568results about How to "Increase refresh rate" patented technology

A content-based adaptive refresh technique is implemented in an active matrix display system for reducing power consumption. The active matrix display system includes a display panel having multiple rows of display elements arranged as a display matrix. The display panel is coupled to a scan driver and a data driver. The scan driver selects one row at a time to receive data signals, and the data driver provides the data signals. The active matrix display system also includes a timing controller operable to signal the scan driver to cause a first row of the display panel to be not refreshed in a current data frame and a second row of the display panel to be refreshed in the current data frame.

Circuits for programming a circuit with decreased programming time are provided. Such circuits include a storage device such as a capacitor for storing display information and for ensuring a driving device such as a driving transistor drives a light emitting device according to the display information. The present disclosure provides driving schemes for decreasing flickering perceived while displaying video content by introducing idle phases in between in emission phases to increase the effective refresh rate of a display. Driving schemes are also disclosed for reducing the effects of cross-talk by ensuring that programming information is refreshed in a display array that utilizes a driver connected to multiple data lines via a multiplexer.

Methods for road safety enhancement use mobile communication device (MCD) onboard vehicle to share traveling data through inter-vehicle communication broadcasting, perform road hazard warning, enhance road navigation, and provide autonomous road assistance. The methods have a variety of vehicle status data, such as moving data, steering data, or indicator data, obtained through GPS or image capturing and recognition of instrument cluster of vehicle. The image capturing and recognition allows to get speed data from indication of speedometer, indication of left or right turn signal, steering action data corresponding to steering wheel rotation, and light-on indication of system status indicators. To facilitate that, the MCD may be placed in front of steering wheel, and, if applicable, also in coupling with movement of steering wheel. The MCD may perform relative positioning map-matching lane correlation and GPS-update-interval speed positioning to improve data quality regarding vehicle moving status.

A memory (10) includes a variable refresh control circuit (20) for controlling the refresh rate of a memory array (12) using a capacitor for data storage. In one embodiment, each test cell of a plurality of test memory cells (30, 32, 34, and 36) is refreshed at different rates. A monitor circuit (18) is provided for monitoring the stored logic state of each of the plurality of test memory cells, and in response, adjusting the refresh rate of the memory array (12). In another embodiment, a variable refresh control circuit (20′) includes a plurality of test memory cells (70, 72, 74, and 76) that are all refreshed at the same rate but each of the test memory cells (70, 72, 74, and 76) is implemented to have a different charge storage capacity than the other test memory cells. The monitor circuit (18) monitors the stored logic state of each of the plurality of test memory cells (70, 72, 74, and 76), and in response, adjusts a refresh rate of the memory array (12).

An apparatus and method for recording an image on the surface of a 3D object uses a laser projector that scans a light beam over the surface in an image pattern. The projector operates in a template imaging mode and an image recording mode where the beam scans at a speed that in a single pass / scan mode is typically four to five orders of magnitude slower than in the template imaging mode. A layer of a photosensitive material is applied to the surface of the object either partially or fully. Projection in the template imaging mode can guide the applying. The layer is substantially insensitive to ambient light for at least a period of time necessary to perform a desired processing step on the object. The layer has a maximum spectral sensitivity in the vicinity of the wavelength of the laser light beam. In one or multiple passes of the beam over the image pattern operating in the image record mode, the accumulated light energy dose density is sufficient to react the material and record the image.

The invention discloses a plane and barrier detection method based on an RGB-D camera and an attitude sensor, and the method achieves the environmental three-dimensional information recognition with higher resolution, higher refresh rate and higher precision based on the RGB-D camera and the attitude sensor. The method can achieve the recognition of a ground passage, the judgment and early-warning of a ground cavity and various types of barriers and the recognition of scenes of going upstairs and downstairs, and is close to the visual sensing of an environment. Through the cooperation of the attitude sensor, a whole system is more flexible and portable, and the camera does not need to keep a fixed relative position with a user or any other ground reference object. When a visually-impaired person goes out, the camera can be placed at any body part which can photograph a three-dimensional environment. A portable computer or pad compatible with the RGB-D camera can be selected by himself or herself to achieve the same function.

The invention provides an array substrate, a display device and a driving method of the display device, so as to solve the problems that the refresh rate of the charging time of a pixel electrode can not be ensured as the existing liquid crystal display panel is improved at the same time, and the response time of the liquid crystal display panel is insufficient. The array substrate comprises a substrate, gate lines and data lines, wherein the gate lines corresponding to the 2m-th row of pixel units and the gate lines corresponding to the (2m-1)th row of the pixel units receive the same control signal; and each column of the pixel units corresponds to two data lines and the two data lines comprise a first data line and a second data line. By utilizing the technical scheme, the refresh rate of the display device can be improved, and a pixel electrode can be guaranteed to have sufficiently long charging time at the same time, thus the response time of a picture of the display device is sufficiently long and the quality of the picture is ensured.

An angle-responsive sensor, comprising:a radiation detector adapted to detect ionizing radiation;at least one radiation absorbing element arranged to block radiation from reaching said detector in a manner dependent on a relative orientation of a radiation source, said detector and said element, said detector and said element defining an aim for said sensor; andcircuitry coupled to said detector and which generates an output signal which varies as a function of said relative orientation,wherein said detector and said element are arranged to have a working volume of at least 10 cm in depth and having an angular width, such that said signal defines an accuracy of better than 3 mm within one standard deviation, over said working volume.

A display device with a semiconductor layer sequence includes an active region provided for generating radiation and a plurality of pixels. The display device also includes a carrier. The active region is arranged between a first semiconductor layer and a second semiconductor layer. The semiconductor layer sequence includes at least one recess, which extends from a major face of the semiconductor layer sequence facing the carrier through the active region into the first semiconductor layer and is provided for electrical contacting of the first semiconductor layer. The carrier includes a plurality of switches, which are each provided for controlling at least one pixel.

The invention provides a multiple projector rotating screen based 3D display system, including: one rotating screen, driven by motor; an image processing device, decomposes the 3D physical model in the cylindrical coordinate system in a series of multiple angular 2D images and sent to the data processing unit of all projectors; at least two projectors arranged around the rotating screen, synchronously project a 2D image with the corresponding angle on one of the rotating screen, thereby restructured the 3D image similar with that of actual objects. The invention may improve the updating rate, resolution and gray step-scale, based on the current available technical level of software and hardware, the lower cost, high display effect of 3D display device may be manufactured.

Embodiments of the present invention provide for a FFS TFT LCD with a high refresh rate without limiting the aperture of individual pixels. More specifically, embodiments of the invention provide for the use of common bus lines to reduce the effective resistance of the common electrode and to therefore allow for higher refresh rates of the display. Furthermore, the common bus lines can be positioned in such a manner so that they do not further reduce the aperture of the display. More specifically, the common bus lines can be positioned above or below existing elements of the display that are already opaque. Thus, adding the common bus lines need not reduce the aperture. The above can be achieved by, for example, placing the common bus lines above or below existing non-transparent lines, such as gate lines or data lines.

In a system for visualizing a stereoscopic image by displaying separate video images for the left and right eyes, sub-picture data (GRD) is created for the left eye and displayed superimposed on left-eye video data (VDD) as a left-eye sub-picture without change. The right-eye sub-picture (106) is displayed by shifting the horizontal positions at which the sub-picture data created for the left eye is displayed by prescribed widths. For example, the sub picture may include a plurality of objects (GRD-1, GRD-2, . . . , GRD-N); shift widths (108, 110) of the horizontal positions of the left and right ends of the objects are individually set and stored in the sub-picture data for displaying the objects for the right eye. A sub-picture superimposed on a stereoscopic video image can thereby be rendered in the depth direction, and the data size of the sub-picture and the amount of computation required for its display can be reduced.

A novel method and apparatus for controlling the display of a portable electronic device having a user input device and a camera function; the portable electronic device including a photosensor chip having a sensor array of a predetermined number of rows and columns of pixels for converting radiant energy into electronic signals representing an image for display via a viewfinder.; The method comprises selecting via the user input a zoom level and viewfinder resolution for the camera application, and in the event the zoom level is 1x then scaling the predetermined number of rows and columns of pixels to the selected viewfinder resolution and generating an image corresponding thereto; and in the event the zoom level is greater than 1x then cropping a region of interest of the predetermined number of rows and columns of pixels in accordance with the zoom level and then scaling the cropped region of interest in accordance with the viewfinder resolution and generating an image corresponding thereto.

The invention discloses a drive circuit, a drive method and a display method. The drive circuit, the drive method and the display method are used for improving refreshing frequency of scanning signals of the drive circuit. The drive circuit is used for driving pixels on an array substrate to display an image; the array substrate comprises a first display region and a second display region; the circuit comprises m lines of grid scanning lines and n lines of data signal lines which are connected with the pixels of the first display region, m lines of grid scanning lines and n lines of data signal lines which are connected with the pixels of the second display region, a grid drive circuit which is connected with all grid scanning lines, and a first source drive circuit and a second source drive circuit which drive the pixels on the array substrate; and the grid drive circuit outputs scanning signals to 2m grid scanning lines line by line simultaneously, and the first source drive circuit and the second source drive circuit output data signals to the data signal lines which are connected with the first source drive circuit and the second source drive circuit respectively, wherein m and n are positive integers.

A computerized system 40 for locating a device. System 40 includes a sensor module 20 and a CPU 42. A radioactive source 38, associated with the device, produces a signal in the form of radioactive disintegrations. Module 20 includes a radiation detector 22 capable of receiving a signal from source 38 attached to the device. Module 20 produces an output signal 34. CPU 42 receives output signal(s) 34 and translates output 34 into directional information relating to a position of source 38.

The invention discloses an LED drive chip display controlling OS-PWM method, and belongs to the technical field of LED display. The method includes the steps of 1) setting display gray binary data digit N, refreshing multiple 2K, optimizing grades G and N to be positive integers, and K and G to be non-negative integers less than N; 2, dividing that gray data into M-bit high-order data and L-bit low-order data, wherein, M+L=N and M & gt; L, M and L are positive integers; 3, according to that refresh multiple of 2K, interspersing the whole display cycle, totally 2N clock cycles, into 2L * 2K sub-cycles; 4, distributing M bits of high-order data evenly into 2L x 2K sub-cycles according to that refresh multiple 2K and the optimization grade G; 5, uniformly distributing that remaining L-bit low-order data into 2L x 2K sub-cycles according to the refresh multiple 2K and the optimization grade G; 6: according to the number of rows R and the number of channels C displayed by the LEDs, respectively applying step 1 to step 5 for R*C times to generate a PWM control LED display, wherein R and C are positive integers.

The invention discloses a multi-line scanning high-refresh-rate full-color LED driving chip and a driving method, and belongs to the field of full-color LED driving chip design. The multi-line scanning high-refresh-rate full-color LED driving chip comprises a synchronous controller, a shift register, a state register, an SRAM buffer, a gray clock generation module, a driving module, a pre-charging circuit and an analog output module. The gray scale clock generation module is used for carrying out frequency multiplication / frequency division processing on the data clock signal DCLK according to the instruction information so as to generate a gray scale clock signal GCLK for controlling the gray scale. The driving module is used for counting the gray scale clock signal GCLK to obtain gray scale counting corresponding to each row of pixel data, and generating an output waveform of a PWM signal corresponding to each row of pixel data by using N continuous rows of pixel data and the corresponding gray scale counting in each scanning process, so that multi-row scanning is realized. The analog output module is used for receiving the PWM signal and generating constant current to drive the LED lamp bead in cooperation with the pre-charging circuit. According to the chip, the refresh rate can be improved, and more scanning lines can be supported.

The invention provides a laser radar interference immunity enhancing method comprising the following steps: carrying out non-continuous multiple scanning for a random single target point, and carryinglaser fast coding for each time scanned laser signal. The multiple measuring behaviors aiming at each target point are non-continuous under fast scanning conditions, thus ensuring the measuring result high refresh rate and reliability; the laser fast coding is to convert the pulse signals in a single pulse period of the existing pulse laser into continuous and / or discrete subpulses with at leasttwo different pulse intensities and / or pulse widths; a series of subpulses as a whole body in the single pulse period can form a detection signal unit of the single target point emitted by the laser radar. The fast coding method is applied to each measuring time of the single target multiple measures, thus further enhancing the laser radar measuring reliability in each time, reducing the single target measuring frequency on said basis, and further improving the measuring result refresh rate.

The invention provides a peripheral compensation system and method of a pixel matrix and a display system. The peripheral compensation system includes a row scanning driver (200), a compensator (400) and a column driver (300), wherein the column driver (300) includes a display signal generation module (301), and the display signal generation module (301) includes a first digital-to-analog conversion module (311) having a gamma correction function, a second digital-to-analog conversion module (312) and a first analog addition module (313). While performing precise gamma correction on a digital original signal, the peripheral compensation system is simple in structure, and the number of bits of the first digital-to-analog conversion module is small; and the peripheral compensation system can also perform correction operation during display of a display system, thereby greatly increasing the refreshing frequency of compensation information.

The present solution can include a method for handling requests to determine the locations of mobile devices in a subscriber network, such as an IMS based network. The last known location and last time of location update can be stored for each mobile device. A request for a specific mobile device can be received from a location services application. The last time of location update for the specific mobile device can be checked against a current time. If the last update time is current enough, the last known location for the device can be conveyed to the location services application. Information can then be presented on the device that is specific to its last known location.

The invention relates to a high-speed calculation correlated imaging system and method based on a preset modulatable light source.The imaging system comprises the light source, an electro-optical modulator array modulating system, a single-point light intensity detector, a data collecting module and a data synchronizing and processing module; the electro-optical modulator array modulating system is used for performing random binary intensity modulation on light emitted by the light source to form a light field with intensity distributed in a random fluctuation mode in free space; the single-point light intensity detector is used for detecting total light intensity obtained after the light field is reflected or transmitted by a target object to be detected and converting the total light intensity into electric signals related to the total light intensity; the data collecting module is used for obtaining the electric signals and obtaining total light intensity fluctuation information, the data synchronizing and processing module is used for controlling data synchronization between the electro-optical modulator array modulating system and the data collecting module and then conducting correlation calculation to obtain an image of the target object to be detected.The electro-optical modulator array modulating system is used for modulating light, the modulation speed is high, the refreshing frequency effect of the preset light source is improved, the refreshing frequency is at least improved to megahertz order, and imaging result and imaging quality are improved.

The invention discloses a driving circuit and a driving method of a display panel and a display device. The driving method of the display panel comprises the following steps: firstly, determining a compensated gray grade value corresponding to each pixel in pixels of a current line; then, loading a gray grade signal corresponding to the compensated gray grade value into each pixel in the pixels of the current line according to the determined compensated gray grade value corresponding to each pixel in the pixels of the current line; and carrying out gray grade compensation with different degrees on the pixels at the different positions in the display panel and applying gray grade signals with different sizes. Particularly, with regard to the display panel with a large size, a high resolution ratio and a high refresh rate, charging rates on different positions in the display panel of a source electrode driving circuit can keep consistent, so that the uniformity of display brightness of the display panel can be improved; and furthermore, the display quality of the display panel can be improved.

A method for converting a compound data word 10 into a modified data word (12). The compound data word (10) has a plurality of equally weighted thermometer data bits (14) and a plurality of binary weighted data bits (16). The thermometer data bits (14) are repeated in the modified data word (12). In one embodiment, the thermometer data bits (14) are asserted first, then the binary weighted data bits (16), and then the thermometer data bits (14) again, with the second assertion of the thermometer data bits (14) being in reverse order as compared to the first assertion thereof. The weight of the thermometer data bits (14) is optionally changed to keep the relative weighting of the thermometer data bits (14) and the binary weighted data bits (16) unchanged. A display driver circuit (53) in a video display apparatus (50) has a modified data generator (54) for generating the modified data words (12), and a pulse generation and routing circuitry (56) for generating pulses and providing the pulses to a plurality of pixel electrodes (58) of a display (60).

This invention relates to a method for driving a display panel (DP) having pixels (P). The display panel (DP) is driven with a sequence of image frames. The image frames are converted to a drive signal (V2) comprising refresh frames with a refresh frame period (TR) shorter than the image frame period. A pixel (P) of the display panel (DP) is driven with an adapted drive signal having a first polarity during a first group of refresh frame periods, and having a reversed polarity during a subsequent second group of refresh frame periods. The first group and the second group each comprise at least two refresh frame periods.

The invention discloses Kalman filtering, digital phase-locked loop filtering and signal tracking methods and Kalman filtering, digital phase-locked loop filtering and signal tracking devices, and belongs to the field of wireless communication. The signal tracking method comprises the following steps of: processing the received signal to obtain a receiving signal, and extracting a current observed value from the receiving signal, wherein the receiving signal comprises receiving carriers and receiving codes; and judging whether speed, accelerated speed or jerk of a receiver is greater than a preset threshold value, if so, determining that the carrier is positioned in a high dynamic environment, and performing signal tracking by utilizing the Kalman filtering, otherwise, determining that the carrier is positioned in a non-high dynamic environment, and performing signal tracking by utilizing a digital phase-locked loop. The invention also discloses a signal tracking device, a Kalman filtering method, a Kalman filtering device, a digital phase-locked loop filtering method and a digital phase-locked loop filtering device. The provided methods make the receiver adaptively switch a carrier tracking method, reduce the loop error, improve a refresh rate of a positioning result, and fulfill the aim of continuously tracking and locking the signal in a complex dynamic environment.

A bi-stable display (100) is driven by supplying (101) voltage waveforms to pixels (18) of the display (100). It is determined (150), based on information to be displayed (DI) on the display (100) during an image update period (IUP), which pixels (18) have to change their optical state during the image update period (IUP). A sub-area of pixels (WI) is determined (151) which has to be updated during this image update period (IUP). The dimensions of the sub-area (W1) are dynamically determined to cover the pixels (18) which have to change their optical state during this image update period (IUP). The drive circuit (101) is controlled (152) to only address the pixels (18) of the sub-area (WI).

The invention discloses a liquid crystal display device, which comprises a liquid crystal panel circuit, a gate driving circuit, a source driving circuit, a time sequence control circuit, a backlight and a backlight control circuit, wherein the time sequence control circuit is used for outputting a gate driving signal and a source driving signal to the gate driving circuit and the source driving circuit correspondingly and outputting a backlight control signal to the backlight control circuit; the gate driving signal comprises a field synchronizing signal; the backlight control signal comprises a field synchronizing signal; the backlight control circuit is used for generating pulse-width modulation (PWM) signals and outputting the PWM signals to the backlight; and phase differences between the PWM signals and the field synchronizing signal are fixed. The invention also provides a liquid crystal display control method. The method is characterized by comprising the field synchronizing signal for controlling the output of the time sequence control circuit and the PWM signals for controlling the output of the backlight control circuit, so that the phase differences between the field synchronizing signal output by the time sequence control circuit and the PWM signals are fixed. By the liquid crystal display device and the liquid crystal display control method, the shortcoming that the image in the liquid crystal display device glitters is effectively overcome, and the quality of a liquid crystal display product is improved.