ARRANGEMENT AND METHOD IN AN ELECTRONIC DEVICE FOR DETECTING A USER INPUT TO A KEY
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Abstract
A method in an electronic device for detecting a user input to a key of the electronic device associated with a solar cell that may include an input and an output is provided. The key may be transparent and admit input electromagnetic radiation to the solar cell. A change of input radiation into the solar cell may result in a corresponding change of an output signal of the solar cell. The method may include the step of detecting a change of the output signal corresponding to a change in input radiation as a result of light being blocked from being incident on the key (e.g., shadowed), and the step of indicating an input (i.e., activation) of the key associated with the solar cell with the detected output signal change.
24 Citations
37 Claims
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1-17. -17. (canceled)
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18. In an electronic device, a method for detecting a user input of at least one key associated with a solar cell, of the electronic device, having an associated output signal, where a change of input radiation received at the solar cell corresponds to a change in the output signal, the at least one key to transmit input radiation incident upon the at least one key to the solar cell, the method comprising:
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detecting the change in the output signal corresponding to the change in the transmitted input radiation when the input radiation is prevented from being received at least one key; and indicating, based on the detected output signal change, the user input of the at least one key. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. An electronic device comprising:
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at least one key associated with a display of the electronic device; a solar cell associated with the at least one key, the solar cell having an output signal, where a change of input radiation received at the solar cell corresponds to a change in the output signal, the at least one key to transmit input radiation to the solar cell; and a cell monitoring unit to detect the change of the output signal corresponding to the change in the transmitted input radiation when the input radiation is prevented from being received at the at least one key, and indicate, based on the detected output signal change, a user input of the at least one key. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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28-1. The electronic device of claim 28, where the at least one key comprises a plurality of keys, each of the plurality of keys being respectively associated to a particular solar cell, and where the cell monitoring unit is further to separately monitor the output signals of each of the particular solar cells.
Specification