VIDEO DISPLAY DEVICE Russian patent published in 2013 - IPC H04N9/64 

FIELD: information technology.

SUBSTANCE: image processing circuit corrects colour in a predetermined colour range so that it is corrected such that it partially includes the reference range of red hue, lying in the centre of the colour range of the constant hue, lying from the achromatic colour which is the colour of the lowest saturation in the extended colour reproduction region, to the red colour having the highest colour saturation in the extended colour reproduction range, but does not include red colour having the highest colour saturation in the extended colour reproduction range. At that moment, the image processing circuit corrects said colour such that its hue is replaced with hue lying close to the yellow colour in the extended colour reproduction range, and hue from the reference range of red hue is replaced with red colour hue in the sRGB standard colour reproduction range, and further, the value by which the hue changes to hue lying close to the yellow colour is less than the colour lying further from the reference range of red hue in the extended colour reproduction range than for the colour lying close to the reference range of red hue in the extended colour reproduction range.

EFFECT: providing a video display device capable of displaying video using a display with a wide colour gamma based on a video signal corresponding to a standard having a narrower colour reproduction range than the range of the display with a wide colour gamma, while solving the problem of hue shift when displaying red colour with average saturation.

3 cl, 9 dwg