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Driver with driving current interruption

  • US 7,817,114 B2
  • Filed: 11/23/2004
  • Issued: 10/19/2010
  • Est. Priority Date: 12/04/2003
  • Status: Expired due to Fees
First Claim
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1. A display apparatus comprising:

  • a plurality of pixel circuits arranged in a matrix, wherein each of the pixel circuits comprises;

    a light emitting element;

    a drive transistor for supplying the light emitting element with a drive current of a quantity corresponding to a gate potential of the drive transistor;

    a first switch for switching between a first drive state of shutting off the drive current to the light emitting element and a second drive state of flowing the drive current to the light emitting element to control a flow of the drive current supplied to the light emitting element;

    a second switch for switching between a first scan state of setting the gate potential of the drive transistor and a second scan state of keeping the set gate potential of the drive transistor;

    a row drive circuit for generating, in response to a clock of an active matrix display operation, a first scan line signal to be applied to the first switch through a scan line so that the first switch switches between the first and second drive states, and a second scan line signal to be applied to the second switch through the scan line so that the second switch switches between the first and second scan states; and

    a column drive circuit for generating, in response to an image signal, a data signal to be applied to each of the pixel circuits through a data line,wherein said row drive circuit applies, in response to turn-on of a power source or start of a waiting state, a switch control signal to the first and second switches for all of the pixel circuits through the scan line for a predetermined interval after the turn-on of the power source or a waiting state interval, as a priority signal to the first and second scan signals so that, for all of the pixel circuits, the first switch becomes the first drive state and the second switch becomes the first scan state for the predetermined interval or the waiting state interval, andwherein the column drive circuit shuts off the data signal or applies a predetermined low level signal on the data line for all of the pixel circuits during the predetermined interval after the turn-on of the power source or the waiting state interval and prior to a normal display drive period.

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