Light source apparatus

• US 9,693,408 B2
• Filed: 06/23/2015
• Issued: 06/27/2017
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: LRU Technology Inc.
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lu, Chien-Chun, Fu, Han-Kuei, Chiang, Ya-Hui, Wen, Shih-Yi, Lee, Chun-Hsing, Hsieh, Chia-Fen
• Primary Examiner(s): LUU, AN T
• Application Number:
  US14/746,857
• Publication Number:
  US 20150327342A1
• Time in Patent Office: 735 Days
• Field of Search: 315152-153, 315210, 315294, 315297-298, 362230-231
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

A light source apparatus including a light-emitting module and a control unit is provided. The light-emitting module is configured to provide a light. The control unit makes the light emitted from the light-emitting module switched between a first light and a second light. A spectrum of the first light is different from a spectrum of the second light, and color temperatures of the first light and the second light are substantially the same as each other.

Claims

1. A light source apparatus, comprising:

a light-emitting module, configured to provide a light; and

a control unit, making the light emitted from the light-emitting module switched between a first light and a second light, wherein a spectrum of the first light is different from a spectrum of the second light, and color temperatures of the first light and the second light are substantially the same as each other.

2. The light source apparatus as claimed in claim 1, wherein the control unit makes the light-emitting module switched between a plurality of illumination modes, the illumination modes comprise a first illumination mode and a second illumination mode, the light-emitting module comprises a plurality of light-emitting units, when the control unit switches the light-emitting module to the first illumination mode, the control unit makes a first portion or all of the light-emitting units emit the first light and when the control unit switches the light-emitting module to the second illumination mode, the control unit makes a second portion of the light-emitting units emit the second light, wherein the first portion and the second portion are partially the same as each other or totally different from each other.

3. The light source apparatus as claimed in claim 2, wherein the light-emitting units comprise electroluminescent light-emitting element, light-induced light-emitting element or a combination thereof.

4. The light source apparatus as claimed in claim 2, wherein the light-emitting module comprises at least one first light-emitting unit, at least one second light-emitting unit, at least one third light-emitting unit, at least one fourth light-emitting unit, and at least one fifth light-emitting unit, the first light-emitting unit provides a first sub-light beam, the second light-emitting unit provides a second sub-light beam, the third light-emitting unit provides a third sub-light beam, the fourth light-emitting unit provides a fourth sub-light beam, the fifth light-emitting unit provides a fifth sub-light beam, the second portion at least comprises the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit, when the control unit switches the light-emitting module to the first illumination mode, the first light-emitting unit emits the first sub-light beam, the second light-emitting unit emits the second sub-light beam, the third light-emitting unit emits the third sub-light beam, the fourth light-emitting unit emits the fourth sub-light beam, and the fifth light-emitting unit emits the fifth sub-light beam, and when the control unit switches the light-emitting module to the second illumination mode, the first light-emitting unit emits the first sub-light beam, the second light-emitting unit emits the second sub-light beam, the third light-emitting unit emits the third sub-light beam, and the fourth light-emitting unit emits the fourth sub-light beam, wherein the fifth sub-light beam is an invisible light beam.

5. The light source apparatus as claimed in claim 4, wherein the first sub-light beam, the second sub-light beam, the third sub-light beam, and the fourth sub-light beam are visible light beams, and the fifth sub-light beam is an ultraviolet light beam.

6. The light source apparatus as claimed in claim 4, wherein the first sub-light beam, the second sub-light beam, the third sub-light beam, and the fourth sub-light beam are visible light beams, and the fifth sub-light beam is an infrared light beam.

7. The light source apparatus as claimed in claim 4, wherein the first light-emitting unit is a first light-emitting diode (LED), the second light-emitting unit is a first phosphor, the third light-emitting unit is a second phosphor, the fourth light-emitting unit is a third phosphor, the fifth light-emitting unit is a second LED, the second sub-light beam is produced by the first phosphor stimulated by the first sub-light beam, the third sub-light beam is produced by the second phosphor stimulated by the first sub-light beam, and the fourth sub-light beam is produced by the third phosphor stimulated by the first sub-light beam.

8. The light source apparatus as claimed in claim 2, wherein a general color rendering index (CRI) of the first light is greater than that of the second light.

9. The light source apparatus as claimed in claim 2, wherein light emitting efficiency of the second light is greater than that of the first light.

10. The light source apparatus as claimed in claim 2, wherein a CRI R14 of the first light is greater than that of the second light, and a CRI R13 of the second light is greater than that of the first light.

11. The light source apparatus as claimed in claim 2, wherein the light-emitting module comprises at least one first light-emitting unit, at least one second light-emitting unit, at least one third light-emitting unit, at least one fourth light-emitting unit, at least one fifth light-emitting unit, and at least one sixth light-emitting unit, the first light-emitting unit provides a first sub-light beam, the second light-emitting unit provides a second sub-light beam, the third light-emitting unit provides a third sub-light beam, the fourth light-emitting unit provides a fourth sub-light beam, the fifth light-emitting unit provides a fifth sub-light beam, the sixth light-emitting unit provides a sixth sub-light beam, the first portion at least comprises the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit, the second portion at least comprises the first light-emitting unit, the fifth light-emitting unit, and the sixth light-emitting unit, when the control unit switches the light-emitting module to the first illumination mode, the first light-emitting unit emits the first sub-light beam, the second light-emitting unit emits the second sub-light beam, the third light-emitting unit emits the third sub-light beam, and the fourth light-emitting unit emits the fourth sub-light beam, and when the control unit switches the light-emitting module to the second illumination mode, the first light-emitting unit emits the first sub-light beam, the fifth light-emitting unit emits the fifth sub-light beam, and the sixth light-emitting unit emits the sixth sub-light beam.

12. The light source apparatus as claimed in claim 11, wherein the first sub-light beam is a blue light beam, the second sub-light beam is a green light beam, the third sub-light beam is a yellow light beam, the fourth sub-light beam is a red light beam, the fifth sub-light beam is a red light beam, and the sixth sub-light beam is a lime color light beam.

13. The light source apparatus as claimed in claim 12, wherein a general CRI of the first light is greater than that of the second light.

14. The light source apparatus as claimed in claim 13, wherein the general CRI of the first light is greater than 90.

15. The light source apparatus as claimed in claim 13, wherein light emitting efficiency of the second light is greater than that of the first light.

16. The light source apparatus as claimed in claim 12, wherein a CRI R14 of the first light is greater than that of the second light, and a CRI R13 of the second light is greater than that of the first light.

17. The light source apparatus as claimed in claim 16, wherein the CRI R14 of the first light is greater than 90, and the CRI R13 of the second light is greater than 90.

18. The light source apparatus as claimed in claim 17, wherein both the general CRIs of the first light and the second light are greater than 84.

19. The light source apparatus as claimed in claim 11, wherein the first light-emitting unit is a first LED, the second light-emitting unit is a first phosphor, the third light-emitting unit is a second phosphor, the fourth light-emitting unit is a third phosphor, the fifth light-emitting unit is a second LED, and the sixth light-emitting unit is a fourth phosphor;

the first phosphor, the second phosphor, and the third phosphor are stimulated by a light emitted by a third LED to respectively emit the second sub-light beam, the third sub-light beam, and the fourth sub-light beam;

the fourth phosphor is stimulated by a light emitted by a fourth LED to emit the sixth sub-light beam.

20. The light source apparatus as claimed in claim 1, wherein one of the first light and the second light contains an invisible light.