Display device based on surface acoustic wave technology and method thereof

Abstract

The invention discloses a display device based on a surface acoustic wave technology and a method thereof. The display device comprises at least one display component. The display component comprises an elastic piezoelectric substrate; a cavity which is arranged on the elastic piezoelectric substrate, wherein fluid containing colored particles is filled in the cavity; multiple interdigital electrodes which are arranged on the elastic piezoelectric substrate and positioned at the lateral part of the cavity, wherein the interdigital electrodes are symmetrically arranged at the lateral part of the cavity; and a control system which is used for applying radio frequency electric signals to the interdigital electrodes. According to the display method, a light source is not required to be additionally arranged, and the display method can be realized by means of environment light. The colored particles are aggregated and dispersed by the effect of surface acoustic wave so that the objective of color change and gray display can be achieved. Besides, response time is short, response speed is high and limitation of the shape and the material type of the particles is low.

Description

Technical field [0001] The present invention relates to a display technology based on particle aggregation and dispersion, and in particular to a display device and method based on surface acoustic wave technology for particle aggregation and dispersion. Background technique [0002] Surface acoustic wave technology is a cross-technology that integrates electronics and acoustics developed in the 1960s. The wavelength of surface acoustic wave is very short, and the working frequency is as high as 30-3000MHz. Compared with the slower propagation speed of electromagnetic wave, it spreads at 3000-45000m / s on the surface of elastic material, so it is easy to collect and process. As a mechanical wave, surface acoustic wave has a higher The electromagnetic wave has strong anti-interference and anti-radiation capabilities; and the production process of the acoustic-electric transducer device that generates the surface acoustic wave is compatible with the semiconductor production process,...

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Problems solved by technology

[0004] However, this method has relatively high requirements on particle size, charge, density, etc., which limits the types of particles that can be used for electrophoretic display, and it is difficult to achieve high-brightness color and video speed.

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