Intelligent LED control system and method

Abstract

This invention relates to an intelligent type LED controlling system, which comprises an image signal output unit, an image processor, a mini program controlling unit, a display device, a light-emitting diode circuit and a LED guiding light; wherein the mini program controlling unit comprises a CPU, a impulse-width modulation pin, a timer and a memory; said CPU is connected with the timer, memory and the impulse-width modulation pin, used for controlling each unit and generating PWM wave with some PWM cycle numbers according to the image signal condition; the timer is based on the clock cycle, and the memory will store the cycle number of the PWM wave and the controlling program. The invention also provides a controlling method of the intelligent type LED, which can prevent the disturbance to eyes.

Description

【Technical field】 [0001] The invention relates to a light-emitting diode (LED) based on an MCU microcontroller, in particular to a system and method for changing the brightness of an LED indicator light by using a pulse width modulation method (PWM). 【Background technique】 [0002] General electronic equipment, such as televisions, computers, etc., all use LEDs (Low Emitting Diode) as their working status indicators. The LED indicator light is used for the power state of the electronic equipment, such as the LED indicator light is on when the power is turned on, and the LED indicator light is off after the power is turned off. At present, there are mainly methods for controlling the brightness of LEDs: current control method, which changes the brightness by changing the current flowing through the LED. In this method, each pixel needs a controllable current source, and its disadvantage is that the circuit is complicated and the cost is high. PWM (Pulse-Width Modulation) is...

AI Technical Summary

Problems solved by technology

However, although the aforementioned plurality of indicator lights can indicate various working states of the electronic equipment, it virtually increases the manufacturing cost of the electronic equipment.

The higher the manufacturing cost of electronic equipment, the more unfavorable it is for electronic equipment manufacturers

However, when using one LED light to indicate different working states, use the flashing method to directly turn off and on the LED light within the same time interval, and the light and shade changes too much, which makes people's eyes uncomfortable

At the same time, in the conventional technology, the LED control still has the following disadvantages: After the image signal is output, the brightness of the LED light still maintains the maximum brightness display, which affects the normal work of the user, increases labor consumption, and shortens the life of the LED light.

Images