Video controller

Abstract

The invention relates to a video controller. The video controller comprises a programmable logic device, a video processor chip, a microprocessor, a display screen used for pre-supervision and a dynamic random access memory, which are electrically connected to the programmable logic device, and a display screen used for human-machine interaction, which is electrically connected to the microprocessor, wherein the programmable logic device is used for selecting a to-be-processed video source for the video processor chip according to a human-machine interaction instruction from the microprocessor, selecting a pre-supervision video source for the display screen used for pre-supervision and being combined with the dynamic random access memory to process the selected pre-supervision video source to be displayed on the display screen used for pre-supervision. The video controller with the pre-supervision function, which is provided by the invention, has the advantages of simplicity in operation, convenience for use, high cost performance and convenience for carrying and storage, so that the condition that the video source is switched blindly to be unable to know whether the switched target video source is normal or not can be prevented, and a user can know fairly well when switching the video source.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a video controller. Background technique [0002] In the actual application of LED display, it is often necessary to display multiple video sources on the LED display, or to switch to video source B in the middle of playing video source A. It was found that the status of the video source was abnormal, which caused the LED display to display not what the user wanted or expected. Therefore, in order to ensure that the desired effect can be achieved after switching, it is necessary to confirm the status and content of the target video source to be switched conveniently and quickly before switching. [0003] figure 1 It is a block diagram of an existing video controller. Such as figure 1 As shown, the video controller 10 includes a video processor chip 11 such as an STDP8028 chip, an MCU (Microcontroller Unit, single-chip microcomputer) 13 and a liquid crystal screen for human-c...

AI Technical Summary

Problems solved by technology

from figure 1 It can be seen from the above that the video controller 10 has no preview function, so in some occasions, there is no guarantee for customers whether the video source switching is normal, and it is difficult to meet customer needs

[0004] Therefore, in practical applications, in order to avoid blind switching of video source switching without knowing whether the switching target video source is normal and to know what to do when switching, such as figure 2 As shown, the video controller 10 is externally connected with a preview device 31 and a preview monitor 33 (such as a liquid crystal display) to realize the preview function. However, although this solution can realize the preview function, it needs an additional preview device and a preview monitor. monitor, it is inconvenient to carry and store, and increases the cost of the entire product itself and the cost of transportation and storage

Images