Abstract
A design goal for foldable devices is the reliable activation of the inner display of the device with low latency. Traditional techniques to determine the open/fold state of foldable displays include measurements of magnetic fields at display edges and of the hinge angle. However, these techniques are susceptible to external magnetic fields and can have unacceptable latency. This disclosure describes techniques to reliably activate the inner display of foldable devices with low latency and power consumption by using a Hall sensor (and/or accelerometer) to trigger a touch integrated circuit (TIC) into performing a mutual scan (MS). The Hall sensor initially detects the opening or folding of the device. The MS confirms the open/fold state. The multi-sensor approach (Hall sensor and/or accelerometer and on-demand TIC scan) ensures accurate O/F state detection and can activate the inner display quickly with low power consumption for device state detection.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Chang, Hu-Chi; Li, Wendly; Qian, Chengliang; Oh, Youngseok; and Parekh, Premal, "Foldable Device Open/Fold State Detection Using Hall Sensor and Touch IC", Technical Disclosure Commons, (July 17, 2024)
https://www.tdcommons.org/dpubs_series/7206