Matsushita Display Technology Co. has today announced a new LCD display which can actually capture the image of an object in front of the screen. The LTPS LCD ('Input Display') has QVGA resolution (320 x 240 x 3) and has an optical sensor in each pixel, this means that not only can it display an image but it can also capture one by scanning down the screen. At the moment this device is monochrome only and captures a 960 x 240 image (3 sub-pixels for each square pixel). Original story: EE Times.
LCD captures images by the pixel
By Yoshiko Hara
April 4, 2003 (10:04 a.m. EST)
TOKYO Toshiba Matsushita Display Technology Co., Ltd. has added an image capturing function to its low-temperature polysilicon liquid crystal displays.
A 3.5-inch diagonal LTPS LCD dubbed Input Display has an optical sensor for each pixel. The transmissive type color display with a QVGA (320x240 pixels) resolution, when placed on an object, scans an area of actual display size and captures it as a 960x240-pixel monochrome image.
The high mobility of LTPS liquid crystals allows pixel transistors to be small in size and the display has a higher aperture ratio compared to amorphous silicon TFT. These factors allow room for a sensor to be fabricated for each pixel, said a spokesman for the company.
Toshiba Matsushita Display expects the display with the image capturing function to open new consumer and business applications. The company expects the technology to be used in security applications such as fingerprint authentification.
The display will be exhibited at EDEX 2003, a display exhibition to be held in Tokyo next week (April 9-11).