| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light-emitting device, capable of emitting light from an illuminant such as a light-emitting diode, without absorbing electromotive force generated in a piezoelectric unimorph or a piezoelectric bimorph, even if electric double-layer capacitor charge is zero at the start of device usage in relation to the light-emitting device, capable of emitting light from the illuminant, such as a light emitting diode by charge obtained by charging the electric double-layer capacitor with the electromotive force generated in the piezoelectric element. SOLUTION: Part of the electromotive force, generated in the piezoelectric unimorph or the piezoelectric bimorph allows the illuminant, such as a light- emitting diode to emit light directly, and the electric double-layer capacitor is charged with another part of the electromotive force, so that the electromotive force generated in the piezoelectric unimorph or the piezoelectric bimorph will not be absorbed, even if the electric double-layer capacitor charge is zero at the start of device usage, and the illuminant such as a light-emitting diode is allowed to emit light.</p> |
