Abstract: An apparatus and method for providing image primitives, such as edge polarity, edge magnitude, edge orientation, and edge displacement, and derivatives thereof, for an object are described. The data are obtained substantially simultaneously and processed in parallel such that multiple objects can be distinguished from one another in real time.

Abstract: A large scale LED display has a number of display panels each having a cable and spacer support structure for a number of LED modules. Adjacent display panels are connected together by a number of seam links that snap onto one cable of one of the display panels and one cable of the adjacent display panel. The cables may include a number of seam link engagement members spaced along the length of the cable and onto which the seam links snap wherein each of the seam link engagement members locates an LED module on the support structure. The LED modules include top and bottom housing sections that snap together, wherein one of the housing sections includes a seat for an electrical connector. The seat locates the connector and a printed circuit assembly within the LED module.

Abstract: A large scale LED display has a cable and rigid link support structure for a number of LED modules. The cable and rigid link support structure is flexible but has sufficient structural integrity to prevent misalignment of the pixel modules. The LED modules are removable from the support structure individually and as a group so as to facilitate repair of the display. The LED modules are rugged so as to withstand harsh outdoor conditions and they provide sufficient luminescence for use in sunlight.

Abstract: A large scale LED display has a number of display panels each having a cable and spacer support structure for a number of LED modules. Adjacent display panels are connected together by a number of seam links that snap onto one cable of one of the display panels and one cable of the adjacent display panel. The cables may include a number of seam link engagement members spaced along the length of the cable and onto which the seam links snap wherein each of the seam link engagement members locates an LED module on the support structure. The LED modules include top and bottom housing sections that snap together, wherein one of the housing sections includes a seat for an electrical connector. The seat locates the connector and a printed circuit assembly within the LED module.

Abstract: A large scale LED display has a cable and rigid link support structure for a number of LED modules. The cable and rigid link support structure is flexible but has sufficient structural integrity to prevent misalignment of the pixel modules. The LED modules are removable from the support structure individually and as a group so as to facilitate repair of the display. The LED modules are rugged so as to withstand harsh outdoor conditions and they provide sufficient luminescence for use in sunlight.

Abstract: A large scale LED display has a number of display panels each having a cable and spacer support structure for a number of LED modules. Adjacent display panels are connected together by a number of seam links that snap onto one cable of one of the display panels and one cable of the adjacent display panel. The cables may include a number of seam link engagement members spaced along the length of the cable and onto which the seam links snap wherein each of the seam link engagement members locates an LED module on the support structure. The LED modules include top and bottom housing sections that snap together, wherein one of the housing sections includes a seat for an electrical connector. The seat locates the connector and a printed circuit assembly within the LED module.

Abstract: A large scale LED display has a cable and rigid link support structure for a number of LED modules. The cable and rigid link support structure is flexible but has sufficient structural integrity to prevent misalignment of the pixel modules. The LED modules are removable from the support structure individually and as a group so as to facilitate repair of the display. The LED modules are rugged so as to withstand harsh outdoor conditions and they provide sufficient luminescence for use in sunlight.

Abstract: An apparatus and method for providing image primitives, such as edge polarity, edge magnitude, edge orientation, and edge displacement, and derivatives thereof, for an object are described. The data are obtained substantially simultaneously and processed in parallel such that multiple objects can be distinguished from one another in real time.

Abstract: An apparatus and method for providing image primitives, such as edge polarity, edge magnitude, edge orientation, and edge displacement, and derivatives thereof, for an object are described. The data are obtained substantially simultaneously and processed in parallel such that multiple objects can be distinguished from one another in real time.

Abstract: A large scale LED display has a cable and rigid link support structure for a number of LED modules. The cable and rigid link support structure is flexible but has sufficient structural integrity to prevent misalignment of the pixel modules. The LED modules are removable from the support structure individually and as a group so as to facilitate repair of the display. The LED modules are rugged so as to withstand harsh outdoor conditions and they provide sufficient luminescence for use in sunlight.

Abstract: A large scale LED display has a cable and rigid link support structure for a number of LED modules. The cable and rigid link support structure is flexible but has sufficient structural integrity to prevent misalignment of the pixel modules. The LED modules are removable from the support structure individually and as a group so as to facilitate repair of the display. The LED modules are rugged so as to withstand harsh outdoor conditions and they provide sufficient luminescence for use in sunlight.

Abstract: The system contains a first MOS transistor having a first source element, a first drain element, and a first gate element. A first low voltage current source has two ends. The ends of the low voltage current source are connected to at least two of the first MOS transistor elements. At least one first Zener clamp is in parallel with the low voltage current source.

Abstract: The system contains a first MOS transistor having a first source element, a first drain element, and a first gate element. A first low voltage current source has two ends. The ends of the low voltage current source are connected to at least two of the first MOS transistor elements. At least one first Zener clamp is in parallel with the low voltage current source.

Abstract: A large scale LED display has a number of display panels each having a cable and spacer support structure for a number of LED modules. Adjacent display panels are connected together by a number of seam links that snap onto one cable of one of the display panels and one cable of the adjacent display panel. The cables may include a number of seam link engagement members spaced along the length of the cable and onto which the seam links snap wherein each of the seam link engagement members locates an LED module on the support structure. The LED modules include top and bottom housing sections that snap together, wherein one of the housing sections includes a seat for an electrical connector. The seat locates the connector and a printed circuit assembly within the LED module.

Abstract: A large scale LED display has a cable and rigid link support structure for a number of LED modules. The cable and rigid link support structure is flexible but has sufficient structural integrity to prevent misalignment of the pixel modules. The LED modules are removable from the support structure individually and as a group so as to facilitate repair of the display. The LED modules are rugged so as to withstand harsh outdoor conditions and they provide sufficient luminescence for use in sunlight.

Abstract: A differential amplifier stage includes one active load circuit connected to a pair of cross-coupled transistors that produce a differential signal. The active load circuit controls the rise time of the differential signal. The differential amplifier stage also includes another active load circuit connected to the pair of cross-coupled transistors. The second active load circuit controls the fall time of the differential signal.

Abstract: A shifter circuit comprises a high and low voltage buffer stages and an output buffer stage. The high voltage buffer stage comprises multiple transistors arranged in a transistor stack having a plurality of intermediate nodes connecting individual transistors along the stack. The transistor stack is connected between a voltage level being shifted to and an input voltage. An inverter of this stage comprises multiple inputs and an output. Inverter inputs are connected to a respective intermediate node of the transistor stack. The low voltage buffer stage has an input connected to the input voltage and an output, and is operably connected to the high voltage buffer stage. The low voltage buffer stage is connected between a voltage level being shifted away from and a lower voltage. The output buffer stage is driven by the outputs of the high voltage buffer stage inverter and the low voltage buffer stage.

Abstract: A shifter circuit comprises, in one embodiment, an input voltage divider stage comprising multiple transistors arranged in a transistor stack defining a plurality of intermediate nodes. The transistor stack is connected between an input signal and ground and has at least one output. An inverting buffer stage is connected to a supply voltage and coupled to the input voltage divider's output. The inverting buffer stage is configured to provide an inverted output signal. Means are provided for stepping up the inverted output signal, receiving a stepped up output signal and providing a level-shifted output signal at a voltage level lower than that of the input signal.

Abstract: Shifter circuits comprise a matched translation stack comprising at least first and second stacks each of which comprising multiple transistors. The matched translation stack is configured to provide a primary logic level shift between a voltage level away from which a shift is desired (VddL) and a voltage level to which the shift is desired (VddH). One or more high voltage buffer stages are provided, at least one of which being connected with and biased by the matched translation stack. At least one high voltage buffer stage comprises multiple transistors arranged in a transistor stack that is biased by the first stack of the matched translation stack, and is connected to receive an input supplied by the second stack of the matched translation stack. The high voltage buffer stage also comprises an inverter that drives an output stage which is also driven by a low voltage buffer stage.

Abstract: Method and apparatus for controlling amplifier output offset using body biasing in MOS transistors. A pair of input transistors have isolated bodies. A differential input signal is applied across the gates of the input transistors. An output signal is derived from a voltage at the drain of one of the input transistors. A feedback loop includes an integrator and a feedback amplifier. The integrator integrates the output signal, thereby forming an integrated output signal. The integrated output signal is applied to a first input of the feedback amplifier, while a reference voltage is applied to a second input of the feedback amplifier. The feedback amplifier controls the voltage of the body of one of the input transistors. The body of the other input transistor is coupled to its source. The threshold voltage of the input transistor having its body coupled to the feedback amplifier is controlled such that a quiescent level of the output signal tends to equal the reference voltage.