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| Number | Title | Issue Date |
| 8049156 | Method and apparatus for excess signal correction in an imager A method and apparatus for excess signal compensation in an imaging system is described. In one particular embodiment, the invention provides for non-linear background, offset (due to time dependent dark current) and/or lag (including constant, linear and non-linear... | 11/01/2011 |
| 7989754 | Optical circuit and method for measuring monitor characteristic An optical circuit includes a selector that supplies an output current from a first photodetector to a converter provided for a second photodetector, and a processor that imaginarily calculates the level of signal light output from an optical device, which is detect... | 08/02/2011 |
| 7928355 | Current subtraction pixel A pixel for detecting at least a portion of the electromagnetic spectrum may be provided. The pixel includes a detector element for detecting at least a portion of the electromagnetic spectrum, a bias point coupled to an output of the detector element for applying a... | 04/19/2011 |
| 7638752 | Method and apparatus for correcting excess signals in an imaging system A method and apparatus for excess signal compensation in an imaging system is described. In one particular embodiment, the invention provides for non-linear background, offset (due to time dependent dark current) and/or lag (including constant, linear and non-linear... | 12/29/2009 |
| 7439533 | Optical module and optical communication device An optical module includes a light emitting element, a connector part that supports one end of an optical fiber and optically couples the optical fiber to the light emitting element, and a monitoring light receiving element that has a characteristic to increase phot... | 10/21/2008 |
| 7439481 | In-situ power monitor having an extended range to stabilize gain of avalanche photodiodes across temperature variations Disclosed are an in-line monitoring apparatus with a temperature compensator, an optical receiver and a method for stabilizing gain of an avalanche photodiode (“APD”) over an extended range of input power values and across temperature variations. The apparatus c... | 10/21/2008 |
| 7423253 | Method and apparatus for correcting excess signals in an imaging system A method and apparatus for excess signal compensation in an imaging system is described. In one particular embodiment, the invention provides for non-linear background, offset (due to time dependent dark current) and/or lag (including constant, linear and non-linear... | 09/09/2008 |
| 7423522 | Tire pressure alert system A tire pressure alert system suitable for use in a vehicle includes a vehicular tire pressure monitoring system and a telematic system of the vehicle. The telematic system of the vehicle is operable to wirelessly communicate between the vehicle and an external servi... | 09/09/2008 |
| 7421213 | Optical receiver control device with a switchable bandwidth A control device with a switchable bandwidth including: an integrating element with a first capacitance, which is charged and discharged by at least one current; at least one second capacitance, which can be connected in parallel with the first capacitance via a fir... | 09/02/2008 |
| 7418213 | Transimpedance amplifier with integrated filtering and reduced parasitic capacitance A transimpedance amplifier (TIA) with integrated filtering. A capacitance is integrated into the TIA and connected to the power supply and to an internal ground of the TIA. Noise on the power supply of the transimpedance amplifier is filtered by the capacitor such t... | 08/26/2008 |
| 7406268 | Optical receiver circuit An optical receiver circuit is constructed to be immune to interference from external interference signals. The optical receiver circuit includes a differential amplifier having an optical reception device connected to one input of the differential amplifier. The op... | 07/29/2008 |
| 7381939 | Optical cargo detection A detector for detecting cargo in a container has a controller block, a transmitter for transmitting light into the field of view, a receiver for receiving reflected light, and a threshold comparator for determining whether the received light meets a threshold for c... | 06/03/2008 |
| 7355159 | Image scanner and method for detecting a defect in an image to be scanned Image data in an image scanner is examined to determine whether lines (light or dark) are present in the image data. By examining whether the lines are present in image data for multiple colors, and whether calibration gains for corresponding photosensors are normal... | 04/08/2008 |
| 7342443 | Operational amplifier An operational amplifier for canceling an offset and continuously generating an output signal. The operational amplifier includes a first operational amplification unit and a second operational amplification unit each having at least one electrical characteristic th... | 03/11/2008 |
| 7339152 | Delay circuit and test apparatus A delay circuit for delaying an input signal with a desired delay and outputting the delayed signal. The delay circuit includes a light emitting element for emitting light according to an input signal and outputting a delay signal, a bias current source for supplyin... | 03/04/2008 |
| 7332702 | Optical receiver and a method for manufacturing the same This invention provides an optical receiver, a temperature dependence of which is compensated, and a method for manufacturing the optical receiver. The optical receiver according to the present invention comprises an avalanche photodiode (APD), a voltage source for ... | 02/19/2008 |
| 7329850 | Vehicle rearview mirror system having a variable reflectance control A vehicle rearview mirror system includes an electro-optic reflective element, an ambient light sensor that is operable to sense ambient light, a glare light sensor that is operable to sense glare light and a circuit that is responsive to the ambient glare light sen... | 02/12/2008 |
| 7327458 | Spectral sensitivity composing system An output current from each pixel sensor can be extracted at an arbitrary ratio by a current divider. An arithmetic control unit sets the dividing ratio in correspondence to a color matching function. The current components are added together by a summing amplifier ... | 02/05/2008 |
| 7326921 | Optical receiver with bias voltage adjusted according to adjustable bypass current The present invention is to provide an optical receiver by which the avalanche photodiode (APD) can be protected from the self-breakdown when the signal light with excess power enters therein. The APD is biased by the DC/DC converter via the control circuit includin... | 02/05/2008 |
| 7326947 | Current transfer ratio temperature coefficient compensation method and apparatus An optocoupler system includes a buffer, isolation, and a detector. The system includes a current transfer ratio (CTR) with a temperature coefficient. The buffer includes a light source that generates light that passes through the isolation. A detector receives ligh... | 02/05/2008 |
| 7324130 | LED driver with integrated bias and dimming control storage A LED driver IC includes a control module(s) for controlling one or more LED drive parameters and non-volatile memory for storing settings data for that control module(s). The control module(s) is fully integrated into the LED driver IC and does not require any cont... | 01/29/2008 |
| 7320525 | Rear-view mirror for vehicles A rearview mirror reflects ambient light and dims when light from headlights of a following motor vehicle is detected. Electrochromic mirror glass is fixedly secured to a frame within an opening. A sensor is fixedly secured to a housing for sensing ambient light and... | 01/22/2008 |
| 7309852 | Variable noise control for an optical transducer In one embodiment, an optical transducer, such as an infrared transducer, generates an output signal that is representative of optical irradiance. A noise control circuit is coupled in a power supply path of the optical transducer. A switching circuit varies the noi... | 12/18/2007 |
| 7276684 | High gain photo cell with improved pulsed light operation A photocell system includes a current control circuit that provides an offset voltage. Each photocell in a photocell array includes an opto-electrical converter receives the offset voltage such that the opto-electrical converter establishes a DC operating point. In ... | 10/02/2007 |
| 7276682 | Laser power control with automatic compensation A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a default or target value from memory may be utilized to bias or otherwise control operation of an optic signal generator o... | 10/02/2007 |
| 7277127 | Imager flicker compensation systems and methods A method of capturing an image of a scene includes providing an imaging device having an array of pixels. Each pixel is configured to provide a pixel output. The method also includes determining a frequency of light produced by a light source illuminating the scene ... | 10/02/2007 |
| 7271802 | Dual panel display backlight power controller chip for handheld apparatus A backlight power controller chip comprises a control circuit connected to two switches to turn on and off two display panels of a dual panel display handheld apparatus. The controller chip individually switches the two switches to control the backlight sources of t... | 09/18/2007 |
| 7271380 | Color input scanner calibration system A photosensitive apparatus, such as scanner, includes a plurality of pixels, each pixel having associated therewith a set of photosensors, each photosensor filtered to record a primary color. The photosensors are exposed to light of each primary color separately, th... | 09/18/2007 |
| 7263875 | Multi-layer windshield moisture detector A moisture detection system includes a moisture detector having a first electrical conductor, a first substrate having the first electrical conductor disposed on one surface thereof, a spacing layer coupled to the other surface of the first substrate, a second subst... | 09/04/2007 |
| 7265334 | Laser power control with automatic compensation A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a target value from memory may be utilized to control one or more power levels of an optic signal. There may comprise 2 or ... | 09/04/2007 |
| 7260422 | Monolithic optical autocompensation read-out circuit for distance dependent loudness control in mobile phones A circuit and method are given, to realize a loudness control for mobile phone earpieces and speakers with the help of a proximity sensor, which is realized as an infrared photo-electric guard circuit, where only very few external parts are needed. As a novelty here... | 08/21/2007 |
| 7256378 | Output-compensating device for image sensor An output compensating device capable of optimally compensating output signals of an image sensor composed of a number of light-sensor circuits, each of which represents a unit pixel and is capable of producing in a photoelectric converting element a sensor current ... | 08/14/2007 |
| 7256383 | Optical sensor circuit, method of processing output signal of the same, and electronic apparatus An optical sensor circuit has a first optical sensor that outputs a signal according to the amount of received light on an opened light-receiving surface, a second optical sensor that is provided near the first optical sensor and outputs a signal according to the am... | 08/14/2007 |
| 7256384 | Signal-enhancement system for photodetector outputs A light scattering photometer signal-enhancement systems includes an adaptive sample and subtract circuit controlled by a computer or microcontroller (MCU). The MCU controls the gain of a programmable-gain amplifier (PGA) cascade that is used to amplify the raw phot... | 08/14/2007 |
| 7253391 | Optical sensor device and electronic apparatus In an optical sensor device employing an amorphous silicon photodiode, an external amplifier IC and the like are required due to low current capacity of the sensor element in order to improve the load driving capacity. It leads to increase in cost and mounting space... | 08/07/2007 |
| 7241984 | Imaging apparatus using saturation signal and photoelectric conversion signal to form image At least one exemplary embodiment is directed to an imaging apparatus which can include a plurality of pixel sections disposed in a two-dimensional pattern. Each pixel section can include a photoelectric conversion member, a semiconductor region holding a signal tra... | 07/10/2007 |
| 7235773 | Method and apparatus for image signal compensation of dark current, focal plane temperature, and electronics temperature A system and method for calibration and compensation of a visual sensor system. The visual sensor system includes dark pixels adjacent active pixels on a CCD imaging array, which provide dark current data corresponding to image response data. Concurrently, the tempe... | 06/26/2007 |
| 7223964 | Integration of electronic data storage into a telecommunications component A storage information system is disclosed for keeping archival information on the individual active optoelectronic components that are used in telecommunication equipment. The system involves enclosing a nonvolatile memory chip inside the hermetic package of the act... | 05/29/2007 |
| 7223957 | Sensor including circuitry for recovering time-varying information and removing DC offsets An amplification circuit for implementation in sensors such as photodetectors and other devices, and related method of amplification, are disclosed. In some embodiments, the amplification circuit includes a first amplifier that receives an input signal at least indi... | 05/29/2007 |
| 7214922 | Semiconductor photosensor device and information apparatus with sensitivity region for wide dynamic range A semiconductor photosensor device includes a plurality of photodiode sections, a switch, and an output section is provided. The plurality of photodiode sections have different illuminance-output characteristics. The switch selects any one of the plurality of photod... | 05/08/2007 |
