CN213070459U

CN213070459U - LED screen pixel structure, LED display module and LED display screen

Info

Publication number: CN213070459U
Application number: CN202022179818.8U
Authority: CN
Inventors: 周永业; 李艳龙
Original assignee: Shenzhen Timewaying Technology Co ltd
Current assignee: Shenzhen Timewaying Technology Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-04-27
Anticipated expiration: 2030-09-28

Abstract

The embodiment of the utility model provides a be applicable to LED and show technical field, provide a LED screen pixel structure, LED screen pixel structure includes LED pixel unit and sets up the diffusion layer of LED pixel unit top, the diffusion layer includes the orientation LED pixel unit's interior optical surface and with the outer optical surface that interior optical surface is relative, the light that LED pixel unit sent passes in proper order interior optical surface with outer optical surface, outer optical surface is flat just outer optical surface is formed with the fresnel lens structure, interior optical surface is the rough surface structure of non-smoothness, the diffusion layer is made by transparent optical material. The utility model discloses in can solve the diffusion layer reflection of light of current LED display screen strong and can not set up 3D polarizing film to and the lower problem of transmissivity of light.

Description

LED screen pixel structure, LED display module and LED display screen

Technical Field

The utility model belongs to the technical field of the LED shows, especially, relate to a LED screen pixel structure, LED display module assembly and LED display screen.

Background

The LED display screen has the advantages of high brightness, long service life, good performance stability and the like, is mainly used for outdoor advertising at first, and in recent years, along with the technical progress, the smaller the pixel size of the LED display screen is, the more gradually the LED display screen is put into indoor display application, and the LED display screen can be used at a closer viewing distance. In order to avoid the screen effect caused by too short viewing distance, light emitted by the LED pixel unit needs to be diffused to achieve the effect of increasing the pixel fullness, so a diffusion layer is often needed. However, the LED display screen in the existing pixel point diffusion technology has the problems of uneven brightness and poor picture display effect. In addition, in chinese utility model patent cn201820619431.x filed by beijing huayu bobockiki technology limited, a lampshade unit is provided corresponding to a single LED light emitting body, the lampshade unit includes a scattering portion located above the LED light emitting body and an arched shape in which the outer surface of the scattering portion is arched away from the LED light emitting body, however, the arched outer surface of the scattering portion easily forms strong reflection light, and a 3D polarizing film cannot be provided on the arched outer surface of the scattering portion to influence the 3D effect of the LED display screen. On the other hand, light absorbing materials are usually added in the diffusion layer to reduce the reflection of light, but this reduces the transmittance of light and wastes light energy.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve provides a LED screen pixel structure, LED display module assembly and LED display screen, aims at solving the diffusion layer reflection of light of current LED display screen strong and can not set up 3D polarizing film to and the lower problem of transmissivity of light.

The embodiment of the utility model provides a realize like this, a LED screen pixel structure, LED screen pixel structure includes LED pixel element and sets up the diffusion barrier of LED pixel element top, the diffusion barrier includes the orientation LED pixel element's interior optical surface and with the outer optical surface that interior optical surface is relative, the light that LED pixel element sent passes in proper order interior optical surface with outer optical surface, outer optical surface is flat just outer optical surface is formed with the fresnel lens structure, interior optical surface is the rough surface structure of non-smoothness, the diffusion barrier is made by transparent optical material.

Further, the thickness of the diffusion layer is 0.5 mm-10 mm.

Furthermore, a plurality of concave structures which are arranged at intervals are arranged on the inner optical surface; or a plurality of projections arranged at intervals are arranged on the inner optical surface.

Further, the size of the concave structures or the protrusions is 5-200 μm.

Furthermore, the LED screen pixel structure further comprises a first quarter-wave plate and a linear polarizer which are sequentially stacked on the diffusion layer.

Furthermore, the LED panel pixel structure further comprises a second quarter wave plate which is overlapped on one side of the linear polarizer, which is far away from the first quarter wave plate, and light rays emitted by the LED pixel unit sequentially pass through the first quarter wave plate, the linear polarizer and the second quarter wave plate.

Further, the second quarter-wave plate includes a first polarization region and a second polarization region, the LED pixel unit includes a first LED pixel unit and a second LED pixel unit, the first polarization region and the second polarization region correspond to the first LED pixel unit and the second LED pixel unit, respectively, and polarization states of the first polarization region and the second polarization region are orthogonal.

Further, the first polarization region and the second polarization region are distributed in an array.

Further, the LED screen pixel structure further comprises a retaining wall, wherein the retaining wall is arranged between the two adjacent first LED pixel units, between the two adjacent second LED pixel units and between the first LED pixel units and the second LED pixel units.

The embodiment of the utility model provides a still provide a LED display module assembly, LED display module assembly includes as above LED screen pixel structure.

The embodiment of the utility model provides a still provide a LED display screen, the LED display screen includes as above LED display module assembly.

Compared with the prior art, the embodiment of the utility model, beneficial effect lies in: the utility model discloses an outer optical surface of diffusion layer is flat, consequently can set up 3D polarizing film on outer optical surface, and flat surface structure still can reduce outer optical surface and be in the face of external light's reflection. Moreover, the diffusion layer made of transparent optical materials can improve the light transmittance and avoid light energy waste, and the outer optical surface of the diffusion layer is provided with a Fresnel lens structure and is combined with a non-smooth rough surface structure of the inner optical surface, so that the light diffusion effect can be enhanced, and the plumpness of the LED pixel luminous points is improved.

Drawings

Fig. 1 is a schematic structural diagram of a pixel structure of an LED panel according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a pixel structure of an LED panel according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a pixel structure of an LED panel according to another embodiment of the present invention;

fig. 4 is a partial structural schematic view of the planar arrangement of the first retardation region and the second retardation region in fig. 3.

In the drawings, each reference numeral denotes:

1. an LED pixel unit; 2. a diffusion layer; 21. an inner optical surface; 22. an outer optical surface; 221. a Fresnel lens structure; 3. a first quarter wave plate; 4. a linear polarizer; 5. a second quarter wave plate; 51. a first polarization region; 52. a second polarization region; 11. a first LED pixel unit; 12. a second LED pixel unit; 6. and (7) retaining walls.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, it is a LED screen pixel structure provided by the embodiment of the present invention, the LED screen pixel structure includes an LED pixel unit 1 and a diffusion layer 2 disposed above the LED pixel unit 1, the diffusion layer 2 includes an inner optical surface 21 facing the LED pixel unit 1 and an outer optical surface 22 opposite to the inner optical surface 21, light emitted from the LED pixel unit 1 sequentially passes through the inner optical surface 21 and the outer optical surface 22, the outer optical surface 22 is flat in surface and the outer optical surface 22 is formed with a fresnel lens structure 221, that is, a plurality of concentric circular saw tooth type grooves arranged from small to large according to size are formed, the inner optical surface 21 is a non-smooth rough surface structure, and the diffusion layer 2 is made of a transparent optical material.

The utility model discloses an outer optical surface 22 surface of diffusion layer 2 is flat, consequently can set up 3D polarizing film on outer optical surface 22, and flat surface structure still can reduce the reflection of outer optical surface 22 to external light. Moreover, the diffusion layer 2 made of transparent optical material can improve the transmittance of light and avoid wasting light energy, and the outer optical surface 22 of the diffusion layer 2 is formed with the fresnel lens structure 221 and combined with the non-smooth rough surface structure of the inner optical surface 21, so that the diffusion effect of light rays can be enhanced and the saturation of the light-emitting point of the LED pixel can be improved.

In this embodiment, the thickness of the diffusion layer 2 is 0.5mm to 10mm, and the thickness enables light to be fully diffused in the diffusion layer 2, thereby further enhancing the light diffusion effect. Optionally, the material of the diffusion layer 2 may be optical glass, PMMA (polymethyl methacrylate), PC (Polycarbonate), or the like, and the material of the diffusion layer 2 is not limited in this embodiment as long as light transmission can be achieved.

While the inner optical surface 21 of the diffusion layer 2 is provided with a plurality of concave structures arranged at irregular intervals, so that the inner optical surface 21 forms a non-smooth rough surface structure, in other possible embodiments, a plurality of protrusions arranged at irregular intervals may be provided on the inner optical surface 21, and a rough effect can also be formed on the inner optical surface 21. In this embodiment, the size of the recess structure or protrusion is 5-200 μm.

As shown in fig. 2, the LED panel pixel structure of another embodiment of the present invention further includes a first quarter-wave plate 3 and a linear polarizer 4 sequentially stacked on the diffusion layer 2, the first quarter-wave plate 3 and the linear polarizer 4 form an internal circular polarizer structure, which can prevent the reflection of ambient incident light, and the principle thereof is: the main light reflection effect of the diffusion layer 2 is generated on the surface of the fresnel lens structure 221 of the external optical surface 22, and when ambient light is incident on the surface of the fresnel lens structure 221 through the circular polarizer structure formed by the linear polarizer 4 and the first quarter-wave plate 3, the circular polarization state of the reflected light becomes orthogonal to the polarization state of the circular polarizer structure through reflection, so that the reflected light is absorbed when passing through the circular polarizer structure formed by the linear polarizer 4 and the first quarter-wave plate 3, thereby further reducing reflection.

As shown in fig. 3 and fig. 4, the LED screen pixel structure provided by the embodiment of the present invention further includes a second quarter wave plate 5 stacked on the side of the linear polarizer 4 far from the first quarter wave plate 3, the light emitted from the LED pixel unit 1 is unified into the light capable of passing through the linear polarizer 4 through the first quarter wave plate 3, and the light passing through the linear polarizer 4 is converted into circularly polarized light after passing through the second quarter wave plate 5. The second quarter-wave plate 5 includes a first polarization region 51 and a second polarization region 52, the LED pixel unit 1 includes a first LED pixel unit 11 and a second LED pixel unit 12, the first polarization region 51 and the second polarization region 52 correspond to the first LED pixel unit 11 and the second LED pixel unit 12, respectively, and polarization states of the first polarization region 51 and the second polarization region 52 are orthogonal. The light emitted by the LED pixel unit 1 is converted into circularly polarized light after passing through the second quarter-wave plate 5, and the second quarter-wave plate 5 includes the first polarization region 51 and the second polarization region 52 with orthogonal polarization states, so that the polarization states of the light emitted by the first LED pixel unit 11 and the second LED pixel unit 12 and passing through the first polarization region 51 and the second polarization region 52 and then passing out are orthogonal, thereby achieving the 3D effect. In this embodiment, the light passing through the linear polarizer 4 passes through the first polarization region 51 and the second polarization region 52 to form left circularly polarized light and right circularly polarized light, respectively.

In this embodiment, the first polarization regions 51 and the second polarization regions 52 are distributed in an array. Preferably, as shown in fig. 4, the first polarization regions 51 and the second polarization regions 52 are alternately arranged in sequence in the row direction, and the first polarization regions 51 and the second polarization regions 52 are alternately arranged in sequence in the column direction. Of course, the first polarization regions 51 and the second polarization regions 52 are not limited to this arrangement, for example, the first polarization regions 51 may be arranged in series in the row direction, the second polarization regions 52 may be arranged in series in the row direction, and the first polarization regions 51 and the second polarization regions 52 may be arranged in turn and alternately in the column direction; for another example, the first polarization regions 51 may be sequentially arranged in the column direction, the second polarization regions 52 may be sequentially arranged in the column direction, and the first polarization regions 51 and the second polarization regions 52 may be sequentially and alternately arranged in the row direction. In addition, the second quarter-wave plate 5 is produced through a photo-alignment process, thereby forming the first and

second polarization regions

51 and 52 having orthogonal polarization states.

In addition, in this embodiment, the LED panel pixel structure further includes a retaining wall 6, and the retaining wall 6 is disposed between two adjacent first LED pixel units 11, between two adjacent second LED pixel units 12, and between the adjacent first LED pixel unit 11 and the adjacent second LED pixel unit 12, so as to reduce optical crosstalk between pixel points. The retaining wall 6 may be an integrally formed structure, that is, the retaining wall 6 encloses to form a plurality of grids distributed in an array, and the first LED pixel unit 11 and the second LED pixel unit 12 are accommodated in the grids. In other possible embodiments, the retaining walls 6 may also be a split-molding structure, that is, each retaining wall 6 is a square ring structure that accommodates an independent one of the first LED pixel units 11 or the second LED pixel units 12.

The embodiment of the utility model provides a still provide a LED display module assembly, this LED display module assembly includes the LED screen pixel structure among the above-mentioned technical scheme.

The embodiment of the utility model provides a still provide a LED display screen, this LED display screen includes the LED display module assembly among the above-mentioned technical scheme.

To sum up, the utility model discloses an outer optical surface 22 surface of diffusion layer 2 is flat, consequently can set up 3D polarizing film on outer optical surface 22, and flat surface structure still can reduce the reflection of outer optical surface 22 to external light. Moreover, the diffusion layer 2 made of transparent optical material can improve the transmittance of light and avoid wasting light energy, and the outer optical surface 22 of the diffusion layer 2 is formed with the fresnel lens structure 221 and combined with the non-smooth rough surface structure of the inner optical surface 21, so that the diffusion effect of light rays can be enhanced and the saturation of the light-emitting point of the LED pixel can be improved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An LED screen pixel structure is characterized in that the LED screen pixel structure comprises an LED pixel unit (1) and a diffusion layer (2) arranged above the LED pixel unit (1), the diffusion layer (2) comprises an inner optical surface (21) facing the LED pixel unit (1) and an outer optical surface (22) opposite to the inner optical surface (21), light emitted by the LED pixel unit (1) sequentially passes through the inner optical surface (21) and the outer optical surface (22), the surface of the outer optical surface (22) is flat, a Fresnel lens structure (221) is formed on the outer optical surface (22), the inner optical surface (21) is a non-smooth rough surface structure, and the diffusion layer (2) is made of a transparent optical material.

2. An LED panel pixel structure according to claim 1, characterized in that the thickness of the diffusion layer (2) is 0.5mm to 10 mm.

3. An LED panel pixel structure according to claim 1, wherein a plurality of concave structures are arranged at intervals on the inner optical surface (21); or a plurality of projections arranged at intervals are arranged on the inner optical surface (21).

4. The LED panel pixel structure of claim 3, wherein the size of the concave structure or the convex structure is 5-200 μm.

5. An LED panel pixel structure according to claim 1, further comprising a first quarter wave plate (3) and a linear polarizer (4) sequentially stacked on the diffusion layer (2).

6. The LED panel pixel structure of claim 5, further comprising a second quarter wave plate (5) stacked on the side of the linear polarizer (4) far from the first quarter wave plate (3), wherein the light emitted from the LED pixel unit (1) passes through the first quarter wave plate (3), the linear polarizer (4) and the second quarter wave plate (5) in sequence.

7. An LED panel pixel structure according to claim 6, wherein the second quarter-wave plate (5) comprises a first polarization region (51) and a second polarization region (52), the LED pixel unit (1) comprises a first LED pixel unit (11) and a second LED pixel unit (12), the first polarization region (51) and the second polarization region (52) correspond to the first LED pixel unit (11) and the second LED pixel unit (12), respectively, and the polarization states of the first polarization region (51) and the second polarization region (52) are orthogonal.

8. The LED panel pixel structure of claim 7, wherein the first polarization region (51) and the second polarization region (52) are distributed in an array.

9. The LED panel pixel structure according to claim 7, further comprising a retaining wall (6), wherein the retaining wall (6) is disposed between two adjacent first LED pixel units (11), between two adjacent second LED pixel units (12), and between the adjacent first LED pixel units (11) and the adjacent second LED pixel units (12).

10. An LED display module, characterized in that the LED display module comprises the LED screen pixel structure of any one of claims 1 to 9.

11. An LED display screen, characterized in that the LED display screen comprises the LED display module according to claim 10.