Abstract: Disclosed is a backlight apparatus comprising a plurality of light sources; and a control unit which drives the plurality of light sources at an identical driving frequency and which performs pulse-width modulation control for a turned-on period and a turned-off period of each of the light sources; wherein the control unit is capable of setting a duty ratio for each of the light sources and each of driving cycles; and the control unit sets the duty ratio for at least two of the light sources respectively so that a condition, in which one cycle period composed of one turned-on period and one turned-off period is N times the driving cycle, is fulfilled, and the duty ratio is 0 or 1 in at least one driving cycle of N pieces of the driving cycles for constructing the one cycle period if N is not less than 2.

Abstract: A light source apparatus includes: a light-emitting unit which includes a plurality of emission areas emitting light periodically at different phases and in which at least two light sources are disposed in each emission area; a detection unit configured to detect light from the light-emitting unit; and a control unit configured to select the plurality of light sources sequentially and to perform lighting-control of temporarily reducing emission brightness of light sources other than the selected light source, wherein the control unit selects lighting-control target light sources so that lighting-control is sequentially performed on light sources disposed in different emission areas among the plurality of emission areas.

Abstract: A lighting device includes a plurality of light sources corresponding to a plurality of areas of a screen, and a control unit configured to control at least one of a duty ratio between a lighting period and an light-out period and a drive current amount of each of the light sources based on input image data. The control unit controls lighting timings of the light sources in accordance with the drive current amounts of the light sources such that a fluctuation of the total of the drive current amounts of the light sources is suppressed.

Abstract: A lighting apparatus for an image display apparatus is provided with: a plurality of light sources corresponding to a plurality of areas of a screen; and a control unit configured to control a duty ratio of a turn-on period and a turn-off period of each light source according to an image signal to be inputted, by carrying out pulse width modulation control on the turn-on periods of time and the turn-off periods of time of the plurality of light sources. In cases where the duty ratio of each light source is controlled according to the image signal to be inputted, the control unit regulates turn-on start timing of each light source in such a manner that a variation in the number of light sources which are turned on at the same time to be suppressed.

Abstract: A light source apparatus includes: a light-emitting unit which includes a plurality of emission areas emitting light periodically at different phases and in which at least two light sources are disposed in each emission area; a detection unit configured to detect light from the light-emitting unit; and a control unit configured to select the plurality of light sources sequentially and to perform lighting-control of temporarily reducing emission brightness of light sources other than the selected light source, wherein the control unit selects lighting-control target light sources so that lighting-control is sequentially performed on light sources disposed in different emission areas among the plurality of emission areas.

Abstract: A lighting apparatus for an image display apparatus is provided with: a plurality of light sources corresponding to a plurality of areas of a screen; and a control unit configured to control a duty ratio of a turn-on period and a turn-off period of each light source according to an image signal to be inputted, by carrying out pulse width modulation control on the turn-on periods of time and the turn-off periods of time of the plurality of light sources. In cases where the duty ratio of each light source is controlled according to the image signal to be inputted, the control unit regulates turn-on start timing of each light source in such a manner that a variation in the number of light sources which are turned on at the same time to be suppressed.

Abstract: Disclosed is a backlight apparatus comprising a plurality of light sources; and a control unit which drives the plurality of light sources at an identical driving frequency and which performs pulse-width modulation control for a turned-on period and a turned-off period of each of the light sources; wherein the control unit is capable of setting a duty ratio for each of the light sources and each of driving cycles; and the control unit sets the duty ratio for at least two of the light sources respectively so that a condition, in which one cycle period composed of one turned-on period and one turned-off period is N times the driving cycle, is fulfilled, and the duty ratio is 0 or 1 in at least one driving cycle of N pieces of the driving cycles for constructing the one cycle period if N is not less than 2.