Image display device having a plurality of image correction modes for a plurality of image areas and image display method

摘要

In an image display device which performs area-active drive, backlight sources are emitted with appropriate luminances while inhibiting increase in power consumption and inhibiting reduction of image quality. An emission luminance calculation section divides an input image into a plurality of areas, and obtains luminances upon emission (first emission luminances) of LEDs in the areas. A plurality of correction modes are prepared as methods for correcting the first emission luminances, and a correction mode that is applied to an emission luminance correction process (selected correction mode) is stored to a correction mode storage section. For any LED units whose flag data stored in a correction-enabled map has the value of 1, an emission luminance correction section corrects their first emission luminances to obtain second emission luminances in accordance with the selected correction mode, with reference to correction value data stored in correction value tables.

主权项

1. An image display device having a function of controlling a backlight luminance, comprising:
a display panel including a plurality of display elements; a backlight including a plurality of light sources; an emission luminance calculation section configured to divide an input image into a plurality of areas and obtaining luminances upon emission of light sources corresponding to each area as first emission luminances on the basis of a portion of the input image of a corresponding area; an emission luminance correction section configured to obtain second emission luminances by correcting the first emission luminances in accordance with a selected correction mode which is selected from among a plurality of correction modes; a display data calculation section configured to obtain display data for controlling light transmittances of the display elements, on the basis of the input image and the second emission luminances; a panel driver circuit configured to output signals for controlling the light transmittances of the display elements to the display panel, on the basis of the display data; and a backlight driver circuit configured to output signals for controlling luminances of the light sources to the backlight, on the basis of the second emission luminances.