Solution to the jitter of light touch switch
Release time：2019-03-18 Clicks： Click
What is the problem of jitter in the process of using the light touch switch? How should we solve it? Let's give you a detailed introduction.
With the continuous improvement of living standards and the development of high requirements of people's quality of life, more and more light-touch switches in our modern life are gradually integrated into the power of science and technology and the factors of science and technology. In our real life, light-touch switches have been gradually applied to real life. The light-touch switches break through the traditional design and tradition in form. Manufacturing mode gives us a new feeling and distinctive style design in form. At the same time, it gives us the most perfect design and manufacturing for science and technology in the internal design, so that the power of science and technology is gradually integrated into the real life, so that the power of science and technology can fully play in real life. I hope more industries can be applied to this product.
Among the various classifications of switches, touching the button switch and the mechanical button are also the characteristics of many products. Do you know the difference between them?
1. The cost of touch button switch is very high, and its life is not absolute.
2. Mechanical keys are used in the semi-automation period. At present, they are usually lightly touched switches controlled by computer boards.
In theory, the scanning frequency of dynamic display of touch button switch can not be less than 25Hz, and in practice, it usually needs more than 30Hz to have a better display effect. It's normal to display when you don't press the button. The display jitters when you press the button because the scanning frequency can meet the display requirement when you don't press the button. After pressing, the scanning frequency can't meet the requirement because of the increase of program and a lot of delay, so the phenomenon of "jitter" appears. The key to solve the problem is how to reduce the running time of the key program to ensure that the scanning program can scan on time. It is suggested that the program of the scanning display part should be placed in the interrupt processing part of the timer, so as to ensure the scanning frequency. In addition, the delay in the program of touching the key processing part of the key switch should be changed to the timing interrupt.