Casio Announces 546 ppi Color TFT LCD

TOKYO – Casio Computer Co., Ltd., announced today that it has developed a 2.0-inch a-Si TFT (amorphous silicon thin-film transistor) color liquid crystal display with the industry’s highest resolution* of 546 ppi (pixels per inch).
* As at September 24, 2008, for direct-view-type TFT LCDs. Based on Casio survey.

In recent years, industry has been calling for ever higher resolution in display modules, based on the shift to high image quality that has come with the widespread adoption of the full HD (1920x1080 pixel) standard. The structure for each pixel in a TFT LCD is comprised of an aperture that serves as the light shutter, and multiple light intercepting parts which control the movement of the liquid crystals at the aperture. Accordingly, with conventional structures, if dot pitch was made any smaller there would not be enough space for the light aperture. This made it very difficult to realize any higher pixel density.

Casio’s newly developed LCD, however, is based on the company’s original HAST (hyper-amorphous silicon TFT) technology, which permits higher resolution and a higher aperture ratio. Combined with Casio’s optimal design and manufacturing processes, the result is the new 2.0-inch LCD boasting QHD (quarter high-definition) and enhanced resolution while maintaining the required light aperture.

Thanks to its high compatibility with the full HD standard, the new module will serve as a high quality TFT LCD with excellent display performance. It will be well suited to a variety of applications, including high quality still imagery and exceptionally clear video.

Read the full press release.