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IBM Journal of Research and Development  
Volume 36, Number 1, Page 11 (1992)
Thin-film-transistor liquid crystal displa...
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A gray-scale addressing technique for thin-film-transistor/liquid crystal displays

by P. M. Alt, C. G. Powell, B. L. Owens,Jr., H. Ifill
An addressing technique allowing continuous-tone color images to be rendered on thin-film-transistor/liquid crystal displays having bilevel drivers is described. The technique uses multiple subfields per frame, with driver voltages changed synchronously with the field data. By using N bits of data per pixel, excitation is applied to the display one bit-plane per field for N consecutive fields. The technique is analyzed, its benefits and limitations discussed, and experimental results presented. Up to 16 gray levels have been demonstrated with good image quality.
Related Subjects: Color; Display technology