Light-emitting diode (LED) blackboard based on pressure sensor

Abstract

The invention discloses a light-emitting diode (LED) blackboard based on a pressure sensor. A transparent writing protection layer, an LED displaying layer and a pressure sensor layer are sequentially arranged from outside to inside. The blackboard further comprises a piezoelectric overlapping signal conversion module and a central processing unit. The pressure sensor layer is connected with the central processing unit through the piezoelectric overlapping signal conversion module, and the central processing unit is connected with the LED displaying layer. A pressure signal generated by writing is exerted on the pressure sensor layer under the transfer effects of the transparent writing protection layer and the LED displaying layer sequentially. The pressure sensor layer transmits the collected pressure signal to the piezoelectric overlapping signal conversion module, the piezoelectric overlapping signal conversion module generates a corresponding digital control signal and transmits the digital control signal to the central processing unit, and the central processing unit controls displaying of the LED displaying layer through the digital control signal. The blackboard is convenient to use, capable of displaying written content clearly and solving the light reflecting problem and free of dust pollution. The content can be modified and cleared conveniently and quickly.

Description

technical field [0001] The invention discloses an LED blackboard based on a pressure sensor, and relates to the application technical field of the combination of the pressure sensor and LED technology. Background technique [0002] Blackboard is a kind of requisite traditional teaching aid, and blackboard commonly used in the prior art mainly comprises the traditional blackboard that uses chalk to write and the plastic blackboard that uses water pen to write. The traditional blackboard written with chalk will cause relatively large dust pollution. At the same time, the production and consumption of chalk also cause environmental pollution and waste of resources. And the plastic blackboard that adopts water pen to write, if the interval time after writing is longer then it is difficult to clean up, also easily cause handwriting to be unclear when repeated use. At the same time, these two kinds of blackboards will reflect light when they are in use. It is easy to see the cont...

AI Technical Summary

Problems solved by technology

The traditional blackboard written with chalk will cause relatively large dust pollution. At the same time, the production and consumption of chalk also cause environmental pollution and waste of resources.

The plastic blackboard written with a water pen is difficult to clean if the interval between writing is long, and it is easy to cause unclear handwriting when it is reused.

At the same time, these two kinds of blackboards will reflect light when they are in use. It is easy to see the content on the blackboard because of the reflection of the blackboard on the side of the classroom.

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