Patent ID: 8654058
Filing Date: 2014-02-18
Classification: H04N

Abstract:
1. An apparatus for dynamically enhancing image contrast, comprising: a front-end processing circuit for receiving a plurality of image signals and selecting one of the plurality of image signals to generate an image data after processing, the image data comprising a brightness of an image; a light source comprising an eco mode, a normal mode, and a boost mode; an image data buffer for temporarily storing the image data; and a micro-processor presetting a black threshold and a white threshold, the micro-processor dynamically adjusting the light source to the eco mode by decreasing an illumination level of the light source as the micro-processor determines that the brightness of the image in the image data from the image data buffer is lower than the black threshold, and the micro-processor dynamically adjusting the light source to the boost mode by increasing the illumination level of the light source as the micro-processor determines the brightness of the image in the image data from the image data buffer is higher than the white threshold; wherein the micro-processor is configured to perform the steps of presetting the black threshold and the white threshold, dynamically adjusting the light source, and determining the brightness of the image, without intervention from a user; wherein the micro-processor adjusts the light source from one of the normal mode and the boost mode to the eco mode by N stages when the light source is in one of the normal mode and the boost mode, N is a positive integer greater than 1, and the brightness of the image is a mean brightness of the image.