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High-speed rotating LED image display device and display method

A technology of image display and high-speed rotation, which is applied in image communication, static indicators, instruments, etc. It can solve the problems of limited LED display speed and accuracy, low speed of single-chip IO port, and low display accuracy, so as to facilitate data change and display accuracy. Read data, less distortion, good image display effect

Active Publication Date: 2015-11-18
NANJING DSEELAB DIGITAL TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] In the existing technology, the data obtained by the modulus software is usually used to display the LED with a single-chip microcomputer, which has many limitations such as a small amount of stored data and low display accuracy. Due to the low speed of the IO port of the single-chip microcomputer, the LED display is limited. Display speed and accuracy

Method used

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  • High-speed rotating LED image display device and display method
  • High-speed rotating LED image display device and display method
  • High-speed rotating LED image display device and display method

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example

[0069] 1. Image processing

[0070] Such as Figure 4 As shown, it is the unprocessed picture of this example. The picture is read by the imread function of matlab, and the length of the picture is calculated to be 329 and the width is 328. Therefore, the radius of the circle is 163, and the radius is made in this picture in turn. Take the smallest circle and find its center (164, 163). We can divide this circle into 256 fixed parts, and divide each of them into 80 lights to display, and calculate the RGB corresponding to the 256×80 coordinate points in turn through the coordinates of the found center point. Data points, and store the RGB data points into the SD card through the fprint function. The image processed by Matlab is as follows Figure 5 shown.

[0071] 2. Reading data in SD:

[0072]Use the SPI of STM32 to communicate with the driver chip CH376 of the SD card. CH376 is a file management control chip, which is used for the single-chip system to read and write f...

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Abstract

The present invention discloses a high-speed rotating LED image display device and display method. The display device comprises an LED stick, a motor, a photoelectric geminate transistor, an SD card, an STM32 controller, a picture processing unit and an FPGA unit, wherein one end of the LED stick is fixedly connected with a drive end of the motor; the picture processing unit comprises a picture reading module, a rounding module and a coordinate correspondence module; and the FPGA unit comprises an SDRAM, an SDRAM data read-write module, an SD card data read-write module and an LED display control module. The LED rotating display rate and definition are high, and images can be well displayed.

Description

technical field [0001] The invention relates to a high-speed rotating LED image display, which belongs to the series of intelligent hardware. Background technique [0002] How to make a column of lights rotate to feel like a stable word displayed in the air? First of all, let's analyze the human eyes. In fact, the human eyes are very easy to deceive. Just let the motor scan faster. In fact, the naked eye will not see the flicker when it is above 24 frames per second, so it is necessary to ensure the motor. The speed can rotate more than 24 times per second, so that the human eyes feel that the rotating characters are very stable and clearly displayed in the air. The rotating LED turns into a circle, so a sensor is needed to judge the starting position. Some people use a Hall sensor, and some use an infrared pairing tube. It is cheaper to use an infrared pairing tube, and it is easy to implement. This starting point detection is very important, and the single-chip microcomp...

Claims

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Application Information

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IPC IPC(8): H04N5/262G09G3/32
Inventor 周全黄泽宇
Owner NANJING DSEELAB DIGITAL TECH CO LTD
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