32results about How to "Reduce the amount of change" patented technology

The invention provides an organic light-emitting diode (LED) pixel circuit and a display device. The organic LED pixel circuit comprises an organic LED, a drive transistor and a resistor, wherein the organic LED is driven to emit light by the source drain current of the drive transistor; the resistor is coupled to a source electrode of the drive transistor, and is used for restraining the change of the source drain current through changing the voltage of the drive transistor when the strength of the source drain current is changed. According to the organic LED pixel circuit and the display device, the resistor is additionally arranged on the source electrode of the drive transistor in the organic LED pixel circuit, so that the voltage of the drive transistor can be changed along with the drift of the current Id, and is fed back to the drive transistor, thereby, the variation of the current Id is reduced, and the condition that a display effect is changed because of current drift is improved.

The invention discloses an array substrate, a display panel and a display device and belongs to the display technology field. A display area and a non-display area are included. The display area comprises a plurality of gate lines which are extended along a first direction and a plurality of data lines which are extended along a second direction. The array substrate comprises at least one segmentof special-shaped edge. The non-display area comprises a plurality of shifting registers. The shifting registers comprise a plurality of transistors. The plurality of transistors comprise sensitive transistors and non-sensitive transistors. The plurality of shifting registers comprise at least one first shifting register. The first shifting register is adjacent to the special-shaped edge. In the first shifting register, the channel direction of at least one sensitive transistor is parallel to the first direction or the second direction, and the channel direction of at least one non-sensitive transistor is intersected with the first direction and the second direction. Compared with the prior art, the uniformity of the thickness of the array substrate corresponding to a part of the non-display area where the first shifting register is located can be improved, and display quality is increased.

The invention provides a VoIP steganography method based on optimum similarity matching, and belongs to the technical field of safety communication. The VoIP steganography method is suitable for covert communication with VoIP serving as a carrier. The method includes the pre-agreement step, the covert information embedding step and the covert information extracting step. Based on the basic principle that the larger the similarity between the embedded covert information and the carrier is, the smaller the distortion generated in the steganography process is, multiple heuristic modulation is conducted on covert information in advance with the increase of the similarity as guide, a covert information mode with the optimum similarity to the carrier is finally selected for information hiding, the variation of the carrier is greatly reduced, and the sensory quality of the VoIP is effectively maintained; in addition, the method is unrelated to a specific voice encoder, suitable for all encoders capable of being applied to the VoIP and good in universality.

The invention discloses a composite type eccentric one-cone bit and belongs to the technical field of drilling devices for oil and gas, mine engineering, building foundation engineering construction, geology, hydrology and the like. The composite type eccentric one-cone bit comprises a bit body, a roller, a cone and a cone front fixed cutting structure, wherein cone cutting teeth are distributed on the cone, fixed cutting teeth are distributed on the cone front fixed cutting structure, a shaft neck is arranged on the bit body, the cone is in rotary connection with the shaft neck, the cone front fixed cutting structure is fixedly connected with the front end of the shaft neck, the deviation S exists between the axis of the shaft neck and the axis of the bit, an absolute value is larger than zero and smaller than or equal to d/3, and the d is the outer diameter of the bit. By adopting the composite type eccentric one-cone bit, the hydraulic power condition of the bit can be improved while the rock breaking efficiency of the bit is improved, and the service life of the bit is prolonged.

An annular cylinder chamber (C1, C2) of a cylinder (21) is partitioned into an outer cylinder chamber (C1) and an inner cylinder chamber (C2) with an annular piston (22). The cylinder (21) is caused to eccentrically rotate by driving an electric motor (30), thereby changing the volumes of the outer cylinder chamber (C1) and the inner cylinder chamber (C2). The volume ratio Vr of the inner cylinder chamber (C2) to the outer cylinder chamber (C1) is set at about 0.7. In this state, the output torque of the electric motor (30) is changed in accordance with a variation in the load torque in one turn of rotation.

The invention discloses an exhaust control mechanism and a blood pressure measurement device. The exhaust control mechanism comprises a first cylinder, a division body and a valve core. The division body is arranged in the first cylinder and divides the first cylinder into an upper chamber and a lower chamber. A first air inlet and an exhaust outlet both communicated with the upper chamber are arranged at the upper end of the first cylinder. A second air inlet is arranged at the lower end of the first cylinder. External pressure gases enter the lower chamber through the second air inlet. The valve core is located above the division body, is opposite to the first air inlet, and can move up and down along with the division body. The first air inlet is a counter bore. The diameter of the counter bore is increased along the downward movement of the valve core. In the counter bore, the valve core moves upwardly to block the first air inlet, and moves downwardly to open the first air inlet.The exhaust control mechanism has the advantages that the air outlet is set in the shape of the counter bore, variation of the movement of the valve core to through-flow section can be reduced, and accordingly, an airbag can exhaust the gases stably and evenly by the exhaust control mechanism.

The invention relates to the field of optical devices, in particular to a lens design method which comprises the following steps: S11, analyzing to obtain a sensitive surface of a lens; s21, setting a first maximum deformation quantity of the sensitive surface according to a preset parameter; and S3, analyzing to obtain a first position interval of the central surface of the abutting table on the lens according to the first maximum deformation quantity of the sensitive surface. Through the setting of the steps, the pressure in the radial direction of the lens is reduced, then the possibility of deformation is reduced, the possibility that the lens is difficult to image is reduced, and the imaging quality of the lens is improved.

The invention belongs to the field of paper-making industry, and particularly relates to powdered activated carbon (PAC) modified bentonite, a preparation method and application of the PAC modified bentonite as well as a green-liquor desilication method. The preparation method comprises the following steps: preparing PAC modified bentonite, dissolving 5-20g of bentonite in 1-5L of water, stirring into suspension, adding 0.5-5g of PAC in the suspension, stirring for 1-5 hours, taking out, standing for 12-24 hours, pouring the supernatant, drying the lower turbid liquid in a drying oven for 12-24 hours, taking out, grinding and screening, namely obtaining the PAC modified bentonite, wherein the PAC modified bentonite prepared by the method is small in usage amount, large in interlayer spacing and large in specific surface area; pouring the clarified causticization section green liquor into a beaker, heating to the temperature to be 90-100 DEG C, weighing the PAC modified bentonite obtained in the step 1 according to the mass-volume concentration 0.5-5g/100mL of the PAC modified bentonite and green liquor, adding the bentonite into the green liquor, stirring and reacting for 5-30 minutes, and filtering. The desilication rate can reach 22-76%, the pH change is 0.08-1.1% of the original green liquor, and the method disclosed by the invention is simple in operation, small in usage amount of desilication agents, low in cost, high in desilication rate and slight in pH influence of the green liquor.