Three technical difficulties of outdoor rotary LED display
Author:shirley Time:2021-07-20 13:34 Browse(944)
Three technical difficulties of outdoor rotary LED display panel
This post was edited by caishida optoelectronics at 18:05, January 3, 2018) G- N7 |. Q0 s0 E; z, G1 H. R, J- r% _ 1 J2 C4 y outdoor rotary LED display screen is a new type of display screen which can realize picture and text display by synchronously controlling the position and lighting state of LED. Because of its novel structure, low cost and 360 view range ° The principle of outdoor rotating LED display is not complex.
its hardware structure is relatively simple, but to make it stable to display the set image or text, caishida optoelectronics thinks that it needs to overcome the following three technical difficulties: first, the principle of the LED display is not complex When the system works, 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 The problem of drag shadow in the horizontal display of the rotating screen is that the rotating screen uses a single column outdoor LED display screen to rotate and scan to realize the cylindrical image display.
this makes the image number display appear sticky in the horizontal direction, forming drag shadow phenomenon.

Three technical difficulties of outdoor rotary LED display

Third, the image number display of the rotating screen is not uniform To solve the problem of insufficient display brightness, the working principle of outdoor rotating LED display determines that compared with ordinary plane outdoor LED display, the time of displaying each column is much less, so the brightness will be greatly reduced.
there is only one column of outdoor rotating LED display.
and this column is driven by the outdoor LED display with constant rotation speed, At the same time, the control circuit synchronously controls the lighting state of the display screen, so that every time the motor rotates a certain angle, the display content of the LED display screen will change once,When rotating to any position, there is a unique display content, that is to say, the outdoor rotating LED display adopts column by column display, and uses mechanical rotation to replace scanning display.
therefore.
in order to make the outdoor rotating LED display have better display effect, the above three problems need to be solved in the design.
1 How to solve the power supply problem of outdoor rotating LED display.
we generally use the brush fixed on the base, the rotating metal guide rail and the metal wheel axle contact to supply power to the system, which is a relatively simple and reliable method.
the design of this paper is to provide a constant 12V DC voltage through the brush.
then the DC-DC chip is converted into 2.5V, 3.3V, 2.5V 2. How to solve the problem of horizontal dragging of the rotating screen.
it is mainly to insert an all black time slot between the two columns of pixels according to the characteristics of the rotating scanning, so as to eliminate the stickiness of the two columns of image display points.
3 In order to solve the problem of insufficient brightness display.
the design of this paper uses four columns of outdoor LED display lights to display each pixel on each rotating screen in turn without increasing the brightness of outdoor LED display lights, so that the brightness will become four times of the original under the condition of constant rotation speed.
this paper is shared from caishida.
the design of this paper is to solve the problem of insufficient brightness display   a( T4 p! K) ?.
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