Abstract: At least some example embodiments provide a fingerprint sensor, a fingerprint sensor package, and a fingerprint sensing system using light sources of a display panel. The fingerprint sensor includes an image sensor including a plurality of sensor pixels, the sensor pixels configured to sense light reflected by a fingerprint and generate image information corresponding to the fingerprint and a pinhole mask defining a plurality of pinholes, wherein each of the pinholes forms a focus for transmitting the light reflected by the fingerprint to the image sensor, wherein light is emitted from a plurality of organic light-emitting diodes (OLEDs) and is reflected by the fingerprint.

Abstract: An integrated circuit includes an operational circuit and a test circuit for measuring a leakage current associated with all or part of the operational circuit. The leakage current measurement circuit may include a mirror circuit configured to mirror leakage current to a current-to-voltage converter and an analog-to-digital converter configured to convert the analog voltage representative of the leakage current developed by the current-to-voltage converter to a digital value.

Abstract: An integrated circuit includes an operational circuit and a test circuit for measuring a leakage current associated with all or part of the operational circuit. The leakage current measurement circuit may include a mirror circuit configured to mirror leakage current to a current-to-voltage converter and an analog-to-digital converter configured to convert the analog voltage representative of the leakage current developed by the current-to-voltage converter to a digital value.