Display device and method of controlling its brightness
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.
Claims9
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 estimates, from said video signal, a temperature value corresponding to a display screen temperature;
- an operation device that determines a temperature difference estimate value in accordance with a reference value corresponding to a temperature of said outer peripheral portion and said estimated temperature value;
- and
- a control device that lowers the luminance of the image as said temperature difference estimate value increases.
A method for controlling a luminance of a display, in which a display screen displays an image having a predetermined luminance corresponding to a video signal, an outer peripheral portion being adjacent to said display screen, the method comprising:
- estimating a temperature value corresponding to a temperature of the display screen from the video signal;
- estimating a temperature difference value using a reference value that corresponds to a temperature of the outer peripheral portion and the estimated temperature value;
- and
- lowering the luminance of the image as the estimated temperature difference value increases.
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 estimates, from said video signal, a temperature value corresponding to a display screen temperature;
- an operation device that determines a temperature difference estimate value in accordance with a reference value corresponding to a temperature of said outer peripheral portion and said estimated temperature value;
- and
- a control device that controls the luminance of the image based on the temperature difference estimation value.
Dependencies are inferred from the claim text.