Illumination apparatus, illumination control method, and display apparatus

An illumination control method comprising:

• performing a time division operation on a value represented by a first luminance control signal of a first bit number for controlling luminance of a light source to generate second luminance control signals each having a second bit number that is smaller than the first bit number;
• generating third luminance control signals each having a pulse width that corresponds to one of the values represented by the second luminance control signals;
• generating drive signals for causing the light source to emit light on the basis of the third luminance control signals;
• and
• supplying the drive signals to the light source.

A display apparatus comprising:

• an image analysis unit calculating a coefficient of expansion from a first image including first to third subpixels and generating a first luminance control signal of a first bit number for controlling luminance of a light source;
• an image generation unit generating a second image including the first to third subpixels and a fourth subpixel on the basis of the coefficient of expansion;
• and
• a light source control unit
• performing a time division operation on a value represented by the first luminance control signal to generate second luminance control signals each having a second bit number that is smaller than the first bit number,
• generating third luminance control signals each having a pulse width that corresponds to one of the values represented by the second luminance control signals,
• generating drive signals for controlling the light source on the basis of the third luminance control signals, and
• supplying the drive signals to the light source.