate of light to and the homogeneity of light-emitting, make display effect better. In addition, the arranged fluorescent glue film 7 can further absorb and convert the light emitted from the gap, and the display of the edge area of the backlight module is optimized.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A backlight module, comprising:
the frame body comprises a bottom wall and a side wall, the bottom wall and the side wall are enclosed to form an accommodating cavity, a back plate and an optical film set are accommodated in the accommodating cavity, and the optical film set comprises a blue film and a quantum dot film;
the back plate is positioned on the bottom wall, a plurality of light-emitting chips are arranged on the back plate, and the blue film and the quantum dot film are sequentially stacked along the light-emitting direction of the backlight module; the quantum dot film comprises a main body part and an outer edge part arranged around the periphery of the main body part, the main body part correspondingly covers the blue film, the outer edge part correspondingly covers a gap between the blue film and the side wall, and a fluorescent glue film is arranged on the outer edge part.
2. The backlight module as claimed in claim 1, wherein a width of a vertical projection of the phosphor film on the quantum dot film is less than or equal to a width of the outer edge portion.
3. The backlight module as claimed in claim 1, wherein the phosphor film is disposed on a surface of the quantum dot film away from the light emitting chip.
4. The backlight module of claim 3, wherein the optical film assembly comprises a blue film, a quantum dot film and a brightness enhancement film sequentially stacked along a light emitting direction of the backlight module, and one surface of the fluorescent film, which is far away from the quantum dot film, is lower than one surface of the brightness enhancement film, which is far away from the quantum dot film, or is flush with one surface of the brightness enhancement film, which is far away from the quantum dot film.
5. The backlight module as claimed in claim 1, wherein the phosphor film is disposed on a surface of the quantum dot film adjacent to the light emitting chip.
6. The backlight module as claimed in claim 1, wherein the phosphor film comprises a first phosphor film on a surface of the quantum dot film away from the light emitting chip and a second phosphor film on a surface of the quantum dot film close to the light emitting chip, and the first phosphor film and the second phosphor film are integrated.
7. The backlight module according to any one of claims 1-6, wherein the phosphor film is an integral rectangular ring shape corresponding to the shape of the outer edge portion,
or the fluorescent glue film comprises a plurality of fluorescent glue bodies, and each fluorescent glue body is enclosed to form a rectangular ring shape corresponding to the shape of the outer edge part.
8. The backlight module according to any one of claims 1 to 6, wherein a step is disposed at an end of the inner side of the sidewall close to the bottom wall, and a surface of the outer edge facing the back plate is disposed on a mesa of the step.
9. The backlight module as claimed in any of claims 1-6, wherein the optical film set comprises a diffuser film, the blue film, the quantum dot film, a first brightness enhancement film, and a second brightness enhancement film, and the diffuser film, the blue film, the quantum dot film, the first brightness enhancement film, and the second brightness enhancement film are sequentially stacked along a light emitting direction of the backlight module.
10. A display screen, comprising a liquid crystal panel and the backlight module as claimed in any one of claims 1 to 9, wherein the liquid crystal panel covers the light-emitting direction of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222144723.1U CN218413146U (en) | 2022-08-15 | 2022-08-15 | Backlight module and display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222144723.1U CN218413146U (en) | 2022-08-15 | 2022-08-15 | Backlight module and display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218413146U true CN218413146U (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222144723.1U Active CN218413146U (en) | 2022-08-15 | 2022-08-15 | Backlight module and display screen |
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| Country | Link |
|---|---|
| CN (1) | CN218413146U (en) |
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2022
- 2022-08-15 CN CN202222144723.1U patent/CN218413146U/en active Active
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