CN109375423B - Backlight plate, display screen, electronic product and manufacturing method of backlight plate - Google Patents
Backlight plate, display screen, electronic product and manufacturing method of backlight plate Download PDFInfo
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- CN109375423B CN109375423B CN201811598617.2A CN201811598617A CN109375423B CN 109375423 B CN109375423 B CN 109375423B CN 201811598617 A CN201811598617 A CN 201811598617A CN 109375423 B CN109375423 B CN 109375423B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The embodiment of the invention relates to the field of electronic products, and discloses a backlight plate, a display screen, an electronic product and a manufacturing method of the backlight plate, wherein the backlight plate comprises the following components: the board body in a poor light, the board in a poor light still includes: a flexible light diffusing layer; the flexible light diffusion layer is arranged on one side of the backlight plate body far away from the display layer. Because the flexible light diffusion layer sets up the one side of keeping away from the display layer at the board body in a poor light, that is to say, the flexible light diffusion layer sets up the one side at the board body in a poor light towards the preceding shell bottom, consequently, when the shell bottom contact of flexible light diffusion layer and preceding shell, because the flexible light diffusion layer material is softer, when the shell bottom of preceding shell is used on the flexible light diffusion layer, can lead to flexible light diffusion layer damage, and present white spot class damage spot, if present the white spot on the flexible light diffusion layer consequently, it has received mechanical damage to show the display screen, if the not damaged, it probably is that the display screen material has a problem to show, through above-mentioned judgment method, thereby can reduce the degree of difficulty of display screen inspection correction.
Description
Technical Field
The embodiment of the invention relates to the field of electronic products, in particular to a backlight plate, a display screen, an electronic product and a manufacturing method of the backlight plate.
Background
The display screen is a display tool which displays certain electronic files on the screen through a specific transmission device and reflects the electronic files to human eyes.
The display screen generally comprises a backlight plate and a liquid crystal glass plate arranged on the backlight plate, light of a light source is reflected to the liquid crystal glass plate through the backlight plate, so that the liquid crystal glass plate displays pictures required to be displayed, the display screen is generally arranged on a front shell of an electronic product, a certain gap exists between the display screen and the shell bottom of the front shell, the display screen is pressed towards the shell bottom of the front shell to damage the display screen due to external impact in the production, manufacturing and using processes of the electronic product, or the internal material problem of the display screen causes the defects of white spots, dark spots and the like on the display screen, when a research and development personnel inspects the display screen, the display screen is only slightly impacted externally, so that the research and development personnel can hardly judge whether the white spots or the dark spots on the display screen are caused by mechanical damage or the internal material defect of the display screen, thereby causing great difficulty in the verification and correction of the display screen.
Disclosure of Invention
The embodiment of the invention aims to provide a backlight plate, a display screen, an electronic product and a manufacturing method of the backlight plate, so that the display screen can be identified in time once colliding with the shell bottom of a front shell, and the difficulty in checking and correcting the display screen is reduced.
In order to solve the above technical problem, an embodiment of the present invention provides a backlight panel disposed below a display layer of a display screen, the backlight panel including: the board body in a poor light, the board in a poor light still includes: a flexible light diffusing layer; the flexible light diffusion layer is arranged on one side, far away from the display layer, of the backlight plate body.
Compared with the prior art, the backlight plate of the embodiment of the invention further comprises: the flexible light diffusion layer is arranged on one side of the backlight plate body far away from the display layer, namely the flexible light diffusion layer is arranged on one side of the backlight plate body facing the front shell bottom, so when the display screen is pressed to the front shell bottom under the action of external impact, the flexible light diffusion layer is contacted with the shell bottom of the front shell, the flexible light diffusion layer is soft in material, when the shell bottom of the front shell acts on the flexible light diffusion layer, the flexible light diffusion layer is damaged, and white spot damage spots are presented, therefore, when a research and development worker unpacks the display screen, the back of the display screen is only checked, if the flexible light diffusion layer presents a white spot display uneven shape, the display screen is mechanically damaged, if the flexible light diffusion layer is not damaged, the display screen is damaged possibly due to the internal defects of the display screen, through the judging method, therefore, specific problems in the design process can be judged, for example, reasons such as unreasonable structural design or problems of the display screen material and the like, and targeted improvement design is carried out.
In addition, the flexible light diffusion layer is a light diffusion agent containing light diffusion particles and coated on the backlight plate body.
The light diffusion particles are any one of titanium dioxide particles, barium sulfate particles, silica particles, cerium dioxide particles, calcium carbonate particles, alumina particles, glass bead particle layers, and silicone bead particles.
In addition, the flexible light diffusion layer is a flexible light diffusion plate which is adhered to the backlight plate body.
In addition, the thickness of the diffusion particle layer is 0.05mm-0.1 mm.
In addition, the backlight plate body includes: an upper brightness enhancement film, a lower brightness enhancement film, a diffusion sheet, a light guide plate and a reflection sheet which are arranged from top to bottom in sequence; the flexible light diffusion layer is arranged on one side, far away from the light guide plate, of the reflection sheet.
In addition, the present invention also provides a display screen, which includes:
a display layer;
the backlight plate is arranged below the display layer.
Because the backlight plate also includes: the flexible light diffusion layer is arranged on one side of the backlight plate body far away from the display layer, namely the flexible light diffusion layer is arranged on one side of the backlight plate body facing the front shell bottom, so when the display screen is pressed to the front shell bottom under the action of external impact, the flexible light diffusion layer is contacted with the shell bottom of the front shell, the flexible light diffusion layer is soft in material, when the shell bottom of the front shell acts on the flexible light diffusion layer, the flexible light diffusion layer is damaged, and white spot damage spots are presented, therefore, when a research and development worker unpacks the display screen, the back of the display screen is only checked, if the flexible light diffusion layer presents a white spot display uneven shape, the display screen is mechanically damaged, if the flexible light diffusion layer is not damaged, the display screen is damaged possibly due to the internal defects of the display screen, through the judging method, therefore, specific problems in the design process can be judged, for example, reasons such as unreasonable structural design or problems of the display screen material and the like, and targeted improvement design is carried out.
In addition, the present invention also provides an electronic product, comprising: the display screen is arranged in the shell, and the flexible light diffusion layer arranged on the backlight plate body faces to the shell bottom of the shell and is separated from the shell bottom of the shell.
Because the backlight plate also includes: the flexible light diffusion layer is arranged on one side of the backlight plate body far away from the display layer, namely the flexible light diffusion layer is arranged on one side of the backlight plate body facing the front shell bottom, so when the display screen is pressed to the front shell bottom under the action of external impact, the flexible light diffusion layer is contacted with the shell bottom of the front shell, the flexible light diffusion layer is soft in material, when the shell bottom of the front shell acts on the flexible light diffusion layer, the flexible light diffusion layer is damaged, and white spot damage spots are presented, therefore, when a research and development worker unpacks the display screen, the back of the display screen is only checked, if the flexible light diffusion layer presents a white spot display uneven shape, the display screen is mechanically damaged, if the flexible light diffusion layer is not damaged, the display screen is damaged possibly due to the internal defects of the display screen, through the judging method, therefore, specific problems in the design process can be judged, for example, reasons such as unreasonable structural design or problems of the display screen material and the like, and targeted improvement design is carried out.
In addition, the invention also provides a manufacturing method of the backlight plate, which comprises the following specific steps:
providing a backlight plate body;
and arranging a flexible light diffusion layer on one side of the backlight plate body, which is far away from the side for stacking the display layers, and fixing the light diffusion layer and the backlight plate body.
Because the backlight board body is provided with the flexible light diffusion layer at the side far away from the side for stacking the display layers, namely the flexible light diffusion layer is arranged at the side of the backlight board body facing the shell bottom of the front shell, when the display screen is pressed to the shell bottom of the front shell under the action of external impact, the flexible light diffusion layer is contacted with the shell bottom of the front shell, because the flexible light diffusion layer is made of softer material, when the shell bottom of the front shell acts on the flexible light diffusion layer, the flexible light diffusion layer is damaged, and white spot type damage spots are presented, therefore, when a research and development worker takes apart the display screen, only the back of the display screen needs to be checked, if the flexible light diffusion layer presents a white spot type display uneven shape, the display screen is mechanically damaged, if the flexible light diffusion layer is not damaged, the display screen is damaged possibly caused by the internal defects of the display screen, through the judging method, therefore, specific problems in the design process can be judged, for example, reasons such as unreasonable structural design or problems of the display screen material and the like, and targeted improvement design is carried out.
In addition, the flexible light diffusion layer is fixed on the backlight plate body in the following mode;
the flexible light diffusion layer is a light diffusion agent containing light diffusion particles, and the light diffusion agent is sprayed on the backlight plate body in a spraying mode;
or the flexible light diffusion layer is a flexible light diffusion plate, and the flexible light diffusion plate is bonded on the backlight plate body in a bonding mode.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a schematic structural diagram of a backlight panel according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a display panel according to a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an electronic product according to a third embodiment of the invention;
fig. 4 is a flowchart of a method for manufacturing a backlight plate according to a fourth embodiment of the present invention.
Description of reference numerals:
1. a backlight plate; 11. a backlight plate body; 111. an upper brightness enhancement film; 112. a lower brightness enhancement film; 113. a diffusion sheet; 114. a light guide plate; 115. a reflective sheet; 12. a flexible light diffusing layer; 2. a display layer; 3. a display screen; 41. a front housing; 411. a groove; 412. a step; 413. a shell bottom; 414. a gap; 42. a rear housing; 43. a cavity.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a backlight panel, and particularly, as shown in fig. 1, the backlight panel includes: the backlight plate comprises a backlight plate body 11 and a flexible light diffusion layer 12, wherein the flexible light diffusion layer 12 is arranged on one side of the backlight plate body 11 far away from the display layer 2.
Because the backlight plate also includes: a flexible light diffusion layer 12, and the flexible light diffusion layer 12 is disposed on the side of the backlight body 11 far from the display layer 2, that is, the flexible light diffusion layer 12 is disposed on the side of the backlight body 11 facing the casing bottom 413 of the front casing 41, so that when the display screen 3 is pressed against the casing bottom 413 of the front casing 41 by an external impact, the flexible light diffusion layer 12 is in contact with the casing bottom 413 of the front casing 41, since the flexible light diffusion layer 12 itself is soft, when the casing bottom 413 of the front casing 41 is applied to the flexible light diffusion layer 12, the flexible light diffusion layer 12 is damaged, and white spot damage spots are present, so that when a developer detaches the display screen 3, the developer only checks the back of the display screen 3, if the flexible light diffusion layer 12 presents a white spot display uneven shape, the display screen 3 is mechanically damaged, and if the flexible light diffusion layer 12 is not damaged, the display screen 3 may be damaged due to an internal defect of the display screen 3, by the judging method, specific problems in the design process can be judged, such as unreasonable structural design and the like, so that targeted improved design is performed.
Specifically, flexible light diffusion particle layer is for coating the light diffusant that contains the light diffusion particle on backlight body 11, and in actual conditions, when the light diffusion particle sprays on backlight body 11, light diffusion particle layer surface presents even haze form, because the light diffusion particle is generally softer, in case receive the damage, the impaired place of light diffusion particle layer can present white spot type and show uneven form and come out to make the research and development personnel just can judge whether this backlight has taken place to touch with the shell bottom 413 of preceding shell 41 at a glance.
If the research and development personnel judge that the damage is caused by the collision between the shell bottom 413 of the front shell 41 and the backlight plate, the problem can be solved by changing the structure of the shell and increasing the gap 414 between the shell and the backlight plate, if the light diffusion particles are not damaged, the research and development personnel can judge the damage caused by the internal structure problem of the display screen 3, and therefore the problem can be conveniently and quickly analyzed.
In addition, it should be noted that, in the conventional electronic product processing process, the light diffusing agent is generally widely used in electronic products as a product for increasing light scattering and transmission, for example, the diffusing sheet 113 in the backlight plate is used, so the light diffusing agent is a raw material for manufacturing the backlight plate, when manufacturing the backlight plate in this embodiment, only the light diffusing agent raw material needs to be coated on the back of the backlight plate body 11, and in the manufacturing process, the light diffusing agent does not need to be purchased additionally, so the manufacturing difficulty of the backlight plate can be reduced.
In addition, in practical cases, the flexible light diffusion layer 12 may be a flexible light diffusion plate bonded to the backlight body 11, in addition to the light diffusion agent containing light diffusion particles coated on the backlight body 11. Specifically, the flexible light diffusion layer 12 includes: the side of the substrate, which is far away from the light diffusion particles, can be glued to the side of the backlight plate body 11, which is far away from the display layer 2. That is, the light diffusing agent is disposed toward the case bottom 413 of the front case 41, and specifically, the substrate may be a flexible plastic film.
Specifically, the light diffusing particles may be any of titanium dioxide particles, barium sulfate particles, silica particles, cerium dioxide particles, calcium carbonate particles, alumina particles, glass bead particle layers, and silicone bead particles.
And the thickness of the diffusion particle layer is 0.05mm-0.1 mm.
Specifically, as shown in fig. 1, the backlight body 11 includes: an upper brightness enhancement film 111, a lower brightness enhancement film 112, a diffusion sheet 113, a light guide plate 114 and a reflection sheet 115 which are arranged in sequence from top to bottom; the flexible light diffusion layer 12 is disposed on a side of the reflective sheet 115 away from the light guide plate 114.
The reflector 115 is used for reflecting light from the light source to the light guide plate 114, the light guide plate is used for transmitting the light reflected by the reflector 115 to the diffusion plate 113, and the light guide plate is made of PMMA or nano particle reinforced PMMA plastic. PMMA has high light transmittance, but its surface hardness is insufficient, heat resistance is poor, and abrasion of the surface is likely to occur. The inventors then tried to introduce inorganic particles into the interior of PMMA during in situ polymerization to improve the heat resistance and surface properties of PMMA materials.
The diffusion sheet 113 is made of high-performance PS plastic, the diffusion sheet 113 serves to diffuse the light transmitted from the light guide plate 114 to the diffusion sheet 113, and the upper and lower brightness enhancement films 111 and 112 serve to enhance the light diffused by the diffusion sheet 113.
In practical cases, the diffusion sheet 113 generally includes a light diffusing agent, and the light diffusing agent can diffuse light, specifically, the light diffusing agent is any one of titanium dioxide, barium sulfate, silicon dioxide, cerium dioxide, calcium carbonate, aluminum oxide, glass beads, silicone microspheres, or ceria composite microspheres.
Since the light diffusing agent on the diffusion sheet 113 is the same as the light diffusing agent sprayed on the reflection sheet 115, it is not necessary to purchase an additional light diffusing agent in the process of manufacturing the backlight plate, so that the difficulty of manufacturing the backlight plate can be reduced.
In addition, in the present embodiment, the preparation process of the high-performance PS plastic is specifically as follows: PS and a light diffusant are mixed according to the weight ratio of 1: (0.005-0.008), fully mixing, adding into a double-screw extruder through a feeding port, extruding, cooling and cutting into particles by a cutter; the specific process for processing the double-screw extruder comprises the following steps: the temperature of the first section is 140-145 ℃, the temperature of the second section is 160-165 ℃, the temperature of the third section is 170-175 ℃, the temperature of the fourth section is 165-170 ℃, and the rotating speed is 30-80 revolutions per minute. The light diffusant is any one of titanium dioxide, barium sulfate, silicon dioxide, cerium dioxide, calcium carbonate, aluminum oxide, glass microspheres, organic silicon microspheres or cerium dioxide composite microspheres.
The second embodiment of the present invention relates to a display screen, and specifically, as shown in fig. 2, the display screen includes: the backlight plate 1 of the first embodiment is provided with a display layer 2, wherein the backlight plate 1 is arranged below the display layer 2, and a flexible light diffusion layer 12 is arranged on one side of the backlight plate body 11 far away from the display layer 2. Specifically, the display layer 2 is a liquid crystal glass plate, and the backlight plate 1 is fixedly connected with the liquid crystal glass plate.
Since the backlight panel 1 further includes: a flexible light diffusion layer 12, and the flexible light diffusion layer 12 is disposed on the side of the backlight body 11 far from the display layer 2, that is, the flexible light diffusion layer 12 is disposed on the side of the backlight body 11 facing the shell bottom 413 of the front shell 41, so that when the display screen is pressed against the shell bottom 413 of the front shell 41 under the action of external impact, the flexible light diffusion layer 12 contacts with the shell bottom 413 of the front shell 41, since the flexible light diffusion layer 12 is soft, when the shell bottom 413 of the front shell 41 acts on the flexible light diffusion layer 12, the flexible light diffusion layer 12 is damaged, and white spot damage spots are present, therefore, when a developer detaches the display screen, the developer only checks the back of the display screen, if the flexible light diffusion layer 12 presents a white spot display uneven shape, the display screen is mechanically damaged, and if the flexible light diffusion layer 12 is not damaged, the display screen may be damaged due to internal defects of the display screen, by the judging method, specific problems in the design process, such as unreasonable structural design and the like, can be conveniently judged, and targeted improved design is further performed.
A third embodiment of the present invention relates to an electronic product, as shown in fig. 3, including: the backlight module comprises a shell and a display screen 3 arranged in the shell in a second embodiment, wherein a flexible light diffusion layer 12 arranged on the backlight plate body 11 is arranged towards a shell bottom 413 of the shell and is separated from the shell bottom 413 of the shell, and in the embodiment, the electronic product is a mobile terminal such as a mobile phone, a tablet personal computer and a translator.
Specifically, the housing includes: preceding shell 41 and backshell 42, preceding shell 41 and backshell 42 fixed connection back, form a cavity 43 between preceding shell 41 and backshell 42, spare parts such as the mainboard of electronic product set up in this cavity 43, and wherein, display screen 3 sets up on the preceding shell 41 of casing, and display screen 3 includes: display layer 2 and with display layer 2 fixed connection's backlight 1, specifically, this display layer 2 is the liquid crystal glazing board, as shown in the figure, preceding shell 41 is sunken towards backshell 42 direction, form a recess 411, wherein, the bottom of recess 411 is the shell bottom 413 of preceding shell 41, form a step 412 on the cell wall of preceding shell 41, wherein, the liquid crystal glazing board of display screen 3 places on this step 412, because backlight 1 and liquid crystal glazing board fixed connection, when the liquid crystal glazing board is fixed on the step 412 of preceding shell 41, the liquid crystal glazing board will be fixed backlight 1 for backlight 1 separates each other with the shell bottom 413 of preceding shell 41 and forms a clearance 414.
A fourth embodiment of the present invention relates to a method for manufacturing a backlight plate, as shown in fig. 4, the method includes the following steps:
providing a backlight plate body;
and arranging a flexible light diffusion layer on one side of the backlight plate body, which is far away from the side for stacking the display layers, and fixing the light diffusion layer and the backlight plate body.
The flexible light diffusion layer is fixed on the backlight plate body in the following mode;
the flexible light diffusion layer is a light diffusion agent containing light diffusion particles, and the light diffusion agent is sprayed on the backlight plate body in a spraying mode;
or the flexible light diffusion layer is a flexible light diffusion plate, and the flexible light diffusion plate is bonded on the backlight plate body in a bonding mode.
Specifically, the flexible light diffusion plate can be manufactured by firstly providing a substrate, then spraying the light diffusion agent on any one side of the substrate, obtaining the light diffusion plate after the spraying is finished, and then gluing one side of the light diffusion plate, which is far away from the light diffusion agent, of the backlight plate body by using glue water to the side of the backlight plate body, which is far away from the side for stacking the display layers.
Since the first and second embodiments correspond to the present embodiment, the present embodiment can be implemented in cooperation with the first and second embodiments. The related technical details mentioned in the first embodiment and the second embodiment are still valid in the present embodiment, and the technical effects that can be achieved in the first embodiment and the second embodiment can also be achieved in the present embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment and the second embodiment.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (8)
1. A backlight panel disposed below a display layer of a display screen, the backlight panel comprising: the board body in a poor light, its characterized in that, the board in a poor light still includes: a flexible light diffusing layer; the flexible light diffusion layer is arranged on one side of the backlight plate body, which is far away from the display layer;
the flexible light diffusion layer is a light diffusion agent containing light diffusion particles and coated on the backlight plate body, or the flexible light diffusion layer comprises a substrate and a light diffusion agent containing the light diffusion particles and coated on the substrate, and one side of the substrate, which is far away from the light diffusion particles, is bonded to one side of the backlight plate body, which is far away from the display layer.
2. The backlight according to claim 1, wherein the light diffusion particles are any one of titanium dioxide particles, barium sulfate particles, silica particles, ceria particles, calcium carbonate particles, alumina particles, glass bead particle layers, and silicone bead particles.
3. The backlight panel according to claim 1 or 2, wherein the diffusion particle layer has a thickness of 0.05mm to 0.1 mm.
4. The backlight of claim 1, wherein the backlight body comprises: an upper brightness enhancement film, a lower brightness enhancement film, a diffusion sheet, a light guide plate and a reflection sheet which are arranged from top to bottom in sequence; the flexible light diffusion layer is arranged on one side, far away from the light guide plate, of the reflection sheet.
5. A display screen, comprising:
a display layer;
the backlight panel of any one of claims 1 to 4 disposed below the display layer.
6. An electronic product, comprising: the casing, its characterized in that still includes: the display screen of claim 5 disposed within the housing, and the flexible light diffusing layer disposed on the backlight body is disposed toward and spaced apart from a bottom of the housing.
7. A method for manufacturing a backlight plate, which is used for manufacturing the backlight plate as claimed in any one of claims 1 to 4, and is characterized by comprising the following specific steps:
providing a backlight plate body;
and arranging a flexible light diffusion layer on one side of the backlight plate body, which is far away from the side for stacking the display layers, and fixing the light diffusion layer and the backlight plate body.
8. The method of claim 7, wherein the flexible light diffusion layer is fixed to the backlight body in the following manner;
the flexible light diffusion layer is a light diffusion agent containing light diffusion particles, and the light diffusion agent is sprayed on the backlight plate body in a spraying mode;
or the flexible light diffusion layer is a flexible light diffusion plate, and the flexible light diffusion plate is bonded on the backlight plate body in a bonding mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811598617.2A CN109375423B (en) | 2018-12-26 | 2018-12-26 | Backlight plate, display screen, electronic product and manufacturing method of backlight plate |
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| CN201811598617.2A CN109375423B (en) | 2018-12-26 | 2018-12-26 | Backlight plate, display screen, electronic product and manufacturing method of backlight plate |
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| CN109375423B true CN109375423B (en) | 2022-02-22 |
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| CN109375423A (en) | 2019-02-22 |
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