Fan screen display method and system based on SOC-FPGA

Abstract

The invention discloses a fan screen display method and system based on an SOC-FPGA. The method comprises the following steps that an SOC chip decodes video data to be displayed and then sends the decoded video data to an FPGA chip at an N-frame refresh rate; the FPGA chip writes data of odd-numbered frames and stores the data in an SRAM module, the data of the next odd-numbered frame covers the data of the previous odd-numbered frame, meanwhile, writing of the data of the even-numbered frames is abandoned, an LED light bar is driven and refreshed in the time period of abandoning writing of the data of the even-numbered frames, and the FPGA chip drives and refreshes the LED light bar once every time the LED light bar rotates excessively; the distance between a lamp bead on the LED light bar and a rotation center is R, polar coordinates X = RcosA, Y = RsinA, the FPGA chip obtains coordinate values of all X and Y, and finally the LED light bar is driven to display a video. According to the invention, plane coordinates are converted into polar coordinates through the FPGA chip, and the LED is driven to display, so that the effect of real-time video display is achieved.

Description

technical field [0001] The present invention relates to the technical field of fan screen display, in particular to a fan screen display method and system based on SOC-FPGA. Background technique [0002] When the object is moving fast, when the image seen by the human eye disappears, the human eye can still retain the image of the image for about 0.1-0.4 seconds. This phenomenon is called the phenomenon of persistence of vision. When the human eye looks at an object, it forms an image on the retina, and it is input to the human brain by the optic nerve to feel the image of the object. But when the object is removed, the optic nerve's impression of the object will not disappear immediately, but will last for 0.1-0.4 seconds. This property of the human eye is called "persistence of vision of the eye". Similarly, the fan screen also uses the persistence of vision effect to display 3D images. [0003] The fan screen display system in the prior art usually converts the video da...

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