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

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 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.

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 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.