Heuristic learning for setting automatic display brightness based on an ambient light sensor
First Claim
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1. A method for brightness control in information handling systems, the method comprising:
- receiving an ambient light sensor (ALS) output at an information handling system, wherein the ALS output is indicative of ambient light levels in proximity to the information handling system and wherein the ALS output is linearly scaled with respect to a display brightness of a display used with the information handling system;
modifying the display brightness based on a response curve stored for a user of the information handling system and the ALS output, the response curve for calibrating display brightness values positively versus the ALS output;
receiving user input to make a change in the display brightness, the change corresponding to a first brightness difference, wherein the ALS output does not change after the display brightness is modified based on the response curve and before the user input is received;
calculating a second brightness difference smaller than the first brightness difference and having the same sign as the first brightness difference, including applying a positive confidence factor F to the first brightness difference to calculate the second brightness difference, the positive confidence factor F selected to prevent any point in the response curve having a negative or zero slope;
modifying a display brightness value in the response curve corresponding to the ALS output by the second brightness difference to generate an updated response curve; and
storing the updated response curve for the user in place of the response curve.
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Abstract
A heuristic learning algorithm uses an ALS to determine display brightness settings based on a stored response curve for display brightness for a user. When the user overrides the response curve value for display brightness at a given ALS output, the display brightness setting based on the user input is used to modify the response curve for the ALS output to lesser extent than the user input. Over time the response curve will approach desired user settings for each value of the ALS output.
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17 Claims
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1. A method for brightness control in information handling systems, the method comprising:
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receiving an ambient light sensor (ALS) output at an information handling system, wherein the ALS output is indicative of ambient light levels in proximity to the information handling system and wherein the ALS output is linearly scaled with respect to a display brightness of a display used with the information handling system; modifying the display brightness based on a response curve stored for a user of the information handling system and the ALS output, the response curve for calibrating display brightness values positively versus the ALS output; receiving user input to make a change in the display brightness, the change corresponding to a first brightness difference, wherein the ALS output does not change after the display brightness is modified based on the response curve and before the user input is received; calculating a second brightness difference smaller than the first brightness difference and having the same sign as the first brightness difference, including applying a positive confidence factor F to the first brightness difference to calculate the second brightness difference, the positive confidence factor F selected to prevent any point in the response curve having a negative or zero slope; modifying a display brightness value in the response curve corresponding to the ALS output by the second brightness difference to generate an updated response curve; and storing the updated response curve for the user in place of the response curve. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer-readable memory medium storing instructions, that, when executed by a processor, cause the processor to:
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receive an ambient light sensor (ALS) output at an information handling system, wherein the ALS output is indicative of ambient light levels in proximity to the information handling system and wherein the ALS output is linearly scaled with respect to a display brightness of a display used with the information handling system; modify the display brightness based on a response curve stored for a user of the information handling system and the ALS output, the response curve for calibrating display brightness values positively versus the ALS output; receive user input to make a change in the display brightness, the change corresponding to a first brightness difference, wherein the ALS output does not change after the display brightness is modified based on the response curve and before the user input is received; calculate a second brightness difference smaller than the first brightness difference and having the same sign as the first brightness difference, including applying a positive confidence factor F to the first brightness difference to calculate the second brightness difference, the positive confidence factor F selected to prevent any point in the response curve having a negative or zero slope; modify a display brightness value in the response curve corresponding to the ALS output by the second brightness difference to generate an updated response curve; and store the updated response curve for the user in place of the response curve. - View Dependent Claims (8, 9, 10, 11)
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12. An information handling system, comprising:
a processor enabled to access memory media storing instructions executable by the processor to; receive an ambient light sensor (ALS) output at an information handling system, wherein the ALS output is indicative of ambient light levels in proximity to the information handling system and wherein the ALS output is linearly scaled with respect to a display brightness of a display used with the information handling system; modify the display brightness based on a response curve stored for a user of the information handling system and the ALS output, the response curve for calibrating display brightness values positively versus the ALS output; receive user input to make a change in the display brightness, the change corresponding to a first brightness difference, wherein the ALS output does not change after the display brightness is modified based on the response curve and before the user input is received; calculate a second brightness difference smaller than the first brightness difference and having the same sign as the first brightness difference, including applying a positive confidence factor F to the first brightness difference to calculate the second brightness difference, the positive confidence factor F selected to prevent any point in the response curve having a negative or zero slope; modify a display brightness value in the response curve corresponding to the ALS output by the second brightness difference to generate an updated response curve; and store the updated response curve for the user in place of the response curve. - View Dependent Claims (13, 14, 15, 16, 17)
Specification