FINGERPRINT RECOGNITION SENSOR AND PORTABLE DISPLAY DEVICE HAVING THE SAME
First Claim
1. A fingerprint recognition sensor comprising:
- a light source positioned while being spaced apart on one surface of the substrate and irradiating light toward the substrate;
a light direction switching layer positioned between the substrate and the light source, having a thickness-direction cross-section having a right-angled triangular shape, and including multiple protrusions constituted by a first surface in which the light irradiated from the light source is incident and refracted, a second surface contacting the one surface of the substrate, in which the refracted light is transmitted toward the substrate, and a third surface vertical to the one surface of the substrate;
a cover layer spaced apart from the other surface of the substrate and facing the substrate;
multiple sensor pixels defined by multiple scan lines and multiple data readout lines on the other surface of the substrate and positioned between the substrate and the cover layer; and
multiple photo sensors positioned in the respective sensor pixels and sensing the light transmitted from the light direction switching layer toward the substrate and total-reflected on a surface contacting a fingerprint of a user on the cover layer,wherein an angle formed by the first surface and the third surface of the protrusion is 19°
or lower.
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Accused Products
Abstract
Disclosed are a fingerprint recognition sensor including: a light source positioned while being spaced apart on one surface of the substrate and irradiating light toward the substrate; and a light direction switching layer positioned between the substrate and the light source, having a thickness-direction cross-section having a right-angled triangular shape, and including multiple protrusions constituted by a first surface in which the light irradiated from the light source is incident and refracted, a second surface contacting the one surface of the substrate, in which the refracted light is transmitted toward the substrate, and a third surface vertical to the one surface of the substrate, and a mobile display device having the same.
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Citations
17 Claims
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1. A fingerprint recognition sensor comprising:
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a light source positioned while being spaced apart on one surface of the substrate and irradiating light toward the substrate; a light direction switching layer positioned between the substrate and the light source, having a thickness-direction cross-section having a right-angled triangular shape, and including multiple protrusions constituted by a first surface in which the light irradiated from the light source is incident and refracted, a second surface contacting the one surface of the substrate, in which the refracted light is transmitted toward the substrate, and a third surface vertical to the one surface of the substrate; a cover layer spaced apart from the other surface of the substrate and facing the substrate; multiple sensor pixels defined by multiple scan lines and multiple data readout lines on the other surface of the substrate and positioned between the substrate and the cover layer; and multiple photo sensors positioned in the respective sensor pixels and sensing the light transmitted from the light direction switching layer toward the substrate and total-reflected on a surface contacting a fingerprint of a user on the cover layer, wherein an angle formed by the first surface and the third surface of the protrusion is 19°
or lower. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 17)
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11. A fingerprint recognition sensor comprising:
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a light source positioned while being spaced apart on one surface of the substrate and irradiating light toward the substrate; a first light direction switching layer positioned between the substrate and the light source, having a thickness-direction cross-section having a right-angled triangular shape, and including multiple first protrusions constituted by a first surface in which the light irradiated from the light source is incident and refracted, a second surface parallel to the one surface of the substrate, in which the refracted light is transmitted, and a third surface vertical to the one surface of the substrate; a second light direction switching layer positioned between the first light direction switching layer and the substrate and having a thickness-direction cross-section having a right-angled triangular shape, and including multiple second protrusions constituted by a fourth surface in which the light transmitted from the first light direction switching layer is incident and refracted, a fifth surface contacting the one surface of the substrate, in which the refracted light is transmitted toward the substrate, and a sixth surface vertical to the one surface of the substrate; a cover layer spaced apart from the other surface of the substrate and facing the substrate; multiple sensor pixels defined by multiple scan lines and multiple data readout lines on the other surface of the substrate and positioned between the substrate and the cover layer; and multiple photo sensors positioned in the respective sensor pixels and sensing the light transmitted from the second light direction switching layer toward the substrate and total-reflected on a surface contacting a fingerprint of a user on the cover layer. - View Dependent Claims (12, 13, 14, 15)
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Specification