Backlight driving method of liquid crystal display device, backlight driving device, and liquid crystal display device

A backlight driving method of a liquid crystal display device for illuminating, when a video signal is displayed on a liquid crystal panel, a corresponding display region on said liquid crystal panel by using each light-emitting block of a backlight which has been divided into a plurality of light-emitting blocks each being able to independently emit light, said backlight driving method comprising:

• a step of recording, for said light-emitting block and so as to be readable, a predetermined amount of leakage of light leaked into a rear side of said display region corresponding to said given light-emitting block from an adjacently-placed light-emitting block occurring when the light-emitting block adjacent to a given light-emitting block is made to emit light according to a lighting control signal generated based on a control signal component.
• a step of detecting the control signal component to be used for a lighting control signal from said video signal for every said light-emitting block;
• a step of letting said light-emitting block corresponding to said backlight be made to emit light according to said lighting control signal generated based on each of the detected control signal component;
• a step of measuring an intensity of light to be received for said light-emitting block;
• a step of reading an amount of light leakage from said recording unit based on said detected control signal component;
• and
• a step of correcting the light emission from said given light-emitting block according to said detected control signal component, said measured intensity of light, said read amount of light leakage, each corresponding to said given light-emitting block.

A backlight driving device of a liquid crystal display device having a liquid crystal panel to display a video signal and a backlight divided into a plurality of light-emitting blocks each being able to independently emit light which illuminates a corresponding display region on said liquid crystal panel by each of light-emitting blocks, comprising:

• a recording unit to record a predetermined rate of leakage of light leaked from a light-emitting block being adjacent to a given light-emitting block into a rear side of the display region corresponding to said given light-emitting block illuminated by said given light-emitting block so as to be readable for every said light-emitting block based on a control signal component contained in said video signal and to be used for generating a lighting control signal for every light-emitting block;
• a detecting unit to detect the control signal component from said video signal and to be used for generating a lighting control signal for every said light-emitting block;
• a light-emission control unit to let the corresponding light emitting block emit light by said lighting control signal generated based on each of said control signal component detected by said detecting unit;
• a measuring unit to measure an intensity of light received for every said light-emitting block;
• a reading unit to read the light leakage rate from said recording unit based on the detected control signal component;
• a calculating unit to calculate an amount of leakage of light leaked from said light-emitting block being adjacent to said given light-emitting block into the rear side of said display region corresponding to said given light-emitting block based on said control signal component detected in the adjacently-placed light-emitting block and on the read-out light leakage rate;
• and
• a correcting unit to correct emitted light of said given light-emitting block based on said control signal component detected by said detecting unit, the light intensity measured by said measuring unit, and the amount of light leakage calculated by said calculating unit each corresponding to said given light-emitting block.

A backlight driving device of a liquid crystal display device having a liquid crystal panel to display a video signal and a backlight divided into a plurality of light-emitting blocks each being able to independently emit light which illuminates a corresponding display region in said liquid crystal panel by each of light-emitting blocks, comprising:

• a recording unit to record, for said light-emitting block and so as to be readable, a predetermined amount of leakage of light leaked into a rear side of said display region corresponding to said given light-emitting block from an adjacently-placed light-emitting block occurring when the light-emitting block adjacent to a given light-emitting block is made to emit light according to a lighting control signal generated based on a control signal component contained in said video signal and to be used for generation of a lighting control signal for each light-emitting block;
• a detecting unit to detect the control signal component to be used for a lighting control signal from said video signal for every said light-emitting block;
• a light-emission control unit to let the corresponding light emitting block emit light by said lighting control signal generated based on each of said control signal component detected by said detecting unit;
• a measuring unit to measure an intensity of light to be received for every said light-emitting block;
• a reading unit to read the light leakage rate from said recording unit based on the detected control signal component;
• and
• a correcting unit to correct emitted light of said given light-emitting block based on said control signal component detected by said detecting unit, the light intensity measured by said measuring unit, and the amount of light leakage read by said reading unit each corresponding to said given light-emitting block.