Telegen Corporation

Nuelight Corporation

Display Research Laboratories, Inc.

W Edward Naugler

Jessica L Stevens

Duane A Haven

A method of controlling an array of pixels in an active matrix display to a predetermined emission level is provided. The pixels are arranged in a plurality of rows and a plurality of columns, each pixel having an active matrix element. The method makes use of a plurality of sensors each having a measurable sensor parameter and at least one pixel driver. Light emission is varied from a plurality of pixels in a first row using the pixel driver and the active matrix elements in the pixels. Light emission is received from the pixels at the sensors and a measured value of the measurable sensor parameter is obtained responsive to the received light emission. For each of the plurality of pixels, a control signal is generated for the pixel to maintain constant emission from the light source at the predetermined emission level.

Method and apparatus for controlling an active matrix display

A field emission display which includes thin film resistors disposed between the electron-emitting elements of a cathode and a conductive support which provides electrical connection to said electron-emitting element through said thin film.

Field emission display with transparent cathode

A flat-panel, matrix-type visible light emissive display which has an electron source positioned at the back panel for providing a background of electrons. An electron gating grid having a number of conductive filaments is positioned before the front panel and exposed to the electron source. A display array with a number of parallel conductive phosphor stripes for generating visible radiation when bombarded with electrons is arranged between the electron gating grid and the front panel. The display has a control unit for applying an accelerating voltage V.sub.3 to the conductive phosphor stripes, and an arrangement for selectively applying a blocking voltage V.sub.2 and a gating voltage V.sub.1 to the conductive filaments, such that gating voltage V.sub.1 is simultaneously applied to an adjacent filament pair to pass the electrons in-between the adjacent filament pair, such that the electrons which pass are accelerated to impact and produce visible radiation on a segment of the active stripe corresponding to the projection on the active stripe of the gating distance d between said conductive filaments.

Flat-panel matrix-type light emissive display

A deflecting apparatus for a flat-panel display having an evacuated display housing and a display screen. The display has phosphor stripes or dots for generating visible radiation when bombarded with electrons when accelerating voltage V.sub.1 is applied to stripes. The invention provides for an elongate electron source positioned in the back of the evacuated display housing for emitting electrons which are guided to the display screen through an anode grid or an electron gating grid located before the display screen. The deflecting apparatus for rendering the beam of electrons emitted from the elongate electron source uniform has a deflecting element or unit which is positioned at the back of the display housing and produces a spatially parabolic potential under the influence of steering potential V.sub.4. This spatially parabolic potential forces the electrons moving in the direction of the anode grid or gating grid to form a uniform beam. The deflecting apparatus of the invention can also be used to focus electrons to a narrow beam forming a 'knife edge'.

Growing community of inventors

Menlo Park, CA, United States of America

W Edward Naugler