Method and device for ambient light estimation
First Claim
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1. A method of forming at least one control parameter dependent on ambient light, the method comprising:
- acquiring light values from an ambient light sensor;
acquiring positional status values from a positional status sensor;
determining a variation of the light values over a time period;
determining a temporal covariance value between the light values and the positional status values over the time period;
applying a first temporal filtering of the light values to form a first control parameter for adjusting a display brightness of a display; and
applying a second temporal filtering of the light values to form a second control parameter for adjusting pixel values of the display, the first temporal filtering different from the second temporal filtering,wherein at least one of the first control parameter or the second control parameter are formed in dependence on the temporal covariance value.
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Abstract
A method of forming a control parameter dependent on ambient light. The method comprises the steps of acquiring light values from an ambient light sensor and acquiring positional status values from a positional status sensor. The control parameter depends on the light values and is filtered in dependence on the positional status values.
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Citations
25 Claims
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1. A method of forming at least one control parameter dependent on ambient light, the method comprising:
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acquiring light values from an ambient light sensor; acquiring positional status values from a positional status sensor; determining a variation of the light values over a time period; determining a temporal covariance value between the light values and the positional status values over the time period; applying a first temporal filtering of the light values to form a first control parameter for adjusting a display brightness of a display; and applying a second temporal filtering of the light values to form a second control parameter for adjusting pixel values of the display, the first temporal filtering different from the second temporal filtering, wherein at least one of the first control parameter or the second control parameter are formed in dependence on the temporal covariance value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for forming at least one control parameter dependent on ambient light, the system comprising:
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an ambient light sensor having an output to supply light values; a positional status sensor having an output to supply positional status values; and a combiner, wherein; the output of the ambient light sensor and the output of the positional status sensor are connected to inputs of the combiner, and the combiner is configured to; determine a variation of the light values over a time period; determine a temporal covariance value between the light values and the positional status values over the time period; provide a first value of a first control parameter obtained by applying a first temporal filtering to the light values, for adjusting a display brightness of a display; and provide a second value of a second control parameter obtained by applying a second temporal filtering to the light values, for adjusting pixel values of the display, the first temporal filtering different from the second temporal filtering, wherein at least one of the first control parameter or the second parameter are formed in dependence on the temporal covariance value. - View Dependent Claims (22, 23, 24)
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25. A non-transitory computer-readable storage medium comprising computer-executable instructions which, when executed by a processor, cause a computing device to form at least one control parameter dependent on ambient light by:
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acquiring light values from an ambient light sensor; acquiring positional status values from a positional status sensor; determining a variation of the light values over a time period; determining a temporal covariance value between the light values and the positional status values over the time period; applying a first temporal filtering of the light values to form a first control parameter for adjusting a display brightness of a display; and applying a second temporal filtering of the light values to form a second control parameter for adjusting pixel values of the display, the first temporal filtering different from the second temporal filtering, wherein at least one of the first control parameter or the second control parameter are formed in dependence on the temporal covariance value.
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Specification