In‐cell capacitive‐type touch sensor using LTPS TFT‐LCD technology

Nakamura, Takashi

doi:10.1889/jsid19.9.639

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…In-cell touch panels are promising application examples of the capacitance sensors. [57][58][59][60][61] An in-cell touch panel using capacitance sensors is shown in Figure 22. 58 An active-matrix capacitive sensor for use in LCDs as an incell touch panel has been developed.…”

Section: Capacitance Sensormentioning

confidence: 99%

Sensor applications of thin‐film devices originating in display technologies

Kimura

2019

J Soc Info Display

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Thin‐film devices are widely utilized for flat‐panel displays, and the essential advantages of the thin‐film devices are generally large‐area production, various‐material substrate, layered structure, etc. Appropriate applications are flat‐panel displays, and other applications where the abovementioned advantages are available and the disadvantages are acceptable are sensor applications. Moreover, if the sensor devices can be made by thin‐film devices that have been already utilized for flat‐panel displays, they can be made without additional cost. Therefore, thin‐film devices are again promising for sensor applications especially for interactive displays. We are investigating sensor applications of thin‐film devices. Particular in this journal paper, we review sensor applications of thin‐film devices originating in display technologies. The various sensors are visible‐light sensor, infrared‐light sensor, temperature sensor, magnetic‐field sensor, etc. Many research results from many research organizations as well as our research laboratory are introduced.

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Section: Capacitance Sensormentioning

confidence: 99%

Sensor applications of thin‐film devices originating in display technologies

Kimura

2019

J Soc Info Display

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“…Most of the TSPs already seen in the market are out‐cell type, and current development efforts focus on on‐cell and in‐cell types because of their thin and light LCD module. Table shows typical out‐cell, on‐cell, and in‐cell technologies and their features …”

Section: Introductionmentioning

confidence: 99%

An in‐cell capacitive touch sensor integrated in an LTPS WSVGA TFT‐LCD

Tomita¹,

Okada²,

Takahashi³

2012

J Soc Info Display

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This paper discusses an In‐cell capacitive touch sensor and its integration in an LTPS TFT‐LCD with 7‐inch screen size and WSVGA resolution. The operation of the newly developed sensor is based on capacitive coupling between user's finger and the detection electrode on the TFT substrate, and is purely capacitive. The sensors and the sensor driver circuits have been integrated in the TFT substrate of the prototype TFT‐LCD using LTPS technology. The prototype having 256x150 sensors shows advantages such as smooth operation with no touch force, high position accuracy, multi‐touch (10 or more), a thin and light LCD module, high display quality, and thus is suitable for various applications such as cell‐phones, smart‐phones, mobile‐PCs, and automotive‐use displays.

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“…The low-temperature polycrystalline-silicon (poly-Si) thin-film transistor (LTPS-TFT) process has been widely used in active liquid crystal displays (AMLCDs) and other photodevices [19], such as ambient light sensors [20,21], image scanners [22][23][24][25] and artificial retina [26,27]. This is because the LTPS-TFT device can be fabricated repetitively on a large-region substrate at lower costs than that on silicon-wafers.…”

Section: Introductionmentioning

confidence: 99%

A low-temperature polycrystalline-silicon thin-film transistor micro-manipulation array with indium tin oxide micro-coils and real-time detection

Chen¹,

Huang²,

Lin³

et al. 2009

J. Micromech. Microeng.

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This study proposes an array for a bio-handling system consisting of microcoils on top of photodetectors fabricated by low-temperature polycrystalline-silicon thin-film transistor (LTPS-TFT) technology on a glass substrate. Using magnetic beads as the medium, the proposed system can simultaneously monitor and manipulate micrometer-sized bio-samples. In a manipulation system based on magnetic force, photo-detecting is a reliable method, immune to the interference caused by electromagnetic fields. Under 480 lux ambient white light, the sensor can detect a microbead as small as 23 μm in diameter with detectable output difference. It provides a new, easier way for handling samples on a small chip.

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In‐cell capacitive‐type touch sensor using LTPS TFT‐LCD technology

Cited by 5 publications

References 14 publications

Sensor applications of thin‐film devices originating in display technologies

Sensor applications of thin‐film devices originating in display technologies

An in‐cell capacitive touch sensor integrated in an LTPS WSVGA TFT‐LCD

A low-temperature polycrystalline-silicon thin-film transistor micro-manipulation array with indium tin oxide micro-coils and real-time detection

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