68results about How to "Evenly compensated" patented technology

An eye-anterior-part observation system receives light reflected from an eye anterior part of the eye under measurement illuminated by an eye-anterior-part illumination light source. A movement-distance calculation section measures the displacement of the eye from an eye anterior image by the eye-anterior-part observation system. A wavefront compensation device compensates the wavefront of light reflected or transmitted. A wavefront-measurement section projects light on the eyeground, and receives light reflected from the eyeground through the wavefront compensation device. A calculation apparatus measures wavefront aberrations, based on the measured displacement of the eye and a light-receiving signal by the wavefront-measurement section. A wavefront-compensation-device control apparatus generates a control signal based on the wavefront aberration, and outputs to the wavefront compensation device to compensate the wavefront. A stage with a motor moves the wavefront compensation device in a direction transversing the optical axis of the reflected light, based on the displacement of the eye.

A data receiving device includes a reference clock signal transmitted through a differential conductor pair, estimating attenuation characteristics in the differential conductor pair serving as a transmission path of the reference clock signal, and compensating a transmission path attenuation of an NRZ signal based on the estimated attenuation characteristics. Because the reference clock repeats a transition between 0 and 1 at the same period as NRZ data period without fail, it is possible to estimate high frequency attenuation characteristics of a conductor by observing the amplitude of the reference clock at the receiving end. Characteristic control of a compensation filter is performed with respect to the NRZ signal to reproduce a proper transmission signal from a signal waveform that has been deteriorated by the attenuation caused in a long-distance transmission of high-speed digital data using the differential cable.

A pixel is provided including an OLED having anode and cathode electrodes. A second transistor controls current supplied from a first power supply to a second power supply via the OLED. A first transistor is coupled between a gate electrode of the second transistor and a data line and is configured to turn on when a scan signal is supplied to a scan line. A first capacitor is coupled between the first power supply and the gate electrode. A second capacitor is coupled between the anode electrode and the gate electrode. A fourth transistor is coupled between the second capacitor and the anode electrode and is configured to turn on when a control signal is supplied to a control line. A third transistor is coupled between the second transistor and the anode electrode and is configured to turn off when a signal is supplied to a light emitting control line.

The present invention is directed to high magnification compact zoom lenses that are reduced in diameter of groups of lens pieces closer to the imaging plane to provide downsized lightweight zoom lenses of magnification as high as 20 diameters, with an image stabilizer or vibration compensating mechanism being also reduced in dimensions. An exemplary improved high magnification zoom lens has four groups of lens pieces, namely, the first or leading lens group G1 of positive refractivity in the foremost position closer to the subject, the second lens group G2 of negative refractivity, the third lens group G3 of positive refractivity, and the fourth lens group G4 of positive refractivity in the rearmost position closer to the imaging plane, all arranged in this order. In displacing the entire lens optics of the zoom lens from the wide-angle end to the telephoto end, the second lens group G2 are moved toward the imaging plane and the fourth lens group G4 are moved to compensate for a varied position of the resultant image while the first and third lens groups, G1 and G3, have their respective positions fixed along the optical axis. The zoom lens satisfies the requirements as defined in the following formulae: f3 / f4>2.0 and v4>65 where f3 is a focal length of the third lens group G3, f4 is the focal length of the fourth lens group, v4 is an average of Abbe contrasts of all the convex lens pieces in the fourth lens group G4.

The predistorter may include: a predistortion filter predistorting an input signal to provide an output signal; a predistortion output estimation unit estimating the characteristics of a nonlinear device based on a signal processed by the nonlinear device and the output signal, and calculating a desired output signal of the predistortion filter by using the estimated characteristics of the nonlinear device; and an adaptive algorithm driving unit comparing the output signal with the desired output signal to output an error as a comparison result, calculating a filter coefficient according to which the calculated error is minimized, and providing the calculated filter coefficient to the predistortion filter in order to update a filter coefficient of the predistortion filter.

The invention provides a power transformer active noise control method based on convex combination adaptive filters so as to harmonize conflict between convergence speed and steady-state error in a power transformer active noise control algorithm. In the combination filters, one filter adopts a variable-step-size FxLms algorithm based on a versiera function to enable faster convergence speed and time-varying tracking performance to be obtained in the system operation early stage; and while the other filter adopts a fixed-small-step-size FxLms algorithm to ensure small steady-state error after system convergence, and meanwhile, to compensate the stabilization problem of the variable-step-size algorithm due to step change under the steady state. In combination coefficient selection, the modified versiera function is utilized to replace a conventionanl Sigmoid function, thereby preventing exponent operation, reducing system calculation complexity, and improving sensitiveness of combination coefficients to overall errors; the algorithm is allowed to have fast convergence performance, and meanwhile, can obtain smaller steady-state error; and compared with the conventional algorithm, the method has better overall performance.

The invention discloses a large-compensation-amount heating and ventilation pipeline construction method. A large-compensation-amount heating and ventilation pipeline comprises a large-compensation-amount pipeline compensator and heating and ventilation pipeline bodies arranged at the two ends of the pipeline compensator correspondingly, connecting discs are fixedly arranged at the two ends of the pipeline compensator, and flanges are fixedly arranged at the ends, close to the pipeline compensator, of the heating and ventilation pipeline bodies. According to the large-compensation-amount heating and ventilation pipeline construction method, the heating and ventilation pipeline bodies and the pipeline compensator can be conveniently, rapidly and stably installed and fixed, the situation that the connecting positions of the heating and ventilation pipeline bodies and the pipeline compensator are loosened and leak due to thread loosening in the follow-up process is prevented, and therefore normal use of the heating and ventilation pipeline bodies in the follow-up compensation process is guaranteed; and meanwhile, the compensation process can be very stable, the defect that the stability is poor in the using process due to the fact that the compensation action is too large in the past is overcome, the structure is simple, and operation and use by people are facilitated.

A method for compensating an automatic exposure of a camera in a mobile communication terminal. The method includes determining a presumptive error value based on an average luminance value of an input current image frame and a particular target luminance value, selecting a convergent coefficient value based on the determined presumptive error value, determining a weight value of an adaptive filter based on the determined convergent coefficient value, and determining an exposure value for a next image frame based on the selected weight value, the determined presumptive error value and the exposure value of the current image frame.