CN109507822A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN109507822A CN109507822A CN201910033238.7A CN201910033238A CN109507822A CN 109507822 A CN109507822 A CN 109507822A CN 201910033238 A CN201910033238 A CN 201910033238A CN 109507822 A CN109507822 A CN 109507822A
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- Prior art keywords
- plate
- light guide
- backlight module
- guide plate
- light source
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Classifications
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to the light guide
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133314—Back frames
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a kind of backlight module and liquid crystal display device.Backlight module of the invention includes backboard, light guide plate, first light source and diffusion sheet, the backboard includes bottom plate and the side plate for being connected to bottom edge, the light guide plate be fixed on the inner sidewall of side plate and with bottom plate interval, the first light source is between bottom plate and light guide plate, the diffusion sheet is set to above bottom plate and light guide plate and contacts with light guide plate, to which the light that first light source issues can be conducted through the light guide plate to the edge of diffusion sheet, backlight module of the invention is enabled to eliminate the shadow at liquid crystal display device edge when should be in liquid crystal display device, promote the display quality of liquid crystal display device.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of backlight modules and liquid crystal display device.
Background technique
With the development of display technology, the planes such as liquid crystal display (Liquid Crystal Display, LCD) display dress
It sets because having many advantages, such as that high image quality, power saving, fuselage is thin and has a wide range of application, and is widely used in mobile phone, TV, a number
The various consumer electrical products such as word assistant, digital camera, laptop, desktop computer, become the master in display device
Stream.
Liquid crystal display device on existing market is largely backlight liquid crystal display device comprising liquid crystal display panel and back
Optical mode group (backlight module).The working principle of liquid crystal display panel is to place liquid crystal in the parallel glass substrate of two panels
Molecule, there are many tiny electric wires vertically and horizontally for two panels glass substrate centre, change whether by being powered to control liquid crystal molecule
It changes direction, the light refraction of backlight module is come out and generates picture.
Since liquid crystal display panel itself does not shine, need the light source provided by backlight module normally to show image, therefore,
Backlight module becomes one of the key component of liquid crystal display device.Backlight module is divided into side according to the difference of light source incidence position and enters
Formula backlight module with two kinds of down straight aphototropism mode set.Down straight aphototropism mode set is by backlight such as cathodouminescence fluorescent tube (Cold
Cathode Fluorescent Lamp, CCFL) or the setting of light emitting diode (Light Emitting Diode, LED) light source
At liquid crystal display panel rear, light forms area source after diffusion sheet homogenizes and is supplied to liquid crystal display panel.
Referring to Fig. 1, being a kind of existing structural schematic diagram of down straight aphototropism mode set, which includes
Backboard 100, center 200, light source 300, reflector plate 400 and diffusion sheet 500, the backboard 100 is including bottom plate 110 and is connected to bottom plate
110 edges and first side plate 120 vertical with bottom plate 110, the center 200 include the support plate of the second side plate 210, frame-shaped
220 and third side plate 230, the second side plate 210 is located at 120 outside of the first side plate, support plate 220 be located on the first side plate 210 and
Its outer edge is connect with the inner sidewall of the second side plate 210, and support plate 220 is vertical with the second side plate 120, and third side plate 230 connects
In support plate 220 inward flange and to close to bottom plate 110 direction extend, between third side plate 230 and the second side plate 210 away from
It is gradually increased from along the direction close to bottom plate 110.Reflector plate 400 is set on bottom plate 110 and is located at bottom plate 110 and third side plate
230 between the edge of bottom plate 230, and reflector plate 400 has opening 410, and light source 300 is set on bottom plate 110 and corresponding reflection
The opening 410 of piece 400 is arranged, and the upper and support plate 220 that diffusion sheet 500 is set to light source 300, reflector plate 400 and support plate 220 connects
Touching.Existing center 200 be required to it is reflective, therefore material be typically chosen opaque white polycarbonate (PC) addition glass
Fiber (GF) is made, therefore less in the light that the position that diffusion sheet 500 is contacted with the support plate 220 of center 200 can reach,
Shadow is caused in this region, so that dark frame or dark side occurs in the liquid crystal display device surrounding with the backlight module, influences product
Quality.
Summary of the invention
The purpose of the present invention is to provide a kind of backlight modules, can eliminate the shadow at edge, are applied to liquid crystal display and fill
The display quality of liquid crystal display device is able to ascend in setting.
Another object of the present invention is to provide a kind of liquid crystal display devices, can eliminate the shadow at edge, display quality
It is high.
To achieve the above object, the present invention provides a kind of backlight module, including backboard, light guide plate, first light source and diffusion
Piece；
The backboard includes bottom plate and the side plate for being connected to bottom edge；The light guide plate is fixed on the inner sidewall of side plate
And with bottom plate interval；The first light source is between bottom plate and light guide plate；The diffusion sheet is set to above bottom plate and light guide plate
And it is contacted with light guide plate.
The side plate is vertical with bottom plate.
The light guide plate is fixed on the inner sidewall of side plate by way of being detachably connected.
The side plate is equipped with threaded hole, and the light guide plate is equipped with through-hole corresponding with threaded hole, and the light guide plate is by wearing
It crosses through-hole and is fixed on the inner sidewall of side plate with the screw of threaded hole cooperation.
The backlight module further includes the first reflector plate being arranged between light guide plate and side plate.
The first light source is lamp bar.
The backlight module further includes the support plate on the outside of side plate, and the support plate is protruded from far from the edge of bottom plate
The upper surface of diffusion sheet.
The backlight module further includes optical diaphragm group, the optical diaphragm group be located above diffusion sheet and support plate and with
Support plate contact.
The backlight module further includes the second light source being arranged on bottom plate and the second reflector plate；The second light source and
Two reflector plates are respectively positioned on side of the light guide plate far from side plate；The diffusion sheet is located above second light source and the second reflector plate；Institute
It states the second reflector plate and is equipped with opening, the setting of second light source corresponding opening.
The present invention also provides a kind of liquid crystal display devices, including above-mentioned backlight module.
Beneficial effects of the present invention: backlight module of the invention includes backboard, light guide plate, first light source and diffusion sheet, institute
Stating backboard includes bottom plate and the side plate for being connected to bottom edge, and the light guide plate is fixed on the inner sidewall of side plate and between bottom plate
Every the first light source is between bottom plate and light guide plate, and the diffusion sheet is set to above bottom plate and light guide plate and and light guide plate
Contact, so that the light that first light source issues can conduct through the light guide plate to the edge of diffusion sheet, so that backlight mould of the invention
Group can eliminate the shadow at liquid crystal display device edge when should be in liquid crystal display device, promote the display product of liquid crystal display device
Matter.
Detailed description of the invention
For further understanding of the features and technical contents of the present invention, it please refers to below in connection with of the invention detailed
Illustrate and attached drawing, however, the drawings only provide reference and explanation, is not intended to limit the present invention.
In attached drawing,
Fig. 1 is a kind of existing structural schematic diagram of down straight aphototropism mode set；
Fig. 2 is the structural schematic diagram of backlight module of the invention；
Fig. 3 is the structural schematic diagram of liquid crystal display device of the invention.
Specific embodiment
Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention
Example and its attached drawing are described in detail.
Referring to Fig. 2, the present invention provides a kind of backlight module, including backboard 10, light guide plate (Light Guide Plate,
LGP) 20, first light source 30 and diffusion sheet 40.The backboard 10 includes bottom plate 11 and the side plate 12 for being connected to 11 edge of bottom plate.Institute
Light guide plate 20 is stated to be fixed on the inner sidewall of side plate 12 and be spaced with bottom plate 11.The first light source 30 be installed on backboard 10 and
Between bottom plate 11 and light guide plate 20.The diffusion sheet 40 is set to bottom plate 11 and 20 top of light guide plate and connects with light guide plate 20
Touching namely light guide plate 20 are supported diffusion sheet 40.
Specifically, referring to Fig. 2, the side plate 12 is vertical with bottom plate 11, the light guide plate 20 is parallel with side plate 12.
Specifically, the light guide plate 20 is fixed on the inner sidewall of side plate 12 by way of being detachably connected.
Further, referring to Fig. 2, in a preferred embodiment of the invention, the side plate 12 is equipped with threaded hole 121, institute
Light guide plate 20 is stated equipped with through-hole 21 corresponding with threaded hole 121, the light guide plate 20 by pass through through-hole 21 and with threaded hole 121
The screw 22 of cooperation is fixed on the inner sidewall of side plate 12.
Specifically, referring to Fig. 2, the backlight module further include be arranged between light guide plate 20 and side plate 12 it is first anti-
Penetrate piece 50.
Preferably, first reflector plate 50 is adhered on the inner sidewall of side plate 12.
Further, referring to Fig. 2, corresponding in a preferred embodiment of the invention, on first reflector plate 50 guide-lighting
The through-hole 21 of plate 20 is equipped with notch 51, and screw 22 cooperates after passing through through-hole 21 and notch 51 with threaded hole 121.
Specifically, the first light source 30 is lamp bar.Preferably LED light bar.
Specifically, referring to Fig. 2, the backlight module further includes the support plate 60 set on 12 outside of side plate, the support
Plate 60 protrudes from the upper surface of diffusion sheet 40 far from the edge of bottom plate 11.
Further, the support plate 60 is parallel with side plate 12.
Specifically, referring to Fig. 2, the backlight module further includes optical diaphragm group 70, the optical diaphragm group 70 is located at
It contacts above diffusion sheet 40 and support plate 60 and with support plate 60 namely support plate 60 is supported optical diaphragm group 70.
Specifically, referring to Fig. 2, the backlight module further includes that the second light source 80 being arranged on bottom plate 11 and second are anti-
Penetrate piece 90.The second light source 80 and the second reflector plate 90 are respectively positioned on side of the light guide plate 20 far from side plate 12.The diffusion sheet
40 are located at 90 top of second light source 80 and the second reflector plate.Second reflector plate 90 is equipped with opening 91, and second light source 80 is corresponding
91 setting of opening.The second light source 80 is mounted on backboard 10.
Further, the second light source 80 is also lamp bar, preferably LED light bar.
It should be noted that backlight module of the invention is on the inside of the side plate 12 of backboard 10 by fixing a light guide plate 20,
The bottom plate 11 of the light guide plate 20 and backboard 10 separately, first light source 30 is mounted on backboard 10 and be located at bottom plate 11 with
Between light guide plate 20, so that the backlight module is at work, the light that first light source 30 issues injects light guide plate 20, light guide plate 20
It can be middle compared with the prior art to make light using reflective center support diffusion sheet by light conduction to the edge of diffusion sheet 40
There is shadow, backlight of the invention in backlight module edge caused by the position that center is contacted with diffusion sheet can not be diffused into
Mould group goes out that light is more uniform, eliminates the shadow of edge appearance, therefore by backlight module and liquid crystal of the invention
Show that panel carries out collocation and formed after liquid crystal display device, the display of the liquid crystal display device is uniform, and edge is not in
Dark frame or dark side have better display quality, and then utilize multiple liquid crystal display devices with backlight module of the invention
When carrying out being spliced to form tiled display equipment, since the edge of each liquid crystal display device is without dark frame or dark side, spell
Connecing display equipment integrally has better picture quality.
Referring to Fig. 3, based on the same inventive concept, the present invention also provides a kind of liquid crystal display devices, including above-mentioned back
Optical mode group no longer carries out repeated description to the structure of backlight module herein.The liquid crystal display device further includes LCD display
Plate 2 and front frame 3, liquid crystal display panel 2 are arranged on optical diaphragm 70, and the outside of support plate 60 is arranged in front frame 3, by liquid crystal
Show that panel 2 is fixed together with backlight film group.
It should be noted that the backlight module of liquid crystal display device of the invention passes through on the inside of the side plate 12 of backboard 10 admittedly
First light source 30 separately, is mounted on backboard 10 and is made by the bottom plate 11 of a fixed light guide plate 20, the light guide plate 20 and backboard 10
It is between bottom plate 11 and light guide plate 20, and when so that liquid crystal display device working, the light injection that first light source 30 issues is led
Tabula rasa 20, light guide plate 20 can be middle compared with the prior art to utilize reflective center branch by light conduction to the edge of diffusion sheet 40
Backlight module edge occurs caused by support diffusion sheet makes light that can not be diffused into the position that center is contacted with diffusion sheet
Shadow, in the present invention backlight module be the light that provides of liquid crystal display panel 30 more evenly, backlight module edge will not go out
Existing shadow, uniform light is emitted after injecting liquid crystal display panel 2, so that the display of the liquid crystal display device is uniform, surrounding
Edge is not in dark frame or dark side, has a better display quality, so using multiple liquid crystal display devices of the invention into
When row is spliced to form tiled display equipment, since the edge of each liquid crystal display device is without dark frame or dark side, splicing
Display equipment integrally has better picture quality.
In conclusion backlight module of the invention includes backboard, light guide plate, first light source and diffusion sheet, the backboard packet
Include bottom plate and be connected to the side plate of bottom edge, the light guide plate be fixed on the inner sidewall of side plate and with bottom plate interval, it is described
Between bottom plate and light guide plate, the diffusion sheet is set to above bottom plate and light guide plate and contacts with light guide plate first light source, from
And the light that first light source issues can be conducted through the light guide plate to the edge of diffusion sheet, so that backlight module of the invention should be in liquid
The shadow that liquid crystal display device edge can be eliminated when in crystal device, promotes the display quality of liquid crystal display device.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology
Other various corresponding changes and modifications are made in design, and all these change and modification all should belong to the claims in the present invention
Protection scope.
Claims (10)
1. a kind of backlight module, which is characterized in that including backboard (10), light guide plate (20), first light source (30) and diffusion sheet
(40)；
The backboard (10) includes bottom plate (11) and the side plate (12) for being connected to bottom plate (11) edge；The light guide plate (20) is fixed
It is spaced on the inner sidewall of side plate (12) and with bottom plate (11)；The first light source (30) is located at bottom plate (11) and light guide plate (20)
Between；The diffusion sheet (40) is set to above bottom plate (11) and light guide plate (20) and contacts with light guide plate (20).
2. backlight module as described in claim 1, which is characterized in that the side plate (12) is vertical with bottom plate (11).
3. backlight module as described in claim 1, which is characterized in that the light guide plate (20) is by way of being detachably connected
It is fixed on the inner sidewall of side plate (12).
4. backlight module as claimed in claim 3, which is characterized in that the side plate (12) is equipped with threaded hole (121), described to lead
Tabula rasa (20) is equipped with through-hole (21) corresponding with threaded hole (121), and the light guide plate (20) is by passing through through-hole (21) and and spiral shell
The screw (22) of pit (121) cooperation is fixed on the inner sidewall of side plate (12).
5. backlight module as described in claim 1, which is characterized in that further include setting light guide plate (20) and side plate (12) it
Between the first reflector plate (50).
6. backlight module as described in claim 1, which is characterized in that the first light source (30) is lamp bar.
7. backlight module as described in claim 1, which is characterized in that further include the support plate on the outside of side plate (12)
(60), the support plate (60) protrudes from the upper surface of diffusion sheet (40) far from the edge of bottom plate (11).
8. backlight module as claimed in claim 7, which is characterized in that further include optical diaphragm group (70), the optical diaphragm
Group (70) is located above diffusion sheet (40) and support plate (60) and contacts with support plate (60).
9. backlight module as described in claim 1, which is characterized in that further include the second light source being arranged on bottom plate (11)
(80) and the second reflector plate (90)；The second light source (80) and the second reflector plate (90) are respectively positioned on light guide plate (20) far from side plate
(12) side；The diffusion sheet (40) is located above second light source (80) and the second reflector plate (90)；Second reflector plate
(90) opening (91), second light source (80) corresponding opening (91) setting are equipped with.
10. a kind of liquid crystal display device, which is characterized in that including such as described in any item backlight modules of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910033238.7A CN109507822A (en) | 2019-01-14 | 2019-01-14 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910033238.7A CN109507822A (en) | 2019-01-14 | 2019-01-14 | Backlight module and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109507822A true CN109507822A (en) | 2019-03-22 |
Family
ID=65757874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910033238.7A Pending CN109507822A (en) | 2019-01-14 | 2019-01-14 | Backlight module and liquid crystal display device |
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| CN (1) | CN109507822A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111880336A (en) * | 2020-07-31 | 2020-11-03 | 深圳创维－Rgb电子有限公司 | Backlight assembly and liquid crystal display module |
| CN112068353A (en) * | 2020-09-09 | 2020-12-11 | 深圳创维－Rgb电子有限公司 | Liquid crystal display module and liquid crystal splicing screen |
| CN112255836A (en) * | 2020-11-03 | 2021-01-22 | 重庆翰博光电有限公司 | Side light leakage backlight module suitable for super narrow frame solution |
| CN114815389A (en) * | 2022-05-09 | 2022-07-29 | Tcl华星光电技术有限公司 | Backlight module and mobile terminal |
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Application publication date: 20190322 |