A microfluidic liquid automatic color-changing glasses liquid filling device based on piezoelectric drive

Abstract

The invention provides a microfluidic liquid automatic photochromic spectacles charging device based on piezoelectric driving. The device comprises a microprocessor which is connected with a power supply module, wherein the power supply module is connected with a piezoelectric element which is connected with a pump membrane, the pump membrane is arranged on a pump cavity, one end of the pump cavity is communicated with an inlet, the inlet is communicated with a liquid storage cavity, an inlet microvalve is arranged between the inlet and the pump cavity and connected with the power supply module, the other end of the pump cavity is communicated with an outlet, the outlet is communicated with a fluid flow pulse reducing element which is communicated with a photochromic spectacle lens, and anoutlet microvalve is arranged between the outlet and the pump cavity and connected with the power supply module. The device is simple in structure, small in size, comfortable to wear and long in service life, can realize circulation of a colored liquid between the photochromic spectacle lens and the liquid storage cavity, and completes the automatic, fast and uniform color changing function.

Description

technical field [0001] The invention relates to the technical field of color-changing glasses, in particular to a microfluidic liquid automatic color-changing glasses liquid filling device based on piezoelectric drive. Background technique [0002] At present, the liquid filling methods for microfluidic color-changing glasses mainly include manual-driven liquid filling, thermopneumatic-driven micro-pump liquid filling, valveless piezoelectric-driven micro-pump liquid filling, and shape-memory alloy-driven micro-pump liquid filling. However, due to the fact that the manual-driven liquid filling method is not convenient for manual direct operation in actual use, the flexibility and controllability are poor; the thermopneumatic-driven micro-pump liquid filling method has a low expansion rate of the gas, and the amount of liquid output by the pump body is small , so it is only suitable for small color-changing structures, and the rapidity is poor; the system structure of the val...

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Problems solved by technology

[0003] Aiming at the technical problems of the existing microfluidic liquid automatic color-changing glasses such as slow discoloration speed, uneven discoloration, short life of the liquid filling device, large volume, and difficulty in integration, the present invention proposes a microfluidic liquid automatic discoloration lens based on piezoelectric drive. The liquid filling device for photochromic glasses can realize the circulation of colored liquid between the lens of photochromic glasses and the liquid storage chamber, and complete the automatic, fast and uniform color changing function. It has a simple structure and small size, which can reach the size of millimeters without affecting the photochromic glasses. The overall volume is comfortable to wear, and the high elastic polydimethylsiloxane (PDMS) organic material is used to prolong the service life

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