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

• US 9,412,318 B2
• Filed: 01/02/2015
• Issued: 08/09/2016
• Est. Priority Date: 04/20/2011
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Chang, Yao-Tsung
• Primary Examiner(s): Pham, Long D
• Application Number:
  US14/588,691
• Publication Number:
  US 20150116377A1
• Time in Patent Office: 585 Days
• Field of Search: 345/102
• US Class Current: 1/1
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/34 by control of light from an independent source
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A display device for adjusting the gray level of an image frame depending on environment illumination is provided. The display device includes a display-panel, a controller, an optical interface, and an adjusting module. The display-panel displays the image frame with the plurality of pixels. The controller is used to drive the display-panel to display the image frame. The operation interface is used to send an image frame brightening command or an image frame dimming command to the controller. The adjusting module is used to adjust gray-levels of the pixels according to the environment illumination. When the environment illumination is too high, the adjusting module raises the gray-level of partial or all pixels; and when the environment illumination is too low, the adjusting module reduces the gray-level of partial or all pixels; so that visual effect of the display device is enhanced.

Claims

1. A display device for adjusting a gray-level of an 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 an image frame brightening command or an 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 an 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 an adjusted image frame, and the controller drives the display-panel using the adjusted image frame to display the adjusted image frame.

2. The display device as claimed in claim 1, wherein the operation interface is further provided for sending an inverse command, after receiving the inverse command, the controller starts the adjusting module to perform an image inverse process on the image frame, so as to generate an adjusted image frame;

and the controller drives the display-panel by the adjusted image frame to display the adjusted image frame.

3. The display device as claimed in claim 1, wherein the controller marks the partial image frame with the text data before the adjustment of the gray-level is performed on the image frame, and the adjusting module then performs the adjustment of the gray-level on the partial image frame.