METHOD AND DEVICE FOR EXPANDING A DYNAMIC RANGE OF DISPLAY DEVICE

摘要

An apparatus generates pixel data in a display. RGB pixel data is received corresponding to a target pixel of an image. A local adaption level is determined for the RGB pixel data representing perceived brightness of the RGB pixel data. The local adaption level is modified to generate a modified local adaption level. A transfer curve is generated based on the modified local adaption level and the transfer curve is applied to the input RGB pixel data. A local dimming value is generated to drive a light source driver of the display based on RGB pixel data for each of the pixels in the local dimming block and RGBW pixel data for each of the pixels in the local dimming block.

主权项

1. A method for generating pixel data in a display, the method comprising:
receiving RGB pixel data corresponding to a target pixel of an image; determining a local adaption level for the RGB pixel data representing perceived brightness of the RGB pixel data; modifying the local adaption level to generate a modified local adaption level; generating a transfer curve mapping input values to output values, the transfer curve having a decreasing gradient for input values above the modified local adaption level and the transfer curve having an increasing gradient for input values below the modified local adaption level, and the transfer curve providing a 1:1 mapping at the modified local adaption level; applying the transfer curve to the input RGB pixel data to map the input RGB pixel data to output RGB pixel data; converting the output RGB pixel data to RGBW pixel data to drive the target pixel; and generating for a local dimming block that includes the target pixel and a plurality of neighboring pixels, a local dimming value to drive a light source driver of the display, the local dimming value generated based on RGB pixel data for each of the pixels in the local dimming block and RGBW pixel data for each of the pixels in the local dimming block.