Electronic device, display, image processing apparatus and electronic calculating apparatus

An electronic device comprising an operation panel including:

• a display part capable of electrically and magnetically changing a display region and of displaying a display content displayed in the display region;
• a solar cell part that transmits light in a visible light region;
• and
• an input part that detects whether or not any part of the display region is manipulated, and that transmits light in a visible light region, wherein
• the solar cell part and the input part are disposed on a display surface side of the display part in such a manner to form layers, and
• electric power generated by the solar cell part allows at least one of changing of what is displayed in the display part and detecting of a manipulation of the input part to be performed, further comprising:
• a power accumulation part that accumulates an electric power generated by the solar cell part;
• a first power supply switch that stops and blocks supply of the electric power from the solar cell part to the power accumulation part;
• a second power supply switch that stops and blocks supply of an electric power from a main unit provided with the electronic device to the power accumulation part;
• and
• a control part that functions as a power detection part detecting a power accumulation state and a power consumption state of the power accumulation part, and controls the first power supply switch and the second power supply switch on the basis of a result of the detection, wherein
• the control part sets only the first power supply switch in an conducting state when an electric power of the power accumulation part is large enough to operate the operation panel,
• the control part sets also the second power supply switch in an conducting state when the electric power of the power accumulation part is not large enough to operate the operation panel, and
• the control part sets both the first and second power supply switches in a blocking state when the electric power of the power accumulation part is large enough to operate the operation panel and power consumption is low.

A display having a top surface exposed to a user, comprising:

• a display part capable of electrically and magnetically changing a display region and of displaying a display content displayed in the display region to the user through a display surface of the display part;
• a solar cell part that transmits light in a visible light region;
• a power accumulation part that accumulates an electric power generated by the solar cell part;
• an input part that detects whether or not any part of the display region in the display part is manipulated by an operator;
• and
• a display control part that detects the manipulation of the input part and changes a display state of the display part on the basis of display state information, wherein
• the solar cell part is disposed on a display surface side of the display part and directly over the display part, such that the solar cell part is positioned between the display part and the top surface, and
• electric power of the power accumulation part is used to operate the display control part.

A display having a top surface exposed to a user, comprising:

• a display part capable of electrically and magnetically changing a display region and of displaying a display content displayed in the display region to the user through a display surface of the display part;
• a solar cell part that transmits light in a visible light region;
• a power accumulation part that accumulates an electric power generated by the solar cell part;
• an input part that detects whether or not any part of the display region in the display unit is manipulated by an operator, and that transmits light in a visible light region;
• and
• a display control part that detects the manipulation of the input part and changes a display state of the display part on the basis of display state information, wherein
• the display part, solar cell part and input part form layers in which the solar cell part and the input part are disposed on a display surface side of the display part and directly over the display part, such that the layers comprised of the solar cell part and the input part are positioned between the display part and the top surface, and
• electric power of the power accumulation part is used to operate the display control part.