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CN112578592B - Light diffusion component, backlight assembly and interactive intelligent panel - Google Patents

Light diffusion component, backlight assembly and interactive intelligent panel Download PDF

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Publication number
CN112578592B
CN112578592B CN201910941680.XA CN201910941680A CN112578592B CN 112578592 B CN112578592 B CN 112578592B CN 201910941680 A CN201910941680 A CN 201910941680A CN 112578592 B CN112578592 B CN 112578592B
Authority
CN
China
Prior art keywords
light
annular
cover body
smart tablet
interactive smart
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910941680.XA
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Chinese (zh)
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CN112578592A (en
Inventor
王本贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
Original Assignee
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Shiyuan Electronics Thecnology Co Ltd, Guangzhou Shirui Electronics Co Ltd filed Critical Guangzhou Shiyuan Electronics Thecnology Co Ltd
Priority to CN201910941680.XA priority Critical patent/CN112578592B/en
Priority to PCT/CN2020/099776 priority patent/WO2021063055A1/en
Publication of CN112578592A publication Critical patent/CN112578592A/en
Application granted granted Critical
Publication of CN112578592B publication Critical patent/CN112578592B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0273Diffusing elements; Afocal elements characterized by the use
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133603Direct backlight with LEDs

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

Abstract

The application discloses a light diffusion component, a backlight assembly and an interactive intelligent panel, wherein the light diffusion component is a cover body made of transparent materials, the cover body is provided with a cavity, and the cavity is provided with an opening part; a convex part is convexly arranged at the middle part of the inner wall of the cover body towards the direction of the opening part, an annular part is arranged on the inner wall of the cover body, and the cavity is formed between the annular part and the convex part; the top of the protruding portion is provided with a first groove. The light diffusion component of the application fully and uniformly mixes the light passing through the component and then emits the light.

Description

Light diffusion component, backlight assembly and interactive intelligent panel
Technical Field
The invention relates to the field of backlight modules, in particular to a light diffusion component, a backlight assembly and an interactive intelligent panel.
Background
The backlight module is one of key parts of the liquid crystal display panel, and has the functions of providing enough light sources with uniform brightness and distribution, so that the liquid crystal display panel can normally display images, and mainly comprises the light sources, a light guide plate, an optical film, a plastic frame and the like, wherein the light sources are generally LED lamps, and the light rays of the LED lamps are emitted to the display panel after passing through the light guide plate and the optical film, and in the process of realizing the invention, the inventor finds that the following problems exist in the prior art: the light of LED lamp is not even enough through the light mixing of light behind the light guide plate, leads to the light homogeneity that launches to the display panel on is relatively poor, influences the display effect of display.
Disclosure of Invention
The invention aims to provide a light diffusion component, a backlight assembly and an interactive intelligent panel, wherein the light diffusion component is used for fully and uniformly mixing light passing through the light diffusion component and then emitting the light.
The technical scheme is as follows:
the invention discloses a light diffusion component.
The light diffusion component is a cover body made of transparent materials, the cover body is provided with a cavity, and the cavity is provided with an opening part; a convex part is convexly arranged at the middle part of the inner wall of the cover body towards the direction of the opening part, an annular part is arranged on the inner wall of the cover body, and the cavity is formed between the annular part and the convex part; the top of the protruding portion is provided with a first groove.
The protruding portions are distributed in a step-like manner along a direction toward the opening portion.
The convex part is a cylindrical or conical step.
The protruding part is formed by superposing at least two concentric cylindrical steps.
The diameter of the cylindrical step is reduced in a direction toward the opening.
The annular portions are concentrically distributed in an annular step shape along a direction toward the opening portion.
The center of the annular step and the central axis of the protruding part are on the same straight line.
The annular part is formed by connecting at least two concentric annular steps.
The width of the annular step near the protruding portion is larger than the width of the annular step far from the protruding portion.
The diameter of the annular step increases in a direction toward the opening.
At least three first supporting convex parts are arranged on the cover body, and the first supporting convex parts protrude towards the opening part relative to the annular part.
At least three second supporting convex parts are arranged on the outer surface of the cover body, and the second supporting convex parts protrude towards the direction away from the opening part.
The cover body further comprises an edge portion, the edge portion is square, and the edge portion comprises four corner portions.
An embossment is provided on an outer surface of the cover body in a direction along a center of the cover body toward the corner.
A notch is arranged on the side edge of at least one corner.
At least two rings of annular extinction layers surrounding the center of the cover body are arranged on the outer surface of the cover body.
The annular extinction layer comprises extinction net points, and the diameter of the extinction net points of the annular extinction layer close to the edge of the cover body is larger than that of the extinction net points of the annular extinction layer close to the center of the cover body.
The middle part of the outer surface of the cover body is provided with a second groove, and the second groove corresponds to the protruding part.
The invention also discloses a backlight assembly.
The backlight assembly comprises a substrate, LED lamp beads and any one of the light diffusion components, wherein the LED lamp beads are arranged on the substrate, the light diffusion components are covered on the LED lamp beads, and the LED lamp beads are at least partially positioned in the first grooves.
The invention also discloses an interactive intelligent tablet.
The interactive intelligent panel comprises a display screen, a substrate, LED lamp beads, a diffusion plate, an optical diaphragm and any one of the light diffusion components, wherein the LED lamp beads are arranged on the substrate, the light diffusion component covers the LED lamp beads, and the LED lamp beads are at least partially positioned in the first groove; the diffusion plate is abutted with the light diffusion component, and the optical film is positioned between the display screen and the diffusion plate.
The head of the LED lamp bead is positioned in the first groove, and the tail of the LED lamp bead is exposed out of the first groove.
At least three second supporting convex parts are arranged on the outer surface of the cover body, and the second supporting convex parts protrude towards the direction away from the opening part; the second supporting protrusion is used for supporting the diffusion plate and the optical film.
And a light equalizing layer is arranged on the surface of the substrate, and the light equalizing layer corresponds to the light diffusion component.
The color of the light equalizing layer corresponding to the annular part is darker than the color of the light equalizing layer corresponding to the convex part; or the density of the light-equalizing layer corresponding to the annular part is greater than that of the light-equalizing layer corresponding to the convex part.
The cover body comprises an edge part, the edge part is square, and the edge part comprises four corner parts; the LED lamp beads and the light diffusion components are uniformly distributed on the substrate, the corners of the adjacent four light diffusion components are opposite, and the sides of the adjacent two light diffusion components are close to each other.
The intelligent interactive panel further comprises a glass screen, a back plate and a frame, wherein the glass screen is positioned on the front side of the display screen, the back plate is positioned on the rear side of the substrate, the substrate is fixed on the back plate, and the glass screen, the display screen, the optical membrane, the diffusion plate and the back plate are fixedly installed through the frame.
The invention also discloses another light diffusion component.
The light diffusion component is a cover body made of transparent materials, the cover body is provided with a cavity, and the cavity is provided with an opening part; a protruding part is arranged in the middle of the inner wall of the cover body in the direction towards the opening part, the protruding part forms a light receiving part of the cover body, an annular part is arranged on the inner wall of the cover body, and the annular part forms a light mixing part of the cover body; the light receiving part protrudes towards the direction of the opening part; the light receiving part comprises a light receiving part, a light mixing cavity, a convex part and a first groove, wherein the light receiving part is provided with a first light guide surface, the light receiving part is provided with a second light guide surface, the light mixing cavity is formed between the first light guide surface and the second light guide surface, and the top end of the convex part is provided with the first groove.
The advantages and principles of the invention are described below:
1. The light diffusion component is a cover body made of transparent materials, and a first groove is formed in the top end of the protruding part of the cover body; when the light diffusion component is used on the intelligent interaction panel, the light diffusion component covers the LED lamp beads, the heads of the LED lamp beads are positioned in the first grooves, and the tails of the LED lamp beads are exposed out of the first grooves; light of the LED lamp beads enters from the direction of the cover body towards the opening part, and is emitted from the outer surface of the cover body, the cover body has a light guiding effect on light of the light source, and the light is refracted out from different directions of the outer surface of the cover body after being reflected in the cover body, so that the uniformity of the light is improved. The inner wall of the cover body is provided with a convex part, the surface of a first groove of the convex part is spherical, the convex part of the cover body is similar to a convex lens, light rays emitted by the LED lamp beads are converged towards the convex part, and part of the light rays converged at the convex part are diffused towards the annular part through the convex part in the process of refracting towards the outer surface of the cover body, so that the light rays are mixed.
Part of light rays of the LED lamp beads enter the cover body and then are directly emitted from the outer surface of the cover body, part of light rays of the LED lamp beads are refracted through the outer edge of the protruding portion and then are emitted to the annular portion, then part of light rays are reflected by the annular portion and then are emitted to the protruding portion again, and the light rays are reflected by the protruding portion and then are emitted to the annular portion again. The light is mixed uniformly after being reflected for many times between the protruding part and the annular part, the light after being mixed uniformly is emitted from the outer surface of the cover body, the cover body is used for fully mixing the light entering the cover body, and the light emitted through the cover body is uniform.
2. The protruding parts are distributed in a step shape along the direction facing the opening part, part of light rays entering the cover body are diffused to the outer edge of the step after passing through the step, and then are emitted to the annular part after passing through the outer edge of the step, and the protruding parts are distributed in a step shape, so that the light rays reflected by the annular part are reflected again after passing through the outer edge of the step.
3. Light of the LED lamp beads enters from the direction of the cover body towards the opening, the light is stronger and stronger on the cover body along the direction of the opening, and the diameter of the cylindrical step is reduced along the direction of the opening, so that the distance between the cylindrical step and the annular part along the direction of the opening is increased, the mixing distance of the light between the cylindrical step and the annular part is increased, and the light can be mixed conveniently.
4. The annular parts are concentrically distributed in a step shape along the direction facing the opening part, and as the protruding parts are distributed in a step shape, a concave cavity is formed between the protruding parts and the annular parts, and light is repeatedly reflected and mixed in the concave cavity between the protruding parts and the annular parts.
5. The diameter of the annular step is increased along the direction facing the opening part, the distance between the protruding part facing the opening part and the annular part is further increased, and the light rays approaching the first side direction are further uniformly mixed.
6. Be equipped with first support convex part on the inner wall of the cover body, first support convex part supports the cover body, prevents that the cover body from pressing the LED lamp pearl.
7. The outer surface of the cover body is provided with a second supporting convex part which supports the diffusion plate, the optical film and the like positioned at the front side of the cover body and prevents the diffusion plate, the optical film and the like from sinking to one side of the cover body.
8. The edge of the cover body is square, and the square design is convenient for splicing the adjacent cover bodies.
9. The outer surface of the cover body is provided with convex-concave patterns, so that the light emitted by the cover body is more uniform.
10. At least one of the corners is provided with a notch on the side edge, which is convenient for the installation and the disassembly of the light diffusion component.
11. The extinction layer is arranged on the outer surface of the cover body, and can weaken the brightness of the light rays emitted by the extinction layer, so that the brightness of the light rays emitted by the cover body is more uniform.
12. The part of light of the LED lamp beads does not pass through the bulge and directly emits into the edge part of the cover body, and is directly emitted from the outer surface of the cover body through the edge part, the brightness of the emitted light is stronger, the diameter of the extinction net point of the annular extinction layer close to the edge of the cover body is larger, the annular extinction layer at the position can weaken the brightness of the light with stronger brightness, and the uneven brightness of the light emitted from the edge and the mixed light is avoided.
13. The closer to the center of the cover body, the smaller the diameter of the extinction net point of the annular extinction layer, the light emitted by the extinction net point is mixed by the protruding part and the annular part, the brightness of the light is relatively uniform, and the light is more uniform after passing through the annular extinction layer.
14. The second groove is arranged in the middle of the outer surface of the cover body and corresponds to the protruding portion, the protruding portion of the cover body is similar to a convex lens, light emitted by the LED lamp beads is converged, the brightness of the light at the protruding portion is higher, the second groove of the cover body is similar to a concave lens, and after the light enters the second groove, the second groove diffuses the converged light, so that the light which directly enters the outer surface of the cover body through the protruding portion is prevented from being higher in brightness.
15. The light diffusion component of the interactive intelligent flat plate covers the LED lamp beads, the light diffusion component mixes light rays of the LED lamp beads and emits the mixed light rays, the light rays emitted by the light diffusion component are uniform in brightness, the diffusion plate is abutted with the light diffusion component, the optical diaphragm is located between the display screen and the diffusion plate, the light diffusion component supports the diffusion plate and the optical diaphragm, and the diffusion plate and the optical diaphragm are prevented from sinking.
16. The head of the LED lamp bead is positioned in the first groove, and the tail of the LED lamp bead is exposed out of the first groove; part of light rays of the LED lamp beads directly enter the cover body through the protruding parts, and part of light rays of the LED lamp beads directly enter the outer area of the protruding parts of the cover body; part of light entering the cover body is directly refracted out from the outer surface of the cover body, part of light entering the cover body enters the cavity of the cover body through the protruding part or the annular part or the edge part to be mixed, and the mixed light is emitted after being uniformly mixed.
17. The second supporting convex part protrudes towards the direction far away from the opening part, the light diffusion component supports the diffusion plate and the optical film through the second supporting convex part, and the protruding second supporting convex part can not influence the light guiding of the light diffusion component and the mixing of light rays when supporting the diffusion plate and the optical film.
18. The light homogenizing layer is arranged on the surface of the substrate, and the brightness of the light rays of the protruding part is weakened through the light homogenizing layer, so that the brightness of the light rays emitted through the cover body is uniform.
19. The convex part of the light diffusion component forms a light receiving part of the cover body, the annular part forms a light mixing part of the cover body, the outer edge of the light receiving part forms a first light guide surface, the surface of the light mixing part forms a second light guide surface, a light mixing cavity is formed between the first light guide surface and the second light guide surface, light rays of the LED lamp beads enter the cover body through the light receiving part, part of the light rays enter the light mixing cavity through the first light guide surface of the light receiving part, after contacting the second light guide surface, part of the light rays enter the light mixing cavity again after being reflected by the second light guide surface, after contacting the first light guide surface again, part of the light rays enter the light mixing cavity again after being reflected by the first light guide surface, the light rays are uniformly reflected and mixed in the light mixing cavity between the first light guide surface and the second light guide surface, the mixed light rays enter the outer surface of the cover body, and the cover body fully mixes the light rays entering the inside, so that the light rays passing through the cover body are uniform.
Drawings
FIG. 1 is a partial cross-sectional view of an interactive smart tablet according to an embodiment of the present invention;
fig. 2 is a front view of a light diffusing member according to an embodiment of the present invention;
FIG. 3 is a partial light path diagram of a light diffusing member according to an embodiment of the present invention;
FIG. 4 is a top view of a light diffusing member according to an embodiment of the present invention;
FIG. 5 is a bottom view of a light diffusing member according to an embodiment of the present invention;
The drawings of the light diffusion member of the present embodiment are drawings in which the light diffusion member is made of a non-transparent material;
Reference numerals illustrate:
100. a light diffusion member; 200. LED lamp beads; 110. a protruding portion; 120. an annular portion; 111. a first groove; 112. a first light guide surface; 121. a second light guide surface; 130. a cavity; 140. an edge portion; 150. a light homogenizing layer; 160. a second groove; 141. a corner; 170. a first supporting protrusion; 180. protruding ridges; 181. convex-concave lines; 190. a second supporting protrusion; 191. a support part; 142. a notch; 300. a display screen; 400. a substrate; 500. a diffusion plate; 600. an optical film; 700. a glass screen; 800. a back plate; 900. and a frame.
Detailed Description
The following describes embodiments of the present invention in detail.
As shown in fig. 2, the present embodiment discloses a light diffusing member 100, and the light diffusing member 100 is a cover made of a transparent material. As shown in fig. 3, the cover has a cavity 130, and the cavity 130 has an opening; the middle part of the inner wall of the cover body facing the direction of the opening part is convexly provided with a convex part 110, the inner wall of the cover body is provided with an annular part 120 along the radial outward area of the convex part 110, and a cavity 130 is formed between the annular part 120 and the convex part 110. The top end of the protruding portion 110 is provided with a first groove 111, when the light diffusion component 100 is used on the interactive intelligent tablet, the LED lamp beads are at least partially located inside the first groove 111, preferably, the heads of the LED lamp beads are located inside the first groove 111, and the tails of the LED lamp beads are exposed out of the first groove 111.
The above-mentioned "radial direction" means a straight direction along a diameter or radius, or a straight direction perpendicular to an axis, and the above-mentioned "radial outward" means a region outward along a straight direction of a radius of the convex portion 110, that is, a direction extending along an outer edge of the convex portion 110 toward an edge of the cover.
In this embodiment, the light of the LED lamp bead 200 enters from the direction of the cover facing the opening, and is emitted from the outer surface of the cover, and the cover has a light guiding effect on the light of the light source because the light diffusion component 100 is made of transparent material, and the light is refracted from different directions of the outer surface of the cover after being reflected in the cover, so that the uniformity of the light is improved.
In this embodiment, the surface of the first groove 111 of the protruding portion 110 is spherical, the protruding portion 110 of the cover is similar to a convex lens, the light emitted by the LED lamp bead 200 is converged toward the protruding portion 110, and part of the light converged at the protruding portion 110 is diffused toward the annular portion 120 through the protruding portion 110 during the process of refracting toward the outer surface of the cover, so that the light is mixed.
As shown by the arrow in fig. 3, part of the light of the LED lamp bead 200 enters the cover body and then directly exits from the outer surface of the cover body, part of the light of the LED lamp bead 200 is refracted by the outer edge of the protruding portion 110 and then exits toward the annular portion 120, then part of the light is reflected by the annular portion 120 and exits toward the protruding portion 110 again, and the light is reflected by the protruding portion 110 and exits toward the annular portion 120 again. The light is uniformly mixed after being reflected for many times between the protruding part 110 and the annular part 120, the uniformly mixed light is emitted from the outer surface of the cover body, and the cover body is fully mixed with the light entering the cover body, so that the light emitted through the cover body is uniform.
In the present embodiment, the protruding portion 110 forms a light receiving portion of the cover, and the annular portion 120 forms a light mixing portion of the cover; the light receiving part protrudes towards the direction of the opening part; the first light guiding surface 112 is formed on the outer edge of the light receiving portion, the second light guiding surface 121 is formed on the surface of the light mixing portion, and a light mixing cavity is formed between the first light guiding surface 112 and the second light guiding surface 121, that is, the cavity 130 of the cover body is the light mixing cavity.
The light of the LED lamp bead 200 enters the cover body through the light receiving part, part of the light enters the light mixing cavity through the first light guide surface 112 of the light receiving part, part of the light entering the light mixing cavity contacts the second light guide surface 121, then enters the light mixing cavity again after being reflected by the second light guide surface 121, part of the light entering the light mixing cavity 130 contacts the first light guide surface 112 again after being reflected by the first light guide surface 112, then enters the light mixing cavity again, the light is reflected and mixed uniformly for many times in the light mixing cavity between the first light guide surface 112 and the second light guide surface 121, the mixed light is emitted from the outer surface of the cover body, and the cover body sufficiently mixes the light entering the light mixing cavity, so that the light emitted by the cover body is uniform.
In this embodiment, the protruding portions 110 are distributed in a stepped manner along the direction toward the opening, and the protruding portions 110 are cylindrical or conical steps, preferably, the protruding portions 110 are formed by stacking at least two concentric cylindrical steps. The diameter of the cylindrical step is reduced in a direction toward the opening.
Part of the light entering the cover body is diffused to the outer edge of the step after passing through the cylindrical or conical step, and then is emitted to the annular part 120 after passing through the outer edge of the step. The protruding portions 110 are distributed in a stepped shape, so that the light reflected by the annular portion 120 is reflected again after passing through the outer edge of the step. Light of the LED lamp bead 200 enters from the direction of the cover body toward the opening, the light is stronger and stronger on the cover body along the direction toward the opening, and the diameter of the cylindrical step is reduced along the direction toward the opening, so that the distance between the cylindrical step and the annular portion 120 along the direction toward the opening is increased, the mixing distance of the light between the cylindrical step and the annular portion 120 is increased, and the light can be mixed thoroughly.
The annular portions 120 are concentrically distributed in an annular step shape along a direction toward the opening portion, and a center of the annular step is on the same line as a central axis of the protruding portion 110. The annular portion 120 of this embodiment is preferably formed by at least two concentric annular steps, and the width of the annular step near the protruding portion 110 is greater than the width of the annular step far from the protruding portion 110. In this embodiment, since the protruding portions 110 are distributed in a step shape, the annular portion 120 is distributed in an annular step shape, the light mixing cavity between the protruding portions 110 and the annular portion 120 is a concave cavity recessed toward the outer surface of the cover body, and the light is repeatedly reflected and mixed in the light mixing cavity between the protruding portions 110 and the annular portion 120. The diameter of the annular step increases in the direction toward the opening portion, further increasing the distance between the protruding portion 110 and the annular portion 120 in the direction toward the opening portion.
As shown in fig. 5, the cover further includes an edge portion 140, where the edge portion 140 is located in a radially outward region of the annular portion 120, and the edge portion 140 protrudes toward the opening with respect to the annular portion 120. Part of the light of the LED lamp beads 200 enters the cover body and then directly enters the edge part 140; some of the light enters the edge portion 140 after being refracted by the protruding portion 110, the light enters the annular portion 120 or enters the protruding portion 110 after being reflected by the edge portion 140, and then the light is mixed between the annular portion 120 and the protruding portion 110 by multiple reflections.
As shown in fig. 4, the edge 140 is square, the side length of the square is preferably 38.8mm, the edge 140 includes four corners 141, and a notch is provided at the side of at least one corner 141, so that the cover body can be conveniently mounted and dismounted through the notch.
In order to make the brightness of the light passing through the cover more uniform, as shown in fig. 4, a ridge 180 is formed on the outer surface of the cover along at least a partial area in the direction of the center of the cover toward the corner 141, and a convex-concave pattern 181 is provided on the ridge 180, and the convex-concave pattern 181 makes the light passing through it more uniform.
As shown in fig. 4, at least two rings of the annular extinction layer 150 surrounding the center of the mask are provided on the outer surface of the mask, the annular extinction layer 150 includes a plurality of extinction dots, and the diameter of the extinction dots of the annular extinction layer 150 near the edge of the mask is larger than the diameter of the extinction dots of the annular extinction layer 150 near the center of the mask. Part of the light rays of the LED lamp beads 200 do not pass through the protruding portions 110 and directly enter the edge portions 140 of the cover body, and are directly emitted from the outer surface of the cover body through the edge portions 140, the brightness of the light rays directly emitted from the outer surface of the cover body is high, and the annular extinction layer 150 on the outer surface of the cover body can weaken the brightness of the light rays emitted through the annular extinction layer, so that the brightness of the light rays emitted through the outer surface of the cover body is more uniform. The diameter of the extinction net point of the annular extinction layer 150 positioned at the edge portion 140 of the cover body is larger, the annular extinction layer 150 at the position can weaken the brightness of the light with stronger brightness at the edge portion 140, uneven brightness of the light emitted from the edge portion 140 and the mixed light is avoided, the diameter of the extinction net point is smaller near the center of the cover body, the light emitted from the position is mixed through the protruding portion 110 and the annular portion 120, the brightness of the light is relatively uniform, and the light is more uniform after passing through the annular extinction layer 150.
In this embodiment, a second groove 160 is disposed in the middle of the outer surface of the cover, and the second groove 160 corresponds to the protrusion 110. The convex portion 110 of the cover body is similar to a convex lens, and converges light emitted by the LED lamp beads 200, so that the brightness of the light at the convex portion 110 is higher, the second groove 160 of the cover body is similar to a concave lens, and after the light enters the second groove 160, the second groove 160 diffuses the converged light, so that the brightness of the light directly emitted from the second groove 160 after passing through the convex portion 110 is higher.
In order to prevent the light diffusion member 100 from crushing the LED lamp beads 200, at least three first support protrusions 170 are provided on the inner wall of the housing, the first support protrusions 170 protrude toward the opening with respect to the annular portion 120, and the first support protrusions 170 support the housing. The number of the first supporting protrusions 170 is preferably four, the four first supporting protrusions 170 are uniformly distributed on the cover body, the height of the first supporting protrusions 170 is preferably 0.5mm, the distance between two opposite sides of the first supporting protrusions 170 is preferably 1.38mm, and the distance between two adjacent first supporting protrusions 170 is preferably 25mm.
At least three second supporting protrusions 190 are provided on the outer surface of the cover, and preferably four second supporting protrusions 190 are provided. Four second support protrusions 190 are distributed around the second groove 160, the second support protrusions 190 protruding in a direction away from the mouth. The second supporting protrusion 190 has a protruding supporting portion 191 at one end thereof, and a distance between the top of the supporting portion 191 and the bottom of the first supporting protrusion 170 is preferably 6mm.
As shown in fig. 1, the present embodiment further discloses a backlight assembly, which includes a substrate 400, an LED lamp bead 200 and the light diffusion component 100 described above, where the LED lamp bead 200 is disposed on the substrate 400, the light diffusion component 100 is covered on the LED lamp bead 20, the LED lamp bead 200 is at least partially located in the first groove 111, preferably, the head of the LED lamp bead 200 is located in the first groove 111, and the tail of the LED lamp bead 200 is exposed out of the first groove 111.
In the backlight assembly, part of light of the LED lamp beads 200 directly enters the cover body through the protruding part 110; part of the light of the LED lamp beads 200 directly enters the outer area of the protruding part 110 of the cover body; part of light entering the cover body is directly refracted out from the outer surface of the cover body; part of the light entering the cover body enters the cavity 130 through the bulge 110, is uniformly mixed in the cavity 130 under the reflection of the bulge 110 and the annular part 120, and is emitted; part of the light entering the cover body enters the cavity 130 through the annular part 120 or the edge part 140, and is uniformly mixed in the cavity 130 under the reflection of the convex part 110 and the annular part 120 and then is emitted; part of the light is emitted from the outer surface of the cover body in the mixing process.
As shown in fig. 1, this embodiment further discloses an interactive intelligent tablet, which includes a display screen 300, a substrate 400, an LED lamp bead 200, a diffusion plate 500, an optical film 600, and the aforementioned light diffusion component 100, where the LED lamp bead 200 is disposed on the substrate 400, the light diffusion component 100 covers the LED lamp bead 200, the LED lamp bead 200 is at least partially located in the first groove 111, preferably, the head of the LED lamp bead 200 is located in the first groove 111, and the tail of the LED lamp bead 200 is exposed out of the first groove 111; the diffusion plate 500 is in contact with the light diffusion member 100, and the optical film 600 is positioned between the display panel 300 and the diffusion plate 500.
In this interactive intelligent tablet, light diffusion component 100 mixes the light of LED lamp pearl 200 and emits, makes the light luminance that sends out through light diffusion component 100 even, and the light that sends out through the cover body is more even through diffuser plate 500 and optical film 600 back light, makes the display effect of display screen 300 better. The second supporting protrusion 190 of the light diffusion member 100 supports the diffusion plate 500 and the optical film 600, preventing the diffusion plate 500 and the optical film 600 from being concave.
The interactive intelligent tablet of this embodiment further includes a glass screen 700, a back plate 800 and a frame 900, wherein the glass screen 700 is located at the front side of the display screen 300, the back plate 800 is located at the rear side of the substrate 400, the substrate 400 is fixed on the back plate 800, and the glass screen 700, the display screen 300, the optical film 600, the diffusion plate 500 and the back plate 800 are fixed through the frame 900.
The LED lamp beads 200 and the light diffusion members 100 are all multiple, the LED lamp beads 200 and the light diffusion members 100 are uniformly distributed on the substrate 400, the corners 141 of the adjacent four light diffusion members 100 are opposite, and the side edges of the adjacent two light diffusion members 100 are close to each other.
A light equalizing layer (not shown) is provided on the surface of the substrate 400, and corresponds to the light diffusing member 100. The color of the light equalizing layer corresponding to the annular portion 120 is darker than the color of the light equalizing layer corresponding to the protruding portion 110 or the edge portion 140; or the density of the light equalizing layer corresponding to the annular portion 120 is greater than that of the light equalizing layer corresponding to the protruding portion 110 or the edge portion 140. In this embodiment, the light uniformity layer weakens the brightness of the light emitted from the protruding portion 110 or the edge portion 140, so that the brightness of the light emitted from the cover body is uniform.
The foregoing is merely exemplary embodiments of the present invention, and is not intended to limit the scope of the present invention; any substitutions and modifications made without departing from the spirit of the invention are within the scope of the invention.

Claims (24)

1. The interactive intelligent panel is characterized by comprising a display screen, a substrate, LED lamp beads, a diffusion plate, an optical diaphragm and a light diffusion component, wherein the LED lamp beads are arranged on the substrate, and the light diffusion component is covered on the LED lamp beads; the diffusion plate is abutted against the light diffusion component, and the optical film is positioned between the display screen and the diffusion plate;
The light diffusion component is a cover body made of transparent materials, the cover body is provided with a cavity, and the cavity is provided with an opening part; a convex part is convexly arranged at the middle part of the inner wall of the cover body towards the direction of the opening part, an annular part is arranged on the inner wall of the cover body, and the cavity is formed between the annular part and the convex part; the top of protrusion is provided with first recess, the LED lamp pearl is at least partly located in the first recess.
2. The interactive smart tablet of claim 1, wherein the protrusions are distributed in a stepped manner along a direction toward the opening.
3. The interactive smart tablet of claim 2, wherein the protrusion is a cylindrical or conical step.
4. The interactive smart tablet of claim 2, wherein the protrusion is a superposition of at least two concentric cylindrical steps.
5. The interactive smart tablet of claim 4, wherein the diameter of the cylindrical step decreases in a direction toward the opening.
6. The interactive smart tablet of claim 1, wherein the annular portions are concentrically annular step-like distributed along a direction toward the opening.
7. The interactive smart tablet of claim 6, wherein a center of the annular step is collinear with a central axis of the protrusion.
8. The interactive smart tablet of claim 6, wherein the annular portion is formed by at least two concentric annular steps joined together.
9. The interactive smart tablet of claim 6, wherein a width of the annular step proximate the protrusion is greater than a width of the annular step distal from the protrusion.
10. The interactive smart tablet of claim 8, wherein a diameter of the annular step increases in a direction toward the opening.
11. The interactive smart tablet of any one of claims 1-10, wherein at least three first support protrusions are provided on the cover, the first support protrusions protruding with respect to the annular portion in a direction toward the opening.
12. The interactive smart tablet of any one of claims 1-10, wherein at least three second support protrusions are provided on an outer surface of the housing, the second support protrusions protruding away from the opening.
13. The interactive smart tablet of any one of claims 1-10, wherein the cover further comprises a rim portion, the rim portion being square, the rim portion comprising four corners.
14. The interactive smart tablet of claim 13, wherein the exterior surface of the cover has embossments disposed thereon along a center of the cover toward the corners.
15. The interactive smart tablet of claim 13, wherein a notch is provided in a side edge of at least one of the corners.
16. An interactive smart tablet according to any one of claims 1 to 10, wherein at least two rings of annular matting layer are provided on the outer surface of the cover around the centre of the cover.
17. The interactive smart tablet of claim 16, wherein the annular matting layer comprises matting dots having a greater diameter near the edge of the cap than the matting dots of the annular matting layer near the center of the cap.
18. The interactive smart tablet of any one of claims 1-10, wherein a second groove is provided in a middle portion of the outer surface of the housing, the second groove corresponding to the protrusion.
19. The interactive smart tablet of claim 1, wherein a head of the LED light bead is positioned within the first recess and a tail of the LED light bead is exposed from the first recess.
20. The interactive smart tablet of claim 1, wherein at least three second support protrusions are provided on an outer surface of the housing, the second support protrusions protruding in a direction away from the opening; the second supporting protrusion is used for supporting the diffusion plate and the optical film.
21. The interactive intelligent tablet of claim 1, wherein a light equalizing layer is disposed on a surface of the substrate, the light equalizing layer corresponding to the light diffusing member.
22. The interactive smart tablet of claim 21, wherein the light balancing layer corresponding to the ring is darker in color than the light balancing layer corresponding to the protrusion; or the density of the light-equalizing layer corresponding to the annular part is greater than that of the light-equalizing layer corresponding to the convex part.
23. The interactive smart tablet of claim 1, wherein the cover comprises an edge portion, the edge portion being square, the edge portion comprising four corners; the LED lamp beads and the light diffusion components are uniformly distributed on the substrate, the corners of the adjacent four light diffusion components are opposite, and the sides of the adjacent two light diffusion components are close to each other.
24. The interactive smart tablet of claim 1, further comprising a glass screen, a back plate, and a bezel, the glass screen positioned on the front side of the display screen, the back plate positioned on the back side of the substrate, the substrate secured to the back plate, the glass screen, the display screen, the optical film, the diffuser plate, and the back plate secured by the bezel.
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