Video display apparatus and video display method

A video display method in which light from a light source is irradiated onto a transmission type or reflection type display component having a light modulating function to display video, comprising:

• an APL detection step of detecting an average brightness level of an input video signal;
• a light amount control data production step of producing light amount control data for controlling an amount of the light irradiated onto the display component on the basis of the average brightness level detected in the APL detection step;
• and
• a light amount control step of controlling the amount of the light irradiated onto the display component on the basis of the light amount control data, wherein
• the light amount control data production step comprising the step of producing light amount control data such that the amount of the light irradiated onto the display component is controlled so as to be at a predetermined minimum level or at a level close thereto when the average brightness level detected in the APL detection step is within a range of not more than a first predetermined value.

A video display apparatus that irradiates light from a light source onto a transmission type or reflection type display component having a light modulating function to display video, comprising:

• APL detection means for detecting an average brightness level of an input video signal;
• light source control signal generation means for generating a light source control signal for dynamically controlling a brightness of the light source depending on the average brightness level detected by the APL detection means on the basis of the average brightness level;
• and
• light source driving means for driving the light source depending on the light source control signal generated by the light source control signal generation means, wherein
• the light source control signal generation means generates the light source control signal such that the amount of change in a level per unit time in the light source control signal is not more than a predetermined amount irrespectively of the change in the average brightness level detected by the APL detection means.

A video display apparatus that irradiates light from a light source onto a transmission type or reflection type display component having a light modulating function to display video, comprising:

• APL detection means for detecting an average brightness level of an input video signal;
• light source control signal generation means for generating a light source control signal for dynamically controlling a brightness of the light source depending on the average brightness level detected by the APL detection means;
• and
• light source driving means for driving the light source depending on the light source control signal generated by the light source control signal generation means, wherein
• the light source control signal generation means generates the light source control signal such that the amount of change in a level per unit time of the light source control signal in a case where the brightness of the light source is decreased is more than an amount of change in a case where the brightness of the light source is increased.

A video display apparatus that irradiates light from a light source onto a transmission type or reflection type display component having a light modulating function to display video, comprising:

• APL detection means for detecting an average brightness level of an input video signal;
• light source control signal generation means for generating a light source control signal for dynamically controlling a brightness of the light source depending on the average brightness level detected by the APL detection means on the basis of the average brightness level;
• and
• light source driving means for driving the light source on the basis of the light source control signal generated by the light source control signal generation means, wherein
• the light source control signal generation means generates the light source control signal so as to interrupt, every time a state where the brightness of the light source is controlled at an intermediate level smaller than a maximum level and larger than a minimum level is continued for a first predetermined time period, the dynamic control of the light source for at least a second predetermined time period.

A video display method in which light from a light source is irradiated onto a transmission type or reflection type display component having a light modulating function to display video, comprising:

• an APL detection step of detecting an average brightness level of an input video signal;
• and
• a light source driving step of dynamically driving the light source depending on the average brightness level detected in the APL detection step, wherein
• the light source driving step comprising the step of driving the light source such that the amount of change in the level per unit time of the brightness of the light source is not more than a predetermined amount irrespectively of the change in the average brightness level detected in the APL detection step.

A video display method in which light from a light source is irradiated onto a transmission type or reflection type display component having a light modulating function to display video, comprising:

• an APL detection step of detecting an average brightness level of an input video signal;
• and
• a light source driving step of dynamically driving the light source depending on the average brightness level detected in the APL detection step, wherein
• the light source driving step comprising the step of driving the light source such that the amount of change in the level per unit time of the brightness of the light source in a case where the brightness of the light source is decreased is higher than an amount of change in a case where the brightness of the light source is increased.

A video display method in which light from a light source is irradiated onto a transmission type or reflection type display component having a light modulating function to display video, comprising:

• an APL detection step of detecting an average brightness level of an input video signal;
• and
• a light source driving step of dynamically driving the light source on the basis of the average brightness level detected in the APL detection step, wherein
• the light source driving step comprises the step of driving the light source so as to interrupt, every time a state where the brightness of the light source is controlled at an intermediate level other than a maximum level and other than a minimum level is continued for a first predetermined time period, the dynamic control of the light source for at least a second predetermined time period.