Touch panel and electronic device
First Claim
1. A touch panel, comprising:
- a pair of substrates opposing each other and having a predetermined spacing therebetween;
a pair of transparent electrodes having a respectively predetermined pattern, each of the transparent electrodes being formed on an inner surface of each of the pair of substrates; and
a plurality of projections formed on the surface of at least one of the pair of transparent electrodes, the projections being formed to have a substantially periodical pitch that is shorter than any wavelength of visible light.
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Accused Products
Abstract
The present invention provides a touch panel having pluralities of projections, each of the projections having a predetermined shape, formed on inner surfaces of a lower substrate and an upper substrate, respectively. The projections being formed in at least two directions with a substantially periodical pitch that is shorter than any wavelength of visible light. The touch panel can also include a lower transparent electrode and an upper transparent electrode formed over the inner surfaces of the lower substrate and the upper substrate having the pluralities of projections, respectively. The cross-sectional area of each of the projections parallel to the outer surface of the lower substrate is configured to decrease continuously from bottom to top of the projection. The same applies to the combination of each of the projections, the bottom and a top thereof, and the upper substrate. Accordingly, this structure reduces the light reflection and diffraction at the boundary between an air space and the transparent electrode, thereby providing a resistive contact-type touch panel or a electrostatic capacitive coupling-type touch panel having high light transmittance.
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Citations
16 Claims
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1. A touch panel, comprising:
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a pair of substrates opposing each other and having a predetermined spacing therebetween;
a pair of transparent electrodes having a respectively predetermined pattern, each of the transparent electrodes being formed on an inner surface of each of the pair of substrates; and
a plurality of projections formed on the surface of at least one of the pair of transparent electrodes, the projections being formed to have a substantially periodical pitch that is shorter than any wavelength of visible light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An electronic device including a touch panel, comprising:
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a lower substrate;
a flexible input substrate opposing the lower substrate and having a predetermined spacing therebetween;
a lower transparent electrode having a predetermined pattern formed on the inner surface of the lower substrate;
an input transparent electrode having a predetermined pattern formed on an inner surface of the input substrate so as to oppose the lower transparent electrode with a predetermined spacing therebetween; and
a plurality of projections formed on a surface of at least one of the lower transparent electrode and the input transparent electrode having a substantially periodical pitch that is shorter than any wavelength of visible light.
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Specification