153results about How to "Increase scan frequency" patented technology

The invention relates to a scanning method for projected capacitive touch panels, which includes the following steps that: (a) the self capacitance reference values of each first electrode and each second electrode and the mutual capacitance reference value of each intersection are set; (b) a controller scans the self capacitances of all the electrodes to obtain the current self capacitance value of each electrode, which is compared with the self capacitance reference value corresponding to the electrode to determine that the first and the second electrodes with the changed self capacitance values are touched; and (c) the controller scans the mutual capacitance of each intersection between the first and the second electrodes determined to be touched in the step b to obtain the current mutual capacitance value of each intersection, which is compared with the mutual capacitance reference value corresponding to the intersection to determine that the area where the intersection with the changed mutual capacitance value is positioned is an actually touched area. The method effectively combines self capacitance scanning with mutual capacitance scanning, the scanning frequency is high, the precision is high, and the method is particularly suitable for the multi-spot scanning of medium-sized and large-sized touch panels.

The present invention relates to a method for scanning a projective capacitive touch panel including: A. scanning each first-axis electrode arranged along a first-axis and each second-axis electrode arranged along a second-axis, then obtaining the first-axis electrode and the second-axis electrode whose self capacitance changes; B. detecting the mutual capacitance at each intersection between the first-axis electrode and the second-axis electrode whose self capacitance changes to determine whether the mutual capacitance changes, then the area where the mutual capacitance changes being taken as a touched area. The present invention also relates to a storage medium storing instructions of implementing above method and an apparatus that implements the above method.

A laser scanning unit mainly includes a semiconductor laser, a collimator, a micro electronic mechanic system (MEMS) oscillatory mirror, and an fθ lens or an f sin θ lens. The MEMS oscillatory mirror is disposed between the collimator and the fθ lens to replace a conventional rotary polygonal mirror for controlling a direction in which laser beams are projected from the oscillatory mirror to the fθ lens. With the MEMS oscillatory mirror, the cylindrical lens may be omitted from the laser scanning unit and noises produced by the polygonal mirror rotating at high speed may be avoided. Moreover, the MEMS oscillatory mirror allows bi-directional scanning to therefore enable increased scanning frequency, simplified structure, and improved scanning efficiency.

A liquid crystal panel, a liquid crystal display, and a driving method thereof are disclosed. The liquid crystal panel comprises scanning lines, data lines, and a plurality of pixels, each of the plurality of pixels including a TFT, a pixel electrode, a first common electrode, and a second common electrode. The first common electrodes of first pixels of the plurality of pixels are electrically connected via a first common line, the first common electrodes of second pixels of the plurality of pixels are electrically connected via a second common line, and the second common electrodes of the plurality of pixels are electrically connected.

The invention relates to a laser ultrasonic detection method and a laser ultrasonic detection system for rapidly locating defects. The laser ultrasonic detection method comprises the following steps: a laser emits pulse laser light, and a galvanometer scanning system is adopted to act on a workpiece to be detected; an air coupling surface wave probe is arranged at the same side of the workpiece to be detected and is used for receiving a scattered signal generated by the defect of a detected part; a subarea where the defect is located in the detected part is judged according to the received scattered wave, and the defect area can be rapidly located; and the defect of the defect area can be accurately located along with gradual reduction of the defect area according to the ultrasonic propagation imaging principle. According to the method and the system, the defect can be rapidly located, the data processing load is small and the detection efficiency is high.

A head-up display for a vehicle has a laser and a scanning system. An image, which is to be displayed in the field of vision of the driver of the vehicle and which is composed of individual pixels, is produced pixel-by-pixel by the laser and the scanning system. The head-up display has a projection system having a projection surface and a magnifying optical system. The projection system projects the image to be displayed onto a virtual image plane and magnifies the image in the process. The size of the pixels in the virtual image plane is smaller than the resolving ability of the human eye, which is the case for an angular distance less than 0.5′, for example.

The invention discloses a sensing system based on optical OFDM (Orthogonal Frequency Division Multiplexing) and an FBG (Fiber Bragg Grating) monitoring method thereof, relating to the field of optical fiber sensing. The sensing system comprises an adjustable optical source, an electrooptical modulator, an optical circulator, a weak reflective FBG array, a wavelength tuning control circuit, a signal generator, an optical detector and a digital decoding and control unit, wherein the adjustable optical source is used as a signal optical source; the electrooptical modulator is used for modulating data onto signal optical waves; the optical circulator is used for separating optical signals which are in an incident direction from optical signals which are in a reflective direction; the weak reflective FBG array is used as a sensing element for reflecting the optical signals to the optical circulator; the wavelength tuning control circuit is used for tuning the emitting wavelength of the adjustable optical source; the signal generator is used for generating electric signals which are encoded based on OFDM; the optical detector is used for converting the reflective optical signals into the electric signals; and the digital decoding and control unit is used for positioning an FBG sensor and acquiring variables to be detected. In the invention, by combining the FBG monitoring method based on the optical OFDM, the arrangement density and the sensing distance of FBG sensors are improved, the scanning frequency and the spatial revolution of the system are improved, and large-capacity measurement requirements are satisfied.

The invention discloses a micromirror-based shared window laser radar system. The system comprises a laser, a single-sided reflector, a micromirror, a converging lens and a light detector; a first through hole is formed in the single-sided reflector; a laser beam generated by the laser is emitted to the micromirror through the first through hole, and thereafter, is emitted to a detection target through the micromirror; an echo light beam reflected from the detection target is reflected to the single-sided reflector by the micromirror and is reflected to the converging lens through the single-sided reflector; and the echo light beam is converged to the light detector through the converging lens. According to the micromirror-based shared window laser radar system of the present invention, the micromirror is adopted to replace a mechanical rotation structure, and therefore, equipment size can be greatly reduced, scanning frequency can be increased, and energy consumption is low.

The invention provides a pulse laser radar for large scale mapping and a method of the pulse laser radar. N sets of laser emitting units and echo detecting units are arranged on a laser head of the pulse laser radar, N>=2, and the N sets of laser emitting units and echo detecting units are distributed along the outer diameter of the laser head with a 2pi / N central angle with a rotary shaft as a center. Each laser emitting unit comprises a laser and an emitting optical system, each echo detecting unit comprises a detector and a receiving optical system, and according to the distance between the emitting optical systems and the receiving optical systems, the echo energy receiving rate ranges from 10 percent to 75 percent when the detecting distance ranges from 2 m to 15 m. High scanning frequency can be achieved, and the distance detecting dynamic range can be improved.

The invention discloses a security monitoring system which comprises at least one laser radar, a control module and at least one camera module. Each laser radar is provided with a preset target detection area; the laser radar is used for obtaining first point cloud data based on a laser radar coordinate system; the control module is connected with the at least one laser radar, and is used for converting the first point cloud data into second point cloud data under a space coordinate system and carrying out obstacle identification according to the second point cloud data, and determining the coordinates of the obstacle in the space coordinate system according to the third point cloud data of the obstacle in the space coordinate system when the obstacle is identified; the control module is further connected with at least one camera module and used for controlling the camera modules to acquire images of the obstacles according to the coordinates of the obstacles in the space coordinate system. According to the security and protection monitoring system provided by the invention, accurate illegal intrusion monitoring on the perimeter of a large-range area is realized.

A liquid crystal panel, a liquid crystal display, and a driving method thereof are disclosed. The liquid crystal panel comprises scanning lines, data lines, and a plurality of pixels, each of the plurality of pixels including a TFT, a pixel electrode, a first common electrode, and a second common electrode. The first common electrodes of first pixels of the plurality of pixels are electrically connected via a first common line, the first common electrodes of second pixels of the plurality of pixels are electrically connected via a second common line, and the second common electrodes of the plurality of pixels are electrically connected.

The invention discloses a system and method for demodulating fiber bragg gratings based on the liquid crystal F-P cavity adjustable filter technology. The liquid crystal F-P cavity adjustable filter technology is adopted so that the wave length demodulation performance can be improved and cost can be reduced. Meanwhile, the IL of the whole system is reduced through an annular device structure, the demodulation detection power is improved, the light source performance is improved through an opto-isolator ISO, echo interference is reduced, the performance of a whole demodulator is improved, the reliability of the system is enhanced, the function of efficient fiber bragg grating demodulation of a multichannel array is achieved through a multichannel array annular device and an array detector mini-PD structure, practicality is high, the performance is excellent, cost is low, reliability is high, and therefore production in batches is easy.

The invention provides a multiline laser radar based on a plurality of lasers. The multiline laser radar comprises a rotor; a stator; a carrier provided with a plurality of laser devices and disposed within the rotor; and a light collimating device. The projection points of the laser devices on the carrier have a density distribution in the vertical direction on a vertical plane including the principal axis of the light collimating device. The light collimating device is arranged in the rotor. The multiline laser radar of the invention has advantages such as a high vertical angle resolution, a high horizontal angle resolution, a high scanning frequency, a more accurate scanning result, etc.

The present invention belongs to the laser radar field and provides a laser radar acquisition and ranging apparatus. The laser radar acquisition and ranging apparatus includes a laser output device which is used for outputting collimated laser, a laser scattering device which is arranged on the laser path of the laser output device and is used for scattering the collimated laser to 360-degree ring-shaped laser, and image sensing devices which are arranged around the laser output device and can receive laser signals reflected by a measured object in an all-direction manner. With the laser radar acquisition and ranging apparatus adopted, 360-degree full-angle signal acquisition can be realized, and angle resolution and scanning frequency can be improved.

A Fabry-Pérot tuneable filter device is described with reflecting elements separated by an optical path length to form an optical resonator cavity. A first actuator means is directly or indirectly coupled with a first reflecting element. And the first actuator means is configured to modulate the optical path length between first and second reflecting elements by a modulation amplitude to thereby sweep the optical resonator cavity through a band of optical resonance frequencies with a sweep frequency of 70 kHz or more. And the mechanical coupling between selected elements of the arrangement is sufficiently low such that when operated at the sweep frequency, the selected elements act as a system of coupled oscillating elements. In addition or alternatively, the first actuator means is directly or indirectly coupled with the first reflecting element so as to substantially drive the first reflecting element only.

A laser scanning unit mainly includes a semiconductor laser, a collimator, a micro electronic mechanic system (MEMS) oscillatory mirror, and an fθ lens or an fsin θ lens. The MEMS oscillatory mirror is disposed between the collimator and the fθ lens to replace a conventional rotary polygonal mirror for controlling a direction in which laser beams are projected from the oscillatory mirror to the fθ lens. With the MEMS oscillatory mirror, the cylindrical lens may be omitted from the laser scanning unit and noises produced by the polygonal mirror rotating at high speed may be avoided. Moreover, the MEMS oscillatory mirror allows bi-directional scanning to therefore enable increased scanning frequency, simplified structure, and improved scanning efficiency.

The invention provides an offline positioning method based on the wireless hot spot, which comprises the following steps:scanning the wireless hot spot around the device and getting the hot spot parameter, at least the hot spot position and the positioning signal strength are obtained based on the hot spot parameter; if the number of the wireless hot spot around the device is 1, the hot spot position of the output is the position of the device; if the number if the wireless hot spot is 2, the device location is mapped to the line between the corresponding position of the two wireless hot spot, and the mapping position is taken as the position of the device; if the number of the wireless hot spot around the device is greater than or equal to 3, the device position is mapped to the connection between the corresponding position of the two wireless hot spot and the centroid of the corresponding mapping position is used as the position of the device. The offline positioning method based on the wireless hot spot realizes the quick positioning of the user side.

The invention provides a non-contact type three-dimensional scanner based on a micro mirror. The non-contact type three-dimensional scanner is characterized by comprising four upright posts distributed squarely, wherein the four upright posts are respectively positioned at four vertexes of the square; an intersection point of the square is overlapped with the center of a test board; a linear laser generator, a reflective micro-electro-opto-mechanical system (MOEMS) micro scanning mirror and two industrial cameras are arranged on each upright post; a center line of the reflective MOEMS micro scanning mirror falls on the center position of a measured human body; the measured human body can be covered by a visual field of each industrial camera; the two industrial cameras on each upright post are symmetrically arranged at the specific angle relative to the upper part and the lower part of the reflective MOEMS micro scanning mirror; and the linear laser generator is arranged between the reflective MOEMS micro scanning mirror and the industrial camera positioned above the reflective MOEMS micro scanning mirror. Compared with a traditional scanning device, the invention has the advantages of small size, low power consumption, high scanning frequency and the like as well as simpleness and convenience for operation and low cost; the non-contact type three-dimensional scanner can replace a traditional deflection scanning device; and the precision of the non-contact type three-dimensional scanner can meet the measuring requirement of dressing models.

The invention discloses a double-scanning view filed shared window laser radar system based on a micromirror, the laser beam generated by a laser is divided into two paths through a laser beam splitter, one path of laser light beams is emitted to the micro-mirror through a first through hole, and is emitted to a detection target through the micro-mirror; and the other path of laser light beam is reflected by a reflector and then is emitted to the micromirror through a second through hole, and is emitted to the detection target through the micro-mirror; the laser beams emitted to the micromirror through the first through hole and the second through hole have a first included angle theta; the echo light beams reflected from the detection target are reflected to the first single-side reflector and the second single-side reflector through the micromirror, and are received by the corresponding light detectors. According to the invention, the laser beam splitter is used for doubly scanning the view field, and the laser radar system can achieve a large enough scanning angle, and is particularly suitable for being applied to full-automatic driving with high requirement on a scanning view field.

A method and a CT system are disclosed for detecting and differentiating plaque in vessel structures of a patient. In at least one embodiment, a computed tomography system that is equipped with at least one focus detector system and, per focus detector system, with at least one transradiated x-ray / optical grating, is used to reconstruct the spatial distribution of the refractive index in the region of vessel structures of the patient from detected projection data. Further, at least one plaque form is highlighted in a pictorial display on the basis of a previously known value range of the refractive index for at least one plaque form.

The invention relates to a method for extracting an absorption characteristic peak in gas field monitoring. The method comprises the following steps: a smooth filtering step, a characteristic peak seeking step, a window linear fitting step and a characteristic peak background calculation and deduction step, wherein in the smooth filtering step, obtaining an original spectral array, then creating a smooth spectral array by adopting a moving average method and transferring to the absorption characteristic peak seeking step; in the characteristic peak seeking step, creating a first-order differential spectral array and a second-order differential spectral array and transferring left and right endpoints xL and xR of the absorption characteristic peak to the window linear fitting step; in the window linear fitting step, adopting a least square method to fit scattered data points in windows at the left and the right ends of the characteristic peak to obtain slopes and intercepts of fitting straight lines on the left side and the right side and transferring to the characteristic peak background calculation and deduction step; in the characteristic peak background calculation and deduction step, calculating a spectral background array within the range of the absorption characteristic peak through recursive interpolation for many times, and deducting a vector of a spectral intensity value stored in the smooth spectral array from a vector of a spectral intensity value stored in the spectral background array obtained by calculation to obtain a spectral array after background deduction and transferring to the smooth filtering step.

The invention provides a curve vehicle location device and method. The device comprises a laser scanning unit and a central processing unit, wherein the laser scanning unit is used for collecting a curve area distance measurement waveform in real time, and the central processing unit is connected with the laser scanning unit and used for receiving the curve area distance measurement waveform sent by the laser scanning unit and performing coordinate transformation, interference elimination and area search on the current-frame distance measurement waveform to determine the information of the scanning point position corresponding to the current-frame vehicle area. The current-frame vehicle area is matched with a front-frame vehicle area to determine a curve new vehicle or a curve area advancing vehicle corresponding the current-frame vehicle area, and the real-time vehicle location parameters can be obtained and output according to the information of the scanning point position corresponding to the current-frame vehicle area. The method is real-time in location, high in location accuracy, rich in location information and capable of solving the problem about safe passing through the curve in auxiliary driving or unmanned driving.

The invention provides a loop vehicle detector which is internally provided with a plurality of external feeder lines, a secondary coil inductance connected with the external feeder lines, a channel scanning circuit connected with the secondary coil inductance and a singlechip connected with the channel scanning circuit, wherein the singlechip controls the channel scanning circuit to open the next input channel and close the previous one; and when the singlechip detects that the connection between one of the input channels and the external feeder lines is interrupted, the singlechip shields the input channels and detects the next input channel, thereby shortening the scanning period, accelerating the scanning frequency, enhancing the system precision and improving the reliability of data acquisition compared with the prior art.

A scan trajectory of a laser beam is controlled based on external signals each related to a driving direction and a driving speed, a result obtained by detection of an obstacle, and signals related to distances to the obstacle. For example, at the time of a right turn, a scan trajectory for increasing scan frequency on a portion shifted in a right-turn direction from a center axis in a driving direction is set. At the time of high-speed driving, a scan trajectory for increasing scan frequency on a center portion in the driving direction is set. When the obstacle is detected at a position corresponding to a distance shorter than a threshold distance, a scan trajectory for increasing scan frequency in the vicinity of the obstacle is set. Detection of the obstacle and monitoring of a state thereof are adequately and smoothly performed at the time of changing of the driving direction, the time of high-speed driving, and the time of detection of the obstacle.

The invention relates to a preparation method of carbon nanotube arrays. The method comprises the steps: a base is provided; one surface of the base is provided with a layer of catalyst; the mixed gas of carbon source gas and carrier gas flows across the surface of the layer of catalyst; laser beams are focused on the base after passing through a galvanometer scanning system, thus growing the carbon nanotube arrays.

The invention discloses a laser active detecting device based on an MEMS (micro-electromechanical system) two-dimensional scanning mirror array. A DSP (digital signal processor) signal processing circuit 1 is used for generating a laser pulse control signal to control a laser ranging device array to emit a pulse laser beam; after being scanned by the MEMS two-dimensional scanning mirror array, the laser beam is irradiated on a detected target; after the laser beam is reflected back to the laser ranging device array, the distance of the detected target is measured by the laser ranging device array according to a time difference between the laser pulse emission and the laser pulse receiving; and a control bus is utilized by the DSP signal processing circuit to control an FPGA (field programmable gate array) logic circuit to be respectively connected with four sets of laser ranging device arrays of the MEMS two-dimensional scanning mirror array, so as to read a measuring result into the DSP signal processing circuit. The device provided by the invention has the advantages of simple structure, high scanning speed, large scanning scope, low cost, small volume, light weight, and the like.

An optical scanning apparatus includes an in-plane vibratory mass platform having at least one diffraction grating formed thereon as the scanning element, at least one flexure structure that connects the mass platform to at least one fixed support, and at least one driving actuator that drives the mass platform into an in-plane vibratory motion which can be rotational and / or translational. The apparatus may also be formed by a mass platform having at least one diffraction grating formed thereon as the scanning element, at least one driving actuator connected to the mass platform through at least one flexure structure. The driving actuator drives the mass platform into an in-plane vibratory motion.

The embodiment of the invention discloses a touch control device and a driving method thereof and a touch control display panel and a driving method thereof. The touch control device comprises multiple drive electrodes which are arranged side by side in the first direction, multiple sensing electrodes which are arranged side by side in the second direction and a control circuit, the multiple drive electrodes are at least divided into a first drive electrode assembly and a second drive electrode assembly, the control circuit is used for driving the electrodes to provide drive signals and detect sensing signals in the sensing electrodes, any two drive electrodes in each drive electrode assembly in the multiple drive electrodes are not scanned simultaneously, any one drive electrode of the second drive electrode assembly and one drive electrode of the first drive electrode assembly are scanned simultaneously, the time for each full screen scanning in the touch control device is shortened, that is to say, in the same time, the frequency of full screen scanning in the touch control device is increased, the scanning frequency of the touch control device is further increased, the point report rate of the touch control device is further increased, and the touch control sensitivity of the touch control device is finally improved.

The invention discloses a backlight module, a driving method thereof and a display device. The backlight module comprises a light-emitting area, at least one scanning driving module and at least one data updating module, wherein the light-emitting area comprises a plurality of control lines, a plurality of signal lines and a plurality of light-emitting units; the data updating module comprises a first storage unit and a second storage unit which are connected electrically; before a light-emitting stage, the first storage unit is used for receiving a data signal of a first light-emitting frameand transmitting the data signal to the second storage unit; on a mth light-emitting frame, the second storage unit is used for supplying a data signal of the mth light-emitting frame to the signal line, and the first storage unit is used for receiving a data signal of a (m+1)th light-emitting frame; before starting of the (m+1)th light-emitting frame, the first storage unit transmits a data signal of the (m+1)th light-emitting frame to the second storage unit; N and m are positive integers; N is larger than or equal to 2; and m larger than or equal 1 and less than or equal to N-1. Compared with the prior art, the backlight module has the advantages that the flashing phenomenon of the backlight can be improved; the scanning frequency is improved; and the power consumption is saved.

The invention discloses a positioning method and system for an infrared touch screen. The method comprises the following steps: providing an infrared touch screen, a plurality of infrared transmitting pipes and a plurality of infrared receiving pipes, wherein a plurality of left-leaning first oblique lines and right-leaning second oblique lines are formed between the infrared transmitting pipes and corresponding infrared receiving pipes; diagnosing positions of at least two touch notches on the infrared touch screen; recording a plurality of vertical lines and the first oblique lines passing the touch notches; calculating and obtaining a plurality of intersection points of the vertical lines and the first oblique lines; detecting whether all the intersection points shield the second oblique lines or not; confirming that the intersection points are real touch points if the intersection points shield the second oblique lines; calculating and obtaining the coordinate values of the real touch points. According to the invention, sweep time of the infrared transmitting pipes and the infrared receiving pipes is shortened; sweep frequency, response speed and positioning accuracy of the infrared touch screen are improved; stable fluency of positioning and touching of the infrared touch screen is improved.