CN112631018A - Direct type backlight module, liquid crystal module and display device - Google Patents
Direct type backlight module, liquid crystal module and display device Download PDFInfo
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- CN112631018A CN112631018A CN202011558361.XA CN202011558361A CN112631018A CN 112631018 A CN112631018 A CN 112631018A CN 202011558361 A CN202011558361 A CN 202011558361A CN 112631018 A CN112631018 A CN 112631018A
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- light
- light source
- type backlight
- backlight module
- direct type
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 23
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 description 16
- 230000008859 change Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000012788 optical film Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a direct type backlight module, a liquid crystal module and a display device, wherein the direct type backlight module comprises a printed circuit board, a reflector plate arranged on the printed circuit board, and a light-emitting assembly, wherein the light-emitting assembly comprises a light source and dots, the reflector plate is provided with through holes, the light source and the dots are installed on the printed circuit board through the through holes, the dots and the light source are arranged at intervals, and a part of emergent light rays emitted by the light source are reflected by the dots to reduce the light-emitting angle. According to the invention, the reflection angle of the large-angle light emitted by the light source can be changed after the large-angle light is reflected by the mesh points, so that the large-angle light is reflected at the position above the light source, the light emitting efficiency of the light source can be improved, the light loss is reduced, and the brightness above the light source is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a direct type backlight module, a liquid crystal module and a display device.
Background
With the pursuit of the market for the image quality and the thinning of the display device, the direct type backlight scheme becomes more and more important, and the commonly used light source is an LED lamp, wherein an LED chip is smaller, such as 0620 and 0509 (unit mil in size and about 0.1mm in thickness), and the light source does not have a bracket and emits light in five surfaces. As shown in fig. 1, the reflective sheet 20 ' is generally disposed on the printed circuit board 30 ', and the reflective sheet 20 ' is formed with a through hole 50 ' so that the light source 41 ' is mounted on the printed circuit board 30 ' through the through hole 50 ', and thus, the light rays emitted from the light source 41 ' at a plurality of angles are directly emitted to the diffusion plate 10 '. This structure has the following drawbacks: the light source 41' emits light in multiple surfaces, the light emitting angle is large, the transmission angle of edge light in the optical light mixing cavity is large, and the distance is long; further, the edge light is repeatedly reflected and absorbed in the optical light mixing cavity formed between the diffusion plate 10 ' and the reflection sheet 20 ', thereby causing a low luminous efficiency of the light source 41 '.
Disclosure of Invention
The invention mainly aims to provide a direct type backlight module, a liquid crystal module and a display device, and aims to solve the technical problem that a light source in the direct type backlight module in the prior art is low in luminous efficiency.
In order to achieve the above object, the present invention provides a direct type backlight module, which includes a printed circuit board, a reflector plate disposed on the printed circuit board, and a light emitting assembly, where the light emitting assembly includes a light source and dots, the reflector plate is provided with a through hole, the light source and the dots are both installed on the printed circuit board through the through hole, the dots and the light source are disposed at intervals, and a part of emergent light emitted by the light source is reflected by the dots to reduce an emergent angle.
Preferably, the number of the mesh points is multiple, and the plurality of mesh points are arranged around the periphery of the light source at intervals.
Preferably, the minimum distance from the convex surface of the dot to the light source is 0.5mm-1.5 mm.
Preferably, the maximum distance from the convex surface of the mesh point to the printed circuit board is 0.2mm-0.4 mm.
Preferably, the minimum distance from the convex surface of the screen dot to the inner peripheral surface of the through hole is 0.2mm-0.5 mm.
Preferably, the number of the through holes and the number of the light emitting assemblies are both multiple and in one-to-one correspondence, and the through holes are arranged at intervals.
Preferably, the light source is an LED lamp.
Preferably, the direct type backlight module further comprises a diffusion plate disposed above the reflection sheet.
Preferably, the dots are hemispherical bulges, and the convex surfaces of the dots face to one side of the diffusion plate.
The invention also provides a liquid crystal module which comprises a direct type backlight module and a liquid crystal display panel arranged above the direct type backlight module, wherein the direct type backlight module is the direct type backlight module.
In addition, the invention also provides a display device, which comprises a shell and the liquid crystal module arranged in the shell, wherein the liquid crystal module is the liquid crystal module.
According to the technical scheme, the reflecting sheet is arranged on the printed circuit board, the through hole is formed in the reflecting sheet, the light emitting component penetrates through the through hole to be installed on the printed circuit board, and the mesh points in the light emitting component and the light source are arranged at intervals. Like this, the wide-angle light that the light source sent can change reflection angle after the net point reflection, becomes the reflection light of wide-angle to the reflection light of small angle to make wide-angle light reduce reflection angle after reflect in the light source top, thereby can improve the luminous efficacy of light source, reduce light loss, promote the luminance of light source top.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of light reflection of a light source in a conventional direct-type backlight module;
fig. 2 is a schematic view of light reflection of a light source in a direct-type backlight module according to an embodiment of the invention.
FIG. 1 is a drawing illustrating:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10’ | Diffusion plate | 41’ | Light source |
| 20’ | Reflector plate | 50’ | Through hole |
| 30’ | Printed circuit board |
FIG. 2 is a drawing illustrating:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
41 | |
| 20 | |
42 | |
| 30 | Printed |
50 | Through |
| 40 | Light emitting assembly |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The description of the orientations of "up", "down", "left", "right", etc. in the present invention, with reference to the orientation shown in fig. 2, is merely for explaining the relative positional relationship between the components in the attitude shown in fig. 2, and if the particular attitude is changed, the directional indication is changed accordingly.
The invention provides a direct type backlight module.
As shown in fig. 2, in an embodiment of the present invention, the direct type backlight module includes a printed circuit board 30 and a reflective sheet 20 disposed on the printed circuit board 30, and further includes a light emitting assembly 40, the light emitting assembly 40 includes a light source 41 and a dot 42, the reflective sheet 20 is provided with a through hole 50, the light source 41 and the dot 42 are both mounted on the printed circuit board 30 through the through hole 50, the dot 42 and the light source 41 are disposed at an interval, and a part of emergent light rays emitted by the light source 41 is reflected by the dot 42 to reduce a light emergent angle.
The direct type backlight module of the present embodiment includes a printed circuit board 30, a reflective sheet 20 is disposed on the printed circuit board 30, a through hole 50 is disposed on the reflective sheet 20, a light emitting assembly 40 is mounted on the printed circuit board 30 through the through hole 50, and dots 42 of the light emitting assembly 40 are spaced from a light source 41. Therefore, after the large-angle light emitted by the light source 41 is emitted, the reflection angle of the light is changed when the light touches the convex surface of the dot 42, the large-angle reflection light is changed into the small-angle reflection light, and the large-angle light is reflected at the position 0 above the light source 41, so that the luminous efficiency of the light source 41 can be improved, the light loss is reduced, and the brightness above the light source 41 is improved. The dots 42 are preferably formed on the reflective sheet 20 by spraying or printing using ink or other material having a lower reflectivity than the reflective sheet 20.
The number of the dots 42 is plural, and the plural dots 42 are arranged around the outer periphery of the light source 41 at intervals. In a preferred embodiment, a plurality of dots 42 are uniformly spaced around the periphery of the light source 41, so that the light emitted from the light source 41 at various angles can be reflected by the dots 42, thereby improving the luminous efficiency per unit area and further improving the brightness above the light source 41.
Wherein, the minimum distance from the convex surface of the lattice point 42 to the light source 41 is 0.5mm-1.5 mm. In a preferred embodiment, in order to change the reflection angle of the dots 42 to the light of the light source 41 with a large angle, a certain distance is required between the connection point of the dots 42 and the printed circuit board 30 and the light source 41. In actual operation, the light source 41 is regarded as a point, and therefore the minimum distance is the minimum value of the line segment connecting the arc-shaped periphery of the convex surface of the dot 42 to the point of the light source 41. When the minimum distance from the convex surface of the dot 42 to the light source 41 is less than 0.5mm, the large-angle light near the joint of the dot 42 and the printed circuit board 30 is directly blocked by the convex surface of the dot 42, and the light is lost; when the minimum distance from the convex surface of the dot 42 to the light source 41 is greater than 1.5mm, the distance between the dot 42 and the light source 41 is too large, and a part of light with a large angle is directly emitted to the diffusion plate 10 without further reflection of the dot 42, so that the improvement of the light emitting efficiency of the light source 41 is influenced to a certain extent.
And the maximum distance from the convex surface of the dot 42 to the printed circuit board 30 is 0.2mm-0.4 mm. In a preferred embodiment, the maximum distance is the maximum of the vertical line between the curved periphery of the convex side of the dot 42 and the printed circuit board 30. In order to make the dot 42 reflect the large-angle reflection lines of the light source 41 to a certain extent, the distance between the uppermost bump of the dot 42 and the printed circuit board 30 is set to be 0.2mm-0.4 mm. At this time, the large-angle light emitted by the light source 41 is reflected by the convex surface of the dot 42, so that the reflection angle is reduced, and the light is reflected by the diffusion plate 10, therefore, the distance in this range can ensure that the reflection angle of the large-angle light is changed, so that the brightness above the light source 41 is improved, the light emitting efficiency of the light source 41 is improved, and the problem that the utilization rate of the light source 41 is not high due to light concentration or divergence is solved. When the distance from the highest point of the convex surface of the dot 42 to the printed circuit board 30 is less than 0.2mm, the convex surface of the dot 42 is too low, and the large-angle light emitted by the light source 41 cannot be reflected by the convex surface of the dot 42, so that the problem of changing the angle of the large-angle light cannot be solved; when the distance from the highest point of the convex surface of the dot 42 to the printed circuit board 30 is greater than 0.4mm, the convex surface of the dot 42 is too high, and the large-angle light emitted by the light source 41 is reflected by the dot 42 and then is reflected at the same position of the diffusion plate 10 in a concentrated manner, so that a part without light coverage on the diffusion plate 10 may appear, and the brightness is not uniform.
Further, the minimum distance from the convex surface of the dot 42 to the inner peripheral surface of the through hole 50 is 0.2mm to 0.5 mm. The minimum distance is the minimum value of the line connecting the arc-shaped outer peripheral surface of the convex surface of the dot 42 and the inner peripheral surface of the through hole 50. The inner circumferential surface of the through hole 50 refers to a side of the through hole 50 facing the dots 42. In a preferred embodiment, in the use process of the direct type backlight module, the reflective sheet 20 may cause material expansion due to the rise of the external temperature, and the expansion of the reflective sheet 20 may cause the inner diameter of the through hole 50 to be reduced, so that the inner side wall of the through hole 50 expands toward the dots 42, and if the dots 42 are closely attached to the inner side wall of the through hole 50, the inner side wall of the through hole 50 may press the dots 42 after the expansion of the reflective sheet 20, thereby causing damage to the dots 42; therefore, the raised surface of the dot 42 is kept at a certain distance from the inner circumferential surface of the through hole 50, and according to the result of the trial and error of the expansion rate of the reflective sheet 20, the distance between the connection point of the dot 42 and the printed circuit board 30 and the inner circumferential surface of the through hole 50 is set to be 0.2mm to 0.5mm, and when the distance is greater than 0.5mm, the reflective sheet 20 is wasted and the reflection effect is reduced due to the excessively large diameter of the through hole 50.
In addition, as shown in fig. 2, the number of the through holes 50 and the number of the light emitting assemblies 40 are both plural and correspond to each other, and the plural through holes 50 are arranged at intervals. In a preferred embodiment, in order to make the brightness range above the diffusion plate 10 wider, a plurality of light emitting assemblies 40 are provided, a plurality of through holes 50 are formed at regular intervals in the left and right extending direction of the reflection sheet 20, and one light emitting assembly 40 is provided in each through hole 50, so that the brightness above each light source 41 can be improved, thereby improving the brightness of the whole module. The light source 41 is an LED lamp. In other embodiments, the light source 41 may be an LED lamp bead including, but not limited to, a mini/micro LED lamp.
In addition, the direct type backlight module further includes a diffusion plate 10, a back plate (not shown) and an optical film (not shown), wherein the printed circuit board 30 is disposed inside the back plate, the back plate is disposed around the periphery of the direct type backlight module, and the back plate is used for enhancing the strength of the backlight module. A diffusion plate 10 is disposed above the reflection sheet 20, and the diffusion plate 10 and the reflection sheet 20 are spaced apart from each other to form a light mixing cavity for mixing light. The optical film is disposed on a side of the diffusion plate 10 away from the reflection sheet 20, and light reflected by the diffusion plate 10 is emitted from the optical film, so that light can be seen above the backlight module.
It should be noted that the dots 42 in this embodiment are hemispherical protrusions, and the protrusion surface of the dots 42 faces one side of the diffuser plate 10. In a preferred embodiment, the dots 42 are formed as hemispherical protrusions, the convex surfaces of the hemispherical protrusions form a smooth arc, the light emitted by the light source 41 has multiple angles, and the convex surfaces of the hemispherical protrusions can change the large-angle light emitted from any angle, so that the light angle change range of the light source 41 is wider. In other embodiments, the shape of the screen dots 42 includes, but is not limited to, spherical, elliptical, square, etc., and the radian or angle of the dots 42 is specifically adjusted according to the specific scheme.
The invention also provides a liquid crystal module, which comprises a direct type backlight module and a liquid crystal display panel arranged above the direct type backlight module, wherein the direct type backlight module is the direct type backlight module. The specific structure of the liquid crystal module refers to the above embodiments, and since the liquid crystal module adopts all technical solutions of the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and are not repeated herein.
In addition, the invention also provides a display device which can be a display device such as a television, a display, an advertising machine and the like, and the display device comprises a shell and a liquid crystal module arranged in the shell, wherein the liquid crystal module is the liquid crystal module. Since the liquid crystal module adopts all the technical solutions of the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and are not described in detail herein.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a straight following formula backlight unit, its includes printed circuit board and sets up reflector plate on the printed circuit board, its characterized in that, straight following formula backlight unit still includes light-emitting component, light-emitting component includes light source and site, the through-hole has been seted up to the reflector plate, the light source with the site all passes the through-hole is installed on the printed circuit board, the site with the light source interval sets up, some emergent light that the light source sent reduces light-emitting angle after the site reflects.
2. The direct-type backlight module as claimed in claim 1, wherein the number of the dots is plural, and the dots are spaced around the periphery of the light source.
3. The direct type backlight module as claimed in claim 1, wherein the minimum distance from the convex surface of the dot to the light source is 0.5mm-1.5 mm.
4. The direct type backlight module according to claim 3, wherein the maximum distance from the convex surface of the dot to the printed circuit board is 0.2mm-0.4 mm.
5. The direct type backlight module according to claim 4, wherein the minimum distance from the convex surface of the dot to the inner circumferential surface of the through hole is 0.2mm-0.5 mm.
6. The direct type backlight module according to any one of claims 1 to 5, wherein the number of the through holes and the number of the light emitting assemblies are both plural and in one-to-one correspondence, and the plural through holes are arranged at intervals.
7. The direct type backlight module according to any one of claims 1 to 5, further comprising a diffuser plate disposed over the reflective sheet.
8. The direct type backlight module as claimed in claim 7, wherein the dots are hemispherical protrusions, and the protruded surface of the dots faces one side of the diffuser plate.
9. A liquid crystal module comprising a direct type backlight module and a liquid crystal display panel disposed above the direct type backlight module, wherein the direct type backlight module is as claimed in any one of claims 1 to 8.
10. A display device, comprising a housing and a liquid crystal module disposed in the housing, wherein the liquid crystal module is the liquid crystal module according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558361.XA CN112631018A (en) | 2020-12-24 | 2020-12-24 | Direct type backlight module, liquid crystal module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558361.XA CN112631018A (en) | 2020-12-24 | 2020-12-24 | Direct type backlight module, liquid crystal module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112631018A true CN112631018A (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011558361.XA Pending CN112631018A (en) | 2020-12-24 | 2020-12-24 | Direct type backlight module, liquid crystal module and display device |
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| Country | Link |
|---|---|
| CN (1) | CN112631018A (en) |
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|---|---|---|---|---|
| JP2001297613A (en) * | 2000-04-14 | 2001-10-26 | Koichi Matsui | Directly under illumination device |
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| CN202469681U (en) * | 2012-02-06 | 2012-10-03 | 京东方科技集团股份有限公司 | Light emitting diode (LED) string |
| CN203052397U (en) * | 2012-12-07 | 2013-07-10 | 康佳集团股份有限公司 | Straight-down type backlight module, liquid crystal module and liquid crystal displaying device |
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| CN204229084U (en) * | 2014-10-10 | 2015-03-25 | 江苏毅昌科技有限公司 | New type reflection chip architecture |
| US20190227216A1 (en) * | 2018-01-24 | 2019-07-25 | Huizhou China Star Optoelectronics Technology Co., Ltd. | Direct type reflective sheet structure and backlight module |
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2020
- 2020-12-24 CN CN202011558361.XA patent/CN112631018A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001297613A (en) * | 2000-04-14 | 2001-10-26 | Koichi Matsui | Directly under illumination device |
| KR20060060833A (en) * | 2004-12-01 | 2006-06-07 | 엘지.필립스 엘시디 주식회사 | Backlight assembly and liquid crystal display device having the same |
| CN101358713A (en) * | 2007-08-01 | 2009-02-04 | 奇美电子股份有限公司 | Directly-down back light module unit and LCD using the directly-down back light module unit |
| CN202469681U (en) * | 2012-02-06 | 2012-10-03 | 京东方科技集团股份有限公司 | Light emitting diode (LED) string |
| CN203052397U (en) * | 2012-12-07 | 2013-07-10 | 康佳集团股份有限公司 | Straight-down type backlight module, liquid crystal module and liquid crystal displaying device |
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| US20190227216A1 (en) * | 2018-01-24 | 2019-07-25 | Huizhou China Star Optoelectronics Technology Co., Ltd. | Direct type reflective sheet structure and backlight module |
| CN209460537U (en) * | 2019-02-28 | 2019-10-01 | 青岛海信电器股份有限公司 | A kind of lamp bar, backlight module and display equipment |
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