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US 8,026,926 B2Granted
Image display device and image display method
AssigneeSeiko Instruments Inc.
InventorKenichi Matsushima
Life of this patent
Estimating the term…
Abstract
Provided is a structure in which an input image is normalized by a normalization value in a case where an amount of saturation is within an allowable range so as to adjust an intensity of a backlight according to the normalization value. Allowing slight saturation of an image thereby, effectively reduce the power consumption in the backlight.
Claims34
An image display device for displaying an input image, comprising:
- a normalization value calculator for obtaining, from the input image, a normalization value for normalization by saturating the input image, wherein the normalization value calculator comprises:
- a counter for counting the input image to generate a frequency distribution;
- an accumulator for accumulating the frequency distribution to obtain a saturation amount;
- and
- determination means for determining the normalization value so as to hold the saturation amount within an allowable range;
- a normalizer for normalizing the input image by the normalization value;
- a light adjuster for adjusting an intensity of light for displaying based on the normalization value so as to compensate a change in brightness of an image obtained by the normalizer;
- and
- a light modulation display for modulating the light from the light adjuster based on changing one of transmittance and reflectance, to display the image sent from the normalizer.
6 more elements
An image display device for displaying an input image, comprising:
- a normalization value calculator for obtaining, from the input image, a normalization value for normalizing by saturating the input image;
- a normalizer for normalizing the input image by the normalization value;
- a light amount calculator for calculating a light amount value based on a value corresponding to brightnesses of the image before and after an operation in the normalizer so as to compensate a change in brightness of an image obtained by the normalizer;
- a light adjuster for adjusting an intensity of light for displaying based on the light amount value;
- and
- a light modulation display for modulating the light from the light adjuster based on changing one of transmittance and reflectance, to display the image sent from the normalizer.
3 more elements
An image display device for displaying an input image, comprising:
- a normalization value calculator for obtaining, from the input image, a normalization value for normalizing by saturating the input image;
- a normalizer for normalizing the input image by the normalization value;
- a brightness converter for converting a brightness of the image normalized by the normalizer and obtaining a brightness ratio of the image before and after a brightness conversion;
- a light amount calculator for calculating a combined light amount value so as to compensate a change in brightness of each of the images obtained by the normalizer and the brightness converter;
- a light adjuster for adjusting an intensity of light for displaying based on the combined light amount value;
- and
- a light modulation display for modulating the light from the a light adjuster based on changing one of transmittance and reflectance, to display the image with the brightness converted by the brightness converter.
4 more elements
An image display method of displaying an input image, comprising:
- a normalization value calculating step of obtaining, from the input image, a normalization value for normalization by saturating the input image, wherein the normalization value calculating step comprises:
- a counting step of counting the input image to generate a frequency distribution;
- a accumulation step of accumulating the frequency distribution to obtain a saturation amount;
- and
- a determination step of determining the normalization value so as to hold the saturation amount within an allowable range;
- a normalization step of normalizing the input image by the normalization value;
- a light source adjustment step of adjusting an intensity of light for display based on the normalization value so as to compensate for a change in brightness of an image obtained in the normalization step;
- and
- a light modulation display step of modulating the light obtained in the light source adjustment step based on one of transmittance and reflectance to be changed, to display the image sent from the normalization step.
6 more elements
An image display method of displaying an input image, comprising:
- a normalization value calculating step of obtaining, from the input image, a normalization value for normalization by saturating the input image;
- a normalization step of normalizing the input image by the normalization value;
- a light amount calculating step of calculating a light amount value based on a value corresponding to brightnesses of the image before and after an operation in the normalization step so as to compensate a change in brightness of an image obtained in the normalization step;
- a light source adjustment step of adjusting an intensity of light for displaying based on the light amount value;
- and
- a light modulation display step of modulating the light obtained in the light source adjustment step based on changing one of transmittance and reflectance, to display the image sent from the normalization step.
3 more elements
An image display method of displaying an input image, comprising:
- a normalization value calculating step of obtaining, from the input image, a normalization value for normalization by saturating the input image;
- a normalization step of normalizing the input image by the normalization value;
- a brightness converting step of converting a brightness of the image normalized in the normalization step and obtaining an image brightness ratio before and after conversion;
- a light amount calculating step of calculating a combined light amount value so as to compensate a change in brightness of each of the images obtained in the normalization step and the brightness converting step;
- a light source adjustment step of adjusting an intensity of light for display based on the combined light amount value;
- and
- a light modulation display step of modulating the light in the light source adjustment step based on changing one of transmittance and reflectance, to display the image with the brightness converted in the brightness converting step.
4 more elements
Dependencies are inferred from the claim text.