OPTICAL FINGERPRINT NAVIGATION DEVICE WITH LIGHT GUIDE FILM
First Claim
1. An optical finger navigation device comprising:
- a light guide film (LGF), wherein at least a portion of the LGF exhibits total internal reflection (TIR);
a light source in optical communication with the LGF and configured to inject light into the LGF;
a sensor configured to detect light that exits from the LGF after being reflected from a finger that is proximate the LGF; and
a navigation engine configured to generate lateral movement information, which is indicative of lateral movement of the finger relative to the sensor, in response to light that is reflected from the finger and detected by the sensor.
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Accused Products
Abstract
Embodiments of a finger navigation device are described. In one embodiment, the finger navigation device includes a light guide film (LGF), a light source, a sensor, and a navigation engine. At least a portion of the LGF exhibits total internal reflection (TIR) and the light source is in optical communication with the LGF and configured to inject light into the LGF. The sensor is configured to detect light that exits from the LGF after being reflected from a finger that is proximate the LGF and the navigation engine is configured to generate lateral movement information, which is indicative of lateral movement of the finger relative to the sensor, in response to light that is reflected from the finger and detected by the sensor. Other embodiments of the finger navigation device are also described.
30 Citations
20 Claims
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1. An optical finger navigation device comprising:
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a light guide film (LGF), wherein at least a portion of the LGF exhibits total internal reflection (TIR); a light source in optical communication with the LGF and configured to inject light into the LGF; a sensor configured to detect light that exits from the LGF after being reflected from a finger that is proximate the LGF; and a navigation engine configured to generate lateral movement information, which is indicative of lateral movement of the finger relative to the sensor, in response to light that is reflected from the finger and detected by the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14)
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12. An optical finger navigation device comprising:
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a circuit board substrate; a sensor attached to the circuit board substrate, the sensor including an array of distinct photodetectors; a light guide film (LGF) attached to the circuit board substrate and located proximate the sensor such that the sensor is between the circuit board and at least a portion of the LGF; a light source attached to the circuit board substrate and configured to inject light into an edge surface of the LGF; and a navigation engine configured to generate movement information, which is indicative of movement of a finger relative to the sensor, in response to light that is reflected from the finger and detected by the sensor.
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15. A portable electronic system comprising:
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a display comprising a navigation indicator; an optical finger navigation device configured to generate a navigation signal to move the navigation indicator based on a change in a detected light pattern according to movement of a finger relative to the optical finger navigation device, the optical finger navigation device comprising; a light guide film (LGF), wherein at least a portion of the LGF exhibits total internal reflection (TIR); a light source in optical communication with the LGF and configured to inject light into the LGF; a sensor configured to detect light that exits from the LGF after the light is reflected from the finger; and a navigation engine configured to generate lateral movement information, which is indicative of lateral movement of the finger relative to the sensor, in response to light that is reflected by the finger and detected by the sensor. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification