Patent ID: 9583045
Date: 2017-02-28
CPC Classifications: G09G

Claim:
1. A display control circuit, applicable to a display panel, comprising: a threshold determining circuit, for determining a threshold by histogramming a plurality of values of a plurality of pixels of a to-be-displayed frame according to a reference value, wherein the reference value is a predetermined distortion proportion, the threshold is a specific pixel value, and the threshold is determined such that a proportion defined by a number of pixels between the threshold and the upper limit and a total pixel number is lower than the reference value; a pulse width modulation (PWM) control circuit, coupled to the threshold determining circuit, for generating a PWM signal for controlling a backlight luminance of the display panel according to the threshold; and a pixel value adjusting circuit, coupled to the threshold determining circuit, for adjusting a pixel value of each pixel of the plurality of pixels according to whether said pixel value is between the upper limit and the threshold or between a lower limit and said threshold; wherein the threshold is smaller than an upper limit of the pixel values, and the reference value is equal to: 1−P; and wherein P is said proportion defined by the number of pixel values between the threshold and the upper limit and the total pixel number.