CN113433738A - Backlight module and display terminal - Google Patents
Backlight module and display terminal Download PDFInfo
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- CN113433738A CN113433738A CN202110767233.4A CN202110767233A CN113433738A CN 113433738 A CN113433738 A CN 113433738A CN 202110767233 A CN202110767233 A CN 202110767233A CN 113433738 A CN113433738 A CN 113433738A
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- Prior art keywords
- light
- light source
- guide plate
- backlight module
- circuit board
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to the light guide
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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
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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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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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
- G02F1/133608—Direct backlight including particular frames or supporting means
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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
- G02F1/133612—Electrical details
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application provides a backlight module and a display terminal; the backlight module comprises a light source assembly and a light guide plate arranged in the light emitting direction of the light source assembly, wherein the light source assembly comprises a first light source belt and a second light source belt which are oppositely arranged, the first light source belt comprises a first flexible circuit board and a plurality of first light-emitting devices arranged on the first flexible circuit board, the second light source belt comprises a second flexible circuit board and a plurality of second light-emitting devices arranged on the second flexible circuit board, and the first light-emitting devices and the second light-emitting devices are attached to one side of the light guide plate; this application is through setting up the light source subassembly into first light source area and second light source area, makes to have two sets of light source areas among the backlight unit, sets up more luminescent device in the limited inner space of display device, has solved the unable problem that further improves of display device's at present stage demonstration luminance.
Description
Technical Field
The application relates to the field of display, in particular to a backlight module and a display terminal.
Background
With the development of display technology, the demand of people for display brightness is higher and higher. However, in the display device, due to the limitation of the size of the device, the setting length of the light source strip in the backlight module is limited, and due to the limitation of the structure and the manufacturing process of the light emitting device, more light emitting devices cannot be arranged on the light source strip, so that the display brightness of the display device cannot be further improved, and the display effect needs to be further improved.
Therefore, a backlight module and a display device capable of further improving the display brightness are needed.
Disclosure of Invention
The application provides a backlight module and a display device to improve the technical problem that the display brightness of the existing display equipment cannot be further improved.
In order to solve the technical problem, the technical scheme provided by the application is as follows:
the application provides a backlight module, which comprises a light source component and a light guide plate arranged in the light emergent direction of the light source component;
the light source assembly comprises a first light source strip and a second light source strip which are oppositely arranged, the first light source strip comprises a first flexible circuit board and a plurality of first light-emitting devices arranged on the first flexible circuit board, and the second light source strip comprises a second flexible circuit board and a plurality of second light-emitting devices arranged on the second flexible circuit board;
the first light emitting device and the second light emitting device are attached to one side of the light guide plate.
In the backlight module of the present application, the first flexible circuit board and the second flexible circuit board are located at two sides of the light guide plate, and the first light emitting devices and the second light emitting devices are arranged in a staggered manner along a first direction;
wherein the first direction is an extending direction of the first light source stripe and the second light source stripe.
In the backlight module of the present application, the first light emitting devices and the second light emitting devices are arranged at equal intervals along the first direction;
the distance between two adjacent first light-emitting devices is equal to the distance between two adjacent second light-emitting devices;
the ratio of the spacing between the first light emitting device and the second light emitting device to the spacing between two adjacent first light emitting devices or two adjacent second light emitting devices is greater than 0.1 and less than 1.
In the backlight module of this application, the light guide plate include go out the plain noodles and with go out plain noodles parallel arrangement's plane of reflection, first flexible circuit board through first glue the material with the play plain noodles of light guide plate is connected, second flexible circuit board passes through the second glue the material with the plane of reflection of light guide plate is connected.
In the backlight module, the first adhesive material comprises a plurality of first double-sided adhesive blocks, the second adhesive material comprises a plurality of second double-sided adhesive blocks, and the first double-sided adhesive blocks and the second double-sided adhesive blocks are arranged in the first direction at equal intervals;
the first end of the first double-sided adhesive block is flush with the first light-emitting device, and the second end of the first double-sided adhesive block is flush with the edge of the first flexible circuit board;
the first end of the second double-sided adhesive is flush with the second light emitting device, and the second end of the second double-sided adhesive block is flush with the edge of the second flexible circuit board.
In the backlight module of the present application, the first light source band further includes at least one first protruding end, and the second light source band further includes at least one second protruding end;
the first extending end and the second extending end are arranged in a staggered mode along the first direction.
In the backlight module of the present application, the backlight module further includes a back frame, and the light guide plate and the light source assembly are disposed in the back frame;
wherein, at least one side of back of the body frame is provided with first U type groove, the opening direction orientation in first U type groove the light guide plate, the light source subassembly set up in first U type inslot, and first U type groove covers the light source subassembly.
In the backlight module of the present application, the backlight module further includes a back frame, and the light guide plate and the light source assembly are disposed in the back frame;
the backlight module comprises a back frame, a light guide plate, a light source assembly, a back frame and a back frame, wherein a second U-shaped groove is formed in the back frame, the opening direction of the second U-shaped groove is perpendicular to the light emergent surface of the light guide plate, and the light source assembly are arranged in the second U-shaped groove.
In the backlight module of the application, the backlight module further comprises an optical adjusting layer and a shading glue, wherein the optical adjusting layer and the shading glue are positioned on one side of the light emitting surface of the light guide plate;
the shading glue extends from the edge of the backlight module to the optical adjusting layer, and the shading glue and the optical adjusting layer have an overlapping part.
In the backlight module of this application, the back of the body frame is kept away from the side of light guide plate is provided with the glue film of borduring, the glue film of borduring extends to the cover the shading is glued.
The application also provides a display terminal, including terminal main part, display panel and above-mentioned backlight unit, terminal main part, display panel and backlight unit combination are as an organic whole.
Has the advantages that: this application is through setting up the light source subassembly into first light source area and second light source area, makes to have two sets of light source areas among the backlight unit, has reduced the restriction that the display device size arranged quantity to the emitting device on the single light source area, sets up more emitting devices promptly in the limited inner space of display device to reinforcing display device's demonstration luminance. And first light source area includes first flexible circuit board in this application, and second light source area includes the second flexible circuit board, and two light source areas contain independent flexible circuit board respectively promptly for two light source areas can independently give out light through lower electric current, also improve flexible circuit board's heat dispersion when reducing backlight unit's consumption, solve because the problem of generating heat that more quantity of luminescent device brought.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a first structural diagram of a backlight module according to the present application;
FIG. 2 is a first block diagram of the first light source band and the second light source band of the present application;
fig. 3 is a partial arrangement structure diagram of the first light emitting device and the second light emitting device according to the present application;
FIG. 4 is a second block diagram of the first light source band and the second light source band of the present application;
FIG. 5 is a third block diagram of the first light source band and the second light source band of the present application;
FIG. 6 is a first combination structure of the backlight module and the display panel according to the present disclosure;
FIG. 7 is a second combination structure of the backlight module and the display panel according to the present disclosure;
FIG. 8 is a third combination structure of the backlight module and the display panel according to the present disclosure;
fig. 9 is a fourth combination structure diagram of the backlight module and the display panel according to the present application.
Description of reference numerals:
the backlight module 100, the back frame 110, the first U-shaped groove 111, the second U-shaped groove 112, the light guide plate 120, the light emitting surface 121, the reflecting surface 122, the thickness side 123, the light source assembly 130, the first light source band 131, the first flexible circuit board 1311, the first light emitting device 1312, the first double-sided adhesive block 1313, the first protruding end 1314, the second light source band 132, the second flexible circuit board 1321, the second light emitting device 1322, the second double-sided adhesive block 1323, the second protruding end 1324, the optical test point 133, the optical adjustment layer 140, the lower diffusion sheet 141, the lower prism sheet 142, the upper prism sheet 143, the upper diffusion sheet 144, the reflecting sheet 150, the light shielding adhesive 160, the heat dissipation member 170, the edge-covered adhesive layer 180, the display panel 200, the array substrate 210, the color film substrate 220, the upper polarizer 230, the lower polarizer 240, the driving chip 250, and the third.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
With the development of LCD display technology, people's demand for display brightness is also increasing, and high brightness display modules become an important development direction in the LCD display field. However, due to the limitation of the size of the display device, the length of the light bars in the backlight module is limited, and the light bars are limited by the spacing between the members (the space required by the welding leg and the welding member), so that the arrangement of more light bars cannot be realized, the display brightness of the display device cannot be further improved, and the display effect needs to be further improved. The present application proposes the following solutions based on the above technical problems.
The following are detailed below, and it should be noted that the order of description of the following examples is not intended to limit the preferred order of the examples.
Referring to fig. 1 to 9, an embodiment of the present disclosure provides a backlight module including a back frame 110, and a light guide plate 120 and a light source assembly 130 disposed in the back frame 110. The light source assembly 130 is disposed at one side of the light guide plate 120, and the light guide plate 120 is located at a light emitting side of the light source assembly 130. The light guide plate 120 includes a light emitting surface 121 and a reflecting surface 122 parallel to the light emitting surface 121, a thickness direction of the light guide plate 120 is perpendicular to the light emitting surface 121 and the reflecting surface 122, and the back frame 110 is located on one side of the reflecting surface 122 of the light guide plate 120.
Referring to fig. 2, the light source assembly 130 includes a first light source strip 131 and a second light source strip 132, and the first light source strip 131 and the second light source strip 132 are strip-shaped light bars extending along the side edge of the light guide plate 120 and attached to the light guide plate 120. The first light source string 131 includes a first flexible circuit board 1311 and a plurality of first light emitting devices 1312 disposed on the first flexible circuit board 1311. The second light source tape 132 includes a second flexible circuit board 1321 and a plurality of second light emitting devices 1322 disposed on the second flexible circuit board 1321.
In this embodiment, the first flexible circuit board 1311 and the second flexible circuit board 1321 may be printed circuit boards made of polyimide or polyester film, and the first light emitting device 1312 and the second light emitting device 1322 may be light emitting diodes, such as point light source devices made of LEDs or other electroluminescent materials. In this embodiment, the first light emitting device 1312 and the second light emitting device 1322 may be attached to the light guide plate 120, so as to reduce light leakage of the first light emitting device 1312 and the second light emitting device 1322.
The present embodiment enables two sets of light source bands to exist in the backlight module 100 by setting the light source assembly 130 as the first light source band 131 and the second light source band 132, so that the limitation of the size of the display device to the arrangement number of the light emitting devices in a single light source band is reduced, that is, more light emitting devices are arranged in the limited inner space of the display device, thereby enhancing the display brightness of the display device. In addition, in this embodiment, the two light source strips each include an independent flexible circuit board, so that the two light source strips can independently emit light through a lower current, the power consumption of the backlight module 100 is reduced, the heat dissipation performance of the flexible circuit board is also improved, and the problem of heat generation caused by a greater number of light emitting devices is solved.
The technical solution of the present application will now be described with reference to specific embodiments.
In the backlight module of the present application, please refer to fig. 1, fig. 1 is a first structural diagram of the backlight module 100, the first flexible circuit board 1311 and the second flexible circuit board 1321 are located at two sides of the light guide plate 120, wherein the first flexible circuit board 1311 is disposed on the light emitting surface 121 of the light guide plate 120, and the second flexible circuit board 1321 is disposed on the reflecting surface 122 of the light guide plate 120.
In this embodiment, the first flexible circuit board 1311 extends from the light emitting surface 121 of the light guide plate 120 to protrude from the light guide plate 120, the first light emitting device 1312 is disposed on a portion of the first flexible circuit board 1311 protruding from the light guide plate 120, and the first light emitting device 1312 is disposed opposite to the thickness side 123 of the light guide plate 120. The second flexible circuit board 1321 extends from the reflective surface 122 of the light guide plate 120 to protrude out of the light guide plate 120, the second light emitting device 1322 is disposed on a portion of the second flexible circuit board 1321 protruding out of the light guide plate 120, and the second light emitting device 1322 is disposed opposite to the thickness side 123 of the light guide plate 120.
Referring to fig. 2, in the present embodiment, the first light emitting devices 1312 and the second light emitting devices 1322 may be alternately disposed along a first direction X, wherein the first direction X is an extending direction of the first light source strips 131 and the second light source strips 132. In order to reduce the thickness of the backlight module 100, in the first direction X (i.e., the extending direction of the first light source strips 131 and the second light source strips 132), the projection of the connecting line of the first light emitting devices 1312 and the connecting line of the second light emitting devices 1322 on the thickness side 123 of the light guide plate 120 coincide. In order to make the alignment of the first light emitting device 1312 and the second light emitting device 1322 more convenient and accurate when the first light emitting device 1312 and the second light emitting device 1322 are staggered, the first flexible circuit board 1311 and the second flexible circuit board 1321 are provided with optical test points 133 with corresponding positions, and when the optical test points 133 on the two flexible circuit boards are aligned, the first light emitting device 1312 and the second light emitting device 1322 are just staggered.
In the embodiment, the first flexible circuit board 1311 and the second flexible circuit board 1321 are disposed on both sides of the light guide plate 120, so that the two flexible circuits are not overlapped, that is, the heat dissipation area of the flexible circuit board is increased, thereby solving the problem of increased heat generation caused by the dual light source band. In addition, in the present embodiment, the first light emitting devices 1312 and the second light emitting devices 1322 are alternately arranged in the first direction X (the extending direction of the first light source strips 131 and the second light source strips 132), so that the first light emitting devices 1312 and the second light emitting devices 1322 do not overlap or block each other, the light emitting utilization rate of the light emitting devices is improved, and the display luminance is further improved.
In the backlight module of the present application, please refer to fig. 2 and 3, fig. 2 is a first structure diagram of the first light source strips 131 and the second light source strips 132, fig. 3 is a partial arrangement structure diagram of the first light emitting devices 1312 and the second light emitting devices 1322, the first light emitting devices 1312 and the second light emitting devices 1322 are arranged at equal intervals along the first direction X, and a distance between two adjacent first light emitting devices 1312 is equal to a distance between two adjacent second light emitting devices 1322, so that when the first light emitting devices 1312 and the second light emitting devices 1322 are staggered along the first direction X, the first light emitting devices 1312 and the second light emitting devices 1322 are arranged uniformly, thereby improving light emitting uniformity of the dual light source strips and improving display effect.
In the present embodiment, the distance between the first light emitting device 1312 and the second light emitting device 1322 is d1, and the distance between two adjacent first light emitting devices 1312 or two adjacent second light emitting devices 1322 is d2, wherein the ratio of d1 to d2 is greater than 0.1 and less than 1, i.e., 0.1 < d1/d2 < 1. In the conventional backlight module 100, a single light bar is limited by the limitation of the distance between two adjacent light emitting devices (the solder fillet of the light emitting device and the space required by welding the light emitting device), the distance between two adjacent light emitting devices is generally 1mm, and the embodiment can shorten the distance between the first light emitting device 1312 and the second light emitting device 1322 (i.e. the distance between two adjacent light emitting devices) to 0.2mm at the minimum through the above arrangement, that is, the embodiment can be arranged on light bars with the same length as the conventional backlight module 100, and has narrower spacing and more light emitting devices, so that not only the light emitting brightness is higher, but also the light emitting devices are arranged more closely, the light coupling before the light is better, and the problem of uneven brightness and darkness can be solved.
In the backlight module of the present application, the first flexible circuit board 1311 is connected to the light emitting surface 121 of the light guide plate 120 through a first adhesive material, and the second flexible circuit board 1321 is connected to the reflecting surface 122 of the light guide plate 120 through a second adhesive material. In this embodiment, the first adhesive material includes a plurality of first double-sided adhesive blocks 1313, the second adhesive material includes a plurality of second double-sided adhesive blocks 1323, the first double-sided adhesive blocks 1313 and the second double-sided adhesive blocks 1323 are disposed at equal intervals along the first direction X, and the first flexible circuit board 1311 and the second flexible circuit board 1321 can be respectively and firmly adhered to the light guide plate 120 by the first double-sided adhesive blocks 1313 and the second double-sided adhesive blocks 1323 disposed at equal intervals, so that the first flexible circuit board 1311 and the second flexible circuit board 1321 are not easily detached from the light guide plate 120.
In this embodiment, the first double-sided tape 1313 is disposed on a portion of the first flexible circuit board 1311 covering the light guide plate 120, and a first end of the first double-sided tape 1313 is flush with one side of the first light emitting device 1312, and a second end of the first double-sided tape 1313 is flush with an edge of the first flexible circuit board 1311 on the light guide plate 120. Correspondingly, the second double-sided adhesive block 1323 is disposed on a portion of the second flexible circuit board 1321 covering the light guide plate 120, and a first end of the second double-sided adhesive block 1323 is flush with one side of the second light emitting device 1322, and a second end of the second double-sided adhesive block 1323 is flush with an edge of the second flexible circuit board 1321 on the light guide plate 120.
In this embodiment, the first and second double- sided glue blocks 1313, 1323 may be triangular, square, rectangular, trapezoidal, circular, or other polygonal and irregular shapes. In the extending direction of the first light source tapes 131, i.e., the first direction X, the width of the first end of the first double sided tape 1313 is equal to the interval between two adjacent first light emitting devices 1312. Correspondingly, in the first direction X, which is the extending direction of the second light source tapes 132, the width of the first end of the second double-sided tape 1323 is equal to the pitch between two adjacent second light emitting devices 1322.
In this embodiment, the sizes of the first double-sided adhesive tape 1313 and the second double-sided adhesive tape 1323 can be increased by the above arrangement, so as to increase the adhering area, thereby improving the problems of small area and poor adhesion of the double-sided adhesive tape on the flexible circuit board in the backlight module 100 at the present stage.
In the backlight module of the present application, please refer to fig. 4 and 5, fig. 4 is a second structure diagram of the first light source band 131 and the second light source band 132, fig. 5 is a third structure diagram of the first light source band 131 and the second light source band 132, the first light source band 131 further includes at least one first protruding end 1314 electrically connected to the first flexible circuit board 1311, and the second light source band 132 further includes at least one second protruding end 1324 electrically connected to the second flexible circuit board 1321. For example, as shown in fig. 4, the first light source band 131 includes a first protruding end 1314, and the second light source band 132 includes a second protruding end 1324. Alternatively, as shown in fig. 5, the first light source band 131 includes two first protruding ends 1314, and the second light source band 132 includes two second protruding ends 1324.
It should be noted that the number of the first protruding ends 1314 on the first light source bands 131 and the number of the second protruding ends 1324 on the second light source bands 132 are related to the size of the display device, and the number of the first protruding ends 1314 and the number of the second protruding ends 1324 are not particularly limited by the embodiment of the present application.
In this embodiment, the extending directions of the first and second protruding ends 1314 and 1324 are perpendicular to the first direction X (i.e., the extending directions of the first and second light source bands 131 and 132), so that the protruding ends protrude from the flexible circuit board. In this embodiment, the extending ends are disposed on the two light source bands, so that the first light source band 131 and the second light source band 132 can be connected to the corresponding driving voltages and lines through the extending ends, thereby improving the convenience of circuit connection.
In this embodiment, the first protruding end 1314 may be integrally formed with the first flexible circuit board 1311 using the same material, and the second protruding end 1324 may be integrally formed with the second flexible circuit board 1321 using the same material. Thereby reducing the difficulty of the manufacturing process of the first protruding end 1314 and the second protruding end 1324 and reducing the manufacturing cost.
In this embodiment, the first protruding end 1314 and the second protruding end 1324 are alternately arranged along the first direction X, i.e. the extending direction of the first light source band 131 and the second light source band 132, so as to prevent the problem that the protruding ends are difficult to interface with the corresponding driving voltage and lines due to too close distance between different protruding ends on the same light source band.
In the backlight module of the present application, an optical adjustment layer 140 is disposed on one side of the light emitting surface 121 of the light guide plate 120, and a reflective sheet 150 is disposed on one side of the reflective surface 122 of the light guide plate 120. The optical adjustment layer 140 includes a lower diffusion sheet 141, a lower prism sheet 142, an upper prism sheet 143, and an upper diffusion sheet 144. The lower diffusion sheet 141 is attached to the light exit surface 121 of the light guide plate 120, the lower prism sheet 142 is attached to a side surface of the lower diffusion sheet 141 facing away from the light guide plate 120, the upper prism sheet 143 is attached to a side surface of the lower prism sheet 142 facing away from the lower diffusion sheet 141, and the upper diffusion sheet 144 is attached to a side surface of the upper prism sheet 143 facing away from the lower prism sheet 142. In this embodiment, the optical adjustment layer 140 is disposed on the light emitting surface 121 of the light guide plate 120 to adjust the light emitted from the light guide plate 120, so that the light incident into the display panel 200 is softer, and the display effect is improved.
In the display module of the present application, please refer to fig. 6, where fig. 6 is a first combined structure diagram of the backlight module 100 and the display panel 200, at least one side of the back frame 110 is provided with a first U-shaped groove 111, an opening direction of the first U-shaped groove 111 faces the light guide plate 120, the light source assembly 130 is disposed in the first U-shaped groove 111, and the first U-shaped groove 111 covers the light source assembly 130. The light source assembly 130 may extend from the inside of the first U-shaped groove 111 toward the side of the light guide plate 120 to the outside of the first U-shaped groove 111. In this embodiment, a side of the second flexible circuit board 1321 facing away from the reflective surface 122 of the light guide plate 120 is attached to an inner side surface of the back frame 110, where the inner side surface is a cavity surface of the back frame 110 for accommodating the light guide plate 120 and the light source assembly 130. The width of the notch of the first U-shaped groove 111 is greater than the thickness of the light source assembly 130, that is, in the thickness direction of the light guide plate 120, a gap exists between the first flexible circuit board 1311 and the groove wall of the first U-shaped groove 111, so as to reduce the difficulty of inserting the light source assembly 130 into the first U-shaped groove 111.
In this embodiment, a light shielding adhesive 160 is disposed on a groove wall of the first U-shaped groove 111 opposite to the light exit surface 121 of the light guide plate 120, the light shielding adhesive 160 is located on a side of the groove wall of the first U-shaped groove 111 far away from the light guide plate 120, and the light shielding adhesive 160 may be made of a light shielding adhesive tape or other opaque flexible materials.
In this embodiment, the first U-shaped groove 111 is disposed on the back frame 110, and the light source assembly 130 is disposed in the first U-shaped groove 111, so that the first U-shaped groove 111 can protect the light source assembly 130 well, and the light-receiving effect of the back frame 110 on the dual light source bands is improved, and the light-shielding adhesive 160 is matched to reduce the light leakage of the backlight module 100.
In the backlight module of the present application, please refer to fig. 7, fig. 7 is a second combined structure diagram of the backlight module 100 and the display panel 200, a second U-shaped groove 112 is disposed in the back frame 110, the light guide plate 120 and the light source assembly 130 are disposed in the second U-shaped groove 112, an opening direction of the second U-shaped groove 112 is perpendicular to the light emitting surface 121 of the light guide plate 120, that is, a cross section of the back frame 110 is a U shape with an opening direction perpendicular to the light emitting surface 121 of the light guide plate 120. In this embodiment, the back frame 110 is set to have a U-shaped structure with an opening perpendicular to the light emitting surface 121 of the light guide plate 120, so that the light guide plate 120 and the light source assembly 130 are placed in the back frame 110, and the operation is simpler, and the difficulty of the manufacturing process is reduced.
In the backlight module of the present application, the backlight module 100 further includes a heat dissipation member 170, the heat dissipation member 170 is disposed on the first flexible circuit board 1311, and a side surface of the heat dissipation member 170 departing from the first flexible circuit board 1311 protrudes from the back frame 110. The heat dissipation member 170 and the first flexible circuit board 1311 deviate from one side of the light guide plate 120 and are attached, and the heat dissipation member 170 may be a metal heat dissipation member or an organic material with good heat conduction performance and soft texture to play a buffering role, such as graphite and a graphene material. In order to better play a role of buffering and better combine the backlight module 100 and the display panel 200, the thickness of the heat dissipation member 170 is greater than that of the first flexible circuit board 1311, and the heat dissipation member 170 protrudes from the notch of the second U-shaped groove 112 of the back frame 110. In this embodiment, the heat dissipation member 170 is disposed on the first flexible circuit board 1311, so that the heat dissipation capability inside the backlight module 100 can be improved, the first flexible circuit board 1311 can be well protected and buffered, and the failure rate of the first flexible circuit board 1311 in the display device can be reduced.
In the backlight module of the present application, please refer to fig. 8, where fig. 8 is a third combined structure diagram of the backlight module 100 and the display panel 200, the backlight module 100 further includes a light-shielding adhesive 160, the light-shielding adhesive 160 is disposed on the heat dissipation member 170, and the light-shielding adhesive 160 may be made of a light-shielding adhesive tape or other opaque flexible materials. In this embodiment, as shown in fig. 8, the light shielding glue 160 may extend to the surface of the upper diffusion sheet 144 in the optical adjustment layer 140 to reduce the light leakage phenomenon between the heat dissipation member 170 and the optical adjustment layer 140.
In the backlight module of the present application, please refer to fig. 9, where fig. 9 is a fourth combined structure diagram of the backlight module 100 and the display panel 200, a side of the back frame 110 away from the light guide plate 120 is an outer side of the back frame 110, an edge-covering adhesive layer 180 is attached to the outer side of the back frame 110, and the edge-covering adhesive layer 180 extends to cover the light-shielding adhesive 160. The edge-covering glue layer 180 can be made of flexible insulating materials such as rubber materials and polyurethane materials. In this embodiment, the edge-covering adhesive layer 180 is disposed, so that the light guide plate 120 is not only adhered to the inner side of the back frame 110, but also fixed to the outer side of the back frame 110 through the edge-covering adhesive layer 180, thereby improving the stability of the combination between the light guide plate 120 and the light source assembly 130 and the back frame 110. And the edge-covering glue layer 180 can further reduce the light leakage phenomenon at the gap between the back frame 110 and the light source assembly 130, and improve the display effect.
The embodiment of the application further provides a display terminal, the display terminal comprises a terminal main body, a display panel 200 and the backlight module 100, and the terminal main body, the display panel 200 and the backlight module 100 are combined into a whole. The terminal main body may be an electronic display device such as a computer, a mobile phone, a tablet, a watch, etc., and the display panel 200 may be a liquid crystal display, an LED display, etc. The display panel 200 includes an array substrate 210 and a color filter substrate 220 attached to the array substrate 210, the array substrate 210 is a TFT substrate provided with a thin film transistor (not shown), and the color filter substrate 220 is provided with a color resistor (not shown). An upper polarizer 230 is disposed on a side of the color film substrate 220 away from the array substrate 210, a lower polarizer 240 is disposed on a side of the array substrate 210 away from the color film substrate 220, the lower polarizer 240 and the light shielding adhesive 160 are disposed on the same layer, and the light shielding adhesive 160 or the edge-covering adhesive layer 180 is attached to the array substrate 210.
The edge of the array substrate 210 is further provided with a driving chip 250, the driving chip 250 is electrically connected with a third flexible circuit board 260, and the third flexible circuit board 260 is a printed circuit board made of polyimide or polyester film and is connected with a signal input end in the display terminal.
This application sets up light source subassembly 130 into first light source area 131 and second light source area 132, makes to have two sets of light source areas in backlight unit 100, has reduced the restriction that the display terminal size arranged quantity to the luminescent device on the single light source area, sets up more luminescent devices promptly in the limited inner space of display terminal to reinforcing display terminal's display brightness. Moreover, since the first light emitting devices 1312 and the second light emitting devices 1322 are arranged in a staggered manner in the first direction X (i.e., the extending direction of the first light source strips 131 and the second light source strips 132), the distance between two adjacent light emitting devices is smaller, the number of the light emitting devices is larger, the light emitting brightness is higher, the arrangement of the light emitting devices is tighter, the light coupling in front of the lamp is better, and the problem of uneven brightness can be solved. In addition, this application has also carried out corresponding improvement (setting up first U type groove 111 or second U type groove 112) to back frame 110 structure for two light source areas, or has set up heat dissipation piece 170 on first flexible circuit board 1311 to set up shading glue 160 on heat dissipation piece 170, thereby play better guard action to two light source areas, reinforcing backlight unit 100's whole performance.
The backlight module and the display terminal provided by the embodiment of the present application are introduced in detail, and a specific example is applied to explain the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (11)
1. A backlight module is characterized by comprising a light source component and a light guide plate arranged in the light emergent direction of the light source component;
the light source assembly comprises a first light source strip and a second light source strip which are oppositely arranged, the first light source strip comprises a first flexible circuit board and a plurality of first light-emitting devices arranged on the first flexible circuit board, and the second light source strip comprises a second flexible circuit board and a plurality of second light-emitting devices arranged on the second flexible circuit board;
the first light emitting device and the second light emitting device are attached to one side of the light guide plate.
2. The backlight module as claimed in claim 1, wherein the first flexible circuit board and the second flexible circuit board are disposed at two sides of the light guide plate, and the first light emitting devices and the second light emitting devices are disposed alternately along a first direction;
wherein the first direction is an extending direction of the first light source stripe and the second light source stripe.
3. The backlight module according to claim 2, wherein the first light emitting devices and the second light emitting devices are arranged at equal intervals along the first direction;
the distance between two adjacent first light-emitting devices is equal to the distance between two adjacent second light-emitting devices;
the ratio of the spacing between the first light emitting device and the second light emitting device to the spacing between two adjacent first light emitting devices or two adjacent second light emitting devices is greater than 0.1 and less than 1.
4. The backlight module as claimed in claim 3, wherein the light guide plate comprises a light emitting surface and a reflecting surface parallel to the light emitting surface, the first flexible circuit board is connected to the light emitting surface of the light guide plate via a first adhesive material, and the second flexible circuit board is connected to the reflecting surface of the light guide plate via a second adhesive material.
5. The backlight module according to claim 4, wherein the first adhesive material comprises a plurality of first double-sided adhesive blocks, the second adhesive material comprises a plurality of second double-sided adhesive blocks, and the plurality of first double-sided adhesive blocks and the plurality of second double-sided adhesive blocks are arranged at equal intervals along the first direction;
the first end of the first double-sided adhesive block is flush with the first light-emitting device, and the second end of the first double-sided adhesive block is flush with the edge of the first flexible circuit board;
the first end of the second double-sided adhesive is flush with the second light emitting device, and the second end of the second double-sided adhesive block is flush with the edge of the second flexible circuit board.
6. The backlight module according to claim 5, wherein the first light source strips further comprise at least one first protruding end, and the second light source strips further comprise at least one second protruding end;
the first extending end and the second extending end are arranged in a staggered mode along the first direction.
7. The backlight module according to claim 6, further comprising a back frame, wherein the light guide plate and the light source assembly are disposed in the back frame;
wherein, at least one side of back of the body frame is provided with first U type groove, the opening direction orientation in first U type groove the light guide plate, the light source subassembly set up in first U type inslot, and first U type groove covers the light source subassembly.
8. The backlight module according to claim 6, further comprising a back frame, wherein the light guide plate and the light source assembly are disposed in the back frame;
the backlight module comprises a back frame, a light guide plate, a light source assembly, a back frame and a back frame, wherein a second U-shaped groove is formed in the back frame, the opening direction of the second U-shaped groove is perpendicular to the light emergent surface of the light guide plate, and the light source assembly are arranged in the second U-shaped groove.
9. The backlight module according to claim 7 or 8, further comprising an optical adjustment layer and a light-shielding glue disposed on one side of the light-emitting surface of the light guide plate, wherein the optical adjustment layer is disposed on the light-emitting surface of the light guide plate;
the shading glue extends from the edge of the backlight module to the optical adjusting layer, and the shading glue and the optical adjusting layer have an overlapping part.
10. The backlight module according to claim 9, wherein a border adhesive layer is disposed on a side of the back frame away from the light guide plate, and the border adhesive layer extends to cover the light-shielding adhesive.
11. A display terminal comprising a terminal body, a display panel and the backlight module according to any one of claims 1 to 10, wherein the terminal body, the display panel and the backlight module are combined into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110767233.4A CN113433738A (en) | 2021-07-07 | 2021-07-07 | Backlight module and display terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110767233.4A CN113433738A (en) | 2021-07-07 | 2021-07-07 | Backlight module and display terminal |
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| CN113433738A true CN113433738A (en) | 2021-09-24 |
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| CN202110767233.4A Pending CN113433738A (en) | 2021-07-07 | 2021-07-07 | Backlight module and display terminal |
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