Title :
8-bit/color 1024/spl times/768 microdisplay with analog in-pixel pulse width modulation and retinal averaging offset correction
Author :
Blalock, T.N. ; Gaddis, N.B. ; Nishimura, K.A. ; Knotts, T.A.
Author_Institution :
Agilent Labs., Palo Alto, CA, USA
Abstract :
A liquid-crystal-on-silicon microdisplay based on a 1024/spl times/768 2-D pixel array fabricated in a digital 0.35 /spl mu/m CMOS process displays images with a color depth of 8-bits/color. The pixel pitch is 22 /spl mu/m and the total chip area is 214 mm/sup 2/. Pixel brightness is controlled by modulating the pulse width of the pixel voltage drive signal with an in-pixel analog pulse width 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 :
Brightness; CMOS integrated circuits; Color displays; Comparators (circuits); Liquid crystal displays; Pulse width modulation; 0.35 micron; 1024 pixel; 12 micron; 200 mW; 2D pixel array; 3.3 V; 768 pixel; 8 bit; 85 Hz; CMOS process; Si; analog in-pixel pulse width modulation; color depth; comparator offset; liquid-crystal-on-silicon microdisplay; pixel brightness; pixel pitch; pixel voltage drive signal; power dissipation; retinal averaging offset correction; spatio-temporal averaging; total chip area; Brightness; CMOS process; Color; Liquid crystal displays; Microdisplays; Optical pulses; Pixel; Pulse circuits; Pulse width modulation; Space vector pulse width modulation;
Conference_Titel :
VLSI Circuits, 2000. Digest of Technical Papers. 2000 Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-6309-4
DOI :
10.1109/VLSIC.2000.852840
