CN109557721A - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
- Publication number
- CN109557721A CN109557721A CN201811569725.7A CN201811569725A CN109557721A CN 109557721 A CN109557721 A CN 109557721A CN 201811569725 A CN201811569725 A CN 201811569725A CN 109557721 A CN109557721 A CN 109557721A
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- Prior art keywords
- backlight module
- led
- area
- subregion
- brightness
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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
Abstract
The invention discloses a kind of backlight module and display device, backlight module includes: backboard, and backboard includes substrate and the side frame that connect with substrate, and substrate and side frame form an accommodating space；Multiple LED and reflecting layer in accommodating space are set；Multiple LED are located at substrate towards the side of backlight module light-emitting surface, and multiple LED are arranged in arrays；Reflecting layer is located at substrate towards the side of backlight module light-emitting surface, the light-emitting surface of the reflecting surface in reflecting layer towards backlight module.Backlight module includes output optical zone and non-output optical zone, non- output optical zone surrounds output optical zone, output optical zone includes first area and second area, first area surrounds second area, first area includes multiple LED, second area includes multiple LED, and the reflectivity positioned at the reflecting layer of first area is greater than the reflectivity positioned at the reflecting layer of second area.A kind of display device includes above-mentioned backlight module.The problem of backlight module provided by the invention and display device can be effectively improved backlight module brightness disproportionation.
Description
Technical field
The present invention relates to field of display technology, it is specifically related to a kind of backlight module and display device.
Background technique
Backlight module has important application in field of display technology, light emitting diode (Light Emitting
Diode, LED) because of light source of the advantages that high-luminous-efficiency, low-power consumption, colour gamut be wide, longer service life as backlight module
Also it has a very wide range of applications.
Currently, backlight module in the market can probably be divided into direct-type backlight and two kinds of side entrance back.Side entering type back
Light is the side that LED is arranged in light guide plate, converts area source for linear light source by light guide plate, passes through a series of optical film
Piece is by the light uniformization of area source.The LED of direct-type backlight is arranged in arrays and the underface of display panel is arranged in straight
It connects to form area source, but the light-emitting surface appearance that direct-type backlight will lead to backlight module due to the array arrangement mode of LED is bright
Spend uneven phenomenon.
Summary of the invention
In view of this, the present invention provides a kind of backlight module and display device, to improve direct-type backlight brightness disproportionation
The phenomenon that.
A kind of backlight module, comprising:
Backboard, the backboard include substrate and the side frame that connect with substrate, and the substrate and the side frame form an accommodating
Space；
Multiple LED and reflecting layer in the accommodating space are set；
The multiple LED is located at substrate towards the side of the backlight module light-emitting surface, and the multiple LED is arranged in matrix
Column；
The reflecting layer is located at the substrate towards the side of backlight module light-emitting surface, the reflecting surface direction in the reflecting layer
The light-emitting surface of the backlight module；
The backlight module includes output optical zone and non-output optical zone, and the non-output optical zone surrounds the output optical zone, the light out
Area includes first area and second area, and the first area surrounds the second area, and the first area includes multiple institutes
LED is stated, the second area includes multiple LED, and the reflectivity positioned at the reflecting layer of the first area is greater than position
Reflectivity in the reflecting layer of the second area.
A kind of display device, including backlight module as described above.
Backlight module provided by the invention and display device, at least realize following the utility model has the advantages that
There is showing for brightness disproportionation due to the light-emitting surface that the array arrangement mode of LED will lead to backlight module in direct-type backlight
As.The present invention is by the reflectivity in the reflecting layer of direct-type backlight neighboring area being arranged more anti-than the reflecting layer of intermediate region
The problem of it is big to penetrate rate, backlight module luminance nonuniformity can be effectively improved, it is particularly possible to improve backlight module periphery turn blue or week
The problem of side is shaded.
Detailed description of the invention
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in describing below to embodiment makees letter
Singly introduce, it should be apparent that, drawings in the following description are only some embodiments of the invention, summary of the invention of the invention
It is not limited to embodiment represented by following attached drawing, for those of ordinary skill in the art, is not paying creative labor
Under the premise of dynamic, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of top view of backlight module of the embodiment of the present invention；
Fig. 2 is a kind of sectional view of the Fig. 1 along B-B；
Fig. 3 is the top view of another backlight module of the embodiment of the present invention；
Fig. 4 is the top view of another backlight module of the embodiment of the present invention；
Fig. 5 is the top view of another backlight module of the embodiment of the present invention；
Fig. 6 is a kind of top view of backlight module of the embodiment of the present invention；
Fig. 7 is the top view of another backlight module of the embodiment of the present invention；
Fig. 8 is a kind of top view of display device of the embodiment of the present invention；
Fig. 9 is a kind of sectional view of the Fig. 8 along C-C.
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 embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, therefore the present invention is not by under
The limitation of specific embodiment disclosed in face.
It is more and more widely used in the backlight of field of display technology, straight-down negative, process of the inventor in research
Middle discovery, since direct-type backlight is by the way that using LED as light source, multiple LED are arranged in arrays, and display panel is arranged in
Underface directly obtains area source, but just because of the matrix arrangement of LED, the amount of light meeting of backlight module neighboring area
Less than the amount of light of backlight module intermediate region, it so then will lead to the luminance nonuniformity phenomenon of backlight module, can specifically show
The phenomenon that turning blue or shade for periphery.General backlight module obtains white light, this feelings using blue-ray LED corresponding fluorescent powder of arranging in pairs or groups
It will appear the phenomenon that backlight module periphery is turned blue under condition.It will appear backlight module if backlight module directly uses white light LEDs
The phenomenon that periphery is shaded.Do not make specifically it should be noted that the application does light source using what kind of LED for backlight module
It limits.
It is turned blue in view of this, the present invention provides a kind of backlight modules with to improve the periphery of direct-type backlight or that shades asks
Topic.
Fig. 1 is a kind of top view of backlight module of the embodiment of the present invention, and Fig. 2 is a kind of sectional view of the Fig. 1 along B-B, such as
Shown in Fig. 1 and Fig. 2, a kind of backlight module 100, comprising:
Backboard, backboard include substrate 130 and the side frame connecting with substrate 130 140, and substrate 130 and side frame 140, which form one, to be held
150 between emptying；
Multiple LED110 in accommodating space 150 and reflecting layer 120 are set；
Multiple LED110 are located at substrate 130 towards the side of 100 light-emitting surface of backlight module, and multiple LED110 are arranged in matrix
Column；
Reflecting layer 120 is located at substrate 130 towards the side of 100 light-emitting surface of backlight module, the reflecting surface direction in reflecting layer 120
The light-emitting surface of backlight module 100；
Backlight module 100 includes output optical zone A2 and non-output optical zone A1, and non-output optical zone A1 surrounds output optical zone A2, output optical zone A2 packet
First area A21 and second area A22 are included, first area A21 surrounds second area A22, and first area A21 includes multiple
LED110, second area A22 include multiple LED110, and the reflectivity positioned at the reflecting layer of first area A21 121, which is greater than, is located at the
The reflectivity in the reflecting layer 122 of two region A22.
It should be noted that drive circuit layer (being not shown in Fig. 2) can be set in the side of substrate 130 towards LED110,
LED110 arranged in arrays can be piece in drive circuit layer, and LED110 is electrically connected with drive circuit layer, reflecting layer 120
It can be set in the side of the separate substrate 130 of drive circuit layer.Drive circuit layer can be printed circuit board (Printed
Circuit Board, PCB), be also possible to include the thin film transistor (TFT) of multiple array arrangements drive substrate, the present invention for
Fixed form and driving method, the composed structure of drive circuit layer of LED is not especially limited.
It should be noted that the effect in reflecting layer 120 is to increase the utilization rate for the light that LED110 is issued, specifically, as schemed
The light that LED110 shown in 2 is issued passes through the index path that reflecting layer 120 is reflected, and what LED110 was issued herein is emitted directly toward backlight
The light of the light-emitting surface of mould group 100 is not shown in figure, and the portion of part LED110 sending is only illustratively shown in Fig. 2
The light-emitting surface of light splitter directive backlight module 100 after reflecting layer 120 is reflected.All LED shown in the drawings of the application
Quantity and arrange it is only schematical, the present invention arranges for the quantity of LED, the quantity of different zones LED and LED array
Concrete mode is all not construed as limiting.
Backlight module provided in this embodiment is divided by the way that the output optical zone of backlight module is carried out subregion positioned at backlight mould
The first area of neighboring area and the second area positioned at backlight module intermediate region are organized, the anti-of the reflecting layer of first area is set
Reflectivity of the rate greater than the reflecting layer of second area is penetrated, backlight module neighboring area i.e. first area are so just increased
The utilization rate that LED emits beam can improve backlight module since the amount of light of neighboring area is less than the amount of light of intermediate region
Caused by backlight module brightness disproportionation the problem of, specifically improve backlight module periphery turn blue or periphery obfuscation ask
Topic.
Optionally, Fig. 3 is the top view of another backlight module of the embodiment of the present invention, in conjunction with shown in Fig. 2 and Fig. 3, the
One region A21 includes third subregion A213 and the 4th subregion A214, and output optical zone A2 includes first edge S1 interconnected
It is different with the extending direction of second edge S2, first edge S1 and second edge S2, third subregion A213 simultaneously with the first side
Edge S1 and second edge S2 connect, and the 4th subregion A214 only connects with one of both in first edge S1 and second edge S2,
Third subregion A213 and the 4th subregion A214 includes multiple LED110.
The extending direction of extending direction and second edge S2 respectively along first edge S1, third subregion A213,
Four subregion A214 and third subregion A213 are arranged successively, and the reflectivity positioned at the reflecting layer 120 of third subregion A213 is big
Reflectivity in the reflecting layer 120 positioned at the 4th subregion A214, and positioned at the anti-of the reflecting layer 120 of the 4th subregion A214
It penetrates rate and is greater than the reflectivity positioned at the reflecting layer 120 of second area A22.
It should be noted that Fig. 4 is the top view of another backlight module of the embodiment of the present invention, as shown in figure 4, with figure
Unlike 3 embodiments, the boundary of third subregion A213 is extended out on the direction towards the 4th subregion A214, i.e.,
The shape of third subregion A213 is " ┏ " shape or " ┓ " shape or " ┗ " shape or " ┛ " shape, but the embodiment of the present invention is for the
The location and shape on the boundary of three subregions and the 4th subregion are not construed as limiting, for the boundary of first area and second area
Location and shape are equally also not construed as limiting, and can be adjusted as the case may be.
Backlight module provided by the present embodiment, since the amount of light of the neighboring area of backlight module is less than intermediate region
Amount of light and lead to backlight module brightness disproportionation, especially show as periphery turn blue or periphery obfuscation, further, backlight mould
The amount of light of group corner can be less than the amount of light in other regions, so by by the region on backlight module periphery namely the
One region is further divided into third subregion and the 4th subregion in detail, and third subregion refers to the corner region of backlight module
Domain, the reflectivity in the reflecting layer of setting third subregion are greater than the reflectivity in the reflecting layer of the 4th subregion, further refine
Improve backlight module corner than other regions the phenomenon that more turning blue or shade, so that backlight module brightness is more evenly.
Optionally, Fig. 5 is the top view of another backlight module for the embodiment of the present invention, as shown in figure 5, first area
A21 includes third subregion A213, the 4th subregion A214 and the 5th subregion A215, respectively along the extension of first edge S1
The extending direction in direction and second edge S2, third subregion A213, the 4th subregion A214, the 5th subregion A215, the 4th
Subregion A214 and third subregion A213 are arranged successively, third subregion A213, the 4th subregion A214 and the 5th subregion
A215 includes multiple LED.Herein, the reflectivity in the reflecting layer of third subregion A213 is greater than the reflection of the 4th subregion A214
The reflectivity of layer, the reflectivity in the reflecting layer of the reflectivity greater than the 5th subregion A215 in the reflecting layer of the 4th subregion A214,
The reflectivity in reflecting layer of the reflectivity in the reflecting layer of the 5th subregion A215 greater than second area A22.
Explanation is also needed, the embodiment of the present invention is for the quantity of the child partition of first area and the position of child partition
Arrangement mode is not construed as limiting, and the location and shape on the boundary between each subregion of output optical zone are not construed as limiting, and view is specific
Depending on situation.
Backlight module provided in this embodiment increases the child partition number of backlight module first area, for improving backlight
The phenomenon that mould group goes out light unevenness has carried out more fine adjusting.
Optionally, as shown in Fig. 2, reflecting layer 120 is provided with vacancy section 123, orthographic projection position of the LED110 in substrate 130
In vacancy section 123 in the orthographic projection in substrate 130.
It should be noted that drive circuit layer (being not shown in Fig. 2) can be set in the side of substrate 130 towards LED110,
LED110 arranged in arrays can be piece in drive circuit layer, and LED110 is electrically connected with drive circuit layer, reflecting layer 120
It can be set in the side of the separate substrate 130 of drive circuit layer.Drive circuit layer can be printed circuit board (Printed
Circuit Board, PCB), be also possible to include the thin film transistor (TFT) of multiple array arrangements drive substrate, the present invention for
Fixed form and driving method, the composed structure of drive circuit layer of LED is not especially limited.So reflecting layer 120 needs
The design of corresponding hollow out evacuation is done at the position LED110.
Backlight module provided in this embodiment is conducive to drive in LED110 and substrate 130 in reflecting layer setting vacancy section
The connection and driving of circuit.
Optionally, the material in reflecting layer 120 is ink.When the material in reflecting layer 120 is ink, the setting side in reflecting layer
Formula can be the mode of coating, by ink be coated in substrate 130 towards backlight module light-emitting surface side.It should be noted that
The present invention is not construed as limiting the set-up mode in reflecting layer.
Specifically, as shown in Figure 1, the ink of different reflectivity, position is respectively set in first area A21 and second area A22
It is greater than the reflectivity of the ink positioned at second area A22 in the reflectivity of the ink of first area A21.
Further, backlight module 100 as shown in Figure 3, the reflectivity positioned at the ink of third subregion A213 are greater than
Positioned at the reflectivity of the ink of the 4th subregion A214, the reflectivity of the ink of the 4th subregion A214 is greater than second area A22
Ink reflectivity.
Backlight module provided in this embodiment, the material in reflecting layer use ink, and setting is located at the ink of first area A21
Reflectivity be greater than positioned at second area A22 ink reflectivity, setting positioned at third subregion A213 ink reflection
Rate is greater than the reflectivity of the ink positioned at the 4th subregion A214, can improve backlight module since the amount of light of neighboring area is small
Caused by the amount of light of intermediate region backlight module periphery turn blue or periphery shade the problem of.Ink can use simultaneously
The mode of coating coats in the accommodating space of backlight module, and simple process is simultaneously easy to accomplish.
Optionally, the material in reflecting layer 120 is reflector plate.When the material in reflecting layer 120 is reflector plate, reflecting layer is set
The mode of setting can be the mode pasted, by reflector plate be covered in substrate 130 towards backlight module light-emitting surface side.It needs
Bright is that the present invention is not construed as limiting the set-up mode in reflecting layer.
Specifically, as shown in Figure 1, the reflector plate of different reflectivity is respectively set in first area A21 and second area A22,
It is greater than the reflectivity of the reflector plate positioned at second area A22 positioned at the reflectivity of the reflector plate of first area A21.
Further, backlight module as shown in Figure 3, the reflectivity positioned at the reflector plate of third subregion A213 are greater than position
It is greater than second area in the reflectivity of the reflectivity of the reflector plate of the 4th subregion A214, the reflector plate of the 4th subregion A214
The reflectivity of the reflector plate of A22.
The material of backlight module provided in this embodiment, reflecting layer uses reflector plate, positioned at the reflector plate of first area A21
Reflectivity be greater than positioned at second area A22 reflector plate reflectivity, positioned at the reflection of the reflector plate of third subregion A213
Rate is greater than the reflectivity of the reflector plate positioned at the 4th subregion A214, can improve backlight module due to the amount of light of neighboring area
Turn blue less than backlight module periphery caused by the amount of light of intermediate region or periphery shade the problem of.Reflector plate can be with simultaneously
It is covered in by the way of pasting in the accommodating space of backlight module, simple process is simultaneously easy to accomplish.
It should be noted that the present invention is not especially limited the material in reflecting layer 120, as long as reflection can be played
The material of effect can be applied on backlight module provided by the invention.
Optionally, as depicted in figs. 1 and 2, the reflectivity positioned at the reflecting layer of first area A21, which is greater than, is located at second area
The brightness of LED of the brightness greater than second area A22 of the LED110 of first area A21 is arranged in the reflectivity in the reflecting layer of A22.
Further, it is desirable to realize that the brightness of the LED110 of first area A21 is bright greater than the LED110 of second area A22
Degree can be greater than the electricity of the LED110 by second area A22 by being arranged by the electric current of the LED110 of first area A21
Stream.
Specifically, the backlight module of the present embodiment can also include that control module and driving circuit (do not show in Fig. 1 herein
Out), control module and driving circuit control and driving LED shine, and the LED in the same region can be by series or in parallel
Mode interconnects, or is connected with each other by connecting with multiple combinations mode in parallel, and the present invention is not especially limited herein.
Control module can be used for controlling electric current of the different zones by LED, and the electric current to realize the LED by first area A21 is big
In the electric current of the LED by second area A22, control module and driving circuit herein is also not especially limited, and is herein
Illustratively illustrate the present embodiment, realizes that different zones are also not especially limited by the different mode of LED current.
Backlight module provided in this embodiment is greater than second area A22 by the way that the brightness of LED of first area A21 is arranged
LED brightness, and setting is greater than the electric current of the LED by second area A22 by the electric current of the LED of first area A21,
On the basis of the reflectivity in the reflecting layer positioned at first area A21 is greater than positioned at the reflectivity in the reflecting layer of second area A22,
Can further improve backlight module due to neighboring area amount of light be less than intermediate region amount of light caused by backlight
The problem of mould group periphery is turned blue or periphery is shaded.
Optionally, as shown in Figures 2 and 3, the reflectivity in the reflecting layer positioned at third subregion A213, which is greater than, is located at the
On the basis of the reflectivity in the reflecting layer of four subregion A214, the brightness that the LED110 of first area A21 is arranged is greater than the secondth area
The brightness of the LED110 of domain A22.First area A21 includes third subregion A213 and the 4th subregion A214, setting third
The brightness of LED110 of the brightness of the LED110 of region A213 greater than the 4th subregion A214.
Further, it is desirable to realize the brightness of LED of the brightness greater than second area A22 of the LED110 of first area A21,
The brightness of LED110 of the brightness of the LED110 of third subregion A213 greater than the 4th subregion A214 can be passed through by setting
The electric current of the LED110 of first area A21 is greater than the electric current of the LED110 by second area A22, and setting passes through third subregion
The electric current of the LED110 of A213 is greater than the electric current of the LED110 by the 4th subregion A214.
Specifically, the backlight module of the present embodiment can also include that control module and driving circuit (do not show in Fig. 3 herein
Out), control module and driving circuit control and driving LED shine, and the LED in the same region can be by series or in parallel
Mode interconnects, or is connected with each other by connecting with multiple combinations mode in parallel, and the present invention is not especially limited herein.
Control module can be used for controlling electric current of the different zones by LED, and control module and driving circuit herein is not made specifically yet
It limits, is only exemplary herein and illustrates the present embodiment, realize that different zones are not made specifically by the different mode of LED current yet
It limits.
Backlight module provided in this embodiment, can be by backlight module to the size control of the electric current by LED
Setting control module and driving circuit, control module control the electric current of the LED of different backlight areas by driving circuit, so that logical
The electric current for crossing the LED110 of first area A21 is greater than the electric current of the LED110 by second area A22, passes through third subregion
The electric current of the LED110 of A213 is greater than the electric current of the LED110 by the 4th subregion A214, to realize first area A21's
The brightness of LED110 of the brightness of LED110 greater than second area A22, the brightness of the LED110 of third subregion A213 are greater than the
The brightness of the LED110 of four subregion A214.But the present embodiment by the control mode of LED current for being not especially limited
Specifically depend on the circumstances.
Backlight module provided in this embodiment, the difference of the LED luminance by the way that different backlight areas are arranged, specifically, back
The LED luminance on optical mode group periphery is greater than the brightness of the LED of backlight intermediate region, backlight module neighboring area is carried out more smart
Thin region division, the luminance difference alienation design of each region LED, Lai Gaishan backlight module are small due to the amount of light of neighboring area
Caused by the amount of light of intermediate region backlight module periphery turn blue or periphery shade the problem of.
Optionally, as depicted in figs. 1 and 2, multiple LED110 have at least two brightness gears.
Specifically, Fig. 6 is a kind of top view of backlight module of the embodiment of the present invention, the LED110 in Fig. 6 is not shown, and is tied
It closes shown in Fig. 1 and Fig. 6, the reflectivity in the reflecting layer positioned at first area A21 is greater than positioned at the reflecting layer of second area A22
Reflectivity, the reflectivity positioned at the reflecting layer of third subregion A213 are greater than the reflection positioned at the reflecting layer of the 4th subregion A214
On the basis of rate, the brightness gear that the LED110 of second area A22 is arranged is Y, the brightness gear of the LED110 of first area A21
It is the positive integer more than or equal to 1 for Y+N, N, setting is identical by the electric current of each LED110, and brightness gear Y+N is corresponding
The brightness of LED110 is greater than the brightness of the corresponding LED110 of brightness gear Y.
Backlight module provided in this embodiment, on the basis of the reflecting layer of different zones setting different reflectivity, in addition
The LED of different brightness gears is introduced, setting is identical by the electric current of each LED, positioned at the brightness shelves of the LED on backlight module periphery
The brightness of position is greater than the brightness of the brightness gear of the LED positioned at backlight module intermediate region, further improves backlight module
Due to neighboring area amount of light be less than intermediate region amount of light caused by backlight module periphery turn blue or periphery obfuscation
The problem of.
Optionally, Fig. 7 is the top view of another backlight module of the embodiment of the present invention, and the LED110 in Fig. 7 is not shown,
In conjunction with shown in Fig. 3 and Fig. 7, setting is identical by the electric current of each LED110, and the LED110's of setting setting second area A22 is bright
Degree gear is Y, and the brightness gear of the LED110 of third subregion A213 is Y+2, the brightness of the LED110 of the 4th subregion A214
Gear is Y+1, and the brightness of the corresponding LED110 of brightness gear Y+2 is greater than the brightness of the corresponding LED110 of brightness gear Y+1, brightness
The brightness of the corresponding LED110 of gear Y+1 is greater than the brightness of the corresponding LED110 of brightness gear Y.
It should be noted that the present invention is not construed as limiting about the number of partitions of backlight module and the quantity of LED luminance gear,
Specifically depend on the circumstances.
The subregion that backlight module provided in this embodiment is more refined, while the LED of multiple brightness gears is introduced, if
Set it is identical by the electric current of each LED, positioned at the LED on backlight module periphery brightness gear brightness be greater than be located at backlight module
The brightness of the brightness gear of the LED of intermediate region, the brightness positioned at the brightness gear of the LED in backlight module corner are greater than backlight mould
The brightness of the brightness gear of the LED of neighboring area of the group between corner, finer and smoother improves backlight module due to periphery
The problem of light quantity in region is turned blue less than backlight module periphery caused by the light quantity of intermediate region or periphery is shaded.
The present invention also provides a kind of display device, Fig. 8 is a kind of top view of display device of the embodiment of the present invention, this
Display device 200 includes any one as described above backlight module 100.
Specifically, Fig. 9 is a kind of sectional view of the Fig. 8 along C-C, as shown in figure 9, backlight module 100 further includes optical film layer
160, optical film layer 160 is located at side of the LED110 far from substrate 130, and optical film layer 160 herein may include diffusion sheet, increase
Bright film and phosphor film layer, the present invention are not construed as limiting optical film layer 160, specifically depend on the circumstances.Display device 200 includes back
Optical mode group 100, display panel 210 and cover board 220, display panel 210 are located at the light emission side of backlight module 100, and cover board 220 is located at
Side of the display panel 210 far from backlight module 100.Display panel 210 herein can be liquid crystal display panel, be also possible to
Other need the display panel of backlight module, liquid crystal display panel generally include the opposite array substrate designed, color membrane substrates and
Liquid crystal layer between the two, the present invention are not especially limited display panel.Drawings and examples of the invention are for display
The specific structure and composition of device are also not construed as limiting, and are specifically depended on the circumstances.
This display device can be the electronics that mobile phone, tablet computer, laptop, display etc. have display function and set
Standby, this display device has its correlated characteristic and correspondingly technical effect, and details are not described herein again.
It is more and more widely used in the backlight of field of display technology, straight-down negative, process of the inventor in research
Middle discovery, since direct-type backlight is by the way that using LED as light source, multiple LED are arranged in arrays, and display panel is arranged in
Underface directly obtains area source, but just because of the matrix arrangement of LED, the amount of light meeting of backlight module neighboring area
Less than the amount of light of backlight module intermediate region, it so then will lead to the luminance nonuniformity phenomenon of backlight module, can specifically show
The phenomenon that turning blue or shade for periphery.General backlight module obtains white light, this feelings using blue-ray LED corresponding fluorescent powder of arranging in pairs or groups
It will appear the phenomenon that backlight module periphery is turned blue under condition.It will appear backlight module if backlight module directly uses white light LEDs
The phenomenon that periphery is shaded.
In view of this, the present invention provides a kind of backlight module and display device, to improve the periphery hair of direct-type backlight
The problem of blue or obfuscation.By the way that the output optical zone of backlight module is carried out subregion, it is divided into positioned at backlight module neighboring area and is located at
Multiple subregions of backlight module intermediate region, the reflectivity that the reflecting layer of backlight module neighboring area is arranged are greater than in backlight module
Between region reflecting layer reflectivity, so just increase the utilization rate that the LED of backlight module neighboring area emits beam, can be with
Improve backlight module due to neighboring area amount of light be less than intermediate region amount of light caused by backlight module brightness disproportionation
The problem of, can specifically improve backlight module periphery turn blue or periphery shade the problem of.
Claims (13)
1. a kind of backlight module, which is characterized in that the backlight module includes:
Backboard, the backboard include substrate and the side frame that connect with substrate, and the substrate and the side frame form an accommodating space；
Multiple LED and reflecting layer in the accommodating space are set；
The multiple LED is located at the substrate towards the side of the backlight module light-emitting surface, and the multiple LED is arranged in matrix
Column；
The reflecting layer is located at the substrate towards the side of the backlight module light-emitting surface, the reflecting surface direction in the reflecting layer
The light-emitting surface of the backlight module；
The backlight module includes output optical zone and non-output optical zone, and the non-output optical zone surrounds the output optical zone, the output optical zone packet
First area and second area are included, the first area surrounds the second area, and the first area includes multiple described
LED, the second area include multiple LED, and the reflectivity positioned at the reflecting layer of the first area, which is greater than, to be located at
The reflectivity in the reflecting layer of the second area.
2. backlight module according to claim 1, which is characterized in that the first area includes third subregion and the 4th
Subregion, the output optical zone include first edge and second edge interconnected, the first edge and the second edge
Extending direction it is different, the third subregion connects with the first edge and the second edge simultaneously, and the described 4th is sub
Region only connects with one of both in the first edge and the second edge；
The extending direction of extending direction and the second edge respectively along the first edge, the third subregion, institute
It states the 4th subregion and the third subregion is arranged successively, the reflectivity positioned at the reflecting layer of the third subregion is big
Reflectivity in the reflecting layer for being located at the 4th subregion.
3. backlight module according to claim 1, which is characterized in that the reflecting layer is provided with vacancy section, and the LED exists
Orthographic projection in the substrate is located in the orthographic projection of the vacancy section on the substrate.
4. backlight module according to claim 1, which is characterized in that the material in the reflecting layer is ink.
5. backlight module according to claim 1, which is characterized in that the material in the reflecting layer is reflector plate.
6. backlight module according to claim 1, which is characterized in that the brightness of the LED of the first area is greater than
The brightness of the LED of the second area.
7. backlight module according to claim 6, which is characterized in that pass through the electric current of the LED of the first area
Greater than the electric current of the LED by the second area.
8. backlight module according to claim 2, which is characterized in that the brightness of the LED of the third subregion is big
In the brightness of the LED of the 4th subregion.
9. backlight module according to claim 8, which is characterized in that pass through the electricity of the LED of the third subregion
Stream is greater than the electric current of the LED by the 4th subregion.
10. backlight module according to claim 2, which is characterized in that the multiple LED has at least two brightness shelves
Position.
11. backlight module according to claim 10, which is characterized in that the LED's of the second area is described bright
Degree gear is Y, and the brightness gear of the LED of the first area is Y+N, and the N is the positive integer more than or equal to 1,
Electric current by each LED is identical, and the brightness of the corresponding LED of the brightness gear Y+N is greater than the brightness gear Y
The brightness of the corresponding LED.
12. backlight module according to claim 11, which is characterized in that the LED's of the third subregion is described
Brightness gear is Y+2, and the brightness gear of the LED of the 4th subregion is Y+1, and the brightness gear Y+2 is corresponding
The LED brightness be greater than the corresponding LED of the brightness gear Y+1 brightness.
13. a kind of display device, which is characterized in that the display device includes backlight described in claim 1-12 any one
Mould group.
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| CN201811569725.7A CN109557721B (en) | 2018-12-21 | 2018-12-21 | Backlight module and display device |
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| CN201811569725.7A CN109557721B (en) | 2018-12-21 | 2018-12-21 | Backlight module and display device |
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| CN109557721A true CN109557721A (en) | 2019-04-02 |
| CN109557721B CN109557721B (en) | 2022-01-07 |
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| WO2023005609A1 (en) * | 2021-07-30 | 2023-02-02 | 京东方科技集团股份有限公司 | Array substrate, manufacturing method therefor, light-emitting device, and tiled display device |
| US11703716B2 (en) | 2020-04-28 | 2023-07-18 | Hisense Visual Technology Co., Ltd. | Display apparatus |
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| US11822183B2 (en) | 2020-03-25 | 2023-11-21 | Hisense Visual Technology Co., Ltd. | Display apparatus |
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