Shenzhen Big Wheat Technology Co., Ltd. focuses on display product development, manufacturing and sales. The company has bicycle hot wheels and 3D advertising machines. Two series of products, the products are sold at home and abroad, the sales system is perfect, the quality is stable and reliable, and the carrying and installation is convenient. The independent design and R&D trademark patents are clear and clear. The following is to share with us rotating display new technology, interested friends to see!
The outdoor rotary LED display is a new type of display that realizes graphic display by synchronously controlling the position and lighting state of the LED. Because of its novel structure and low cost, the visible range is 360°. It has developed rapidly, and its core technology is to precisely control the synchronization of the position of the display screen and the state of illumination.
The principle of outdoor rotating LED display is not complicated, and its hardware structure is relatively simple, but to enable it to display the set image or text stably, Cai Shida Optoelectronics believes that it is necessary to overcome the following three Technical Difficulties:
First, power supply for rotating screen control circuit
When the system is working, the control circuit rotates with the rotor of the motor, thus giving the rotating control circuit and outdoor LED The display provides a stable power supply with certain difficulty.
Second, rotating screen horizontal display smear problem
Since the rotating screen uses a single-column outdoor LED display rotation scan to achieve cylindrical image display, which makes the image point display in landscape Viscous on the surface, forming a smear phenomenon.
Third, solve the lack of display brightness
Because the working principle of the outdoor rotating LED display determines the time of each column is much less than that of the ordinary flat outdoor LED display. Therefore, the brightness will be greatly reduced.
The display device of the outdoor rotating LED display has only one column, and this column is rotated by the outdoor LED display with constant rotation speed, and the control circuit controls the lighting state of the display screen synchronously. Each time the motor rotates at a certain angle, the display content of this column of LED display changes once, and there is a unique display content when rotated to any position, that is, the outdoor rotating LED display is displayed column by column, and adopts Mechanical rotation is used instead of the scan display.
Therefore, in order to make the designed outdoor rotating LED display have better display effect, it is necessary to solve these three problems in design.
1. How to solve the problem of power supply for outdoor rotating LED display. We generally use the brush plate fixed on the base and the rotating metal rail and the metal wheel shaft to supply power to the system. It is relatively simple and reliable. Methods. The design of this paper is to provide a constant 12V DC voltage through the brush, and then convert the DC-DC chip into 2.5V, 3.3V, 5V and other voltages to maintain the control system.
2, how to solve the horizontal smear problem of the rotating screen, mainly according to the characteristics of the rotating scan, insert a full black time slot between the two columns of pixels, thus eliminating the two columns of image display points Sticky feeling.
3, in order to solve the problem of insufficient brightness display, the design of this article does not continue to increase the brightness of outdoor LED display lights, using four columns of outdoor LED display lights to rotate each display Each pixel on the rotating screen, so that the brightness will be four times the original rotation rate.
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