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0 The rotating outdoor led display screen is a new type of display screen that realizes graphic display by synchronously controlling the position and lighting state of light-emitting diodes (outdoor led display screens). Because of its novel structure, low cost, and a visual range of 360° It has been developed rapidly, and its core technology is to precisely control the synchronization of the position of the outdoor LED display and the luminous state. The display device of the rotating outdoor led display has only one column, and this column of outdoor led display is rotated by the outdoor led display with constant speed. Turning a certain angle, the display content of this column of outdoor led display will change once, and there will be a unique display content at any position when it is rotated, that is to say, the rotating outdoor led display screen is displayed column by column, and adopts A mechanical rotation is used instead of a scanning display.
The principle of the rotating outdoor led display is not complicated, and its hardware structure is relatively simple, but to make the rotating outdoor LED Curtain for Outdoor Media Façade display able to stably display the set image or text, three technical difficulties need to be overcome:
a. The rotating screen controls the power supply of the control circuit. When the system is working, the control circuit rotates with the rotor of the motor, so it is difficult to provide a stable power supply for the rotating control circuit and outdoor LED display.
b. There is a problem of smearing in the horizontal display on the rotating screen. Since the rotating screen adopts a single-row outdoor LED display screen to rotate and scan to realize cylindrical image display, this makes the pixel display stick in the horizontal direction, forming a smear phenomenon.
c. Solve the problem of insufficient display brightness. Due to the working principle of the electronic screen of the rotating outdoor LED display, compared with the ordinary flat outdoor LED display, it takes much less time to display each column, so the brightness will also be greatly reduced.
In order to make the designed rotating outdoor LED display screen have a good display effect, these three problems need to be solved in the design. For the power supply of the rotating outdoor LED display, it is a relatively simple and reliable method to supply power to the system by contacting the brush plate fixed on the base and the rotating metal guide rail or metal wheel shaft. The design of this article is to provide a constant 12V DC voltage through the brush, and then convert it into 2.5V, 3.3V, 5V and other voltages by the DC-DC chip to maintain the control system. To solve the horizontal smear of the rotating screen, mainly according to the characteristics of rotating scanning, insert a black time gap between the two columns of pixels, so as to eliminate the stickiness of the two columns of image display points. To solve the problem of insufficient brightness display, the design of this article uses four columns of outdoor LED display lights to display each image on each rotating screen in turn without increasing the brightness of the outdoor LED display lights. prime point so that the brightness is quadrupled at the same rotation rate.
