A foldable OLED display with an in-cell touch sensor having embedded metal-mesh electrodes

Abstract

A foldable organic light‐emitting diode display integrating a touch sensor is fabricated. The touch sensor has an in‐cell structure where metal‐mesh sensor electrodes are formed in a counter substrate. It is demonstrated that touch on the entire panel surface, including a bent portion, is detected and that the touch panel operates correctly after 100,000 folding operations with a radius of curvature of 5 mm.

Progress in organic semiconducting materials with high thermal stability for organic light‐emitting devices

“…[70][71][72][73][74][75][76][77][78][79][80][81][82][83] Very recently, OLED displays have been demonstrated to be durable upon bending in foldable smartphones in the very first attempts to commercialize foldable OLED displays. [84][85][86][87][88][89][90][91][92][93][94][95] However, when it comes to creating durable OLED displays with a large area (including televisions), further improvement is deemed necessary, both in terms of materials and device structures, to maintain uniform images within several million OLED pixels. [96][97][98][99][100][101][102][103][104][105] F I G U R E 1 A, Illustrations of a typical organic light-emitting device structure and, B, a flat energy band structure.…”

Sensor applications of thin‐film devices originating in display technologies

“…Moreover, it is required to equip sensor devices in FPDs to realize interactive displays . Conventionally, touch panels are equipped outside the FPDs . However, if the sensor devices can be made by thin‐film devices that have been already utilized for FPDs, they can be made without additional cost.…”

“…5,6 Conventionally, touch panels are equipped outside the FPDs. [7][8][9][10][11][12][13] However, if the sensor devices can be made by thin-film devices that have been already utilized for FPDs, they can be made without additional cost. Therefore, thin-film devices are again promising for sensor applications especially for interactive displays.…”

A robust projector–camera interactive display system based on finger touch control by fusing finger and its shadow

“…Touch panel displays are more convenient and popular than other input devices due to their instinctive input method as a human–machine interface. The entire display surface of most touch panel displays is covered with a matrix of touch sensors such as resistors or capacitors or embedded optical sensors . Nowadays, display screens are becoming larger and larger, which makes touch sensors requiring more sensor units.…”