Print Image Acquisition TRIZ Cases
- Fingerprint Imaging With Crossing Electrodes and Drive-Sense Circuits
Crossing electrode arrays use self- and mutual-capacitance signals to capture fingerprint ridges and valleys despite ambient light.
- Multi-Microlens Fingerprint Sensor With Variable Pinhole Apertures
Outwardly splayed photodiode views shrink the fingerprint sensor, while larger peripheral pinholes compensate for reduced light admission.
- Fingerprint Sensor Light-Blocking Layers for Ambient Noise Control
Nested blocking layers with different opening widths limit ambient light at the fingerprint sensor, improving signal-to-noise ratio and recognition accuracy.
- Organic Photodiode Detection Using Auxiliary Capacitor Electrodes
Layered auxiliary capacitor electrodes increase sensor capacity and maximum output signal while reducing photodiode leakage current.
- Ridge Recognition Substrate With Dummy Devices for Noise Calibration
Light-shielding dummy devices calibrate output currents and filter transverse, dark, and illumination noise during ridge imaging.
- Microlens Fingerprint Identification Optics With Angled Light-Guiding Channels
Microlenses and layered apertures form angled light-guiding channels that improve fingerprint imaging in thin mobile terminals.
- Curved Capacitive Fingerprint Identification With Column Signal Control
Column-specific driving signals keep output voltages comparable across curved capacitive fingerprint surfaces, reducing data saturation and easing identification processing.
- Interleaved Ultrasonic Pixels for High-Resolution Fingerprint Capture
Interleaved sensor pixels maintain high-resolution fingerprint capture at lower density while sharing readout circuitry.