Amoled display and driving method thereof
First Claim
1. An emission control signal generating circuit of a flat panel display comprising a plurality of pixels, each said pixel including a plurality of EL elements, and emission of said elements being controlled by a plurality of emission control signals, the circuit comprising:
- a first signal generating device for generating one of the plurality of emission control signals as an output signal; and
a plurality of second signal generating devices for generating other ones of the plurality of emission control signals using the output signal of the first signal generating device and an external control signal.
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Accused Products
Abstract
An emission control circuit for controlling emission of R, G, B EL elements and method for driving an organic light emitting diode display using the same. An emission control signal generating circuit of a flat panel display includes a plurality of pixels. Each pixel includes a plurality of EL elements, and emission of the elements is controlled by emission control signals. The circuit includes a first signal generating device for generating one of the emission control signals, and a plurality of second signal generating devices for generating other ones of the emission control signals using an output signal of the first signal generating device and an external control signal. The first signal generating device may include a shift register. Each of the plurality of second signal generating devices may include a NAND gate using the external signal and the external control signal, or an inverted signal thereof, as two inputs.
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Citations
27 Claims
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1. An emission control signal generating circuit of a flat panel display comprising a plurality of pixels, each said pixel including a plurality of EL elements, and emission of said elements being controlled by a plurality of emission control signals, the circuit comprising:
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a first signal generating device for generating one of the plurality of emission control signals as an output signal; and
a plurality of second signal generating devices for generating other ones of the plurality of emission control signals using the output signal of the first signal generating device and an external control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An emission control signal generating circuit of an organic light emitting diode display comprising a plurality of pixels, each said pixel including R, G, B EL elements, emission of said elements being controlled by R, G, B emission control signals, the circuit comprising:
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a shift register for generating the G emission control signal as an output signal;
a first NAND gate for generating the R emission control signal using the output signal of the shift register and an external control signal as two inputs;
an inverting gate for inverting the external control signal to generate an inverted external control signal; and
a second NAND gate for generating the B emission control signal using the inverted external control signal and the output signal of the shift register as two inputs. - View Dependent Claims (12)
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13. An emission control signal generating circuit of an organic light emitting diode display comprising a plurality of pixels, each said pixel including R, G, B EL elements, and emission of said elements being controlled by R, G, B emission control signals, the circuit comprising:
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an inverting gate for inverting an external control signal to generate an inverted external control signal;
a shift register for generating the G emission control signal as an output signal;
a first transfer gate for transferring the output signal of the shift register as the R emission control signal using the inverted external control signal and the external control signal;
a second transfer gate for grounding the R emission control signal using the inverted external control signal and the external control signal;
a third transfer gate for transferring the output signal of the shift register as the B emission control signal using the inverted external control signal and the external control signal; and
a fourth transfer gate for grounding the B emission control signal using the inverted external control signal and the external control signal. - View Dependent Claims (14)
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15. An organic light emitting diode display, comprising:
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a plurality of gate lines, a plurality of data lines, a plurality of emission control lines, and a plurality of power supply lines;
a pixel portion including a plurality of pixels, each said pixel being connected to a corresponding said gate line, a corresponding said data line, a corresponding said emission control line and a corresponding said power supply line;
a gate line driving circuit for supplying the plurality of gate lines with a plurality of scan signals;
a data line driving circuit for sequentially supplying the plurality of data lines with R, G, B data signals; and
an emission control signal generating circuit for supplying the plurality of emission control lines with a plurality of emission control signals, wherein each said pixel includes R, G, B EL elements, which sequentially emit light based on the emission control signals per each of a plurality of subframes that form one frame, and wherein the emission control signal generating circuit includes;
a first signal generating device for generating one of the plurality of emission control signals as an output signal; and
a plurality of second signal generating devices for generating other ones of the plurality of emission control signals using the output signal of the first signal generating device and an external control signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. An organic light emitting diode display, comprising:
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a plurality of gate lines, a plurality of data lines, a plurality of emission control lines, and a plurality of power supply lines;
a pixel portion including a plurality of pixels, each said pixel being connected to a corresponding said gate line, a corresponding said data line, a corresponding said emission control line and a corresponding said power supply line;
a gate line driving circuit for supplying the plurality of gate lines with a plurality of scan signals;
a data line driving circuit for sequentially supplying the plurality of data lines with R, G, B data signals; and
an emission control signal generating circuit for supplying the plurality of emission control lines with R, G, B emission control signals, wherein each said pixel includes R, G, B EL elements, which sequentially emit light based on the R, G, B emission control signals per each of a plurality of subframes that form one frame, and wherein the emission control signal generating circuit includes;
a shift register for generating the G emission control signal as an output signal;
a first NAND gate for generating the R emission control signal using the output signal of the shift register and an external control signal as two inputs;
an inverting gate for inverting the external control signal to generate an inverted external control signal; and
a second NAND gate for generating the B emission control signal using the inverted external control signal and the output signal of the shift register as two inputs.
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25. An organic light emitting diode display, comprising:
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a plurality of gate lines, a plurality of data lines, a plurality of emission control lines, and a plurality of power supply lines;
a pixel portion including a plurality of pixels, each said pixel being connected to a corresponding said gate line, a corresponding said data line, a corresponding said emission control line and a corresponding said power supply line;
a gate line driving circuit for supplying the plurality of gate lines with a plurality of scan signals;
a data line driving circuit for sequentially supplying the plurality of data lines with R, G, B data signals; and
an emission control signal generating circuit for supplying the plurality of emission control lines with R, G, B emission control signals, wherein each said pixel includes R, G, B EL elements, which sequentially emit light based on the R, G, B emission control signals per each of a plurality of subframes that form one frame, and wherein the emission control signal generating circuit includes;
an inverting gate for inverting an external control signal to generate an inverted external control signal;
a shift register for generating the G emission control signal as an output signal;
a first transfer gate for transferring the output signal of the shift register as the R emission control signal using the inverted external control signal and the external control signal;
a second transfer gate for grounding the R emission control signal using the inverted external control signal and the external control signal;
a third transfer gate for transferring the output signal of the shift register as the B emission control signal using the inverted external control signal and the external control signal; and
a fourth transfer gate for grounding the B emission control signal using the inverted external control signal and the external control signal.
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26. A method for driving an organic light emitting diode display comprising a plurality of pixels, each said pixel including R, G, B EL elements, emission of said elements being controlled by R, G, B emission control signals, the method comprising:
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generating the G emission control signal during a first subframe among a plurality of subframes that form one frame to emit the G EL element;
generating the R emission control signal using the G emission control signal during a second said subframe to emit the R EL element;
generating the B emission control signal using the G emission control signal during a third said subframe to emit the B EL element; and
maintaining the EL elements to be a black color during a rest subframe among the plurality of subframes.
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27. A method for driving an organic light emitting diode display comprising a plurality of pixels, each said pixel including R, G, B EL elements, emission of said elements being controlled by R, G, B emission control signals, the method comprising:
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generating the G emission control signal during a first subframe among a plurality of subframes that form one frame to emit the G EL element;
generating the R emission control signal using the G emission control signal during a second said subframe to emit the R EL element;
generating the B emission control signal using the G emission control signal during a third said subframe to emit the B EL element; and
emitting one of the R, G, B EL elements during a rest subframe among the plurality of subframes.
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Specification