CN114791647A - Light guide plate and preparation process thereof, lateral-entry backlight module and display device - Google Patents
Light guide plate and preparation process thereof, lateral-entry backlight module and display device Download PDFInfo
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- CN114791647A CN114791647A CN202210457211.2A CN202210457211A CN114791647A CN 114791647 A CN114791647 A CN 114791647A CN 202210457211 A CN202210457211 A CN 202210457211A CN 114791647 A CN114791647 A CN 114791647A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 7
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- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
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- 238000001746 injection moulding Methods 0.000 claims description 4
- 238000007639 printing Methods 0.000 abstract description 9
- 235000009537 plain noodles Nutrition 0.000 description 12
- 230000003287 optical effect Effects 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
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- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
-
- 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
Abstract
The invention discloses a light guide plate and a preparation process thereof, a side-in type backlight module and a display device; at least one side surface of the light guide plate is a light incident surface, the bottom surface of the light guide plate is provided with a plurality of grooves, and the grooves are sequentially arranged at intervals along a direction vertical to the light incident surface; all be provided with the printing ink layer in every recess, the printing ink layer is laminated with the bottom that corresponds the recess mutually, the printing ink layer is the curved surface with the contact surface that corresponds the recess to increased effective printing ink face, promoted the light-emitting efficiency of light guide plate.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to a light guide plate, a side-in type backlight module and a display device.
Background
For the side-in type backlight module, the LED light sources are arranged on one side or two opposite sides of the light guide plate, light energy emitted by the LED light sources enters the light guide plate from the side face of the light guide plate, and the light energy is regularly transmitted in the light guide plate; the light guide plate is an optically dense medium with respect to air, and some light is totally reflected inside the light guide plate and does not exit from the top surface (light exit surface) of the light guide plate. In order to make as much light as possible to be emitted from the light-emitting surface of the light guide plate to convert the LED light source into a surface light source, in the prior art, an ink dot structure is screen-printed on the bottom surface of the light guide plate, and the total reflection inside the light guide plate is destroyed by the ink dot structure.
However, since the ink dot structure is disposed outside the bottom surface of the light guide plate, the contact surface between the ink dot structure and the light guide plate is a plane, that is, the maximum effective ink area of the ink dot structure is the area of the plane contacting the light guide plate, which results in a limited effective ink area, and the light extraction efficiency of the light guide plate is still greatly limited.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The present invention provides a light guide plate, a side-in backlight module and a display device to solve the above-mentioned problems, and aims to improve the light-emitting efficiency of the light guide plate.
The technical scheme adopted by the invention for solving the technical problem is as follows:
at least one side surface of the light guide plate is a light incident surface, wherein the bottom surface of the light guide plate is provided with a plurality of grooves which are sequentially arranged at intervals along a direction vertical to the light incident surface; an ink layer is arranged in each groove and is attached to the bottom of the corresponding groove.
The longitudinal section of each groove of the light guide plate is arc-shaped.
The light guide plate is characterized in that the longitudinal section of each groove is semicircular.
The light guide plate, wherein, the degree of depth of a plurality of recesses increases progressively along keeping away from the direction of going into the plain noodles.
And a gap is formed between two ends of each groove and the edge of the bottom surface of the light guide plate.
The ink layer comprises synthetic resin, SiO2/TiO 2/PMMA/nylon and a diluent.
The outer surface of the ink layer is flush with the bottom surface of the light guide plate.
A preparation process of a light guide plate comprises the following steps:
forming a plurality of grooves on the bottom surface of the light guide plate based on a CNC (computerized numerical control) or mold injection molding mode, wherein the plurality of grooves are sequentially arranged at intervals along the light incident direction;
and arranging an ink layer in each groove, and curing the ink layer.
A side-in backlight module comprises a light source and the light guide plate, wherein the light source is distributed on one side/two opposite sides of the light guide plate.
A display device comprises the lateral entrance type backlight module.
Has the beneficial effects that: at least one side surface of the light guide plate is a light incident surface, the bottom surface of the light guide plate is provided with a plurality of grooves, and the grooves are sequentially arranged at intervals along a direction vertical to the light incident surface; an ink layer is arranged in each groove and is attached to the bottom of the corresponding groove. The recess is to the sunken formation in inside of light guide plate makes the printing ink layer is the curved surface with the contact surface of recess to increased effective printing ink face, promoted the light-emitting efficiency of light guide plate.
Drawings
FIG. 1 is a schematic view of the optical principle of the light guide plate according to the present invention;
FIG. 2 is a first view of the arrangement of the grooves on the bottom surface of the light guide plate according to the present invention;
FIG. 3 is a second view of the arrangement of the grooves on the bottom surface of the light guide plate according to the present invention;
FIG. 4 is a schematic diagram of a side-in type backlight module in the prior art;
FIG. 5 is a schematic diagram of the optical principle of the single-sided light-incident light guide plate according to the present invention;
FIG. 6 is a graph showing the sectional diameter variation of the grooves of the single-sided light guide plate according to the present invention;
FIG. 7 is a schematic diagram illustrating the optical principle of the double-sided light-incident light guide plate according to the present invention;
FIG. 8 is a graph showing the variation of the cross-sectional diameter of the grooves of the double-sided light-incident light guide plate according to the present invention;
FIG. 9 is a flow chart of a process for manufacturing a light guide plate according to the present invention;
FIG. 10 is a schematic structural view of the side-entry backlight module of the present invention;
fig. 11 is a schematic view of the structure of the display device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is found through research that, as shown in fig. 1, when light enters the light guide plate from one side surface thereof, the light is regularly transmitted inside the light guide plate, and when the light is transmitted from the inside of the light guide plate to an air interface, reflection and refraction phenomena occur; the refractive index N1 of the light guide plate is about 1.5, the refractive index N of air is 1, the light guide plate is represented as an optically dense medium relative to air, and the critical angle c of the light guide plate can be calculated by the following formula:
that is, when the incident angle a of the medium surface is greater than 41.8 °, the emergent light energy does not exist, and the part of the light energy is totally reflected inside the light guide plate.
Therefore, the invention provides a light guide plate, which is provided with a light emitting surface 1, a bottom surface and four side surfaces, wherein the bottom surface is opposite to the light emitting surface 1, at least one side surface of the light guide plate is a light incident surface 3, and the bottom surface and the light emitting surface 1 are both adjacent to the light incident surface 3; when only one side surface of the light guide plate is the light incident surface 3, namely, the light source is arranged on only one side of the light guide plate, the light guide plate is a single-side light incident type light guide plate; when two opposite side surfaces of the light guide plate are light incident surfaces, namely, light sources are arranged on two opposite sides of the light guide plate, the light guide plate is a double-side light incident type light guide plate.
As shown in fig. 2 and 3, the bottom surface is provided with a plurality of grooves 4, the plurality of grooves 4 are sequentially arranged at intervals, and the arrangement direction of the plurality of grooves 4 is perpendicular to the light incident surface 3; an ink layer 5 is arranged in each groove 4, and the ink layer 5 is attached to the bottom of the corresponding groove 4.
According to the invention, the bottom surface is provided with the plurality of grooves 4, and the grooves 4 are filled with the ink layers 5, so that the effective ink contact surface between the ink layers 5 and the corresponding grooves 4 can disturb the light energy transmission order in the light guide plate, and light energy can be strongly scattered on the surfaces of the grooves 4, so that more light energy can be emitted from the light emitting surface 1 by breaking total reflection.
Compared with a planar effective ink surface (shown in figure 4) formed by screen printing of ink dots on the bottom surface of the light guide plate in the existing side-entry backlight module, the groove 4 is formed by sinking towards the inside of the light guide plate, so that the contact surface between the ink layer 5 and the groove 4 is a curved surface, the effective ink surface is increased, and the light extraction efficiency of the light guide plate is improved.
Further, the structure of the groove 4 in the invention satisfies: the width of the groove 4 is less than or equal to 0.1mm and less than 0.4 mm. In the prior art, the ink dot structure on the bottom surface of the light guide plate is transferred to the bottom surface of the light guide plate by screen printing, so that the development period is long, the production efficiency is low, and the service life of the screen is short; and because the printing ink net points are restricted by the process precision, the diameter of the printing ink net points can only be 0.4mm at minimum. The groove 4 structure is processed by a CNC (computer Numerical Control) Machine tool or injection molding by a mold, the manufacturing process is efficient, screen printing is not needed, the minimum width of the groove 4 can reach 0.1mm, and the more refined optical design is facilitated.
The ink layer 5 fills the whole corresponding groove 4, i.e. the ink layer 5 covers the bottom of the corresponding groove 4 completely. In an embodiment of the present invention, the concave direction of the grooves 4 is perpendicular to the incident direction of the light along the light incident surface 3, and the longitudinal section of each groove 4 is arc-shaped, so that the contact surface of the ink layer 5 and the entire bottom of the groove 4 is the effective ink surface 10, as shown in fig. 1.
On the premise that other conditions are not changed, as shown in fig. 1 and fig. 2, the cross-sectional diameter Φ of the groove 4, the distance L (the distance between the center lines of two adjacent grooves 4) and as shown in fig. 3, the length W of the groove 4 is an important design parameter affecting the light energy distribution of the light emitting surface 1, and in the same area range, the larger the cross-sectional diameter Φ of the groove 4, the smaller the distance L of the groove 4 and the larger the length W of the groove 4, the larger the effective area S filled with ink is pi (Φ/2) W, the higher the light energy scattering degree of the corresponding area inside the light guide plate is, and the higher the light emitting efficiency of the corresponding light emitting surface 1 area is. Therefore, in a specific implementation manner of the present embodiment, the longitudinal section of each groove 4 is semicircular. Compared with the grooves 4 with other shapes, the ink layer 5 is filled in the arc-shaped groove 4, so that the effective ink surface can reach the maximum undoubtedly, and the light-emitting rate of the light guide plate is optimal. In one embodiment of the present invention, the distance L is not less than 0.05 mm.
In the invention, the distance L between any two adjacent grooves 4 can be equal or unequal; specifically, the distance between the grooves 4 can be adjusted according to the external dimension of the light guide plate, so that the effective ink surface distribution density is adjusted, and different light energy emitting effects are achieved.
Light energy is followed income plain noodles 3 to when the inside of light guide plate is incited, at first can be close to the reflection of the effective printing ink face of income plain noodles 3, consequently if be close to the degree of depth of the recess 4 of income plain noodles 3 is too big, can lead to partial light directly to go into 3 direction reflections of plain noodles, to keeping away from the light of 3 direction outgoing of income plain noodles reduces, and then leads to being close to on the play plain noodles 1 go up to go into 3 departments of plain noodles bright, keep away from on the play plain noodles 1 go into 3 departments of plain noodles dark, the light guide plate light-emitting is not mixed. In order to avoid the problems, the depths of the grooves 4 are gradually increased along the direction far away from the light incident surface 3; based on the structure of the grooves 4 with semicircular longitudinal sections, the diameters of the sections of the grooves 4 are gradually increased along the direction far away from the light incident surface 3, so that light rays incident into the light guide plate from the light incident surface 3 can reach the position far away from the light incident surface 3, and the light guide plate is ensured to uniformly emit light.
In the first embodiment of the present invention, as shown in fig. 5 and 6, a light source is disposed on one side of the light guide plate, that is, the light guide plate is a single-side light-entering light guide plate. In fig. 5, the abscissa x is the length of the groove 4 from the junction of the light incident surface 3 and the bottom surface 2, and the ordinate is the diameter of the cross section of the groove 4; the coordinate system in fig. 5 corresponds to the coordinate system in fig. 6 to indicate the location of the origin of coordinates. For example, the light source is opposite to the left side surface of the light guide plate, that is, the left side surface of the light guide plate is an incident surface 3, and as shown in fig. 2, the side surface of the light guide plate opposite to the incident surface 3 is an anti-incident surface 9, that is, the right side surface of the light guide plate is the anti-incident surface 9. The cross-sectional diameters of the grooves 4 on the bottom surface 2 gradually increase from left to right, so that the cross-sectional diameter of the groove 4 closer to the light reflection and incidence surface 9 is larger.
The increasing rule of the section diameters of the grooves 4 conforms to a Gaussian gradient curve. Further, in order to avoid the problem of bright edges due to light accumulation at the position of the light guide plate close to the light incident reflection surface 9, a cross-sectional diameter design curve of the groove 4 in this embodiment (as shown in fig. 6, where an abscissa x is a length of the groove 4 from a junction of the light incident reflection surface 3 and the bottom surface 2, and an ordinate is a cross-sectional diameter of the groove 4) needs to be locally pressed down at the position close to the light incident reflection surface 9, that is, a highest peak of the cross-sectional diameter design curve of the groove 4 is not located at the rightmost side of the curve; the grooves 4 with the largest cross-sectional diameter are not adjacent to the light reflection and incidence surface 9, but are spaced from the light reflection and incidence surface 9 by a plurality of grooves 4.
In the second embodiment of the present invention, as shown in fig. 7 and 8, the light sources are disposed on two opposite sides of the light guide plate, that is, the light guide plate is a double-sided light-entering light guide plate. In fig. 7, the abscissa x is the length of the groove 4 from the junction of the light incident surface 3 and the bottom surface 2, and the ordinate is the cross-sectional diameter of the groove 4; the coordinate system in fig. 7 corresponds to the coordinate system in fig. 8 to indicate the location of the origin of coordinates. For example, the light sources are distributed on the left side and the right side of the light guide plate, and the left side surface and the right side surface of the light guide plate are both light incident surfaces 3. The diameters of the cross sections of the grooves 4 on the bottom surface 2 gradually increase from the left side to the right side to the middle side, and the increasing rule of the diameters of the cross sections of the grooves 4 conforms to a gaussian gradient curve (as shown in fig. 8, wherein the abscissa x is the length of the groove 4 from the junction of the light incident surface 3 and the bottom surface 2, and the ordinate is the diameter of the cross section of the groove 4). The cross-sectional diameter of the groove 4 adjacent to the left light incident surface 3 and the cross-sectional diameter of the groove 4 adjacent to the right light incident surface 3 are equal and are the minimum diameters; the sectional diameter of the groove 4 located at the center of the arrangement of the plurality of grooves 4 is largest.
As shown in fig. 3, the length of each groove 4 is smaller than the length of the light incident surface 3, and a gap 11 is formed between each of the two ends of each groove 4 in the length direction and the edge of the bottom surface 2, so that the gap 11 prevents local light energy from accumulating at the edge of the bottom surface to form a bright edge. In one embodiment of the present invention, the gap is 3 mm.
The light guide plate is last except that the side that goes into the plain noodles 3 all sets up light shield layer 6 to pass through light shield layer 6 is to being emitted the light of the side of light guide plate reflects, makes light can follow go out 1 outgoing of plain noodles, thereby promotes the luminous efficacy of light guide plate.
The ink layer 5 comprises synthetic resin, SiO2/TiO 2/PMMA/nylon and a diluent; mixing synthetic resin, SiO2 (silicon dioxide)/TiO 2 (titanium dioxide)/PMMA (polymethyl methacrylate)/nylon and a diluent at the temperature of 23 +/-2 ℃ and the humidity of 55% +/-5% under a dust-free condition, and fully stirring for 20min to obtain the ink layer 5.
The outer surface of the ink layer 5 is flush with the bottom surface; when other optical components are assembled below the light guide plate, the optical components cannot scratch the ink layer 5, and the ink layer 5 is prevented from being scratched or falling off.
Based on any one of the light guide plates, the invention further provides a preparation process of the light guide plate, as shown in fig. 9, which comprises the following steps:
cutting the light guide plate according to requirements, and polishing the light incident surface and the light emergent surface;
manufacturing a plurality of grooves on the bottom surface of the light guide plate based on CNC (computer numerical control) machining or mold injection molding, wherein the grooves are sequentially arranged at intervals along a direction perpendicular to the light incident surface;
mixing synthetic resin, SiO2 (silicon dioxide)/TiO 2 (titanium dioxide)/PMMA (polymethyl methacrylate)/nylon and a diluent under the conditions of 23 +/-2 ℃ and 55 +/-5% of humidity and no dust, and fully stirring for 20min to prepare the ink;
coating ink or filling ink into each groove to form an ink layer, and scraping the redundant ink by using a silica gel scraper to enable the outer surface of the ink layer to be flush with the bottom surface;
and curing the ink layer.
Specifically, in the present invention, an IR furnace (infrared furnace) may be used to cure the ink layer; or curing the ink layer by using a UV (ultraviolet) furnace; or sending the light guide plate into a thermal tunnel furnace, and curing the ink layer in a thermal curing manner.
The invention also provides a side-in type backlight module, as shown in fig. 10, the side-in type backlight module comprises the light guide plate, a light source 100 and a reflector plate 7; the light sources 100 are distributed on one side/opposite sides of the light guide plate; the reflecting sheet 7 is arranged opposite to the bottom surface 2; and part of light rays in the light guide plate escape from the gap between two adjacent grooves 4 and are reflected back to the light guide plate by the reflector plate 7, so that the light emitting efficiency of the light guide plate is further improved.
The invention also provides a display device, as shown in fig. 11, the display device comprises the lateral entrance type backlight module and a display screen 8; wherein the display screen 8 is positioned above the light guide plate.
In the present invention, when the display device is turned on and the display screen 8 is turned on, 9 points are selected in the display area of the display screen 8 to respectively detect the brightness, and a 9-point brightness value, a 9-point average brightness, and a 9-point brightness uniformity are obtained, as shown in table one:
TABLE 9-Point luminance value, 9-Point average luminance, and 9-Point luminance uniformity of the display device of the present invention
The invention also selects 9 points to respectively detect the brightness of the display device using the traditional screen printing ink dot structure light guide plate, and obtains a 9-point brightness value, a 9-point average brightness and a 9-point brightness uniformity, as shown in the table two:
table two conventional display device 9-point luminance value, 9-point average luminance and 9-point luminance uniformity
Through the two detection results, it can be found that only the light guide plate is replaced to carry out 9-point data test, under the same framework of the light source, the reflector plate and the like, the light emitting efficiency of the display device adopting the light guide plate is improved by about 15%, and the brightness uniformity is improved by about 12%.
It will be understood that the invention is not limited to the examples described above, but that modifications and variations will occur to those skilled in the art in light of the above teachings, and that all such modifications and variations are considered to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A light guide plate is characterized in that a plurality of grooves are formed in the bottom surface of the light guide plate, and the grooves are sequentially arranged at intervals in a direction perpendicular to the light incident surface; an ink layer is arranged in each groove and is attached to the bottom of the corresponding groove.
2. The light guide plate according to claim 1, wherein each of the grooves has an arc-shaped longitudinal section.
3. The light guide plate according to claim 1 or 2, wherein each of the grooves has a semicircular longitudinal section.
4. The light guide plate according to claim 1, wherein the depth of the plurality of grooves increases in a direction away from the light incident surface.
5. The light guide plate according to claim 1, wherein a gap is provided between both ends of each groove and an edge of the bottom surface.
6. The light guide plate of claim 1, wherein the ink layer comprises a synthetic resin, SiO2/TiO 2/PMMA/nylon, and a diluent.
7. The light guide plate according to claim 1, wherein the outer surface of the ink layer is flush with the bottom surface of the light guide plate.
8. A preparation process of a light guide plate is characterized by comprising the following steps:
forming a plurality of grooves on the bottom surface of the light guide plate based on a CNC (computerized numerical control) or mold injection molding mode, wherein the plurality of grooves are sequentially arranged at intervals along the light incident direction;
and arranging an ink layer in each groove, and curing the ink layer.
9. A side-in backlight module, which comprises a light source, and is characterized in that the backlight module also comprises the light guide plate as claimed in any one of claims 1 to 7, wherein the light source is distributed at one side/two opposite sides of the light guide plate.
10. A display device comprising the side-entry backlight module of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210457211.2A CN114791647A (en) | 2022-04-27 | 2022-04-27 | Light guide plate and preparation process thereof, lateral-entry backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210457211.2A CN114791647A (en) | 2022-04-27 | 2022-04-27 | Light guide plate and preparation process thereof, lateral-entry backlight module and display device |
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| CN114791647A true CN114791647A (en) | 2022-07-26 |
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| CN202210457211.2A Pending CN114791647A (en) | 2022-04-27 | 2022-04-27 | Light guide plate and preparation process thereof, lateral-entry backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112965296A (en) * | 2021-03-17 | 2021-06-15 | 深圳创维－Rgb电子有限公司 | Backlight module and display device |
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| CN102156320A (en) * | 2011-02-25 | 2011-08-17 | 深圳市华星光电技术有限公司 | Side-entrance type light guide plate assembly and backlight module |
| CN104316990A (en) * | 2014-11-24 | 2015-01-28 | 京东方科技集团股份有限公司 | Light guide plate, manufacturing method of light guide plate, backlight unit and liquid-crystal display device |
| JP2017041330A (en) * | 2015-08-18 | 2017-02-23 | 恵和株式会社 | Light guide sheet, backlight unit, liquid crystal display device and manufacturing method of light guide sheet for backlight unit |
| CN107166254A (en) * | 2017-07-05 | 2017-09-15 | 合肥惠科金扬科技有限公司 | Backlight module and display |
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2022
- 2022-04-27 CN CN202210457211.2A patent/CN114791647A/en active Pending
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| CN101334551A (en) * | 2007-06-27 | 2008-12-31 | 何英杰 | Thin type backlight module |
| CN102156320A (en) * | 2011-02-25 | 2011-08-17 | 深圳市华星光电技术有限公司 | Side-entrance type light guide plate assembly and backlight module |
| CN104316990A (en) * | 2014-11-24 | 2015-01-28 | 京东方科技集团股份有限公司 | Light guide plate, manufacturing method of light guide plate, backlight unit and liquid-crystal display device |
| JP2017041330A (en) * | 2015-08-18 | 2017-02-23 | 恵和株式会社 | Light guide sheet, backlight unit, liquid crystal display device and manufacturing method of light guide sheet for backlight unit |
| CN107166254A (en) * | 2017-07-05 | 2017-09-15 | 合肥惠科金扬科技有限公司 | Backlight module and display |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112965296A (en) * | 2021-03-17 | 2021-06-15 | 深圳创维－Rgb电子有限公司 | Backlight module and display device |
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