| 摘要 |
According to the input device of the present invention, phase-difference plate ( 11 ) with ¼ wavelength is disposed on the top surface of upper substrate ( 1 ) of touch panel ( 12 ). As a result of passing through phase-difference plate ( 11 ), lamplight 9 a that illuminates LCD element ( 8 ) goes outside as outgoing-light 9 c with a phase-shift of ¼ wavelength. With the structure above, a user wearing polarized sunglasses-even if they have an absorption axis in a direction the same as that of lamplight 9 a-can easily recognize the displays shown by LCD element ( 8 ) on the back surface of touch panel ( 12 ). The structure offers a user-friendly input device with good visibility of LCD element ( 8 ).
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