Abstract
Although corona discharge to a touchscreen display is not associated with the spark, it could cause soft and hard failures due to electromagnetic coupling to sensitive electronics beneath the glass. Experimental data were obtained to characterize these sparkless discharges and an equivalent circuit model was constructed to predict the resulting coupling to touchscreen electronics. Measurements and simulation indicate that a thinner glass and a higher touchscreen indium-tin-oxide (ITO) sense trace impedance both lead to higher ESD risk by delivering higher energy into the sensing IC. A CST co-simulation model is proposed and is shown to model the displacement current accurately. Charge movement and dissipation on the glass surface is represented using a disk with conductivity proportional to the reciprocal of radial distance. Dust figure measurements were used to study the effects of the glass type, glass thickness and voltage level on the corona discharge and the current coupled to the touchscreen patch on the display. These results can be used to drive full wave co-simulation models which try to anticipate the impact of sparkless discharges on the touchscreen electronics.
Original language | English |
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Title of host publication | 2023 IEEE Symposium on Electromagnetic Compatibility & Signal/Power Integrity (EMC+SIPI) |
Publisher | ACM/IEEE |
Pages | 510-515 |
Number of pages | 6 |
ISBN (Electronic) | 9798350309768 |
ISBN (Print) | 979-8-3503-0977-5 |
DOIs | |
Publication status | Published - 4 Aug 2023 |
Event | 2023 IEEE Symposium on Electromagnetic Compatibility & Signal/Power Integrity: EMC+SIPI 2023 - DeVos Place Convention Center, Grand Rapids, United States Duration: 31 Jul 2023 → 4 Aug 2023 https://emc2023.org/ |
Conference
Conference | 2023 IEEE Symposium on Electromagnetic Compatibility & Signal/Power Integrity |
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Abbreviated title | EMC+SIPI 2023 |
Country/Territory | United States |
City | Grand Rapids |
Period | 31/07/23 → 4/08/23 |
Internet address |
Keywords
- corona discharge
- ESD
- mobile electronics
- modeling
- touchscreen
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Computational Mathematics
- Safety, Risk, Reliability and Quality
- Signal Processing
- Instrumentation
- Radiation
- Electrical and Electronic Engineering