Multi-view display

Abstract

A multi-view display includes a display module, a circular polarization module, and a Panchara Tönnies-Berry phase grating. The display module provides initial display light with linear polarization. The circular polarization module modulates the initial display light from the display module into first and second circularly polarized light. The Panchara Tönnies-Berry phase grating is disposed in front of the circular polarization module and includes liquid crystal material. The alignment of the liquid crystal material varies periodically along the beam splitting direction to form multiple grating units. The Panchara Tönnies-Berry phase grating modulates the first and second circularly polarized light into first display light emitted in a first emission direction and second display light emitted in a second emission direction, respectively. The first and second emission directions diverge relative to each other in the beam splitting direction.

Claims

1. A multi-view display, comprising: Display module for providing initial display light with linear polarization; A circular polarization module is used to adjust the initial display light from the display module into first circularly polarized light and second circularly polarized light, wherein the circular polarization module has an alternately distributed first polarization region and second polarization region, the first circularly polarized light is provided by the first polarization region and the second circularly polarized light is provided by the second polarization region; And a Panchara Tönnies-Berry phase grating, disposed in front of the circular polarization module, and comprising liquid crystal material, wherein the alignment orientation of the liquid crystal material exhibits periodic changes along the beam splitting direction to form multiple grating units, wherein the Panchara Tönnies-Berry phase grating adjusts the first circularly polarized light and the second circularly polarized light to respectively form a first display light emitted in a first emission direction and a second display light emitted in a second emission direction, and the first emission direction and the second emission direction are diverging from each other in the beam splitting direction.

2. The multi-view display as claimed in claim 1, wherein the first polarization region and the second polarization region are alternately distributed along the beam splitting direction.

3. The multi-view display as claimed in claim 1, wherein the first polarization region and the second polarization region are respectively parallel to the beam splitting direction.

4. The multi-view display as claimed in claim 1, wherein the polarization direction of the linear polarization intersects the optical axis direction of the circular polarization module.

5. The multi-view display as claimed in claim 1, wherein the period width of the grating unit is greater than 1500 nanometers and less than 35000 nanometers.

6. The multi-view display as claimed in claim 1, wherein the period width of the grating unit falls within the wavelength range of the initial display light.

7. The multi-view display as claimed in claim 1, wherein the Panchalat Nam-Berry phase grating further includes a substrate and an alignment layer sandwiched between the substrate and the liquid crystal material, and the liquid crystal material is cured on the alignment layer.

8. The multi-view display as claimed in claim 1, wherein the circular polarization module includes a patterned half-wave plate disposed between the display module and the Panchara Tunneling-Berry phase grating, and a quarter-wave plate disposed between the patterned half-wave plate and the Panchara Tunneling-Berry phase grating.

9. The multi-view display as claimed in claim 8, wherein the patterned half-wave plate includes alternating first phase delay regions and second phase delay regions, the phase delay difference provided by the first phase delay regions and the second phase delay regions being λ / 2, where λ is the wavelength of the initial display light.

10. The multi-view display as claimed in claim 8, wherein the optical axis of the quarter-wave plate is parallel to the optical axis of the patterned half-wave plate.

11. The multi-view display as claimed in claim 1, wherein the display module includes a display panel and a front polarizer disposed between the display panel and the circular polarization module, and the front polarizer determines the linear polarization of the initial display light.

12. The multi-view display as claimed in claim 12, wherein the display module further includes a rear polarizer and a backlight unit, the display panel is disposed between the front polarizer and the rear polarizer, and the rear polarizer is disposed between the backlight unit and the display panel.

13. The multi-view display as claimed in claim 1, wherein the thickness DLC of the liquid crystal material conforms to the formula: (DLC) = , where λ is the wavelength of the incident light and is the birefringence of the liquid crystal material.

14. The multi-view display as claimed in claim 1, wherein the thickness of the liquid crystal material is 0.3 micrometers to 3 micrometers.

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