Display device and luminance control method therefor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMitsuhiro Kasahara, Yuichi Ishikawa, Tomoko Morita
Life of this patent
Estimating the term…
Abstract
A temperature difference estimated value is found from a video signal using a temperature estimated value representing the temperature of the panel outer periphery of a display screen of a PDP and a reference value representing the temperature of the panel outer periphery of the PDP which is outputted from a panel periphery temperature setter by a temperature difference estimator, and the luminance of an image displayed on a display is controlled depending on the temperature difference estimated value by a controller and a brightness controller.
Claims8
A display device, comprising:
- a display having a display screen that displays an image with a luminance corresponding to a video signal and an outer peripheral portion adjacent to said display screen;
- a temperature estimation device that provides a temperature estimation value, corresponding to a temperature of said display screen, based upon said video signal;
- an operation device that determines a temperature difference estimation value using a reference value corresponding to the temperature of said outer peripheral portion and said temperature estimation value;
- and
- a control device that controls said luminance on said display screen so as to lower a maximum luminance of said image as said temperature difference estimation value increases.
A method for controlling a luminance of a display device, the display device having a display screen that displays an image with a luminance corresponding to a video signal, and an outer peripheral portion adjacent to said display screen, the method comprising:
- obtaining a temperature estimation value, that corresponds to a temperature of the display screen, from the video signal;
- finding a temperature difference estimation value using a reference value, that corresponds to a temperature of the outer peripheral portion, and the temperature estimation value;
- and
- lowering a maximum luminance of the image as the temperature difference estimation value increases.
Dependencies are inferred from the claim text.