# US 10,485,070 B2 · Light source apparatus and display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,485,070 B2 - Document ID: US10485070B2 - Status: Granted - Kind: B2 - Application number: 16/018,086 - Filed: 2018-06-26 - Published: 2018-11-01 - Granted: 2019-11-19 - Earliest claimed: 2012-12-28 - Assignees: Industrial Technology Research Institute - Applicants: Industrial Technology Research Institute - Inventors: Tzung-Te Chen; Chia-Fen Hsieh; Tung-Yun Liu; Shih-Yi Wen; Chien-Chun Lu; Hsin-Yun Tsai - Web page: https://patentgrep.com/patent/US10485070B2 ## CPC - H05B 45/20: Controlling the colour of the light - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## 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 ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 3) 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. ### Claim 5 (depends on 4) 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. ### Claim 6 (depends on 4) 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. ### Claim 7 (depends on 4) 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. ### Claim 8 (depends on 3) 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. ### Claim 9 (depends on 1) 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. ### Claim 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. ### Claim 11 (depends on 10) 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. ### Claim 12 (depends on 11) 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. ### Claim 13 (depends on 10) The light source apparatus according to claim 10, wherein the first sub-light and the second sub-light are white lights. ### Claim 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. ### Claim 15 (depends on 14) The light source apparatus according to claim 14, wherein each of the upper boundary and the lower boundary is a quadratic function. ### Claim 16 (depends on 14) 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.