CN109581743A - A kind of slim high-new dynamic back lighting device - Google Patents
A kind of slim high-new dynamic back lighting device Download PDFInfo
- Publication number
- CN109581743A CN109581743A CN201811585389.5A CN201811585389A CN109581743A CN 109581743 A CN109581743 A CN 109581743A CN 201811585389 A CN201811585389 A CN 201811585389A CN 109581743 A CN109581743 A CN 109581743A
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- China
- Prior art keywords
- led
- lighting device
- back lighting
- diffusing sheet
- light diffusing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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 kind of slim high-new dynamic back lighting devices, including display panel, backlight diffuser plate and backlight mechanical cover, bottom reflection piece, each LED and LED drive circuit are equipped in the cavity of the display panel, backlight diffuser plate and backlight mechanical cover composition, each LED in the cavity is additionally provided with even light diffusing sheet, the even light diffusing sheet is arranged in the bottom surface of the backlight diffuser plate, and the even light diffusing sheet is equipped with ascending or by dredging close cavernous structure.The marginal position light mixing state consistency for using the technical solution LED being intersected, Product Status transition consistency is more preferable, can effectively reduce the quantity of LED light mixing needs, reduces overall cost.
Description
Technical field
The present invention relates to field of display screen, in particular to a kind of slim high-new dynamic back lighting device.
Background technique
With the development of technology, show that appearance and performance requirement are higher and higher, corresponding dynamic backlight technology (abbreviation Local
Dimming it) applies and gives birth to, Local Dimming refers to that the display content according to panel, dynamic adjust the corresponding region backlight LED
Brightness reduce the technology of display screen power consumption to increase display screen contrast.
Since Local dimming can adjust liquid crystal panel backlight brightness in real time, driving correspondence in cooperation display screen end is excellent
Change, increase and display contrast, actually have greatly expanded the grey-scale range that display screen is shown so that image quality show it is more readily apparent,
Panel dark-state light leakage is inhibited to a certain extent simultaneously, enhances the potential stimulation to human eye under driving at night environment indirectly.
Since dynamic backlight generally needs straight-down negative to design, as shown in Figure 1, TFT liquid crystal display panel 11, diffusion barrier 12, backlight machine
Tool shell 13, reflectance coating 14, LED projection hot spot 15, diffusion barrier support 16, LED expand minus lens 17, LED18, LED drive circuit
Plate 19, LED light mixing need space, and thickness control difficulty is higher, can be with compressed thickness using lens, but taste can be brought to decline,
Assemble the problems such as more demanding.Common dynamic backlight is difficult to do on thickness thin.
Since LED projection hot spot is circle, as shown in Figures 2 and 3, in hot spot intersection location, opposite luminance transition is had
Difference watches dynamic menu, and since LED delivery position luminance transition is inconsistent, display compensation can not be accomplished to cope with, it can be seen that dodge
The problems such as bright phenomenon and clear obscure boundary.
Summary of the invention
In view of the above problems, the embodiment of the present invention is designed to provide a kind of slim high-new dynamic back lighting device.
The slim high-new dynamic back lighting device of one kind provided in an embodiment of the present invention, including display panel, backlight diffuser plate
And backlight mechanical cover, it is anti-that bottom is equipped in the cavity of the display panel, backlight diffuser plate and backlight mechanical cover composition
Piece, each LED and LED drive circuit are penetrated, each LED in the cavity is additionally provided with even light diffusing sheet, and the even light diffusing sheet is set
It sets in the bottom surface of the backlight diffuser plate, the even light diffusing sheet is equipped with ascending or by dredging close cavernous structure.
Optionally, increase side reflecting plate in each LED surrounding to separate each LED.
Optionally, it is designed between the side reflecting plate and bottom reflection piece for right-angle side or angular rim, for matching
Different light mixing thickness and optimization reflection efficiency.
Optionally, the light mixing thickness is in 2mm or less.
Optionally, the bottom reflection piece, side reflecting plate and the even light diffusing sheet use full spectrum high reflectance material
Material.
Optionally, the bottom reflection piece, side reflecting plate and the even light diffusing sheet use visible spectrum reflectivity
Material greater than 90%.
Optionally, by single led composition optics module, then by each LED light module group assembling at back lighting device.
Therefore using the present embodiment technical solution, due to the even light diffusing sheet by collocation LED and LED phase is prevented
The side reflection board structure of mutual crosstalk, so that the marginal position light mixing state consistency of LED intersection, Product Status transition consistency is more
It is good, the quantity of LED light mixing needs can be effectively reduced, overall cost is reduced.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is backing structure schematic diagram in the prior art；
Fig. 2 is that back lighting device projects hot spot schematic diagram in Fig. 1；
Fig. 3 is to show signal curve in Fig. 2；
Fig. 4 is the slim high-new dynamic back lighting device structural schematic diagram of one kind provided by the invention；
Fig. 5 is a kind of even light diffusing sheet structural schematic diagram provided by the invention；
Fig. 6 is a kind of cavernous structure spot projection schematic diagram provided by the invention；
Fig. 7 is another side reflection board structure schematic diagram provided by the invention；
Fig. 8 is single led optics module perspective view of the explosion provided by the invention；
Fig. 9 is single led optics module overall schematic provided by the invention；
Figure 10 is the back lighting device schematic diagram of LED light mould group composition in Fig. 9.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment:
The present embodiment provides a kind of slim high-new dynamic back lighting devices, as shown in figure 4, including display panel 21, backlight
Diffuser plate 22 and backlight mechanical cover 23, in the display panel 21, backlight diffuser plate 22 and backlight mechanical cover 23 composition
Bottom reflection piece 26, each LED24 and LED drive circuit 25 are equipped in cavity, each LED24 in the cavity is additionally provided with even light
The bottom surface of the backlight diffuser plate 22 is arranged in diffuser plate 27, the even light diffusing sheet 27, and the even light diffusing sheet 27 is equipped with
It is ascending or by dredging close cavernous structure, as shown in Figure 5.It can be, but not limited to, centered on LED24, in material table
Face by LED center to periphery, do it is ascending, or by dredging close cavernous structure.LED24 light source projects light 29, passes through
Small cavernous structure transmits backlight, is reflected in aporate locations of structures by the even light diffusing sheet 27 of highly reflective material
To backlight bottom reflection piece 26, light is broken up again to be returned from different perspectives again, finally all exports to liquid by cavernous structure
The work for finally homogenizing light may be implemented by the size and arranging density that control cavernous structure different location in LCD panel 21
With.It is equal to a small LED light source since micro- cavernous structure can be considered, can be reduced into LED in the design many micro-
Small spot projection, after mixing, due to hot spot very little, as shown in fig. 6, whole projection light spot shape levels off to square.
It can be, but not limited to, increase side reflecting plate 28 in each LED24 surrounding and separate each LED24.The side reflection
It is designed between plate 28 and bottom reflection piece 26 for right-angle side or angular rim, as shown in fig. 7, for matching different light mixing thickness
And optimization reflection efficiency, the light mixing thickness can be controlled in 2mm or less.Structure design can reduce the mutual crosstalk of LED, and
Play the supporting role to even 27 structure of light diffusing sheet.
The side reflecting plate can do different angle design, match different light mixing thickness, to optimize reflection efficiency, side
Portion's reflecting plate can effectively adjust LED by the angle and reflective condition of reflection light, finally by adjusting for other angles
Optimize the reflection efficiency of entire display system.
The bottom reflection piece 26, side reflecting plate 28 and the even light diffusing sheet 27 use full spectrum high reflectance material
Material, can be addition TiO2, and the plastic material of BaSO4 is also possible to the material that other visible spectrum reflectivity are greater than 90%.
As seen in figs. 8-10, by single led composition optics module, then each LED light module group assembling filled at backlight
It sets, back lighting device design and assembly in this mode can be standardized more preferably, while reducing product cost.
To sum up, by the even light diffusing sheet for the LED that arranges in pairs or groups and the side reflection board structure of the mutual crosstalk of LED is prevented, so that LED
The marginal position light mixing state consistency of intersection, Product Status transition consistency is more preferable, can effectively reduce the number of LED light mixing needs
Amount reduces overall cost.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (7)
1. a kind of slim high-new dynamic back lighting device, including display panel, backlight diffuser plate and backlight mechanical cover, described
Bottom reflection piece, each LED and LED driving electricity are equipped in the cavity of display panel, backlight diffuser plate and backlight mechanical cover composition
Road, which is characterized in that each LED in the cavity is additionally provided with even light diffusing sheet, and the even light diffusing sheet is arranged in the back
The bottom surface of light diffusing sheet, the even light diffusing sheet are equipped with ascending or by dredging close cavernous structure.
2. a kind of slim high-new dynamic back lighting device as described in claim 1, which is characterized in that increase in each LED surrounding
Side reflecting plate separates each LED.
3. slim high-new dynamic back lighting device as claimed in claim 2 a kind of, which is characterized in that the side reflecting plate with
It is designed between bottom reflection piece for right-angle side or angular rim, for matching different light mixing thickness and optimization reflection efficiency.
4. a kind of slim high-new dynamic back lighting device as claimed in claim 3, which is characterized in that the light mixing thickness exists
2mm or less.
5. a kind of slim high-new dynamic back lighting device as claimed in claim 4, which is characterized in that the bottom reflection piece,
Side reflecting plate and the even light diffusing sheet use full spectrum highly reflective material.
6. a kind of slim high-new dynamic back lighting device as claimed in claim 4, which is characterized in that the bottom reflection piece,
Side reflecting plate and the even light diffusing sheet are greater than 90% material using visible spectrum reflectivity.
7. such as the slim high-new dynamic back lighting device of one kind described in claim 5 or 6, which is characterized in that by single led composition
Optics module, then by each LED light module group assembling at back lighting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811585389.5A CN109581743A (en) | 2018-12-24 | 2018-12-24 | A kind of slim high-new dynamic back lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811585389.5A CN109581743A (en) | 2018-12-24 | 2018-12-24 | A kind of slim high-new dynamic back lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109581743A true CN109581743A (en) | 2019-04-05 |
Family
ID=65931544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811585389.5A Pending CN109581743A (en) | 2018-12-24 | 2018-12-24 | A kind of slim high-new dynamic back lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109581743A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220413192A1 (en) * | 2021-06-28 | 2022-12-29 | Funai Electric Co., Ltd. | Display device and backlight device |
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| US20040213000A1 (en) * | 2003-04-25 | 2004-10-28 | Toppoly Optoelectronics | Improved Back Light Module |
| JP2005340750A (en) * | 2004-05-28 | 2005-12-08 | Samsung Electro-Mechanics Co Ltd | Led package and liquid crystal display back light assembly provided therein |
| CN201434951Y (en) * | 2009-07-13 | 2010-03-31 | 京东方科技集团股份有限公司 | Light guide plate, backlight module and liquid crystal display (LCD) |
| CN201555153U (en) * | 2009-12-01 | 2010-08-18 | 深圳帝光电子有限公司 | Uniform high-brightness side-light type backlight source |
| CN201739899U (en) * | 2010-02-23 | 2011-02-09 | 金芃 | Direct type thin LED backlight module |
| CN201851960U (en) * | 2010-02-26 | 2011-06-01 | 金芃 | Thin type straightly-downward LED (light-emitting diode) backlight module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220413192A1 (en) * | 2021-06-28 | 2022-12-29 | Funai Electric Co., Ltd. | Display device and backlight device |
| US11774646B2 (en) * | 2021-06-28 | 2023-10-03 | Funai Electric Co., Ltd. | Display device and backlight device |
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190405 |
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| RJ01 | Rejection of invention patent application after publication |