Optical sensor for integration in a display
First Claim
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1. An optical sensor for imaging a biometric input object on a sensing region, comprising:
- a transparent layer having a first side and a second side opposite the first side;
a first set of apertures disposed above the first side of the transparent layer;
a reflective layer disposed below the second side of the transparent layer configured to receive light transmitted through the first set of apertures and to reflect the received light; and
a plurality of detector elements positioned to detect the reflected light, wherein the plurality of detector elements have a top side facing the sensing region and an underside opposite to the sensing region, wherein the plurality of detector elements are configured to detect the reflected light from the underside opposite to the sensing region.
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Abstract
Systems and methods for optical imaging are disclosed. An optical sensor for imaging a biometric input object on a sensing region includes a transparent layer having a first side and a second side opposite the first side; a first set of apertures disposed above the first side of the transparent layer; a reflective layer disposed below the second side of transparent layer configured to receive light transmitted through the first set of apertures and to reflect the received light; and a plurality of detector elements positioned to detect the reflected light.
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Citations
23 Claims
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1. An optical sensor for imaging a biometric input object on a sensing region, comprising:
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a transparent layer having a first side and a second side opposite the first side; a first set of apertures disposed above the first side of the transparent layer; a reflective layer disposed below the second side of the transparent layer configured to receive light transmitted through the first set of apertures and to reflect the received light; and a plurality of detector elements positioned to detect the reflected light, wherein the plurality of detector elements have a top side facing the sensing region and an underside opposite to the sensing region, wherein the plurality of detector elements are configured to detect the reflected light from the underside opposite to the sensing region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A display for imaging a biometric input object, comprising:
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a set of display pixels; a light blocking layer having a first set of apertures; a transparent layer positioned below the display pixels and the first set of apertures; a reflective layer positioned below the transparent layer configured to receive light transmitted through the first set of apertures and to reflect the received light; and a set of detector elements positioned to detect the reflected light. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for making an optical fingerprint sensor, comprising:
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forming a light blocking layer above a first side of a first transparent layer, the light blocking layer having a first set of apertures configured to permit transmission of light therethrough; forming a reflective layer below a second side of the first transparent layer opposite to the first side of the first transparent layer, the reflective layer positioned to reflect the light transmitted through the first set of apertures; and forming a detector layer having a plurality of detector elements positioned to receive the light transmitted through the first set of apertures and reflected from the reflective layer, wherein forming the reflective layer comprises forming a set of discrete mirrored surfaces and a light absorbing material in areas between the discrete mirrored surfaces, wherein each of the discrete mirrored surfaces is positioned to receive light transmitted through a corresponding aperture in the first set of apertures. - View Dependent Claims (20, 21, 22, 23)
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Specification