Electronic device with power generation function
View Patent ↗The present invention provides an electronic device with a secondary cell which has a simple structure and is capable of extending a continuous operating period by compensating for power consumption through effective utilization of a light source and external light. On a rear face of a casing 201 of a mobile phone, a light source 204 , a conductive key sheet 203 having a plurality of operation keys 206 and a solar battery 202 are layered. Each of the operation keys 206 is exposed outwards through a through-hole 208 of the solar battery 202 and a through-hole 207 of the casing 201 . The key sheet 203 guides the light from the light source 204 and the light from the outside of the casing 201 to the solar battery 202 and guides the light from the light source 204 onto the operation key 206 . The solar battery 202 receives the light from the light source 204 and the outside of the casing 201 through the key sheet 203 and converts the light into electric energy to be charged into a secondary cell.
1. An electronic device comprising:
a light source;
a photoelectric conversion element for receiving light and converting the light into electric energy;
a key sheet for having a plurality of operation keys and guiding the light from the light source and external light into the photoelectric conversion element and guiding the light from the light source onto the operation key; and
a secondary cell for storing electric energy from the photoelectric conversion element,
wherein:
the electronic device includes a casing including a plurality of first through-holes for exposing the plurality of operation keys to a surface side thereof;
the photoelectric conversion element includes a plurality of second through-holes corresponding to the first through-holes and is disposed on a rear face of the casing;
the key sheet is made of a material with light conductivity and is disposed on the rear face of the photoelectric conversion element and the plurality of operation keys protrude to the outside of the casing through the first and second through-holes;
the light source is disposed on a rear face of the key sheet; and
the key sheet guides the light from the light source and the external light from the outside of the casing into the photoelectric conversion element.
2. The electronic device according to claim 1 , wherein an area of an external face of the operation key protruding to the outside of the casing is formed to be larger than the first and the second through-holes.
3. The electronic device according to claim 1 , wherein the light source is a backlight of the operation key.
4. The electronic device according to claim 1 , wherein the light source has translucency and is layered on the photoelectric conversion element.
5. The electronic device according to claim 4 , wherein the photoelectric conversion element is layered on the secondary cell.