CN116413956A - Lamp panel, manufacturing method thereof, backlight module and display device - Google Patents

Lamp panel, manufacturing method thereof, backlight module and display device Download PDF

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Publication number
CN116413956A
CN116413956A CN202310484977.4A CN202310484977A CN116413956A CN 116413956 A CN116413956 A CN 116413956A CN 202310484977 A CN202310484977 A CN 202310484977A CN 116413956 A CN116413956 A CN 116413956A
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CN
China
Prior art keywords
light source
lamp panel
cup
light
base plate
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Pending
Application number
CN202310484977.4A
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Chinese (zh)
Inventor
魏明贺
杨珊珊
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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Application filed by Shanghai Tianma Microelectronics Co Ltd filed Critical Shanghai Tianma Microelectronics Co Ltd
Priority to CN202310484977.4A priority Critical patent/CN116413956A/en
Publication of CN116413956A publication Critical patent/CN116413956A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

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

Abstract

The invention provides a lamp panel, a preparation method thereof, a backlight module and a display device, wherein the lamp panel comprises a substrate, and a reflecting cup and a driving circuit for supplying power to a light source are formed on the substrate; the reflecting cup is enclosed to form a plurality of grooves, and a reflecting layer is formed on the surface of the reflecting cup; the substrate base plate and the reflecting cup are both made of glass materials; the light sources are arranged in the grooves, and two adjacent light sources are electrically connected based on the driving circuit; the invention is beneficial to weakening the halation phenomenon generated by the display panel and improving the display effect of the display panel.

Description

Lamp panel, manufacturing method thereof, backlight module and display device
Technical Field
The invention relates to the technical field of display, in particular to a lamp panel, a manufacturing method thereof, a backlight module and a display device.
Background
The backlight module is one of key components of the liquid crystal display panel, and has the functions of providing enough brightness and uniformly distributed light sources so that the backlight module can normally display images. The traditional backlight module is provided with a lamp panel, and uniform backlight is realized through light emitting diodes (light emitting diode, LEDs) distributed on the lamp panel and a light scattering structure.
Generally, the light emitting effect of the backlight module directly affects the visual effect of the liquid crystal display module, and the backlight module is divided into two types of side-in type and direct type according to the distribution positions of the light sources. The partitions of the LEDs in the direct type backlight module can be in one-to-one correspondence with the partitions of the liquid crystal glass, so that the local dimming effect is better, and the dynamic contrast of the picture of the display panel is higher.
However, in the direct type backlight module, light interference occurs between the turned-on LEDs, so that a halo phenomenon is generated on the display panel, which results in poor image display effect.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the invention and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
In view of the above, the present invention provides a lamp panel, a manufacturing method thereof, a backlight module and a display device, so as to solve the problem of poor display screen caused by halation of the display panel.
According to an aspect of the present invention, there is provided a lamp panel comprising:
a substrate base plate on which a reflection cup and a driving circuit for supplying power to the light source are formed; the reflecting cup is enclosed to form a plurality of grooves, and a reflecting layer is formed on the surface of the reflecting cup; the substrate base plate and the reflecting cup are both made of glass materials; and
the light sources are arranged in the grooves, and two adjacent light sources are electrically connected based on the driving circuit.
According to another aspect of the present invention, there is provided a method for manufacturing a lamp panel, comprising the steps of:
preparing and forming a substrate base plate and a reflecting cup; the reflecting cup is enclosed to form a plurality of grooves; the substrate base plate and the reflecting cup are both made of glass materials;
preparing and forming a driving circuit for supplying power to a light source on the substrate;
preparing a reflecting layer on the surface of the reflecting cup; and
preparing a light source in the groove; and two adjacent light sources are electrically connected based on the driving circuit.
According to another aspect of the present invention, a backlight module is provided, including any one of the above-mentioned light panels.
According to another aspect of the present invention, a display device is provided, including the above-mentioned backlight module.
Compared with the prior art, the invention has the beneficial effects that:
the lamp panel, the preparation method thereof, the backlight module and the display device are based on forming the reflecting cup by processing and forming the glass substrate, so that the problems that the accuracy of the light source opening is difficult to control and the curved surface of the wall surface of the reflecting cup is difficult to control caused by adopting the plastic substrate to process and form the reflecting cup can be avoided, various reflecting cup structures can be manufactured, the light source type can be designed for any secondary time, the halation phenomenon generated by the display panel can be reduced, and the display effect of the display panel can be improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a lamp panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a light source on a lamp panel according to an embodiment of the invention;
FIG. 3 is a schematic view of a light source on a lamp panel according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a light source on a lamp panel according to the prior art;
FIG. 5 is a schematic diagram of a structure of a bonding pad assembled on a substrate according to an embodiment of the present invention;
FIG. 6 is a schematic view of a light source according to an embodiment of the present invention after assembly;
FIG. 7 is a partial cross-sectional view of a lamp panel according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a method for manufacturing a lamp panel according to another embodiment of the present invention;
FIG. 9 is a flowchart of another method for manufacturing a lamp panel according to another embodiment of the present invention;
FIG. 10 is a flowchart of another method for manufacturing a lamp panel according to another embodiment of the present invention;
fig. 11 is a flow chart of another method for manufacturing a lamp panel according to another embodiment of the invention.
Reference numerals
11. A substrate base; 12. a reflective cup; 13. a groove; 14. a light source; 15. a bonding pad; 16. a drive line;
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a further description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
It is noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than those herein described, and those skilled in the art may readily devise numerous other arrangements that do not depart from the spirit of the invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present invention are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in the context, it will also be understood that when an element is referred to as being formed "on" or "under" another element, it can be directly formed "on" or "under" the other element or be indirectly formed "on" or "under" the other element through intervening elements.
In order that the above objects, features and advantages of the invention will be readily understood, a further description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. The words expressing the positions and directions described in the present invention are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship, and the layer thicknesses of certain portions are exaggerated in the drawing for easy understanding, and the layer thicknesses in the drawings do not represent the proportional relationship of the actual layer thicknesses. And embodiments of the invention and features of embodiments may be combined with each other without conflict. The drawings of the various embodiments in this application bear the same reference numerals.
As shown in fig. 1, 5 and 6, the embodiment of the invention discloses a lamp panel. The lamp panel includes a substrate 11 and a light source 14. Wherein the light source 14 is connected to the substrate 11 based on the bonding pad 15. A reflecting cup 12 is formed on the substrate 11, and a reflecting layer is formed on the surface of the reflecting cup 12. The reflective cup 12 can play a secondary design role on the light pattern of the light source 14, which is beneficial to weakening the halation phenomenon generated by the display panel. Referring to fig. 1, reflective cups 12 are arranged in a staggered fashion on a substrate base 11. The four intersecting reflecting cups 12 are enclosed to form a recess 13, and the light source 14 is disposed in the recess 13.
The light source 14 may be one of a Light Emitting Diode (LED) or a min-LED or a micro-LED, and the present invention is not limited to the specific type thereof. The reflecting layer can be formed by spraying, vapor deposition or printing, and the shape of the reflecting cup 12 can be set according to the needs, for example, square or rectangle; the invention is not limited in this regard.
In this embodiment, the substrate 11 and the reflective cup 12 are made of glass. Compared to the prior art in which the substrate 11 is made of plastic (such as PC polycarbonate), the embodiments of the present application can avoid the problems of water absorption, thermal expansion, high temperature aging, and low reflectivity due to material limitation.
Compared with the prior art that the substrate base plate 11 is prepared by combining a plastic material with an injection molding process or a plastic suction molding process, the embodiment of the application can avoid complex mold design and is not easy to demould; the accuracy of the opening of the light source 14 is difficult to control; the problems that the curved surface of the cup wall of the reflecting cup 12 is difficult to control and the like are solved, and the method has the advantages that the design complexity of a die is reduced, the accuracy of the opening of the light source 14 is easy to control in the preparation process, the curved surface of the cup wall of the reflecting cup 12 is easy to control and the like.
In some alternative embodiments, the reflector cup 12 and the base substrate 11 are formed based on an integral molding process. On the one hand, compared with the prior art that the reflecting cup 12 and the substrate base plate 11 are assembled together to form the lamp panel based on the assembly procedure, the problems of complex procedure, high difficulty in the attaching process of the reflecting cup 12 and the like are caused, and the embodiment can avoid the problems and has the advantages of high preparation efficiency, low difficulty and low production cost.
On the other hand, various reflecting cup structures with various shapes can be manufactured based on an integral forming process, and any secondary design of the light type of the light source 14 can be realized based on various shapes, so that the halation phenomenon generated by the display panel can be weakened, and the display effect of the display panel is improved.
Referring to fig. 2 and 3, which correspond to two different configurations of reflector cups 12, the light patterns emitted by the lamp panel light sources 14 are different. The reflecting cup body wall surface corresponding to fig. 2 is of a curved surface structure, and the reflecting cup body wall surface corresponding to fig. 3 is of a plane structure. The halation reduction effect in fig. 2 is superior to that in fig. 3.
Compared with the light type emitted by the light source 14 of the lamp panel in the prior art shown in fig. 4, the halo generated by the display panel in the embodiment of the present application is significantly smaller, so that the display effect of the display panel is improved.
In the present embodiment, the substrate 11 is formed with a driving circuit 16 for supplying power to the light source 14. Adjacent two light sources 14 on the substrate 11 are electrically connected based on the above-described drive lines 16. In particular, a channel through which the driving line 16 passes is formed in the substrate 11 by etching or the like. The channel is formed on the back surface of the substrate base plate 11. Both ends of the channel communicate with the same side of the substrate 11. The drive lines may be formed by copper plating within the vias.
Referring to fig. 5 and 6, a pad 15 is disposed in the recess 13, and the pad 15 is electrically connected to a driving circuit in the etched channel, for example, may be connected by soldering. The bonding pad 15 is also electrically connected to a pin of the light source 14. The pad 15 may be formed by solder, for example, and the pad 15 is fixedly connected to the substrate 11. Illustratively, the bonding pad 15 may be fixedly connected to the substrate base plate 11 based on a manner of solder connection. It should be noted that the material of the driving circuit is not limited to copper in the present application.
Specifically, the drive line 16 has a positive-negative electrode, the positive electrode line is connected to the pad 15 to form a positive electrode connection terminal, and the negative electrode line is connected to the pad 15 to form a negative electrode connection terminal. The positive pin of the light source 14 is connected to the positive connection terminal, and the negative pin of the light source 14 is welded to the negative connection terminal, that is, the light source 14 is electrically connected to the driving circuit 16.
When the back surface of the substrate 11 is specifically wired, all the light sources 14 can be connected in parallel or in series as required for the light sources within a certain number range, the connection between all the light sources can be completed in the same layer of glass, and the wiring of the signal lines, the data lines and the like of the lamp panel can be realized in other layers. The specific implementation of the method is not limited in this application.
It should be noted that, the two adjacent light sources shown in fig. 7 are connected based on two lines, and the two adjacent light sources may be that the positive electrode of one light source is connected to the positive electrode of the other light source, or that the positive electrode of one light source is connected to the negative electrode of the other light source, and those skilled in the art may perform wiring as required. Also, the two lines shown in fig. 7 do not necessarily represent being located in different layers of glass, but may be located in the same layer. The present application is not limited in this regard.
And in the process of connecting the light source with the driving power supply to realize that the driving power supply supplies power to the light source, the driving power supply can be arranged in an externally hung mode, namely, is independent of the lamp panel and is arranged outside the lamp panel, and is not required to be arranged in glass of the lamp panel, so that the arrangement is more flexible.
In an alternative embodiment, the light source 14 is disposed on a first side of the substrate 11, and the driving circuit 16 is formed on a second side of the substrate 11 along the thickness direction of the lamp panel. That is, referring to fig. 7, the drive line 16 is located below the curved surface of the cup wall of the reflector cup 12 and also below the light source 14. This may make etching of the above-mentioned channels less difficult. However, in other embodiments, the channels for routing the drive lines 16 may be etched into the curved surface of the cup wall. The present application is not limited in this regard.
In this embodiment, the light source 14 emits light at an angle of 140 ° -180 °, and the cross section of the outer wall of the reflective cup 12 along the direction parallel to the thickness direction of the lamp panel conforms to a bezier curve. That is, a curve formed by intersecting the cross section with the outer wall surface of the reflecting cup 12 corresponds to a Bezier curve. Referring to fig. 2, the wall surface of the reflective cup body shown in fig. 2 is a bessel curve structure, and the embodiment of the application is matched with the wall surface of the reflective cup 12 which is in a bessel curve through the light source 14 with a large light emitting angle, so that the light type of the original light source is uniformly distributed and the shrinkage effect is better, the utilization efficiency of light is improved, the halation phenomenon generated by the display panel is further weakened, and the display effect of the display panel is improved.
In this embodiment, the reflectivity of the reflective layer is greater than 90%. That is, the reflective layer in the reflective cup 12 located on the front surface of the lamp panel adopts the high-reflectivity coating, which is favorable for further weakening the halation phenomenon generated by the display panel and improving the display effect of the display panel. According to the embodiment of the application, the reflecting layer is sprayed on the reflecting cup made of glass, the coating is easier to attach, and the yellowing and ageing resistance risk of the reflecting layer is smaller, so that the service life of the reflecting cup is prolonged.
In the embodiment of the present application, the reflectivity of the reflective layer and the light emitting angle of the light source 14 are not limited, and may be set by those skilled in the art as required.
In the present embodiment, the light source 14 includes a color conversion film and a blue light chip for emitting blue light. The color conversion film is used for converting blue light emitted by the blue light chip into white light. In practice, the color conversion film may be disposed above the blue light chip. Compared with the scheme of forming the light source 14 by adopting the blue light chip and the fluorescent powder in the prior art, the embodiment of the application has the advantages of wider color gamut and lower cost.
In this embodiment, the groove 13 is filled with a light-transmitting glue for covering the light source 14, and the light source 14 and the bonding pad 15 can be protected by the light-transmitting glue, so that pollution and toxic gas are prevented from eroding the bonding pad 15, thereby being beneficial to ensuring the display effect of the display panel. In specific implementation, the light-transmitting glue fills the groove and is flush with the top of the reflecting cup.
As shown in FIG. 8, another embodiment of the present invention also discloses a method for manufacturing a lamp panel. The preparation method is used for preparing the lamp panel disclosed in any embodiment. The preparation method comprises the following steps:
s110, preparing and forming a substrate base plate and a reflecting cup. The reflecting cup is enclosed to form a plurality of grooves.
S120, preparing and forming a driving circuit for supplying power to the light source on the substrate.
S130, preparing and forming a reflecting layer on the surface of the reflecting cup.
And S140, preparing light sources in the grooves, wherein two adjacent light sources are electrically connected based on the driving circuit.
In step S110, a reflective cup may be formed on the substrate base plate based on the mold molding. The reflecting cups are arranged on the substrate in a staggered mode. Wherein, the light source can be one of a Light Emitting Diode (LED) or a min-LED or a micro-LED, and the specific type of the light source is not limited by the invention.
In step S130, the reflective layer may be formed by spraying, evaporating or printing, and the shape of the reflective cup may be set as required, for example, may be square or rectangular; the invention is not limited in this regard.
In this embodiment, the substrate and the reflective cup are made of glass. Compared with the prior art that a substrate is generally made of plastic (such as PC polycarbonate) materials, the embodiment of the application can avoid the problems of water absorption, thermal expansion, high-temperature aging and low reflectivity caused by material limitation.
Compared with the prior art that a plastic material is combined with an injection molding process or a plastic sucking molding process to prepare a substrate, the embodiment of the application can avoid complex design of a die and is not easy to demould; the accuracy of the light source opening is difficult to control; the problems that the curved surface of the cup wall of the reflecting cup is difficult to control and the like are solved, and the method has the advantages that the design complexity of a die is reduced, the accuracy of the opening of a light source is easy to control in the preparation process, the curved surface of the cup wall of the reflecting cup is easy to control and the like.
In the implementation of step S140, the light source and the driving circuit may be respectively disposed on two opposite sides of the substrate. For example, the light source is disposed on a first side of the substrate, and the driving circuit is formed on a second side of the substrate.
In this embodiment, the light source has a light emitting angle of 140 ° -180 °, and the cross section of the outer wall of the reflective cup along the direction parallel to the thickness direction of the lamp panel conforms to a bezier curve. That is, a curve formed by intersecting the cross section with the outer wall surface of the reflecting cup corresponds to a Bezier curve. According to the embodiment of the application, the light source with a large light-emitting angle is matched with the wall surface of the reflection cup with the Bezier curve, so that the halation phenomenon generated by the display panel is further weakened, and the display effect of the display panel is improved.
In this embodiment, the reflectivity of the reflective layer is greater than 90%. That is, the reflective layer in the reflective cup on the front surface of the lamp panel adopts the high-reflectivity coating, which is beneficial to further weakening the halation phenomenon generated by the display panel and improving the display effect of the display panel. According to the embodiment of the application, the reflecting layer is sprayed on the reflecting cup made of glass, the coating is easier to attach, and the yellowing and ageing resistance risk of the reflecting layer is smaller, so that the service life of the reflecting cup is prolonged.
In the embodiment of the present application, the reflectivity of the reflective layer and the light emitting angle of the light source are not limited, and may be set by a person skilled in the art according to needs.
In this embodiment, the light source includes a color conversion film and a blue light chip for emitting blue light. The color conversion film is used for converting blue light emitted by the blue light chip into white light. In practice, the color conversion film may be disposed above the blue light chip. Compared with the scheme that a blue light chip and fluorescent powder are matched to form a light source in the prior art, the embodiment of the application has the advantages of wider color gamut and lower cost.
In this embodiment, the groove is filled with the light-transmitting glue for covering the light source, and the light source and the bonding pad can be protected through the arrangement of the light-transmitting glue, so that the bonding pad is prevented from being corroded by polluted and toxic gases, and the display effect of the display panel is guaranteed. In specific implementation, the light-transmitting glue fills the groove and is flush with the top of the reflecting cup.
As shown in fig. 9, another embodiment of the present invention discloses another method for manufacturing a lamp panel. Based on the corresponding embodiment of fig. 8, the preparation method replaces step S110 with step S111: the substrate base plate and the reflecting cup are prepared and formed by adopting an integral molding process.
On the one hand, compared with the prior art that the reflecting cup and the substrate are assembled together to form the lamp panel based on the assembly process, the problems of complex process, high difficulty in the attaching process of the reflecting cup and the like are caused, and the reflecting cup structure and the substrate are integrally designed without separately designing the reflecting cup, so that the problems can be avoided, and the lamp panel has the advantages of high preparation efficiency, low difficulty and low production cost.
On the other hand, based on the integrated forming process, various reflecting cup structures can be manufactured, and the light source type can be designed for any secondary, so that the halation phenomenon generated by the display panel can be reduced, and the display effect of the display panel is improved.
As shown in fig. 10, another embodiment of the present invention discloses another method for manufacturing a lamp panel. Based on the corresponding embodiment of fig. 8, the preparation method replaces step S120 with step S121:
and preparing a channel for the driving circuit to pass through on the substrate, wherein two ends of the channel are communicated with the same side of the substrate, and the driving circuit is arranged in the channel.
In this embodiment, the step S140 includes:
s141, preparing a bonding pad in the groove; the driving circuit extends out of the substrate along the channel to be electrically connected with the bonding pad.
And S142, preparing a light source in the groove based on the bonding pad. The bonding pad is electrically connected with the pin of the light source.
In step S121, a via through which a driving line passes is formed in the base substrate by etching or the like, and then copper is laid in the via to form the driving line. . The channel is formed on the back side of the substrate. Both ends of the channel are communicated with the same side of the substrate. The method further comprises the following steps: and arranging bonding pads in the grooves. The pads are electrically connected to the drive lines and the light source, respectively, for example, by soldering. The effect diagram after the pad layout is completed can be referred to fig. 5. The layout structure of the driving circuit is shown in fig. 7.
In a specific implementation, the bonding pad may be formed based on solder, for example, and the bonding pad is fixedly connected to the substrate. The bonding pads may be fixedly connected to the substrate base plate, for example, based on a soldered connection. It should be noted that the material of the driving circuit is not limited to copper in the present application.
Specifically, the drive line has a positive-negative electrode, the positive electrode line is connected to the pad to form a positive electrode connection terminal, and the negative electrode line is connected to the pad to form a negative electrode connection terminal. The positive electrode pin of the light source is connected with the positive electrode connecting terminal, and the negative electrode pin of the light source is welded with the negative electrode connecting terminal, namely, the electric connection between the light source and the driving circuit is realized.
The light source and the channel can be respectively arranged on two opposite sides of the substrate. For example, the light source is disposed on a first side of the substrate, and the driving circuit and the channel are formed on a second side of the substrate.
As shown in fig. 11, another embodiment of the present invention discloses another method for manufacturing a lamp panel. In this embodiment, the reflective cup is located on the first side of the substrate. Based on the corresponding embodiment of fig. 8, the preparation method replaces step S120 with step S122:
and preparing and forming a driving circuit on the second side of the substrate. The second side of the substrate is opposite to the first side.
It should be noted that, all the embodiments disclosed in the present application may be freely combined, and the technical solution obtained after combination is also within the protection scope of the present application.
An embodiment of the present invention further provides a backlight module, where the backlight module includes the lamp panel described in any one of the embodiments. The detailed structural features and advantages of the lamp panel may be referred to the description of the above embodiments, and will not be repeated here. Optionally, the backlight module is a direct type backlight module that emits light vertically and upwardly.
An embodiment of the present invention further provides a display apparatus, where the display apparatus includes the backlight module described in the foregoing embodiment.
It is to be understood that the type of the display device may be any one of an Organic Light-Emitting Diode (OLED) display device, a QLED (Quantum Dot Light Emitting Diodes) display device, a micro LED (micro LED) display device, or the like, and the present invention is not particularly limited thereto.
The display device provided by the above-described embodiments may be any device that displays an image whether in motion (e.g., video) or stationary (e.g., still image) and whether textual or pictorial. More particularly, it is contemplated that the embodiments may be implemented in or associated with a variety of electronic devices. Such as, but not limited to, mobile telephones, wireless devices, personal Data Assistants (PDAs), hand-held or portable computers, GPS receivers/navigators, cameras, MP4 video players, video cameras, game consoles, wrist watches, clocks, calculators, television monitors, flat panel displays, computer monitors, auto displays (e.g., odometer display, etc.), navigators, cabin controllers and/or displays, displays of camera views (e.g., display of a rear view camera in a vehicle), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures, among others.
In summary, the lamp panel, the preparation method thereof, the backlight module and the display device provided by the invention have at least the following advantages:
the lamp panel, the manufacturing method thereof, the backlight module and the display device disclosed by the embodiment of the invention are based on forming the reflecting cup by processing the glass substrate, so that the problems that the accuracy of the light source opening is difficult to control and the curved surface of the wall surface of the reflecting cup is difficult to control caused by processing the plastic substrate into the reflecting cup can be avoided, various reflecting cup structures can be manufactured, the light source type can be designed for any secondary time, the halation phenomenon generated by the display panel can be reduced, and the display effect of the display panel can be improved.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims (18)

1. A lamp panel, comprising:
a substrate base plate on which a reflection cup and a driving circuit for supplying power to the light source are formed; the reflecting cup is enclosed to form a plurality of grooves, and a reflecting layer is formed on the surface of the reflecting cup; the substrate base plate and the reflecting cup are both made of glass materials; and
the light sources are arranged in the grooves, and two adjacent light sources are electrically connected based on the driving circuit.
2. The lamp panel of claim 1, wherein the reflector cup and the substrate base are integrally formed.
3. The lamp panel of claim 1, wherein the light source emits light at an angle of 140 ° -180 °, and wherein a cross section of an outer wall of the reflector cup along a thickness direction of the lamp panel conforms to a bezier curve.
4. The lamp panel of claim 1, wherein the light source comprises a color conversion film and a blue light chip for emitting blue light, the color conversion film being for converting the blue light emitted from the blue light chip into white light.
5. The lamp panel of claim 1, wherein the reflective layer has a reflectivity of greater than 90%.
6. The lamp panel according to claim 1, wherein a bonding pad is arranged in the groove, the substrate base plate is provided with a channel for the driving circuit to pass through, and two ends of the channel are communicated with the same side of the substrate base plate; the driving circuit extends out of the substrate base plate along the channel so as to be electrically connected with the bonding pad; and the bonding pad is electrically connected with a pin of the light source.
7. The lamp panel of claim 1, wherein the recess is filled with a light transmissive glue, the light transmissive glue covering the light source.
8. The preparation method of the lamp panel is characterized by comprising the following steps:
preparing and forming a substrate base plate and a reflecting cup; the reflecting cup is enclosed to form a plurality of grooves; the substrate base plate and the reflecting cup are both made of glass materials;
preparing and forming a driving circuit for supplying power to a light source on the substrate;
preparing a reflecting layer on the surface of the reflecting cup; and
preparing a light source in the groove; and two adjacent light sources are electrically connected based on the driving circuit.
9. The method of manufacturing of claim 8, wherein the manufacturing forms a substrate base plate and a reflective cup, comprising:
the substrate base plate and the reflecting cup are prepared and formed based on an integral molding process.
10. The method of claim 8, wherein the light source emits light at an angle of 140 ° -180 °, and wherein the cross section of the outer wall of the reflector cup along the thickness direction of the lamp panel conforms to a bezier curve.
11. The method of manufacturing according to claim 8, wherein the light source includes a color conversion film for converting blue light emitted from the blue light chip into white light, and a blue light chip for emitting blue light.
12. The method of manufacturing of claim 8, wherein the reflectivity of the reflective layer is greater than 90%.
13. The method of manufacturing according to claim 8, wherein the manufacturing of the driving circuit for supplying power to the light source on the substrate includes:
preparing a channel for the driving circuit to pass through on the substrate, wherein two ends of the channel are communicated with the same side of the substrate;
the preparing a light source in the groove comprises the following steps:
preparing a bonding pad in the groove; the driving circuit extends out of the substrate base plate along the channel so as to be electrically connected with the bonding pad;
preparing a light source in the groove based on the bonding pad; the bonding pad is electrically connected with a pin of the light source.
14. The method of manufacturing of claim 8, wherein the reflective cup is located on a first side of the substrate base; the preparation and formation of the driving circuit for supplying power to the light source on the substrate base plate comprises the following steps:
preparing and forming a driving circuit on the second side of the substrate base plate; the second side of the substrate base plate is opposite to the first side.
15. The method of claim 8, wherein forming a reflective layer on the surface of the reflective cup comprises:
and preparing and forming a reflecting layer on the surface of the reflecting cup through an evaporation process.
16. A backlight module comprising a lamp panel according to any one of claims 1-7.
17. The backlight module of claim 16, wherein the backlight module is a direct type backlight module that emits light vertically upward.
18. A display device comprising a backlight module according to any one of claims 16-17.
CN202310484977.4A 2023-04-28 2023-04-28 Lamp panel, manufacturing method thereof, backlight module and display device Pending CN116413956A (en)

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Application Number Priority Date Filing Date Title
CN202310484977.4A CN116413956A (en) 2023-04-28 2023-04-28 Lamp panel, manufacturing method thereof, backlight module and display device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117954564A (en) * 2024-03-26 2024-04-30 深圳市佑明光电有限公司 Mini LED backlight module without halation and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117954564A (en) * 2024-03-26 2024-04-30 深圳市佑明光电有限公司 Mini LED backlight module without halation and preparation method thereof

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