Exemplary embodiments provide an apparatus, system and method for power conversion to provide power to solid state lighting, and which may be coupled to a first switch, such as a dimmer switch. An exemplary system comprises: a switching power supply; solid state lighting; a first adaptive interface circuit to provide a resistive impedance to the first switch and conduct current from the first switch in a default mode; and a second adaptive interface circuit to create a resonant process. An exemplary apparatus comprises: a switching power supply; and an adaptive interface circuit comprising a resistive impedance coupled in series to a reactive impedance to conduct current from the first switch in a first current path in a default mode, and further comprising a second switch coupled to the reactive impedance to conduct current from the first switch in a second current path, with the adaptive interface circuit further damping oscillation when the first switch turns on.

Adaptive Current Regulation for Solid State Lighting

An embodiment of the present invention provides a method of driving a liquid crystal display device including a liquid crystal panel, and a backlight assembly providing light to the liquid crystal panel by a field sequential driving method, the method includes: displaying an image, at the liquid crystal panel and the backlight assembly, by time-dividing two frames into five sub-frames, wherein when images are displayed in the two frames, images of a first frame and a second frame of the two frames share one blue light.

Liquid crystal display device and driving method thereof

Exemplary embodiments provide an impedance matching circuit for providing variable power from a dimmer switch having a triac to a switching power supply couplable to solid-state lighting. An exemplary impedance matching circuit includes a first resistor coupled to receive a first current from the switching power supply; a second resistor; and a transistor coupled in series to the second resistor, with the transistor responsive to a gate voltage to modulate a second current through the second resistor in response to a detected level of the first current through the first resistor.

Impedance matching circuit for current regulation of solid state lighting

An apparatus and method for processing a captured image and, more particularly, for processing a captured image comprising a document. In one embodiment, an apparatus comprising a camera to capture documents is described. In another embodiment, a method for processing a captured image that includes a document comprises the steps of distinguishing an imaged document from its background, adjusting the captured image to reduce distortions created from use of a camera and properly orienting the document is described.

Model-based dewarping method and apparatus

A system is disclosed for driving a DC motor (15) under conditions of a controlled average current. An inductive element may be arranged for connection in series with the DC motor. A switch (14) is preferably coupled to the inductive element for connecting and disconnecting a terminal of the inductive element from the voltage source. A diode may be arranged for connection in parallel with a combination of the inductive element and the DC motor arranged in series, with appropriate polarity so that current circulating through the inductive element circulates through the diode when the switch disconnects the terminal from the voltage source. A capacitor is arranged for connection in parallel with the motor, for limiting a resulting voltage over the motor or for storing charge depending on the embodiment of the invention. A device for measuring a current through the motor is provided, and a device (13) for controlling operation of the switch dependent upon the measured current in the motor is also provided. An airflow apparatus is also disclosed.

System for operating dc motors and power converters

A digital camera system is provided for capturing pictures of scenery or scanning the text of a document. A lens of the digital camera system receives light from a scene, and a conversion device defines a first set of digital data based on this light. A scanning mechanism included within the digital camera system scans a document as the system is passed over the surface of the document and produces a second set of data that defines an image of the document. An audio signal interface included within the digital camera system receives an audio message and defines a third set of digital data based on the audio message. A system controller stores the first, second, and third sets of data into a storage device. If desired, the first and second sets of data may be merged together to define a combined image depicting at least a portion of the scene defined by the first set of digital data and depicting at least a portion of the document defined by the second set of digital data.

Digital camera system and method capable of performing document scans

An adjustable voltage controlled current source for supplying a constant current to a load may comprise a DC to DC switcher in a commonly known topology, including boost, buck, or boost/buck. The current from the DC to DC switcher is measured with one or more current sensing resistors or one or more inductively coupled current sensing windings such as a transformer or Hall-effect device. The current measurement is then coupled to the feedback input of the DC to DC switcher. The current measurement may have a DC bias added to meet the feedback voltage requirements of the DC to DC switcher. An external current set point may be combined with the current measurement to externally set the current output.

Adjustable voltage controlled DC to DC switcher current source

An improved liquid crystal display includes overlapped electrical conductors in a picture element (pixel) region of a liquid crystal material. The conductors are selectively defined so as to control the electric field applied to the liquid crystal material in a region associated with the liquid crystal material. By controlling the electric field in the region, the degree to which the molecules in the liquid crystal material rotate in response to the electric field can be controlled. In this manner, the contrast of the liquid crystal material in the region may be selectively controlled to, for example, improve the contrast of the liquid crystal display in multiple axes.

Liquid crystal display (LCD) having improved isocontrast performance and method for producing same

The system has a lens, and a converter (38) configured to receive light from the lens and to define a first set of digital data based on the light. A scanner is (68) configured to scan a document and to generate a second set of digital data defining an image of the document. A memory (29) device is provided and a system controller (55) is configured to store the sets of digital data in the memory device. An Independent claim is also included for a method for use with a digital camera.

Document scanning digital camera system has converter receiving light from lens and defining light data set, scanner for scanning document and generating image data set, memory and controller

PROBLEM TO BE SOLVED: To provide a digital camera system by which data, to generate an image of a text of a readable document when the text of the document is scanned and the data are given to a user, can be defined and to provide a method for executing the document scanning SOLUTION: This system 50 is provided with a lens, a converter 38 that receives light from the lens to be configured to define a 1st digital data set on the basis of the light, a scanning device 68 that is configured to scan a document and to generate a 2nd digital data set defining the image of this document, a storage device 29 and a system controller 55 that is configured to store the 1st digital data set and the 2nd digital data set to the storage device 29

Michael Andrews

Papers

Digital camera system and method capable of performing document scans

Adjustable voltage controlled DC to DC switcher current source

Liquid crystal display (LCD) having improved isocontrast performance and method for producing same

Document scanning digital camera system has converter receiving light from lens and defining light data set, scanner for scanning document and generating image data set, memory and controller

Digital camera system and how to use digital camera