Image display device and driving method thereof

摘要

Disclosed is an image display device and its driving method, which facilitates to improve partial luminance in an image-display area by a local dimming method to partially control a backlight unit according to a display image, and simultaneously to reduce power consumption.

主权项

1. An image display device comprising:
a liquid crystal display panel with plural display blocks; a system main body for generating plural image data, generating plural block dimming data, which is applied block-by-block, by analyzing block image data supplied to the plural display blocks, and modulating the plural image data to include the plural block dimming data as the lowermost bit of the plural image data by replacing the lowermost bit of the plural image data with the block dimming data, to output plural modulated image data including the plural image data and the plural block dimming data; a timing controller for aligning the plural modulated image data supplied from the system main body to output plural aligned modulated image data, and generating plural block dimming signals based on the plural block dimming data included in the plural modulated image data; a data driving circuit part for generating a data voltage corresponding to the aligned modulated image data supplied from the timing controller, and supplying the data voltage to the liquid crystal display panel, according to data control signals supplied from the timing controller; a gate driving circuit part for generating a scan pulse according to gate control signals supplied from the timing controller, and supplying the scan pulse to the liquid crystal display panel; a backlight unit for emitting light to the plural display blocks; and a backlight driver for driving the backlight unit based on the plural block dimming signals.