WO2021063055A1 - Light diffusion component, backlight assembly and interactive smart tablet - Google Patents

Abstract

Disclosed in the embodiments of the present application are a light diffusion component, a backlight assembly and an interactive smart tablet. The light diffusion component is a cover made of a transparent material, the cover is provided with a cavity, and the cavity is provided with an opening portion; a protruding portion is provided at the middle portion on an inner wall of the cover that faces the direction of the opening portion, the inner wall of the cover is provided with an annular portion, and the cavity is formed between the annular portion and the protruding portion; and a top end of the protruding portion is provided with a first groove. The light diffusion component provided in the embodiments of the present application fully uniformly mixes light that passes therethrough and then emits the light.

Description

Light diffusion component, backlight assembly and interactive smart tablet

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910941680.X, and the invention title is "Light Diffusion Components, Backlight Components and Interactive Smart Tablets" on September 30, 2019, the entire contents of which are incorporated by reference Incorporated in this application.

Technical field

This application relates to the field of backlight modules, and more specifically, to a light diffusion component, a backlight assembly and an interactive smart tablet.

Background technique

The backlight module is one of the key parts of the LCD panel. Its function is to supply sufficient brightness and uniformly distributed light sources so that the LCD panel can display images normally. The backlight module is mainly composed of light sources, light guide plates, optical films, and plastics. The light source is generally an LED lamp, and the light of the LED lamp is emitted to the display panel after passing through the light guide plate and the optical film. However, the prior art has the following problems: the light of the LED lamp passes through the light guide plate and the light is mixed The lack of uniformity results in poor uniformity of the light emitted to the display panel, which affects the display effect of the display.

Summary of the invention

The purpose of the present application is to provide a light diffusing component, a backlight assembly and an interactive smart panel, the light diffusing component fully mixes and uniformly emits the light passing through it.

According to one aspect of the embodiments of the present application, a light diffusion member is disclosed. The light diffusion member is a cover made of a transparent material, the cover has a cavity, and the cavity has an opening; the inner wall of the cover has a protrusion in the middle in the direction of the opening. An annular part is provided on the inner wall of the cover body, and the cavity is formed between the annular part and the protruding part; the top of the protruding part is provided with a first groove.

The protrusions are distributed stepwise along the direction toward the opening.

The protruding part is a cylindrical or conical step.

The protruding part is formed by superimposing at least two concentric cylindrical steps.

The diameter of the cylindrical step is reduced in a direction toward the opening.

The annular portion is distributed in a concentric annular step shape along a direction toward the opening portion.

The center of the annular step and the central axis of the protruding portion are on the same straight line.

The annular portion is formed by connecting at least two concentric annular steps.

The width of the annular step close to the protrusion is greater than the width of the annular step far from the protrusion.

The diameter of the annular step increases in a direction toward the opening.

At least three first support protrusions are provided on the cover, and the first support protrusions protrude in a direction toward the opening with respect to the ring-shaped portion.

At least three second support protrusions are provided on the outer surface of the cover, and the second support protrusions protrude in a direction away from the opening.

The cover body further includes an edge portion, the edge portion has a square shape, and the edge portion includes four corners.

Concave and convex patterns are provided on the outer surface of the cover body along the direction from the center of the cover body toward the corners.

A notch is provided on the side of at least one of the corners.

At least two ring-shaped matting layers surrounding the center of the cover are provided on the outer surface of the cover.

The ring-shaped matting layer includes matting dots, and the diameter of the matting dots of the ring-shaped matting layer near the edge of the cover is larger than the diameter of the matting dots of the ring-shaped matting layer near the center of the cover.

A second groove is provided in the middle of the outer surface of the cover, and the second groove corresponds to the protrusion.

According to another aspect of the embodiments of the present application, a backlight assembly is also disclosed. The backlight assembly includes a substrate, LED lamp beads, and any of the aforementioned light diffusing components. The LED lamp beads are arranged on the substrate, the light diffusing component is covered on the LED lamp beads, and the LED The lamp bead is at least partially located in the first groove.

According to another aspect of the embodiments of the present application, an interactive smart tablet is also disclosed. The interactive smart panel includes a display screen, a substrate, LED lamp beads, a diffuser plate, an optical film, and any of the aforementioned light diffusion components. The LED lamp beads are arranged on the substrate, and the light diffusion component is covered On the LED lamp bead, the LED lamp bead is at least partially located in the first groove; the diffuser plate abuts the light diffusing component, and the optical film is located between the display screen and the diffuser. Between the boards.

The head of the LED lamp bead is located in the first groove, and the tail of the LED lamp bead is exposed in the first groove.

At least three second support protrusions are provided on the outer surface of the cover, and the second support protrusions protrude in a direction away from the opening; the second support protrusions are used to support the Diffusion plate and the optical film.

A homogenizing layer is provided on the surface of the substrate, and the homogenizing layer corresponds to the light diffusing component.

The color of the homogenizing layer corresponding to the annular portion is darker than the color of the homogenizing layer corresponding to the protrusion; or, the homogenizing layer corresponding to the annular portion The density of the layer is greater than the density of the homogenizing layer corresponding to the protrusion.

The cover body includes an edge portion, the edge portion has a square shape, and the edge portion includes four corners; each of the LED lamp beads and the light diffusion member is multiple, and the LED lamp beads and the light diffusion member are multiple They are evenly distributed on the substrate, the corners of the four adjacent light diffusion components are opposite, and the sides of the two adjacent light diffusion components are close to each other.

The interactive smart tablet further includes a glass screen, a back plate, and a frame, the glass screen is located on the front side of the display screen, the back plate is located on the back side of the substrate, and the substrate is fixed on the back plate, The glass screen, the display screen, the optical film, the diffusion plate and the back plate are installed and fixed by the frame.

According to another aspect of the embodiments of the present application, another light diffusion component is also disclosed. The light diffusion member is a cover made of a transparent material, the cover has a cavity, and the cavity has an opening; the inner wall of the cover is provided with a protruding portion in the middle in the direction of the opening, The protruding portion constitutes the light receiving portion of the cover body, an annular portion is provided on the inner wall of the cover body, and the ring portion constitutes the light mixing portion of the cover body; The direction of the opening portion is convex; a first light guide surface is formed on the outer edge of the light receiving portion, a second light guide surface is formed on the surface of the light mixing portion, the first light guide surface and the second light guide surface A light mixing cavity is formed therebetween, and a first groove is provided at the top of the protruding part.

The advantages or principles of this application are described below:

1. The light diffusion component is a cover made of transparent material, and a first groove is provided at the top of the protruding part of the cover; when the light diffusion component is used on a smart interactive tablet, the light diffusion component is covered on the LED lamp The head of the LED lamp bead is located in the first groove, and the tail of the LED lamp bead is exposed in the first groove; the light of the LED lamp bead enters from the direction of the cover to the opening, and comes from the outside of the cover. The surface is emitted, and the cover has a light guiding effect on the light of the light source. The light is refracted from different directions on the outer surface of the cover after being reflected in the cover, which improves the uniformity of the light. The inner wall of the cover is provided with a convex part. The surface of the first groove of the convex part is spherical. The convex part of the cover is similar to a convex lens. The light emitted by the LED lamp bead converges to the convex part, and partly converges on the convex part. When the light from the protruding part is refracted to the outer surface of the cover, the light passes through the protruding part and diffuses toward the annular part to mix the light.

Part of the light of the LED lamp bead enters the cover body and directly exits from the outer surface of the cover. Part of the light of the LED lamp bead is refracted by the outer edge of the protruding part and then exits to the ring part, and then part of the light is reflected by the ring part It is emitted to the convex part again, and the light is emitted to the annular part again after being reflected by the convex part. The light is evenly mixed after multiple reflections between the protruding part and the ring part. The evenly mixed light is emitted from the outer surface of the cover, and the cover fully mixes the light entering the inside to make the light emitted through the cover More evenly.

2. The protrusions are distributed stepwise along the direction toward the opening. Part of the light entering the cover diffuses to the outer edge of the step after passing through the step, and then shoots out to the annular part through the outer edge of the step, and the protrusion is a step Shaped distribution, so that the light reflected by the ring part will be reflected again after passing through the outer edge of the step.

3. The light of the LED lamp bead enters from the direction of the cover toward the opening, and the light on the cover becomes stronger and stronger along the direction toward the opening, and the diameter of the cylindrical step decreases in the direction toward the opening, thus As a result, the distance between the cylindrical step and the annular portion increases in the direction toward the opening, and the mixing distance of the light between the cylindrical step and the annular portion increases, which facilitates the sufficient mixing of the light.

4. The ring part is distributed in a concentric annular stepped shape along the direction toward the opening, and because the protrusions are stepped, a cavity is formed between the protrusion and the ring, and the light beams between the protrusion and the ring. Repeated reflection and mixing in the cavity between the shaped parts.

5. The diameter of the annular step increases along the direction toward the opening, which further increases the distance between the protruding portion and the annular portion in the direction toward the opening, and further makes the light in the direction close to the first side uniformly mixed.

6. The inner wall of the cover body is provided with a first support convex portion, which supports the cover body to prevent the cover body from crushing the LED lamp beads.

7. A second supporting protrusion is provided on the outer surface of the cover. The second supporting protrusion supports the diffuser and optical film on the front side of the cover to prevent the diffuser and the optical film from turning to the cover. Sunken on one side.

8. The edge of the cover is square, and the square design facilitates the splicing of adjacent covers.

9. The outer surface of the cover is provided with convex and concave patterns, which make the light emitted through it more uniform.

10. A notch is provided on the side of at least one corner, and the notch is convenient for the installation and disassembly of the light diffusion component.

11. A matting layer is provided on the outer surface of the cover. The matting layer can weaken the brightness of the light emitted through it, and make the brightness of the light emitted through the cover more uniform.

12. Part of the light of the LED lamp beads does not pass through the protruding part, but is directly emitted into the edge of the cover, and is directly emitted from the outer surface of the cover through the edge. The brightness of the emitted light is strong, close to the edge of the cover. The diameter of the matting dots of the ring-shaped matting layer is larger, and the ring-shaped matting layer at this location can weaken the brightness of the stronger light, and avoid the unevenness of the brightness of the light emitted through the edge and the brightness of the mixed light.

13. The closer to the center of the cover, the smaller the diameter of the extinction dots of the ring-shaped extinction layer, the light emitted there has passed through the mixing of the protruding part and the ring part, and the brightness of the light is relatively uniform. After passing through the ring-shaped extinction layer Make the light more uniform.

14. A second groove is provided in the middle of the outer surface of the cover. The second groove corresponds to the protrusion. The protrusion of the cover is similar to a convex lens. The second groove of the cover is similar to a concave lens. After the light enters the second groove, the second groove diffuses the condensed light to prevent the brightness of the light directly entering the outer surface of the cover through the convex part. Higher.

15. The light diffusion component of the interactive smart panel is covered on the LED lamp bead. The light diffusion component mixes the light of the LED lamp bead and emits it, so that the brightness of the light emitted through the light diffusion component is uniform, and the diffusion plate and the light diffusion component offset In connection, the optical film is located between the display screen and the diffuser, and the light diffuser supports the diffuser and the optical film to prevent the diffuser and the optical film from sinking.

16. The head of the LED lamp bead is located in the first groove, and the tail of the LED lamp bead is exposed in the first groove; part of the light of the LED lamp bead directly enters the cover through the protruding part, and part of the light of the LED lamp bead directly enters The outer area of the convex part of the cover; part of the light entering the cover is directly refracted from the outer surface of the cover, and part of the light entering the cover enters the cavity of the cover through the convex part or the ring part or the edge part for mixing , And shoot after mixing uniformly.

17. The second supporting protrusion protrudes away from the opening. The light diffusion member supports the diffusion plate and the optical film through the second supporting protrusion, and the protruding second supporting protrusion supports the diffusion plate and the optical film. The sheet support will not affect the light guide and light mixing of the light diffusion component.

18. A homogenizing layer is provided on the surface of the substrate. The homogenizing layer weakens the brightness of the light from the protruding part, so that the brightness of the light emitted through the cover is uniform.

19. The protruding part of the light diffusion member constitutes the light receiving part of the cover, the ring part constitutes the light mixing part of the cover, the outer edge of the light receiving part forms the first light guide surface, and the surface of the light mixing part forms the second light guide Glossy surface, a light mixing cavity is formed between the first light guide surface and the second light guide surface, the light from the LED lamp beads enters the cover through the light receiving part, and part of the light enters the light mixing cavity through the first light guide surface of the light receiving part After entering the light mixing cavity, part of the light entering the light mixing cavity contacts the second light guide surface, and then enters the light mixing cavity again after being reflected by the second light guide surface. After entering the light mixing cavity again, part of the light entering the light mixing cavity contacts the first light guide surface and passes through The reflection of the first light guide surface enters the light mixing cavity again, and the light is reflected and mixed evenly in the light mixing cavity between the first light guide surface and the second light guide surface. The mixed light enters the outer surface of the cover and exits. , The cover fully mixes the light entering the inside, so that the light passing through the cover is more uniform.

Description of the drawings

FIG. 1 is a partial cross-sectional view of an interactive smart tablet according to an embodiment of the present application;

Fig. 2 is a front view of a light diffusion component according to an embodiment of the present application;

Fig. 3 is a partial light path diagram of a light diffusion component according to an embodiment of the present application;

Fig. 4 is a top view of a light diffusion component according to an embodiment of the present application;

Fig. 5 is a bottom view of a light diffusion component according to an embodiment of the present application;

The drawings of the light diffusing component of this embodiment are drawings in a non-transparent material;

Description of reference signs:

100. Light diffusion component; 200, LED lamp beads; 110, protruding part; 120, ring part; 111, first groove; 112, first light guide surface; 121, second light guide surface; 130, void Cavity; 140, edge portion; 150, ring-shaped matting layer; 160, second groove; 141, corner portion; 170, first supporting protrusion; 180, corrugation; 181, convex-concave pattern; 190, second supporting protrusion 191, support part; 142, notch; 300, display screen; 400, substrate; 500, diffuser plate; 600, optical film; 700, glass screen; 800, back plate; 900, frame.

Detailed ways

The embodiments of the present application will be described in detail below.

As shown in FIG. 2, this embodiment discloses a light diffusing component 100 which is a cover made of transparent material. As shown in FIG. 3, the cover has a cavity 130, and the cavity 130 has an opening; the inner wall of the cover is protruding with a protrusion 110 in the middle in the direction of the opening, and the inner wall of the cover is along the protruding part 110. The radially outward area is provided with an annular portion 120, and the cavity 130 is formed between the annular portion 120 and the protruding portion 110. A first groove 111 is provided at the top of the protrusion 110. When the light diffusion component 100 is used on an interactive smart tablet, the LED lamp bead is at least partially located inside the first groove 111, preferably the head of the LED lamp bead The part is located in the first groove 111, and the tail of the LED lamp bead is exposed in the first groove 111.

The above-mentioned "radial" refers to the linear direction along the diameter or radius, or the linear direction perpendicular to the axis, in the above-mentioned "radially outward" refers to the area outward along the linear direction of the radius of the protrusion 110, that is, along the convex The direction in which the outer edge of the out portion 110 extends toward the edge of the cover body.

In this embodiment, the light of the LED lamp bead 200 enters from the direction of the cover toward the opening, and exits from the outer surface of the cover. Because the light diffusion member 100 is a cover made of transparent material, the cover is opposite to the light source. The light has a light guiding function, and the light is refracted from different directions on the outer surface of the cover after being reflected in the cover, which improves the uniformity of the light.

In this embodiment, the surface of the first groove 111 of the protruding portion 110 is spherical, and the protruding portion 110 of the cover is similar to a convex lens. The light emitted by the LED lamp bead 200 converges toward the protruding portion 110, partially converging on When the light from the protruding portion 110 is refracted to the outer surface of the cover, the light passes through the protruding portion 110 and diffuses toward the annular portion 120 to mix the light.

As shown by the arrow in Fig. 3, part of the light from the LED lamp bead 200 enters the cover and directly exits from the outer surface of the cover. Part of the light from the LED lamp bead 200 is refracted by the outer edge of the protruding part 110 and then directed toward the ring part 120. After being emitted, part of the light is reflected by the annular portion 120 and then emitted to the convex portion 110 again, and the light is reflected by the convex portion 110 and then emitted to the annular portion 120 again. The light is evenly mixed after multiple reflections between the protruding part 110 and the ring-shaped part 120. The evenly mixed light is emitted from the outer surface of the cover, and the cover fully mixes the light entering its interior, so that it is emitted through the cover The light is more uniform.

In this embodiment, the protruding portion 110 constitutes the light-receiving portion of the cover, and the ring-shaped portion 120 constitutes the light-mixing portion of the cover; the light-receiving portion protrudes toward the direction of the opening; at the outer edge of the light-receiving portion A first light guide surface 112 is formed, and a second light guide surface 121 is formed on the surface of the light mixing portion. A light mixing cavity is formed between the first light guide surface 112 and the second light guide surface 121, that is, the cavity of the cover. 130 is a light mixing cavity.

The light of the LED lamp bead 200 enters the cover 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, and part of the light entering the light mixing cavity contacts the second light guide surface 121 and then passes through After being reflected by the second light guide surface 121, it enters the light mixing cavity again. After part of the light entering the light mixing cavity again contacts the first light guide surface 112, it enters the light mixing cavity again after being reflected by the first light guide surface 112. The multiple reflections in the light mixing cavity between the first light guide surface 112 and the second light guide surface 121 are uniformly mixed, and the mixed light is emitted from the outer surface of the cover, and the cover fully mixes the light entering its interior, so that The light emitted from the cover is more uniform.

In this embodiment, the protrusions 110 are distributed in steps along the direction toward the opening, and the protrusions 110 are cylindrical or conical steps. Preferably, the protrusions 110 are at least two concentric cylindrical shapes. The steps are superimposed. The diameter of the cylindrical step decreases in the direction toward the opening.

Part of the light entering the cover is diffused to the outer edge of the step after passing through the cylindrical or conical step, and then is emitted to the annular portion 120 through the outer edge of the step. The protruding portions 110 are distributed in a step-like manner, so that the light reflected by the ring portion 120 is reflected again after passing through the outer edge of the step. The light of the LED lamp bead 200 enters from the direction of the cover toward the opening, and the light on the cover becomes stronger and stronger along the direction toward the opening, and the diameter of the cylindrical step decreases in the direction toward the opening, resulting in The distance between the cylindrical step and the annular portion 120 increases along the direction toward the opening, and the mixing distance of the light between the cylindrical step and the annular portion 120 increases, which facilitates the sufficient mixing of the light.

The annular portion 120 is distributed in a concentric annular step shape along the direction toward the opening, and the center of the annular step and the central axis of the protruding portion 110 are on the same straight line. The annular portion 120 of this embodiment is preferably formed by connecting at least two concentric annular steps, and the width of the annular step close to the protruding portion 110 is greater than the width of the annular step far away from the protruding portion 110. In this embodiment, since the protrusions 110 are distributed in steps, and the annular part 120 is distributed in an annular step shape, the light mixing cavity between the protrusions 110 and the annular part 120 is a concave cavity recessed toward the outer surface of the cover. , The light is repeatedly reflected and mixed in the light mixing cavity between the protruding portion 110 and the ring portion 120. The diameter of the annular step increases in the direction toward the opening, further increasing the distance between the protruding portion 110 and the annular portion 120 in the direction toward the opening.

As shown in FIG. 5, the cover body further includes an edge portion 140, which is located in a radially outward area of the ring portion 120, and the edge portion 140 protrudes relative to the ring portion 120 toward the direction of the opening. Part of the light of the LED lamp bead 200 enters the rim 140 directly after entering the cover; part of the light enters the rim 140 after being refracted by the protrusion 110, and the light is reflected by the rim 140 and enters the ring 120 or enters the protrusion 110 , And then the light is reflected and mixed multiple times between the ring portion 120 and the protruding portion 110.

As shown in Fig. 4, the edge portion 140 is a square. Preferably, the side length of the square is 38.8mm. The edge portion 140 includes four corners 141. A notch 142 is provided on the side of at least one corner 141. The notch facilitates the installation and disassembly of the cover.

In order to make the brightness of the light passing through the cover more uniform, as shown in Figure 4, at least part of the area along the center of the cover towards the corner 141 is formed on the outer surface of the cover with a corrugated 180, where the corrugated There are convex-concave patterns 181 on the 180, and the convex-concave patterns 181 make the light emitted through it more uniform.

As shown in Figure 4, on the outer surface of the cover, there are at least two rings of ring-shaped matting layer 150 surrounding the center of the cover. The ring-shaped matting layer 150 includes a plurality of matting dots. The diameter of the dots is larger than the diameter of the matting dots of the ring-shaped matting layer 150 near the center of the cover. Part of the light of the LED lamp bead 200 does not pass through the protruding part 110, directly enters the edge 140 of the cover, and directly exits from the outer surface of the cover through the edge 140. The brightness of the light directly emitted from the outer surface of the cover is relatively bright. Strong, the ring-shaped matting layer 150 on the outer surface of the cover can weaken the brightness of the light emitted through it, and make the brightness of the light emitted through the outer surface of the cover more uniform. The ring-shaped matting layer 150 located at the edge portion 140 of the cover has a larger diameter of the matting dots. The ring-shaped matting layer 150 at this location can weaken the brightness of the brighter light at the edge portion 140 and avoid the brightness of the light emitted through the edge portion 140. The brightness of the mixed light is uneven. Close to the center of the cover, the diameter of the extinction dot is small. The light emitted therefrom has been mixed by the protrusion 110 and the ring 120, and the brightness of the light is relatively uniform. After passing through the ring-shaped matting layer 150, the light is more uniform.

In this embodiment, a second groove 160 is provided 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 is similar to a convex lens, which condenses the light emitted by the LED lamp bead 200, resulting in a higher brightness of the light on the convex portion 110. The second groove 160 of the cover is similar to a concave lens, and the light enters the second groove After 160, the second groove 160 diffuses the condensed light, preventing the light directly emitted from the second groove 160 after passing through the protrusion 110 from having high brightness.

In order to prevent the light diffusion member 100 from crushing the LED lamp bead 200, at least three first supporting protrusions 170 are provided on the inner wall of the cover, and the first supporting protrusions 170 protrude in the direction of the opening relative to the ring portion 120 , The first supporting protrusion 170 supports the cover. There are preferably four first support protrusions 170, and the four first support protrusions 170 are evenly distributed on the cover. Preferably, the height of the first support protrusions 170 is 0.5 mm, and the first support protrusions 170 are opposite to each other. The distance between the two sides of the two sides is 1.38 mm, and the distance between the adjacent first supporting protrusions 170 is 25 mm.

At least three second supporting protrusions 190 are provided on the outer surface of the cover, and there are also four second supporting protrusions 190. The four second supporting protrusions 190 are distributed around the second groove 160, and the second supporting protrusions 190 protrude in a direction away from the opening. One end of the second supporting protrusion 190 is provided with a protruding supporting part 191. Preferably, the distance from the top of the supporting part 191 to the bottom of the first supporting protrusion 170 is 6 mm.

As shown in FIG. 1, the embodiment of the present application also discloses a backlight assembly. The backlight assembly includes a substrate 400, LED lamp beads 200, and the aforementioned light diffusing component 100. The LED lamp beads 200 are arranged on the substrate 400 and the light is diffused. The 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 and The first groove 111.

In the backlight assembly, part of the light from the LED lamp bead 200 directly enters the cover through the protrusion 110; part of the light from the LED lamp 200 directly enters the outer area of the protrusion 110 of the cover; part of the light enters the cover directly It is refracted from the outer surface of the cover; part of the light entering the cover enters the cavity 130 through the protrusion 110, and is uniformly mixed in the cavity 130 under the reflection of the protrusion 110 and the ring 120, and then exits; enters the cover Part of the light from the body enters the cavity 130 through the ring portion 120 or the edge portion 140, and is uniformly mixed in the cavity 130 under the reflection of the protruding portion 110 and the ring portion 120, and then is emitted; part of the light is emitted from the cover during the mixing process The outer surface of the body shoots out.

As shown in FIG. 1, the embodiment of the present application also discloses an interactive smart tablet, which includes a display screen 300, a substrate 400, LED lamp beads 200, a diffusion plate 500, an optical film 600 and the aforementioned light diffusion The component 100, the LED lamp bead 200 is arranged on the substrate 400, the light diffusion component 100 is covered on the LED lamp bead 200, and 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, the tail of the LED lamp bead 200 is exposed from the first groove 111; the diffuser plate 500 abuts the light diffuser 100, and the optical film 600 is located between the display screen 300 and the diffuser plate 500.

In the interactive smart tablet, the light diffusion component 100 mixes the light of the LED lamp beads 200 and then emits it, so that the brightness of the light emitted through the light diffusion component 100 is uniform, and the light emitted through the cover passes through the diffusion plate 500 and the optics. The light behind the diaphragm 600 is more uniform, so that the display effect of the display screen 300 is better. The second supporting convex portion 190 of the light diffusion member 100 supports the diffusion plate 500 and the optical film 600 to prevent the diffusion plate 500 and the optical film 600 from sinking.

The interactive smart tablet of this embodiment further includes a glass screen 700, a back plate 800, and a frame 900. The glass screen 700 is located on the front side of the display screen 300, the back plate 800 is located on the back side of the substrate 400, and the substrate 400 is fixed on the back plate 800. The glass screen 700, the display screen 300, the optical film 600, the diffusion plate 500 and the back plate 800 are installed and fixed by the frame 900.

There are multiple LED lamp beads 200 and light diffusing components 100. The multiple LED lamp beads 200 and light diffusing components 100 are evenly distributed on the substrate 400. The corners 141 of four adjacent light diffusing components 100 are opposite, and two adjacent to each other. The sides of the light diffusion member 100 are close to each other.

A homogenizing layer (not shown in the figure) is provided on the surface of the substrate 400, and the homogenizing layer corresponds to the light diffusing component 100. The color of the uniform layer corresponding to the ring portion 120 is darker than the color of the uniform layer corresponding to the protruding portion 110 or the edge portion 140; or, the density of the uniform layer corresponding to the ring portion 120 is greater than that of The density of the uniform light layer corresponding to the protruding portion 110 or the edge portion 140. In this embodiment, the light homogenizing layer weakens the brightness of the light from the protruding portion 110 or the edge portion 140 to make the brightness of the light emitted through the cover uniform.

The above are only specific examples of this application, and do not limit the scope of protection of this application; any replacements and improvements made on the basis of not violating the concept of this application belong to the scope of protection of this application.

Claims (27)

1. A light diffusing component, wherein the light diffusing component is a cover made of a transparent material, the cover has a cavity, and the cavity has an opening; the inner wall of the cover faces the direction of the opening The middle portion of the hood is provided with a protruding portion, the inner wall of the cover is provided with an annular portion, and the cavity is formed between the annular portion and the protruding portion; the top end of the protruding portion is provided with First groove.
2. The light diffusion member according to claim 1, wherein the protrusions are distributed stepwise in a direction toward the opening.
3. The light diffusion member according to claim 2, wherein the protruding portion is a cylindrical or conical step.
4. 3. The light diffusion member according to claim 2, wherein the protruding part is formed by superimposing at least two concentric cylindrical steps.
5. The light diffusion member according to claim 4, wherein the diameter of the cylindrical step is reduced in a direction toward the opening.
6. The light diffusion member according to claim 1, wherein the ring-shaped portion is distributed in a concentric ring-shaped step shape along a direction toward the opening portion.
7. 7. The light diffusion member according to claim 6, wherein the center of the annular step and the central axis of the protrusion are on the same straight line.
8. 7. The light diffusion component according to claim 6, wherein the annular portion is formed by connecting at least two concentric annular steps.
9. 7. The light diffusing member according to claim 6, wherein the width of the annular step close to the protruding portion is greater than the width of the annular step far from the protruding portion.
10. 8. The light diffusion member according to claim 8, wherein the diameter of the annular step increases in a direction toward the opening.
11. The light diffusion member according to any one of claims 1 to 10, wherein at least three first support protrusions are provided on the cover, and the first support protrusions face relative to the annular portion The direction of the opening portion is convex.
12. The light diffusion member according to any one of claims 1 to 10, wherein at least three second support protrusions are provided on the outer surface of the cover, and the second support protrusions face away from the opening The direction of the part is convex.
13. The light diffusion member according to any one of claims 1 to 10, wherein the cover body further comprises an edge portion, the edge portion is square, and the edge portion includes four corners.
14. The light diffusion member according to claim 13, wherein the outer surface of the cover body is provided with concavo-convex patterns along the center of the cover body toward the corners.
15. The light diffusion member according to claim 13, wherein a notch is provided on the side of at least one of the corners.
16. The light diffusion component according to any one of claims 1 to 10, wherein at least two rings of annular matting layers surrounding the center of the cover are provided on the outer surface of the cover.
17. The light diffusion component according to claim 16, wherein the ring-shaped matting layer includes matting dots, and the diameter of the matting dots of the ring-shaped matting layer near the edge of the cover is larger than that of the center of the cover. The diameter of the matting dots of the ring-shaped matting layer.
18. The light diffusion component according to any one of claims 1 to 10, wherein a second groove is provided in the middle of the outer surface of the cover, and the second groove corresponds to the protrusion.
19. A backlight assembly, comprising a substrate, LED lamp beads, and the light diffusion component according to any one of claims 1 to 18, the LED lamp beads are arranged on the substrate, and the light diffusion component is covered on the substrate. On the LED lamp bead, the LED lamp bead is at least partially located in the first groove.
20. An interactive smart tablet, comprising a display screen, a substrate, LED lamp beads, a diffuser plate, an optical film, and the light diffusion component according to any one of claims 1 to 18, and the LED lamp beads are arranged on the substrate In the above, the light diffusion component is covered on the LED lamp bead, and the LED lamp bead is at least partially located in the first groove; the diffusion plate abuts the light diffusion component, and the optical diaphragm Located between the display screen and the diffusion plate.
21. The interactive smart tablet of claim 20, wherein the head of the LED lamp bead is located in the first groove, and the tail of the LED lamp bead is exposed in the first groove.
22. The interactive smart tablet of claim 20, wherein at least three second supporting protrusions are provided on the outer surface of the cover, and the second supporting protrusions protrude in a direction away from the opening; The second supporting protrusion is used to support the diffuser plate and the optical film.
23. 22. The interactive smart tablet according to claim 20, wherein a uniform light layer is provided on the surface of the substrate, and the uniform light layer corresponds to the light diffusion component.
24. The interactive smart tablet of claim 23, wherein the color of the uniform layer corresponding to the ring portion is darker than the color of the uniform layer corresponding to the protruding portion; or, The density of the uniform layer corresponding to the annular portion is greater than the density of the uniform layer corresponding to the convex portion.
25. The interactive smart tablet of claim 20, wherein the cover includes an edge portion, the edge portion is square, and the edge portion includes four corners; each of the LED lamp beads and the light diffusion component is multiple A plurality of the LED lamp beads and the light diffusion components are evenly distributed on the substrate, the corners of the four adjacent light diffusion components are opposite to each other, and the sides of the two adjacent light diffusion components are close to each other.
26. The interactive smart tablet of claim 20, wherein the interactive smart tablet further comprises a glass screen, a back plate, and a frame, the glass screen is located on the front side of the display screen, and the back plate is located on the back side of the substrate The substrate is fixed on the back plate, and the glass screen, the display screen, the optical film, the diffuser plate and the back plate are installed and fixed by the frame.
27. A light diffusing component, wherein the light diffusing component is a cover made of a transparent material, the cover has a cavity, and the cavity has an opening; the inner wall of the cover faces the direction of the opening The middle part of the hood is provided with a protruding part, the protruding part constitutes the light-receiving part of the cover body, the inner wall of the cover body is provided with a ring-shaped part, the ring-shaped part constitutes the light mixing part of the cover body The light receiving portion protrudes toward the direction of the opening; a first light guiding surface is formed on the outer edge of the light receiving portion, a second light guiding surface is formed on the surface of the light mixing portion, and the first light guiding surface is formed on the surface of the light mixing portion. A light mixing cavity is formed between the light surface and the second light guide surface, and a first groove is provided at the top of the protruding portion.

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