Back to results
US 8,077,259 B2Granted
Video signal converter, video display device, and video signal converting method
AssigneeSharp Kabushiki Kaisha
InventorsXiaomang Zhang, Naoko Kondoh
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSharp Kabushiki Kaisha
InventorsXiaomang Zhang, Naoko Kondoh
Estimating the term…
When each value of luminance signals of three primary colors in the primary video signal is less than the output lower limit value, in short, when the gradation level is negative, the negative gradation level of the present primary color is, in accordance with its magnitude, in other words, in accordance with the absolute value of the negative gradation level, replaced with positive gradation levels of other two primary colors. Therefore, in accordance with A VIDEO SIGNAL CONVERTER of this invention, even when the primary video signal includes a signal value having a negative gradation level, in short, even when one or more of each signal value of RGB is below the output lower limit value, a color according to the combination of those gradation levels (a combination of each level of primary colors (RGB)) can be reproduced (displayed) by a display means.
A video signal converter for converting a primary video signal composed of luminance signals of each primary color (RGB) that may obtain a signal value within an extended range partially including an output range from a predetermined output lower limit value to an output upper limit value, into a secondary video signal, as a video signal to be input into a prescribed video display means, and composed of luminance signals of each primary color (RGB) that may obtain a value in the output range, comprising:
A video signal converter for converting a primary video signal composed of luminance signals of each primary color (RGB) that may obtain a signal value in an extended range partially including an output range from a predetermined output lower limit value to an output upper limit value, into a secondary video signal, as a video signal to be input into a prescribed video display means, composed of luminance signals of each primary color (RGB) that may obtain a value in the output range, comprising:
A video signal converter for converting a primary video signal composed of luminance signals of each primary color (RGB) that may obtain a signal value in an extended range as a range of normalized value from a negative value to a value greater than 1 into a secondary video signal which is a video signal to be input into a prescribed video display means and is composed of luminance signals of each primary color (RGB) that may obtain a value in an output range as a normalized value from 0 to 1, comprising:
A video signal converting method for converting a primary video signal composed of luminance signals of each primary color (RGB) that may obtain signal values in an extended range partially including an output range from a predetermined output lower limit value to an output upper limit value, into a secondary video signal, as a video signal to be input into a prescribed video display means, composed of luminance signals of each primary color (RGB) that may obtain values in the output range, which conducts,
A video signal converting method for converting and outputting a primary video signal composed of luminance signals of each primary color (RGB) that may obtain signal values in an extended range partially including an output range from a predetermined output lower limit value to an output upper limit value, into a secondary video signal, as a video signal to be input into a prescribed video display means, composed of luminance signals of each primary color (RGB) that may obtain values in
A video signal converting method for converting and outputting a primary video signal composed of luminance signals of each primary color (RGB) that may obtain signal values in an extended range as a range of normalized value from a negative value to a value greater than 1 into a secondary video signal as a video signal to be input into a prescribed video display means, composed of luminance signals of each primary color (RGB) that may obtain values in an output range as a normalized value from 0 to 1, which conducts,
Dependencies are inferred from the claim text.