Patent ID: 9583054
Date: 2017-02-28
CPC Classifications: G09G,H01L

Claim:
1. A multiprimary display device having a plurality of pixels arranged in a matrix which includes a plurality of rows and a plurality of columns, each of the plurality of pixels being composed of a plurality of subpixels, the plurality of subpixels including at least four subpixels for displaying respectively different colors, the multiprimary display device comprising: a multiprimary display panel having the plurality of subpixels in each of the plurality of pixels; and a signal conversion circuit which converts an input image signal corresponding to three primaries into a multiprimary image signal corresponding to four or more primary colors, wherein, the plurality of subpixels composing each pixel are regrouped into a plurality of virtual pixels so as to perform display by using each of the plurality of virtual pixels as a smallest unit of multicolor displaying; the signal conversion circuit includes a low-range multiprimary signal generation section which generates a low-range multiprimary signal based on the input image signal, the low-range multiprimary signal being a signal in which a low-range component of the input image signal has been adapted to multiprimaries, a high-range luminance signal generation section which generates a high-range luminance signal based on the input image signal, the high-range luminance signal being a signal in which a high-range component of the input image signal has been subjected to luminance conversion, and a rendering process section which performs a rendering process onto the plurality of virtual pixels based on the low-range multiprimary signal and the high-range luminance signal; the low-range multiprimary signal generation section includes a first filter section capable of extracting a low-range component from the input image signal, and a multiprimary conversion section which adapts the low-range component extracted by the first filter section to multiprimaries; the high-range luminance signal generation section includes a luminance conversion section which subjects the input image signal to luminance conversion to generate a luminance signal, and a second filter section which extracts a high-range component of the luminance signal generated by the luminance conversion section as the high-range luminance signal; the signal conversion circuit further includes a chromaticity conversion section which subjects the input image signal to chromaticity conversion to generate a chromaticity signal, and a luminance/chromaticity change detection section which detects changes in luminance and chromaticity based on the luminance signal generated by the luminance conversion section and the chromaticity signal generated by the chromaticity conversion section; and as a frequency characteristics profile of the first filter section, one frequency characteristics profile is selected from among a plurality of predefined frequency characteristics profiles in accordance with a result of detection by the luminance/chromaticity change detection section.