98results about How to "Compensation drift" patented technology

The invention provides an optical switch and modulator which uses a closed loop optical resonator. The optical resonator is a dielectric cavity whose primary function is to store optical power. Various structures are possible, and a particularly advantageous one is a ring shaped cavity. The wavelength response at the output port of a ring resonator side coupled to two waveguides is determined by the details of the resonator, and the coupling between the resonator and the waveguides. By coupling to adjacent resonators, the modulator response can be improved over that of a single resonator. One such improvement is in modulator efficiency, which is defined as the ratio of the change in optical intensity at the output, to a change in absorption in the ring waveguides. Absorption is used for switching and modulation without incurring significant optical attenuation. Another improvement involves making the resonance insensitive to small deviations in wavelength or index change. The latter improves fabrication tolerances and compensates for possible drift of the signal wavelength. Collectively, the behavior of multiple coupled resonators yields higher order responses.

An organic light emitting display device includes a display unit having pixels located at crossing regions of scan, control, data and sensing lines. Scan, control line, and data drivers respectively supply scan, control, and data signals to the scan, control, and data lines. A switching unit selectively couples the data lines to output lines of the data driver, a reference voltage source, or a negative bias voltage source. A sensing unit senses degradation information of an organic light emitting diode in the pixels and threshold voltage of a driving transistor in the pixels through the sensing lines. A control block stores the sensed degradation information and threshold voltage information. A timing controller is configured to generate a second data by converting an externally inputted first data using the degradation information and the threshold voltage information, and supply the second data to the data driver.

Implantable medical device systems and methods for measuring a body parameter utilizing an implantable functional pressure sensor and a fixed reference sensor, wherein the reference sensor compensates for drift of all other components in the measurement system other than the functional sensor. The reference sensor provides a basis for comparison to determine if and to what extent the electronic components, for example, have drifted over time, and thus provides a basis for correcting functional measurements and improving long term measurement accuracy.

An electronic tampering detection system is applied to a blank which can be formed into a package through the use of closure tabs which are coated with an electrically conductive adhesive. An electronic chip or CPU is applied to the blank and electrically conductive traces are printed or otherwise formed on the blank to connect the CPU to a first pair of the closure tabs to form an electric circuit. Other traces on the blank connect the first pair of closure tabs to the other closure tabs to form an enlarged circuit. The CPU has procedure memory, data memory, a power source, a clock and communication means associated therewith. If a package is opened accidentally or intentionally before it should be opened by way of the closure tabs the electric circuit is broken and a time stamp from the CPU clock is stored in the data memory for later retrieval. The circuit can be formed as resistances in parallel and an analog to digital converter can be used to provide an appropriate signal to the CPU. The electric circuit can cover a large portion of the blank's surface to provide a signal in the event of unauthorized penetration of the formed package.

A method and apparatus for determining a fluid flow rate blood access having an upstream position and a downstream position using a dialysis system. The dialysis system includes a dialyzer having a semi permeable membrane delimiting a first chamber through which blood removed from said blood access passes, and a second chamber through which dialysis liquid passes. In addition, an arterial line and a venous line are connected to an inlet and an outlet of the first chamber, respectively.

A controller adapted to control the temperature of a heating elements with a wide range of positive temperature coefficient of resistance, including very low values, using a sensor in line with the heating element. The controller is able to take account of non-constant mains power supplies and variation in the element resistance over time.

A method for mutual adaptation of a delivery module and a metering module of an exhaust emissions control system that has an exhaust gas conduit and a control module, the delivery module having a reservoir that has a venting valve and contains a uric acid solution that is conveyed via a delivery pump to a pressure regulating valve; and in the metering module, an air stream being compressed with the aid of a pump, conveyed to a pressure accumulator, and conveyed via a regulating valve, together with the uric acid solution, out of the pressure regulating valve to a metering valve, and being conveyed from there to an atomizer unit disposed in the exhaust gas conduit, the value of a reference pressure based on the pressure forming in the exhaust gas conduit being stored in the control module. A method for mutual adaptation of a delivery module and a metering module of an exhaust emissions control system having a control module, a respective parameter or characteristic curve being created for the delivery module and for the metering module and being introduced into the respective module as a machine-readable code. An apparatus for mutual adaptation of a delivery module and metering module for an exhaust emissions control system having an exhaust gas conduit and a control module, the value of a reference pressure based on the pressure forming in the exhaust gas conduit in the context of a calibration cycle being stored in the control module. A mutual adaptation of any arbitrary metering and delivery modules can thereby be implemented in a simple and economical fashion.

A pixel circuit including a first transistor, a coupling capacitor, a second transistor, and a luminescent element is provided. The first transistor is used as a switch. The coupling capacitor stores a coupling voltage and transmits the coupling voltage to the gate of the second transistor for compensating a drift of the threshold voltage of the second transistor. The second transistor provides a driving current for driving the luminescent element to emit light.

A time-multiplexed waveform generator includes a wavelength splitter that receives an input optical signal and spectrally separates the input optical signal into a plurality of frequency components. A plurality of intensity modulators receives each of the frequency components and passes each of the frequency components for a selective time period, and then extinguishes that frequency for the remainder of a chirp time, the plurality of intensity modulators producing a plurality of first output signals. A plurality of adjustable delay lines is positioned after the intensity modulators and receives the first output signals. Each of the adjustable delay lines enables phase control of each of the frequency components associated with the first output signals for compensating any relative drifts of the path lengths and phase coherently stitching a plurality of sub-chirps together. The adjustable delay lines produce a plurality of second output signals. A wavelength combiner receives the second output signals and recombines the output signals to produce a stair-step waveform output signal.

A self-calibrating pressure sensor system may measure the pressure of a gas or liquid. The system may include a pressure sensor, a reference sensor, and a drift compensation system. The pressure sensor may include a pressure-sensing flexible diaphragm with one side exposed to the gas or liquid and another side forming a wall of a sealed chamber. The reference sensor may include a reference flexible diaphragm that has two sides that are both within or exposed to the same sealed chamber. The drift compensation system may produce information that is indicative of the pressure of the gas or liquid based on the signal from the pressure sensor, and compensate for drift in this signal based on changes in the signal from the reference sensor. The pressure-sensing flexible diaphragm and the reference flexible diaphragm may be made at substantially the same time by depositing or growing a single layer of material in a single continuous step.

The receiver comprises a first optical fibre input element (2) through which an information carrying element (S1) circulates, a local laser unit (3), an optical detection unit (4) and a differential demodulation unit (5). Characterised in that the information carrying signal (S1) of the input optical fibre (2) and the light beam (h1) generated by the local laser unit (3) are connected and detect in an optical detection block (4), which converts the information carrying signal (S1) into an electrical information carrying signal (S2) to be processed electrically in a demodulation unit (5) which performs a differential demodulation of the phase and quadrature components thereof, and subsequently combines same. The result in an optical receiver (1) with homodyne optical detection, the wavelengths of the input signal S1 and the synthonised light beam h1 coinciding, with high tolerance to the phase noise generated by optical communications lasers and not requiring use of an optical phase monitor (OPLL).

Apparatus for carrying out real-time PCR reactions, including a thermocycler having a reaction region with a plurality of temperature-regulable receptacles for reaction vessels, an illumination device, which has a plurality of light-emitting diodes and is assigned to the reaction region and by means of which excitation light can be radiated into the receptacles, a detector device, which generates measured values in a manner dependent on a measured light intensity, optical devices defining a beam path that leads from the illumination device to the receptacles and from there to the detector device, a reference device, which generates a reference measured value by measurement of the light intensity of a light-emitting diode, and an evaluation device, which takes into account the reference measured value with the measured values, wherein the reference device has a reference light-emitting diode, the light of which is coupled into the beam path behind the reaction region.

A method and apparatus for determining the appropriate timing interval for each bit or data symbol in serial data communications. A sending device transmits a predetermined bit sequence, such as a binary pattern corresponding to one byte, either on its own initiative or in response to an action of a receiving device. A microprocessor in the receiving device measures a calibration time interval between the leading edge of a start bit and a subsequent marker transition, either between subsequent data bits or between the final data bit and the stop bit. This measured interval may be mathematically converted to units useful to calibrate a function or device that conducts input/output operations. Optionally, the process may be repeated periodically to compensate for clock rate drift. This invention may be used for autobaud data rate detection, or matching the actual data rate of a remote serial device, and permits accurate communications without precision timing references.

When it has become necessary to reset color adjusting ID for the printer 20 because of the replacement of component parts or other causes, even in an environment where the printing condition that had been adopted for setting the ID in the past cannot be recreated, it is easy to calculate the ID of the equivalent value as those that would have been calculated if the printing condition that had been adopted for setting the ID in the past can be made available by using the color component conversion function. As a result, it will be no longer necessary to maintain materials and equipment in a good and unified state in the production site of products or at places where after-sales services are rendered.

A boat manoeuvring joystick, system and method for manoeuvring a boat. The joystick has a base with sensors arranged for detecting a position of the manoeuvring stick. The manoeuvring stick comprises a first bidirectional control knob and a second bidirectional control knob, arranged movably relative each other. The joystick comprises first control sensors detecting a first position of the first bidirectional control knob and second control sensors detecting a second position of the stern control knob. The system comprises a manoeuvring control unit comprising a bow thruster output terminal and a propulsion output terminal. The manoeuvring control unit is arranged for receiving position, first and second control signals and calculating a bow thruster signal and a propulsion signal. A dual mode joystick is also shown.

The invention discloses a shift register circuit, an array substrate and a display device. The shift register circuit comprises an input sub-circuit and a signal output sub-circuit, wherein the inputsub-circuit comprises: a control module, an input module, a voltage dividing module. The control module is connected with an input signal end and a high level signal end, and the control module is configured to output a signal of the high level signal end to a voltage dividing node under the control of an input signal; the input end of the input module is connected to the voltage dividing node, the output end of the input module is connected to the signal output sub-circuit, and the input module is configured to output a signal of the voltage dividing node to the signal output sub-circuit under the control of the control module; and the voltage dividing module is connected to the control module and a low level signal end, and the resistance value of the voltage dividing module is negatively correlated with the temperature. The signal output sub-circuit is connected to the output end of the input module, and is configured to output a gate scan signal to the output signal end under the control of the input module. The shift register circuit can improve the threshold voltage drift of the thin film transistor and improve the display stability of the display device at different temperatures.

A method for compensating for drift in a main magnetic field of a superconducting magnet in a magnetic resonance imaging (MRI) system includes measuring a pressure in a cryostat of the superconducting magnet. Based on the pressure, a parameter of an element of the MRI system is adjusted to correct or compensate for a change in the main magnetic field.

Based on the pattern writing data input to an input unit 20, a control computer 19 divides a predetermined region on which writing is effected by an electron beam 54 into smaller regions each consisting of one or the same number of frames and determines the areal density of a pattern to be written on each smaller region. A drift compensation time interval determining unit 32 then determines the amount of change in pattern areal density between each two adjacent smaller regions, and groups the smaller regions in the predetermined region into region groups depending on whether or not the amount of change is greater than a predetermined value. A time profile for compensating for the drift of the electron beam 54 is then determined for each region group.