True color 1024×768 microdisplay with analog in-pixel pulsewidth modulation and retinal averaging offset correction

Author

Blalock, Travis N. ; Gaddis, Neela B. ; Nishimura, Ken A. ; Knotts, Thomas A.

Author_Institution

Agilent Labs., Palo Alto, CA, USA

Volume

36

Issue

5

fYear

2001

fDate

5/1/2001 12:00:00 AM

Firstpage

838

Lastpage

845

Abstract

A liquid-crystal-on-silicon microdisplay based on a 1024×768 two-dimensional pixel array fabricated in a digital 0.35-μm CMOS process displays images with a color depth of 8 bits per color. The pixel pitch is 12 μm and the total chip area is 214 mm². Pixel brightness is controlled by modulating the pulsewidth of the pixel voltage drive signal with an in-pixel analog pulsewidth modulation (PWM) circuit which utilizes human optic nerve spatio-temporal averaging to eliminate comparator offset. The 16 million transistor chip displays images at a maximum rate of 85 Hz and has a power dissipation of 200 mW from a single 3.3-V supply

Keywords

CMOS integrated circuits; colour displays; liquid crystal displays; pulse width modulation; 0.35 micron; 1024 pixel; 200 mW; 3.3 V; 768 pixel; 85 Hz; Si; analog in-pixel pulsewidth modulation circuit; brightness; color liquid-crystal-on-silicon microdisplay; digital CMOS process; retinal averaging offset correction; two-dimensional pixel array; CMOS process; Color; Liquid crystal displays; Microdisplays; Optical pulses; Pixel; Pulse circuits; Pulse width modulation; Space vector pulse width modulation; Two dimensional displays;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.918923

Filename

918923