Emagin Corporation

Seonki Kim

Amalkumar P Ghosh

Hyuk Sang Kwon

Olivier Prache

Olivier F Prache

Pixels and sub-pixels suitable for high-density displays are disclosed. High-density is realized by forming a top-gate thin-film transistor (TFT) directly on top of a light-emitting diode (LED), thereby reducing the real estate required. To enable the stacked structure, a planarization layer is formed such that its top surface is coplanar with the top surface of the top electrode of the LED. The source and drain of the TFT are then formed on the planarization layer and electrode such that electrical contact is made between the LED and the TFT. In some embodiments, the fabrication includes deposition of an additional planarization layer whose top surface is coplanar with the top surface of the gate of the TFT. This enables formation of a parallel-plate capacitor on the TFT/LED stack, thereby reducing the footprint of the pixel even further.

Monolithically integrated top-gate thin-film transistor and light-emitting diode and method of making

An OLED display system is provided having visual performance pixel compensation for loss of brightness, including display pixels, where each display pixel has OLED subpixels and pixel drive circuitry; a sensing system having sensors and analog to digital conversion circuitry connected to each of the sensors, and a processor to provide an image data drive signal to each of the display pixels, receive the sensor signal from the ADC circuitry for each sensor, estimate a state of degradation of at least one of the display pixels, determine a drive-signal compensation for each display pixel having an estimated state of degradation and compensate the image data drive signal to each display pixel having an estimated state of degradation. Methods for compensating pixels for an image in a display are also provided.

OLED-based display having pixel compensation and method

An OLED display system having compensation or loss of brightness is provided, including OLED-based display pixels, a sensing system having sensors, a processor having an LIA, an LPF, and analog to digital circuitry connected to each sensor and for providing a sensor signal for each sensor. The processor is adapted to apply a drive signal having a periodic signal to at least one OLED pixel in the display, receive the sensor signal, provide a primary frequency component from the sensor signals using the LIA based on the periodic signal, provide secondary frequency components from the sensor signals using the LPF, convert the secondary frequency components to a digital signal using the ADC, provide the digital signal to the processor as a sensing signal, and determine compensation for the drive signal. A method is also provided.

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Fishkill, NY, United States of America

Seonki Kim