CN108957859B - Backlight module and liquid crystal display - Google Patents
Backlight module and liquid crystal display Download PDFInfo
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- CN108957859B CN108957859B CN201810920100.4A CN201810920100A CN108957859B CN 108957859 B CN108957859 B CN 108957859B CN 201810920100 A CN201810920100 A CN 201810920100A CN 108957859 B CN108957859 B CN 108957859B
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- plate
- light
- locking
- backlight module
- width direction
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- 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
- G02F1/133608—Direct backlight including particular frames or supporting means
Abstract
The invention discloses a backlight module and a liquid crystal display. The backlight module comprises: the luminous module comprises a fixing plate and a plurality of luminous groups, wherein each luminous group comprises a plurality of back plates and luminous assemblies arranged on each back plate, and the back plates are detachably arranged on the fixing plate. The invention discloses a backlight module and a liquid crystal display.A plurality of light-emitting groups are arranged on a fixing plate, a back plate of each light-emitting group is detachably arranged on the fixing plate, and when the light-emitting components of the light-emitting groups are damaged, the corresponding back plate can be detached to replace the damaged light-emitting components, so that all the light-emitting groups do not need to be replaced, the replacement efficiency can be improved, the intact light-emitting groups can be continuously utilized, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module and a liquid crystal display.
Background
The backlight is an essential device in the liquid crystal display, and the common types of the backlight are a side-in type backlight and a direct type backlight. The direct type backlight source is characterized in that Light Emitting Diodes (LEDs) in the direct type backlight source are arranged in two dimensions, and the number of the LED light bars is large, so that when the backlight brightness requirement of a Liquid Crystal Display (LCD) is high, the direct type backlight design is adopted.
The LED in the straight following formula backlight usually makes into the lamp strip form, arranges a plurality of lamp strips in proper order the back to fix a plurality of lamp strips on a monoblock backplate, in order to conveniently supply power for the LED. The current back plate is an integrated design, so that once a certain part in the LCD backlight module is in a problem, the back plate needs to be disassembled and replaced, especially when an LED lamp strip is in a problem, for example, when a certain LED lamp strip is not bright, the backlight source needs to be completely disassembled, time and labor are consumed, and other lamp strips which are not damaged cannot be continuously used, so that the material waste is caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a backlight module and a liquid crystal display which are beneficial to disassembling and replacing a damaged light-emitting component.
In order to achieve the purpose, the invention adopts the following technical scheme:
a backlight module includes: the luminous module comprises a fixed plate and a plurality of luminous groups, wherein each luminous group comprises a plurality of back plates and a luminous assembly arranged on each back plate, and the back plates are detachably arranged on the fixed plate; the backboard is in a long strip shape, the backboard in each light-emitting group is arranged in parallel along the width direction of the backboard, the arrangement modes of the backboards in each light-emitting group are the same, the backboard comprises a long strip-shaped top plate and a first connecting part and a second connecting part which are respectively formed by bending two opposite sides of the top plate along the width direction of the top plate, the first connecting part and the second connecting part are detachably arranged on the fixed plate, and the light-emitting components are arranged on the surface of the top plate, which faces away from the fixed plate; the light-emitting component comprises a light bar and a reflector plate, the light bar comprises a printed circuit board arranged on the top plate and a light-emitting diode (LED) connected to the printed circuit board, the reflector plate is arranged on the printed circuit board, the position of the reflector plate relative to the LED is provided with a first through hole exposed out of the LED chip, the reflector plate is arranged along the opposite two side faces of the width direction of the top plate, the opposite two side faces of the width direction of the top plate are inclined planes, and the adjacent side faces of the two adjacent reflector plates are spliced with each other.
Preferably, the first connecting portion includes a first inclined plate bent from one of the opposite sides of the top plate and a first flat plate bent from a free side of the first inclined plate, the second connecting portion includes a second inclined plate bent from the other of the opposite sides of the top plate and a second flat plate bent from a free side of the second inclined plate, and the first flat plate and the second flat plate are detachably mounted on the fixing plate.
Preferably, if the plurality of light emitting groups are arranged in parallel along the width direction of the back plate, the first flat plate of one of the two adjacent back plates and the second flat plate of the other of the two adjacent back plates are overlapped;
the backlight module further comprises: a first locking member for locking the first and second plates to be stacked to the fixing plate; a second locking attachment for locking the second plate that is not overlapped with the first plate to the fixing plate; and a second locking attachment for locking the first plate, which is not overlapped with the second plate, to the fixing plate.
Preferably, if the plurality of light emitting groups are arranged in an array along the length direction and the width direction of the back plate, the first flat plate of one of the two adjacent back plates in the width direction and the second flat plate of the other of the two adjacent back plates are overlapped;
the backlight module further comprises: a first locking member for locking the first and second plates to be stacked to the fixing plate; a second locking attachment for locking the second plate that is not overlapped with the first plate to the fixing plate; and a second locking attachment for locking the first plate, which is not overlapped with the second plate, to the fixing plate.
Preferably, the light emitting assembly further includes a supporting plate, the supporting plate is disposed between the reflector plate and the printed circuit board, the supporting plate has a second through hole opposite to the first through hole, and a dimension of the supporting plate in a width direction of the top plate is equal to or slightly smaller than a dimension of the reflector plate in the width direction of the top plate.
The invention also discloses a liquid crystal display comprising any one of the backlight modules.
Has the advantages that: the invention discloses a backlight module and a liquid crystal display.A plurality of light-emitting groups are arranged on a fixing plate, a back plate of each light-emitting group is detachably arranged on the fixing plate, and when the light-emitting components of the light-emitting groups are damaged, the corresponding back plate can be detached to replace the damaged light-emitting components, so that all the light-emitting groups do not need to be replaced, the replacement efficiency can be improved, the intact light-emitting groups can be continuously utilized, and the cost is saved.
Drawings
FIG. 1 is a cross-sectional view of a backlight module according to an embodiment of the invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, the backlight assembly according to the embodiment of the present invention includes a fixing plate 10 and a plurality of light emitting groups 20. Wherein, each light emitting group 20 comprises a plurality of back plates 21 and a light emitting assembly 22 mounted on each back plate, and the back plates 21 are detachably mounted on the fixing plate 10. Thus, the plurality of light emitting groups 20 jointly emit light to provide backlight, when one light emitting component 22 is damaged, the corresponding back plate 21 can be detached, and the damaged light emitting component 22 can be replaced without detaching all the light emitting groups, so that the replacement efficiency can be improved, the undamaged light emitting components can be reserved, and the cost is saved.
As a preferred embodiment, the shape of the back plate 21 is a long strip, the back plates in each light emitting group 20 are arranged in parallel along the width direction thereof, and the arrangement manner of the back plates 21 in the respective light emitting groups 20 is the same. Further, as a preferred embodiment, the back plate 21 includes a top plate 211 having an elongated shape, and a first connection portion 212 and a second connection portion 213 formed by bending the top plate 211 along two opposite sides of the top plate 211 in the width direction, the first connection portion 212 and the second connection portion 213 are detachably mounted on the fixing plate 20, and the light emitting assembly 22 is mounted on a surface of the top plate 211 facing away from the fixing plate 10.
Further, the first connection portion 212 includes a first inclined plate 212a bent from one of opposite sides of the top plate 211 and a first flat plate 212b bent from a free end of the first inclined plate 212 a. The second connection portion 213 includes a second inclined plate 213a formed by bending the other of the opposite sides of the top plate 211 and a second flat plate 213b formed by bending the free end of the second inclined plate 213 a. The first plate 212b and the second plate 213b are detachably mounted on the fixed plate 10. This shape of the back sheet 21 provides good support strength to prevent collapse of the light emitting assembly during shipping or during use. In addition, the backboard of the bending structure has certain elasticity, and the problem that the backboard is deformed due to the fact that the backboard cannot rebound after being bent can be avoided.
Furthermore, the included angle between the first inclined plate 212a and the top plate 211 is an obtuse angle, the included angle between the second inclined plate 213a and the top plate 211 is an obtuse angle, the first flat plate 212b and the second flat plate 213b extend in opposite directions, and the whole back plate 21 is in a trapezoidal shape, so that the support strength and the elasticity of the back plate 21 can be further improved.
The following describes the disassembling and assembling of the back plate 21 in two embodiments.
The first mode is as follows:
when the plurality of light emitting groups 20 are arranged in parallel in the width direction of the back plate 21, that is, all the back plates 21 are arranged in parallel in the width direction thereof, the first flat plate 212b of one of the adjacent two back plates 21 and the second flat plate 213b of the other of the adjacent two back plates 21 are overlapped.
Further, the backlight module further includes a first locking member 31 and a second locking member 32, and the first locking member 31 is used for locking the stacked first flat plate 212b and second flat plate 213b to the fixing plate 10. The second locking attachment 32 is used to lock the second flat plate 213b, which is not overlapped with the first flat plate 212b, to the fixed plate 10, and the second locking attachment 32 is used to lock the first flat plate 212b, which is not overlapped with the second flat plate 213b, to the fixed plate 10.
When one of the light emitting assemblies 22 is damaged, the corresponding first locking piece 31 or the second locking piece 32 of the back plate 21 is removed, the back plate 21 is pulled out along the length direction of the back plate 21, so that a new light emitting assembly 22 is replaced, then the back plate 21 provided with the new light emitting assembly 22 is inserted into the original installation position along the length direction of the back plate, and finally the corresponding locking piece is installed.
On one hand, the back plates 21 are spliced together, so that the integral supporting strength of the back plates 21 is improved; on the other hand, since the back plates 21 are partially overlapped in the horizontal direction, the occupied space of each light emitting group 20 is reduced, and more light emitting groups 20 can be arranged on the fixing plate 10, thereby improving the space utilization rate.
Further, a gap is formed between the first flat plate 212b and the second flat plate 213b stacked on the first flat plate 212b, and the size of the gap is 1-10 mm, so that when the corresponding back plate 21 is removed, the friction force between the back plate 21 and the adjacent back plate 21 can be reduced, and the removal is convenient.
The second mode is as follows:
when the plurality of light emitting groups 20 are arrayed along the width direction and the length direction of the back sheet 21, the first flat plate 212b of one of the two adjacent back sheets 21 in the width direction and the second flat plate 213b of the other of the two adjacent back sheets 21 are superposed.
Further, the backlight module further includes a first locking member 31 and a second locking member 32, and the first locking member 31 is used for locking the stacked first flat plate 212b and second flat plate 213b to the fixing plate 10. The second locking attachment 32 is used to lock the second flat plate 213b, which is not overlapped with the first flat plate 212b, to the fixed plate 10, and the second locking attachment 32 is used to lock the first flat plate 212b, which is not overlapped with the second flat plate 213b, to the fixed plate 10.
When one light-emitting component 22 located in the central area is damaged, the first locking piece 31 or the second locking piece 32 on the corresponding back plate 21 is removed, then the other back plates 21 in the same length direction as the damaged light-emitting component 22 are removed so as to leave a space for the damaged light-emitting component 22, then the corresponding back plates 21 are pulled out of the back plate 21 along the length direction thereof to replace the new light-emitting component 22, then the back plates 21 provided with the new light-emitting components 22 are inserted into the original installation positions along the length direction thereof, and finally the other back plates 21 are installed.
Specifically, as a preferred embodiment, the light emitting assembly 22 includes a light bar 221 and a reflective sheet 222, the light bar 221 includes a circuit board 221a disposed on the top plate 211 and an LED chip 221b electrically connected to the printed circuit board 221a, the reflective sheet 222 is disposed on the printed circuit board 221a, and a first through hole is disposed on a position of the reflective sheet 222 opposite to the LED chip 221b, and the first through hole exposes the LED chip 221 b. Further, the light bar 221 further includes a lens 221c, and the lens 221c covers the LED chip 221 b.
Further, the light emitting assembly 20 further includes a supporting plate 23, the supporting plate 23 is disposed between the reflective sheet 222 and the printed circuit board 221a, a second through hole is opened on a position of the supporting plate 23 opposite to the LED chip 221b, and the LED chip 221b is exposed from the second through hole. From the viewpoint of design cost, the printed circuit board 221a is narrow in size, that is, the printed circuit board 221a is smaller in size than the reflective sheet 222, so that the edge of the reflective sheet 222 is liable to risk being collapsed downward, thereby causing the optical quality to be liable to suffer from the bright-dark cut. By adding the support plate 23 so that the reflective sheet 222 is carried on the support plate 23, the risk of the edge of the reflective sheet 222 collapsing can be prevented.
Further, the dimension of the support plate 23 in the width direction of the top plate is equal to or slightly smaller than the dimension of the reflection sheet 222 in the width direction of the top plate. As the preferred embodiment, the material of the supporting plate 23 is preferably a metal material, and the supporting plate 23 made of the material has the characteristics of no water absorption and small thermal expansion, so that the deformation of the backlight module when the backlight module is used in a high-temperature and humid environment can be avoided, and meanwhile, the supporting plate has enough strength, and the phenomenon that the supporting plate at the splicing part collapses to cause the collapse of the reflecting sheet to form a dark space is avoided.
Further, both opposite side surfaces of the reflective sheet 222 in the width direction of the top plate 211 are inclined surfaces, and the inclined surfaces of the reflective sheet 222 and the inclined surfaces of the adjacent reflective sheets 222 are spliced with each other, so that light leakage at the spliced positions of the reflective sheets 222 can be reduced.
Specifically, the backlight module of this embodiment further includes a control board and an adapter board, the control board is used for connecting a power supply, the adapter board is electrically connected to the control board, and the adapter board is disposed on a surface of the fixing board 10 facing away from the light emitting assembly 20. The circuit boards 221a of the light emitting groups 20 are electrically connected to the interposer, and the printed circuit boards 221a are connected in parallel. When a certain light bar 221 is damaged, the power is cut off from the back of the fixing plate 10, so that the circuit of the corresponding light emitting group 20 is cut off, and the corresponding light emitting group 20 is conveniently detached.
According to the backlight module provided by the embodiment of the invention, the plurality of light emitting groups are arranged on the fixing plate, the back plate of each light emitting group is detachably arranged on the fixing plate, and when the light emitting assemblies of the light emitting groups are damaged, the corresponding back plate can be detached to replace the damaged light emitting assemblies, so that all the light emitting groups do not need to be replaced, the replacement efficiency can be improved, the intact light emitting groups can be continuously utilized, and the cost is saved.
The invention also provides a liquid crystal display which comprises a display panel and the backlight module.
Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents, and that such changes and modifications are intended to be within the scope of the invention.
Claims (6)
1. A backlight module, comprising: the luminous module comprises a fixed plate and a plurality of luminous groups, wherein each luminous group comprises a plurality of back plates and a luminous assembly arranged on each back plate, and the back plates are detachably arranged on the fixed plate; the backboard is in a long strip shape, the backboard in each light-emitting group is arranged in parallel along the width direction of the backboard, the arrangement modes of the backboards in each light-emitting group are the same, the backboard comprises a long strip-shaped top plate and a first connecting part and a second connecting part which are respectively formed by bending two opposite sides of the top plate along the width direction of the top plate, the first connecting part and the second connecting part are detachably arranged on the fixed plate, and the light-emitting components are arranged on the surface of the top plate, which faces away from the fixed plate; the light-emitting component comprises a light bar and a reflector plate, the light bar comprises a printed circuit board arranged on the top plate and a light-emitting diode (LED) connected to the printed circuit board, the reflector plate is arranged on the printed circuit board, the position of the reflector plate relative to the LED is provided with a first through hole exposed out of the LED chip, the reflector plate is arranged along the opposite two side faces of the width direction of the top plate, the opposite two side faces of the width direction of the top plate are inclined planes, and the adjacent side faces of the two adjacent reflector plates are spliced with each other.
2. A backlight module according to claim 1, wherein the first connecting portion comprises a first inclined plate bent from one of the opposite sides of the top plate and a first flat plate bent from a free side of the first inclined plate, the second connecting portion comprises a second inclined plate bent from the other of the opposite sides of the top plate and a second flat plate bent from a free side of the second inclined plate, and the first flat plate and the second flat plate are detachably mounted on the fixing plate.
3. The backlight module according to claim 2, wherein if the plurality of light emitting groups are arranged in parallel along the width direction of the back plates, the first flat plate of one of the two adjacent back plates and the second flat plate of the other of the two adjacent back plates are overlapped;
the backlight module further comprises: a first locking member for locking the first and second plates to be stacked to the fixing plate; a second locking attachment for locking the second plate that is not overlapped with the first plate to the fixing plate; and a second locking attachment for locking the first plate, which is not overlapped with the second plate, to the fixing plate.
4. The backlight module according to claim 2, wherein if the plurality of light emitting groups are arrayed along the length direction and the width direction of the back plates, the first plate of one of the two adjacent back plates in the width direction and the second plate of the other of the two adjacent back plates are overlapped;
the backlight module further comprises: a first locking member for locking the first and second plates to be stacked to the fixing plate; a second locking attachment for locking the second plate that is not overlapped with the first plate to the fixing plate; and a second locking attachment for locking the first plate, which is not overlapped with the second plate, to the fixing plate.
5. The backlight module according to claim 1, wherein the light emitting assembly further comprises a support plate disposed between the reflector plate and the printed circuit board, the support plate having a second through hole opposite to the first through hole, and a dimension of the support plate in the width direction of the top plate is equal to or slightly smaller than a dimension of the reflector plate in the width direction of the top plate.
6. A liquid crystal display comprising the backlight module of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810920100.4A CN108957859B (en) | 2018-08-14 | 2018-08-14 | Backlight module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810920100.4A CN108957859B (en) | 2018-08-14 | 2018-08-14 | Backlight module and liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108957859A CN108957859A (en) | 2018-12-07 |
| CN108957859B true CN108957859B (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810920100.4A Active CN108957859B (en) | 2018-08-14 | 2018-08-14 | Backlight module and liquid crystal display |
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| CN (1) | CN108957859B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526185A (en) * | 2009-04-22 | 2009-09-09 | 上海广电光电子有限公司 | LED backlight module |
| CN202253221U (en) * | 2011-10-25 | 2012-05-30 | 京东方科技集团股份有限公司 | Backlight module |
| JP5964132B2 (en) * | 2012-05-23 | 2016-08-03 | 船井電機株式会社 | Display device |
| JP6191144B2 (en) * | 2013-01-30 | 2017-09-06 | 船井電機株式会社 | Display device |
| CN203478001U (en) * | 2013-06-27 | 2014-03-12 | 南京中电熊猫液晶显示科技有限公司 | Direct type LED (light emitting diode) backlight module |
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- 2018-08-14 CN CN201810920100.4A patent/CN108957859B/en active Active
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| CN108957859A (en) | 2018-12-07 |
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