Methods and apparatus for providing luminance compensation
First Claim
1. A method, comprising an act of:
- A) generating at least two different colors or color temperatures of light, over a significant range of different saturations or different color temperatures, with an essentially constant perceived brightness.
2 Assignments
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Accused Products
Abstract
Methods and apparatus for generating two or more different colors or color temperatures of light over a significant range of different saturations or different color temperatures, in which luminance compensation is provided. In one example, generated light is compensated, at least in part, for the “Helmholtz-Kohlrausch” (HK) effect, which models the perception of different brightnesses for different colors or color temperatures, notwithstanding identical luminances. In another example, lighting apparatus including one or more LEDs to generate two or more different colors or color temperatures of light are configured to provide luminance compensation so as to mitigate, at least in part, the HK effect.
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Citations
22 Claims
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1. A method, comprising an act of:
A) generating at least two different colors or color temperatures of light, over a significant range of different saturations or different color temperatures, with an essentially constant perceived brightness. - View Dependent Claims (2, 3, 4)
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5. An apparatus, comprising:
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at least one LED configured to generate at least two different colors or color temperatures of light over a significant range of different saturations or different color temperatures; and
at least one controller to control the at least one LED so as to generate the at least two different colors or color temperatures of the light such that they are perceived with an essentially constant brightness. - View Dependent Claims (6, 7)
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8. A method, comprising acts of:
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A) mapping a lighting command to a reference frame in relation to which at least one model for the Helmholtz-Kohlrausch effect is defined, the lighting command specifying at least a color or a color temperature of light to be generated; and
B) applying a luminance compensation factor to the lighting command, based on the at least one model for the Helmholtz-Kohlrausch effect and the mapped lighting command, to provide an adjusted lighting command. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. An apparatus, comprising:
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at least one LED; and
at least one controller to control the at least one LED based at least in part on a lighting command that specifies at least first color or a first color temperature of light to be generated by the at least one LED, the at least one controller configured to map the lighting command to a reference frame in relation to which at least one model for the Helmholtz-Kohlrausch effect is defined, the at least one controller further configured to apply a luminance compensation factor to the lighting command, based on the at least one model for the Helmholtz-Kohlrausch effect and the mapped lighting command, to provide an adjusted lighting command. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification