L3 Technologies, Inc.

Other

L-3 Communications Corporation

Mark W Fletcher

Carlos Galleno

Michael Gregory Abernathy

Sanjay Tripathi

William Cumby

W W Donnelly, Jr

Ronald Christian

Stephen P Taylor

A fault-tolerant display system includes a dual thin film transistor (TFT) panel with pixel cells having two independently-controlled switching transistors; as such, primary source and gate drivers are operative to drive the display with first TFT transistors, while secondary source and gate drivers are operative to drive the display with second TFT transistors. As the display incorporates an additional TFT within the pixel cell which is driven independently, reliability is increased even at the pixel level. In this way, individual pixels of the LCD panel are driven simultaneously and independently by two pairs of source drivers and gate drivers, such that if one of the driver pairs fails due to some fault, the other driver pair can continue to drive the LCD panel without loss of information despite the failure of the first driver pair.

Fault-tolerant LCD display with dual transistor pixel cells

Fault-tolerant liquid crystal displays are delineated for avionics systems. At least some example embodiments are methods including providing an avionics display full screen on the LCD, the providing being implemented by driving source signal lines of the LCD by way of a first source driver circuit through a first set of FETs; driving gate signal lines of the LCD by way of a first gate driver circuit through a second set of FETs; preventing back biasing of a second source driver circuit by electrically isolating the source signal lines from the second source driver circuit; and preventing back biasing of a second gate driver circuit by electrically isolating the gate signal lines from the second gate driver circuit.

Fault-tolerant liquid crystal displays for avionics systems

Various circuits may benefit from suitable protection. For example, certain displays, such as active matrix liquid crystal displays, may benefit from enclosures configured to protect driver circuits from high intensity radiated fields. A system can include a first protective conductive coating layer. The system can also include a first insulating layer on the first protective conductive layer. The system can further include a signal conductive layer on the insulating layer. The system can additionally include a driver layer mounted to the signal conductive layer. The system can also include a second insulating layer above the driver layer. The system can further include a second protective conductive coating layer on the second insulating layer. The system can additionally include one or a plurality of conductive elements disposed between the first protective conductive coating layer and the second protective conductive coating layer to form an enclosure around the driver layer.

Chip on glass protection

A fault-tolerant display system includes a TFT panel, a first driver couplet including a first gate driver and a first source driver, and a second driver couplet including a second gate driver and a second source driver. The first gate driver and the second gate driver feed into the LCD panel from opposite directions and the first source driver and the second source driver feed into the LCD panel from opposite directions. The first driver couplet and the second driver couplet each have their own independent power supplies, independent from one another. In this way, individual pixels of the LCD panel are driven simultaneously by two pairs of source drivers and gate drivers, such that if one of the driver pairs fails due to some fault, the other driver pair can continue to drive the LCD panel without loss of information despite the failure of the one driver pair.

Fault-tolerant AMLCD display

A fault detection system is provided for a display system including an AMLCD. A video processor embeds encoded fault detection data within the digital video stream that is sent directly to the AMLCD. The fault detection data is embedded in such a manner that it is not displayed by the AMLCD. The fault detection data in the digital video stream received by the AMLCD is detected by the AMLCD and is then sent back to the video processor. The video processor compares what was sent with what is received to determine whether there is a difference which may be indicative of a fault in the AMLCD or the path of the digital video stream. As an additional check, the AMLCD may send timing error data to the video processor indicating whether the AMLCD is working properly. The video processor generates and outputs a fault flag to initiate a corrective action if a fault is detected in the AMLCD and/or the path of the digital video stream.

Fault detection for a display system

A folding cover for covering a trailer body, a truck body or other object. The folding cover includes a plurality of cover members which are foldably interconnected so as to be selectively movable between a covering position and a stowed position.

Folding cover

An adaptive, battery-operated sound actuate illumination device includes a housing of a durable material having an interior chamber and electronic components located within the chamber. The housing utilizes existing door lock hardware to secure the device to the door for unobtrusive, mechanical installation. The electrical components include a light emitting device positioned within the housing adjacent to an area to be illuminated, a sound receiving sensor adapted to respond to a noise by the user and energize the light emitting device, an optical sensor adapted to determine the existence of ambient light and thereby preclude the illumination of the light device when light is detected, an integrated circuit to receive the inputs of the microphone and optical sensor and to provide an output to energize the light emitting device, a time sensing electrical component adjacent to the input end of the integrated circuit to time out the activation of the light emitting diode after a predetermined period of time and a power source to power the microphone, optical sensor, timing circuit, and light emitting diode.

Growing community of inventors

Cumming, GA, United States of America

Mark W Fletcher