Light source assembly, imaging device and imaging method

Patent metadata

Field	Value
Publication number	US-10120271-B2
Application number	US-201514844116-A
Country	US
Kind code	B2
Filing date	Sep 3, 2015
Priority date	Dec 31, 2014
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A light source assembly, an imaging device and an imaging method are provided. The light source assembly comprises a light source component emitting a first light beam; a fluorescent excitation device receiving the first light beam and exciting a second light beam; a coupling device receiving an incident light beam and coupling the incident light beam into a third light beam, wherein the incident light beam includes the second light beam or includes the second light beam and the first light beam. The imaging device comprises the above-mentioned light source assembly and a projection system receiving the third light beam. The imaging method comprises: generating a first light beam; exciting a second light beam by using the first light beam; coupling the second light beam into a third light beam or coupling the second light beam and the first light beam into a third light beam; and imaging with the third light beam. The light source assembly, imaging device and imaging method can represent more plentiful colors and have wider color gamut.

First claim

What is claimed is:

1. A light source assembly, comprising:
a light source component configured to emit a plurality of first light beams;
a plurality of fluorescent excitation devices configured to receive at least portion of the first light beams emitted by the light source component and excite a plurality of second light beams, respectively;
a coupling device configured to receive a plurality of incident light beams and couple the incident light beams into a third light beam,
wherein the incident light beams at least comprise light beams of red, green and blue colors, and the second light beams are at least portion of the light beams of red, green and blue colors.

2. The light source assembly of claim 1 , wherein the second light beams at least comprise any one color of red, green and blue.

3. The light source assembly of claim 2 , wherein the first light beams exclude any one color of red, green and blue, and the second light beams include red, green and blue colors.

4. The light source assembly of claim 2 , wherein the fluorescent excitation devices are configured to receive a portion of the first light beams, the incident light beams consist of the second light beams and other portion of the first light beams; the first light beams comprise any one or two colors of red, green and blue; the second light beams comprise any two or one color of red, green and blue but different from the first light beams.

5. The light source assembly of claim 2 , wherein the light source component comprises one light source; the light source assembly further comprises a light splitting system, wherein the light splitting system is configured to receive the first light beams emitted by the light source and transmit the first light beams to the fluorescent excitation device at different times, or the light splitting system is configured to receive the first light beams emitted by the light source and transmit the first light beams to the fluorescent excitation devices and the coupling device at different times.

6. The light source assembly of claim 5 , wherein the light splitting system comprises a reflector and a driving device driving the reflector, the driving device is configured to drive the reflector to rotate, and the rotatable reflector reflects the first light beams to the fluorescent excitation devices respectively at different times or reflects the first light beams to the fluorescent excitation devices and the coupling device respectively at different times.

7. The light source assembly of claim 3 , wherein the light source component comprises a plurality of light sources which emit the first light beams respectively; the fluorescent excitation devices are configured to receive the first light beams and excite the second light beams.

8. The light source assembly of claim 3 , wherein the light source component comprises a plurality of light sources; at least one of the plurality of light sources is configured to emit the at least portion of the first light beams to the fluorescent excitation devices which excite the second light beams, and other light sources emit other portion of the first light beams to the coupling device.

9. The light source assembly of claim 1 , further comprising a light shaping system, wherein each of the incident light beams enters the coupling device after passing through the light shaping system; the light shaping system comprises a lens group and a homogenizing optical device which are arranged in sequence along a propagating direction of light beam.

10. The light source assembly of claim 9 , further comprising a light intensity regulating device, wherein each of the incident light beams further passes through the light intensity regulating device after passing through the light shaping system and then enters the coupling device; the light intensity regulating device controls an intensity of the third light beam by regulating an intensity of each of the incident light beams.

11. The light source assembly of claim 1 , wherein the fluorescent excitation devices comprise fluorescent powders.

12. The light source assembly of claim 1 , wherein the fluorescent excitation devices comprises various types of fluorescent powders at least comprising the fluorescent powders which excite two types of second light beams of a same color having different wavelengths.

13. The light source assembly of claim 11 , wherein the fluorescent powders are quantum dot-fluorescent powders.

14. An imaging device, comprising a light source assembly of claim 1 and a projection system configured to receive the third light beam.

15. The imaging device of claim 14 , further comprising a controller connected to the light source component, wherein the controller is configured to control a time that the light source component emits the first light beams by controlling a switching state of the light source component, so as to control a number and a type of the second light beams excited by the florescent excitation devices.

16. The imaging device of claim 15 , further comprising a signal input unit, wherein the controller is connected to the signal input unit and is configured to analyze an image signal of the signal input unit and control the switching state of the light source component according to the image signal.

17. An imaging method, comprising:
generating a plurality of first light beams;
exciting a plurality of second light beams by using the first light beams, wherein the first light beams exclude light beams of any one color of red, green and blue, and the second light beams include light beams respectively having red, green and blue colors;
coupling the second light beams into a third light beam; and
imaging with the third light beam.

18. The imaging method of claim 17 ,
wherein exciting the second light beams by using the first light beams comprises:
guiding the first light beams to a fluorescent excitation device and exciting the second light beams by fluorescent excitation devices; wherein the second light beams of a same color having different wavelengths are excited by at least two of the fluorescent excitation devices different from each other.

19. The imaging method of claim 18 , wherein imaging with the third light beam comprises:
guiding the third light beam to a projection system so as to image by the projection system; the imaging method further comprises: analyzing an image signal of the projection system, and controlling a number and a type of the second light beams excited by the fluorescent excitation device by controlling a time that the light source component emits the first light beams according to the image signal.

20. An imaging method, comprising:
generating a plurality of first light beams;
exciting a plurality of second light beams by using a portion of the first light beams, wherein the first light beams comprise light beams of any one or two colors of red, green and blue, and the second light beams comprise light beams of any two or one color of red, green and blue different from that of the first light beams;
coupling the second light beams and other portion of the first light beams into a third light beam; and
imaging with the third light beam.

Assignees

• Boe Technology Group Co Ltd
• Hefei Xinsheng Optoelectronics Technology Co Ltd

Inventors

• Wang Huan
• Yang Yuting
• Shin Mookeun

Classifications

• H04N9/3164

  using multiple light sources · CPC title

• F21K2/00

  Non-electric light sources using luminescence (using excitation by radioactivity G21H3/02, H01J65/06, H01J65/08; using excitation by an external electromagnetic field or by external corpuscular radiation H01J65/04); Light sources using electrochemiluminescence · CPC title

• G03B21/204 Primary

  using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197) · CPC title

• G03B33/06

  by additive-colour projection apparatus · CPC title

• H04N9/3158

  for controlling the spectrum · CPC title