Fingerprint Detection with Transparent Cover
First Claim
Patent Images
1. An electronic device comprising:
- a transparent cover;
a light source adjacent to the transparent cover, the light source being configured to inject light into the transparent cover, the transparent cover being configured to guide the light to an interaction at the transparent cover;
a filter disposed along the transparent cover, the filter being configured to selectively allow the light scattered by the interaction to pass through the filter; and
a detector configured to generate a signal indicative of the scattered light allowed through the filter.
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Abstract
An electronic device includes a transparent cover and a light source disposed at an edge of the transparent cover. The light source is configured to inject light into the transparent cover. The transparent cover guides the light until interaction with a fingerprint ridge at the transparent cover. The electronic device further includes a filter disposed along the transparent cover. The filter is configured to selectively allow the light scattered by the fingerprint ridge to pass through the filter. A detector generates a signal indicative of the scattered light allowed through the filter.
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Citations
20 Claims
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1. An electronic device comprising:
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a transparent cover; a light source adjacent to the transparent cover, the light source being configured to inject light into the transparent cover, the transparent cover being configured to guide the light to an interaction at the transparent cover; a filter disposed along the transparent cover, the filter being configured to selectively allow the light scattered by the interaction to pass through the filter; and a detector configured to generate a signal indicative of the scattered light allowed through the filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electronic device comprising:
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a transparent cover having an exposed front face and a rear face opposite the front face; a light source disposed at an edge of the transparent cover, the light source being configured to inject light into the transparent cover, the transparent cover guiding the light until interaction with a fingerprint ridge at the front face of the transparent cover; a filter layer disposed along the rear face of the transparent cover, the filter layer being configured to selectively allow the light scattered by the fingerprint ridge to pass through the filter layer; and a photodetector circuit disposed along the filter layer, the photodetector circuit being configured to generate an output indicative of the fingerprint ridge based on the scattered light allowed through the filter layer. - View Dependent Claims (14, 15, 16)
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17. An electronic device comprising:
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a transparent cover; a touch sensing unit disposed along the transparent cover; a display module disposed along the transparent cover in a display area adjacent a fingerprint sensor area; a light source disposed at an edge of the transparent cover, the light source being configured to inject light into the transparent cover, the transparent cover guiding the light until interaction with a fingerprint ridge at the transparent cover; a filter layer disposed along the transparent cover in the fingerprint sensor area, the filter layer being configured to selectively allow the light scattered by the fingerprint ridge to pass through the filter layer; and a photodetector circuit disposed along the filter layer, the photodetector circuit being configured to generate an output indicative of the fingerprint ridge based on the scattered light allowed through the filter layer; wherein the transparent cover and the touch sensing unit extend across the display area and the fingerprint sensor area. - View Dependent Claims (18, 19, 20)
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Specification