26024 results about "Light intensity" patented technology

There are many, many inventions described herein. In one aspect, what is disclosed is a digital camera including a plurality of arrays of photo detectors, including a first array of photo detectors to sample an intensity of light of a first wavelength and a second array of photo detectors to sample an intensity of light of a second wavelength. The digital camera further may also include a first lens disposed in an optical path of the first array of photo detectors, wherein the first lens includes a predetermined optical response to the light of the first wavelength, and a second lens disposed in with an optical path of the second array of photo detectors wherein the second lens includes a predetermined optical response to the light of the second wavelength. In addition, the digital camera may include signal processing circuitry, coupled to the first and second arrays of photo detectors, to generate a composite image using (i) data which is representative of the intensity of light sampled by the first array of photo detectors, and (ii) data which is representative of the intensity of light sampled by the second array of photo detectors; wherein the first array of photo detectors, the second array of photo detectors, and the signal processing circuitry are integrated on or in the same semiconductor substrate.

Assembly and method for measuring the concentration of an analyte in a biological matrix. The assembly includes an implantable optical-sensing element that comprises a body, and a membrane mounted on the body in a manner such that the membrane and the body define a cavity. The membrane is permeable to the analyte, but is impermeable to background species in the biological matrix. A refractive element is positioned in the cavity. A light source transmits light of a first intensity onto the refractive element, and a light detector receives light of a second intensity that is reflected from the cavity. A controller device optically coupled to the detector compares the first and second light intensities, and relates the intensities to analyte concentration.

A catheter for diagnosis or treatment of a vessel or organ is provided in which a flexible elongated body includes a tri-axial force sensor formed of a housing and a plurality of optical fibers associated with the housing that measure changes in the intensity of light reflected from the lateral surfaces of the housing resulting from deformation caused by forces applied to a distal extremity of the housing. A controller receives an output of the optical fibers and computes a multi-dimensional force vector corresponding to the contact force.

To provide a semiconductor device having a circuit with high operating performance and high reliability, and improve the reliability of the semiconductor device, thereby improving the reliability of an electronic device having the same. The aforementioned object is achieved by combining a step of crystallizing a semiconductor layer by irradiation with continuous wave laser beams or pulsed laser beams with a repetition rate of 10 MHz or more, while scanning in one direction; a step of photolithography with the use of a photomask or a leticle including an auxiliary pattern which is formed of a diffraction grating pattern or a semi-transmissive film having a function of reducing the light intensity; and a step of performing oxidation, nitridation, or surface-modification to the surface of the semiconductor film, an insulating film, or a conductive film, with high-density plasma with a low electron temperature.

A display device for modulating light intensity in response to programmed data output. Tapered cells within a base material containing a fluid within which are contained electrostatically responsive particles. Electrodes couple data signals to opposing portions of the cells, whereupon the position of the particles is modulated in response to the electric potential applied to said electrodes. A number of electronic ink displays, systems and method aspects are described.

A time-varying modulating signal is used as a plethysmography signal, rather than a time-varying detected optical power. The time-varying detected optical power is used (e.g., in a feedback loop) to adjust the source intensity. Light is transmitted from a light source, wherein an intensity of the transmitted light is based on a light control signal. A portion of the light transmitted from the light source is received at a light detector, the portion having an associated detected light intensity. A feedback signal is produced based the portion of light received at the light detector, the feedback signal indicative of the detected light intensity. The feedback signal is compared to a reference signal to produce a comparison signal. The light control signal is then adjusted based on the comparison signal, wherein at least one of the comparison signal and the light control signal is representative of volume changes in blood vessels.

A light emitting device includes several LEDs, mounted on a shared submount, and coupled to circuitry formed on the submount. The LEDs can be of the III-Nitride type. The architecture of the LEDs can be either inverted, or non-inverted. Inverted LEDs offer improved light generation. The LEDs may emit light of the same wavelength or different wavelengths. The circuitry can couple the LEDs in a combination of series and parallel, and can be switchable between various configurations. Other circuitry can include photosensitive devices for feedback and control of the intensity of the emitted light, or an oscillator, strobing the LEDs.

A light-based touch screen, including a housing for a display screen, a plurality of infra-red light emitting diodes (LEDs), fastened on the housing, for generating light beams, at least one LED selector, fastened on the housing and connected with the plurality of LEDs, for controllably selecting and deselecting one or more of the plurality of LEDs, a plurality of photodiode (PD) receivers, fastened on the housing, for measuring light intensity, at least one PD selector, fastened on the housing and connected with the plurality of PD receivers, for controllably selecting and deselecting one or more of the plurality of PD receivers, an optical assembly, fastened on the housing, for projecting light beams emitted by the plurality of LEDs in substantially parallel planes over the housing, and a controller, fastened on the housing and coupled with the plurality of PD receivers, (i) for controlling the at least one LED selector, (ii) for controlling the at least one PD selector, and (iii) for determining therefrom position and velocity of an object crossing at least one of the substantially parallel planes, based on output currents of the plurality of PD receivers.

A thin film electroluminescent (TFEL) phototherapy device based on high field electroluminescence (HFEL) or from organic light emitting devices (OLED), consistent with certain embodiments of the present invention has a battery and a charging circuit coupled to the battery, so that when connected to a source of current acts to charge the battery. A TFEL panel produces light when voltage from the power source (battery or AC source) is applied. A processor such as a microprocessor is used to control the application of voltage from the power source to the TFEL panel under control of a control program. A housing is used to contain the battery, the charging circuit and the processor and carry the TFEL panel on an outer surface thereof. In one embodiment, the housing incorporates a removable cover that uncovers a household electrical plug useful for supplying charging current to the charger. In use, a method of carrying out phototherapy, consistent with certain embodiments of the invention involves diagnosing a condition of an affected area of tissue that can be treated with phototherapy. A treatment protocol is determined including, for example, a treatment light intensity, a treatment time, a light modulation characteristic and a treatment light wavelength suitable for treating the condition. The affected area is then irradiated with light from the TFEL panel in accord with the treatment protocol.

To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x₁(17.5) and the color coordinate y₁(17.5) of the light emitted at a driving current density of 17.5 A/cm² and the color coordinate x₁(70) and the color coordinate y₁(70) of the light emitted at a driving current density of 70 A/cm² satisfy the following Expressions (D) and (E):

−0.006≦x₁(17.5)−x₁(70)≦0.006  (D),

−0.006≦y₁(70)−y₁(70)≦0.006  (E).

A method and apparatus are used for training adjustment in sports, particularly in running sports, in which light is radiated into the body tissue of a test person by at least one light source, the light intensity reflected in the body tissue is measured via at least one light sensor, a temporally oscillating measurement quantity is derived from the measured light intensity via an evaluator, a minima in the time curve of the measurement quantity are determined, and a performance rating from which the current metabolic state of the test person can be read out is generated via analysis of a plurality of temporally successive minima and displayed.

An LED lamp is provided in which the output light intensity of the LEDs in the LED lamp is adjusted based on the input voltage to the LED lamp. A dimmer control unit detects a type of dimmer switch during a configuration process. Using the detected dimmer type, the dimmer control unit generates control signals appropriate for the detected dimmer type to provide regulated current to the LEDs and to achieve the desired dimming effect. The LED lamp can be a direct replacement of conventional incandescent lamps in typical wiring configurations found in residential and commercial building lighting applications that use conventional dimmer switches.

An optical device consists of one or more optical waveguides and mechanical light switches 30. When a light switch 30 is turned on, it extracts light beam 62a from a waveguide core 20 and redirect the light beam 62b into free space, it redirects an incoming light beam 80 from free space and injects the light beam 80a into the waveguide core 20, or it performs both functions at the same time, depending on specific applications. On and off states of a light switch 30 are achieved by pulling the light switch 30 into a close vicinity of the waveguide core 20 and by pushing the light switch 30 away from the waveguide core 20, respectively. An interactive fiat-panel display can be built based on this invention. A plurality of parallel channel waveguides forms a display panel. An array of light beams 62a, injected from an array light source 60, propagates along waveguide cores 20 until reaches a location where a light switch 30 is turned on. At this location, the light switch 30 redirects the light beams towards a viewer. An image is produced when the light switches 30 are turned on sequentially while the light-intensity distribution on the array light source 60 is synchronically updated. The panel display is capable of responding to an input optical signal by detecting an incoming light beam 80 from a light pen 100. An array of photodetectors 81 is used to identify the location of the incoming light beam 80 on the display panel and a computer is used to execute a corresponding action accordingly.