The gray level of the LED display in the conference room can also be called the brightness of the LED electronic display. The gray level is also called the midtone. It is mainly used for data transmission and image. There are 16 levels, 32 levels and 64 levels, respectively, in 3 educational methods, through matrix analysis Processing life style The file pixel is processed into 16, 32, 64 levels, which can make the transmitted image more clear, whether it is a single-color two-color or a three-color screen.

Nowadays, there are two ways to control the gray scale of the LED display in the conference room: one is to change the current we flow through, and the other is to adjust the width of the pulse signal. The current change through the led usually allows the led to be about 20 mA. Except for the saturation of the red LED, the gray scale of other LEDs is basically proportional to the current flowing through and the continuous working current. Using the visual inertia of the human eye, grayscale information control is achieved through pulse width adjustment, that is, by periodically changing the light pulse width (that is, the duty cycle). As long as the period of repeated lighting of this problem is not short enough (that is, the refresh rate is high enough), the human eye will feel that the luminous pixels are jittering, because pulse width adjustment is more suitable for Chinese digital technology control, so companies can generally use microcomputers to provide The LED display in the conference room displays the content. Almost all the LED screens need to use pulse width adjustment to control the gray level. The conference room LED display control system is usually transmitted from the main control screen, and then through several parts transmitted on the main control screen.