Display panel and transparent display

Abstract

This invention provides a display panel comprising a circuit board, a light-emitting element, an optical angle selection layer, a light-transmitting cover, and an anti-reflective layer stacked sequentially. The optical angle selection layer has a first side facing the light-emitting element, and its transmittance for visible light incident from the first side at an angle of incidence less than or equal to 35 degrees is greater than or equal to 86.7%. The anti-reflective layer has a transmittance for visible light incident from the side facing the light-transmitting cover at an angle of incidence less than or equal to 35 degrees is greater than or equal to 97%. This invention also provides a transparent display comprising the circuit board, light-emitting element, optical angle selection layer, light-transmitting cover, and anti-reflective layer as described above, wherein the circuit board is light-transmitting.

Claims

1. A display panel, comprising: A circuit board; At least one light-emitting element is disposed on the circuit board; An optical angle selective layer is disposed on the side of the light-emitting element away from the circuit board and has a first surface facing the light-emitting element, and the optical angle selective layer has a transmittance of greater than or equal to 86.7% for visible light incident from the first surface at an incident angle of less than or equal to 35 degrees; a light-transmitting cover plate is disposed on the side of the optical angle selective layer away from the light-emitting element; and an anti-reflective layer is disposed on the side of the light-transmitting cover plate away from the optical angle selective layer, and the anti-reflective layer has a transmittance of greater than or equal to 97% for visible light incident from the side facing the light-transmitting cover plate at an incident angle of less than or equal to 35 degrees.

2. The display panel of claim 1, wherein the optical angle selection layer has a reflectivity of 41% or greater for visible light incident at an angle of incidence greater than 43 degrees from the first surface.

3. The display panel of claim 1, wherein the optical angle selection layer comprises an overlapping plurality of first material layers and a plurality of second material layers, the refractive index of the first material layers being greater than the refractive index of the second material layers, and the first surface being connected to one of the first material layers.

4. The display panel of claim 3, wherein the light-transmitting cover is connected to another of the first material layers, and the refractive index of the first material layers is greater than the refractive index of the light-transmitting cover.

5. The display panel as requested in item 4, wherein the refractive index of the first material layers is greater than or equal to 1.6 and less than or equal to 2.5, and the refractive index of the second material layers is greater than or equal to 1.3 and less than or equal to 1.

7.

6. The display panel of claim 4, wherein the combination of the first material layers and the second material layers may be selected from the following group: titanium dioxide (TiO2) and silicon dioxide (SiO2); polyimide (PI) and amorphous fluoropolymer (Teflon AF); and poly(methyl methacrylate) (PMMA) and zinc sulfide (ZnS).

7. The display panel of claim 1, wherein the antireflective layer comprises an overlapping plurality of third material layers and a plurality of fourth material layers, the refractive index of the third material layers being greater than the refractive index of the fourth material layers, and the light-transmitting cover plate being connected to one of the third material layers.

8. The display panel as requested in item 7, wherein the refractive index of the third material layers is greater than or equal to 1.6 and less than or equal to 2.5, and the refractive index of the fourth material layers is greater than or equal to 1.3 and less than or equal to 1.

7.

9. The display panel of claim 7, wherein the combination of the third material layer and the fourth material layer may be selected from the following group: titanium dioxide (TiO2) and silicon dioxide (SiO2); polyimide (PI) and amorphous fluoropolymer (Teflon AF); and tantalum pentoxide (Ta2O5) and magnesium fluoride (MgF2).

10. The display panel of claim 1 further includes a filler material that fills the space between the light-emitting element and the optical angle selection layer, and the filler material includes a light-transmitting material with a refractive index greater than or equal to 1.

11. The display panel of claim 1 further includes a sidewall disposed on the circuit board and located to the side of the light-emitting element, the sidewall at least partially reflecting light emitted by the light-emitting element or reflected by the optical angle selection layer or the circuit board.

12. The display panel of claim 11, wherein the reflectance of one side of the sidewall facing the light-emitting element is greater than or equal to 65% for visible light with wavelengths of 420 to 700 nanometers, as measured by the specular component excluded method.

13. The display panel of claim 11, wherein the reflectance of the sidewall facing the light-emitting element is greater than or equal to 85% for visible light with wavelengths of 420 to 700 nanometers, as measured by a specular component included method.

14. The display panel of claim 13, wherein the side and the circuit board have a bottom corner, the bottom corner being greater than or equal to 26 degrees.

15. The display panel of claim 11, wherein the sidewall and the circuit board together form at least one receiving space, and a plurality of the light-emitting elements are provided in each receiving space.

16. The display panel of claim 11, wherein the sidewall and the circuit board together form at least one receiving space, and each receiving space is provided with a single light-emitting element.

17. A transparent display, comprising: A circuit board having light-transmitting properties; at least one light-emitting element is disposed on the circuit board; An optical angle selective layer is disposed on the side of the light-emitting element away from the circuit board and has a first surface facing the light-emitting element, and the optical angle selective layer has a transmittance of greater than or equal to 86.7% for visible light incident from the first surface at an incident angle of less than or equal to 35 degrees; a light-transmitting cover plate is disposed on the side of the optical angle selective layer away from the light-emitting element; and an anti-reflective layer is disposed on the side of the light-transmitting cover plate away from the optical angle selective layer, and the anti-reflective layer has a transmittance of greater than or equal to 97% for visible light incident from the side facing the light-transmitting cover plate at an incident angle of less than or equal to 35 degrees.

18. The transparent display of claim 17, wherein the optical angle selection layer has a reflectivity of 41% or greater for visible light incident at an angle of incidence greater than 43 degrees from the first surface.

19. The transparent display of claim 17, wherein the optical angle selection layer comprises an overlapping plurality of first material layers and a plurality of second material layers, the first surface being connected to one of the first material layers, the refractive index of the first material layers being greater than the refractive index of the second material layers, the refractive index of the first material layers being greater than or equal to 1.6 and less than or equal to 2.5, and the refractive index of the second material layers being greater than or equal to 1.3 and less than or equal to 1.

7.

20. The transparent display of claim 17 further includes a sidewall disposed on the circuit board and forming at least one receiving space together with the circuit board, each receiving space having a single light-emitting element, and the sidewall at least partially reflecting light emitted by the light-emitting element or reflected by the optical angle selection layer or the circuit board.

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