Organic electroluminescent display
First Claim
1. An organic light-emitting display screen, comprising:
- n×
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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Accused Products
Abstract
An organic light-emitting display screen includes n×m picture dots organized in a matrix with m rows and n columns. Each picture dot includes an organic diode and first and second driver circuits for the diode. Each of the first and second driver circuits includes a driving transistor connected between a reference voltage and one electrode of the diode, a switching transistor for switching a gate voltage onto a gate of the driving transistor, and a capacitor connected to the gate of the driving transistor. A circuit for addressing each of the n×m picture dots, to control alternately and simultaneously a recovery phase on one driver circuit and a display phase on the other driver circuit of a picture dot, includes as row select lines, only m row select lines, one per row of picture dots, and/or as data lines, only n data lines, one per column of picture dots.
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Citations
9 Claims
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1. An organic light-emitting display screen, comprising:
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n×
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, and a capacitor connected to the gate of the driving transistor and the reference voltage, to maintain a gate voltage, wherein said 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, and the 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 frame the 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, and the 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, and during 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 frame the 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, and the 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification