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US 11,107,419 B2Granted
Display device and method of driving the same
AssigneeSamsung Display Co., Ltd.
InventorsKi Hyun Pyun, Jang Hoon Kwak, Min Young Park
Life of this patent
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Abstract
A display device may extract an edge of a data signal based on the data signal and phase conversion clock signals, extract a phase of the data signal based on the edge, and generate a clock phase calibration signal based on the phase of the data signal. The display device may calibrate a phase of a clock signal using the clock phase calibration signal that has a phase corresponding to the phase of the clock signal, thereby improving transmission characteristic of the signal.
Claims20
A display device, comprising:
- a display panel including pixels;
- data driving circuits configured to generate data voltages based on a first data signal and to supply the data voltages to the pixels;
- and
- a timing controller configured to interface with each of the data driving circuits through a first interface and further configured to interface in common with data driving circuits through a second interface,
- wherein the timing controller transmits the first data signal to the data driving circuits through the first interface, and transmits a second data signal to the data driving circuits through the second interface,
- wherein each of the data driving circuits comprises:
- a clock recovery circuit configured to recover a clock signal from the first data signal, generate a recovered clock signal, and generate a reference clock signal based on the recovered clock signal;
- a clock generator configured to generate phase conversion clock signals having different phases by shifting a phase of the reference clock signal;
- and
- a clock phase calibrator configured to extract an edge of the second data signal based on the second data signal and the phase conversion clock signals, extract a phase of the second data signal based on the edge, and generate a clock phase calibration signal based on the phase of the second data signal,
- wherein the phase of the reference clock signal is changed in response to the clock phase calibration signal.
8 more elements
A method of driving a display device, comprising:
- transmitting a first data signal from a timing controller to each of data driving circuits through a first interface;
- transmitting a second data signal from the timing controller to the data driving circuits through a second interface that is different from the first interface;
- recovering a clock signal from the first data signal and generating a reference clock signal based on the clock signal;
- generating phase conversion clock signals having different phases by shifting a phase of the reference clock signal;
- extracting an edge of the second data signal based on the second data signal and the phase conversion clock signals;
- extracting a phase of the second data signal based on the edge and generating a clock phase calibration signal based on the phase of the second data signal;
- and
- changing the phase of the reference clock signal in response to the clock phase calibration signal.
5 more elements
Dependencies are inferred from the claim text.