Display drive apparatus, display apparatus and drive control method thereof

A display apparatus which displays image information corresponding to display data, the apparatus comprising:

• a display panel having a plurality of display pixels arranged therein, each of the pixels including a current control type optical element and a drive element which supplies a driving current to the optical element at each of respective intersections of a plurality of selection lines and a plurality of data lines arranged to respectively extend in a row direction and in a column direction;
• a selection drive unit which sequentially supplies a selection signal to each of the plurality of selection lines of the display panel, thereby setting the display pixels in each row sequentially in a selection state;
• and
• a data drive unit comprising:
• a gradation signal generation circuit which generates a gradation signal corresponding to a luminance gradation of the display data and supplies the gradation signal to said each display pixel via said each data line;
• a threshold voltage detection circuit which detects a threshold voltage peculiar to the drive element of said each display pixel via said each data line;
• and
• a compensation voltage application circuit which generates a compensation voltage for compensating for the threshold voltage of said each display pixel on the basis of said each threshold voltage and applies the compensation voltage to said each display pixel via said each data line.

A drive control method of a display drive apparatus which operates a current control type optical element of a display pixel provided with the optical element and a drive element which supplies a driving current to the optical element, the method comprising:

• detecting a threshold voltage peculiar to the drive element;
• generating a compensation voltage for compensating for the threshold voltage of the drive element on the basis of the threshold voltage and applying the compensation voltage to hold the voltage as a voltage component;
• and
• supplying a gradation signal to the display pixel, adding a voltage component based on the gradation signal to the voltage component based on the compensation voltage, and allowing the drive element to hold the voltage component.

A drive control method of a display apparatus which displays image information corresponding to display data, the apparatus comprising a display panel having a plurality of display pixels arranged therein, each of the pixels comprising a current control type optical element and a drive element which supplies a driving current to the optical element at respective intersections of a plurality of selection lines and a plurality of data lines arranged to respectively extend in a row direction and in a column direction, the method comprising:

• detecting a threshold voltage peculiar to the drive element of said each display pixel;
• generating a compensation voltage for compensating for the threshold voltage of the drive element on the basis of the threshold voltage, applying the compensation voltage to the drive element of said each display pixel, and holding the compensation voltage as a voltage component;
• supplying a gradation signal to said each display pixel, adding a voltage component based on the gradation signal to the voltage component based on the compensation voltage, and allowing the drive element of said each display pixel to hold the voltage component;
• and
• supplying the driving current created on the basis of the voltage component held in the drive element of said each display pixel to the optical element, and allowing the optical element to be operated in accordance with the gradation signal.