Display device and driving apparatus thereof
AssigneeSamsung Display Co., Ltd.
InventorsHai-Jung IN, Bo Yong CHUNG
Life of this patent
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Abstract
In a data driving apparatus, a DAC converts digital data output from a holding latch into an analog data voltage. An operational amplifier operates as a buffer which outputs the analog data voltage of the DAC to the signal line during a display period and operates as a comparator which compares the voltage of the signal line with the analog data voltage of the DAC during a sensing period. In addition, a sensing controller controls the holding latch to change the data stored in the holding latch according to a comparison value of the comparator.
Claims20
A data driving apparatus of a display device including a signal line connected to a pixel, the apparatus comprising:
- a holding latch configured to store input data;
- a digital analog converter configured to convert digital data output from the holding latch into an analog data voltage;
- an operational amplifier configured to operate as a buffer which outputs the analog data voltage of the digital analog converter to the signal line during a display period and to operate as a comparator which compares a voltage of the signal line with the analog data voltage of the digital analog converter during a sensing period;
- and
- a sensing controller configured to control the holding latch to change data stored in the holding latch according to a comparison value of the comparator.
A data driving apparatus of a display device including a signal line connected to a pixel, the apparatus comprising:
- a holding latch configured to store input data;
- a digital analog converter configured to convert digital data output from the holding latch into an analog data voltage;
- an operational amplifier having a non-inversion terminal for receiving an output of the digital analog converter, an inversion terminal, and an output terminal;
- a first switching element connected between the inversion terminal and the output terminal;
- a second switching element connected between the output terminal and the signal line;
- a third switching element connected between the inversion terminal and the signal line;
- and
- a sensing controller configured to turn on the first and second switching elements and turn off the third switching element during a first period, to turn off the first and second switching elements and turn on the third switching element during a second period, and to change the data stored in the holding latch based on an voltage of the output terminal.
A display device, comprising:
- a pixel;
- a signal line connected to the pixel to transfer the data voltage;
- a holding latch configured to store input data;
- a digital analog converter configured to convert a digital output of the level shifter to an analog data voltage;
- an operational amplifier configured to operate as a buffer which outputs the analog data voltage of the digital analog converter to the signal line during a display period and to operate as a comparator which compares a voltage of the signal line with the analog data voltage of the digital analog converter during a sensing period;
- and
- a sensing controller configured to control the holding latch to change data stored in the holding latch according to a comparison value of the comparator.
Dependencies are inferred from the claim text.