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US 2024/0404440 A1Published application
Display device and inspection method thereof
AssigneeSamsung Display Co., Ltd.
InventorsTae Hyeon YANG, Jun Young KO, Han Su CHO, Tae Joon KIM, Jae Woo CHOI
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Abstract
A display device includes a touch panel and a display panel. The touch panel outputs touch sensing signals. At least one of a plurality of touch sensing signals is converted from a time domain to a frequency domain, and then information on a thickness of a common electrode is detected based on a peak of the converted touch sensing signal. As a result, it is possible to inspect whether the common electrode is formed with a uniform thickness without destroying the display device.
Claims5
A method for inspecting a display device comprising:
- inputting a touch driving signal to a first touch electrode of a touch panel adjacent to a display panel;
- receiving a touch sensing signal from a second touch electrode of the touch panel;
- converting the touch sensing signal from a time domain to a frequency domain;
- detecting at least one peak in a converted touch sensing signal;
- and
- determining a defect in the display panel based on the at least one peak.
3 more elements
Dependencies are inferred from the claim text.