Light source apparatus and display apparatus

• US 10,485,070 B2
• Filed: 06/26/2018
• Issued: 11/19/2019
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: LRU Technology Inc.
• Original Assignee: Industrial Technology Research Institute
• Inventors: Chen, Tzung-Te, Hsieh, Chia-Fen, Liu, Tung-Yun, Wen, Shih-Yi, Lu, Chien-Chun, Tsai, Hsin-Yun
• Primary Examiner(s): Tran, Anh Q
• Application Number:
  US16/018,086
• Publication Number:
  US 20180317296A1
• Time in Patent Office: 511 Days
• Field of Search: None
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

An embodiment of the disclosure provides a light source apparatus including a light-emitting module and a control unit. The light-emitting module is configured to provide a light. The control unit is configured to change proportion of a first sub-light and a second sub-light to form the light so that a circadian action factor (CAF) and a correlated color temperature (CCT) of the light varies along a CAF vs. CCT locus of the light different from a CAF vs. CCT locus of sunlight. A CAF vs. CCT coordinate of one of the first sub-light and the second sub-light is below the CAF vs. CCT locus of sunlight, and a CAF vs. CCT coordinate of the other one of the first sub-light and the second sub-light is above the CAF vs. CCT locus of sunlight. A display apparatus is also provided.

Claims

1. A light source apparatus, comprising:

a first light source, configured to provide a first light, wherein a circadian action factor (CAF) vs. correlated color temperature (CCT) coordinate (CCT, CAF) of the first light is within a first area formed by six CAF vs. CCT coordinates (2700±

100 K, 0.197), (2700±

100 K, 0.696), (4500±

200 K, 0.474), (4500±

200 K, 1.348), (6500±

300 K, 0.759), and (6500±

300 K, 1.604) as vertices.

2. The light source apparatus according to claim 1, wherein a color rendering index (CRI) of the first light is greater than 60, and a CAF vs. CCT coordinate (CCT, CAF) of the first light is within a second area formed by four CAF vs. CCT coordinates (2700±

100 K, 0.696), (2700±

100 K, 0.197), (6500±

300 K, 0.759), and (6500±

300 K, 1.229) as vertices.

3. The light source apparatus according to claim 1, further comprising:

a second light source, configured to provide a second light, wherein a CAF vs. CCT coordinate (CCT, CAF) of the second light is within the first area and different from that of the first light.

4. The light source apparatus according to claim 3, further comprising:

a control unit, configured to control the first light source and the second light source, so as to combine the first light and the second light to output a third light.

5. The light source apparatus according to claim 4, wherein a CAF vs. CCT coordinate (CCT, CAF) of the third light is below a CAF vs. CCT locus of sunlight.

6. The light source apparatus according to claim 4, wherein a CAF vs. CCT coordinate (CCT, CAF) of the third light is above a CAF vs. CCT locus of sunlight.

7. The light source apparatus according to claim 4, wherein a CAF vs. CCT coordinate (CCT, CAF) of the third light is on a CAF vs. CCT locus of sunlight.

8. The light source apparatus according to claim 3, wherein a CAF vs. CCT coordinate (CCT, CAF) of one of the first light and the second light is below a CAF vs. CCT locus of sunlight, and a CAF vs. CCT coordinate (CCT, CAF) of the other one of the first light and the second light is above the CAF vs. CCT locus of sunlight.

9. The light source apparatus according to claim 1, wherein a color rendering index (CRI) of the first light is greater than 80, and a CAF vs. CCT coordinate (CCT, CAF) of the first light is within a third area formed by six CAF vs. CCT coordinates (2700±

100 K, 0.242), (2700±

100 K, 0.534), (4500±

200 K, 0.580), (4500±

200 K, 0.841), (6500±

300 K, 0.788), and (6500±

300 K, 1.060) as vertices.

10. A light source apparatus, comprising:

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

a control unit, configured to change proportion of a first sub-light and a second sub-light to form the light so that a circadian action factor (CAF) and a correlated color temperature (CCT) of the light varies along a CAF vs. CCT locus of the light different from a CAF vs. CCT locus of sunlight, wherein a CAF vs. CCT coordinate of one of the first sub-light and the second sub-light is below the CAF vs. CCT locus of sunlight, and a CAF vs. CCT coordinate of the other one of the first sub-light and the second sub-light is above the CAF vs. CCT locus of sunlight.

11. The light source apparatus according to claim 10, wherein the control unit is configured to change proportion of the first sub-light, the second sub-light, a third sub-light, and a fourth sub-light to form the light so that a CAF vs. CCT coordinate of the light varies within an area having fourth vertices respectively located at CAF vs. CCT coordinates of the first sub-light, the second sub-light, the third sub-light, and the fourth sub-light.

12. The light source apparatus according to claim 11, wherein a CCT of the first sub-light is less than that of the second sub-light and less than that of the fourth sub-light, a CCT of the third sub-light is less than that of the second sub-light and less than that of the fourth sub-light, CAF vs. CCT coordinates of the first sub-light and the third sub-light are respectively at two opposite sides of the CAF vs. CCT locus of sunlight, and CAF vs. CCT coordinates of the second sub-light and the fourth sub-light are respectively at two opposite sides of the CAF vs. CCT locus of sunlight.

13. The light source apparatus according to claim 10, wherein the first sub-light and the second sub-light are white lights.

14. A light source apparatus, comprising:

a first light source, configured to provide a first light, wherein a circadian action factor (CAF) vs. correlated color temperature (CCT) coordinate (CCT, CAF) of the first light is within an area having an upper boundary, a lower boundary, and CAF vs. CCT coordinates between the upper boundary and the lower boundary, CAF vs. CCT coordinates (2700±

100 K, 0.696), (4500±

200 K, 1.348), and (6500±

300 K, 1.604) are on the upper boundary, and CAF vs. CCT coordinates (2700±

100 K, 0.197), (4500±

200 K, 0.474), and (6500±

300 K, 0.759) are on the lower boundary.

15. The light source apparatus according to claim 14, wherein each of the upper boundary and the lower boundary is a quadratic function.

16. The light source apparatus according to claim 14, further comprising:

a second light source, configured to provide a second light, wherein a CAF vs. CCT coordinate (CCT, CAF) of the second light is within the area and different from that of the first light.