CN116466513A - Lamp panel, display device and lamp panel preparation method - Google Patents
Lamp panel, display device and lamp panel preparation method Download PDFInfo
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- CN116466513A CN116466513A CN202310358890.2A CN202310358890A CN116466513A CN 116466513 A CN116466513 A CN 116466513A CN 202310358890 A CN202310358890 A CN 202310358890A CN 116466513 A CN116466513 A CN 116466513A
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
- F21V19/0015—Fastening arrangements intended to retain light sources
- F21V19/0025—Fastening arrangements intended to retain light sources the fastening means engaging the conductors of the light source, i.e. providing simultaneous fastening of the light sources and their electric connections
-
- 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
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
- F21V23/005—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate is supporting also the light source
-
- 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
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133612—Electrical details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application relates to a lamp panel, a display device and a lamp panel preparation method. The lamp panel comprises a driving substrate and lamp beads, and the lamp panel preparation method comprises the following steps: providing a driving substrate, wherein the driving substrate is provided with a plurality of preset areas arranged in an array; forming a first reflecting layer on the surface of the driving substrate except for other areas of a preset area, wherein the preset area comprises a central area and an edge area which are connected, and the edge area is circumferentially arranged around the central area; forming a second reflecting layer in the edge area, wherein the reflecting intensity of the first reflecting layer is higher than that of the second reflecting layer, and the first reflecting layer and the second reflecting layer are connected and arranged in the same layer; the lamp beads are bound and connected to the driving substrate in the central area, so that the lamp beads cover the central area in the orthographic projection of the lamp beads to the driving substrate. The lamp panel, the display device and the lamp panel manufacturing method reduce the lamp panel assembly difficulty, improve the assembly precision, and improve the light utilization rate so as to avoid the occurrence of the lamp shadow phenomenon.
Description
Technical Field
The application relates to the technical field of display, in particular to a lamp panel, a display device and a lamp panel preparation method.
Background
In recent years, with the vigorous development of Mini-LED display products, the market is presented with a display ultra-high definition product of Mini-LED backlight and liquid crystal glass combined with quantum dot technology and backlight massive partition technology. The picture quality of the OLED is not inferior, but the cost, the reliability and the service life of the OLED are higher than those of the OLED. The liquid crystal product designed by adopting the direct type LED backlight source technology utilizes an assembled reflecting sheet to reflect scattered light which is directly irradiated to the outside of the diffusion plate by the LED light source so as to mix light. However, due to the limitation of the Mini-LED size, when the reflector plate and the LED are assembled on the back plate, the assembly difficulty is high, the assembly precision is low, the assembly gap is easy to appear, the light loss is caused, the light rays irradiating the liquid crystal panel are easy to be uneven, the lamp shadow phenomenon appears, and the display effect of the liquid crystal product is seriously affected.
Disclosure of Invention
The application aims at providing a lamp panel, a display device and a lamp panel preparation method, wherein the assembly accuracy is improved while the assembly difficulty of the lamp panel is reduced, and the light utilization rate is improved so as to avoid the occurrence of a lamp shadow phenomenon.
In a first aspect, an embodiment of the present application provides a method for manufacturing a lamp panel, where the lamp panel includes a driving substrate and a lamp bead, and the method includes:
providing a driving substrate, wherein the driving substrate is provided with a plurality of preset areas arranged in an array;
forming a first reflecting layer on the surface of the driving substrate except for other areas of a preset area, wherein the preset area comprises a central area and an edge area which are connected, and the edge area is circumferentially arranged around the central area;
forming a second reflecting layer in the edge area, wherein the reflecting intensity of the first reflecting layer is higher than that of the second reflecting layer, and the first reflecting layer and the second reflecting layer are connected and arranged in the same layer;
the lamp beads are bound and connected to the driving substrate in the central area, so that the lamp beads cover the central area in the orthographic projection of the lamp beads to the driving substrate.
In one possible embodiment, the second reflective layer comprises a reflective sub-layer and a barrier layer in a stacked arrangement, the method of making comprising:
and coating the same material as the first reflecting layer on the edge area, curing to obtain a reflecting sub-layer, and coating a shielding material on a part of the area on the reflecting sub-layer to form a shielding layer.
In one possible embodiment, the mask assembly further includes a first mask plate, the first mask plate is provided with a plurality of first shielding portions arranged at intervals, and the preparation method includes:
providing a first mask plate, placing the first mask plate above the driving substrate, enabling the first shielding part to correspond to a preset area, and enabling the first shielding part to coincide with the preset area in the orthographic projection of the first mask plate to the driving substrate;
and coating a first reflecting layer on the surface of the driving substrate through the first mask plate, and forming the first reflecting layer in other areas except the preset area under the shielding of the first shielding part.
In one possible embodiment, the mask assembly further includes a second mask plate, the second mask plate having a plurality of openings, the method of making comprising:
providing a second mask plate, placing the second mask plate above the driving substrate, enabling the opening to be opposite to the edge area, and enabling the opening to coincide with the edge area in the orthographic projection of the second mask plate to the driving substrate;
and coating a second reflecting layer on the surface of the driving substrate through a second mask plate, and forming the second reflecting layer in the edge area under the shielding of the second mask plate.
In one possible embodiment, after the lamp beads are bound and connected to the driving substrate in the central region, the preparation method further comprises: and carrying out packaging treatment on the lamp beads to form a packaging layer, and carrying out orthographic projection on the lamp beads to the driving substrate, wherein the packaging layer covers the lamp beads, the first reflecting layer and the second reflecting layer.
In one possible embodiment, after the first reflective layer and the second reflective layer are coated on the surface of the driving substrate, the lamp beads are bound and connected to the central area in a huge amount transfer manner.
In a second aspect, an embodiment of the present application provides a light panel, including:
the driving substrate is provided with a plurality of preset areas on the surface of which an array is arranged, wherein the preset areas comprise a central area and an edge area which are connected, and the edge area is arranged around the circumference of the central area;
the first reflecting layer is coated on the surface of the driving substrate in other areas except the preset area;
the second reflecting layer is coated on the edge area, the reflecting intensity of the first reflecting layer is higher than that of the second reflecting layer, and the first reflecting layer and the second reflecting layer are connected and arranged in the same layer;
the lamp beads are bound and connected to the central area, and the lamp beads cover the central area after orthographic projection of the lamp beads to the driving substrate.
In one possible embodiment, the second reflective layer comprises a reflective sub-layer and a barrier layer arranged in a stack, the reflective sub-layer being located between the barrier layer and the edge region, the barrier layer shielding a portion of the reflective sub-layer and forming the reflective sub-layer of the same material as the first reflective layer.
In one possible embodiment, the shielding layer includes a plurality of shielding blocks, and the plurality of shielding blocks are arranged at intervals on the reflective sub-layer, or the plurality of shielding blocks are uniformly arranged in the circumferential direction at the edge region.
In a third aspect, embodiments of the present application provide a display device including the light panel described in the foregoing description.
According to the lamp panel, the display device and the lamp panel manufacturing method, the reflection layer is directly formed on the surface of the driving substrate, so that the assembly of small-size display panels such as Mini-LEDs is facilitated, compared with a traditional process for assembling the reflection sheet, the assembly steps are saved, and the position relation of the reflection sheet relative to the lamp beads is not required to be adjusted repeatedly. And, with first reflection stratum, second reflection stratum and lamp pearl respectively shaping in the different regions of drive base plate, guaranteed the position accuracy of the relative lamp pearl of fashioned reflection stratum, avoid appearing the clearance between lamp pearl and the reflection stratum for light leaks from the clearance, and then causes the light loss and leads to the light inhomogeneous of shining liquid crystal display panel easily, thereby appears the lamp shadow phenomenon.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, like parts are designated with like reference numerals. The drawings are not drawn to scale, but are merely for illustrating relative positional relationships, and the layer thicknesses of certain portions are exaggerated in order to facilitate understanding, and the layer thicknesses in the drawings do not represent the actual layer thickness relationships.
Fig. 1 is a partial cross-sectional view illustrating a lamp panel assembled to a display device according to an embodiment of the present disclosure;
fig. 2 shows a top view of a driving substrate in a lamp panel according to an embodiment of the present disclosure;
fig. 3 shows a flowchart of a method for manufacturing a lamp panel according to an embodiment of the present application;
fig. 4 is a partial cross-sectional view of a lamp panel according to an embodiment of the present disclosure;
FIG. 5 is a partial cross-sectional view illustrating a second step in the manufacturing process of another lamp panel according to an embodiment of the present disclosure;
fig. 6 is a partial cross-sectional view of a third step in the manufacturing process of another lamp panel according to the embodiment of the present application;
fig. 7 is a partial cross-sectional view illustrating a fourth step in the manufacturing process of another lamp panel according to the embodiment of the present application;
FIG. 8 is a partial cross-sectional view of a lamp panel provided in an embodiment of the present application utilizing a mask assembly to prepare a first reflective layer;
FIG. 9 is a partial cross-sectional view of a lamp panel provided in an embodiment of the present application utilizing a mask assembly to prepare a second reflective layer;
fig. 10 shows a top view of a second reflective layer in a lamp panel according to an embodiment of the present disclosure;
FIG. 11 is a top view of a second reflective layer in another lamp panel according to an embodiment of the present disclosure;
FIG. 12 is a top view of a second reflective layer in yet another lamp panel according to an embodiment of the present disclosure;
fig. 13 is a top view of a second reflective layer in another lamp panel according to an embodiment of the present disclosure.
Reference numerals illustrate:
1. a back plate; 2. a lamp panel; 21. a driving substrate; 22. a lamp bead; 23. a first reflective layer; 24. a second reflective layer; 241. a reflective sub-layer; 242. a shielding layer; 25. an encapsulation layer; 3. a diffusion plate; 4. an optical film; 5. a liquid crystal panel; 6. frame glue; 7. a cushion pad; 8. a mask assembly; 81. a first mask plate; 811. a first shielding portion; 82. a second mask; 821. opening holes; A. a preset area; a1, a central area; a2, edge area.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing an example of the present application. In the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; also, the size of the region structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Fig. 1 is a partial cross-sectional view illustrating a lamp panel assembled to a display device according to an embodiment of the present disclosure; fig. 2 shows a top view of a driving substrate in a lamp panel according to an embodiment of the present application.
As shown in fig. 1 and 2, the embodiment of the present application provides a lamp panel, which includes a driving substrate 21 and a plurality of lamp beads 22.
The driving substrate 21 includes a plurality of preset areas a arranged in an array on a surface thereof, the preset areas a including a central area A1 and an edge area A2 connected to each other, the edge area A2 being arranged around a circumference of the central area A1, and the lamp beads 22 being bonded to the central area A1.
Alternatively, the shape of the preset area a may be a circle, or may be a polygonal structure such as a triangle, a rectangle, etc., and the shape of the set central area A1 may be adaptively matched according to the specific shape, size, etc. of the lamp bead 22, which is not limited herein.
Alternatively, the driving substrate 21 is a hard Printed Circuit Board (PCB) to which the lamp beads 22 are soldered. Optionally, the driving substrate 21 is a glass substrate, the lamp beads 22 are adhered on the driving substrate 21 by adopting COB (Chips on Board) or COG (Chips on Glass) technology through conductive adhesive or non-conductive adhesive, and then wire bonding is performed to realize electrical connection, so that a bracket, gold wires and the like are not needed, less materials are used, primary reflow soldering can be reduced in the process, and secondary reflow risks are avoided. The lamp beads 22 may be blue light chips having dominant wavelengths in the range of 440nm-470 nm.
In some embodiments, the light beads 22 are Micro-light emitting diodes (Micro-LEDs) or sub-millimeter light emitting diodes (Mini-LEDs). The light type energy distribution of the lamp beads 22 is in a langerhans-like distribution, and the central light energy is the largest. Wherein Micro-LED refers to an LED chip with a grain size below 200 microns, mini-LED refers to an LED chip with a grain size of about 200-300 microns. Mini-LED or Micro-LED can be used as self-luminous element for display, and has the advantages of low power consumption, high brightness, high resolution, high color saturation, rapid reaction speed, long service life, high efficiency and the like.
Wherein, the first reflecting layer 23 is coated on the surface of the driving substrate 21 except other areas of the preset area A; the second reflecting layer 24 is coated on the edge area A2, the reflecting intensity of the first reflecting layer 23 is higher than that of the second reflecting layer 24, and the first reflecting layer 23 and the second reflecting layer 24 are connected and arranged in the same layer; the lamp beads 22 are bonded to the central area A1, and the lamp beads 22 cover the central area A1 when the lamp beads 22 are projected forward toward the driving substrate 21. By directly forming the reflecting layer on the surface of the driving substrate 21, the assembly of small-sized display panels such as Mini-LEDs is facilitated, and compared with the traditional process for assembling the reflecting sheet, the assembly step is saved, and the position relation of the reflecting sheet relative to the lamp beads 22 does not need to be adjusted repeatedly. And, respectively shaping first reflection stratum 23, second reflection stratum 24 and lamp pearl 22 in the different regions of drive base plate 21, guaranteed the position accuracy of the relative lamp pearl 22 of the reflection stratum of shaping, avoided appearing the clearance between lamp pearl 22 and the reflection stratum for light leaks from the clearance, and then causes the light loss and leads to the light inhomogeneous of shining liquid crystal panel 5 easily, thereby appears the lamp shadow phenomenon.
In an alternative embodiment, in order to enable the first reflective layer 23 and the second reflective layer 24 to be molded to have the desired different reflection intensities, the reflective materials used to mold the first reflective layer 23 and the second reflective layer 24 may be set to be different so that the reflection intensity of the reflective material forming the first reflective layer 23 is greater than the reflection intensity of the reflective material of the second reflective layer 24. Alternatively, the second reflective layer 24 may include a reflective sub-layer 241 and a shielding layer 242 which are stacked, the reflective sub-layer 241 is located between the shielding layer 242 and the edge area A2, the shielding layer 242 shields a portion of the reflective sub-layer 241, and the reflective sub-layer 241 is formed of the same material as that of the first reflective layer 23. To effect a change in the intensity of the reflection with the shielding of the portion of the reflective sub-layer 241 by the shielding layer 242.
Optionally, the shielding layer 242 includes a plurality of shielding blocks, and the plurality of shielding blocks are spaced apart from the reflective sub-layer 241, or the plurality of shielding blocks are uniformly circumferentially arranged in the edge area A2. It is to be understood that the shielding area, the shielding shape, and the like of the reflective sub-layer 241 by the shielding layer 242 may be adaptively adjusted according to the needs, and are not particularly limited herein.
It will be appreciated that, in order to ensure a better light reflection effect, the material selected for the first reflective layer 23 may be white paint, and the white paint is sprayed and cured on the corresponding area of the driving substrate 21. While the shielding layer 242 may be coated on the reflective sub-layer 241 in a desired shape and size by using ink or black paint, which is not particularly limited herein.
The following describes in detail the manufacturing method of the lamp panel 2 according to the embodiment of the present application with reference to the accompanying drawings.
Referring to fig. 3, the method for manufacturing the lamp panel 2 includes:
s100, providing a driving substrate 21, where the driving substrate 21 is provided with a plurality of preset areas a arranged in an array.
S110, forming a first reflective layer 23 on the surface of the driving substrate 21 except for other areas of a preset area a, wherein the preset area a includes a central area A1 and an edge area A2 connected to each other, and the edge area A2 is arranged around the circumference of the central area A1.
S120, forming a second reflecting layer 24 in the edge area A2, wherein the reflecting intensity of the first reflecting layer 23 is higher than that of the second reflecting layer 24, and connecting the first reflecting layer 23 and the second reflecting layer 24 and arranging the first reflecting layer and the second reflecting layer in the same layer.
S130, binding and connecting the lamp beads 22 to the driving substrate 21 in the central area A1, so that the lamp beads 22 cover the central area A1 in the orthographic projection of the lamp beads 22 to the driving substrate 21.
The first reflecting layer 23, the second reflecting layer 24 and the lamp beads 22 are molded in different areas of the driving substrate 21 step by step, so that the parts are not overlapped, the use of reflecting materials is saved, and the cost is reduced. Meanwhile, the mode of processing part by part in the divided areas ensures that the relative position precision among the formed first reflecting layer 23, the second reflecting layer 24 and the lamp beads 22 is higher, the three layers cannot be overlapped and avoid reduction, so that the reflecting layer can reflect light fully, the light utilization rate is improved, the light loss is avoided, the light irradiated to the liquid crystal panel 5 is more uniform, and the lamp shadow phenomenon is avoided.
In an alternative embodiment, after the lamp beads 22 are bound and connected to the driving substrate 21 in the central area A1, the preparation method further includes: the lamp beads 22 are subjected to encapsulation treatment to form an encapsulation layer 25, and the encapsulation layer 25 covers the lamp beads 22, the first reflection layer 23 and the second reflection layer 24 in orthographic projection of the lamp beads 22 to the driving substrate 21. The lamp beads 22 are protected by the arranged packaging layer 25, and because the first reflecting layer 23 and the second reflecting layer 24 are directly molded in the corresponding area of the driving substrate 21 in advance, when packaging is carried out, resin for packaging needs to be heated and then solidified so as to realize the packaging process, the first reflecting layer 23 and the second reflecting layer 24 cannot be influenced by packaging to generate position offset relative to the lamp beads 22, the relative position relation among the first reflecting layer 23, the second reflecting layer 24 and the lamp beads 22 is ensured, the occurrence of lamp shadows caused by gaps is avoided, and the lamp beads have higher stability.
It will be appreciated that the beads 22 are connected to each other and do not overlap each other by the first reflective layer 23, the second reflective layer 24, and the beads 22 in the front projection of the driving substrate 21.
In a specific embodiment, referring to fig. 4 to fig. 7, the steps of preparing the lamp panel 2 are in one-to-one correspondence, and the method of preparing the lamp panel 2 is described in detail below by taking white paint as an example of the reflective material selected for the first reflective layer 23 and the reflective sub-layer 241.
As shown in fig. 4, the driving substrate 21 is coated with white paint in other areas except the preset area a, and the first reflective layer 23 is formed in other areas after the white paint is cured.
As shown in fig. 5, a layer of white paint is coated on the edge area A2, after curing, a reflective sub-layer 241 is obtained, and then a shielding layer 242 with a required shape and size is coated on the reflective sub-layer 241, so that the reflection intensity of the formed second reflective layer 24 is lower than that of the first reflective layer 23, and the uniformity of light mixing is ensured.
Alternatively, referring to fig. 8 and 9, in order to secure the coating accuracy of the first and second reflective layers 23 and 24, the mask assembly 8 may be used as an auxiliary tool for spraying. Specifically, the mask assembly 8 includes a first mask 81 and a second mask 82, where the first mask 81 is provided with a plurality of first shielding portions 811 arranged at intervals, and the second mask 82 is provided with a plurality of openings 821, and the preparation method specifically includes:
in preparing the first reflective layer 23:
referring to fig. 8, a first mask plate 81 is provided, the first mask plate 81 is placed above the driving substrate 21, and the first shielding portion 811 corresponds to the preset area a, and in the orthographic projection of the first mask plate 81 to the driving substrate 21, the first shielding portion 811 coincides with the preset area a; the first reflective layer 23 is coated on the surface of the driving substrate 21 through the first mask plate 81, and the first reflective layer 23 is formed in the other region except the preset region a under the shielding of the first shielding portion 811. The first mask plate 81 can shield the preset area a to avoid pollution or waste of white paint of the preset area a affecting uniformity when other areas are sprayed, and improve the forming precision of the first reflecting layer 23 on the driving substrate 21.
Alternatively, the first mask plate 81 may be formed by combining a plurality of sub-plates, so that, in order to facilitate shielding of a plurality of preset areas a arranged in an array, the plurality of sub-plates may be combined in different forms and sprayed in multiple times, so long as the sprayed areas are ensured to be complete and the sprayed areas are not repeated, which is not particularly limited herein.
In preparing the second reflective layer 24:
referring to fig. 9, a second mask 82 is provided, the second mask 82 is placed over the driving substrate 21 with the opening being opposite to the edge area A2, and in the front projection of the second mask 82 to the driving substrate 21, the aperture 821 coincides with the edge area A2; the second reflection layer 24 is coated on the surface of the driving substrate 21 through the second mask 82, and the second reflection layer 24 is formed in the edge area A2 under the shielding of the second mask 82. Other areas except the edge area A2 can be shielded by the second mask plate 82, so that the spraying precision in spraying the edge area A2 is ensured, and the light utilization rate is improved by spraying the second reflecting layer 24 with high stability and precision because the area is a position where light spots easily appear, so that the uniformity of mixed light is ensured.
Specifically, when the second reflection layer 24 is formed by combining the reflection sub-layer 241 and the shielding layer 242 which are stacked, the manufacturing method of the lamp panel 2 includes:
the same material as the first reflective layer 23 is applied to the edge area A2, and after curing, a reflective sub-layer 241 is obtained, and a shielding material is applied to a partial area on the reflective sub-layer 241 to form a shielding layer 242.
It will be appreciated that the second mask 82 may include a plurality of sub-plates that are combined in different forms to block a desired area, and the shape and size of the opening 821 may be adaptively adjusted according to the shape of the spraying, so as to form the reflective sub-layer 241 and the blocking layer 242 respectively, which is not particularly limited herein.
Alternatively, referring to fig. 10 to 13, when the shielding layer 242 is sprayed by using the second mask 82, a plurality of openings 821 of a plurality of mask plates with different shapes may be combined to form different shapes, and the different shapes are placed above the edge area A2, and a plurality of shielding blocks of the same edge area A2 are sprayed simultaneously or step by step, so as to form shielding layers 242 with different patterns, where the shapes may be adaptively adjusted according to the area of the required shielding reflective sub-layer 241 and the actual situations such as the easy occurrence of the light spots, which is not limited herein.
As shown in fig. 6, after the driving substrate 21 is coated with the first reflective layer 23 and the second reflective layer 24, the lamp beads 22 are bonded and connected to the central area A1 by mass transfer. Optionally, the lamp beads 22 are fabricated on the driving substrate 21 by mass transfer, which is not limited to Wire Bonding (Wire Bonding), flip chip (Flip Chip Bonding), a combination of photolithography and pattern transfer, and the like. In addition, the term "Micro light emitting diode (Micro-LED)" or "submillimeter light emitting diode (Mini-LED)" refers to a generic term for the entire light emitting structure formed in the various steps of manufacturing the lamp bead 22, including all layers or regions that have been formed.
As shown in fig. 7, the lamp beads 22 are encapsulated with an encapsulating resin, and the formed encapsulation layer 25 covers the lamp beads 22, the first reflection layer 23, and the second reflection layer 24 in the orthographic projection of the lamp beads 22 onto the driving substrate 21.
The embodiment of the application also provides a display device, which comprises the lamp panel 2.
In one example, the display device is a liquid crystal display module, and includes a liquid crystal panel 5 and a backlight module disposed on a backlight side of the liquid crystal panel 5, between which a cushion pad 7 is disposed, and since the liquid crystal panel 5 does not emit light, the backlight module needs to be disposed to provide a light source with enough brightness and uniform distribution, so that the liquid crystal panel can display images normally. The backlight module is used for providing a light source for the liquid crystal display panel. The backlight module comprises a back plate 1, a lamp panel 2 and an optical assembly, which are connected through a frame glue 6.
The material of the back plate 1 may be any metal material, such as aluminum plate, aluminum alloy plate or galvanized steel, and is manufactured by stamping or other processes. The metal material has better ductility, and can protect the backlight module from being broken easily under the impact of external force. The back plate 1 may also be made of plastic material, such as polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene, etc., so as to reduce the weight of the backlight module and reduce the cost of the backlight module.
The lamp panel 2 is positioned on the back plate 1, and the optical component is positioned on one side of the lamp panel 2 away from the back plate 1. The optical component may include, for example, but not limited to, a diffusion plate 3, an optical film 4, a light-homogenizing plate, a prism structure located on the light-emitting surface side of the light-homogenizing plate, etc., so as to further improve the overall display effect of the backlight module. Wherein, bubble or micropore structure can be provided with to the inside of even light board to incident light can have the super high reflectivity to delay the light outgoing, acquire bigger optical path, reach the effect of even light-emitting. The backlight surface of the light homogenizing plate is provided with an orange-peel-shaped fine structure for forming a diffuse reflection surface, and the light rays are disordered, so that the light rays are prevented from directly exiting from the light emitting surface, and the light ray efficiency can be improved.
The liquid crystal panel 5 includes an array substrate and a color film substrate disposed opposite to each other, and a liquid crystal layer disposed between the array substrate and the color film substrate, wherein the liquid crystal layer includes a plurality of liquid crystal molecules, which are generally rod-shaped and can flow like a liquid and have certain crystal characteristics. When the liquid crystal molecules are in an electric field, the alignment direction thereof is changed according to the change of the electric field.
Further, the display device further comprises an upper polarizer located on the light emitting side of the liquid crystal panel 5 and a lower polarizer located on the backlight side of the liquid crystal panel 5. The lower and upper polarizers polarize incident light of the liquid crystal panel 5 to allow light vibrating in only one direction to be transmitted.
It should be readily understood that the terms "on … …", "above … …" and "above … …" in this application should be interpreted in the broadest sense such that "on … …" means not only "directly on something" but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes the meaning of "not only" on something "or" above "but also" above "or" above "without intermediate features or layers therebetween (i.e., directly on something).
The term "layer" as used herein may refer to a portion of material that includes regions having a certain thickness. The layer may extend over the entire underlying or overlying structure, or may have a range that is less than the range of the underlying or overlying structure. Further, the layer may be a region of a continuous structure, either homogenous or non-homogenous, having a thickness less than the thickness of the continuous structure. For example, the layer may be located between the top and bottom surfaces of the continuous structure or between any pair of lateral planes at the top and bottom surfaces. The layers may extend laterally, vertically and/or along a tapered surface.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The lamp panel comprises a driving substrate and lamp beads, and is characterized by comprising the following steps:
providing a driving substrate, wherein the driving substrate is provided with a plurality of preset areas arranged in an array;
forming a first reflecting layer on the surface of the driving substrate except for other areas of the preset area, wherein the preset area comprises a central area and an edge area which are connected, and the edge area is arranged around the circumference of the central area;
forming a second reflecting layer in the edge area, wherein the reflecting intensity of the first reflecting layer is higher than that of the second reflecting layer, and the first reflecting layer and the second reflecting layer are connected and arranged in the same layer;
and binding and connecting the lamp beads to the driving substrate in the central area, so that the lamp beads cover the central area in the orthographic projection of the lamp beads to the driving substrate.
2. The method of manufacturing a lamp panel according to claim 1, wherein the second reflective layer comprises a reflective sub-layer and a barrier layer in a stacked arrangement, the method comprising:
and coating the same material as the first reflecting layer on the edge area, curing to obtain the reflecting sub-layer, and coating shielding materials on partial areas on the reflecting sub-layer to form the shielding layer.
3. The method of claim 1, further comprising a mask assembly, the mask assembly comprising a first mask, the first mask having a plurality of first shielding portions arranged at intervals, the method comprising:
providing the first mask plate, placing the first mask plate above the driving substrate, enabling the first shielding part to correspond to the preset area, and enabling the first shielding part to coincide with the preset area in the orthographic projection of the first mask plate to the driving substrate;
and coating a first reflecting layer on the surface of the driving substrate through the first mask plate, and forming the first reflecting layer in other areas except the preset area under the shielding of the first shielding part.
4. The method of manufacturing a lamp panel according to claim 3, wherein the mask assembly further comprises a second mask plate, the second mask plate is provided with a plurality of openings, the method of manufacturing comprises:
providing the second mask plate, placing the second mask plate above the driving substrate, enabling the opening to be opposite to the edge area, and enabling the opening to coincide with the edge area in the orthographic projection of the second mask plate to the driving substrate;
and coating the second reflecting layer on the surface of the driving substrate through the second mask plate, and forming the second reflecting layer in the edge area under the shielding of the second mask plate.
5. The method of claim 1, wherein after the lamp beads are bound to the driving substrate in the central area, the method further comprises: and carrying out encapsulation treatment on the lamp beads to form an encapsulation layer, wherein the lamp beads are subjected to orthographic projection on the driving substrate, and the encapsulation layer covers the lamp beads, the first reflection layer and the second reflection layer.
6. The method of claim 1, wherein the beads are bound to the central region by mass transfer after the first reflective layer and the second reflective layer are coated on the surface of the driving substrate.
7. A lamp panel, comprising:
the device comprises a driving substrate, wherein a plurality of preset areas are arranged on the surface of the driving substrate in an array manner, the preset areas comprise a central area and an edge area which are connected, and the edge area is arranged around the circumference of the central area;
the first reflecting layer is coated on the surface of the driving substrate except other areas of the preset area;
the second reflecting layer is coated on the edge area, the reflecting intensity of the first reflecting layer is higher than that of the second reflecting layer, and the first reflecting layer and the second reflecting layer are connected and arranged in the same layer;
the lamp beads are bound and connected to the central area, orthographic projection of the lamp beads to the driving substrate is carried out, and the lamp beads cover the central area.
8. The lamp panel of claim 7, wherein the second reflective layer comprises a reflective sub-layer and a barrier layer in a stacked arrangement, the reflective sub-layer being located between the barrier layer and the edge region, the barrier layer shielding portions of the reflective sub-layer and forming the reflective sub-layer from the same material as the first reflective layer.
9. The lamp panel of claim 8, wherein the shielding layer comprises a plurality of shielding blocks, the plurality of shielding blocks being arranged at intervals in the reflective sub-layer or the plurality of shielding blocks being circumferentially uniformly arranged in the edge region.
10. A display device comprising a lamp panel as claimed in any one of claims 7 to 9.
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| CN202310358890.2A CN116466513A (en) | 2023-03-28 | 2023-03-28 | Lamp panel, display device and lamp panel preparation method |
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| CN202310358890.2A CN116466513A (en) | 2023-03-28 | 2023-03-28 | Lamp panel, display device and lamp panel preparation method |
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| CN102052606A (en) * | 2009-10-26 | 2011-05-11 | 夏普株式会社 | Backlight unit and display device including the same |
| CN113126363A (en) * | 2019-12-31 | 2021-07-16 | 海信视像科技股份有限公司 | Display device |
| CN215526304U (en) * | 2021-09-28 | 2022-01-14 | 青岛智动精工电子有限公司 | Lamp panel, backlight module and display device |
| CN114759135A (en) * | 2022-04-27 | 2022-07-15 | 广州华星光电半导体显示技术有限公司 | Driving backboard and manufacturing method thereof, light-emitting substrate and manufacturing method thereof |
| CN217387154U (en) * | 2022-06-02 | 2022-09-06 | 海信视像科技股份有限公司 | Display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102052606A (en) * | 2009-10-26 | 2011-05-11 | 夏普株式会社 | Backlight unit and display device including the same |
| CN113126363A (en) * | 2019-12-31 | 2021-07-16 | 海信视像科技股份有限公司 | Display device |
| CN215526304U (en) * | 2021-09-28 | 2022-01-14 | 青岛智动精工电子有限公司 | Lamp panel, backlight module and display device |
| CN114759135A (en) * | 2022-04-27 | 2022-07-15 | 广州华星光电半导体显示技术有限公司 | Driving backboard and manufacturing method thereof, light-emitting substrate and manufacturing method thereof |
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