Image brightness control system

摘要

A brightness control system enhances a displayed image. The system selectively alters the brightness of a portion of the image to improve the clarity, noticeability, and intelligibility of information provided on the display. When used with a vehicle navigation system, the brightness adjustment system may emphasize vehicle or destination location display, driving directions, route planning information, or other information provided to the driver.

主权项

1. A method for image brightness control, comprising:
receiving a video signal comprising pixel image data for display, where the video signal defines the brightness and color for each pixel in the image to display the image on a display; receiving a first brightness control signal synchronized with at least first horizontal, first vertical, and first pixel timing and/or first synchronization information in the video signal to specify a first selected pixel subset in the pixel image data; receiving a second brightness control signal synchronized with at least second horizontal, second vertical, and second pixel timing and/or second synchronization information in the video signal to specify a second selected pixel subset in the pixel image data; receiving a reference voltage, the reference voltage defining an overall range of brightness for display of the video signal; modulating the reference voltage to determine a first brightness adjustment responsive to the first brightness control signal, wherein the modulation to the reference voltage to determine the first brightness adjustment adjusts the reference voltage which leads to an overall shift of the video signal without modification of the video signal; modulating the reference voltage to determine a second brightness adjustment responsive to the second brightness control signal; and simultaneously enhancing brightness of the first selected pixel subset and the second selected pixel subset using the first brightness adjustment and the second brightness adjustment, respectively.