Display device, light converting device and display system

• US 10,013,925 B2
• Filed: 06/22/2016
• Issued: 07/03/2018
• Est. Priority Date: 09/28/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Inventors: Gan, Quan, Guo, Lei, Wang, Yongcan, Yoon, Yong Jun
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): Chan, Wei
• Application Number:
  US15/189,701
• Publication Number:
  US 20170094757A1
• Time in Patent Office: 741 Days
• Field of Search: 348 58, 348E13075, 353 31, 353 84, 359 40, 359 51, 359 41, 345 5, 345 6, 345 7, 345 8, 345 9, 345 10, 345 11, 345 38, 345 39- 61, 345152-158
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2358/00 Arrangements for display data security
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336

Abstract

A display device, a light converting device and a display system are provided. The display device includes a light-emitting module configured to emit at least two non-visible lights, non-visible lights of different types having different wavelengths; and a control module configured to control the light-emitting module to alternately emit the at least two non-visible lights at a wavelength adjusted timing, and to send a synchronous signal to a light converting device, the synchronous signal being configured to reflect the wavelength adjusted timing.

Claims

1. An anti-peep display device, comprising:

a light-emitting module configured to emit at least two non-visible lights, non-visible lights of different types among which having different wavelengths; and

a first control module configured to control the light-emitting module to alternately emit the at least two non-visible lights at a wavelength adjusted timing, and to send a synchronous signal to a light converting device, wherein the light converting device comprises a second control module, the second control module comprising a first control unit with a first selecting sub-unit, a wavelength converting unit, and a second control unit with a second selecting sub-unit, the first selecting sub-unit and the second selecting sub-unit synchronously adjusting angles of mirrors in a first optical path and a second optical path, respectively, wherein the light-emitting module comprises;

a visible light source; and

a second wavelength converting unit configured to convert a visible light emitted from the visible light source into a non-visible light,

wherein the first control module is configured to control the second wavelength converting unit to alternately convert the visible light into at least two non-visible lights at a wavelength adjusted timing.

2. The display device according to claim 1, wherein the second wavelength converting unit is a nonlinear crystal or a semiconductor optical amplifier.

3. A light converting device, comprising:

a first receiving module configured to receive at least two non-visible lights emitted alternately by a display device;

a second receiving module configured to receive a synchronous signal sent by the display device, the synchronous signal including a wavelength adjusted timing and wavelength information; and

a control module comprising a first control unit, at least two wavelength converting units, each of which is configured to convert one non-visible light into a visible light, and a second control unit configured to synchronously convert, based on the synchronous signal, the at least two non-visible lights into visible lights at the wavelength adjusted timing and to output the visible lights,

wherein the first control unit includes a first selecting sub-unit, and the second control unit includes a second selecting sub-unit, the first selecting sub-unit and the second selecting sub-unit synchronously adjusting angles of mirrors in a first optical path and second optical path, respectively.

4. The device according to claim 3, wherein the first control unit further comprises a first optical path altering sub-unit, and is configured to transmit, based on the synchronous signal, a non-visible light received at the current time in the wavelength adjusted timing to a first wavelength converting unit by an input optical path corresponding to the non-visible light, non-visible lights of different types corresponding to different input optical paths.

5. The device according to claim 4, wherein the second control unit further comprises a second optical path altering sub-unit, and is configured to output, based on the synchronous signal, the visible light emitted from the wavelength converting unit by an output optical path corresponding to the visible light, visible lights obtained by converting non-visible lights of different types corresponding to different output optical paths.

6. The device according to claim 4, wherein the first selecting sub-unit is configured to transmit, based on the synchronous signal, a first non-visible light received at the current time in the wavelength adjusted timing to the first optical path altering sub-unit, the first optical path altering sub-unit being configured to receive the first non-visible light emitted from the first selecting sub-unit and to transmit the non-visible light to a wavelength converting unit.

7. The device according to claim 5, wherein each of the first optical path altering sub-unit and the second optical path altering sub-unit is a mirror.

8. The device according to claim 5, wherein

the second optical path altering sub-unit is configured to output a visible light emitted from the wavelength converting unit to a second selecting sub-unit;

and

the second selecting sub-unit is configured to output, based on the synchronous signal, a visible light emitted from the second optical path altering sub-unit.

9. The device according to claim 3, wherein the light converting device is a pair of glasses.

10. An anti-peep display system, comprising a display device and a light converting device;

wherein the display device includes a light-emitting module configured to emit at least two non-visible lights, non-visible lights of different types having different wavelengths, and a first control module configured to control the light-emitting module to alternately emit the at least two non-visible lights at a wavelength adjusted timing, and to send a synchronous signal to the light converting device; and

wherein the light converting device includes a first receiving module configured to receive at least two non-visible lights emitted alternately by a display device, a second receiving module configured to receive a synchronous signal sent by the display device, and a second control module comprising a first control unit, at least two wavelength converting units, each of which being configured to convert one non-visible light into a visible light, and a second control unit and being configured to synchronously convert, based on the synchronous signal, the at least two non-visible lights into visible lights at the wavelength adjusted timing, and to output the visible lights, wherein the first control unit includes a first selecting sub-unit, and the second control unit includes a second selecting sub-unit, the first selecting sub-unit and the second selecting sub-unit synchronously adjusting angles of mirrors in a first optical path and second optical path, respectively.

11. The display system according to claim 10, wherein the light-emitting module comprises at least two non-visible light sources, non-visible lights that can be emitted from the non-visible light sources of different types having different wavelengths, wherein the first control module is configured to control the at least two non-visible light sources to emit light alternately at a wavelength adjusted timing.

12. The display system according to claim 11, wherein the light-emitting module comprises a first non-visible light source and a second non-visible light source, wherein the first control module is configured to control the first non-visible light source and the second non-visible light source to emit two non-visible lights alternately at a wavelength adjusted timing.

13. The display system according to claim 10, wherein the light-emitting module comprises:

a visible light source; and

a second wavelength converting unit configured to convert a visible light emitted from the visible light source into a non-visible light,

wherein the first control module is configured to control the second wavelength converting unit to alternately convert the visible light into at least two non-visible lights at a wavelength adjusted timing.

14. The display system according to claim 10, wherein the first control unit is configured to transmit, based on the synchronous signal, a non-visible light received at the current time in the wavelength adjusted timing to a wavelength converting unit by an input optical path corresponding to the non-visible light, non-visible lights of different types corresponding to different input optical paths.

15. The display system according to claim 14, wherein the second control unit is configured to output, based on the synchronous signal, the visible light emitted from the wavelength converting unit by an output optical path corresponding to the visible light, visible lights that is obtained by converting non-visible lights of different types corresponding to different output optical paths.

16. The display system according to claim 10, wherein the first selecting sub-unit is configured to transmit, based on the synchronous signal, a first non-visible light received at the current time in the wavelength adjusted timing to the first optical path altering sub-unit, the first optical path altering sub-unit being configured to receive the first non-visible light emitted from the first selecting sub-unit and to transmit the first non-visible light to a wavelength converting unit;

the second optical path altering sub-unit is configured to output a visible light emitted from the wavelength converting unit to a second selecting sub-unit; and

the second selecting sub-unit is configured to output, based on the synchronous signal, a visible light emitted from the second optical path altering sub-unit.