38.4: Invited Paper: In‐Cell Embedded Touch Screen Technology for Large Size LCD Applications

Abstract

Design guidelines for large size liquid crystal capacitive sensor panels have been studied. Based on a model taking both column spacer and glass deformation into account, reductions of column spacer density or elastic constant are found to be effective for improving cell gap sensitivity to touch force. The structure of a-Si IR sensor incorporating IR light source and IR passing filter has been proposed, and the issues of optical sensor method are confirmed to be solved by simulation and experiment results.

P‐139: A New Pixel Design for Touch and Display Driver Integration (TDDI)†

“…The offset voltage Vp Δ is show in Equation 1. [4][5] . The Vp Δ remains for longer on the DP side when gate signal scan from panel DPO side to DP side…”

Electromagnetic field analysis of capacitive touch panels

“…There have been considerable efforts of late to combine PCT panels and flat-panel displays, which is called the "oncell" [22,23] and "in-cell" structure [24][25][26][27][28], to simplify the structure of the touch panel. Research to solve issues [29][30][31][32][33][34][35][36] such as low signal-to-noise ratio and high cost, and to develop a 3D gesture and stylus input, is actively being pursued worldwide.…”

Al-Based Metal Mesh Electrodes for Advanced Touch Screen Panels Using Aluminum Nitride System Optical Absorption Layer

“…Projected capacitive type touch sensors are the current mainstream because they are highly precise and respond to multitouching (multipoint detecting). Recently, one glass solution (OGS), in-cell, and on-cell touch technologies using projected capacitive type touch sensors are also drawing increasing attention due to their ability to reduce the weight, thickness and cost of the touch devices [3]- [5].…”