Patent ID: 11862095
Assignee: EMAGIN CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A method for compensating at least one pixel for an image in an organic light-emitting diode display system comprising a plurality of OLED-based display pixels, wherein each display pixel comprises pixel drive circuitry, the method comprising the steps of:
(a) providing a sensing system comprising a plurality of sensors and a processor, the processor comprising:
(i) a lock-in amplifier (LIA);
(ii) a low pass filter (LPF); and
(iii) analog to digital (ADC) circuitry operatively connected to each of the sensors, the ADC circuitry providing a sensor signal for each of the sensors;

(b) applying a drive signal having a periodic signal embedded therein to at least one OLED pixel in the display;
(c) receiving the sensor signal from the ADC circuitry for each sensor;
(d) providing a primary frequency component from the sensor signals using the LIA based on the periodic signal;
(e) providing secondary frequency components from the sensor signals using the LPF;
(f) converting the secondary frequency components to a digital signal using the ADC;
(g) providing the digital signal to the processor as a sensing signal; and
(h) determining compensation for the drive signal.