Ambient light adaptive displays
First Claim
1. A method for displaying images with a display that emits display light having a color, comprising:
- with a light sensor, measuring a color of ambient light;
with display control circuitry, determining an adapted white point for the display based on the color of the ambient light and the color of the display light, wherein determining the adapted white point comprises applying a factor that weights the color of the display light relative to the color of the ambient light; and
adjusting input pixel values based on the adapted white point to obtain adapted input pixel values.
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Abstract
An electronic device may include a display having an array of display pixels and having display control circuitry that controls the operation of the display. The display control circuitry may adaptively adjust the display output based on ambient lighting conditions. For example, in cooler ambient lighting conditions such as those dominated by daylight, the display may display neutral colors using a relatively cool white. When the display is operated in warmer ambient lighting conditions such as those dominated by indoor light sources, the display may display neutral colors using a relatively warm white. Adapting to the ambient lighting conditions may ensure that the user does not perceive color shifts on the display as the user'"'"'s vision chromatically adapts to different ambient lighting conditions. Adaptively adjusting images in this way can also have beneficial effects on the human circadian rhythm by displaying warmer colors in the evening.
75 Citations
20 Claims
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1. A method for displaying images with a display that emits display light having a color, comprising:
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with a light sensor, measuring a color of ambient light; with display control circuitry, determining an adapted white point for the display based on the color of the ambient light and the color of the display light, wherein determining the adapted white point comprises applying a factor that weights the color of the display light relative to the color of the ambient light; and adjusting input pixel values based on the adapted white point to obtain adapted input pixel values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic device, comprising:
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at least one light sensor that measures a color of ambient light; a display operable in at least first, second, and third user-selectable modes, wherein the display emits display light having a color; and display control circuitry that determines a first white point for the display in the first mode, a second white point for the display in the second mode, and a third white point for the display in the third mode, wherein the first white point is determined based on the color of ambient light and is independent of the color of display light, the second white point is based on the color of ambient light and the color of display light, and the third white point is based on the color of display light and is independent of the color of ambient light. - View Dependent Claims (12, 13, 14, 15)
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16. A method for displaying images with a display that emits display light having a color, comprising:
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with display control circuitry, gathering ambient light information from a light sensor; and with the display control circuitry, determining a white point for the display based on the ambient light information, the color of the display light, and a factor, wherein determining the white point comprises applying the factor to a first value associated with the ambient light information and applying the factor to a second value associated with the color of the display light. - View Dependent Claims (17, 18, 19, 20)
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Specification