Display apparatus and drive control method thereof

  • US 7,868,880 B2
  • Filed: 05/23/2006
  • Issued: 01/11/2011
  • Est. Priority Date: 05/24/2005
  • Status: Active Grant
First Claim
Patent Images

1. A display apparatus for displaying image information corresponding to display data, comprising:

  • a display panel including a plurality of display pixels arranged thereon in vicinities of respective intersections of a plurality of scanning lines arranged in a row direction and a plurality of data lines arranged in a column direction;

    a plurality of bias lines provided on the display panel along the scanning lines, respectively;

    a scanning drive unit which sequentially applies a scanning signal to each of said plurality of scanning lines and sets the display pixels corresponding to each said scanning line to a selection state;

    a data drive unit which generates a gradation signal corresponding to the display data and supplies the gradation signal to the display pixels set to the selection state;

    a power source drive unit which supplies to the display pixels a drive voltage for controlling a drive state of each of the display pixels;

    a state setting unit; and

    a drive control unit which controls the power source drive unit to operate to set the display pixels to a non-display operation state during a non-display period in which the display pixels do not display the display data, and controls the scanning drive unit to operate to set the display pixels to the selection state during the non-display period,wherein each of the plurality of display pixels comprises an optical element and a display drive circuit which controls an operation of the optical element, the display drive circuit comprising an electric charge accumulation circuit which holds a voltage component corresponding to the gradation signal, a supply control circuit which generates a drive current having a predetermined current value based on the voltage component held in the electric charge accumulation circuit, and which supplies the drive current to the optical element, and a writing control circuit which controls a supply state of electric charges, based on the gradation signal, to the electric charge accumulation circuit, andwherein the state setting unit eliminates a bias state set corresponding to the display data based on the gradation signal to the display drive circuit of the display pixels in each row, generates a setting signal for setting a specific bias state, applies the setting signal to each of the bias lines, and applies the setting signal to the display pixels for each row of the display panel.

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