X6d Limited

Tektronix, Inc.

David W Allen

Boyd MacNaughton

Rodney W Kimmell

Jure Bezgovsek

Ding Hua Long

Marshall Bond Borchert

Jure Repe

A viewing system for viewing video displays having the appearance of a three dimensional image.

3D shutter glasses for use with LCD displays

3D glasses

System for controlling the operation of a pair of 3D glasses having left and right liquid crystal viewing shutters

A stereoscopic imaging system (10) includes a display (14) and stereoscopic glasses (18) having right-and left-eye pieces (20 and 22). A photodetector (28) in the glasses receives electromagnetic radiation including IR pulses, having fast rise times, from a transmitter (26), and noise from ambient light and other electromagnetic radiation. An ambient light filter (34) filters out low frequency and low amplitude noise created by ambient light and other electromagnetic signals. The ambient light filter employs a high pass filter cancellation loop (42) that cancels low frequency components, a high frequency amplifier (50) that provides unity gain to low frequency components, and a high pass filter (C3 and R9). The ambient light filter also employs a threshold adjusting circuit (64) that temporarily adjusts the threshold voltage of a comparator (60) in response to reception of the IR pulses.

Ambient light filter for infrared linked stereoscopic glasses

An oscilloscope and a digital multimeter are combined in a single housing to provide a portable electronic measurement instrument wherein a substantial portion of circuitry is common to both measurement systems. A cathode-ray tube provides the display for both waveform and alpha-numeric information.

Electronic measuring instrument combining an oscilloscope and a digital

Growing community of inventors

Beaverton, OR, United States of America

David W Allen