9 results about "Vertical blanking interval" patented technology

The invention discloses a display device and a display driving method. A time sequence control module judges that a display picture of a current frame of a display panel is one of a light-load display picture and a heavy-load display picture, and when a display picture of a to-be-displayed frame is the other one of the light-load display picture and the heavy-load display picture, the time sequence control module controls the display panel to display the light-load display picture and the heavy-load display picture; and controlling the generated enable signal to have an effective level at a vertical blanking interval between the current frame and the frame to be displayed, so that the power management module adjusts a compensation value applied to the analog power supply voltage according to the effective level of the enable signal at the vertical blanking interval, the voltage offset of the generated analog power supply voltage relative to the reference voltage in at least one of the starting time period and the ending time period of the vertical blanking interval is reduced, so that the stability of the analog power supply voltage in the time period where ripples are easy to generate is improved, and the ripples of the analog power supply voltage are reduced. And the problem of water ripples or crosstalk occurring during display of the display panel is solved.

The invention provides a display panel and a display device.The display panel carries out display based on various display refresh frequencies, the display panel comprises a plurality of pixel units arranged in an array and a driving unit connected with the pixel units, each pixel unit comprises a pixel electrode and a common electrode, and the common electrode is connected with the pixel units. The driving unit is respectively connected with the pixel electrode and the common electrode; wherein the driving unit is used for applying a first voltage signal to the pixel electrode and applying a second voltage signal to the common electrode; in a vertical blanking interval of a frame display period, the first voltage signal and / or the second voltage signal comprise / comprises at least one group of pulse signals, and the number of the pulse signals is determined based on the display refresh frequency of the current frame. The brightness difference during refresh frequency change can be improved, ghosting is eliminated, and the display effect is improved.

The present application proposes a brightness adjustment method and display device for a display panel, which belongs to the technical field of display equipment. The method can obtain the first frequency of the current frame and the second frequency of the next frame respectively by detecting the length of the vertical blank gap area, so that the first target brightness adjustment data corresponding to each sub-area at the first frequency and the second target brightness adjustment data corresponding to each sub-area at the second frequency can be obtained from the brightness adjustment data set obtained in advance. Therefore, the driving voltage of each sub-area can be adjusted according to the first target brightness adjustment data and the second target brightness adjustment data corresponding to each sub-area, so that each sub-area can display the target brightness. The driving voltage applied to each sub-area is adjusted according to the target brightness adjustment data at different frequencies, so that the display brightness of each sub-area at different frequencies is the same, which can solve the problem of flickering of the screen brightness when the frequency is switched.

Embodiments of the present invention disclose an Xwindow graphics display method, apparatus, electronic device, and medium. The method comprises: defining vertical blanking interval (VBLANK) information and a copy flag in a window structure; rendering the window's background buffer and issuing a display request to an X Server; updating a display delay queue based on the display request time; and updating the copy flag value based on the display request time in the display delay queue; copying the window's background buffer to a root window and displaying it on the screen. By adding VBLANK information and a copy flag to identify window refresh status and control copy operations, the VBLANK information is compared with the system's current MSC value to determine the arrival of a new display cycle and update the copy flag value. By reducing copy operations, the rendering frequency is kept consistent with the display frequency, thereby reducing GPU rendering frequency and GPU resource waste.

The invention relates to the technical field of image processing and data acquisition, and discloses a financial bill intelligent identification and archiving method of an embedded hardware terminal, and the method comprises the steps: firstly obtaining a global low-resolution image, and generating an acquisition instruction queue containing heterogeneous ISP parameters; then controlling the image sensor to execute hardware-level asynchronous serialization acquisition by utilizing vertical blanking interval configuration to obtain heterogeneous local image slices; and eliminating view field displacement between the slice and the global image by using gradient domain registration, and executing logic consistency verification on the identified and extracted service data. And if the verification is passed, generating a layered archived file, otherwise, based on the image histogram, generating a correction parameter and triggering hardware feedback recollection. According to the invention, through a heterogeneous acquisition strategy and a business logic closed loop, the problems of high delay of high-resolution acquisition of a mobile terminal and difficult alignment of handheld shooting are effectively solved, and the bill identification accuracy and filing efficiency are significantly improved.

The present application relates to the technical field of display, and discloses a screen scanning method and apparatus, a storage medium, and an electronic device. The method comprises: intermittently performing display scanning during a display interval; performing touch sensing scanning during a vertical blanking interval; and performing electromagnetic touch scanning during the display interval. Therefore, mutual interference among the display scanning, touch sensing scanning, and electromagnetic touch scanning can be avoided.

The present disclosure provides a display control method and its device, electronic device and storage medium. The method includes: obtaining two different frames, each frame time includes a vertical blank gap, the number of the vertical blank gaps in the two different frames is a first number and a second number respectively, the first number is greater than the second number, when the number of the vertical blank gaps is the first number, the liquid crystal molecules in the liquid crystal display screen have a first display refresh rate and a first polarity inversion frequency, when the number of the vertical blank gaps is the second number, the liquid crystal molecules in the liquid crystal display screen have a second display refresh rate and a second polarity inversion frequency, and the first display refresh rate is less than the second display refresh rate. In this way, the solution of this embodiment can reduce the energy consumption and heat dissipation of the driving module by adjusting the polarity inversion frequency of different frames to adapt to the electronic device, thereby increasing the standby time of the electronic device.

Disclosed are systems and techniques for image processing. For example, a computing device can obtain, from an image sensor, a primary image frame of a scene. The computing device can obtain, from the image sensor during an idle time (e.g., a vertical blanking interval (VBI)) of the image sensor, auxiliary image frames of the scene. Each of the auxiliary image frames corresponds to a region of interest in the scene and includes a lower resolution than the primary image frame. The computing device can process the primary image frame and the auxiliary image frames to focus the image sensor based on the region of interest.

The invention relates to a method for operating an environmental sensor (1), wherein exposures of a number h_a of physical lines from pixels of a pixel matrix are started sequentially (S1), and wherein physical exposure results of the h_a physical lines are read out (S2) and taken into account in data processing together with virtual exposure results of a number h-h_a of virtual lines forming a vertical blanking interval, wherein of a total number h processing lines exactly a number N processing lines are exposed simultaneously, of which a number N_a of physical lines are exposed simultaneously, wherein such processing lines that are exposed simultaneously at one time are separated by a number d-1 of unexposed processing lines.where for a minimum number N_a_min of simultaneously exposed physical lines N_a_min = floor(h_a / d) and where for a maximum number N_a_max of simultaneously exposed physical lines N_a_max = ceil(h_a / d), with N_a_min ≤ N_a ≤ N_a_max.,