Title :
A Continuous-Grain Silicon-System LCD With Optical Input Function
Author :
Brown, Chris J. ; Kato, Hiromi ; Maeda, Kazuhiro ; Hadwen, B.
Author_Institution :
Sharp Corp., Nara
Abstract :
In this paper, we describe a continuous-grain silicon-system LCD with integrated optical input function for application in next-generation mobile devices. The optical input function, which may be used for touch input or fingerprint-recognition applications, is achieved by integrating image-sensor elements within each display pixel. By using a one-transistor (IT) active pixel sensor, we have successfully integrated a 30 Hz, 300 dpi VGA image sensor within an LCD panel with an aperture ratio of 40%. Power consumption and circuit area in the panel are minimized through the use of a source driver circuit which combines the functions of both display and sensor.
Keywords :
driver circuits; image sensors; liquid crystal displays; VGA image sensor; continuous-grain silicon-system LCD; image-sensor active pixel sensor; integrated optical input function; next-generation mobile devices; optical input function; power consumption; source driver circuit; Apertures; Circuits; Energy consumption; Fingerprint recognition; Image sensors; Integrated optics; Liquid crystal displays; Optical devices; Optical sensors; Pixel; CMOS APS; image sensors; liquid crystal displays (LCDs); thin-film transistors (TFTs);
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2007.908695
