CN112415808A - Two-dimensional regional light-dimming light guide plate with embedded Mini-LED light source - Google Patents
Two-dimensional regional light-dimming light guide plate with embedded Mini-LED light source Download PDFInfo
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- CN112415808A CN112415808A CN202011251966.4A CN202011251966A CN112415808A CN 112415808 A CN112415808 A CN 112415808A CN 202011251966 A CN202011251966 A CN 202011251966A CN 112415808 A CN112415808 A CN 112415808A
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- light guide
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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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- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
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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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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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
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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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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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
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0078—Side-by-side arrangements, e.g. for large area displays
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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
- G02F1/133603—Direct backlight with LEDs
Abstract
The invention relates to a two-dimensional regional dimming light guide plate with an embedded Mini-LED light source, which comprises a backlight unit, a lower diffusion film, a horizontal prism brightness enhancement film, a vertical prism brightness enhancement film and an upper diffusion film which are sequentially arranged from bottom to top. The backlight unit is composed of a plurality of single regional dimming light guide plates. The single regional dimming light guide plate is of a rectangular three-dimensional structure, the inner side wall of the single regional dimming light guide plate is coated with a high-reflectivity material, the upper surface of the single regional dimming light guide plate is a smooth and flat light emitting surface, the bottom surface of the single regional dimming light guide plate is provided with a microstructure array and a high-reflectivity dielectric layer, and the single regional dimming light guide plate is provided with a plurality of regularly or irregularly arranged embedded holes. The invention organically combines the luminous source and the light guide plate into a whole, thereby not only reducing the thickness of the whole backlight module, but also improving the environmental contrast by combining the regional dynamic dimming technology; in addition, the number of the luminous sources is reduced, the power consumption of the backlight module is reduced, and the lighting effect is improved.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a two-dimensional regional dimming light guide plate with an embedded Mini-LED light source.
Background
Since liquid crystal has features of low voltage, micro power consumption, easy colorization, passive display, etc., liquid crystal displays are most studied compared to OLEDs, PDPs, FEDs, however, liquid crystal panels (LCDs) do not emit light themselves, so the backlight module playing a role of light emission plays a very important role.
The backlight module is divided into a side-in type backlight and a direct type backlight according to the incident mode of the LED light source. The traditional direct type backlight of the LED can adjust light in a local area, namely different backlight areas are respectively arranged, the luminance of each LED is independently controlled according to a liquid crystal display image, and the brightness of the area is independently adjusted; in the conventional side-in type LED backlight, LED dies are arranged at the peripheral edge of a liquid crystal screen, and a light guide plate is further used, so that when the LED backlight module emits light, the light emitted from the edge of the screen is transmitted to the central area of the screen through the light guide plate.
However, in order to make the picture color vivid, the conventional LED direct type backlight needs thousands of LED dies, the circuit and design cost is not easy, and the power consumption of the whole display is very large. In the traditional lateral-entering LED backlight, in the process of picture conversion, the phenomenon of fuzzy phenomenon caused by the reduction of gray level exists in the area conversion; the edge effect also causes poor uniformity of screen brightness, i.e. the brightness in the edge area is higher than that in the middle area.
Disclosure of Invention
In view of the above, the present invention provides a two-dimensional area dimming light guide plate embedded with a Mini-LED light source, which solves the problem that the existing edge-lit backlight cannot perform area dynamic dimming.
In order to achieve the purpose, the invention adopts the following technical scheme:
a two-dimensional regional dimming light guide plate with an embedded Mini-LED light source comprises a backlight unit, a lower diffusion film, a horizontal prism brightness enhancement film, a vertical prism brightness enhancement film and an upper diffusion film which are sequentially arranged from bottom to top.
Further, the backlight unit is composed of a plurality of single area dimming light guide plates.
Furthermore, the single regional dimming light guide plate is of a rectangular three-dimensional structure, the inner side wall of the single regional dimming light guide plate is coated with a high-reflectivity material, the upper surface of the single regional dimming light guide plate is a smooth and flat light emitting surface, the bottom surface of the single regional dimming light guide plate is provided with a microstructure array which is arranged and a high-reflectivity dielectric layer which is coated on the microstructure array, and a plurality of regularly or irregularly arranged embedded holes are arranged in the corners, the periphery or the middle region of the light guide. .
Furthermore, a side-in type Mini-LED light source or a Mini-LED light source array is sunken in the embedded hole, and the normal direction of the light emitting surface of the light source forms a parallel angle with the bottom surface of the light guide plate.
Furthermore, the embedded hole comprises an embedded hole upper surface and a light incident surface connected with the bottom surface and the light emergent surface of the single regional dimming light guide plate; the height of the embedded hole is smaller than the thickness of the single block region dimming light guide plate.
Furthermore, an optical transmission channel with a preset space distance is reserved between the bottom surface boundary of the embedded hole and the side wall of the single regional dimming light guide plate.
Furthermore, a light transmission channel with a preset space distance is reserved between the upper surface of the embedded hole and the light emergent surface of the single regional dimming light guide plate.
Furthermore, only one of the 4 side walls of the embedded hole allows light to exit, the other three side walls are coated with black materials to block the light from exiting, and the side wall allowing the light to exit faces the middle area of the light guide plate.
Furthermore, multilayer optical films with different optical properties are arranged above the light emergent surface.
A preparation method of an embedded hole of a two-dimensional area dimming light guide plate with an embedded Mini-LED light source comprises the following steps:
step S1, preparing the light guide plate by adopting a laser etching process, and placing the single-block regional dimming light guide plate and the lower glass substrate on an objective table of laser etching equipment;
step S2, irradiating the corner area of the single local dimming light guide plate by adopting high-power laser with preset wavelength;
and step S3, evaporating and removing the light guide plate material after a preset time to obtain regular or irregular embedded holes.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can greatly reduce the thickness of the whole backlight unit by coupling the side-in Mini-LED light source to the corner area of the single area dimming light guide plate.
2. According to the invention, the light and dark states of the light sources of the side-in type Mini-LEDs are independently controlled through the ITO electrodes, and the light and dark states and the gray level states of the single regional dimming light guide plate are realized, so that the two-dimensional regional dimming of the whole backlight module is realized, the thickness of the whole backlight module is reduced, the environmental contrast of the whole backlight module is improved, the problem of light leakage of the traditional backlight is avoided, meanwhile, the lighting of the side-in type Mini-LED light sources can be locally controlled, the image quality is clearer and finer, and better visual experience is provided.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a backlight unit with a Mini-LED embedded therein and a two-dimensional area dimming light guide plate according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a monolithic area-dimming light guide plate according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a corner area light guide plate according to an embodiment of the invention.
FIG. 5 is a simulation diagram of the present invention.
FIG. 6 is a derivative structure of an embodiment of the invention.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
Referring to fig. 1, the present invention provides a two-dimensional area dimming light guide plate with embedded Mini-LED light sources, which includes a backlight unit 1, a lower diffusion film 2, a horizontal prism brightness enhancement film 3, a vertical prism brightness enhancement film 4, and an upper diffusion film 5, which are sequentially disposed from bottom to top. The relatively uniform light emitted by the backlight unit 1 firstly passes through the lower diffusion film 2 and is converted into a surface light source with uniformly distributed and fuzzy dots; then, increasing the area light source through multiple reflection and refraction of two layers of the horizontal prism brightness enhancement film 3 and the vertical prism brightness enhancement film 4 made of two materials with high refractive index and low refractive index; the increased area light source penetrates through the upper diffusion film 5, so that the visual angle is improved, and the softness of the area light source is increased; and finally, the optimized light rays acted by the optical diaphragm are emitted to the liquid crystal display panel.
Referring to fig. 2, in the present embodiment, the backlight unit includes 4 sidewalls 11 coated with a high-reflectivity material, a smooth and flat light-emitting surface 12, and a bottom 13 of a light guide plate coated with a microstructure array and a high-reflectivity dielectric layer, where the light-emitting surface 12 and the bottom 13 of the light guide plate are oppositely disposed, 14 is a single block of local dimming light guide plate of the backlight unit, 15 is an embedded hole in a corner region of the backlight unit and the single block of local dimming light guide plate 14, and when the embedded hole is located at a boundary of the light guide plate, the embedded hole can be simplified to a corner cut form.
Preferably, each light guide plate forms an independent light adjusting area, and the gray scale, brightness and darkness of the area can be controlled by a Mini-LED light source; the splicing seam of adjacent backlight units is between 0.2mm and 10mm
In this embodiment, the inner side wall of the single regional dimming light guide plate is coated with a high-reflectivity material, the upper surface of the single regional dimming light guide plate is a smooth and flat light emitting surface, the bottom surface of the regional dimming light guide plate is provided with a microstructure array and a high-reflectivity dielectric layer, and the regional dimming light guide plate is provided with a plurality of regularly or irregularly arranged embedded holes. And a lateral entrance Mini-LED light source is sunken in the embedded hole. The Mini-LED size determines the size of the embedded hole, and the embedded hole can also be in the form of a through hole and a chamfer.
Preferably, in this embodiment, the embedded hole includes an embedded hole upper surface, a light incident surface connected to the bottom surface and the light exit surface of the single local dimming light guide plate; the height of the embedded hole is smaller than the thickness of the single block region dimming light guide plate. And only one of the 4 side walls of the embedded hole allows light to exit, and the other three side walls are coated with black materials to block the light from exiting.
Preferably, in order to ensure that the backlight unit can form a uniform surface light source and improve the brightness of the light output, a plurality of layers of optical films with different optical properties are arranged above the light output surface. The length and width of each film are equal to or slightly larger than the total size of the spliced light guide plate
A preparation method of an embedded hole of a two-dimensional area dimming light guide plate with an embedded Mini-LED light source comprises the following steps:
step S1, preparing the light guide plate by adopting a laser etching process, and placing the single-block regional dimming light guide plate and the lower glass substrate on an objective table of laser etching equipment;
step S2, irradiating the corner area of the single local dimming light guide plate by adopting high-power laser with preset wavelength;
and step S3, evaporating and removing the light guide plate material after a preset time to obtain regular or irregular embedded holes.
Preferably, the preparation method of the embedded hole includes, but is not limited to, laser etching, and other material reduction manufacturing methods can also be applied to the embedded hole.
Preferably, the laser etching equipment is selected from multi-axis laser micro-nano processing equipment, ultra-short pulse drilling and etching equipment and the like.
Example 1:
referring to fig. 2, in the present embodiment, the backlight unit 1 adopts nine physical partitions, that is, nine single local dimming light guide plates 14 are assembled according to a regular matrix distribution, and a joint seam of the nine single local dimming light guide plates is smaller than 0.5mm, so as to implement two-dimensional local dimming by adjusting a bright-dark state of the single local dimming light guide plate 14.
In the present embodiment, the size of the backlight unit 1 is 45mm × 27mm, that is, the size of the single area dimming light guide plate 14 is 15mm × 9mm, and the material is transparent acrylic (PMMA). The bottom surfaces 13 and 14 side walls are coated with white polyethylene terephthalate, a high reflectivity material.
In the present embodiment, the size of the embedded hole 15 is 0.9mm × 0.4mm, there are 36 embedded holes 15 in the whole backlight 1, and the monolithic area dimming light guide plate 14 has four embedded holes 15.
As shown in fig. 3, preferably, in this embodiment, the single local dimming light guide plate includes 4 sidewalls 141 coated with a high-reflectivity material, a smooth and flat light exit surface 142, a bottom surface 143 coated with a microstructure array and a high-reflectivity dielectric layer, the embedded holes 15, and scattering dots 144, where the scattering dots 144 are irregularly distributed on the bottom surface 143 of the single local dimming light guide plate, so as to scatter light emitted from the lateral entrance Mini-LED light source to the light exit surface 142, and destroy the total reflection inside the single local dimming light guide plate 14, thereby forming a uniform light exit surface source.
Preferably, the bottom surface 143 and the 4 sidewalls 141 of the monolithic local dimming light guide plate 14 are coated with white polyethylene terephthalate, which is a high-reflectivity material.
Preferably, the height of the embedded hole 15 is smaller than the thickness of the single area dimming light guide plate 14, i.e., smaller than the thickness of the backlight unit 1. And only one of the 4 side walls of the embedded hole 15 allows light to exit, and the other three side walls are coated with black materials to block the light from exiting.
Referring to fig. 5, in the present embodiment, the lateral Mini-LED light source is embedded in the embedded hole 15, and the main structure includes an embedded hole upper surface 151, a light incident surface 152 connected to the bottom surface 143 (13) and the light emitting surface 142 (12), a corner region 155 with a dark space problem, an optical transmission channel 154 and a light transmission channel 156 at a certain space distance, wherein the light transmission channel belongs to an integral molding part of the light guide plate. The Mini-LED light source emits light with a single side wall, the height of a light emitting area is equal to or slightly less than that of the single regional dimming light guide plate 14, the light emitting center direction of the light source faces the inside of the single regional dimming light guide plate 14, a light emitting surface of the Mini-LED light source forms a certain angle with the bottom surface 143 (13) to form a side entrance type, and the light emitting surface of the Mini-LED light source is the side wall 153.
Preferably, the Mini-LED light source may adopt blue light or ultraviolet light, white light or red, green and blue tricolor light, and when adopting the Mini-LED light source of blue light or ultraviolet light, a light color conversion material such as quantum dots, fluorescent powder and the like is required at a certain position in the backlight unit; when a Mini-LED light source of white light or three primary colors of red, green and blue is used, no light conversion material is needed.
Preferably, the light is emitted from the Mini-LED light source light emitting surface, enters the single local dimming light guide plate 14 through the light incident surface 152, and is scattered to the light emitting surface 42 by the scattering dots 44 on the bottom surface 143 (13), so as to form a surface light source with high brightness and good uniformity.
Preferably, the upper surface 151 of the embedded hole is coated with white polyethylene terephthalate, which is a high-reflectivity material.
Preferably, in order to eliminate the hot spot problem caused by hiding the Mini-LED light source, an optical transmission channel 154 is left at a certain spatial distance between the embedded hole upper surface 151 and the light exit surface 142 (12). For one of the Mini-LED light sources, after the light emitted from the light emitting surface 153 of the remaining Mini-LED light sources passes through the light incident surface 152, a part of the light directly irradiates or acts on the light emitting surface 142 through the scattering dots 144, and the other part of the light is reflected to the light emitting surface 142 through the upper surface 151 of the embedded hole.
Preferably, in order to solve the problem of dark areas in the corner regions, a light transmission channel 156 is formed at a certain distance between the bottom surface boundary of the embedding hole 5 and the sidewall 141 (11). On one hand, the light emitted from the light emitting surface 153 of the Mini-LED light source is directly incident to the corner region 155 through the light transmission channel 156, and is scattered by scattering dots (not shown in the drawings, since the scattering dots 144 of the bottom surface 143 of the monolithic local dimming light guide plate 14 and the corner region scattering dots are integrally distributed) and reflected by the sidewall 141 to enter the light emitting surface 142; on the other hand, the scattered light of the single local dimming light guide plate 14 is directly incident to the corner region 155 through the light transmission channel 156, thereby illuminating the corner dark region.
In this embodiment, in order to verify a light emitting effect of the embodiment of the present invention, the optical simulation software Tracepro is used to perform light tracing on the two-dimensional area dimming light guide plate embedded with the Mini-LED light source, as shown in fig. 5, from the simulation result, the light emitting effect of the two-dimensional area dimming light guide plate embedded with the Mini-LED light source is better.
Further, as shown in fig. 6, a derivative structure of the monolithic area-dimming light guide plate 14 can be obtained by deforming the same. The derived structure reserves the space from the upper surface of the embedded hole to the light-emitting surface of the light guide plate, removes the space between the side surface of the embedded hole and the adjacent side wall, and places the Mini-LED in the embedded hole removing space area to realize uniform light emission of the light guide plate.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (10)
1. The two-dimensional area dimming light guide plate with the embedded Mini-LED light source is characterized by comprising a backlight unit, a lower diffusion film, a horizontal prism brightness enhancement film, a vertical prism brightness enhancement film and an upper diffusion film which are sequentially arranged from bottom to top.
2. The two-dimensional area-dimming light guide plate with embedded Mini-LED light sources as claimed in claim 1, wherein the backlight unit is composed of a plurality of single area-dimming light guide plates.
3. The two-dimensional regional dimming light guide plate with embedded Mini-LED light sources of claim 2, wherein the single regional dimming light guide plate has a rectangular three-dimensional structure, the inner side wall of the single regional dimming light guide plate is coated with a high-reflectivity material, the upper surface of the single regional dimming light guide plate is a smooth and flat light emitting surface, the bottom surface of the single regional dimming light guide plate is provided with a microstructure array and a high-reflectivity medium layer, and the single regional dimming light guide plate is provided with a plurality of embedded holes which are regularly or irregularly arranged, and the embedded holes are arranged in the corners, the periphery or the middle.
4. The two-dimensional area dimming light guide plate with embedded Mini-LED light sources as claimed in claim 3, wherein the embedded holes are embedded with side-embedded Mini-LED light sources or arrays of Mini-LED light sources, and the normal direction of the light emitting surface of the light sources forms a parallel angle with the bottom surface of the light guide plate.
5. The two-dimensional area dimming light guide plate with embedded Mini-LED light sources as claimed in claim 3, wherein the embedded holes comprise an upper surface of the embedded hole, a light incident surface connected to the bottom surface and the light exit surface of the single area dimming light guide plate; the height of the embedded hole is smaller than the thickness of the single block region dimming light guide plate.
6. The two-dimensional area dimming light guide plate with embedded Mini-LED light sources as claimed in claim 3, wherein: of the 4 side walls of the embedded hole, only one side wall allows light to exit, the other three side walls are coated with black materials to block the light from exiting, and the side wall allowing the light to exit faces to the middle area of the light guide plate.
7. The two-dimensional area dimming light guide plate with embedded Mini-LED light sources as claimed in claim 3, wherein: and an optical transmission channel with a preset spatial distance is reserved between the bottom surface boundary of the embedded hole and the side wall of the single regional dimming light guide plate.
8. The two-dimensional area dimming light guide plate with embedded Mini-LED light sources as claimed in claim 3, wherein: and a light transmission channel with a preset space distance is reserved between the upper surface of the embedded hole and the light emergent surface of the single regional dimming light guide plate.
9. The two-dimensional area dimming light guide plate with embedded Mini-LED light sources as claimed in claim 1, wherein a plurality of layers of optical films with different optical properties are disposed above the light exit surface.
10. A preparation method of an embedded hole of a two-dimensional area dimming light guide plate with an embedded Mini-LED light source is characterized by comprising the following steps:
step S1, preparing the light guide plate by adopting a laser etching process, and placing the single-block regional dimming light guide plate and the lower glass substrate on an objective table of laser etching equipment;
step S2, irradiating the corner area of the single local dimming light guide plate by adopting high-power laser with preset wavelength;
and step S3, evaporating and removing the light guide plate material after a preset time to obtain regular or irregular embedded holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251966.4A CN112415808A (en) | 2020-11-11 | 2020-11-11 | Two-dimensional regional light-dimming light guide plate with embedded Mini-LED light source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011251966.4A CN112415808A (en) | 2020-11-11 | 2020-11-11 | Two-dimensional regional light-dimming light guide plate with embedded Mini-LED light source |
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| CN112415808A true CN112415808A (en) | 2021-02-26 |
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| CN202011251966.4A Pending CN112415808A (en) | 2020-11-11 | 2020-11-11 | Two-dimensional regional light-dimming light guide plate with embedded Mini-LED light source |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114035370A (en) * | 2021-09-23 | 2022-02-11 | 福州大学 | Optical-mechanical structure capable of adjusting light in sliding manner |
| CN115185125A (en) * | 2022-07-20 | 2022-10-14 | 福州大学 | Mini-LED light source embedded backlight module |
| CN115220265A (en) * | 2022-07-20 | 2022-10-21 | 福州大学 | Backlight module with annular light guide ring |
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