Rotating the outdoor LED display The display is a new type of display that synchronously controls the position and lighting of the light-emitting diodes (outdoor LED display), because of its novel structure, low cost, visible range of 360 ° And has been rapid development, the core technology lies in the precise control of outdoor LED display position and light state synchronization. Rotating outdoor LED display device only one column, and this column outdoor LED display by the constant speed of the outdoor LED display driven by the rotation, while the control circuit on the outdoor LED display lighting state synchronization control, so that the motor every Turn a certain angle, this column outdoors LED display display to change once, in rotation to any one location has a unique display, that is to say, rotating outdoor LED display screen is displayed in a row, and use The mechanical rotation is used instead of the alternate scan display.
Rotating the outdoor LED display principle is not complicated, the hardware structure is relatively simple, but to make the outdoor LED display can be stable display of the set of images or text, you need to overcome the three technical difficulties:
1. Rotate the screen to control the power supply of the control circuit. In the system work, the control circuit with the motor rotor rotation, so to the rotation of the control circuit and outdoor LED display to provide a stable power supply has a certain degree of difficulty.
2. Rotate the screen to show the smear problem horizontally. As the rotating screen with a single outdoor LED display rotating scan to achieve the cylindrical image display, which makes the number of points in the horizontal display appears viscous, the formation of smear phenomenon.
3. To solve the display brightness is insufficient, because the rotation of the outdoor LED display electronic screen works determine the ordinary flat outdoor LED display compared to the display of each column of time to be much less, so the brightness will be greatly reduced.
To make the design of the rotating outdoor LED display has a good display, you need to solve these three problems in the design. For the rotation of the outdoor LED display power supply, the use of fixed at the base of the brush and the rotating metal rail or metal wheel contact to the way the power supply system is a relatively simple and reliable method. The design of this paper is to provide a constant 12V DC voltage through the brush, then converted by the DC-DC chip to 2.5V, 3.3V, 5V and other voltage to maintain the control system. To solve the horizontal screen of the rotating screen, mainly based on the characteristics of the rotation scan, between the two pixels in the insertion of a black slot, so you can eliminate the two columns show the sticky sense of color. In order to solve the problem of insufficient brightness display, the design of this paper does not continue to increase the brightness of the outdoor LED display screen, the use of four outdoor LED display lights to rotate each display on each rotation screen The brightness, so that the brightness of the same rate of rotation in the case into the original four times.