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US 2022/0189417 A1Published application
Source Driver Integrated Circuit and Display Driving Device
AssigneeLx Semicon Co., Ltd.
InventorsSeung Hwan Ji, Ho Sung Hong, Ye Ji Lee, Jung Bae Yun
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Abstract
Provided a source driver integrated circuit (IC) and a display driving device eliminating an existing input pad and internal wiring of a source driver integrated circuit (IC) for receiving a sensing reference voltage from an external voltage source by allowing the sensing reference voltage for initializing pixels during sensing of the pixels to be generated by an internal voltage source, rather than the external voltage source.
Claims19
A source driver integrated circuit (IC) comprising:
- an internal ground GND;
- a first switch circuit including a first input terminal electrically connected to the internal ground GND and a first output terminal electrically connected to a sensing line of a display panel, configured to transfer, when turned on in a sensing mode, a sensing reference voltage supplied from the internal ground GND to the sensing line, and configured to be turned off in a display mode;
- a driving reference voltage input pad to which a driving reference voltage supplied from an external voltage source is input;
- a second switch circuit including a second input terminal electrically connected to the driving reference voltage input pad and a second output terminal electrically connected to the sensing line, configured to transfer, when turned on in the display mode, the driving reference voltage to the sensing line, and configured to be turned off in the sensing mode;
- and
- a sensing channel circuit electrically connected to the internal ground in the sensing mode and configured to receive an electrical characteristic of a pixel included in the display panel through the sensing line.
3 more elements
A display driving device comprising:
- a data driving circuit to supply a data voltage to a data line of a display panel in a display mode;
- and
- a pixel sensing circuit, comprising an internal ground, to electrically connect a sensing line of the display panel with the internal ground and to initialize a voltage of the sensing line to be a sensing reference voltage supplied from the internal ground in a sensing mode.
Dependencies are inferred from the claim text.