Toshiba Develops Display With Input Capability
The prototype is a 3.5" diagonal low-temperature polysilicon (LTPS) TFT LCD with a QVGA (320x240) resolution format.
In addition to the ability to display colour images, it includes a data input function that enables it to capture images such as photos or printed text. The input resolution at which the image is captured and re-displayed is up to 960x240 (for monochrome images). The input function is achieved through photo sensor devices embedded in the LCD.
TMD is pursuing LTPS as a core technology for future development of system on glass (SOG) displays. The companys first step in developing SOG capability using LTPS technology was to fabricate peripheral driver LSI circuitry directly onto the LCD. As a second step, TMD successfully provided LCD modules with built-in static random access memory (SRAM) and digital analogue converter (DAC) for the cellular phone market.
The input display is different from a camera, in that it inputs an actual-size image directly from the built-in image sensors. The technology could be used to capture data from a catalogue, read barcodes, recognise and authenticate fingerprints for security applications, or import a private route map into a PDA from a navigation system. TMD plans to further improve the software and resolution and to develop applications such as fingerprint recognition for e-commerce and financial transactions.
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