Himax Technologies has been granted a patent for a fingerprint detection system with a detection circuit that includes an integrating amplifier and an analog-to-digital converter. The system prevents noise from affecting the time-integral signal by coupling the first common-mode voltage to the integrator. GlobalData’s report on Himax Technologies gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Himax Technologies, Adaptive video coding was a key innovation area identified from patents. Himax Technologies's grant share as of January 2024 was 69%. Grant share is based on the ratio of number of grants to total number of patents.
Fingerprint detection system with noise prevention in time-integral signal
A recently granted patent (Publication Number: US11886666B1) discloses a fingerprint detection system that includes a sensor panel with a photo diode and a sampling switch, along with a detection circuit comprising an integrator and an analog-to-digital converter (ADC). The integrator prevents noise from affecting the time-integral signal by coupling the first common-mode voltage to the integrator. The system also features various components such as coupling capacitors, charge switches, buffer amplifiers, and transistors to ensure accurate fingerprint detection and signal processing.
Furthermore, the patent details a detection circuit adaptable to a fingerprint detection system, emphasizing the integration of an integrating amplifier, ADC, conversion switch, conversion capacitor, buffer amplifiers, and voltage adders. By coupling the first common-mode voltage to the integrating amplifier, noise interference is minimized, ensuring the accuracy and reliability of the fingerprint detection process. The circuit also includes components like reset voltage providers, reference voltage generators, and coupling capacitors to facilitate efficient signal processing and conversion for precise fingerprint recognition.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
