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US 10,540,924 B2Granted
Source driver
AssigneeSilicon Works Co., Ltd.
InventorsJae Kwan Lee, Jong Keun Hwang
Life of this patent
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Abstract
The present invention discloses a source driver that drives a source driver. The source driver is configured in such a manner that a source driving module for driving display data and a conversion module for converting a sensing signal of a display panel into sensing data share components thereof. Thus, the area of the source driver can be reduced.
Claims5
A source driver comprising:
- a source driving module comprising a DAC (Digital-Analog Converter), and configured to convert display data into a source signal for a driving period, and output the source signal to a display panel;
- and
- a conversion module configured to convert first sensing data of a previous period into a first sensing signal for a sensing period, and generate second sensing data by updating a comparison result into the first sensing data, the comparison result being obtained by comparing the first sensing signal to a second sensing signal obtained by sensing the display panel at a current period,
- wherein the conversion module is implemented as an analog-digital converter using the DAC, and
- wherein the DAC is shared with the source driving module and the conversion module, converts the display data of the source driving module into the source signal for the driving period, and converts the first sensing data of the conversion module into the first sensing signal for the sensing period.
2 more elements
A source driver comprising:
- a latch configured to store display data;
- a level shifter configured to perform level shifting on the display data of the latch;
- a register configured to store first sensing data of a previous period, generate second sensing data for a sensing period, and output the second sensing data;
- a switching circuit configured to select and provide the first sensing data of the register for the sensing period or select and provide the display data outputted from the level shifter for a driving period;
- a DAC configured to convert the display data provided from the switching circuit into a source signal for the driving period or convert the first sensing data provided from the switching circuit into a first sensing signal for the sensing period;
- an output buffer configured to drive the source signal outputted from the DAC for the driving period;
- a sample and hold circuit configured to provide a second sensing signal obtained by sensing a display panel at a current period;
- and
- a comparator configured to compare the first sensing signal and the second sensing signal for the sensing period,
- wherein the register generates the second sensing data by updating a comparison result of the comparator into the first sensing data, and
- wherein the sample and hold circuit, the comparator, and the register are implemented as an analog-digital converter using the DAC.
8 more elements
Dependencies are inferred from the claim text.