53results about How to "Reduce scan frequency" patented technology

The invention provides a display panel and a drive method of the display panel. The display panel comprises a thin film transistor (TFT) array substrate, the TFT array substrate comprises a plurality of scanning lines and a plurality of data lines, and the plurality of scanning lines and the plurality of data lines cross and limit a plurality of pixel units; each pixel unit comprises a TFT switch, a pixel electrode and a storage capacitor, grids of the TFT switches are connected with the scanning lines, source electrodes of the TFT switches are connected to the data lines, and drain electrodes of the TFT switches are connected to the pixel electrodes; a refresh rate of a scanning signal is less than 50 hertz, each frame scanning signal is divided into a signal updating stage and a picture maintaining stage, capacitance of the storage capacitor meets a preset value, picture display is guaranteed to maintain in the picture maintaining stage after the signal update stage of a current frame scanning signal is completed and before the signal update stage of a next frame scanning signal comes, wherein a data signal is input into the display panel in the signal updating stage, and no data signal is input into the display panel in the picture maintaining stage. The technical scheme is capable of reducing power consumption.

A display method used for a display which has a backlight module suitable to provide more than M types of primary color lights, where M=3. The display panel of the display has an array of pixel regions. The display method provides these pixels regions to display multiple image data to be display in multiple frame times. Each of the image data includes (L1_N, L2_N, . . . , LM_N) each representing the brightness of the M primary color light in each pixel region, where N is a positive integer. The backlight module sequentially provides M-1 primary color lights within any two successive frame times, so allow the image data to drive the pixel regions. The first and the M^th primary color lights provide the frame times for these two successive frame times.

The invention discloses a screen parameter adjustment method and apparatus, a terminal and a computer readable storage medium. The method comprises the following steps: when a screen turning on instruction is received, obtaining a first ambient brightness value; judging whether the first ambient brightness value exceeds a preset ambient brightness value; if the first ambient brightness value exceeds the preset ambient brightness value, reducing the screen scanning frequency. By adoption of the screen parameter adjustment method disclosed by the embodiment of the invention, when the screen turning on instruction is received, the first ambient brightness value is obtained, whether the first ambient brightness value exceeds the preset ambient brightness value is judged, and if the first ambient brightness value exceeds the preset ambient brightness value, the screen scanning frequency is reduced to reduce the power consumption of the screen.

The invention discloses a gate driving device, a driving method and a display panel. The gate driving device comprises a plurality of shift registers, a first driving switch and first thin film transistors, wherein the output ends of scanning signals of first shift registers are connected with the drain electrode of at least one first thin film transistor, the input ends of scanning signals of second shift registers are connected with the source electrodes of the first thin film transistors, and the grid electrodes of the first thin film transistors are connected with the first driving switch; when the first driving switch is started to work, the second shift registers receive the scanning signals sent by the first shift registers, when the second shift registers receive the scanning signals, at least one third shift register synchronously receives the scanning signals sent by the first shift registers, so that first-level shift registers synchronously drive at least two-level shift registers to ensure the need of image display and further lower the power consumption of the device for images with lower resolutions.

The embodiment of the invention discloses a digital driving pixel circuit, a driving method thereof and a display device. The digital driving pixel circuit comprises a data writing control module, a driving module, a light emitting module and n latch modules, the control end of the data writing control module is electrically connected with the scanning signal input end of the digital driving pixelcircuit; wherein the first input end is electrically connected with the refreshing control signal input end of the digital driving pixel circuit, the second input end is electrically connected with the data voltage signal input end of the digital driving pixel circuit, and the output end of the data writing module is electrically connected with the control end of the driving module; the data write-in control module is used for sequentially writing the mth data voltage into the mth latch module when the control end of the data write-in control module receives the scanning signal and the firstinput end receives the refreshing signal, and m is greater than or equal to 1 and less than or equal to n; the working frequency of the data driving circuit in the display device can be reduced, the power consumption of the data driving circuit is reduced, and finally the power consumption of the whole display device is reduced.

The invention provides a touch screen control method and a mobile terminal. The method comprises the following steps: when a touch panel receives a touch operation while the mobile terminal in a screen-on state, detecting a touch area corresponding to the touch operation; and when the touch area is larger than or equal to a preset area, lowering the touch control scanning frequency of the touch panel from first frequency to second frequency. According to the touch screen control method, the problem of influence of screen touch sounding on the user experience can be solved in a way of loweringthe touch control scanning frequency. Moreover, the way of eliminating screen touch sounding by lowering the touch control scanning frequency has the advantages of easiness in implementation, low costand remarkable effect. Through adoption of the touch screen control method, the user experience can be improved; the power consumption of the mobile terminal can be lowered at the same time; and thecruising ability of the mobile terminal is enhanced.

A digital display unit receiving a display signal with image encoded at high origin frequencies (e.g., dot clock). A display signal interface samples the display signal during source display time to generate pixel data elements representative of the images encoded in the display signal. The signal is sampled at a sampling frequency equal to origin frequency. The pixel data elements are stored in a buffer at the sampling frequency and retrieved at a slower frequency. Display signals are generated for each horizontal scan line of a digital display screen during a destination display time at this slower frequency. The destination display time is designed to be longer than the source display time, which enables the display signals to be generated from all pixel data elements. The destination display time is longer than the source display time because digital display units do not require the long non-display times present in the display signals.

The embodiment of the invention discloses a control method and device for a touch screen, a storage medium and a terminal. The method comprises the following steps: obtaining unlocking frequency of a user when the touch screen of the terminal is in the screen-locking state; determining whether the unlocking frequency is larger than the first pre-set frequency threshold valve or not; and reducing scanning frequency in a target display region when the unlocking frequency is larger than the first pre-set frequency threshold valve. The embodiment adopts the above technical scheme so that the scheme for controlling the touch screen when the unlocking of the touch screen of the terminal is optimized, thereby reducing power consumption of the touch screen.

An electric machine, as well as a method for operating such a machine, particularly for motorically moving movable parts in a motor vehicle, having a stator and a rotor, slots being developed on the rotor, in which individual conductor loops of electric coils are situated, which are contacted to commutator segments of a commutator and to an evaluating unit, which ascertains rotational speed data from the ripple of a motor current signal. The number of individual conductor loops of the coils is selected in such a way that the sequence of the number of the conductor loops in the order of their commutation approximately represents a sine function.

The invention relates to the technical field of aircrafts and discloses an unmanned aerial vehicle which comprises a machine body in communication connection with a ground station; the machine body comprises a machine main body and two wings symmetrically arranged on the two sides of the machine main body; the machine main body is internally provided with a central control unit; the machine body is in communication connection with the ground station through the central control unit; the bottom of the machine main body is provided with a first camera used for photographing a flight environmentand a second camera used for photographing the ground condition; a radar cover is detachably connected to the bottom of the machine main body and is internally provided with a laser radar; the bottomof the radar cover is provided with a laser scanning hole, through which a laser beam emitted by the laser radar passes; the first camera, the second camera and the laser radar are all electrically connected with the central control unit; and the aspect ratio of each wing is larger than or equal to 12. By adopting unmanned aerial vehicle provided by the invention, the efficiency of laser radar inspection can be improved, the quality of data acquired by the radar is improved, and the probability of collision of the unmanned aerial vehicle and the laser radar is reduced, so that the safety of the machine body is improved, and the inspection cost is lowered.

The invention relates to a touch screen scanning method, a computer device and a storage medium. The method includes the steps: A scanning a touch screen according to a preset scanning frequency to detect whether touch points are arranged on the touch screen or not; B reducing the scanning frequency if the touch points are not detected; C scanning the touch screen according to the reduced scanningfrequency; D repeating the step B and the step C until the scanning frequency is reduced to smallest scanning frequency of normal working of the touch screen, and scanning the touch screen by the smallest scanning frequency. By the method, the power consumption of the touch screen can be reduced, and the use time of the touch screen is prolonged.

The invention provides a flat panel CT (computed tomography) machine. The flat panel CT machine comprises a ray emitter and a flat panel detector, wherein the ray emitter adopts 360-degree or 180-degree scanning; the length of the flat panel detector in the axial direction perpendicular to circular motion of the flat panel detector is larger than 17 inches. The flat panel detector has larger length and width than a flat panel detector for DSA, can cover single part of the human body and requires no helical scanning. A bed does not move during scanning, the scanning time is substantially reduced, and motion artifact can be effectively reduced; the irradiation dosage of patients can be substantially reduced; the spatial resolution and longitudinal scanning layer number are substantially increased, gapless scanning is realized, and missing examination can be ensured. An X-ray emission pulse control technology is adopted, trailing and afterglow are avoided, so that data obtained by the CT machine are more real, and images are clearer. By use of the pulse control technology or semi-circle scanning manner, the scanning frequency is halved, and the flat panel CT machine has the possibility of actual application by redesigning the element number of the detector.

The present invention provides a CT flat panel detector. Each array element is provided with an independent post-stage operational amplifier and an analog-to-digital converter, and each array element scans at the same time by taking a row as a unit to obtain a projection matrix of a tangent plane where each row is located. The invention further provides the CT machine. By enlarging the size of the flat panel detector, the CT machine can obtain the requirement of each section image of one part by scanning a circle or a half circle, and spiral scanning is not needed any more; the internal circuit of the acquisition unit is improved, so that the circuit structure meets the requirements of CT scanning, and better image quality under respective conditions is obtained; the substrate adopts a double-sided technology, so that the signal-to-noise ratio is improved; the scanning frequency is reduced by reducing the number of array elements in each row; and through a ray pulse control technology of a CT machine, or through removing a TFT for reading in an array element and transferring the function to a peripheral circuit, the requirement of the CT machine on the mobility of a thin film transistor of the detector is reduced, so that the CT flat panel detector can be practically applied.

The invention relates to a keyboard scanning method and apparatus, a computer device and a storage medium. The method comprises the steps of obtaining usage frequencies of key codes in a keyboard, anddividing all the key codes into multiple key code regions according to the usage frequencies of the key codes; setting different scanning frequencies for different key code regions, wherein the lowerthe usage frequencies of the key codes are, the lower the scanning frequencies corresponding to the key code regions where the corresponding key codes are located are; and according to the scanning frequencies, scanning the key codes comprised in the different key code regions. According to the technical scheme, the key codes are divided into the different key code regions according to the usagefrequencies of the key codes on the keyboard, and the corresponding scanning frequencies are set for the key code regions, so that the corresponding scanning frequencies can be set according to the usage frequencies of the key codes in the key code regions, the scanning times of the keyboard are reduced, and the radiation of the keyboard is reduced.

The invention provides a flat-panel CT machine, which comprises a ray emitter and a flat-panel detector and adopts 360-degree scanning or 180-degree scanning. The length and width of a flat-panel detector are larger than those of a DSA flat-panel detector, the flat-panel detector can cover a single part of a human body, and spiral scanning is not needed any more. The scanning time is greatly shortened, and motion artifacts can be effectively reduced; the irradiation dose of a patient is greatly reduced; the spatial resolution and the number of longitudinal scanning layers are greatly improved,and gapless scanning is achieved. An X-ray emission pulse control technology is adopted, so that data obtained by the CT machine is complete and free of loss, and images are clearer. The scanning frequency is reduced by half through a pulse control technology or a 180-degree scanning mode; the requirement on the mobility of a thin film transistor of the detector can be reduced by about 10 times by a pulse control technology; the frequency is further reduced by redesigning the array element number of the detector, and the inversion frequency of a ray emitter is controlled within an achievablerange, so that the CT machine has the possibility of practical application.

The invention provides an anti-interference method and device for a touch key, electronic equipment and a storage medium, and the method comprises the steps: obtaining a first baseline value of the touch key through scanning; and judging whether the first baseline value of the touch key has interference or not, if the first baseline value of the touch key has interference, reducing the scanning frequency of the touch key, and generating a second baseline value of the touch key. And acquiring a current key value of the touch key, and judging whether the touch key is pressed down or not according to the current key value of the touch key and the second baseline value of the touch key. Therefore, anti-interference processing is carried out on the baseline value of the touch key by reducing the scanning frequency of the touch key, whether the touch key is pressed down or not is judged, and anti-interference of the touch key is effectively achieved. The technical problems that in the priorart, interference resistance is achieved by adding a waterproof structure, and the cost is too high are solved.