CN112363351B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN112363351B CN112363351B CN202011329578.3A CN202011329578A CN112363351B CN 112363351 B CN112363351 B CN 112363351B CN 202011329578 A CN202011329578 A CN 202011329578A CN 112363351 B CN112363351 B CN 112363351B
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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
- 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
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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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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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
- 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
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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
- G02F1/133605—Direct backlight including specially adapted reflectors
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a backlight module and a display device, wherein the backlight module comprises a back plate, a light guide plate positioned at one side of the back plate, a first reflecting structure and a quantum diaphragm, wherein the quantum diaphragm is positioned at the light emitting side of the light guide plate, and the first reflecting structure is positioned between the light emitting side of the light guide plate and one side edge part of the quantum diaphragm; the first light conversion layer is arranged on one side of the first reflecting structure, which faces the light guide plate, and is used for converting at least part of light rays emitted from the area, corresponding to the edge part of one side of the quantum diaphragm, of the light emitting side into preset light rays, and the preset light rays are reflected back to the light guide plate through the first reflecting structure. The blue light leakage phenomenon of the display edge area of the display panel can be effectively improved, so that the display picture quality of the display panel is improved, and the user satisfaction is improved.
Description
Technical Field
The disclosure relates to the technical field of display, and in particular relates to a backlight module and a display device.
Background
Currently, with development and wide application of liquid crystal display devices, the requirement of users for color definition of the liquid crystal display devices is also increasing, which is required to increase the color gamut value of the liquid crystal display devices. As an important component in a liquid crystal display device, a backlight module generally implements high-color-gamut display of the liquid crystal display device by increasing the color gamut of a light source of the backlight module.
In order to realize high-color-gamut display of the backlight module, a combination of a blue light LED and a quantum film is generally adopted in the prior art. However, the use of the blue LED generally causes a problem of blue light leakage in the peripheral screen of the liquid crystal display device, thereby seriously affecting the quality of the screen of the liquid crystal display device and reducing the satisfaction of users.
Disclosure of Invention
The embodiment of the disclosure provides a backlight module and a display device.
In a first aspect, an embodiment of the present disclosure provides a backlight module, where the backlight module includes a back plate, a light guide plate located at one side of the back plate, a first reflection structure, and a quantum film, where the quantum film is located at a light emitting side of the light guide plate, and the first reflection structure is located between the light emitting side of the light guide plate and an edge portion of one side of the quantum film;
the first light conversion layer is arranged on one side of the first reflecting structure, which faces the light guide plate, and is used for converting at least part of light rays emitted from the area, corresponding to the edge part of one side of the quantum diaphragm, of the light emitting side into preset light rays, and the preset light rays are reflected back to the light guide plate through the first reflecting structure.
In some embodiments, the first light conversion layer overlaps with the orthographic projection of the one side edge portion of the quantum film sheet on the back plate, or the orthographic projection of the first light conversion layer covers the orthographic projection of the one side edge portion of the quantum film sheet.
In some embodiments, the quantum film sheet includes an active portion and an inactive portion disposed around the active portion, the inactive portion disposed around the active portion including first and second inactive portions disposed opposite each other, and third and fourth inactive portions disposed opposite each other; one side edge part of the quantum diaphragm is the first ineffective part;
a second light conversion layer is arranged on one side of at least one of the second ineffective part, the third ineffective part and the fourth ineffective part, which is opposite to the light guide plate;
the second light conversion layer is used for converting at least part of light rays emitted from at least one of the second invalid portion, the third invalid portion and the fourth invalid portion into the preset light rays.
In some embodiments, the second ineffective portion, the third ineffective portion, and the fourth ineffective portion are respectively provided with the second light conversion layer correspondingly.
In some embodiments, the second light conversion layer overlaps with or the orthographic projection of the corresponding inactive portion of the quantum film sheet on the back plate.
In some embodiments, one side of the back panel is a U-fold structure comprising a bottom, a first side connected to the bottom, and a top connected to the first side; the light guide plate is positioned on the bottom, the top is positioned on the light emitting side of the light guide plate and is not overlapped with the orthographic projection of the quantum film on the bottom, and the first reflecting structure is positioned on the inner side of the top facing the light guide plate.
In some embodiments, the backlight module further includes a light source, the light source is located above the bottom and located on a light incident side of the light guide plate, and the light incident side is a side of the light guide plate facing the first side.
In some embodiments, the light source is a blue light source.
In some embodiments, the first light conversion layer is a first yellow fluorescent layer, and the preset light is white light.
In some embodiments, in a case where a second light conversion layer is further provided, the second light conversion layer is a second yellow fluorescent layer, and the preset light is white light.
In a second aspect, an embodiment of the present disclosure provides a display device, where the display device includes a display panel and the backlight module provided in any one of the embodiments, and the display panel is located on a light emitting side of the backlight module.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure;
FIG. 2 is a top view of a quantum diaphragm in an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of the quantum film sheet and first light conversion layer of FIG. 1;
fig. 4 is a schematic structural diagram of another backlight module according to an embodiment of the disclosure;
FIG. 5 is a schematic view of a masking tape of FIG. 4;
fig. 6 is a schematic top view of a second light conversion layer according to an embodiment of the disclosure.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the technical solutions of the backlight module and the display device provided by the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure.
Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but may be embodied in various 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 scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements/structures, these elements/structures should not be limited by these terms. These terms are only used to distinguish one element/structure from another element/structure.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure.
As shown in fig. 1, the embodiment of the disclosure provides a backlight module, which includes a back plate 1, a light guide plate 2 located at one side of the back plate 1, a first reflection structure 3, and a quantum film 4, where the quantum film 4 is located at a light emitting side 20 of the light guide plate 2, and the first reflection structure 3 is located between the light emitting side 20 of the light guide plate 2 and a side edge portion 41 of the quantum film 4.
The first light conversion layer 5 is disposed on a side of the first reflective structure 3 facing the light guide plate 2, and the first light conversion layer 5 is configured to convert at least part of light emitted from the light emitting side 20 corresponding to the area of the edge portion 41 of the quantum film 4 into preset light, and reflect the preset light back to the light guide plate 2 through the first reflective structure 3.
In the embodiment of the disclosure, the backlight module is a high-color-gamut backlight module, the light emitted from the light guide plate 2 is blue light, one side edge portion 41 of the quantum film 4 is an ineffective portion of the quantum film 4, and the first light conversion layer 5 is disposed on one side of the light guide plate 2, facing the light guide plate 2, of the first reflective structure 3 between the light emitting side 20 of the light guide plate 2 and the one side edge portion 41 of the quantum film 4, and the first light conversion layer 5 can convert at least part of the light (blue light) emitted from the area of the light emitting side 20 corresponding to the one side edge portion 41 of the quantum film 4 into preset light (white light), and reflect the preset light back to the light guide plate 2 through the first reflective structure 3, and the preset light is emitted from the area corresponding to the one side edge portion 41 of the quantum film 4 after being processed by the light guide plate 2, thereby effectively improving the blue light leakage phenomenon of the area, thereby effectively improving the blue light leakage phenomenon of the display area AA of the display area of the display panel 6, and improving the display picture quality of the display panel 6 and user satisfaction.
In some embodiments, the first light conversion layer 5 is a first yellow fluorescent layer, which may be made of yellow fluorescent powder or yellow fluorescent ink, and may be formed on the lower surface of the first reflective structure 3 by printing. Blue light emitted from the light emitting side of the light guide plate 2 can react with the yellow fluorescent layer to be converted into white light to be emitted.
In some embodiments, as shown in fig. 1, the first light conversion layer 5 overlaps with the orthographic projection portion of the one side edge portion 41 of the quantum film 4 on the back plate 1, so that a portion of the light emitted from the light emitting side 20 toward the one side edge portion 41 of the quantum film 4 can be converted into a preset light. In some embodiments, the orthographic projection of the first light conversion layer 5 on the back plate 1 covers the orthographic projection of the one side edge portion 41 of the quantum film 4 on the back plate 1, so that the light emitted from the light emitting side 20 and directed to the one side edge portion 41 of the quantum film 4 can be converted into the preset light, and the preset light is white light.
In the embodiment of the disclosure, as shown in fig. 1, the light emitting side of the light guide plate 2 is a side of the light guide plate 2 facing away from the back plate 1, and the light guide plate 2 further includes a light entering side 21 adjacent to the light emitting side 20. In the embodiment of the present disclosure, the display panel 6 includes an effective display area AA and a non-display area BB disposed around the effective display area AA. The light guide plate 2 includes a central area AA corresponding to the effective display area AA and an edge area corresponding to the non-display area BB, and the edge area near the light incident side 21 of the light guide plate 2 is a first edge area BB, where the first reflection structure 3, the one side edge portion 41 of the quantum film 4, and the first light conversion layer 5 are located.
In this embodiment of the disclosure, as shown in fig. 1, the back panel 1 includes a bottom 11 and side portions located around the bottom 11, the side portions located around the bottom 11 include a first side portion 12, a second side portion (not shown in the drawing) disposed opposite to the first side portion 12, a third side portion (not shown in the drawing) and a fourth side portion (not shown in the drawing) disposed opposite to the third side portion, where one side of the back panel 1 is a U-folded structure, the U-folded structure includes a bottom 11, a first side portion 12 connected to the bottom 11, and a top portion 13 connected to the first side portion 12, the first side portion 12 and the bottom 11 may be vertically disposed, the top portion 13 and the first side portion 12 may be vertically disposed, the light incident side 21 of the light guide plate 2 is disposed opposite to the first side portion of the back panel 1, the first side portion 5 is wrapped around the outside of the first edge area BB, and the top portion 13 can be used to support the display panel 6. The fixing tape 7 is disposed between the outer side of the top 13 facing the non-display area BB of the display panel 6 and the display panel 6, the fixing tape 7 may be a double-sided tape, and the top 13 and the display panel 6 may be fixed by the fixing tape 7.
Specifically, as shown in fig. 1, the light guide plate 2 is located above the bottom 11, the top 13 is located on the light emitting side 20 of the light guide plate 2, and the top 13 and the orthographic projection of the quantum film 4 on the bottom 11 are not overlapped, and the first reflective structure 3 is located on the inner side of the top 13 facing the light guide plate 2.
In the embodiment of the disclosure, as shown in fig. 1, the backlight module further includes a light source, the light source is located above the bottom 11, and the light source is located on the light incident side 21 of the light guide plate 2, and the light source is configured to emit light to the light incident side 21 of the light guide plate 2. Specifically, the light source is a blue light source, the light source includes an LED light bar, the LED light bar includes an LED lamp 81 and a flexible circuit board 82 located between the LED lamp 81 and the bottom 11, and an edge portion of the flexible circuit board 82 extends between the light guide plate 2 and the bottom 11, the LED lamp 81 is a blue LED lamp, wherein the flexible circuit board 82 may include a reflective layer (not shown in the figure) toward an upper surface of the LED lamp 81, for reflecting light emitted from the LED lamp 81, thereby improving light utilization.
In the embodiment of the disclosure, as shown in fig. 1, a second reflective structure 9 is further disposed between the light guide plate 2 and the bottom 11 of the back plate 1, the second reflective structure 9 and the flexible circuit board 82 may be disposed on the same plane, and an upper surface of the second reflective structure 89 facing the light guide plate 2 may be flush with an upper surface of the flexible circuit board 82 facing the light guide plate 2. The second reflecting structure 9 can reflect the light emitted from the bottom surface of the light guide plate 2 opposite to the light emitting side back to the light guide plate 2, thereby effectively improving the light utilization rate and the backlight brightness.
In the embodiment of the present disclosure, the second reflective structure 9 and the flexible circuit board 82 may be fixed to the bottom 11 of the back plate 1 by a fixing tape (not shown in the drawings), which may be located on a side of the second reflective structure 9 and the flexible circuit board 82 facing the bottom 11 of the back plate 1, wherein the fixing tape may be a double-sided tape.
In the embodiment of the disclosure, the first reflecting structure 3 can be used for reflecting the light emitted by the LED light bar, and can also be used for reflecting the light emitted from the area of the light guide plate 2 corresponding to the first reflecting structure 3, so that the light utilization rate is effectively improved. In some embodiments, the first reflective structure 3, the second reflective structure 9 may each be a reflective tape.
In the embodiment of the disclosure, the light guide plate 2 is provided with a plurality of dots 22, and the dots 22 are located at the inner side of the bottom of the light guide plate 2 and are used for scattering the light incident from the light incident side 21, so as to improve the uniformity of light transmission in the light guide plate 2. The light rays (including the preset light rays) reflected from the first reflecting structure 3 back into the light guide plate 2 can be emitted from the light emitting side 20 after being reflected again by the dots 22 and the second reflecting structure 9.
In the embodiment of the disclosure, as shown in fig. 1, the backlight module further includes an optical film 10, the optical film 10 is located on a side of the quantum film 4 facing away from the light guide plate 2, and the optical film 10 is located between the display panel 6 and the quantum film 4.
Fig. 2 is a top view of a quantum film according to an embodiment of the present disclosure, where in the embodiment of the present disclosure, as shown in fig. 1 and 2, a quantum film 4 includes an effective portion 42 and an ineffective portion disposed around the effective portion 42, the effective portion 42 is an effective area of the quantum film 4, the ineffective portion is an ineffective area of the quantum film 4, light passing through the effective area reacts with a material of the quantum film 4 and then is transmitted to a display area AA of a display panel 6, and light passing through the ineffective area does not react and directly exits from the ineffective area.
As shown in fig. 1 and 2, the ineffective portions provided around the effective portion 42 include a first ineffective portion 41 and a second ineffective portion 43 provided opposite to each other, and a third ineffective portion 44 and a fourth ineffective portion 45 provided opposite to each other; the one side edge portion 41 of the quantum film sheet 4 is a first ineffective portion 41. Wherein the effective portion 42 of the quantum film sheet 4 is disposed corresponding to the display area AA of the display panel 6, and the ineffective portion disposed around the effective portion 42 is disposed corresponding to the non-display area BB of the display panel 6.
Fig. 3 is a schematic cross-sectional view of the quantum film sheet and the first light conversion layer in fig. 1 to 3, and in some embodiments, the width d of the first ineffective portion 41 ranges from 0.5 mm to 1 mm, the width of the second ineffective portion 43 ranges from 0.5 mm to 1 mm, the width of the third ineffective portion 44 ranges from 0.5 mm to 1 mm, and the width d of the fourth ineffective portion 45 ranges from 0.5 mm to 1 mm.
In some embodiments, the width D of the first light conversion layer 5 may be set to 5.33 millimeters. In some embodiments, the second light conversion layer 104 may also be printed on the entire lower surface of the first reflective structure 3.
Fig. 4 is a schematic structural diagram of another backlight module according to an embodiment of the disclosure, as shown in fig. 2 and 4, in some embodiments, a second light conversion layer 104 is disposed on a side of at least one of the second ineffective portion 43, the third ineffective portion 44, and the fourth ineffective portion 45 of the quantum film 4, which is away from the light guide plate 2. The second light conversion layer 104 is configured to convert at least part of light emitted from at least one of the second ineffective portion 43, the third ineffective portion 44, and the fourth ineffective portion 45 into preset light. Thereby effectively improving blue light leakage in the region where at least one of the second, third and fourth ineffective portions 43, 44 and 45 is located.
In some embodiments, the second light conversion layer 104 overlaps with the orthographic projection portion of the corresponding inactive portion (e.g., the second inactive portion 43) of the quantum film sheet 4 on the back plate 1. In some embodiments, the orthographic projection of the second light conversion layer 104 covers the orthographic projection of the corresponding inactive portion (e.g., the second inactive portion 43) of the quantum film sheet 4.
In some embodiments, as shown in fig. 4, the backlight module further includes a glue frame 101, where the glue frame 101 is located above the bottom 11 of the back plate 1, is located between the second ineffective portion 43, the third ineffective portion 44, the fourth ineffective portion of the quantum film 4 and the bottom 11 of the back plate 1, and the glue frame 101 is located on the non-light-incident side of the light guide plate 2 adjacent to the light-emitting side 20, and the glue frame 101 may be disposed around the non-light-incident side of the light guide plate 2 adjacent to the light-emitting side 20. A fixing adhesive tape 102 is further disposed between the adhesive frame 101 and the bottom 11 of the back plate 1, the adhesive frame 101 is fixed on the bottom 11 through the fixing adhesive tape 102, a gap exists between the adhesive frame 101 and the light guide plate 2, and the top surface of the adhesive frame 101 is attached to the lower surface of the quantum film 4.
In some embodiments, the light emitted from the non-light-incident side of the light guide plate 2 enters the glue frame 101, at least part of the light can be reflected in the glue frame 101, and the light is emitted from the top surface of the glue frame 101 to the second inactive portion 43, the third inactive portion 44, and the fourth inactive portion of the quantum film sheet 4. And since the second light conversion layer 104 is disposed on the side of at least one of the second, third and fourth ineffective portions 43, 44 and 45 of the quantum film 4 facing away from the light guide plate 2, the second light conversion layer 104 is capable of converting at least part of the light emitted from at least one of the second, third and fourth ineffective portions 43, 44 and 45 into the preset light. Thereby effectively improving blue light leakage in the region where at least one of the second, third and fourth ineffective portions 43, 44 and 45 is located.
Fig. 4 illustrates only a case where the second light conversion layer 104 is disposed above the second ineffective portion 43 of the quantum film sheet 4, and the non-light incident side of the light guide plate 2 adjacent to the light emitting side 20 illustrated in fig. 4 is the non-light incident side disposed opposite to the light incident side 21, in which case, as illustrated in fig. 4, the second side 14 disposed opposite to the first side 12 of the back plate 1 is located outside the glue frame 101, and the second side 14 is disposed perpendicular to the bottom 11.
In some embodiments, as shown in fig. 4, the backlight module further includes a light shielding tape 103, where the light shielding tape 103 is located in the non-display area BB and between the optical film 10 and the display panel 6, and the light shielding tape 103 may be disposed around the non-display area BB of the display panel 6. The side portion (e.g., the second side portion 14) of the back plate 1 and a portion of the upper surface of the optical film 10 may be fixed to the display panel 6 by the light shielding tape 103, and specifically, the light shielding tape 103 may be adhered to the lower surface of the non-display area BB of the display panel 6 and adhered to the side portion of the back plate 1 and a portion of the upper surface of the optical film 10.
In some embodiments, as shown in fig. 4, the second light conversion layer 104 may be located between a portion of the upper surface of the optical film 10 and the light shielding tape 103, and the orthographic projection of the second light conversion layer 104 on the bottom 11 covers the orthographic projection of the second ineffective portion 43 on the bottom 11.
Fig. 5 is a schematic structural diagram of a light shielding tape in fig. 4, and as shown in fig. 5, in some embodiments, the second light conversion layer 104 may be a part of the light shielding tape 103, and is located in the light shielding tape 103. Specifically, the light shielding tape 103 includes a first tape layer 1031, a second light conversion layer 104, and a second tape layer 1032 that are sequentially disposed, wherein the first tape layer 1031 is located between the optical film and the second light conversion layer 104, the second tape layer 1032 is located between the second light conversion layer 104 and the display panel 6, a side of the second light conversion layer 104 near the display area AA protrudes with respect to the first tape layer 1031, a width of the second light conversion layer 104 is greater than the first tape layer 1031, and a width of the second light conversion layer 104 is equal to a width of the second tape layer 1032. The first adhesive tape layer 1031 may be a black double-sided adhesive tape or a transparent double-sided adhesive tape, and the second adhesive tape layer 1031 may be a black double-sided adhesive tape.
In some embodiments, regarding the case where the second light conversion layer 104 is disposed over the third and fourth ineffective portions 44 and 45, description of the case where the second light conversion layer 104 is disposed over the second ineffective portion 43 in fig. 4 may be made, and will not be repeated here.
Fig. 6 is a schematic top view of a second light conversion layer in an embodiment of the disclosure, in some embodiments, as shown in fig. 2, 4 and 6, the second ineffective portion 43, the third ineffective portion 44 and the fourth ineffective portion 45 are respectively provided with a second light conversion layer 104 correspondingly, as shown in fig. 6, the second light conversion layer 104 is disposed around a lower surface of the light shielding tape 103, and fig. 4 exemplarily shows a cross-sectional structure of the light shielding tape 103 and the second light conversion layer 104 in the CC' direction shown in fig. 6.
In some embodiments, the width of the second light conversion layer 104 may be set to 5.33 millimeters. In some embodiments, the second light conversion layer 104 may also be printed on the entire lower surface of the light shielding tape 103.
In some embodiments, the second light conversion layer 5 is a second yellow fluorescent layer, which may be made of yellow fluorescent powder or yellow fluorescent ink, and may be formed on the lower surface of the light shielding tape 103 by printing.
In some embodiments, each inactive portion of the quantum film 4 is provided with a light conversion layer, so that at least part of the blue light emitted from the effective light emitting side can be absorbed by the light conversion layer and converted into white light, thereby reducing light loss and improving the light emitting brightness of the module, and effectively preventing the blue light from leaking out of the inactive area of the quantum film 4, effectively improving the blue light leakage phenomenon of the inactive area of the quantum film 4, and further effectively improving the blue light leakage phenomenon of the edge of the display area AA of the display panel 6, improving the display picture quality of the display panel 6, and improving the satisfaction of users.
The embodiment of the disclosure further provides a display device, which includes a display panel and the backlight module provided in any of the foregoing embodiments, where the display panel is located at a light emitting side of the backlight module, and the specific description of the display panel and the backlight module can be referred to the description of any of the foregoing embodiments, and will not be repeated herein.
The display device can be any product or component with display function, such as a television, a display, a digital photo frame, a mobile phone, a tablet personal computer and the like.
It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.
Claims (10)
1. The backlight module is characterized by comprising a back plate, a light guide plate, a first reflecting structure, a quantum diaphragm and an optical diaphragm, wherein the light guide plate is positioned at one side of the back plate;
a first light conversion layer is arranged on one side of the first reflecting structure, facing the light guide plate, and is used for converting at least part of light rays emitted from the area, corresponding to the edge part of one side of the quantum diaphragm, of the light emitting side into preset light rays, and reflecting the preset light rays back to the light guide plate through the first reflecting structure;
the quantum diaphragm comprises an effective part and an ineffective part arranged around the effective part, wherein the ineffective part arranged around the effective part comprises a first ineffective part and a second ineffective part which are oppositely arranged, and a third ineffective part and a fourth ineffective part which are oppositely arranged; one side edge part of the quantum diaphragm is the first ineffective part;
a second light conversion layer is arranged on one side of at least one of the second ineffective part, the third ineffective part and the fourth ineffective part, which is opposite to the light guide plate;
the second light conversion layer is used for converting at least part of light rays emitted from at least one of the second invalid portion, the third invalid portion and the fourth invalid portion into the preset light rays;
the backlight module further comprises a shading adhesive tape, wherein the shading adhesive tape is correspondingly positioned in a non-display area of the display panel and positioned between the optical film and the display panel, and the upper surface of the edge part of the optical film is fixed with the display panel through the shading adhesive tape;
the shading tape comprises a first tape layer, a second light conversion layer and a second tape layer which are sequentially arranged, wherein the first tape layer is positioned between the optical film and the second light conversion layer, the second tape layer is positioned between the second light conversion layer and the display panel, one side, close to a display area of the display panel, of the second light conversion layer protrudes relative to the first tape layer, the width of the second light conversion layer is larger than that of the first tape layer, and the width of the second light conversion layer is equal to that of the second tape layer;
the backlight module further comprises a glue frame, the glue frame is located between the second invalid portion, the third invalid portion and the fourth invalid portion of the quantum diaphragm and the back plate, the glue frame is located on the non-light-in side adjacent to the light-out side of the light guide plate and is arranged around the non-light-in side of the light guide plate, a gap exists between the glue frame and the light guide plate, and the top surface of the glue frame is attached to the lower surface of the quantum diaphragm.
2. The backlight module according to claim 1, wherein the first light conversion layer overlaps with an orthographic projection of a side edge portion of the quantum film on the back plate, or the orthographic projection of the first light conversion layer covers an orthographic projection of a side edge portion of the quantum film.
3. A backlight module according to claim 1, wherein the second ineffective portion, the third ineffective portion and the fourth ineffective portion are respectively provided with the second light conversion layer correspondingly.
4. A backlight module according to claim 3, wherein the second light conversion layer overlaps with the orthographic projection of the corresponding inactive portion of the quantum film sheet on the back plate, or the orthographic projection of the second light conversion layer covers the orthographic projection of the corresponding inactive portion of the quantum film sheet.
5. A backlight module according to any one of claims 1-4, wherein one side of the back plate is a U-fold structure comprising a bottom, a first side connected to the bottom, and a top connected to the first side; the light guide plate is positioned on the bottom, the top is positioned on the light emitting side of the light guide plate and is not overlapped with the orthographic projection of the quantum film on the bottom, and the first reflecting structure is positioned on the inner side of the top facing the light guide plate.
6. A backlight module according to claim 5, further comprising a light source located above the bottom and on a light entrance side of the light guide plate, the light entrance side being a side of the light guide plate facing the first side.
7. A backlight module according to claim 6, wherein the light source is a blue light source.
8. The backlight module according to claim 7, wherein the first light conversion layer is a first yellow fluorescent layer, and the predetermined light is white light.
9. A backlight module according to claim 7, wherein in case a second light conversion layer is further provided, the second light conversion layer is a second yellow fluorescent layer, and the predetermined light is white light.
10. A display device comprising a display panel and the backlight module of any one of claims 1-9, the display panel being located on a light exit side of the backlight module.
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| CN202011329578.3A CN112363351B (en) | 2020-11-24 | 2020-11-24 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011329578.3A CN112363351B (en) | 2020-11-24 | 2020-11-24 | Backlight module and display device |
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| CN112363351A CN112363351A (en) | 2021-02-12 |
| CN112363351B true CN112363351B (en) | 2023-06-20 |
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| CN114333561B (en) * | 2022-01-30 | 2022-09-20 | 深圳市瀚达美电子有限公司 | Quantum dot LED lamp strip suitable for high-color-gamut backlight module and backlight module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012208307A (en) * | 2011-03-29 | 2012-10-25 | Dainippon Printing Co Ltd | Transmission type display device |
| KR101851726B1 (en) * | 2011-11-23 | 2018-04-24 | 엘지이노텍 주식회사 | Display device |
| JP6217187B2 (en) * | 2013-07-03 | 2017-10-25 | ソニー株式会社 | Light emitting device and display device |
| CN105090808B (en) * | 2014-05-13 | 2017-08-29 | 扬升照明股份有限公司 | Backlight module |
| CN105402640B (en) * | 2014-09-15 | 2018-04-24 | 扬升照明股份有限公司 | Backlight module |
| CN107203064A (en) * | 2017-07-03 | 2017-09-26 | 厦门天马微电子有限公司 | A kind of display device |
| CN110646981A (en) * | 2019-09-30 | 2020-01-03 | 厦门天马微电子有限公司 | Display device |
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