Browsing by Author "Lin, Kun-Yueh"

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A novel pixel circuit compensating for poly-Si threshold-voltage shift and degradation of OLED for emi-flective display
(2007)
Lin, Kun-Yueh
;
Yang, Bo-Ru
;
Shieh, Han-Ping D.
;
光電工程學系
;
Department of Photonics
A novel pixel circuit design of poly-silicon backplane for emi-flective display that integrated a reflective liquid crystal display (R-LCD) and a top-emission organic emitting diode (TOLED) was proposed. The pixel circuit could compensate both the threshold voltage shift of poly-silicon transistors and the turn-on voltage shift of TOLEDs.
High contrast ratio emi-flective LCD with nano-particle transflector
(2007)
Yang, Bo-Ru
;
Lin, Kun-Yueh
;
Shieh, Han-Ping D.
;
Lee, Shih-Nan
;
Chen, Chin H.
A novel emi-flective display that integrates a reflective liquid crystal display (R-LCD) and an organic light emitting diode (OLED) display was demonstrated. Under the light ambience (if 30 nits, the OLED achieved a gain factor of 8 in contrast ratio (CR) compared with the conventional non-integrated OLED: besides, the OLED was fully operational and the system's CR of 5000:1 at the viewing cone of 50 degrees could be achieved. Moreover, the R-LCD retained a CR of 10:1 at the viewing cone of 55 degrees in the bright ambience. To enhance the image quality of both R-LCD and OLED, we laid a nano-particle film (NPF) in the intermediate section of the hybrid device. The NPF was demonstrated to enhance the light extraction in transmission mode of the integrated device to 103% and the haze function of the reflection mode to a factor of 15 compared with the freestanding mirror.