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US RE39,741 E1Granted
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.
Claims14
A display device, comprising:
- a display having a display screen including a plurality of regions, that displays an image with a luminance related 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 temperature of said display screen;
- an operation device that determines a temperature difference estimation value in accordance with a reference value related to said temperature of said outer peripheral portion, and said temperature estimation value;
- and
- a control device that extracts a peripheral region, from among said plurality of regions, that is adjacent to said outer peripheral portion, said control device lowering a luminance level of said peripheral region as said temperature difference estimation value increases.
2 more elements
A display device, comprising:
- a display having a display screen including a plurality of regions that displays an image with a luminance related 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 temperature of said display screen;
- an operation device that determines a temperature difference estimation value in accordance with a reference value related to said temperature of said outer peripheral portion, and said temperature estimation value;
- and
- a control device that extracts a peripheral region, from among said plurality of regions, said control device setting a luminance level of said peripheral region to be lower than a luminance value of a block inside said display screen.
2 more elements
A display device, comprising:
- a display having a display screen including a plurality of regions that displays an image with a luminance related to a video signal, and an outer peripheral portion adjacent to said display screen;
- a region extraction device that extracts peripheral regions adjacent to said outer peripheral portion from said plurality of regions;
- a temperature estimation device that estimates a temperature value, from said video signal, said temperature estimation value being related to a temperature of said display screen for each of said peripheral regions;
- an operation device that determines a peripheral region temperature difference estimation value using a reference value that corresponds to a temperature of said outer peripheral portion and said temperature estimation value estimated for each of said peripheral regions;
- and
- a controller that controls a luminance level for each of said peripheral regions in accordance with said peripheral region temperature difference estimation value.
3 more elements
A display device, comprising:
- a display having a display screen including a plurality of regions that displays an image with a luminance related to a video signal, and an outer peripheral portion adjacent to said display screen;
- a region extraction device that extracts peripheral regions adjacent to said outer peripheral portion from said plurality of regions;
- a temperature estimation device that estimates a temperature value, from said video signal, said temperature estimation value being related to a temperature of said display screen for each of said peripheral regions;
- an operation device that determines a peripheral region temperature difference estimation value for each of said peripheral regions from said estimated temperature value estimated for each of said peripheral regions, said operation device using a reference value that corresponds to a temperature of said outer peripheral portion and said temperature estimation value estimated for each of said peripheral regions, said operation device using a maximum peripheral region temperature difference estimation value to determine said peripheral region temperature difference estimation value;
- and
- a controller that controls said luminance of said image in accordance with said maximum peripheral region temperature difference estimation value.
3 more elements
A display device, comprising:
- a display having a display screen including a plurality of regions, that displays an image with a luminance related 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 temperature of said display screen;
- an operation device that determines a temperature difference estimation value in accordance with a reference value related to said temperature of said outer peripheral portion, and said temperature estimation value;
- and
- a control device that controls the luminance of the image based on the temperature difference estimation value.
2 more elements
Dependencies are inferred from the claim text.