Abstract: An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes a light source for illuminating an imaging surface, thereby generating reflected images. The apparatus includes a motion transducer. A lens receives the reflected images and directs the reflected images onto the motion transducer. The motion transducer includes an electronic shutter for controlling the amount of time that light is collected for image frames. The motion transducer is configured to generate digital representations of the reflected images. The motion transducer is configured to generate movement data based on the digital representations of the reflected images. The movement data is indicative of relative motion between the imaging surface and the motion transducer. A controller coupled to the light source turns the light source on only during the time that light is being collected for an image frame.

Abstract: An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes a light source for illuminating an imaging surface, thereby generating reflected images. The apparatus includes a motion transducer. A lens receives the reflected images and directs the reflected images onto the motion transducer. The motion transducer includes an electronic shutter for controlling the amount of time that light is collected for image frames. The motion transducer is configured to generate digital representations of the reflected images. The motion transducer is configured to generate movement data based on the digital representations of the reflected images. The movement data is indicative of relative motion between the imaging surface and the motion transducer. A controller coupled to the light source turns the light source on only during the time that light is being collected for an image frame.

Abstract: An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes a light source for illuminating an imaging surface, thereby generating reflected images. The apparatus includes a motion transducer. A lens receives the reflected images and directs the reflected images onto the motion transducer. The motion transducer includes an electronic shutter for controlling the amount of time that light is collected for image frames. The motion transducer is configured to generate digital representations of the reflected images. The motion transducer is configured to generate movement data based on the digital representations of the reflected images. The movement data is indicative of relative motion between the imaging surface and the motion transducer. A controller coupled to the light source turns the light source on only during the time that light is being collected for an image frame.

Abstract: An electronic instrument with a housing in the form of a rectangular body. The housing has a front panel with a display screen, and opposed side panels extending perpendicularly from the front panel to a rear panel. The housing defines a cavity adjacent to the rear panel and at least one of the side panels. The cavity includes a recessed panel portion having attached electronic connectors, so that cables connected to the connectors can flex to avoid protruding from the side panel to facilitate rack mounting, and may extend without protruding from the rear panel for bench usage. A circuit board to which the connectors and a microprocessor are connected may be oriented parallel to the rear panel, allowing a limited front-to-rear depth for the housing.

Abstract: An improved method and apparatus for controlling the shutter open time in an opto-electronic device is presented. A frame of pixel intensity data is collected and the average pixel intensity value is across said frame is calculated and compared to a first threshold. If the average pixel intensity is outside a first intensity range defined by said first threshold, the shutter open time is adjusted in a first direction. Otherwise, the peak pixel intensity value across the frame is found and compared to a second threshold. If the peak pixel intensity value is outside a second intensity range defined by said second threshold, the shutter open time is adjusted in said first direction. If the peak pixel intensity value is not outside a second intensity range, the peak pixel intensity value is compared to a third threshold. If the peak pixel intensity value is outside a third intensity range defined by the third threshold, the shutter open time is adjusted in a second direction.

Abstract: A mouse for navigating upon grainy surfaces is equipped with at least two optical navigation circuits having different views of the work surface and whose axes may be non-parallel. For each navigation circuit an indication of navigation impairment owing to grain is detected. A suitable algorithm chooses from among the various navigation circuits which one's output to use. The multiple optical navigation circuits can each be separate self-contained mechanisms on separate dies or they can be separate sections of a single integrated circuit. The various metrics used within a navigation circuit for spatial filter selection can be further used by the navigation circuit selection algorithm. Each optical navigation circuit can have its own light source, or they can share a common one. They may also share any imaging optics, although each navigation sensor sees a different image.

Abstract: A printing device includes a navigation unit for monitoring a cooperative navigation surface and provides data to a navigation engine for processing and generation of a positional signal representative of the position of a moving printer head.

Abstract: A mouse for navigating upon grainy surfaces is equipped with at least two optical navigation circuits having different views of the work surface and whose axes may be non-parallel. For each navigation circuit an indication of navigation impairment owing to grain is detected. A suitable algorithm chooses from among the various navigation circuits which one's output to use. The multiple optical navigation circuits can each be separate self-contained mechanisms on separate dies or they can be separate sections of a single integrated circuit. The various metrics used within a navigation circuit for spatial filter selection can be further used by the navigation circuit selection algorithm. Each optical navigation circuit can have its own light source, or they can share a common one. They may also share any imaging optics, although each navigation sensor sees a different image.

Abstract: An electronic instrument with a housing in the form of a rectangular body. The housing has a front panel with a display screen, and opposed side panels extending perpendicularly from the front panel to a rear panel. The housing defines a cavity adjacent to the rear panel and at least one of the side panels. The cavity includes a recessed panel portion having attached electronic connectors, so that cables connected to the connectors can flex to avoid protruding from the side panel to facilitate rack mounting, and may extend without protruding from the rear panel for bench usage. A circuit board to which the connectors and a microprocessor are connected may be oriented parallel to the rear panel, allowing a limited front-to-rear depth for the housing.

Abstract: An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes a light source for illuminating an imaging surface, thereby generating reflected images. The apparatus includes a single chip for receiving the reflected images, generating digital representations of the reflected images, and generating a first set of movement data based on the digital representations of the reflected images. The first set of movement data is indicative of relative motion between the chip and the imaging surface. The single chip includes a serial interface for outputting motion data in a serial format based on the movement data.

Abstract: An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes a light source for illuminating an imaging surface, thereby generating reflected images. The apparatus includes a motion transducer. A lens receives the reflected images and directs the reflected images onto the motion transducer. The motion transducer includes an electronic shutter for controlling the amount of time that light is collected for image frames. The motion transducer is configured to generate digital representations of the reflected images. The motion transducer is configured to generate movement data based on the digital representations of the reflected images. The movement data is indicative of relative motion between the imaging surface and the motion transducer. A controller coupled to the light source turns the light source on only during the time that light is being collected for an image frame.

Abstract: An optical mouse integrated circuit includes an optical sensor, analog-to-digital (A/D) converter, a microprocessor, optional digital signal processor, and memory. The optical sensor generates surface data. The A/D converter receives and generates the digital data. The microprocessor, alone or in conjunction with the digital signal processor, receives the digital data. Memory is used for storage. The microprocessor includes customizable features for navigation operation and power savings.

Abstract: The architecture of the inventive correlator is, in a preferred embodiment, an array of correlation cells each containing a delay pipe, a math unit and an accumulator. An array of these correlation cells are tiled together to allow simultaneous processing by all cells. The array is disposed so that each cell accumulates an output value in a result surface. There is no electrical limit to the number of correlation cells that may be tiled together. A preferred embodiment uses nine cells tiled together into a 3×3 correlation result surface. Other embodiments have been tested in accordance with the present invention having twenty-five cells tiled together into a 5×5 correlation result surface. A stream of compare pixel values is presented to the array wherein each compare pixel value is presented to each cell concurrently. A reference memory supplies the appropriate reference pixel values to the cells to enable all calculations for that compare pixel value to be done concurrently.

Abstract: A system is described which allows buyers to define their preferences and sellers to define their capabilities, then determines which trading points maximize the utility of the buyer. The system suggests trades by exploiting the flexibilities and tradeoffs encoded by both parties, thus providing win-win trades. A second level of optimization ranks the trades with all suppliers, allowing the buyer to rapidly determine the best alternatives. The system allows for rich negotiation spaces and supports continuous, discrete, and range or interval decision factors.

Abstract: A free-standing head support frame for passively inducing cervical and thoracic flexion while maintaining traction includes a base support platform for placement on a stable treatment surface, an upright head support frame that projects transversely with respect to the base platform, a head cradle including a V-shaped occipital block with engagement edges extending transversely on opposite sides of the occipital center line, and an adjustable coupling for holding the head cradle at a desired elevation above the base platform. The patient assumes a static, semi-reclined position with the upper torso and head being elevated and inclined with respect to the support surface. The weight of the patient's upper torso induces a gentle stretch and traction in cervical and thoracic flexion, providing relief of cervical and upper thoracic muscle spasm, and facet joint, costovertebral joint and soft tissue conditions.

Abstract: An improved school bus door operator for a school bus, or other public transportation vehicle or bus. The improved school bus door operator of this invention consists of a linear actuated school bus door operator with a handle for operation by the driver and the linkage tying the operator to the school bus door. The linear actuated school bus door operator allows the driver of the school bus to open and close the school bus door with a back and forth short-stroke linear movement of the handle. This should reduce repetitive stress injuries which school bus drivers have occasioned. The improved school bus door operator generally consists of a handle slide mechanism, a rotatable pivot arm, and a door linkage arm engaged to the school bus door. The handle slide mechanism further consists of a slide arm that may be moved linearly within the handle slide mechanism. The slide arm has a handle that juts out generally in a vertical direction at a rearward portion of the slide arm.

Abstract: A CMOS digital integrated circuit (IC) chip on which an image is captured, digitized, and then processed on-chip in substantially the digital domain. A preferred embodiment comprises imaging circuitry including a photo cell array for capturing an image and generating a representative analog signal, conversion circuitry including an n-bit successive approximation register (SAR) analog-to-digital converter for converting the analog signal to a corresponding digital signal, filter circuitry including a spatial filter for edge and contrast enhancement of the corresponding image, compression circuitry for reducing the digital signal storage needs, correlation circuitry for processing the digital signal to generate result surface on which a minima resides representing a best fit image displacement between the captured image and previous images, interpolation circuitry for mapping the result surface into x- and y-coordinates, and an interface with a device using the chip, such as a hand-held scanner.

Abstract: A portable, free-standing head support frame for passively inducing cervical and thoracic flexion while maintaining traction includes a base support platform for placement on the floor or other stable treatment surface, an upright head support frame that projects transversely with respect to the base platform, a head cradle including a V-shaped occipital engagement block with engagement edges extending transversely on opposite sides of the occipital center line, a strap to immobilize the patient's head, and an adjustable coupling for holding the head cradle at a desired elevation above the base platform. The patient assumes a static, semi-reclined position with the patient's upper torso and head being elevated and inclined with respect to the support surface. The weight of the patient's upper torso induces a gentle stretch and traction in cervical and thoracic flexion, providing relief of cervical and upper thoracic muscle spasm, and facet joint, costovertebral joint and soft tissue conditions.

Abstract: The architecture of the inventive correlator is, in a preferred embodiment, an array of correlation cells each containing a delay pipe, a math unit and an accumulator. An array of these correlation cells are tiled together to allow simultaneous processing by all cells. The array is disposed so that each cell accumulates an output value in a result surface. There is no electrical limit to the number of correlation cells that may be tiled together. A preferred embodiment uses nine cells tiled together into a 3.times.3 correlation result surface. Other embodiments have been tested in accordance with the present invention having twenty-five cells tiled together into a 5.times.5 correlation result surface. A stream of compare pixel values is presented to the array wherein each compare pixel value is presented to each cell concurrently. A reference memory supplies the appropriate reference pixel values to the cells to enable all calculations for that compare pixel value to be done concurrently.