Display device with gray scale processing circuit to process lower gray scale level

摘要

A display device includes a gray scale controller which adjusts the number of pieces of image data successively displayed at the same brightness level to a predefined value or less when a desired brightness level represented by input image data is equal to or less than a predetermined level. Alternatively the display device may include a gray scale controller which may make the frequencies of selection of an immediately lower display brightness level than a desired level and an immediately higher display brightness level closer to each other when the brightness level represented by the input image data is equal to or less than the predetermined level and other than a plurality of display brightness levels. This frequency control is done to prevent a selected display brightness level from continuing at the same level over a period greater than a predetermined cycle.

主权项

1. A display device comprising:
a gray scale processor which successively displays two or more pieces of image data having different brightness levels in a predetermined order on a display panel during a predetermined period, thereby displaying in a pseudo manner a brightness corresponding to a desired brightness level represented by input image data; a detector for detecting whether the desired brightness level is equal to or less than a predetermined level; and a gray scale controller for adjusting the number of successively displayed pieces of image data of the same brightness level to or less than a pre-defined value when the desired brightness level is equal to or less than the predetermined level, wherein the input image data is displayed in a pseudo manner using first image data of a first display brightness level lower in brightness than the desired brightness level and second image data of a second display brightness level higher in brightness than the desired brightness level, and when the brightness level of the input image data is equal to or less than the predetermined level, the gray scale controller displays the first image data and the second image data alternately on the display panel for the predetermined period.