30 results about "Screen tearing" patented technology

The embodiment of the invention relates to a method used for realizing restraint of screen tearing. The method comprises: the backlight is turned on when the power is on so as to output panel signals of an LCD; an electric source module is controlled to supply power to a panel signal processing module after the panel signals are stable, so as to display a start-up picture by a display screen. The embodiment of the invention further relates to a system used for realizing restraint of screen tearing. By adopting the method and the system of the embodiment of the invention, the electrifying time sequence of the display screen can be controlled, namely, the backlight is turned on when the power is on; the panel signals of the LCD are then output; the electric source of the panel signal processing module is turned on after the panel signals are stable so as to supply power to the LCD panel signal processing module and display the picture, thereby effectively restraining 'screen tearing' and improving visual effect and product quality; moreover, an independent electric source module is adopted to supply power to the panel signal processing module, thus the electric source is more stable.

The embodiments of the invention disclose a grid driving circuit and a liquid crystal display apparatus. The grid driving circuit comprises multiple grid driving unit circuits, a clock signal line and a trigger signal line. Each grid driving unit circuit comprises a precharge unit, a stable signal generation unit, a pull-down stable unit, an output unit and a synchronous trigger unit. When a video card sends a new frame of an image to the T-con of a liquid crystal display apparatus, the initial end of the new frame of the image carries vertical synchronization signals, the T-com, after generating trigger signals according to the vertical synchronization signals, providing the trigger signals to the synchronous trigger units, and when the synchronous trigger units receive the trigger signals, control nodes and grid scanning signals which currently travel to a tail-end row are pulled down to low level in a forced mode. The grid driving circuit and the liquid crystal display apparatus can eliminate an image tearing phenomenon and improve the display quality.

The invention relates to a fault clearing method of a display, in particular to a method for detecting screen tearing faults of the display. The specific detecting steps are that row outputting supply voltage is measured by a multimeter, the measurement is confirmed to be changeless after the display turns normal, and then the next step is followed; voltage of three negative poles of a final video and a kinescope is checked to confirm the normalness thereof, the next step is followed in a normal case; grid electrode G1 and accelerator G2 of the kinescope is checked, with respective voltage of -150V and 110V; faults are judged, if the voltage of G1 of -150V reduces with the time increasing and when finally to -60V, screen displaying can be normal as well; if a luminance turn knob is out of control in the case that the voltage of G1 is -150V, a capacitor within the display is judged to be broken. The method of the invention is mainly used for detecting slow start-up speed, screen darkening and letter blurring incurred by overuse of the display and ageing failure of the interior capacitor, thus being capable of leading a maintainer to clear the screen tearing faults of the display accurately.

The invention provides an image display method and device in the technical field of image processing, and can solve the problem of picture tearing caused by asynchronous display of sub-images decodedby decoding end equipment by spliced large-screen equipment. The specific technical scheme comprises the steps of obtaining at least one current to-be-displayed frame image, first identification information of an image source of the current to-be-displayed frame image and frame identification information of the current to-be-displayed frame image; dividing each current to-be-displayed frame imageto generate at least one current sub-image; performing time synchronization on the decoding end equipment of the at least one display by adopting the reference time; generating a timestamp of each current sub-image; and sending each current sub-image, each timestamp, the first identification information and the frame identification information to target decoding end equipment, so that the target decoding end equipment sends the current sub-image to a target display according to the timestamp, the reference time and the frame identification information. The invention is used for realizing picture synchronization and improving image impression experience of a user.

The invention discloses an LED display video transmission method, which relates to the technical field of video data transmission, and is characterized in that main LED display modules and slave LED display modules are arranged on an LED display screen, and a plurality of main LED display modules are cascaded to form a row for data transmission; each master LED display module and at least one slave LED display module are cascaded through the Ethernet to form a column for data transmission; after video source data input from the outside is processed by the transmitting device, one path of video source data is transmitted to the receiving device in the main LED display module at the same level to be processed, and the other path of video source data is transmitted to the transmitting device in the main LED display module at the next level to be processed. According to the method, the video sending function is decentralized, and the stability of the display effect is improved. Meanwhile, delay jitter and line interference of data among the display modules are avoided, and the phenomena of display asynchronization or picture tearing and the like are avoided.

The invention discloses a VPU video decoding output method and system for a Feiteng display card. The method comprises the steps that display equipment is obtained, linkage with the display equipment of the Feiteng display card is completed, buffer management equipment GBM is established, a DMABUF buffer area is established, and a corresponding file descriptor fd is obtained. An fd importing function of an open multimedia acceleration layer (OMX) is used, fd of each DMABUF buffer area is imported into a video coding and decoding unit (VPU) in the GPU for use, the OMX locks the decoded fd by using a callback function and then adds the fd into a display output queue, the GPU obtains the fd from the display output queue and performs rendering output, and the GPU informs the OMX to release the fd after using the fd. According to the invention, the VPU video decoding output optimization of the Feiteng display card can be realized, so that the CPU occupancy rate of the VPU of the Feiteng display card during decoding output is reduced, the performance and efficiency of the system are improved, and picture tearing is prevented.

The invention provides a virtual and real camera picture synchronization method and device and a storage medium, and relates to the technical field of computers, and the method comprises the steps: enabling the motion data of an LED picture, a real camera and a synthesis end virtual camera to access time codes, comparing the three time codes which are received at the same time, and selecting the slowest time code as a reference. The motion data, the real camera picture data and the virtual camera picture data are synthesized in a frame synchronization mode, then values are taken from the cache pools to be synthesized, the slowest time code is selected as a reference to generate the lowest delay, namely, the interval time of performance and final picture seeing, and the time codes as indexes are in one-to-one correspondence with the corresponding data, so that the motion data, the real camera picture data and the virtual camera picture data are synthesized in a frame synchronization mode. Therefore, the problem of picture tearing during real-time synthesis of the virtual camera picture and the real camera picture in the virtual film production is solved, and the real-time performance, the integrity and the picture uniformity of the virtual film production are further improved.

The invention discloses a smart watch picture display control method and system, a smart watch and a medium. According to the method, the rotation degree of the smart watch is obtained; a first pixel matrix of a display picture before the rotation of the smart watch is obtained from the display cache chip; according to the rotation degree, all pixels in the first pixel matrix are rearranged in the display cache chip, and a second pixel matrix is obtained; the second pixel matrix is sent to the screen driving chip through a hardware protocol; and the second pixel matrix is scanned through the screen driving chip according to an original scanning sequence, and a rotated picture is displayed on the smart watch. According to the method, the hardware cost of the screen driving chip can be reduced, the situation of picture tearing during rotation is reduced, and more stable visual experience can be provided. The method can be widely applied to the technical field of smart watches.

The invention discloses a control circuit and a control method for liquid crystal pixels, and the control circuit for the liquid crystal pixels comprises a preset charging module, a second-order programming module and a first-order programming module which are connected in sequence, the method comprises the following steps: firstly, charging a preset charging module; programming the preset charging module through a second-order programming module to enable the voltage of the preset charging module to reach the maintaining voltage required by the liquid crystal screen to display the image; and finally, when the liquid crystal screen displays the current image under the maintaining voltage, the first-order programming module displays the storage electric quantity for the next frame of image. When the current image is displayed, the electric quantity required for displaying the next frame of image is prepared in advance, so that the time is saved through the mode of jointly displaying and storing in advance, and the phenomena of color disorder and picture tearing caused by time delay from the first row to the last row in a grid scanning driving mode of the liquid crystal display are effectively improved.

The invention relates to a synchronous playing method and system and an LED display screen. The synchronous playing method comprises the steps that host equipment generates a video clock through a time code of a video; sending a video clock to all sub-devices; the sub-device calculates the playing moment of the current frame according to the video clock; and the host equipment and the sub-equipment synchronously play the video. Wherein the specific steps of synchronously playing the video by the host equipment and the sub-equipment are as follows: correcting the calculated playing moment of the current frame to the actual playing duration; judging whether the playing moment of the current frame is reached or not; if not, continuing to display the previous frame, and setting a delay value; and if yes, immediately displaying the current frame. According to the method, an external time code generator is not needed during multi-device media playing, the host device generates the video clock through the time code in the video decoding process, the host device and the sub-devices are synchronized, the working process is reasonably configured, and the phenomenon of picture tearing is avoided while the efficiency is improved.