US Patent Application 18312889. TOUCH SCREEN SHIELD LAYER WITH RING AND TAPPING POINTS simplified abstract
Contents
TOUCH SCREEN SHIELD LAYER WITH RING AND TAPPING POINTS
Organization Name
Inventor(s)
Sagar R. Vaze of San Jose CA (US)
Yu-Heng Cheng of Campbell CA (US)
Prathit Bugnait of Hayward CA (US)
Isaac W. Chan of San Jose CA (US)
TOUCH SCREEN SHIELD LAYER WITH RING AND TAPPING POINTS - A simplified explanation of the abstract
This abstract first appeared for US patent application 18312889 titled 'TOUCH SCREEN SHIELD LAYER WITH RING AND TAPPING POINTS
Simplified Explanation
- The patent application discusses techniques to reduce noise in touch screens. - Differential driving and sensing methods are proposed to minimize noise. - Metal mesh can be used for touch electrodes and routing traces. - A display-noise shield or sensor can be placed between the display and touch screen to mitigate electrical interference. - The shield can minimize noise from the display to touch screen signals. - The sensor enables differential readout of touch screen signals, subtracting the measured noise component. - The touch screen and shield/sensor can be formed using an on-cell process for improved performance and yield. - The shield can be connected to a conductive ring and flex circuit via tapping points in a separate stackup from the display.
Original Abstract Submitted
Differential driving and/or sensing can reduce noise in a touch screen. In some examples, the touch electrodes and/or routing traces can be implemented using metal mesh in first and second metal layers. To mitigate electrical interference at the touch screen from a display, a display-noise shield or sensor can be provided between the display and the touch screen. In some examples, a shield can minimize a noise contribution from the display to signals generated at the touch screen. In other examples, a sensor can enable a differential read out of signals at the touch screen that subtracts a noise component measured by the sensor. Forming the shield or sensor, and the touch screen over the display using an on-cell process can improve touch screen performance and yield. The shield can be connected to a conductive ring and flex circuit via tapping points in a stackup separate from a display stackup.
