Reflective LCD

A 5" screen using reflective display.

Toshiba Matsushita Display Technology (a joint venture formed between Toshiba and Matsushita) has developed and started mass production of a new monochrome LCD panel for use in electronic dictionaries and e-book readers.

Introduction

TMD has developed a TFT LCD that ensures high-contrast images by incorporating a high-resolution VGA display, with 16-level grayscale, and advanced optical performance. The newly developed TFT LCD adopts a new, highly efficient reflective surface and internal reflection technology to maximize such optical performance, providing clear and crisp images, and is able to display small, well-defined characters easily. In addition, the new product has completely eliminated the need for a backlight thanks to the highly reflective optical performance, and thus enables a low power system design, one of the essential requirements for electronic dictionaries and ensures longer battery-powered operation. Furthermore, the new product provides faster display image rewriting compared to other reflective type display technologies, thus enabling displays which are more easily legible even during fast scrolling of texts or during video clips in electronic dictionaries or books.

Specifications

• Display size: 5.01-inch
• Resolution: 640 x 480 (160 ppi)
• Display mode: Monochrome reflective display / Internal reflective display
• Contrast ratio: 12:1 (no backlight)
• Response time: 20 ms
• Levels of gray: 16
• Power consumption: 4mW (2-level grayscale), 20 mW (16-level grayscale)

Compared to the usual E Ink display, this panel has a higher contrast ratio (12:1 vs. 8:1) and also relatively low power consumption (20 mW vs. 1mW (E Ink standby) and 750 mW (E Ink active update)). Screen refresh is a lot faster (20 ms vs. 0.5-1s).

Use

• Dr. Yi - the M218(A,B)
• jetBook
• jetBook Lite

For more information

• http://www.tmdisplay.com/tm_dsp/en/index.html
• See also Boogie board