CN116577951A - Backlight module and display device - Google Patents

Backlight module and display device Download PDF

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Publication number
CN116577951A
CN116577951A CN202310440064.2A CN202310440064A CN116577951A CN 116577951 A CN116577951 A CN 116577951A CN 202310440064 A CN202310440064 A CN 202310440064A CN 116577951 A CN116577951 A CN 116577951A
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CN
China
Prior art keywords
led lamp
beads
color led
color
light
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.)
Pending
Application number
CN202310440064.2A
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Chinese (zh)
Inventor
朱海丽
张攀
邹艳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Tianma Microelectronics Co Ltd
Original Assignee
Wuhan Tianma Microelectronics Co Ltd
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Filing date
Publication date
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Priority to CN202310440064.2A priority Critical patent/CN116577951A/en
Publication of CN116577951A publication Critical patent/CN116577951A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
    • 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
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The application provides a backlight module and a display device, wherein the backlight module comprises: the light source assembly comprises a central area and an edge area surrounding the central area, wherein the edge area is provided with at least one LED lamp row, each LED lamp row comprises a plurality of LED lamp groups arranged along the side edges of the edge area, each LED lamp group comprises a first color LED lamp bead and at least one non-first color LED lamp bead, and the central area is provided with a plurality of first color LED lamp beads arranged in an array mode. The application can effectively improve the display uniformity of the whole display device.

Description

Backlight module and display device
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
In recent years, with the rapid development of organic electroluminescent display technology, conventional liquid crystal display devices have presented certain disadvantages in terms of color saturation and the like, and high-color-gamut liquid crystal display devices have been developed.
In the prior art, the high-color-gamut liquid crystal display device achieves the high-color-gamut display effect by adopting the quantum dot technology in the backlight module. Specifically, the backlight module comprises a light source assembly and a quantum dot film layer arranged on the light emitting side of the light source assembly. As shown in fig. 1, a light source assembly 1001 in a conventional backlight module includes blue LED lamp beads a arranged in an array. The quantum dots in the quantum dot film layer can be excited by blue light, and white light is generated after light mixing.
The prior quantum dot backlight module can generate peripheral quantity electron failure after reliability test or material aging, so that peripheral display content is blue, and the whole display picture is uneven and cannot be adjusted.
It should be noted that the information disclosed in the foregoing background section is only for enhancement of understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems in the prior art, the application aims to provide a backlight module and a display device, which improve the display uniformity of the whole display device.
The embodiment of the application provides a backlight module, which comprises a light source assembly, wherein the light source assembly comprises a central area and an edge area surrounding the central area, the edge area is provided with at least one LED lamp row, each LED lamp row comprises a plurality of LED lamp groups arranged along the side edge of the edge area, each LED lamp group comprises a first color LED lamp bead and at least one non-first color LED lamp bead, and the central area is provided with a plurality of first color LED lamp beads arranged in an array mode.
In some embodiments, in each of the LED light groups, the non-first color LED light beads may emit white light, or the non-first color LED light beads and the first color LED light beads may be combined to emit white light.
In some embodiments, the first color LED light bead is a blue LED light bead, and the backlight module further includes a quantum dot film layer excited by blue light on the light emitting side of the light source assembly, where the quantum dot film layer at least covers the blue LED light bead in the edge area and the center area.
In some embodiments, the non-first color LED light beads comprise white LED light beads; or alternatively, the first and second heat exchangers may be,
the non-first color LED lamp beads comprise red LED lamp beads and green LED lamp beads; or alternatively, the first and second heat exchangers may be,
the non-first color LED lamp beads comprise red LED lamp beads, green LED lamp beads and white LED lamp beads.
In some embodiments, the entire first color LED beads of the light source assembly are uniformly arranged in an array.
In some embodiments, the non-first color LED light beads include second color LED light beads, the second color LED light beads being located on a side of the first color LED light beads along a first direction and on a side of the first color LED light beads along a second direction in each of the LED light groups.
In some embodiments, the non-first color LED light beads include second color LED light beads and third color LED light beads, the second color LED light beads being located on one side of the first color LED light beads in a first direction and the third color LED light beads being located on one side of the second color LED light beads in a second direction in each of the LED light groups.
In some embodiments, each side edge of the edge region is provided with one or more uniformly distributed LED light bars.
In some embodiments, the device further includes a light sensing unit, configured to sense a light emitting color and a light emitting brightness corresponding to the edge area.
In some embodiments, further comprising: the first driving circuit is used for driving a plurality of LED lamp groups in the edge area; and a second driving circuit for driving a plurality of the first color LED lamp beads in the central area.
The embodiment of the application also provides a display device which comprises a display panel and the backlight module, wherein the display panel is arranged on the light emitting side of the backlight module.
The backlight module and the display device provided by the application have the following advantages:
according to the application, the central area is provided with the plurality of first color LED lamp beads arranged in the array form, and the edge area is provided with the first color LED lamp beads and at least one non-first color LED lamp bead, so that the chromaticity and the whole brightness of the edge area are adjustable, when the peripheral quantum dots fail, the brightness of the first color LED lamp beads and the non-first color LED lamp beads in the edge area can be controlled according to the failure degree, the brightness degree and the chromaticity of the edge area are controlled to realize compensation, and the integral display uniformity of the display device is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.
FIG. 1 is a top view of a light source assembly of a backlight module according to the prior art;
FIG. 2 is a schematic diagram of a display device according to an embodiment of the application;
FIG. 3 is a top view of a light source assembly of a backlight module according to an embodiment of the application;
FIG. 4 is a partial top view of a light source assembly of a backlight module according to an embodiment of the application;
FIG. 5 is a top view of a light source assembly of a backlight module according to another embodiment of the application;
FIG. 6 is a partial top view of a light source assembly of a backlight module according to another embodiment of the present application;
FIG. 7 is a top view of a light source assembly of a backlight module according to still another embodiment of the present application;
fig. 8 is a partial top view of a light source assembly of a backlight module according to still another embodiment of the present application.
Reference numerals:
1001. existing light source component 200 quantum dot film layer
10. Backlight module 20 display panel
100. Blue LED lamp bead of light source assembly A
101. Central area B red LED lamp bead
102 edge area C green LED lamp bead
1021LED lamp bank D white LED lamp bead
1022LED lamp set
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. "or", "or" in the specification may each mean "and" or ". Although the terms "upper", "lower", "between", etc. may be used in this specification to describe various exemplary features and elements of the application, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the application. Although the terms "first" or "second" etc. may be used herein to describe certain features, these features should be interpreted in a descriptive sense only and not for purposes of limitation as to the number and importance of the particular features.
The embodiment of the application provides a backlight module and a display device comprising the same, wherein the backlight module comprises a light source assembly, the light source assembly comprises a central area and an edge area surrounding the central area, the edge area is provided with at least one LED lamp row, each LED lamp row comprises a plurality of LED lamp groups arranged along the side edge of the edge area, each LED lamp group comprises a first color LED lamp bead and at least one non-first color LED lamp bead, and the central area is provided with a plurality of first color LED lamp beads arranged in an array mode. The display device comprises a display panel and the backlight module, wherein the display panel is arranged on the light emitting side of the backlight module. By adopting the structure, the application realizes that the chromaticity and the whole brightness of the edge area are adjustable, when the peripheral quantum dots fail, the brightness of the first color LED lamp beads and the brightness of the non-first color LED lamp beads of the edge area can be controlled according to the failure degree, the brightness degree and the chromaticity of the edge area are controlled to realize compensation, and the application is beneficial to improving the whole display uniformity of the display device.
The structure of the backlight unit and the display device in the embodiment will be described in detail with reference to the accompanying drawings. It is to be understood that the drawings and the following description are only exemplary and are not intended to limit the scope of the application.
As shown in fig. 2, an embodiment of the present application provides a display device. The display device includes a display panel 20 and the backlight module 10, wherein the display panel 20 is disposed on a light emitting side of the backlight module 10, and the display panel 20 is, for example, a liquid crystal display panel. The display device may be any electronic apparatus having a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television. As shown in fig. 2 and 3, the backlight module 10 includes a light source assembly 100 and a quantum dot film layer 200 disposed on a light emitting side of the light source assembly 100, the light source assembly 100 includes a plurality of LED lamp beads arranged in an array, and the quantum dot film layer 200 at least covers the blue LED lamp beads a of the edge region 102 and the central region 101. As shown in fig. 3 and 4, the light source assembly 100 includes a central region 101 and an edge region 102 surrounding the central region 101, the edge region 102 is provided with at least one LED lamp row 1021, each LED lamp row 1021 includes a plurality of LED lamp groups 1022 arranged along a side of the edge region 102, each LED lamp group 1022 includes a first color LED lamp bead and at least one non-first color LED lamp bead, and the central region 101 is provided with a plurality of first color LED lamp beads arranged in an array. The non-first color LED lamp beads comprise second color LED lamp beads and third color LED lamp beads, in each LED lamp group 1022, the second color LED lamp beads are located on one side of the first color LED lamp beads along the first direction, and the third color LED lamp beads are located on one side of the second color LED lamp beads along the second direction. In the view angle of fig. 3, the first direction is the up-down direction, and the second direction is the left-right direction.
In this embodiment, the quantum dot film 200 is a blue light excited quantum dot film. The first color LED lamp bead is a blue LED lamp bead A, the second color LED lamp bead is a red LED lamp bead B, and the third color LED lamp bead is a green LED lamp bead C. Each LED lamp group 1022 comprises a blue LED lamp bead a, a red LED lamp bead B disposed below the blue LED lamp bead a, and a green LED lamp bead C disposed on the right side of the blue LED lamp bead a, and each LED lamp group 1022 can be combined to emit white light, so that chromaticity and brightness of the edge area 102 can be adjusted, and brightness of the central area 101 can be adjusted. In another alternative embodiment, the positions of the red LED bead B and the green LED bead C may be interchanged, and in other alternative embodiments, the red LED bead B may be located above or to the left of the blue LED bead a, and the green LED bead C may be located to the left or above the blue LED bead a, without affecting the achievement of the object of the present application. When the quantum dots of the quantum dot film layer 200 corresponding to the edge area 102 fail, the brightness of the red LED lamp beads B and the green LED lamp beads C can be controlled, and the failure is compensated by controlling the brightness degree or the brightness range according to the failure degree, so that the edge area 102 can not display bluish even if the edge quantum dots fail.
In this embodiment, it is schematically shown that two LED lamp rows 1021 are provided on each side of the edge area 102, that is, two lateral LED lamp rows 1021 are provided on the upper side and the lower side, respectively, in each lateral LED lamp row 1021, the LED lamp groups 1022 are arranged in a row form, two longitudinal LED lamp rows 1021 are provided on the left side and the right side, respectively, and in each longitudinal LED lamp row 1021, the LED lamp groups 1022 are arranged in a column form. In other embodiments, the number of LED light bars per side set may be selected to be other, and the number of LED light bars per side set may be the same or different. When a plurality of LED lamp rows are arranged on one side, the LED lamp rows on the side are uniformly distributed, and the LED lamp beads on the side are uniformly distributed, so that the uniformity of front light emission can be effectively improved, and the color of each LED lamp group combined light emission can be conveniently controlled when the edge quantum dots fail.
In this embodiment, all the first color LED beads of the light source assembly 100 are uniformly arranged in an array form on the whole plane of the backlight module 10, that is, the spacing between two adjacent rows of blue LED beads a is fixed in the edge area 102 and the center area 101, and the spacing between two adjacent columns of blue LED beads a is fixed. When the edge quantum dot failure does not occur, the red LED lamp beads B and the green LED lamp beads C can not be started, and the uniformly arranged blue LED lamp beads A can effectively ensure the uniformity of whole-surface light emission.
In this embodiment, the backlight module 10 further includes one or more light sensing units, which may be disposed on the light emitting side of the backlight module corresponding to the edge area 102, for sensing the light emitting color and the light emitting brightness corresponding to the edge area 102. The backlight module 10 further includes a driving circuit for driving the LED lamp beads of the light source assembly 100. The driving circuit may include a first driving circuit and a second driving circuit. The first driving circuit is configured to drive the plurality of LED lamp groups 1022 in the edge area 102, and the second driving circuit is configured to drive the plurality of LED lamp beads in the first color in the central area 101. Specifically, the first driving circuit may control the brightness degree and the brightness range of the red LED beads B and the green LED beads C according to the light emission color and the light emission brightness of the edge region 102 sensed by the light sensing unit. When the edge quantum dots are not failed, the first driving circuit may not drive the red LED lamp beads B and the green LED lamp beads C to emit light, but only drive the blue LED lamp beads a of the edge region 102 to emit light, and the second driving circuit may drive the blue LED lamp beads a of the central region 101 to emit light. When the light sensing unit senses that the edge light emitting chromaticity is blue or abnormal in brightness, the first driving circuit controls the brightness degree and the brightness range of the red LED lamp beads B and the green LED lamp beads C according to the brightness and the chromaticity sensed by the light sensing unit, and compensates for the failure of the quantum dots. The first driving circuit and the second driving circuit may also be implemented by the same driving circuit, wherein the partitions control the edge area and the center area, respectively. LED lamp beads on different sides can also be controlled by adopting different driving circuits, so that independent control of each side is realized, each side can also be divided into a plurality of areas, each area is independently controlled, more accurate edge failure compensation control can be realized, for example, each LED lamp row 1021 is independently controlled, and compensation is accurately performed on positions where quantum dot failure occurs.
In this embodiment, the light sensing unit may also be disposed on the light emitting side of the backlight module corresponding to the central area 101, so as to sense the light emitting color and the light emitting brightness of the central area 101. According to the detection data (light-emitting brightness and light-emitting color) of the light-sensing units corresponding to the edge area 102 and the central area 101 of the backlight module, the driving currents of the first driving circuit and the second driving circuit can be controlled, and the display chromaticity and the brightness uniformity of the whole display picture can be improved.
Fig. 5 and 6 are top views of a light source assembly 100 of a backlight module 10 according to another embodiment of the present application. In this further embodiment, the light source assembly 100 includes a central region 101 and an edge region 102 surrounding the central region 101, the edge region 102 is provided with at least one LED lamp row 1021, each LED lamp row 1021 includes a plurality of LED lamp groups 1022 arranged along a side of the edge region 102, each LED lamp group 1022 includes a first color LED lamp bead and at least one non-first color LED lamp bead, and the central region 101 is provided with a plurality of first color LED lamp beads arranged in an array. The non-first color LED light beads include second color LED light beads, and in each of the LED light groups 1022, the second color LED light beads are located at one side of the first color LED light beads along the first direction and one side of the second direction. In the view angle of fig. 5, the first direction is the up-down direction, and the second direction is the left-right direction.
In this embodiment, the first color LED bead is a blue LED bead a, and the second color LED bead is a white LED bead D, that is, the non-first color LED bead may emit white light alone. Each of the LED lamp groups 1022 includes a blue LED lamp bead a and a white LED lamp bead D disposed at the lower right of the blue LED lamp bead a, so that the chromaticity and the brightness of the edge area 102 are adjustable, and the brightness of the central area 101 is adjustable. In another alternative embodiment, the white LED lamp bead D may be disposed directly above, directly below, directly left side, directly right side, directly left upper side, etc. of the blue LED lamp bead a without affecting the achievement of the object of the present application. When the quantum dots of the quantum dot film layer 200 corresponding to the edge area 102 fail, the brightness of the white LED lamp beads D can be controlled, and the failure is compensated by controlling the brightness degree or the brightness range according to the failure degree, so that the edge area 102 does not display bluish color even if the edge quantum dot fails.
In this embodiment, two LED lamp rows 1021 are schematically shown disposed on each side of the edge region 102. In other embodiments, the number of LED light bars per side set may be selected to be other, and the number of LED light bars per side set may be the same or different.
In this embodiment, all the first color LED beads of the light source assembly 100 are uniformly arranged in an array form on the entire plane of the backlight module 10. When the edge quantum dot failure does not occur, the white LED lamp beads D can not be started, and the uniformly arranged blue LED lamp beads A can effectively ensure the uniformity of whole-surface light emission.
In this embodiment, the backlight module 10 further includes one or more light sensing units, which may be disposed on the light emitting side of the edge area 102, for sensing the light emitting color and the light emitting brightness corresponding to the edge area 102. The backlight module 10 further includes a driving circuit for driving the LED lamp beads of the light source assembly 100. The driving circuit may include a first driving circuit and a second driving circuit. The first driving circuit is configured to drive the plurality of LED lamp groups 1022 in the edge area 102, and the second driving circuit is configured to drive the plurality of LED lamp beads in the first color in the central area 101. Specifically, the first driving circuit may control the brightness degree and the brightness range of the white LED beads D according to the light emitting color and the light emitting brightness of the edge region 102 sensed by the light sensing unit. When the edge quantum dots are not failed, the first driving circuit may not drive the white LED lamp beads D to emit light, but only drive the blue LED lamp beads a of the edge region 102 to emit light, and the second driving circuit may drive the blue LED lamp beads a of the central region 101 to emit light. When the light sensing unit senses that the edge light emitting chromaticity is blue or abnormal in brightness, the first driving circuit controls the brightness degree and the brightness range of the white LED lamp beads D according to the brightness and the chromaticity sensed by the light sensing unit, and compensates for the failure of the quantum dots. For example, when the failure condition of the edge quantum dots is not serious, the blue LED lamp beads a and the white LED lamp beads D in each LED lamp group 1022 can be controlled to emit light, so that the brightness of the blue LED lamp beads a is dimmed. When the edge quantum dot failure condition is serious, the blue LEDs in each LED lamp group 1022 can be controlled to not emit light, and only the white LEDs emit light. The first driving circuit and the second driving circuit may also be implemented by the same driving circuit, wherein the partitions control the edge area and the center area, respectively. LED lamp beads on different sides can also be controlled by adopting different driving circuits, so that independent control of each side is realized, each side can also be divided into a plurality of areas, each area is independently controlled, more accurate edge failure compensation control can be realized, for example, each LED lamp row 1021 is independently controlled, and compensation is accurately performed on positions where quantum dot failure occurs.
In this embodiment, the light sensing unit may also be disposed on the light emitting side of the backlight module corresponding to the central area 101, so as to sense the light emitting color and the light emitting brightness of the central area 101. According to the detection data (light-emitting brightness and light-emitting color) of the light-sensing units corresponding to the edge area 102 and the central area 101 of the backlight module, the driving currents of the first driving circuit and the second driving circuit can be controlled, and the display chromaticity and the brightness uniformity of the whole display picture can be improved.
Fig. 7 and 8 are top views illustrating a light source assembly 100 of a backlight module 10 according to still another embodiment of the present application. In this further embodiment, the light source assembly 100 includes a central region 101 and an edge region 102 surrounding the central region 101, the edge region 102 is provided with at least one LED lamp row 1021, each LED lamp row 1021 includes a plurality of LED lamp groups 1022 arranged along a side of the edge region 102, each LED lamp group 1022 includes a first color LED lamp bead and at least one non-first color LED lamp bead, and the central region 101 is provided with a plurality of first color LED lamp beads arranged in an array. The non-first color LED lamp beads comprise second color LED lamp beads, third color LED lamp beads and fourth color LED lamp beads, in each LED lamp group 1022, the second color LED lamp beads are located on one side of the first color LED lamp beads along the first direction, the third color LED lamp beads are located on one side of the first color LED lamp beads along the second direction, and the fourth color LED lamp beads are located on one side of the first color LED lamp beads along the first direction and one side of the second direction. In the view angle of fig. 7, the first direction is the up-down direction, and the second direction is the left-right direction.
In this embodiment, the first color LED bead is a blue LED bead a, the second color LED bead is a red LED bead B, the third color LED bead is a green LED bead C, and the fourth color LED bead is a white LED bead D. I.e., each of the LED light groups 1022 may combine to emit white light. Each LED lamp group 1022 includes a blue LED lamp bead a, a red LED lamp bead B disposed on the right side of the blue LED lamp bead a, a green LED lamp bead C disposed below the green LED lamp bead C, and a white LED lamp bead D disposed below the blue LED lamp bead a on the right side, so that the chromaticity and the brightness of the edge area 102 are adjustable, and the brightness of the center area 101 is adjustable. In other alternative embodiments, the positions of the various color LED beads may be interchanged or provided at other side positions with respect to the blue LED bead a without affecting achievement of the object of the present application. When the quantum dots of the quantum dot film layer 200 corresponding to the edge area 102 fail, the brightness of the red LED lamp bead B, the green LED lamp bead C and the white LED lamp bead D can be controlled, and the brightness degree or the brightness range is controlled according to the failure degree to compensate the failure, so that the edge area 102 cannot display bluish color even if the edge quantum dots fail.
In this embodiment, two LED lamp rows 1021 are schematically shown disposed on each side of the edge region 102. In other embodiments, the number of LED light bars per side set may be selected to be other, and the number of LED light bars per side set may be the same or different.
In this embodiment, all the first color LED beads of the light source assembly 100 are uniformly arranged in an array form on the entire plane of the backlight module 10. When the edge quantum dot failure does not occur, the red LED lamp beads B, the green LED lamp beads C and the white LED lamp beads D can not be started, and the uniformly arranged blue LED lamp beads A can effectively ensure the uniformity of whole-surface light emission.
In this embodiment, the backlight module 10 further includes one or more light sensing units, which may be disposed on the light emitting side of the edge area 102, for sensing the light emitting color and the light emitting brightness corresponding to the edge area 102. The backlight module 10 further includes a driving circuit for driving the LED lamp beads of the light source assembly 100. The driving circuit may include a first driving circuit and a second driving circuit. The first driving circuit is configured to drive the plurality of LED lamp groups 1022 in the edge area 102, and the second driving circuit is configured to drive the plurality of LED lamp beads in the first color in the central area 101. Specifically, the first driving circuit may control the brightness degree and the brightness range of the white LED beads D according to the light emitting color and the light emitting brightness of the edge region 102 sensed by the light sensing unit. When the edge quantum dots are not failed, the first driving circuit may not drive the red LED lamp beads B, the green LED lamp beads C and the white LED lamp beads D to emit light, but only drive the blue LED lamp beads a of the edge region 102 to emit light, and the second driving circuit may drive the blue LED lamp beads a of the central region 101 to emit light. When the light sensing unit senses that the edge light emitting chromaticity is blue or abnormal in brightness, the first driving circuit controls the brightness degree and the brightness range of the red LED lamp bead B, the green LED lamp bead C and the white LED lamp bead D according to the brightness and the chromaticity sensed by the light sensing unit, and compensates for the failure of the quantum dots. The first driving circuit and the second driving circuit may also be implemented by the same driving circuit, wherein the partitions control the edge area and the center area, respectively. LED lamp beads on different sides can also be controlled by adopting different driving circuits, so that independent control of each side is realized, each side can also be divided into a plurality of areas, each area is independently controlled, more accurate edge failure compensation control can be realized, for example, each LED lamp row 1021 is independently controlled, and compensation is accurately performed on positions where quantum dot failure occurs.
In this embodiment, the light sensing unit may also be disposed on the light emitting side of the backlight module corresponding to the central area 101, so as to sense the light emitting color and the light emitting brightness of the central area 101. According to the detection data (light-emitting brightness and light-emitting color) of the light-sensing units corresponding to the edge area 102 and the central area 101 of the backlight module, the driving currents of the first driving circuit and the second driving circuit can be controlled, and the display chromaticity and the brightness uniformity of the whole display picture can be improved.
The above embodiments schematically show different combinations of the light beads for each LED light group. In other alternative embodiments, the color of the LED lamp beads of the non-first color is not limited to the examples in the above embodiments, but may be selected as a combination of LED lamp groups of other colors as needed. Preferably, in each LED lamp group, the LED lamp beads of the non-first color may emit white light, or the LED lamp beads of the non-first color and the LED lamp beads of the first color may be combined to emit white light. When the edge quantum dots fail, the LED lamp beads of the first color and the LED lamp groups of the non-first color are controlled in brightness degree and brightness range, so that the LED lamp beads of the first color can be combined with the LED lamp beads of the non-first color to emit white light, and the LED lamp beads of the non-first color can be combined with the LED lamp beads of the non-first color to emit white light.
In other alternative embodiments, the backlight module may use a non-blue LED to excite the quantum dot film layer, and the first color LED beads may be other color LED beads, and the color of the non-first color LED beads may be selected according to the need.
The foregoing is a further detailed description of the application in connection with the preferred embodiments, and it is not intended that the application be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the application, and these should be considered to be within the scope of the application.

Claims (11)

1. A backlight module, comprising:
the light source assembly comprises a central area and an edge area surrounding the central area, wherein the edge area is provided with at least one LED lamp row, each LED lamp row comprises a plurality of LED lamp groups arranged along the side edges of the edge area, each LED lamp group comprises a first color LED lamp bead and at least one non-first color LED lamp bead, and the central area is provided with a plurality of first color LED lamp beads arranged in an array mode.
2. The backlight module of claim 1, wherein in each of the LED lamp groups, the non-first color LED lamp beads can emit white light, or the non-first color LED lamp beads and the first color LED lamp beads can be combined to emit white light.
3. The backlight module of claim 2, wherein the first color LED beads are blue LED beads, and further comprising a quantum dot film layer excited by blue light on the light-emitting side of the light source assembly, the quantum dot film layer covering at least the blue LED beads in the edge region and the center region.
4. The backlight module of claim 2, wherein the non-first color LED beads comprise white LED beads; or alternatively, the first and second heat exchangers may be,
the non-first color LED lamp beads comprise red LED lamp beads and green LED lamp beads; or alternatively, the first and second heat exchangers may be,
the non-first color LED lamp beads comprise red LED lamp beads, green LED lamp beads and white LED lamp beads.
5. The backlight module according to claim 1, wherein the whole first color LED lamp beads of the light source assembly are uniformly arranged in an array form.
6. A backlight module according to claim 1, wherein the non-first color LED beads comprise second color LED beads, the second color LED beads being located on one side of the first color LED beads in a first direction and on one side of the second color LED beads in each of the LED light groups.
7. The backlight module of claim 1, wherein the non-first color LED beads comprise second color LED beads and third color LED beads, wherein in each of the LED lamp sets, the second color LED beads are located on one side of the first color LED beads along a first direction, and the third color LED beads are located on one side of the second color LED beads along a second direction.
8. A backlight module according to claim 1, wherein each side edge of the edge area is provided with one or more uniformly distributed LED light bars.
9. A backlight module according to claim 1, further comprising a light sensing unit for sensing a light emission color and a light emission brightness corresponding to the edge region.
10. A backlight module according to claim 1, further comprising:
the first driving circuit is used for driving a plurality of LED lamp groups in the edge area;
and the second driving circuit is used for driving a plurality of the first-color LED lamp beads in the central area.
11. A display device comprising a display panel and a backlight module according to any one of claims 1 to 10, wherein the display panel is disposed on a light emitting side of the backlight module.
CN202310440064.2A 2023-04-20 2023-04-20 Backlight module and display device Pending CN116577951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310440064.2A CN116577951A (en) 2023-04-20 2023-04-20 Backlight module and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310440064.2A CN116577951A (en) 2023-04-20 2023-04-20 Backlight module and display device

Publications (1)

Publication Number Publication Date
CN116577951A true CN116577951A (en) 2023-08-11

Family

ID=87544487

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310440064.2A Pending CN116577951A (en) 2023-04-20 2023-04-20 Backlight module and display device

Country Status (1)

Country Link
CN (1) CN116577951A (en)

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