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

A liquid-crystal-on-silicon microdisplay based on a 1024 x 768 two-dimensio nal pixel array fabricated in a digital 0.35-mum CMOS process displays imag es with a color depth of 8 bits per color, The pixel pitch is 12 mum and th e total chip area is 214 mm(2), Pixel brightness is controlled by modulatin g 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 transist or chip displays images at a maximum rate of 85 Hz and has a power dissipat ion of 200 mW from a single 3.3-V supply.