42results about How to "Simple compensation process" patented technology

A sensing system including a sensor having an enclosure that defines a chamber, a fiber optic segment extending from outside the enclosure into the chamber, and a sequence of optical processing elements within the chamber. The elements include a fiber Bragg grating, a polarizer, a side hole fiber, and a mirror. A light source is arranged to direct light to the sensor(s). A spectral analyzer is arranged to detect light reflected back from the sensor(s). The fiber Bragg grating substantially reflects a first spectral envelope while transmitting the remainder of the optical spectrum to the polarizer and side hole fiber. The polarizer, side hole fiber, and mirror cooperate to return an optical signal within a second spectra! envelope. The characteristic wavelength of a peak in the first spectral envelope is highly sensitive to temperature and relatively weakly sensitive to pressure. The period of the optical signal within the second spectral envelope is highly sensitive to pressure and relatively weakly sensitive to temperature. The spectral analyzer measures these spectral components to simultaneously derive a measure of temperature and pressure that effectively compensates for temperature-pressure cross-sensitivity of the sensor(s).

The present disclosure discloses a method and a device for adjusting gray scale of a display panel, the method comprises: performing image acquisition on a display panel, and obtaining a current image; identifying an nonuniform block in the current image, and detecting an original output brightness and an original input gray scale of the nonuniform block; determining a target input gray scale corresponding to a preset target brightness according to an actual Gamma curve value, the actual Gamma curve value is obtained through testing the display panel; using a difference value between the original input gray scale and the target input gray scale as a gray scale compensation value of the nonuniform block.

The invention discloses a gray scale compensation method and device and display equipment. The gray scale compensation method comprises the steps of obtaining a basic gray scale of each compensation unit; obtaining the equivalent lighting duration of each compensation unit, wherein the equivalent lighting duration is the lighting duration of the compensation unit at a preset gray scale, which is obtained by converting the actual lighting duration of the compensation unit; when it is judged that the equivalent time reaches any preset time point, according to the preset time point and the basicgray scale, a table is looked up to obtain gray scale compensation parameters corresponding to the compensation unit, and according to the gray scale compensation parameters and the basic gray scale,gray scale compensation is performed on sub-pixels in the compensation unit. According to the technical scheme provided by the embodiment of the invention, the compensation precision is relatively high, an over-compensation phenomenon does not occur, the over-compensation problem does not need to be solved after gray scale compensation operation, and the gray scale compensation process is simplified.

The invention discloses a temperature compensate crystal oscillator based on an analog circuit. The temperature compensate crystal oscillator adopts the closed-loop feedback compensation architecture, an output signal is divided into two paths, wherein one path is input into a frequency-voltage conversion circuit; a voltage signal corresponding to the current temperature point is obtained according to the output frequency of a voltage-controlled crystal oscillator, the voltage signal is subtracted from the reference voltage through the voltage comparison circuit, and then amplified to obtain a compensate voltage signal; the compensate voltage signal is filtered through a filter, and then is fed back to a voltage-controlled voltage control end of the voltage-controlled crystal oscillator to perform the compensation, so that the voltage-controlled crystal oscillator outputs the signal with an expected frequency, wherein the expected frequency is the target frequency f0. The temperature compensate crystal oscillator directly converts the frequency related to the temperature in real time into the compensate voltage signal, which is in one-to-one corresponding mapping relation with the temperature related frequency to perform the temperature compensation without needing a temperature sensor. The method can overcome the temperature hysteresis problem caused by asynchronous wafer temperature change of the temperature sensor and the crystal resonator in the existing TCXO (temperature compensate crystal oscillator).

An optical compensation method for a display device including a pixel is provided. The method includes: providing test data having a first grayscale value to the display device; measuring a luminance of the pixel which emits light based on the test data; and calculating a compensation grayscale value based on a second target luminance and the measured luminance of the pixel. The second target luminance is lower than a first target luminance which is set based on the first grayscale value.

The present invention relates to a device for compensating a radio frequency distortion caused by a sample / hold operation of a digital / analog converter in an orthogonal frequency division multiplexing (OFDM) transmission system, and a method thereof. In a digital transmission system, an edge frequency signal of a transmission signal band is distorted by a sample / hold operation of a digital / analog converter such that a signal attenuation is generated at a frequency domain by a sync function having a zero point at a sample frequency of a transmission signal. In the present invention, the signal distortion may be compensated by multiplying a coefficient of an inverse sync function by a signal weight value at the frequency domain, and it may be compensated by using a single multiplier and a lookup table storing the coefficient of the inverse sync function.

The invention discloses a device and a method for compensating a composition error of a main shaft in real time. The device comprises a radial capacitance displacement sensor, an axial capacitance displacement sensor, a control computer, a two-degree of freedom sharp knife servo controller and a two-degree of freedom sharp knife servo unit, wherein the output end of the radial capacitance displacement sensor is connected with the first input end of the control computer; the output end of the axial capacitance displacement sensor is connected with the second input end of the control computer; the two-degree of freedom sharp knife servo controller is respectively connected with the control computer and the two-degree of freedom sharp knife servo unit; the two-degree of freedom sharp knife servo unit is connected with a processing cuter; the radial capacitance displacement sensor is arranged at one side of the processing cutter, and the axial line thereof is vertically intersected with the axial line of a work-piece; the axial capacitance displacement sensor is arranged on one end face of the work-piece, and the axial line thereof is vertical to the end face of the work-piece. The device and the method for compensating the composition error of the main shaft in real time can perform on-line and real-time measurement and compensation on the composition error simply, rapidly and comprehensively, and can be widely applied to the field of precision machine tool machining.

The invention provides a substrate electroplating method, the substrate includes a plurality of circuit board units, the method includes the following steps: providing a substrate, the substrate includes an insulating layer and a metal layer; forming a barrier layer on the metal layer, The barrier layer has a first opening and a second opening, the first opening corresponds to the area to be electroplated of the circuit board unit, the second opening corresponds to the compensation plating area; the second opening The window is arranged in the waste area of ​​the substrate; electroplating is performed on the substrate; wherein, the area distribution of the compensation electroplating area is adjusted according to the distribution of the current density of the substrate before compensation. The method of the invention has a simple compensation process, improves the uniformity of the electroplated metal in the area to be electroplated, the etching yield of the circuit board, and the controllability of manufacturing, and at the same time reduces energy consumption and saves costs.

Embodiments of the present invention disclose a pixel current compensation method and system for a display panel. The compensation method includes: testing the actual current value of a sub-pixel on the display panel at the i-th gray level; The current value is adjusted to the preset target current value of the ith grayscale of the subpixel, and the target grayscale value when the subpixel is at the target current value corresponding to the ith grayscale is recorded; The data distribution table of the target grayscale value at the current time is used to perform current compensation on at least one sub-pixel of the display panel to be compensated. In the present invention, any sub-pixel of the same type of mass-produced display panel can be compensated according to the obtained data distribution table, so that the current of the entire display panel is evenly distributed. Compared with the prior art, no dedicated compensation circuit needs to be added, and The compensation effect is good, the compensation process is simple, and it will not cause new uneven display due to uneven current distribution when working for a long time.

The present invention simplifies the processing for compensating an influence for a controlled quantity generated from shaping interference in motion control. A controller (10) as a model predictive control device computes an error between an actually measured value of a controlled quantity in a certain action cycle when shaping interfering is applied and a predictive value of the controlled quantity in the certain action cycle, i.e., the model predictive error, and corrects the predictive value in the action cycle after the certain action cycle by using the computed model predictive error.

The invention discloses a grayscale compensation method and device, and a display device. The gray scale compensation method includes obtaining the basic gray scale of each compensation unit; obtaining the equivalent lighting time of each compensation unit, the equivalent lighting time being the compensation unit obtained by converting the actual lighting time of the compensation unit to the preset gray When the equivalent duration reaches any preset time point, according to the preset time point and the basic gray scale, look up the table to obtain the gray scale compensation parameters corresponding to the compensation unit. According to the gray scale compensation parameters and the basic gray scale , performing gray scale compensation on the sub-pixels in the compensation unit. The technical solution provided by the embodiment of the present invention has high compensation accuracy and no overcompensation phenomenon, and thus does not need to solve the overcompensation problem after the grayscale compensation operation, which is beneficial to simplify the grayscale compensation process.

The embodiment of the present invention provides a control method and apparatus to prevent coupling reactor's magnetic saturation, and a compensation method for simplifying the power frequency component in the conventional circulation. The method comprises: determining the voltage outputted by the inversion topology in connection with each winding of the coupling reactor; according to the voltage outputted by the inversion topology in connection with each winding of the coupling reactor, determining the difference in the flux linkage of the two windings of the coupling reactor; using the sum of the correction amount of the flux linkage determined by the inversion circuit before being connected to a power grid and the difference in the flux linkage as the target amount of power frequency compensation wherein the inversion circuit includes the coupling reactor and the inversion topology; and generating a driving signal in accordance with the target amount of the power frequency compensation to drive the two windings of the coupling reactor to be connected respectively with the switch devices in the inversion topology so that the target amount of power frequency compensation approaches zero.