Driving apparatus, driver circuit, and image display apparatus

A driving apparatus for a matrix panel in which a modulation element is arranged in each of intersections of a matrix composed of a plurality of row wirings and a plurality of column wirings, comprising:

• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a correction circuit that corrects a voltage of the row selection signal so as to suppress a voltage variation of the row selection signal, which is caused due to at least a resistance of an output stage of the row driver circuit and a current caused to flow into the resistance;
• and
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information, the column driver circuit distributing unit pulse components constituting the modulation signal so as to suppress a change of a current flowing into the selected row wiring in one horizontal scanning period.

A driving apparatus for a matrix panel in which a modulation element is arranged in each of intersections of a matrix composed of a plurality of row wirings and a plurality of column wirings, comprising:

• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a correction circuit that corrects a voltage of the row selection signal through feedback of potential information of an output terminal in the row driver circuit;
• and
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information, the column driver circuit generating the modulation signals different in start reference time in one horizontal scanning period and/or obtained by using pulse width modulation and voltage amplitude modulation in combination.

A driving apparatus for a matrix panel in which a modulation element is arranged in each of intersections of a matrix composed of a plurality of row wirings and a plurality of column wirings, comprising:

• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a correction circuit that corrects a voltage of the row selection signal through feedback of potential information of an output terminal in the row driver circuit;
• and
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information, the column driver circuit distributing unit pulse components constituting the modulation signal so as to suppress a change of a current flowing into the selected row wiring in one horizontal scanning period.

A driving apparatus for a matrix panel in which a modulation element is arranged in each of intersections of a matrix composed of a plurality of row wirings and a plurality of column wirings, comprising:

• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information;
• a correction circuit that corrects a voltage of the row selection signal so as to suppress a voltage variation of the row selection signal, which is caused due to at least a resistance of an output stage of the row driver circuit and a current caused to flow into the resistance;
• and
• a feed-forward circuit formed in the correction circuit and adapted to correct the row selection signal supplied to the selected row wiring in accordance with the gradation information.

A driving apparatus for a modulation element array in which a modulation element is arranged in each of intersections of a matrix composed of a row wiring and a plurality of column wirings, comprising:

• a row driver circuit adapted to supply a row signal to the row wiring;
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal modulated in accordance with gradation information;
• a first correction circuit adapted to correct a voltage of the row signal through feedback of potential information of an output terminal in the row driver circuit;
• and
• a second correction circuit adapted to correct a voltage drop due to a resistance of a connection member between the output terminal and the element array and a current flowing into the resistance.

An image display apparatus comprising:

• (i) a matrix panel including:
• a plurality of row wirings;
• a plurality of column wirings;
• and a plurality of modulation elements arranged in each of intersections of a matrix composed of the plurality of row wirings and the plurality of column wirings;
• and
• (ii) a driving apparatus for the matrix panel, including:
• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information, the column driver circuit generating the modulation signals different in start reference time in one horizontal scanning period and/or obtained by using pulse width modulation and voltage amplitude modulation in combination;
• and
• a correction circuit that corrects a voltage of the row selection signal so as to suppress a voltage variation of the row selection signal due to a voltage drop caused by at least a resistance of an output stage of the row driver circuit and a current flowing into the selected row wiring according to gradation information.

An image display apparatus comprising:

• (i) a matrix panel including:
• a plurality of row wirings;
• a plurality of column wirings;
• and a plurality of modulation elements arranged in each of intersections of a matrix composed of the plurality of row wirings and the plurality of column wirings;
• and
• (ii) a driving apparatus for the matrix panel, including:
• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information, the column driver circuit distributing unit pulse components constituting the modulation signal so as to suppress a variation of a current flowing into the selected row wiring in one horizontal scanning period;
• and
• a correction circuit that corrects a voltage of the row selection signal so as to suppress a voltage variation of the row selection signal due to a voltage drop caused by at least a resistance of an output stage of the row driver circuit and a current flowing into the selected row wiring according to gradation information.

An image display apparatus comprising:

• (i) a matrix panel including:
• a plurality of row wirings;
• a plurality of column wirings;
• and a plurality of modulation elements arranged in each of intersections of a matrix composed of the plurality of row wirings and the plurality of column wirings;
• and
• (ii) a driving apparatus for the matrix panel, including:
• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information, the column driver circuit generating the modulation signals different in start reference time in one horizontal scanning period and/or obtained by using pulse width modulation and voltage amplitude modulation in combination;
• and
• a correction circuit that corrects a voltage of the row selection signal through feedback of potential information of an output terminal in the row driver circuit.

An image display apparatus comprising:

• (i) a matrix panel including:
• a plurality of row wirings;
• a plurality of column wirings;
• and a plurality of modulation elements arranged in each of intersections of a matrix composed of the plurality of row wirings and the plurality of column wirings;
• and
• (ii) a driving apparatus for the matrix panel, including:
• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information, the column driver circuit distributing unit pulse components constituting the modulation signal so as to suppress a change of a current flowing into the selected row wiring in the one horizontal scanning period;
• and
• a correction circuit that corrects a voltage of the row selection signal through feedback of potential information of an output terminal in the row driver circuit.

An image display apparatus comprising:

• (i) a matrix panel including:
• a plurality of row wirings;
• a plurality of column wirings;
• and a plurality of modulation elements arranged in each of intersections of a matrix composed of the plurality of row wirings and the plurality of column wirings;
• and
• (ii) a driving apparatus for the matrix panel, including:
• a row driver circuit adapted to supply a row selection signal to the row wiring selected among the plurality of row wirings;
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information;
• a correction circuit that corrects an output voltage of the row selection signal so as to suppress a voltage variation of the row selection signal due to a voltage drop caused by at least a resistance of an output stage in the row driver circuit and a current flowing into the selected row wiring according to gradation information;
• and
• a feed-forward circuit formed in the correction circuit and adapted to correct the row selection signal supplied to the selected row wiring in accordance with the gradation information.

An image display apparatus comprising:

• (i) a matrix panel including:
• a row wiring;
• a plurality of column wirings;
• and a plurality of modulation elements arranged in each of intersections of a matrix composed of the row wiring and the plurality of column wirings;
• and
• (ii) a driving apparatus for the matrix panel, including:
• a row driver circuit adapted to supply a row signal to the row wiring;
• a column driver circuit adapted to supply to the plurality of column wirings a modulation signal having a pulse width and a voltage amplitude with at least the pulse width modulated according to gradation information;
• a first correction circuit adapted to correct a voltage of the row signal through feedback of potential information of an output terminal in the row driver circuit;
• and
• a second correction circuit adapted to correct a voltage drop due to a resistance of a connection member between the output terminal and the matrix panel and a current flowing into the resistance.

A driver circuit having a driving output terminal connected with an emission element through a connection member, comprising:

• a driving transistor in which a pair of main electrodes are connected to the driving output terminal side and a reference voltage source side;
• an operational amplifier as a control circuit adapted to control an output voltage from the driving transistor;
• a detecting transistor adapted to detect a current flowing into the driving transistor;
• and
• a correction circuit adapted to correct the output voltage from the driving output terminal,
• wherein the correction circuit includes a feedback loop adapted to detect a current flowing into the detecting transistor for feedback to the operational amplifier as the control circuit.

A driver circuit having a driving output terminal connected with an emission element through a connection member, comprising:

• a driving transistor in which a pair of main electrodes are connected to the driving output terminal side and a reference voltage source side;
• a control circuit adapted to control an output voltage from the driving transistor;
• a detecting transistor adapted to detect a current flowing into the driving transistor;
• and
• a correction circuit adapted to correct the output voltage from the driving output terminal,
• wherein the correction circuit includes a first feedback loop adapted to detect the output voltage of the driving output terminal for feedback to the control circuit and a second feedback loop adapted to detect a current flowing into the detecting transistor for feedback to the control circuit.

An image display apparatus comprising:

• (i) a matrix panel including:
• a plurality of row wirings;
• a plurality of column wirings;
• and a plurality of modulation elements arranged in each of intersections of a matrix composed of the plurality of row wirings and the plurality of column wirings;
• (ii) a driving device adapted to drive the matrix panel, which includes:
• a driving transistor in which a pair of main electrodes are connected to the driving output terminal side adapted to supply a signal and a reference voltage source side;
• a control circuit adapted to control an output voltage from the driving transistor;
• a detecting transistor adapted to detect a current flowing into the driving transistor;
• a feedback loop adapted to detect a current flowing into the detecting transistor for feedback to the control circuit;
• and
• a correction circuit adapted to correct the output voltage from the driving output terminal;
• and
• (iii) a connection member that electrically connects the matrix panel and the driving device to thereby supply a signal adapted to drive the modulation element.