CN117346086A - Lamp panel, manufacturing method thereof, backlight source and display device - Google Patents
Lamp panel, manufacturing method thereof, backlight source and display device Download PDFInfo
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- CN117346086A CN117346086A CN202311411993.7A CN202311411993A CN117346086A CN 117346086 A CN117346086 A CN 117346086A CN 202311411993 A CN202311411993 A CN 202311411993A CN 117346086 A CN117346086 A CN 117346086A
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- circuit board
- light reflecting
- lamp panel
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/90—Methods of manufacture
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Planar Illumination Modules (AREA)
Abstract
The disclosure provides a lamp panel, a manufacturing method thereof, a backlight source and a display device, and belongs to the technical field of display. Wherein, the lamp plate includes: a circuit board; a plurality of light emitting units arranged in an array on the circuit board; the light reflecting structure comprises a supporting structure and a light reflecting layer covering the supporting structure, wherein the ratio between the height of the light reflecting structure in a first direction and the maximum width of the light reflecting structure in a second direction is larger than 0.5, the reflectivity of the light reflecting layer is larger than 90%, the first direction is perpendicular to the circuit board, and the second direction is parallel to the circuit board. The method and the device can reduce halation of emergent light spots of the light-emitting unit, are favorable for carrying out algorithm processing by adopting a Local Dimming technology in the later period, can improve the contrast of images, and improve the display effect of the images.
Description
Technical Field
The disclosure relates to the technical field of display, in particular to a lamp panel, a manufacturing method thereof, a backlight source and a display device.
Background
In the direct type backlight module, blue light mini LED (Lighting Emitting Diode, light emitting diode) chips distributed in an array mode are used as a backlight source, and red and green quantum dot film materials are excited to generate white light. In order to improve the dynamic contrast of the image, the Local Dimming technology can be used for realizing the Local lighting of the backlight module, and simultaneously, the HDR (High Dynamic Range, high dynamic range image) technology is matched, so that the power consumption of the display device is reduced, and meanwhile, a good display effect can be obtained.
In the related art, the flare of the light spot emitted by the LED is larger, so that the regional dimming effect is poor, and the contrast of the image is further influenced.
Disclosure of Invention
The technical problem to be solved by the disclosure is to provide a lamp panel, a manufacturing method thereof, a backlight source and a display device, which can reduce halation of emergent light spots of a light-emitting unit, are beneficial to carrying out algorithm processing by adopting a Local Dimming technology in the later period, can improve contrast of images and improve display effects of the images.
In order to solve the above technical problems, the embodiments of the present disclosure provide the following technical solutions:
in one aspect, a lamp panel is provided, comprising:
a circuit board;
a plurality of light emitting units arranged in an array on the circuit board;
the light reflecting structure comprises a supporting structure and a light reflecting layer covering the supporting structure, wherein the ratio between the height of the light reflecting structure in a first direction and the maximum width of the light reflecting structure in a second direction is larger than 0.5, the reflectivity of the light reflecting layer is larger than 90%, the first direction is perpendicular to the circuit board, and the second direction is parallel to the circuit board.
In some embodiments, further comprising:
the first dimming structure is positioned on the light emitting side of the circuit board and fills the gap between the light emitting unit and the light reflecting structure, the first dimming structure comprises a first refractive index layer and a second refractive index layer which are arranged in a laminated mode, the first refractive index layer is positioned on one side, far away from the circuit board, of the second refractive index layer, and the refractive index of the first refractive index layer is smaller than that of the second refractive index layer.
In some embodiments, the first refractive index layer has a refractive index less than or equal to 1.3 and the second refractive index layer has a refractive index greater than or equal to 2.
In some embodiments, further comprising:
the second dimming structure is positioned on the light emitting side of the circuit board and comprises first refractive index units and second refractive index units which are alternately arranged in a second direction, and the refractive index of the first refractive index units is smaller than that of the second refractive index units.
In some embodiments, the first refractive index element has a refractive index less than or equal to 1.3 and the second refractive index element has a refractive index greater than or equal to 2.
In some embodiments, the width of the second refractive index elements in the second direction is greater than the width of the first refractive index elements in the second direction.
In some embodiments, the second dimming structure is located on a side of the first dimming structure remote from the circuit board.
In some embodiments, the side surface of the support structure is a stepped structure.
Embodiments of the present disclosure also provide a backlight including a lamp panel as described above.
Embodiments of the present disclosure also provide a display device including a backlight as described above.
The embodiment of the disclosure also provides a manufacturing method of the lamp panel, which comprises the following steps:
providing a circuit board;
forming a plurality of light emitting units arranged in an array on the circuit board;
and forming a light reflecting structure between adjacent light emitting units, wherein the light reflecting structure comprises a supporting structure and a light reflecting layer covering the supporting structure, the ratio between the height of the light reflecting structure in a first direction and the maximum width of the light reflecting structure in a second direction is larger than 0.5, the reflectivity of the light reflecting layer is larger than 90%, the first direction is perpendicular to the circuit board, and the second direction is parallel to the circuit board.
In some embodiments, the method further comprises:
and forming a first dimming structure for filling a gap between the light emitting unit and the light reflecting structure on the light emitting side of the circuit board, wherein the first dimming structure comprises a first refractive index layer and a second refractive index layer which are stacked, the first refractive index layer is positioned on one side, far away from the circuit board, of the second refractive index layer, and the refractive index of the first refractive index layer is smaller than that of the second refractive index layer.
In some embodiments, the method further comprises:
and forming a second dimming structure on the light emitting side of the circuit board, wherein the second dimming structure comprises first refractive index units and second refractive index units which are alternately arranged in a second direction, and the refractive index of the first refractive index units is smaller than that of the second refractive index units.
In some embodiments, forming the second dimming structure comprises:
and forming the second dimming structure on one side of the first dimming structure away from the circuit board.
In some embodiments, forming the support structure comprises:
forming a columnar transition support structure;
and etching the side surface of the transition support structure to form the support structure with the side surface of the step-shaped structure.
The embodiment of the disclosure has the following beneficial effects:
in the scheme, the reflective structure is arranged between the adjacent light-emitting units of the lamp panel and consists of the supporting structure and the reflective layer, the height-width ratio of the reflective structure is more than 0.5, when the light-emitting units emit light, the reflective structure can effectively block and reflect light emitted by the light-emitting units, and prevent the light emitted by the light-emitting units from diffusing to other areas, so that halation of emergent light spots of the light-emitting units is reduced, later algorithm processing is facilitated, the contrast ratio of images can be improved, and the display effect of the images is improved.
Drawings
FIG. 1 is a schematic diagram of a related art lamp panel;
FIG. 2 is a schematic diagram of key parameters of white glue;
FIG. 3 is a schematic diagram of light modulation by white glue of different heights;
fig. 4 and 5 are schematic diagrams showing light distribution of a related art lamp panel when a light emitting unit is turned on;
FIG. 6 is a schematic diagram showing the brightness distribution of a related art lamp panel;
FIG. 7 is a schematic diagram of a lamp panel according to an embodiment of the disclosure;
FIG. 8 is a schematic view of a lamp panel according to another embodiment of the disclosure;
FIG. 9 is a schematic diagram of a light reflecting layer reflecting a plurality of light beams with different angles emitted from a light emitting unit according to an embodiment of the disclosure;
fig. 10 is a schematic structural diagram of a second dimming structure according to an embodiment of the present disclosure;
FIG. 11 is a schematic diagram of modulating light according to an embodiment of the present disclosure;
fig. 12 is a schematic diagram illustrating a light distribution of a lamp panel when a light emitting unit is turned on according to an embodiment of the disclosure.
Reference numerals
01. Circuit board
02. White ink
03. Light-emitting unit
04. Optical adhesive layer
05. Supporting structure
06. Reflective layer
07. First refractive index layer
08. Second light modulation structure
09. Second refractive index layer
081. First refractive index unit
082. Second refractive index unit
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present disclosure more apparent, the following detailed description will be given with reference to the accompanying drawings and the specific embodiments.
Fig. 1 is a schematic structural diagram of a related art LED lamp panel, as shown in fig. 1, where the lamp panel includes a circuit board 01, and a plurality of light emitting units 03 arranged in an array on the circuit board 01, where the light emitting units 03 may be LEDs; there is a gap between the light emitting units 03, and in order to improve the light emitting efficiency of the lamp panel, the lamp panel further includes white ink 02 located at the gap between the adjacent light emitting units 03, and an optical adhesive layer 04 located at the light emitting side of the light emitting units 03. The white ink 02 can reflect part of the light emitted from the light emitting unit 03, so that the light emitting efficiency of the lamp panel can be improved, and the white ink 02 is generally formed by a spot coating method, and the height of the white ink 02 is limited due to the material characteristics of the white ink 02 and the limitation of the spot coating process. As shown in fig. 2, the morphology key parameters of the white ink 02 include a width a and a height B, and the higher the height B of the white ink 02 is, the better the light receiving effect is; as shown in fig. 3, for two light reflecting structures with the height of D2 and D1 (D2 is larger than D1), when the same beam of light irradiates the light reflecting structure with the height of D2, the light reflecting structure with the height of D2 can perform folding modulation on the light; however, since D1 is relatively small, the light reflection structure with the height of D1 cannot collect and modulate light. Because the structural strength of the white ink 02 is relatively low, the highest aspect ratio (B/A) of the white ink 02 can only achieve about 35%, namely, the width of 0.5mm, the height of about 0.175mm, if the height of the white ink 02 is to be increased, for example, the height of the white ink 02 is increased to 0.3mm, the width of the white ink 02 is about 1mm, however, because the space between the light-emitting units 03 is limited, the white ink 02 with the overlarge width cannot be accommodated, the value of B/A cannot be increased, the flare of light emitted by the light-emitting units of the lamp panel is larger, the corresponding point spread function curve is wider, the control range of the corresponding area is exceeded, and the Local Dimming algorithm and the data transmission capability are exceeded, so that the display effect is poor.
Fig. 4 shows a V-direction luminance distribution diagram of a related art lamp panel when one light emitting unit is turned on, wherein the abscissa is the relative position coordinate of the turned-on light emitting unit on the lamp panel, and the ordinate is the relative luminance; fig. 5 shows an H-direction luminance distribution diagram of a light panel when one light emitting unit is turned on, wherein the abscissa is the relative position coordinate of the turned-on light emitting unit on the light panel, and the ordinate is the relative luminance. As shown in fig. 6, taking lighting of a light emitting unit in the middle of a lamp panel as an example, the total reflection angle from the optical adhesive layer 04 to air is 40.5 °, S1 is the light ray distribution range of entering the optical adhesive layer 04 through the light emitting unit, the corresponding light ray angle range of S1 is ±40.5°, S2 is the light ray distribution range of greater than the total reflection angle, and after the total reflection occurs at the interface between the air and the optical adhesive layer 04, the air enters again after being reflected by the white ink 02; it can be seen that the S1 is distributed in the whole area of the lamp panel, so that when one light emitting unit in the center of the lamp panel is lighted, a halo is obviously visible, a circular light spot can cover the whole lamp panel, and the light scattering seriously affects the processing of a Local Dimming algorithm in the later stage of a display image.
The embodiment of the disclosure provides a lamp panel, a manufacturing method thereof, a backlight source and a display device, which can reduce halation of emergent light spots of a light-emitting unit, are beneficial to carrying out algorithm processing by adopting a Local Dimming technology in the later period, can improve contrast of images and improve display effects of the images.
Embodiments of the present disclosure provide a lamp panel, comprising:
a circuit board 01;
a plurality of light emitting units 03 arranged in an array on the circuit board 01;
the light reflecting structure is positioned between the adjacent light emitting units 03 and comprises a supporting structure 05 and a light reflecting layer 06 covering the supporting structure 05, the ratio between the height of the light reflecting structure in a first direction and the maximum width of the light reflecting structure in a second direction is larger than 0.5, the reflectivity of the light reflecting layer 06 is larger than 90%, the first direction is perpendicular to the circuit board, and the second direction is parallel to the circuit board.
In this embodiment, be provided with the reflection of light structure between the adjacent luminescence unit of lamp plate, the reflection of light structure comprises bearing structure and reflector layer, the aspect ratio of reflection of light structure is more than 0.5, when luminescence unit is luminous, the reflection of light structure can block and reflect the light that luminescence unit sent effectively, avoid the light diffusion that luminescence unit sent to other regions, thereby reduce the halation of luminescence unit outgoing facula, be favorable to adopting Local diming technique to carry out arithmetic processing in the later stage, can improve the contrast of image, improve the display effect of image.
Unlike the related art that the reflective structure is made of white ink, in this embodiment, the supporting structure 05 may be made of materials with a certain structural strength, such as acrylic, quartz, etc., and the supporting structure 05 may be coated with white ink as the reflective layer 06, where the supporting structure 05 has a certain structural strength, and is not limited by an aspect ratio bottleneck brought by a spot coating process, the height of the reflective structure may be increased, so that the aspect ratio (the ratio between the height in the first direction and the maximum width in the second direction) of the reflective structure is above 0.5, for example, the aspect ratio of the reflective structure may be 0.6, 0.7, 0.8, 0.9, 1, 2 or 3, so that the reflective structure has a larger height under the condition of a smaller occupied area, and the reflective structure with a larger height may effectively block and reflect light emitted by the light emitting unit 03, so as to avoid the light emitted by the light emitting unit 03 from diffusing to other areas, thereby reducing halation of the light spots emitted by the light emitting unit, facilitating the later arithmetic processing by adopting the Local Dimming technology, and improving the image display effect.
In addition, in this embodiment, only one layer of white ink needs to be coated as the reflective layer, and the whole reflective structure does not need to be manufactured by using the white ink, so that the usage amount of the white ink can be reduced, and the manufacturing cost of the lamp panel is further reduced.
In this embodiment, the supporting structure 05 is a columnar structure, and may be in various shapes such as a cylinder, a cuboid, a cone, a hemisphere, a semi-ellipsoid, etc.; as shown in fig. 7, the side surface of the support structure 05 may be a stepped structure; as shown in fig. 8, the support structure 05 may also be a rectangular parallelepiped structure.
When the side surface of the supporting structure 05 is of a step-shaped structure, slopes of different areas of the surface of the reflecting layer 06 are different, so as shown in fig. 9, a plurality of light rays with different angles emitted from the light-emitting unit 03 are incident on the surface of the reflecting layer 06 and can be reflected to converge towards the vertical direction, the effect of enhancing the front light-emitting effect of the lamp panel is achieved, the light-emitting efficiency of the lamp panel is improved, and the backlight brightness is enhanced. In this embodiment, the step-like structure of each side surface may include 3, 4, 5, or 6 step surfaces, and the widths and heights of the different step surfaces may be the same or different; the width and the height of the step surface can be adjusted according to the requirement, so that the reflecting structure can reflect light rays with various angles.
When the side surface of the support structure 05 is a stepped structure, forming the support structure includes:
forming a columnar transition support structure, such as forming a cuboid transition support structure or a cylindrical transition support structure;
and etching the side surface of the transition support structure to form the support structure with the side surface of the step-shaped structure, and specifically, etching the side surface of the transition support structure by adopting dry etching.
In some embodiments, as shown in fig. 7 and 8, the light panel further includes:
the first dimming structure is located at the light emitting side of the circuit board 01, fills the gap between the light emitting unit 03 and the light reflecting structure, the first dimming structure comprises a first refractive index layer 07 and a second refractive index layer 09 which are stacked, the first refractive index layer 07 is located at one side, far away from the circuit board 01, of the second refractive index layer 09, and the refractive index of the first refractive index layer 07 is smaller than that of the second refractive index layer 09.
In this embodiment, the refractive index of the first refractive index layer 07 is smaller than that of the second refractive index layer 09, so that when the large-angle light emitted by the light emitting unit 03 enters the first refractive index layer 07 through the second refractive index layer 09, total reflection occurs at the junction of the first refractive index layer 07 and the second refractive index layer 09, the light is reflected back to the reflective structure, and is reflected again by the reflective structure to converge towards the vertical direction, thereby achieving the effect of enhancing the light output of the front surface of the lamp panel, further improving the light output efficiency of the lamp panel, and enhancing the backlight brightness.
In order to ensure that the light reflecting structure fully reflects the light totally reflected at the junction of the first refractive index layer 07 and the second refractive index layer 09, the end portion of the light reflecting structure away from the circuit board 01 may be located at the same level as a side surface of the first refractive index layer 07 away from the circuit board.
In order to ensure that the light emitted from the light emitting unit 03 at a large angle is totally reflected at the boundary between the first refractive index layer 07 and the second refractive index layer 09, the refractive index difference between the first refractive index layer 07 and the second refractive index layer 09 should be as large as possible, and the refractive index of the first refractive index layer may be less than or equal to 1.3, for example, may be 1.2, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, or 1.3, and the refractive index of the second refractive index layer may be greater than or equal to 2, for example, may be 2.1, 2.2, or 2.3.
In some embodiments, as shown in fig. 7 and 8, the light panel further includes:
as shown in fig. 10, the second dimming structure 08 on the light emitting side of the circuit board 01 includes first refractive index units 081 and second refractive index units 082 alternately arranged in the second direction, and the refractive index of the first refractive index unit 081 is smaller than that of the second refractive index unit 082, so that after the light emitted by the light emitting unit 03 enters the second dimming structure 08, as shown in fig. 11, when the light enters the first refractive index unit 081 from the second refractive index unit 082, total reflection occurs at the junction of the first refractive index unit 081 and the second refractive index unit 082, so that the light is converged in the vertical direction, thereby achieving the effect of enhancing the light emitting efficiency of the front surface of the lamp panel, and further enhancing the backlight brightness.
In order to ensure that the light incident on the second dimming structure 08 is totally reflected at the boundary between the first refractive index unit 081 and the second refractive index unit 082, the refractive index difference between the first refractive index unit 081 and the second refractive index unit 082 should be as large as possible, the lower the refractive index of the first refractive index unit 081 is less than or equal to 1.3, the better the lower the refractive index, for example, 1.2, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28 or 1.29, and the higher the refractive index of the second refractive index unit 082 is, for example, 2.1, 2.2 or 2.3.
In order to ensure that as much light as possible is totally reflected at the boundary between the first refractive index unit 081 and the second refractive index unit 082, the width of the second refractive index unit 082 in the second direction is larger than the width of the first refractive index unit 081 in the second direction, specifically, the width of the second refractive index unit 082 in the second direction may be more than 2 times the width of the first refractive index unit 081 in the second direction, for example, the width of the second refractive index unit 082 in the second direction may be 3 times, 4 times or 5 times the width of the first refractive index unit 081 in the second direction.
In this embodiment, the propagation path of the light can be modulated by adjusting the refractive index difference between the first refractive index unit 081 and the second refractive index unit 082 and the widths of the first refractive index unit 081 and the second refractive index unit 082 in the second direction, so that the light is converged toward the vertical direction.
In this embodiment, the second dimming structure 08 may be located on a side of the first dimming structure away from the circuit board 01, and of course, the second dimming structure 08 may also be located on a side of the first dimming structure close to the circuit board 01. Preferably, the second dimming structure 08 is located at a side of the first dimming structure away from the circuit board 01, so that light emitted by the light emitting unit 03 first enters the first dimming structure, and after total reflection occurs at a junction of the first refractive index layer 07 and the second refractive index layer 09, the light is reflected to the reflective structure, and is reflected again by the reflective structure to exit the first dimming structure, so that the light utilization rate can be improved.
Fig. 12 is a schematic diagram showing light distribution of a light panel when a light emitting unit is turned on in this embodiment of the disclosure, S3 is a light distribution range that exits through the light emitting unit and propagates through a first Dimming structure and a second Dimming structure 08, and it can be seen that this embodiment of the disclosure technical scheme can perform light homogenization and modulation on light emitted by the light emitting unit 03, so that light emitted by the light emitting unit 03 is converged in a smaller range, thus greatly reducing the influence of the lighting of a single light emitting unit on the whole display area, reducing halation of an outgoing light spot, being beneficial to performing algorithm processing by adopting a Local Dimming control technology in the later period, improving contrast of images, and enhancing the display effect of images.
Embodiments of the present disclosure also provide a backlight including a lamp panel as described above. The backlight source of the embodiment can reduce halation of light spots emitted by the light emitting unit, is favorable for carrying out algorithm processing by adopting a Local Dimming technology in the later period, can improve the contrast of images, and improves the display effect of the images.
Embodiments of the present disclosure also provide a display device including a backlight as described above.
The display device includes, but is not limited to: the system comprises a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, a power supply and the like. It will be appreciated by those skilled in the art that the structure of the display device described above is not limiting of the display device, and that the display device may include more or less components described above, or may be combined with certain components, or may have different arrangements of components. In the embodiments of the present disclosure, the display apparatus includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.
The display device may be: any product or component with display function such as a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet personal computer and the like, wherein the display device further comprises a flexible circuit board, a printed circuit board and a backboard.
The embodiment of the disclosure also provides a manufacturing method of the lamp panel, as shown in fig. 7 and 8, including:
providing a circuit board 01;
forming a plurality of light emitting units 03 arranged in an array on the circuit board 01;
a light reflecting structure is formed between the adjacent light emitting units 03, the light reflecting structure comprises a supporting structure 05 and a light reflecting layer 06 covering the supporting structure 05, the ratio between the height of the light reflecting structure in a first direction and the maximum width of the light reflecting structure in a second direction is larger than 0.5, the reflectivity of the light reflecting layer 06 is larger than 90%, the first direction is perpendicular to the circuit board, and the second direction is parallel to the circuit board.
In this embodiment, form the reflection of light structure between the adjacent luminescence unit of lamp plate, the reflection of light structure comprises bearing structure and reflector layer, the aspect ratio of reflection of light structure is more than 0.5, when luminescence unit is luminous, the reflection of light structure can block and reflect the light that luminescence unit sent effectively, avoid the light diffusion that luminescence unit sent to other regions, thereby reduce the halation of luminescence unit outgoing facula, be favorable to adopting Local Dimming technique to carry out arithmetic processing in the later stage, can improve the contrast of image, improve the display effect of image.
Unlike the related art that the reflective structure is made of white ink, in this embodiment, the supporting structure 05 may be made of materials with a certain structural strength, such as acrylic, quartz, etc., and the supporting structure 05 may be coated with white ink as the reflective layer 06, where the supporting structure 05 has a certain structural strength, and is not limited by an aspect ratio bottleneck brought by a spot coating process, the height of the reflective structure may be increased, so that the aspect ratio (the ratio between the height in the first direction and the maximum width in the second direction) of the reflective structure is above 0.5, for example, the aspect ratio of the reflective structure may be 0.6, 0.7, 0.8, 0.9, 1, 2 or 3, so that the reflective structure has a larger height under the condition of a smaller occupied area, and the reflective structure with a larger height may effectively block and reflect light emitted by the light emitting unit 03, so as to avoid the light emitted by the light emitting unit 03 from diffusing to other areas, thereby reducing halation of the light spots emitted by the light emitting unit, facilitating the later arithmetic processing by adopting the Local Dimming technology, and improving the image display effect.
In addition, in this embodiment, only one layer of white ink needs to be coated as the reflective layer, and the whole reflective structure does not need to be manufactured by using the white ink, so that the usage amount of the white ink can be reduced, and the manufacturing cost of the lamp panel is further reduced.
In this embodiment, the supporting structure 05 is a columnar structure, and may be in various shapes such as a cylinder, a cuboid, a cone, a hemisphere, a semi-ellipsoid, etc.; as shown in fig. 7, the side surface of the support structure 05 may be a stepped structure; as shown in fig. 8, the support structure 05 may also be a rectangular parallelepiped structure.
When the side surface of the supporting structure 05 is of a step-shaped structure, slopes of different areas of the surface of the reflecting layer 06 are different, so as shown in fig. 9, a plurality of light rays with different angles emitted from the light-emitting unit 03 are incident on the surface of the reflecting layer 06 and can be reflected to converge towards the vertical direction, the effect of enhancing the front light-emitting effect of the lamp panel is achieved, the light-emitting efficiency of the lamp panel is improved, and the backlight brightness is enhanced. In this embodiment, the step-like structure of each side surface may include 3, 4, 5, or 6 step surfaces, and the widths and heights of the different step surfaces may be the same or different; the width and the height of the step surface can be adjusted according to the requirement, so that the reflecting structure can reflect light rays with various angles.
In some embodiments, as shown in fig. 7 and 8, the method further comprises:
on the light emitting side of the circuit board 01, a first dimming structure is formed to fill a gap between the light emitting unit 03 and the light reflecting structure, the first dimming structure comprises a first refractive index layer 07 and a second refractive index layer 09 which are stacked, the first refractive index layer 07 is located on one side, away from the circuit board 01, of the second refractive index layer 09, and the refractive index of the first refractive index layer 07 is smaller than that of the second refractive index layer 09.
In this embodiment, the refractive index of the first refractive index layer 07 is smaller than that of the second refractive index layer 09, so that when the large-angle light emitted by the light emitting unit 03 enters the first refractive index layer 07 through the second refractive index layer 09, total reflection occurs at the junction of the first refractive index layer 07 and the second refractive index layer 09, the light is reflected back to the reflective structure, and is reflected again by the reflective structure to converge towards the vertical direction, thereby achieving the effect of enhancing the light output of the front surface of the lamp panel, further improving the light output efficiency of the lamp panel, and enhancing the backlight brightness.
In order to ensure that the light reflecting structure fully reflects the light totally reflected at the junction of the first refractive index layer 07 and the second refractive index layer 09, the end portion of the light reflecting structure away from the circuit board 01 may be located at the same level as a side surface of the first refractive index layer 07 away from the circuit board.
In order to ensure that the light emitted from the light emitting unit 03 at a large angle is totally reflected at the boundary between the first refractive index layer 07 and the second refractive index layer 09, the refractive index difference between the first refractive index layer 07 and the second refractive index layer 09 should be as large as possible, and the refractive index of the first refractive index layer may be less than or equal to 1.3, for example, may be 1.2, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, or 1.3, and the refractive index of the second refractive index layer may be greater than or equal to 2, for example, may be 2.1, 2.2, or 2.3.
In some embodiments, as shown in fig. 7 and 8, the method further comprises:
the second dimming structure 08 is formed on the light emitting side of the circuit board 01, as shown in fig. 10, where the second dimming structure 08 includes first refractive index units 081 and second refractive index units 082 alternately arranged in the second direction, and the refractive index of the first refractive index units 081 is smaller than that of the second refractive index units 082, so that after the light emitted by the light emitting unit 03 enters the second dimming structure 08, as shown in fig. 11, when the light enters the first refractive index units 081 from the second refractive index units 082, total reflection occurs at the boundary between the first refractive index units 081 and the second refractive index units 082, so that the light is converged in the vertical direction, thereby achieving the effect of enhancing the light emitting of the front surface of the lamp panel, further improving the light emitting efficiency of the lamp panel, and enhancing the backlight brightness.
In order to ensure that the light incident on the second dimming structure 08 is totally reflected at the boundary between the first refractive index unit 081 and the second refractive index unit 082, the refractive index difference between the first refractive index unit 081 and the second refractive index unit 082 should be as large as possible, the refractive index of the first refractive index unit 081 is less than or equal to 1.3, such as 1.2, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29 or 1.3, and the refractive index of the second refractive index unit 082 is greater than or equal to 2, such as 2.1, 2.2 or 2.3.
In order to ensure that as much light as possible is totally reflected at the boundary between the first refractive index unit 081 and the second refractive index unit 082, the width of the second refractive index unit 082 in the second direction is larger than the width of the first refractive index unit 081 in the second direction, specifically, the width of the second refractive index unit 082 in the second direction may be more than 2 times the width of the first refractive index unit 081 in the second direction, for example, the width of the second refractive index unit 082 in the second direction may be 3 times, 4 times or 5 times the width of the first refractive index unit 081 in the second direction.
In this embodiment, the propagation path of the light can be modulated by adjusting the refractive index difference between the first refractive index unit 081 and the second refractive index unit 082 and the widths of the first refractive index unit 081 and the second refractive index unit 082 in the second direction, so that the light is converged toward the vertical direction.
In some embodiments, forming the second dimming structure comprises:
and forming the second dimming structure on one side of the first dimming structure away from the circuit board.
In this embodiment, the second dimming structure 08 may be located on a side of the first dimming structure away from the circuit board 01, and of course, the second dimming structure 08 may also be located on a side of the first dimming structure close to the circuit board 01. Preferably, the second dimming structure 08 is located at a side of the first dimming structure away from the circuit board 01, so that light emitted by the light emitting unit 03 first enters the first dimming structure, and after total reflection occurs at a junction of the first refractive index layer 07 and the second refractive index layer 09, the light is reflected to the reflective structure, and is reflected again by the reflective structure to exit the first dimming structure, so that the light utilization rate can be improved.
In this specification, all embodiments are described in a progressive manner, and identical and similar parts of the embodiments are all referred to each other, and each embodiment is mainly described in a different way from other embodiments. In particular, for the embodiments, since they are substantially similar to the product embodiments, the description is relatively simple, and the relevant points are found in the section of the product embodiments.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. The scope of the disclosure should, therefore, be determined with reference to the appended claims 。
Claims (15)
1. A lamp panel, comprising:
a circuit board;
a plurality of light emitting units arranged in an array on the circuit board;
the light reflecting structure comprises a supporting structure and a light reflecting layer covering the supporting structure, wherein the ratio between the height of the light reflecting structure in a first direction and the maximum width of the light reflecting structure in a second direction is larger than 0.5, the reflectivity of the light reflecting layer is larger than 90%, the first direction is perpendicular to the circuit board, and the second direction is parallel to the circuit board.
2. The lamp panel of claim 1, further comprising:
the first dimming structure is positioned on the light emitting side of the circuit board and fills the gap between the light emitting unit and the light reflecting structure, the first dimming structure comprises a first refractive index layer and a second refractive index layer which are arranged in a laminated mode, the first refractive index layer is positioned on one side, far away from the circuit board, of the second refractive index layer, and the refractive index of the first refractive index layer is smaller than that of the second refractive index layer.
3. The lamp panel of claim 2, wherein the refractive index of the first refractive index layer is less than or equal to 1.3 and the refractive index of the second refractive index layer is greater than or equal to 2.
4. The lamp panel of claim 2, further comprising:
the second dimming structure is positioned on the light emitting side of the circuit board and comprises first refractive index units and second refractive index units which are alternately arranged in a second direction, and the refractive index of the first refractive index units is smaller than that of the second refractive index units.
5. The lamp panel of claim 4, wherein the refractive index of the first refractive index unit is less than or equal to 1.3 and the refractive index of the second refractive index unit is greater than or equal to 2.
6. The light panel of claim 4, wherein a width of the second refractive index unit in the second direction is greater than a width of the first refractive index unit in the second direction.
7. The lamp panel of claim 4, wherein the second dimming structure is located on a side of the first dimming structure remote from the circuit board.
8. The light panel of claim 1, wherein the side surface of the support structure is a stepped structure.
9. A backlight comprising a lamp panel as claimed in any one of claims 1 to 8.
10. A display device comprising the backlight of claim 9.
11. The manufacturing method of the lamp panel is characterized by comprising the following steps:
providing a circuit board;
forming a plurality of light emitting units arranged in an array on the circuit board;
and forming a light reflecting structure between adjacent light emitting units, wherein the light reflecting structure comprises a supporting structure and a light reflecting layer covering the supporting structure, the ratio between the height of the light reflecting structure in a first direction and the maximum width of the light reflecting structure in a second direction is larger than 0.5, the reflectivity of the light reflecting layer is larger than 90%, the first direction is perpendicular to the circuit board, and the second direction is parallel to the circuit board.
12. The method of manufacturing a lamp panel of claim 11, further comprising:
and forming a first dimming structure for filling a gap between the light emitting unit and the light reflecting structure on the light emitting side of the circuit board, wherein the first dimming structure comprises a first refractive index layer and a second refractive index layer which are stacked, the first refractive index layer is positioned on one side, far away from the circuit board, of the second refractive index layer, and the refractive index of the first refractive index layer is smaller than that of the second refractive index layer.
13. The method of manufacturing a light panel of claim 12, further comprising:
and forming a second dimming structure on the light emitting side of the circuit board, wherein the second dimming structure comprises first refractive index units and second refractive index units which are alternately arranged in a second direction, and the refractive index of the first refractive index units is smaller than that of the second refractive index units.
14. The method of claim 13, wherein forming the second dimming structure comprises:
and forming the second dimming structure on one side of the first dimming structure away from the circuit board.
15. The method of manufacturing a lamp panel of claim 11, wherein forming the support structure comprises:
forming a columnar transition support structure;
and etching the side surface of the transition support structure to form the support structure with the side surface of the step-shaped structure.
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|---|---|---|---|
| CN202311411993.7A CN117346086A (en) | 2023-10-27 | 2023-10-27 | Lamp panel, manufacturing method thereof, backlight source and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311411993.7A CN117346086A (en) | 2023-10-27 | 2023-10-27 | Lamp panel, manufacturing method thereof, backlight source and display device |
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| CN117346086A true CN117346086A (en) | 2024-01-05 |
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| CN202311411993.7A Pending CN117346086A (en) | 2023-10-27 | 2023-10-27 | Lamp panel, manufacturing method thereof, backlight source and display device |
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| CN (1) | CN117346086A (en) |
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