Embedded active matrix organic light emitting diode (AMOLED) fingerprint sensor
AssigneeMotorola Mobility LLC
InventorSeongchul Daniel Hong
Life of this patent
Estimating the term…
Abstract
Various embodiments provide a handheld computing device, such as a cellular phone, that includes a fingerprint sensor embedded in the device's display active area. The fingerprint sensor is composed of a series of PIN diodes that are configured to operate in a photo-receiving mode. In various embodiments, the PIN diodes are formed as active matrix organic light emitting diodes (AMOLEDs) at least partially within the gap between pixels in the display active area.
Claims20
A display for a handheld computing device, the display comprising:
- a substrate;
- an array of pixels formed on the substrate, the individual pixels including a corresponding pixel circuit, each pixel circuit including an active matrix organic light emitting diode (AMOLED), wherein individual pixels are separated from other pixels by a gap;
- and
- a fingerprint sensor formed on the substrate, the fingerprint sensor including a plurality of PIN diode circuits individual ones of which formed at least partially within respective individual gaps that separate individual pixels, wherein each PIN diode circuit is associated with multiple pixels.
A handheld computing device comprising:
- a processing system;
- one or more memory devices;
- an application stored on the one or more memory devices and executable by the processing system, the application being configured to perform fingerprint-based authentication;
- a display comprising:
- a substrate;
- an array of pixels formed on the substrate, the individual pixels including a corresponding pixel circuit, each pixel circuit including an active matrix organic light emitting diode (AMOLED), wherein individual pixels are separated from other pixels by a gap;
- and
- a fingerprint sensor formed on the substrate, the fingerprint sensor including a plurality of PIN diode circuits individual ones of which formed at least partially within respective individual gaps that separate individual pixels, wherein each PIN diode circuit is associated with multiple pixels
- wherein the application is configured to perform said fingerprint-based authentication based on a fingerprint sensed by the fingerprint sensor.
A method for detecting a fingerprint, the method comprising:
- detecting, by a handheld computing device, a touch input on a display device of the handheld computing device;
- detecting a fingerprint associated with the touch input using a plurality of PIN diode circuits formed at least partially within respective gaps between respective pixel circuits of the display device, each PIN diode circuit being associated with multiple pixel circuits;
- ascertaining whether a detected fingerprint matches a fingerprint profile stored on the handheld computing device;
- and
- responsive to the detected fingerprint matching the fingerprint profile, unlocking the handheld computing device.
Dependencies are inferred from the claim text.