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How to solve the color difference of the led display?

by：Toponetech 2021-05-15

Abstract: First, it is to change the current flowing through the LED. Generally, the LED tube allows continuous working current to be about 20 mA. Except for the saturation of the red LED, the brightness of other LEDs is basically proportional to the current flowing; Second, the use of people Eye’s visual inertia, use pulse width modulation method to achieve gray control, that is, periodically change the light pulse width. First, change the current flowing through the LED. Generally, LED tubes allow continuous working current of about 20 mA, except for red LEDs. In addition to the saturation phenomenon, the brightness of other LEDs is basically proportional to the current flowing; 2. Using the visual inertia of the human eye, the pulse width modulation method is used to achieve gray scale control, which is to periodically change the light pulse width (that is, the duty cycle). As long as the period of repeated lighting is short enough (that is, the refresh frequency is high enough), the human eye will not feel that the light-emitting pixels are shaking. Because pulse width modulation is more suitable for digital control, today when microcomputers are commonly used to provide and touch display content, almost all LED electronic displays use pulse width modulation to control gray levels. LED unit board LED full color display LED module wholesale
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