Display device

Patent metadata

Field	Value
Publication number	US-2021055556-A1
Application number	US-202016898447-A
Country	US
Kind code	A1
Filing date	Jun 11, 2020
Priority date	Aug 22, 2019
Publication date	Feb 25, 2021
Grant date	—

Abstract

A display device includes a display, an image beam shifter, and a light guiding component. The display generates an image beam. The image beam shifter receives the image beam and generates a projected image beam. The light guiding component receives the projected image beam to transport the projected image beam to different positions of a target zone in sequence. The image beam shifter projects the projected image beam to different positions of the light guiding component with time division.

First claim

What is claimed is:

1 . A display device, comprising:
a display, generating an image beam; an image beam shifter, receiving the image beam and generating a projected image beam; and a light guiding component, receiving the projected image beam to transport the projected image beam to different positions of a target zone in sequence, wherein the image beam shifter projects the projected image beams to different positions of the light guiding component with time division.

2 . The display device according to claim 1 , wherein the display respectively generates a first image beam and a second image beam in a first time interval and in a second time interval in sequence; the image beam shifter makes a first projected image beam be projected to a first position of the light guiding component and makes a second projected image beam be projected to a second position of the light guiding component; and the first position is different from the second position.

3 . The display device according to claim 2 , wherein the first projected image beam and the second projected image beam correspond to a first display picture and a second display picture respectively.

4 . The display device according to claim 2 , wherein the light guiding component transports the first projected image to a first partition of the target zone, the light guiding component transports the second projected image to a second partition of the target zone; and the first partition is different from the second partition.

5 . The display device according to claim 1 , wherein the image beam shifter comprises:
a phase retarder, receiving the image beam; a first electrically controlled polarization grating overlapped with the phase retarder, directly passing through the image beam in a first time interval according to a control signal, and deflecting the image beam at a first deflection angle in a second time interval to generate a deflected image beam; and a second electrically controlled polarization grating overlapped with the first electrically controlled polarization grating, directly passing through the image beam in the first time interval according to the control signal to generate a first projected image beam, and deflecting the image beam at a second deflection angle in the second time interval to generate a second projected image beam; wherein the first deflection angle and the second deflection angle are mutually opposite numbers.

6 . The display device according to claim 1 , wherein the image beam shifter comprises:
a phase regulator, receiving the image beam; a phase retarder overlapped with the phase regulator, transmitting the image beam; a first polarization grating, overlapped with the phase retarder, deflecting the image beam at a first deflection angle to generate a first deflected image beam in a first time interval, and deflecting the image beam at a second deflection angle to generate a second deflected image beam in a second time interval; and a second polarization grating overlapped with the first polarization grating, deflecting the first deflected image beam at a third deflection angle to generate a first projected image beam in the first time interval; and deflecting the second deflected image beam at a fourth deflection angle to generate a second projected image beam in the second time interval; wherein the first deflection angle and the third deflection angle are mutually opposite numbers, and the second deflection angle and the fourth deflection angle are mutually opposite numbers.

7 . A display device, comprising:
a display, generating an image beam; an image beam shifter, receiving the image beam and generating a first projected image beam and a second projected image beam; and a light guiding component, receiving the first projected image beam and the second projected image beam, and transporting the first projected image beam to a first target zone and transporting the second projected image beam to a second target zone; wherein the first target zone is different from the second target zone.

8 . The display device according to claim 7 , wherein the first projected image beam and the second projected image beam respectively correspond to a first display picture viewed by one eye of a user and a second display picture viewed by the other eye of a user.

9 . The display device according to claim 7 , wherein the image beam shifter comprises:
a micro-retarder, receiving the image beam, and enabling a first image beam and a second image beam in the image beam to be in different polarization states; a phase retarder overlapped with the micro-retarder, enabling the first image beam and the second image beam to be in different rotation directions; and a polarization grating overlapped with the phase retarder, configured to generate the first projected image beam and the second projected image beam.

10 . The display device according to claim 7 , wherein the image beam shifter comprises:
a phase regulator, receiving the image beam, and enabling a first image beam and a second image beam in the image beam to be in different polarization states; a phase retarder overlapped with the phase regulator, configured to enable the first image beam and the second image beam to be in different rotation directions; and a polarization grating overlapped with the phase retarder, configured to generate the first projected image beam and the second projected image beam.

11 . The display device according to claim 7 , wherein the first projected image beam is a light beam with a first deflection angle, the second projected image beam is a light beam with a second deflection angle; and the first deflection angle is different from the second deflection angle.

Assignees

• Htc Corp

Inventors

• Tsai Cheng-Hsiu
• Chang Wei-Jen
• Shih Bao-Jen
• Fan fu-cheng

Classifications

• G02B5/3083

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title

• G02B5/1842

  Gratings for image generation (G02B5/1847 takes precedence) · CPC title

• G02B2027/015

  involving arrangement aiming to get less bulky devices · CPC title

• G02B2027/0147

  comprising a device modifying the resolution of the displayed image · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title