Massachusetts Institute of Technology

Other

Microdisplay Corporation

Phillip Alvelda

Thomas F Knight, Jr

Michael Bolotski

A method for operating a display having substrates and a plurality of capacitors formed at predetermined locations between the substrates includes measuring a capacitance for each of the plurality of capacitors, determining a cell gap for each of the plurality of capacitors in response to the capacitance for each of the plurality of capacitors, determining a cell gap relationship between the substrates in response to the cell gap for each of the plurality of capacitors and in response to the predetermined locations on the display, and determining a first intensity compensating value for a first pixel on an active region of the display in response to the cell gap relationship between the substrates and in response to a location of the first pixel on the display.

Substrate cell-gap compensation apparatus and method

The present invention provides a visual display including a high resolution miniature display compatible with VLSI technology and an optical system such as an optical magnifier used to enlarge the images display on the miniature display to be visible to the naked eye. The miniature display includes a VLSI backplane having an array of display elements monolithically formed with its driving circuit on a single crystalline semiconductor. Signal processing circuit or a microprocessor used to process image signals for the display may also be formed monolithically with the array and its driving circuit. The array may be designed using a silicon software compiler program to have randomly displaced elements or super-pixels for reducing image aliasing. The array may also be designed to have display elements positioned and scaled to compensate for the optical distortion introduced by the magnifier.

VLSI visual display

An apparatus for redirecting physical energy includes a substrate defining a first boundary of a region, a first electrode defining a second boundary of the region, the second boundary disposed opposite to the first boundary, a second electrode adjacent to the first boundary for cooperating with the first electrode to apply a non-uniform electric field to the region, the non-uniform electric field having electrical field intensities simultaneously including a first electric field intensity and a second electric field intensity, and a layer of material disposed in the region, the layer having a variable index of refraction responsive to the electric field intensities of the non-uniform electric field, the variable index of refraction including a first index of refraction in response to the first electric field intensity and a second index of refraction in response to the second electric field intensity.

Method and apparatus for forming optical gratings

A system having a display including display circuitry operating at a resonant frequency includes a tunable component, a resonant driver circuit coupled to the tunable component and to the display circuitry, for driving the display circuitry at an output frequency, a power consumption sensor coupled to the resonant driver circuit, for determining the power consumption of the resonant driver circuit, and a control logic coupled to the tunable component and to the power dissipation sensor, for monitoring the power consumption of the resonant driver circuit and for tuning the tunable component in response to the power consumption.

Resonant driver apparatus and method

A color microdisplay utilizes diffraction gratings to provide an array of high efficiency color pixels. The microdisplay includes a semiconductor substrate and source of light disposed adjacent thereto. A cover plate may be disposed above the substrate and has a layer of conductive material on a surface of the cover plate opposite the substrate. An optically active material, such as liquid crystal material, may be disposed between the substrate and the cover plate. An array of pixels are formed on the substrate. The pixel array includes an array of diffraction grating elements. Each element includes one or more diffraction gratings. The pitch of each diffraction grating can be a function of the angle of the incident light and the desired diffraction output spectrum. An optical system directs the diffracted light from each grating through the optically active material into viewing optics.

Growing community of inventors

Berkeley, CA, United States of America

Phillip Alvelda