46-1:<i>Invited Paper</i>: Touch and Display Integration with Force

Reynolds, Kurth; Shepelev, Petr; Graf, Andreas

doi:10.1002/sdtp.10763

Cited by 15 publications

(8 citation statements)

References 3 publications

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“…Recently, intensive work on displayintegrated force touch sensor to realize on-screen keyboard have been reported. In the past years, different kinds of sensing methods have been studied to develop high-performance force sensors as Capacitance [2,3,6], Piezoresistivity [5], Piezoelectricity [7]. The performance of the force sensor is required to be equal to or higher than that of a mechanical keyboard.…”

Section: Introductionmentioning

confidence: 99%

35‐1: Sharp Force Touch for On‐Screen User Interface in LCD and Foldable OLED Display Application

Yamamoto

Maruyama

Kida

et al. 2021

Symp Digest of Tech Papers

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We describe ultra‐high sensitive force sensor on flat display that can detect and differentiate between feather touch and press touch or tapping. The proposed unique sensor pattern design and pressure‐sensitive material enables ultra‐high force sensitivity, multi force detection (10 points). The force as low as 25g comparable to make force of keyboards can be detected. The proposed technology provides on‐screen keyboard with extremely good performance for dual screen products. Moreover, with integrated force function, we can realize adaptive input interface on display not only the keyboard but also drawing pads, control boards and musical instruments.

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Section: Introductionmentioning

confidence: 99%

35‐1: Sharp Force Touch for On‐Screen User Interface in LCD and Foldable OLED Display Application

Yamamoto

Maruyama

Kida

et al. 2021

Symp Digest of Tech Papers

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“…In this way the constraints of additional capacitive touch layers, connections, and routing can be removed. [3]…”

Section: Introductionmentioning

confidence: 99%

44‐2: In‐cell Touch Panel LCD Driving Method for EMI Mitigation for Automotive Application

Ito¹,

Hsu²,

Noto³

et al. 2021

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Automotive applications require suppressing EMI (Electro Magnetic Interference) noise in order to avoid interference with other electrical components, and the specification is much tighter than mobile applications. Currently, in‐cell touch LCDs are widely seen in the market especially in mobile phone applications, which are integrating touch panel function in the display due to the simple structure of in‐cell touch LCDs. However, in‐cell touch LCDs generally emit higher EMI noise than LCDs with discrete touch panels, since the LCD surface area cannot be covered by electrical shield layer with in‐cell touch architecture while it can be in a discrete touch panel. Therefore, EMI is a critical issue when using in‐cell touch LCDs for automotive applications. For this paper we introduce driving techniques for in‐cell touch LCD which mitigate EMI for automotive applications in order to pass the criteria of automotive application without deterioration of picture image quality.

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“…The piezoelectric force touch panel prototypes have been broadly demonstrated [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]; however, their successful use in commercialized products has not yet been reported. This is due to the issue of non-uniformity of the over-panel force‒voltage responsivity [ 8 , 9 ], which means that the same force strength will give rise to different voltage levels when the touch location varies.…”

Section: Introductionmentioning

confidence: 99%

High Three-Dimensional Detection Accuracy in Piezoelectric-Based Touch Panel in Interactive Displays by Optimized Artificial Neural Networks

Gao

Dai

Kitsos

et al. 2019

Sensors

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High detection accuracy in piezoelectric-based force sensing in interactive displays has gained global attention. To achieve this, artificial neural networks (ANN)—successful and widely used machine learning algorithms—have been demonstrated to be potentially powerful tools, providing acceptable location detection accuracy of 95.2% and force level recognition of 93.3% in a previous study. While these values might be acceptable for conventional operations, e.g., opening a folder, they must be boosted for applications where intensive operations are performed. Furthermore, the relatively high computational cost reported prevents the popularity of ANN-based techniques in conventional artificial intelligence (AI) chip-free end-terminals. In this article, an ANN is designed and optimized for piezoelectric-based touch panels in interactive displays for the first time. The presented technique experimentally allows a conventional smart device to work smoothly with a high detection accuracy of above 97% for both location and force level detection with a low computational cost, thereby advancing the user experience, and serviced by piezoelectric-based touch interfaces in displays.

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46-1:Invited Paper: Touch and Display Integration with Force

Abstract: A mobile touch interface integrating capacitive sensing electrodes onto a TFT display with a single touch and display IC has been demonstrated. However, new user experiences such as force input can also be integrated into a production device without additional components.

Cited by 15 publications

References 3 publications

35‐1: Sharp Force Touch for On‐Screen User Interface in LCD and Foldable OLED Display Application

35‐1: Sharp Force Touch for On‐Screen User Interface in LCD and Foldable OLED Display Application

44‐2: In‐cell Touch Panel LCD Driving Method for EMI Mitigation for Automotive Application

High Three-Dimensional Detection Accuracy in Piezoelectric-Based Touch Panel in Interactive Displays by Optimized Artificial Neural Networks

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