Image display apparatus and image display method

An image display apparatus including a display unit that includes a plurality of pixel formation regions arranged in a matrix, and a light-source unit that, includes light sources of a plurality of colors to irradiate the display unit with light, and controls the light sources for a light-on state/light-off state on a per color basis, the image display apparatus displaying a color video image by dividing one frame period into a plurality of subframe periods, and by switching on a light source for the light-on state to select the color thereof on a per subframe period basis, the image display apparatus comprising:

• a color break strength calculating unit that determines a color break strength, serving as an index indicating the noticeability of a color break, of a color mixed component that is a mixture of two or more color components, in accordance with a target image that is an image to be displayed on the display unit during each frame period, and
• a light-source control unit that controls states of the light sources of the plurality of colors during each subframe period in accordance with the color break strength of each color mixed component,
• wherein one frame period includes a mono-color light-on subframe period during which the light sources of the plurality of colors light on with one color at a time, and an extension subframe period during which the light sources of the plurality of colors take any state,
• wherein if, with any color mixed component set as a component of interest and with the target image displayed on the display unit, a first pixel region is present as an area including one or more pixel formation regions where an image containing the component of interest is to be displayed, the color break strength calculating unit increases the color break strength of the component of interest more as a magnitude of the component of interest is larger in the first pixel region,
• wherein the light-source control unit controls the states of the light sources of the plurality of colors during the extension subframe period so that as the color break strength of a maximum color mixed component being a color mixed component having the highest color break strength is higher, a magnitude of the maximum color mixed component contained in light output from the light-source unit is larger during the extension subframe period, and
• wherein if the color break strengths of all the color mixed components contained in the light output from the light-source unit are smaller in magnitude than a predetermined color break strength, the light-source control unit controls the states of the light sources of the plurality of colors during the extension subframe period so that all the light sources of the plurality of colors are in the light-off state during the extension subframe period.

An image display apparatus including a display unit that includes a plurality of pixel formation regions arranged in a matrix, and a light-source unit that, includes light sources of a plurality of colors to irradiate the display unit with light, and controls the light sources for a light-on state/light-off state on a per color basis, the image display apparatus displaying a color video image by dividing one frame period into a plurality of subframe periods, and by switching on a light source for the light-on state to select the color thereof on a per subframe period basis, the image display apparatus comprising:

• a color break strength calculating unit that determines a color break strength, serving as an index indicating the noticeability of a color break, of a color mixed component that is a mixture of two or more color components, in accordance with a target image that is an image to be displayed on the display unit during each frame period, and
• a light-source control unit that controls states of the light sources of the plurality of colors during each subframe period in accordance with the color break strength of each color mixed component,
• wherein one frame period includes a mono-color light-on subframe period during which the light sources of the plurality of colors light on with one color at a time, and an extension subframe period during which the light sources of the plurality of colors take any state,
• wherein if, with any color mixed component set as a component of interest and with the target image displayed on the display unit, a first pixel region is present as an area including one or more pixel formation regions where an image containing the component of interest is to be displayed, the color break strength calculating unit increases the color break strength of the component of interest more as a magnitude of the component of interest is larger in the first pixel region,
• wherein the light-source control unit controls the states of the light sources of the plurality of colors during the extension subframe period so that as the color break strength of a maximum color mixed component being a color mixed component having the highest color break strength is higher, a magnitude of the maximum color mixed component contained in light output from the light-source unit is larger during the extension subframe period, and
• wherein if the color break strengths of all the color mixed components contained in the light output from the light-source unit are smaller in magnitude than a predetermined color break strength, the light-source control unit controls the states of the light sources of the plurality of colors during each extension subframe period so that a light source of any one color from among the light sources of the plurality of colors shifts to the light-on state during the extension subframe period and so that the light source of the color in the light-on state during the extension subframe period also shifts to the light-on state during the mono-color light-on subframe period but at a light emission level lower than a standard light emission level in view of a light emission level during the extension subframe period.