Texas Instruments Corporation

Hanna E Witzgall

Rustin W Allred

Stephen R Handley

A display system for creating a full-color projected image. Light from a white light source passes through a color modulator (). The color modulator () is a stack of at least two dielectric layers exposed to an electric field. The applied electric field operates to change the index of refraction of the dielectric material enough to cause the stack of dielectric layers to selectively reflect or transmit various wavelength bands. By changing the electric field, the color modulator () provides a series of three primary color light beams that are modulated by a spatial light modulator (). A controller () controls the operation of the spatial light modulator () to form an image bearing beam of primary colored light. The image bearing beam of light is focused onto an image plane by a projection optics ().

Electro-optical, tunable, broadband color modulator

A digital graphic equalizer uses a predetermined number of equalizing bands each having a different center frequency, and the center frequencies span a predetermined audio bandwidth. For each equalizing band a minimum set of filters is provided. The filters have a predetermined linear uniform spacing between the gain of successive filters.

Growing community of inventors

Arlington, VA, United States of America

Hanna E Witzgall