A Fully Differential Direct Sampling Touch Screen Readout With a Touch Vector Calibration for Ultrathin Organic Light-Emitting Diode Display

This article presents a touch screen panel (TSP) readout IC (ROIC) for an ultrathin organic light-emitting diode (OLED) display, where display noise injection is severely increased. We adopted a fully differential (FD) and direct sampling receiver (RX) structure that supports digital in-phase and qu...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2024-09, Vol.71 (9), p.11602-11611
Main Authors: Seong, Siheon, Lee, Sewon, Bae, Sunghyun, Lee, Minjae
Format: Article
Language:English
Subjects:
Analog front-end (AFE)
Calibration
Capacitance
Demodulation
digital calibration
direct sampling receiver
display noise
Harmonic analysis
harmonics rejection
Integrated circuits
Intermodulation
Mixers
Noise tolerance
Organic light emitting diodes
Quadratures
Sampling
Sensitivity
Signal to noise ratio
signal-to-noise ratio (SNR)
touch screen panel (TSP)
Touch screens
Touch sensitive screens
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This article presents a touch screen panel (TSP) readout IC (ROIC) for an ultrathin organic light-emitting diode (OLED) display, where display noise injection is severely increased. We adopted a fully differential (FD) and direct sampling receiver (RX) structure that supports digital in-phase and quadrature (IQ) demodulation to improve tolerance over display noise harmonics intermodulation. Furthermore, we present a touch vector calibration technique that reduces the digital processing burden originating from processing FD touch signals. The proposed IC consists of two chips fabricated in 55 and 130 nm CMOS processes and then packaged into a single package. The signal-to-noise ratio (SNR) is 54.03 dB with a 240 Hz frame rate for the 6.1-inch 16 × 34 ultrathin OLED TSP, while consuming 65.65 mW.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2023.3333041