Light source apparatus

• US 9,095,029 B2
• Filed: 04/16/2013
• Issued: 07/28/2015
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lee, Chun-Hsing, Chiang, Ya-Hui, Hu, Hung-Lieh, Hsieh, Chia-Fen, Lu, Chien-Chun
• Primary Examiner(s): LUU, AN T
• Application Number:
  US13/864,235
• Publication Number:
  US 20140184088A1
• Time in Patent Office: 833 Days
• Field of Search: 315152-153, 315/210, 315/294, 315297-298, 362230-231
• US Class Current: 1/1
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

A light source apparatus includes a light-emitting module and a control unit. The light-emitting module is for providing a light. The control unit switches the light emitted from the light-emitting module between a first light and a second light, wherein the circadian stimulus value (CS/P value) of the second light is less than CS/P value of the first light, and the color temperatures of the second light and the first light are substantially the same as each other.

Claims

1. A light source apparatus, comprising:

a light-emitting module, for providing 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 circadian stimulus value of the second light is less than a circadian stimulus value of the first light, and color temperatures of the second light and the first 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 circadian stimulus mode and a second circadian stimulus mode, the light-emitting module comprises a plurality of light-emitting units, when the control unit switches the light-emitting module to the first circadian stimulus mode, the control unit makes a first portion of the light-emitting units emit light and when the control unit switches the light-emitting module to the second circadian stimulus mode, the control unit makes a second portion of the light-emitting units emit 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 3, wherein the light-emitting module comprises at least one first light-emitting unit, at least one second light-emitting unit and at least one third 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 and the third light-emitting unit provides a third sub-light beam, the first portion at least comprises the first light-emitting unit and the second light-emitting unit, the second portion at least comprises the first light-emitting unit and the third light-emitting unit, when the control unit switches the light-emitting module to the first circadian stimulus mode, the light-emitting units emits the first sub-light beam and the second light-emitting unit emits the second sub-light beam, and when the control unit switches the light-emitting module to the second circadian stimulus mode, the first light-emitting unit emits the first sub-light beam and the third light-emitting unit emits the third sub-light beam, wherein the circadian stimulus value of the second sub-light beam is greater than the circadian stimulus value of the third sub-light beam.

5. The light source apparatus as claimed in claim 4, wherein at least one range of wave peaks of the first sub-light beam is greater than 420 nm but less than 480 nm, at least one range of wave peaks of the second sub-light beam is greater than 480 nm but less than 540 nm and at least one range of wave peaks of the third sub-light beam is greater than 540 nm.

6. The light source apparatus as claimed in claim 5, wherein the first portion further comprises the third light-emitting unit, and if the illumination modes is switched to the first circadian stimulus mode, the third light-emitting unit emits the third sub-light beam.

7. The light source apparatus as claimed in claim 6, wherein the second light-emitting unit is a first phosphor, the third light-emitting unit is a second phosphor, the second sub-light beam can be produced by the first phosphor stimulated by the first sub-light beam and the third sub-light beam can be produced by the second phosphor stimulated by the first sub-light beam.

8. The light source apparatus as claimed in claim 4, wherein the light-emitting module further comprises at least one fourth light-emitting unit, the fourth light-emitting unit provides a fourth sub-light beam, the first portion comprises the first light-emitting unit, the second light-emitting unit and the fourth light-emitting unit and the second portion comprises the first 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 circadian stimulus mode, the first light-emitting unit emits the first sub-light beam, the second light-emitting unit emits the second 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 circadian stimulus mode, the first light-emitting unit emits the first 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 circadian stimulus value of the first sub-light beam is greater than the circadian stimulus value of the second sub-light beam and the circadian stimulus value of the second sub-light beam is greater than the circadian stimulus value of the third sub-light beam.

9. The light source apparatus as claimed in claim 8, wherein at least one range of wave peaks of the first sub-light beam is greater than 420 nm but less than 480 nm, at least one range of wave peaks of the second sub-light beam is greater than 480 nm but less than 540 nm, at least one range of wave peaks of the third sub-light beam is greater than 540 nm but less than 590 nm and at least one range of wave peaks of the fourth sub-light beam is greater than 590 nm but less than 680 nm.

10. The light source apparatus as claimed in claim 9, wherein the second light-emitting unit is a first phosphor, the third light-emitting unit is a second phosphor, the second sub-light beam can be produced by the first phosphor stimulated by the first sub-light beam and the third sub-light beam can be produced by the second phosphor stimulated by the first sub-light beam.

11. The light source apparatus as claimed in claim 8, wherein the control unit makes the light emitted from the light-emitting module switched between the first light, the second light, a third light and a fourth light, wherein a circadian stimulus value of the fourth light is less than a circadian stimulus value of the third light, and color temperatures of the fourth light and the third light are substantially the same as each other and the color temperatures of the first light and the third light are substantially different from each other.

12. The light source apparatus as claimed in claim 11, wherein the illumination modes further comprise a third circadian stimulus mode and a fourth circadian stimulus mode, when the control unit switches the light-emitting module to the third circadian stimulus mode, the first light-emitting unit emits the first sub-light beam, the second light-emitting unit emits the second sub-light beam and the fourth light-emitting unit emits the fourth sub-light beam to provide the third light, and the intensity composition proportions of the first sub-light beam, the second sub-light beam and the fourth sub-light beam of the third light are different from the intensity composition proportions of the first sub-light beam, the second sub-light beam and the fourth sub-light beam of the first light;

when the control unit switches the light-emitting module to the fourth circadian stimulus mode, the first light-emitting unit emits the first 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 to provide the fourth light, and the intensity composition proportions of the first sub-light beam, the third sub-light beam and the fourth sub-light beam of the fourth light are different from the intensity composition proportions of the first sub-light beam, the third sub-light beam and the fourth sub-light beam of the second light, wherein the circadian stimulus value of the first sub-light beam is greater than the circadian stimulus value of the second sub-light beam and the circadian stimulus value of the second sub-light beam is greater than the circadian stimulus value of the third sub-light beam.

13. The light source apparatus as claimed in claim 12, wherein the circadian stimulus value of the first light is greater than the circadian stimulus value of the second light by over 5% of the circadian stimulus value of the second light, and the circadian stimulus value of the third light is greater than the circadian stimulus value of the fourth light by over 5% of the circadian stimulus value of the fourth light.

14. The light source apparatus as claimed in claim 11, wherein the control unit makes the light-emitting module respectively switched to the first circadian stimulus mode, the second circadian stimulus mode, the third circadian stimulus mode and the fourth circadian stimulus mode in a plurality of periods of a whole day.

15. The light source apparatus as claimed in claim 1, wherein the circadian stimulus value of the first light is greater than the circadian stimulus value of the second light by over 5% of the circadian stimulus value of the second light.

16. The light source apparatus as claimed in claim 1, wherein the control unit makes the light emitted from the light-emitting module switched between the first light and the second light in a plurality of periods of a whole day.

17. The light source apparatus as claimed in claim 1, wherein the light source apparatus further comprises a user interface, and the control unit decides the present illumination mode of the light source apparatus according to a signal corresponding to the operation of a user sent by the user interface.

18. The light source apparatus as claimed in claim 17, wherein the control unit makes the light-emitting module respectively switched to different illumination modes according to a time management data in a plurality of periods, wherein the time management data is related to biological clock.

19. The light source apparatus as claimed in claim 18, wherein the light source apparatus further comprises a data-writing system, the time management data is received by the control unit through the data-writing system and is stored in a storage unit, and the control unit controls the control unit itself by loading the time management data from the storage unit.

20. The light source apparatus as claimed in claim 19, further comprising a connection interface, wherein the connection interface transmits the time management data come from the data-writing system to the control unit, wherein the connection interface is cable connection interface or wireless connection interface.

21. A light source apparatus, comprising:

a light-emitting module, for providing 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 circadian stimulus value of the first light is greater than a circadian stimulus value of the second light by over 5% of the circadian stimulus value of the second light.

22. The light source apparatus as claimed in claim 21, wherein the control unit makes the light-emitting module switched between a plurality of illumination modes, the illumination modes comprise a first circadian stimulus mode and a second circadian stimulus mode, the light-emitting module comprises a plurality of light-emitting units, when the control unit switches the light-emitting module to the first circadian stimulus mode, the control unit makes a first portion of the light-emitting units emit light and when the control unit switches the light-emitting module to the second circadian stimulus mode, the control unit makes a second portion of the light-emitting units emit light, wherein the first portion and the second portion are partially the same as each other or totally different from each other.

23. The light source apparatus as claimed in claim 22, wherein the light-emitting units comprise electroluminescent light-emitting element, light-induced light-emitting element or a combination thereof.

24. The light source apparatus as claimed in claim 23, wherein the light-emitting module comprises at least one first light-emitting unit, at least one second light-emitting unit and at least one third 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 and the third light-emitting unit provides a third sub-light beam, the first portion comprises the first light-emitting unit and the second light-emitting unit, the second portion comprises the first light-emitting unit and the third light-emitting unit, when the control unit switches the light-emitting module to the first circadian stimulus mode, the light-emitting units emits the first sub-light beam and the second light-emitting unit emits the second sub-light beam, and when the control unit switches the light-emitting module to the second circadian stimulus mode, the first light-emitting unit emits the first sub-light beam and the third light-emitting unit emits the third sub-light beam, wherein the circadian stimulus value of the second sub-light beam is greater than the circadian stimulus value of the third sub-light beam.

25. The light source apparatus as claimed in claim 24, wherein at least one range of wave peaks of the first sub-light beam is greater than 420 nm but less than 480 nm, at least one range of wave peaks of the second sub-light beam is greater than 480 nm but less than 540 nm and at least one range of wave peaks of the third sub-light beam is greater than 540 nm.

26. The light source apparatus as claimed in claim 25, wherein the first portion further comprises the third light-emitting unit, and if the illumination modes is switched to the first circadian stimulus mode, the third light-emitting unit emits the third sub-light beam.

27. The light source apparatus as claimed in claim 26, wherein the second sub-light beam is produced by the second light-emitting unit stimulated by the first sub-light beam.

28. The light source apparatus as claimed in claim 24, wherein the light-emitting module further comprises at least one fourth light-emitting unit, the fourth light-emitting unit provides a fourth sub-light beam, the first portion comprises the first light-emitting unit, the second light-emitting unit and the fourth light-emitting unit and the second portion comprises the first 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 circadian stimulus mode, the first light-emitting unit emits the first sub-light beam, the second light-emitting unit emits the second 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 circadian stimulus mode, the first light-emitting unit emits the first 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 circadian stimulus value of the first sub-light beam is greater than the circadian stimulus value of the second sub-light beam and the circadian stimulus value of the second sub-light beam is greater than the circadian stimulus value of the third sub-light beam.

29. The light source apparatus as claimed in claim 28, wherein at least one range of wave peaks of the first sub-light beam is greater than 420 nm but less than 480 nm, at least one range of wave peaks of the second sub-light beam is greater than 480 nm but less than 540 nm, at least one range of wave peaks of the third sub-light beam is greater than 540 nm but less than 590 nm and at least one range of wave peaks of the fourth sub-light beam is greater than 590 nm but less than 680 nm.

30. The light source apparatus as claimed in claim 29, wherein the second sub-light beam is produced by the second light-emitting unit stimulated by the first sub-light beam and the third sub-light beam is produced by the third light-emitting unit stimulated by the first sub-light beam.

31. The light source apparatus as claimed in claim 28, wherein the control unit makes the light emitted from the light-emitting module switched between the first light, the second light, a third light and a fourth light, wherein a circadian stimulus value of the third light is greater than a circadian stimulus value of the fourth light by over 5% of the circadian stimulus value of the fourth light and the color temperatures of the first light and the third light are substantially different from each other.

32. The light source apparatus as claimed in claim 31, wherein the illumination modes further comprise a third circadian stimulus mode and a fourth circadian stimulus mode, when the control unit switches the light-emitting module to the third circadian stimulus mode, the first light-emitting unit emits the first sub-light beam, the second light-emitting unit emits the second sub-light beam and the fourth light-emitting unit emits the fourth sub-light beam to provide the third light, and the intensity composition proportions of the first sub-light beam, the second sub-light beam and the fourth sub-light beam of the third light are different from the intensity composition proportions of the first sub-light beam, the second sub-light beam and the fourth sub-light beam of the first light;

when the control unit switches the light-emitting module to the fourth circadian stimulus mode, the first light-emitting unit emits the first 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 to provide the fourth light, and the intensity composition proportions of the first sub-light beam, the third sub-light beam and the fourth sub-light beam of the fourth light are different from the intensity composition proportions of the first sub-light beam, the third sub-light beam and the fourth sub-light beam of the second light, wherein the circadian stimulus value of the first sub-light beam is greater than the circadian stimulus value of the second sub-light beam and the circadian stimulus value of the second sub-light beam is greater than the circadian stimulus value of the third sub-light beam.

33. The light source apparatus as claimed in claim 31, wherein the control unit makes the light-emitting module respectively switched to the first circadian stimulus mode, the second circadian stimulus mode, the third circadian stimulus mode and the fourth circadian stimulus mode in a plurality of periods of a whole day.

34. The light source apparatus as claimed in claim 21, wherein the control unit makes the light emitted from the light-emitting module switched between the first light and the second light in a plurality of periods of a whole day.

35. The light source apparatus as claimed in claim 21, wherein the light source apparatus further comprises a user interface, and the control unit decides the present illumination mode of the light source apparatus according to a signal corresponding to the operation of a user sent by the user interface.

36. An illumination device, comprising:

a first light source, for providing a first light with a first circadian stimulus value; and

a second light source, for providing a second light with a second circadian stimulus value,

wherein the first light and the second light have a substantially same color temperature, and the first circadian stimulus value is different from the second circadian stimulus value.

37. The illumination device as claimed in claim 36, wherein the first circadian stimulus value is greater than the second circadian stimulus value by over 5% of the second circadian stimulus value.

38. The illumination device as claimed in claim 36, further comprising:

at least one first light-emitting unit, having a first light-emitting with at least one wave peak between 420 nm and 480 nm;

at least one second light-emitting unit, having a second light-emitting with at least one wave peak between 480 nm and 540 nm; and

at least one third light-emitting unit, having a third light-emitting with at least one wave peak greater than 540 nm,

wherein at least the first light-emitting unit and the second light-emitting unit form the first light source, and at least the first light-emitting unit and the third light-emitting unit form the second light source.

39. The illumination device as claimed in claim 38, wherein the first light-emitting unit, the second light-emitting unit and the third light-emitting unit form the first light source.

40. The illumination device as claimed in claim 36, further comprising:

at least one first light-emitting unit, having a first light-emitting with at least one wave peak between 420 nm and 480 nm;

at least one second light-emitting unit, having a second light-emitting with at least one wave peak between 480 nm and 540 nm;

at least one third light-emitting unit, having a third light-emitting with at least one wave peak between 540 nm and 590 nm; and

at least one fourth light-emitting unit, having a fourth light-emitting with at least one wave peak greater than 590 nm,

wherein at least the first light-emitting unit, the second light-emitting unit and the fourth light-emitting unit form the first light source, and at least the first light-emitting unit, the third light-emitting unit and the fourth light-emitting unit form the second light source.

41. The illumination device as claimed in claim 36, further comprising:

a third light source, for providing a third light with a third circadian stimulus value; and

a fourth light source, for providing a fourth light with a fourth circadian stimulus value,

wherein the third light and the fourth light have a substantially same color temperature, and the first circadian stimulus value, the second circadian stimulus value, the third circadian stimulus value and the fourth circadian stimulus value are different from each other.

42. The illumination device as claimed in claim 41, further comprising:

at least one first light-emitting unit, having a first light-emitting at least one wave peak between 420 nm and 480 nm;

at least one second light-emitting unit, having a second light-emitting at least one wave peak between 480 nm and 540 nm;

at least one third light-emitting unit, having a third light-emitting at least one wave peak between 540 nm and 590 nm; and

at least one fourth light-emitting unit, having a fourth light-emitting at least one wave peak greater than 590 nm,

wherein at least the first light-emitting unit, the second light-emitting unit and the fourth light-emitting unit form the first light source, at least the first light-emitting unit, the third light-emitting unit and the fourth light-emitting unit form the second light source, at least the first light-emitting unit and the second light-emitting unit form the third light source and at least the first light-emitting unit and the third light-emitting unit form the fourth light source.

43. The illumination device as claimed in claim 42, further comprising a control unit, wherein the control unit controls the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the fourth light-emitting unit switched between the first light source, the second light source, the third light source and the fourth light source.