68results about How to "Evenly compensated" patented technology

The invention provides a display substrate driving device and method and a display device. The display substrate driving device comprises a feedback module and a processing module, wherein the feedback module is used for generating feedback voltage based on fluctuation amplitude of voltage of public electrode signals when the voltage of the public electrode signals in the display substrate fluctuates, the processing module is used for superposing the feedback voltage and the gamma reference voltage to generate a first gamma voltage, the first gamma voltage is used for generating and driving gray scale voltage of a pixel electrode of the display substrate, and the difference between the gray scale voltage and the fluctuated voltage of the public electrode signals meets the condition that luminance information displayed by pixels is kept constant. Accordingly, by adjusting the voltage of the pixel electrode, coupling fluctuation of the public electrode signals can be effectively and uniformly compensated and suppressed, image display quality of the display device is guaranteed, and the problem of heating of a compensation circuit can be effectively solved.

An organic light emitting display device and a driving method thereof that can stably compensate for a threshold voltage of a driving transistor. The organic light emitting display device includes pixels positioned at intersection portions (crossing regions) of scan lines and data lines, each pixel including the driving transistor having a gate electrode initialized to a voltage of an initialization power source before a data signal is supplied; power source lines coupled to the pixels in a column direction parallel with the data lines; and an initialization power source generator generating the initialization power source to the pixels via the power source lines. In the organic light emitting display device, the initialization power source generator controls the voltage of the initialization power source supplied to each pixel, corresponding to the gray scale of the data signal to be supplied to the pixel.

A data receiving device according to the present invention includes a reference clock signal that is transmitted through a differential conductor pair, an estimation means for estimating attenuation characteristics in the differential conductor pair serving as a transmission path of the reference clock signal, and a compensation means for compensating a transmission path attenuation of an NRZ signal based on the estimated attenuation characteristics. Since 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. Based on the estimation, characteristic control of a compensation filter is performed with respect to the NRZ signal. Thus, it is possible 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, and propagation skew due to positive and negative asymmetry of the differential pair.

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.

The invention discloses an automatic optical fiber transmission delay locking and equalization method applicable to optical fiber communication networks. Under the SDH (Synchronous Digital Hierarchy) system of conventional optical fiber transmission devices, by adding a zero-attenuation program-controllable optical fiber delay equalization network, in combination with an on-line optical fiber delay monitoring technique, the method reasonably chooses C mark and a time interval code Txk corresponding to C mark, a round trip comparison phase locking technique is utilized to separate out the change of an optical fiber delay value between a master station and a slave station in order to eliminate the adverse affection of the change of the optical fiber delay value on time and frequency synchronization, a three point-to-one point accurate measurement algorithm is adopted to constantly control the change of the optical fiber delay within an extremely narrow range, and thereby high-precision time and frequency synchronization is realized. The method provided by the invention is applied in combination with the on-line optical fiber delay monitoring technique, and can firmly control the delay change of optical fiber transmission within a range less than or equal to (1ns/day to 2ns/day to 5ns/day to 10ns/day).

A projection lens unit compensates for thermal expansion and contraction. The unit comprises a coupler at the front surface of a CRT, a lens unit body for projecting an image onto a screen by controlling and magnifying the light from the CRT, a plurality of legs secured to the coupler for supporting the lens unit body at more than three points, a slide mechanism (latch arms and latch engaging slots provided between the legs and the lens unit body for slidably supporting the legs for movement along the optical axis relative to the lens unit body, and expansion/contraction bars provided between the legs and the lens unit body for compensating for the thermally induced expansion/contraction, with one end engaged with a leg and the other end engaged with the base of the lens unit body.

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.

There are provided a pixel and an organic light emitting display device using the same capable of improving image quality. A pixel includes an organic light emitting diode, a first transistor, a second transistor and a second capacitor. The first transistor controls the amount of current supplied from a first power to the organic light emitting diode coupled to a second electrode of the first transistor, corresponding to a voltage applied to a second node. The second transistor is coupled between the second electrode of the first transistor and the second node so as to be turned on when a scan signal is supplied to a scan line. The second capacitor is coupled between the second electrode of the first transistor and a control line.

The invention relates to a production process for a high-precision bearing roller for rail transit. The production process comprises the following steps of step 1, cold heading: after drawing steel byutilizing a four-station high-speed cold header, upsetting the drawn steel into a roller blank; 2, heat treatment which is a full-automatic mesh belt furnace heat treatment flow production line; 3, hard grinding 1; 4, hard grinding 2; 5, ball base surface processing; 6, hard grinding 3; 7, superfinishing, in which 8 oilstones are adopted to perform vibration back and forth to process a raceway surface of a roller; 8, eddy current inspection, in which eddy current inspection equipment produced by German IBG is adopted and is installed on a superfinishing machine to realize unfolding of the roller so as to perform 100 percent eddy current inspection which is mainly used for detecting defects on the surface of the roller and cracks of internal tissues of the roller; and 9, packaging. The production process has the advantages that through four-station multi-formation, the forming precision of a product can be guaranteed, a metal flow direction of a material can tend to be reasonable at the same time, and the service life of the product is prolonged.

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 discloses a tunnel lighting device, system and method using sunlight. The device comprising a light guide, wherein the light guide is connected to a diffuser mounted in a tunnel through an optical fiber, the light guide is also internally provided with a first illumination sensor and a lamp, the first illumination sensor is used for collecting illumination intensity in the light guide, and the lamp is used for detecting the illumination intensity in the light guide; the lamp is used for adjusting the illumination intensity in the light guide device. When illumination intensity in the light guide device is insufficient, illumination intensity is compensated by utilizing the illumination intensity of the lamp, and compensated illumination intensity is conducted to the diffuser through the optical fiber, so the light beams received in the diffuser are preliminarily mixed in the light guide device; and furthermore, the light emitted by the diffuser has no obvious brightness difference, chromatic aberration or color temperature change, illumination compensation is smoother, and a purpose of stepless dimming is achieved.

The invention discloses a dispensing compensation system and compensation method based on glue flow detection. The dispensing compensation system comprises a glue receiving mechanism, a fixed seat, anoptical fiber sensor, an amplifier, a PC industrial personal computer, a driver and a dispensing execution motor. The fixed seat is arranged under a dispensing needle of dispensing equipment, the receiving mechanism is arranged on the middle upper portion of the fixed seat, the optical fiber sensor is arranged on the upper portion of the fixed seat and located over the receiving mechanism, the optical fiber sensor is connected with the amplifier through a connecting wire, the driver is connected with the dispensing execution motor through a connecting wire, and the dispensing execution motoris connected with a driving shaft of the dispensing equipment. The proportional value of dripping speed changes is automatically calculated according to different dripping speeds, the speed or air pressure of a dispensing control system is automatically adjusted in an equal proportion, the effect of stably compensating glue is achieved, the compensation technology is stable, the debugging efficiency and accuracy are improved, and good market application value is achieved.

The invention discloses a communication-in-motion antenna cosine scanning inertial navigation course correction method. A cosine scanning method is adopted to search a satellite signal; only rotation of an azimuth axis exists in the method and pitching motion can be omitted, so that control complexity can be lowered; in addition, when a becoming machine is not high in precision, a signal deviation curve is obtained by a circular cone scanning mode, and randomness occurs, so that the method is more suitable for communication-in-motion equipment with not high becoming machine precision, thereby further saving cost; through an AGC signal difference value, the antenna azimuth deviation can be compensated through a proportion control method; a mode adopting the AGC signal maximum value inverse solution navigation course for azimuth compensation is performed; and by adoption of the method, the linear relation between AGC signal cosine scanning left and right difference value and azimuth deviation angles and the optimal linear coefficient can be found, so that a complex calculation process can be omitted; and in addition, through proportional control, compensation can be more stable, and click disturbance can be lower.

A frequency monitor provides high resolution frequency monitoring over a range of input signal frequencies by measuring the time period of the signal to produce a raw frequency value and then filtering the raw frequency value with a low pass filter to remove an error component caused by quantization effects at high input signal frequencies. The system automatically accommodates changes in the input frequency eliminating a need for manual adjustment of the system based on anticipated measured frequencies.

The invention relates to an energy-saving type catalytic bed system with the controllable temperature. The energy-saving type catalytic system comprises a gas inlet heater, a catalytic bed and a heat exchanger. A gas inlet channel and a gas outlet channel are alternately formed between a furnace body inner surrounding plate and a furnace body outer surrounding plate. The inlet of the gas inlet channel is formed in an upper end plate, and the outlet of the gas inlet channel is formed between a lower end plate and the furnace body inner surrounding plate. The inlet of the gas outlet channel is formed between the upper end plate and the furnace body inner surrounding plate, and the outlet of the gas outlet channel is formed in the lower end plate. The heater is arranged in a furnace body corresponding to the outlet of the gas inlet channel. A gas outlet flow guide cover is arranged on the lower face of the middle of the lower end plate corresponding to the outlet of a gas outlet cover. A catalytic tail gas inlet, a catalytic tail gas outlet, a catalytic gas inlet, a catalytic gas outlet, a desorption gas supply inlet and a desorption gas supply outlet are formed in the heat exchanger. By the adoption of the energy-saving type catalytic bed system, heat efficiency of the catalytic bed is effectively improved, the heat loss is reduced, the heat recovery utilization rate, combustion efficiency and the purification rate are improved, heat exchange is increased, heat energy is more reasonably utilized, and the energy saving and emission reduction requirements are met.

A projection optical system is a system with good imaging performance based on well-balanced compensation for aberration associated with image height and aberration associated with numerical aperture, while ensuring a large effective image-side numerical aperture in the presence of a liquid in the optical path between the projection optical system and an image plane. The projection optical system forms an image of a first plane on a second plane. An optical path between an optical member located nearest to the second plane out of optical members with a refractive power in the projection optical system, and the second plane is fillable with a predetermined liquid. The projection optical system satisfies the condition of 0.02<NA×WD/FA<0.08, where NA is a numerical aperture on the second plane side of the projection optical system, WD a distance along the optical axis between an optical member located nearest to the first plane in the projection optical system, and the first plane, and FA a maximum of effective diameters of all optical surfaces in the projection optical system.