Outdoor LED rotating screen of the key production process
Recently, the market appeared an outdoor LED rotating screen, this new product appears, immediately by everyone's blitz. So, what are the characteristics of outdoor LED rotating screen, it has what key production process?
Rotary outdoor led display screen is a synchronous control through the light-emitting diode (outdoor led display) location and lighting status to achieve a new display of graphic display, because of its novel structure, low cost, visual 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 display display device only one column, and this column outdoors led display by the constant speed of the outdoor led display led to 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 of the content, that is to say, rotating the outdoor led display screen is displayed in a row, and use The mechanical rotation is used instead of the alternate scan display.
To make the design of the rotating outdoor led display has a better 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 way to the system power supply, 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 article does not continue to increase the brightness of the outdoor led display screen, the use of four outdoor led display lights to rotate each screen on each rotation The brightness, so that the brightness of the same rate of rotation in the case into the original four times.
Rotating the principle of outdoor display display is not complicated, the hardware structure is relatively simple, but to make the rotation of the outdoor led display can be stable display set the image or text, you need to overcome the three technical difficulties:
Rotation screen controls 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.
B. Rotate the screen to show the smear problem horizontally. As the rotating screen with a single outdoor led display rotation scan to achieve a cylindrical image display, which makes the number of points appear in the horizontal appear viscous, the formation of smear phenomenon.
C. To solve the display brightness is insufficient, because the rotation of the outdoor display led electronic screen working principle determines the display compared to ordinary flat outdoor display, display each column of time to much less, so the brightness will be greatly reduced.