Display device and method for adjusting gray-level of image frame depending on environment illumination

A method for adjusting a gray-level of a image frame depending on environment illumination, for adjusting the gray-level of at least partial image frame in the image frame, wherein the partial image frame comprises a plurality of pixels, the method comprising the steps of:

• obtaining the environment illumination;
• designating a reference illumination range;
• determining whether the environment illumination is higher than or lower than the reference illumination range;
• and
• if the environment illumination is higher than the reference illumination range, raising gray-levels of at least partial pixels in the partial image frame according to the environment illumination, and displaying the adjusted image frame;
• if the environment illumination is lower than the reference illumination range, reducing the gray-levels of the at least partial pixels in the partial image frame according to the environment illumination, and displaying the adjusted image frame.

A display device for adjusting a gray-level of a image frame depending on environment illumination, comprising:

• a display-panel, for displaying an image frame with a plurality of pixels;
• a controller, for driving the display-panel to display the image frame;
• an operation interface, for sending a image frame brightening command or a image frame dimming command to the controller;
• and
• an adjusting module, for adjusting gray-levels of at least partial pixels in the image frame;
• wherein after receiving the image frame brightening command, the controller starts the adjusting module to reduce the gray-levels of partial or all pixels in the image frame, so as to generate the adjusted image frame, and the controller drives the display-panel according to the adjusted image frame to display the adjusted image frame;
• and
• wherein after receiving the image frame dimming command, the controller starts the adjusting module to raise the gray-levels of partial or all pixels in the image frame, so as to generate the adjusted image frame, and the controller drives the display-panel using the adjusted image frame to display the adjusted image frame.