CN109358453A - A kind of backlight module and display panel - Google Patents
A kind of backlight module and display panel Download PDFInfo
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- CN109358453A CN109358453A CN201811532528.8A CN201811532528A CN109358453A CN 109358453 A CN109358453 A CN 109358453A CN 201811532528 A CN201811532528 A CN 201811532528A CN 109358453 A CN109358453 A CN 109358453A
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- Prior art keywords
- backlight module
- light emitting
- extinction
- substrate
- film layer
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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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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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)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
This application discloses a kind of backlight module and display panels, wherein, the backlight module includes and the one-to-one extinction mould group of light emitting structure, and the absorbing ability of the extinction film layer successively decreases around from preset, improve backlight module from the geometric center of light emitting structure display brightness successively decreases around the phenomenon that, realize promoted backlight module display brightness homogeneity, solve the problems, such as the display brightness of backlight module is inhomogenous and caused by " babysbreath ".
Description
Technical field
This application involves field of display technology, more specifically to a kind of backlight module and display panel.
Background technique
Backlight module is the important composition part of passive luminescence display mould group (such as liquid crystal display die set), for providing light
Source assists passive light-emitting component to be shown.
As shown in FIG. 1, FIG. 1 is the cross section structure schematic diagram of traditional backlight module, traditional backlight module is for being emitted
White light, the white light that backlight module 10 is emitted are forming colourama outgoing after the colored color blocking 21 on opposite substrate.But it is this
Backlight module is due to needing that colored color blocking 21 is cooperated to use, and the colored thicknesses of layers under the limitation of prior art level of color blocking 21
It is limited in 2.5mm hereinafter, causing the colour gamut of display module and colorimetric parameter all poor.
In order to solve this problem, as shown in Fig. 2, Fig. 2 is the cross section structure of another backlight module in the prior art
Schematic diagram, the light-emitting component 12 that array arrangement is directly arranged on the substrate 11 realize the straight-down negative Mini-LED backlight of glory outgoing
Mould group is applied and is given birth to, and also shows black matrix" 23 and color film substrate 22 in Fig. 1 and Fig. 2, wherein black matrix" 23 is for avoiding
The light colour mixture being emitted between adjacent light-emitting units.This backlight module can be combined with backlight area regulation technology (Local
Dimming displaying contrast for display panel) is promoted.But the brightness uniformity of backlight module shown in Fig. 2 is poor, with reference to Fig. 3,
Fig. 3 is the display effect schematic diagram of backlight module, be easy to appear it is as shown in Figure 3, as display brightness it is different and caused by it is " full
TianXing " phenomenon.
Summary of the invention
In order to solve the above technical problems, this application provides a kind of backlight module and display panel, to realize promotion backlight
The homogeneity of the display brightness of mould group, solve the problems, such as the display brightness of backlight module is inhomogenous and caused by " babysbreath ".
To realize the above-mentioned technical purpose, the embodiment of the present application provides following technical solution:
A kind of backlight module, comprising:
Substrate:
Multiple light emitting structures of array arrangement on the substrate；
Diffusion structure on light emitting structure light direction, the diffusion structure have opposite first surface and second
Surface；
Positioned at the first surface or/and second surface of the diffusion structure, with the one-to-one extinction of the light emitting structure
Film layer；
The extinction film layer is used to absorb the light of light emitting structure outgoing, and the absorbing ability of the extinction film layer from
Preset is successively decreased around, and the geometric center on the orthographic projection of the preset over the substrate and the light emitting structure surface exists
Orthographic projection on the substrate is overlapped.
A kind of display panel, comprising:
The array substrate and color membrane substrates being oppositely arranged；
Deviate from the backlight module of the color membrane substrates side positioned at the array substrate, the backlight module is above-mentioned one
The backlight module.
It can be seen from the above technical proposal that the embodiment of the present application provides a kind of backlight module and display panel, wherein
The backlight module include with the one-to-one extinction mould group of light emitting structure, and the absorbing ability of the extinction film layer is from preset
Successively decrease around, improve backlight module from the geometric center of light emitting structure display brightness successively decreases around the phenomenon that, realize
The homogeneity for promoting the display brightness of backlight module, solve as the display brightness of backlight module is inhomogenous and caused by it is " full
TianXing " problem.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, 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
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of the schematic diagram of the section structure of backlight module in the prior art；
Fig. 2 is the schematic diagram of the section structure of another backlight module in the prior art；
Fig. 3 be as the display brightness of backlight module it is inhomogenous and caused by " babysbreath " realistic problem；
Fig. 4 is a kind of overlooking structure diagram for backlight module that one embodiment of the application provides；
Fig. 5 is the schematic diagram of the section structure in Fig. 4 along AA ' line；
Fig. 6 is a kind of the schematic diagram of the section structure for backlight module that another embodiment of the application provides；
Fig. 7 is a kind of the schematic diagram of the section structure for backlight module that another embodiment of the application provides；
Fig. 8 is a kind of the schematic diagram of the section structure for backlight module that the further embodiment of the application provides；
Fig. 9 is a kind of overlooking structure diagram for extinction film layer that one embodiment of the application provides；
Figure 10 is a kind of overlooking structure diagram for extinction film layer that another embodiment of the application provides；
Figure 11 is the schematic diagram of the section structure of BB ' line along Figure 10 that one embodiment of the application provides；
Figure 12 is a kind of the schematic diagram of the section structure for display panel that one embodiment of the application provides；
Figure 13 is a kind of overlooking structure diagram for array substrate that one embodiment of the application provides.
Specific embodiment
As described in background, the display brightness homogeneity of straight-down negative Mini-LED backlight module in the prior art compared with
Difference this is because in this backlight module, is limited to the limitation of binding technique still referring to Figure 2, between light-emitting component 12
Distance (Pitch) generally can not be less than a certain limit value, this allows for the region between adjacent light-emitting component 12 since distance is sent out
The distance of optical element 12 farther out, and causes the display brightness in the region lower than the display brightness of 12 middle section of light-emitting component, this
" babysbreath " phenomenon shown in Fig. 3 is resulted in.
In view of this, the embodiment of the present application provides a kind of backlight module, the backlight module includes and light emitting structure one
One corresponding extinction mould group, and the absorbing ability of the extinction film layer successively decreases around from preset, improve backlight module from
The geometric center of light emitting structure the phenomenon that display brightness successively decreases around, realize the uniform of the display brightness for promoting backlight module
Property, solve the problems, such as the display brightness of backlight module is inhomogenous and caused by " babysbreath ".
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
The embodiment of the present application provides a kind of backlight module, and with reference to Fig. 4 and Fig. 5, Fig. 4 is the vertical view knot of the backlight module
Structure schematic diagram, Fig. 5 are the schematic diagram of the section structure in Fig. 4 along AA ' line, and the backlight module includes:
Substrate 100；
Multiple light emitting structures 101 of array arrangement on the substrate 100；
Diffusion structure 200 on 101 light direction of light emitting structure, the diffusion structure 200 have opposite
First surface 201 and second surface 202；
Positioned at the first surface 201 and/or second surface 202 of the diffusion structure 200, with the light emitting structure 101 1
One corresponding extinction film layer 300；
The light that the extinction film layer 300 is emitted for absorbing the light emitting structure 101, and the extinction film layer 300
Absorbing ability successively decreases around from preset, orthographic projection of the preset on the substrate 100 and the light emitting structure 101
Orthographic projection of the geometric center on surface on the substrate 100 is overlapped.
In some embodiments of the present application, the substrate 100 can be flexible circuit board (Flexible Printed
Circuit, FPC), it can also be resin substrate (Bismaleimide Triazine, BT).The light emitting structure 101 can be
Light emitting diode (Light Emitting Diode, LED) chip, the light-emitting diode chip for backlight unit can by the technique of binding with
The substrate 100 is fixed；In other embodiments of the application, the light emitting structure 101 can also be organic light-emitting diodes
It manages (Organic Light Emitting Diode, OLED), which may be whole chip, then
It is arranged on substrate 100 by binding technique；In addition, Organic Light Emitting Diode can also be by the techniques such as being deposited, patterning
The structure being formed directly on substrate 100, the application is to this and without limitation.
It should be noted that in structure shown in Fig. 5, the first surface 201 is towards the light emitting structure 101, institute
Second surface 202 is stated away from the light emitting structure 101, and the extinction film layer 300 is located on the first surface 201.But
In the other embodiments of the application, with reference to Fig. 6 and Fig. 7, Fig. 6 and Fig. 7 are the schematic diagram of the section structure of the backlight module, are being schemed
In structure shown in 6, the extinction film layer 300 is located on the second surface 202.In the structure shown in figure 7, described first
The extinction film layer 300 is provided on surface 201 and second surface 202.
In some embodiments of the present application, the light emitting structure 101 can directly issue different colour reference light, institute
Stating colour reference light can be red light, green light and blue light；In the other embodiment of the application, as shown in figure 8,
Fig. 8 is the schematic diagram of the section structure in Fig. 4 along AA ' line, the backlight module further include:
Cover the phosphor film layer 102 of the light emitting structure 101.
In the embodiment shown in fig. 8, the light emitting structure 101 is served only for ejecting white light, and then white light passes through different face
The outgoing of colour reference light is formed after the phosphor film layer 102 of color.The phosphor film layer 102, which can be, is formed in hair by spraying process
On photo structure 101, it can also be and be formed in by way of membrane pressure on light emitting structure 101.The phosphor film layer 102 can be with
It is phosphor powder layer.
In addition, it is necessary to explanation, the extinction film layer 300 refers to extinction film with the light emitting structure 101 one-to-one correspondence
At least there is partly overlapping part in layer 300 and orthographic projection of the corresponding light emitting structure 101 on substrate 100, so that institute
Stating extinction film layer 300 can have the function of absorbing the light that the light emitting structure 101 is emitted.
For example, in Fig. 5-backlight module shown in Fig. 7, orthographic projection of the extinction film layer 300 on the substrate 100
Positioned at the light emitting structure 101 in the orthographic projection on the substrate 100, i.e., the surface area of the described extinction film layer 300 is less than institute
State the surface area of light emitting structure 101, and the geometric center of the geometric center of the extinction film layer 300 and the light emitting structure 101
It is overlapped；In the backlight module of this structure, since the setting area of extinction film layer 300 is smaller, improvement backlight module is being played
On the basis of display brightness homogeneity, reduce the degree of absorption for the light being emitted to light emitting structure 101 to a certain extent, is promoted
Light utilization.
In the configuration shown in fig. 8, orthographic projection of the extinction film layer 300 on the substrate 100 and the light-emitting junction
Orthographic projection of the structure 101 on the substrate 100 is overlapped, i.e., surface area and the light emitting structure 101 of the described extinction film layer 300
Surface area is identical, and the geometric center of the extinction film layer 300 is overlapped with the geometric center of the light emitting structure 101.This
In the backlight module of structure, since extinction film layer 300 is consistent with the surface area of light emitting structure 101, it is only necessary to whole to consider to shine
The degree of successively decreasing of display brightness of the structure 101 from geometric center around can design the absorbing ability of extinction film layer 300 from pre-
It sets up an office to the degree of successively decreasing of surrounding, advantageously reduces the design difficulty of extinction film layer 300.
The feasible composition structure of extinction film layer 300 is illustrated below, is provided with reference to Fig. 9, Fig. 9 for the embodiment of the present application
A kind of extinction film layer 300 overlooking structure diagram, in the configuration shown in fig. 9, the extinction film layer 300 include multiple battle arrays
Arrange the extinction unit 301 of arrangement.
It in the present embodiment, can be by adjusting the extinction unit 301 in the extinction film layer 300 at different location
Parameter reduce extinction film layer 300 to realize purpose that the absorbing ability of extinction film layer 300 successively decreases around from preset
Design difficulty.
With reference to Figure 10, Figure 10 is the overlooking structure diagram of the extinction film layer 300, in structure shown in Fig. 10, institute
The surface shape of extinction unit 301 is stated as circle, and the diameter of the extinction unit 301 is successively passed around by the preset
Subtract.With the reduction of 301 diameter of extinction unit, the absorbing ability of extinction unit 301 is also decreased, and is located at preset to realize
Extinction unit 301 absorbing ability it is stronger, and be located at the purpose that gradually decreases of absorbing ability of the extinction unit 301 of surrounding.
The specific embodiment of the application provides a kind of decreasing fashion of the diameter of extinction unit 301, in this implementation
In example, the diameter of the extinction unit 301 is successively decreased by the first preset step-length around by the preset；
The value range of first preset step-length is 1 μm -10 μm.
The value of first preset step-length for example can be 1 μm, 2 μm, 3 μm, 5 μm or 10 μm etc., and different first is pre-
If the value of step-length can satisfy the requirement of various sizes of backlight module.
With reference to Figure 11, Figure 11 is described in the structure shown in Figure 11 for the schematic diagram of the section structure in Figure 10 along BB ' line
The height of extinction unit 301 is successively successively decreased around by the preset.
In the present embodiment, the height of the extinction unit 301 refers to the top surface of extinction unit 301 apart from the substrate
The thicknesses of layers of the distance on 100 surfaces namely the extinction unit 301.Therefore, the value of the height of the extinction unit 301
Extinction unit 301 directly proportional to the absorbing ability of the extinction unit 301, thicker, absorbing ability is also stronger.Therefore,
The height of the extinction unit 301 equally may be implemented by the mode that the preset is successively successively decreased around positioned at preset
The absorbing ability of extinction unit 301 is stronger, and the purpose that the absorbing ability for being located at the extinction unit 301 of surrounding gradually decreases.
In addition, in the present embodiment, the surface shape of the extinction unit 301 can be the geometric forms such as round or rectangular
Shape can equally set the diameter of extinction unit 301 to by institute when the surface shape of the extinction unit 301 is round
It states preset successively to successively decrease around, the absorbing ability of extinction film layer 300 is set as passing around from preset by common realize
The purpose subtracted.
On the basis of the above embodiments, in another embodiment of the application, the extinction unit 301 can be oil
Ink structure.
The ink structure can be formed by printing ink using the technique of silk-screen printing, and mature preparation process is conducive to
Reduce the formation difficulty of the extinction unit 301.
When the extinction unit 301 be ink structure when, can using by the height of ink structure from preset around
The mode successively successively decreased realizes the purpose that the absorbing ability of extinction film layer 300 is successively decreased around by preset, and can also use will
The diameter of ink structure realizes the absorbing ability of extinction film layer 300 by preset around by the mode that preset is successively decreased around
The purpose successively decreased；Further, it is also possible to simultaneously using above two mode realize the absorbing ability of extinction film layer 300 from preset to
The purpose that surrounding is successively decreased.The application to this and without limitation, specifically depending on actual conditions.
In the alternative embodiment of the application, color transparent degree after the color of change ink structure can also be passed through
Mode realizes the purpose that the absorbing ability of extinction film layer 300 is successively decreased around by preset.Such as it can be the ink structure
Color white is faded to by black around from the preset.It is also possible to the color transparent degree of the ink structure from institute
Preset is stated around from 0% to 100% gradual change etc..The application to this and without limitation, specifically depending on actual conditions.
Correspondingly, the embodiment of the present application also provides a kind of display panels, as shown in figure 12, Figure 12 is the display panel
The schematic diagram of the section structure, the display panel includes:
The array substrate B100 and color membrane substrates being oppositely arranged；
Deviate from the backlight module C100 of the color membrane substrates side, the backlight module positioned at the array substrate B100
C100 is backlight module described in any of the above-described embodiment.
The color membrane substrates include colour film substrate A203 and the black matrix" A202 being set in colour film substrate and Transparent color
Hinder A201.
Referring still to Figure 12, since the outgoing of the reference light of three kinds of different colours may be implemented in the backlight module,
The color membrane substrates only need to limit the Exit positions of the reference light of corresponding color.
In order to be illustrated to each device architecture on array substrate B100, with reference to Figure 13, Figure 13 is the array base
The overlooking structure diagram of plate B100, the array substrate B100 include:
Array substrate B104；
Data line B101 and grid line B102 arranged in a crossed manner and mutually insulated on the array substrate B104, and
Display pixel B103 in the data line B101 and grid line B102 limited area；
Thin film transistor (TFT) (the Thin Film being electrically connected with the data line B101 and the grid line B102
Transistor, TFT), the grid G of the thin film transistor (TFT) is electrically connected with the grid line B102, source S and the data line
B101 electrical connection, the drain electrode S of the thin film transistor (TFT) are electrically connected with pixel electrode；
With the grid data line B101 data drive circuit being electrically connected and be electrically connected with the grid line B102
Pole driving circuit.
Gate driving mode in figure 13 illustrates is unilateral driving method, described in the other embodiments of the application
The gate driving mode of array substrate can in a manner of cross-drive or bilateral driving etc., the application to this and without limitation, tool
Depending on stereoscopic actual conditions.
In conclusion the embodiment of the present application provides a kind of backlight module and display panel, wherein the backlight module packet
Include with the one-to-one extinction mould group of light emitting structure, and the absorbing ability of the extinction film layer successively decreases around from preset, changes
Be apt to backlight module from the geometric center of light emitting structure display brightness successively decreases around the phenomenon that, realize and promote backlight module
The homogeneity of display brightness, solve the problems, such as the display brightness of backlight module is inhomogenous and caused by " babysbreath ".
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (12)
1. a kind of backlight module characterized by comprising
Substrate:
Multiple light emitting structures of array arrangement on the substrate；
Diffusion structure on light emitting structure light direction, the diffusion structure have opposite first surface and the second table
Face；
Positioned at the first surface or/and second surface of the diffusion structure, with the one-to-one extinction film layer of the light emitting structure；
The extinction film layer is used to absorb the light of light emitting structure outgoing, and the absorbing ability of the extinction film layer is from default
Point successively decreases around, and the geometric center on the orthographic projection of the preset over the substrate and the light emitting structure surface is described
Orthographic projection on substrate is overlapped.
2. backlight module according to claim 1, which is characterized in that the extinction film layer includes the suction of multiple array arrangements
Light unit.
3. backlight module according to claim 2, which is characterized in that the diameter of the extinction unit from the preset to
Surrounding is successively successively decreased.
4. backlight module according to claim 3, which is characterized in that the diameter of the extinction unit from the preset to
Surrounding is successively decreased by the first preset step-length；
The value range of first preset step-length is 1 μm -10 μm.
5. backlight module according to claim 2, which is characterized in that the height of the extinction unit from the preset to
Surrounding is successively successively decreased.
6. backlight module according to claim 2, which is characterized in that the extinction unit is ink structure.
7. backlight module according to claim 6, which is characterized in that the color of the ink structure from the preset to
Surrounding fades to white by black.
8. backlight module according to claim 6, which is characterized in that the color transparent degree of the ink structure is from described pre-
It sets up an office around from 0% to 100% gradual change.
9. backlight module according to claim 1, which is characterized in that the orthographic projection of the extinction film layer over the substrate
Orthographic projection weight in the orthographic projection of the light emitting structure over the substrate or with the light emitting structure over the substrate
It closes.
10. backlight module according to claim 1, which is characterized in that further include:
Cover the phosphor film layer of the light emitting structure.
11. backlight module according to claim 1, which is characterized in that the diffusion structure is diffusion sheet.
12. a kind of display panel characterized by comprising
The array substrate and color membrane substrates being oppositely arranged；
Deviate from the backlight module of the color membrane substrates side positioned at the array substrate, the backlight module is claim 1-11
Described in any item backlight modules.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811532528.8A CN109358453A (en) | 2018-12-14 | 2018-12-14 | A kind of backlight module and display panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811532528.8A CN109358453A (en) | 2018-12-14 | 2018-12-14 | A kind of backlight module and display panel |
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| CN109358453A true CN109358453A (en) | 2019-02-19 |
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| CN201811532528.8A Pending CN109358453A (en) | 2018-12-14 | 2018-12-14 | A kind of backlight module and display panel |
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Application publication date: 20190219 |