JP2006065242A5 - - Google Patents

Claims (8)

An EL display device having a display area in which pixels are arranged in a matrix,
  A voltage generating circuit for generating at least one of an anode voltage and a cathode voltage of the pixel;
  An arithmetic circuit for obtaining data corresponding to the magnitude of a current flowing in the display area from a video signal input to the EL display device;
  The EL display device, wherein the voltage generation circuit can vary at least one of the anode voltage and the cathode voltage based on data obtained by the arithmetic circuit. The pixel includes an EL element, a driving transistor for supplying current to the EL element, and a switch element disposed in a current path through which the current flows.
  The EL display device according to claim 1, wherein the current in the current path is controlled by turning on and off the switch element. A signal generation circuit for applying a display signal to the pixel;
  2. The EL display device according to claim 1, wherein the reference position of the display signal is set to a reference position that is not variable among an anode voltage and a cathode voltage. The pixel includes an EL element and a driving transistor for supplying current to the EL element,
  The driving transistor is a P-channel transistor,
  The EL display device according to claim 1, wherein the voltage generation circuit maintains the anode voltage at a predetermined voltage and varies the cathode voltage. The EL display device according to claim 1, wherein the pixel has a pixel configuration for performing current programming. A method of driving an EL display device having a display area in which pixels are arranged in a matrix,
  A period in which the first current flows in the display area is a first period, a period in which the second current flows in the display area is a second period,
  When there is a relationship of the second current> the first current,
  The potential difference between the anode voltage and the cathode voltage in the second period <The potential difference between the anode voltage and the cathode voltage in the first period. A method of driving an EL display device having a display area in which pixels are arranged in a matrix,
  A driving method of an EL display device, wherein a potential difference between an anode voltage and a cathode voltage can be varied in accordance with a magnitude of a current flowing in the display region. The pixel includes an EL element, a driving transistor for supplying current to the EL element, and a switch element disposed in a current path through which the current flows.
  8. The method of driving an EL display device according to claim 6, wherein the switch element is turned on / off to control a current in the current path.