| 摘要 |
A multiple light sensor comprises: a piezoelectric material; a first and second sensing membranes separately arranged on the piezoelectric material from each other, and changing a propagation speed of an elastic wave which is propagated through the piezoelectric material by individually receiving ultraviolet rays and visible rays; and a first and second elastic wave output portions, arranged on the piezoelectric material to be individually corresponded to the first and second sensing membranes, and individually generating an electric signal based on the changed elastic wave. Accordingly, the multiple light sensor can measure an intensity of the ultraviolet rays and the visible rays with a single sensor by detecting a change of a frequency, and secure price competitiveness by measuring the frequency change of the elastic wave by using a zinc oxide (ZnO), gallium nitride (GaN), or cadmium sulfide (CdS) nanoparticle. |
