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Organic electroluminescent display

  • US 9,224,331 B2
  • Filed: 04/27/2007
  • Issued: 12/29/2015
  • Est. Priority Date: 04/28/2006
  • Status: Expired due to Fees
First Claim
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1. An organic light-emitting display screen, comprising:



  • m picture dots organized in a matrix with m rows and n columns, m and n being integers greater than or equal to 1;

    a circuit for addressing the n×

    m picture dots, including m row select lines, the picture dots of a given row being connected to a respective row select line among said m row select lines for selection of said given row and to another row select line among said m row select lines, said another row select line configured for selection of another row of picture dots;

    n data lines, one for each of the n columns of picture dots, to apply a video voltage to a picture dot of a respective column and a currently selected row; and

    each picture dot including an organic electroluminescent (OLED) diode and first and second driver circuits for the OLED,each of the first and second driver circuits including;

    a driving transistor connected between a reference voltage and one electrode of the OLED,a switching transistor for connecting data line of the respective column to a gate of the driving transistor,an additional transistor for applying a turn-off voltage onto the gate of the driving transistor, anda capacitor connected to the gate of the driving transistor and the reference voltage, to maintain a gate voltage, whereinsaid respective row select line for the picture dot is connected to a gate of the switching transistor of the first driver circuit and to a gate of the additional transistor of the second driver circuit,said another row select line for the picture dot is connected to a gate of the switching transistor of the second driver circuit and to a gate of the additional transistor of the first driver circuit, andthe circuit for addressing each of the n×

    m picture dots sequentially selects each of successive row select lines from top to bottom of the matrix during one frame and from bottom to top during a next frame such that only one row select line is selected at any given time,during a first frame said respective row select line is selected before said another row select line is subsequently selected, wherein during the first framethe driving transistor of the first driver circuit is put into a display phase when said respective row select line is selected and before said another row select line is subsequently selected and is put into a recovery phase when said another row select line is selected, andthe driving transistor of the second driver circuit is put into the recovery phase when said respective row select line is selected and before said another row select line is subsequently selected and is put into the display phase when said another row select line is selected, andduring a second frame subsequent to the first frame, said another row select line is selected before said respective row select line is subsequently selected, wherein during the second framethe driving transistor of the first driver circuit is put into the recovery phase when said another row select line is selected and before said respective row select line is subsequently selected and is put into the display phase when said respective row select line is selected, andthe driving transistor of the second driver circuit is put into the display phase when said another row select line is selected and before said respective row select line is subsequently selected and is put into the recovery phase when said respective row select line is selected.

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