A new type of thiopyridinyl-based iridium molecule (POT) was used as the yellow phosphorescent material in our research. On fabricating a yellow PHOLED by doping POT-02 with host as the emitter, the device achieved a high power efficiency of 66.0 lm/W and an external quantum efficiency of 23.2%. On the other hand, a white organic lightemitting diode (WOLED) with a high power efficiency has been demonstrated by dispersing a host-free, yellow phosphorescent material in-between double blue phosphorescent emitters. In this study, we introduce a simple process for generating yellow emission of a WOLED by using the B/Y/B EML configuration. The B/Y/B EML configuration can achieve a higher efficiency and a smaller color shift with various operational brightness values. Based on the concept of this device, the molecular engineering of the blue phosphorescent host material as well as the light-extraction film, a WOLED with a power efficiency of 103 lm/W and an external quantum efficiency of 38.2% at a practical brightness of 1000 cd/m<sup>2</sup> with CIE coordinates (CIE<sub>x, y</sub>) of (0.36, 0.48) can be achieved.
Many people believe that in the future, autostereoscopic 3D displays will become a mainstream display type.
Achievement of higher quality 3D images requires both higher panel resolution and more viewing zones. Consequently,
the transmission bandwidth of the 3D display systems involves enormous amounts of data transfer. We propose and
experimentally demonstrate a novel time-multiplexed autostereoscopic multi-view full resolution 3D display based on
the lenticular lens array in association with the control of the active dynamic LED backlight. The lenticular lenses of the
lens array optical system receive the light and deflect the light into each viewing zone in a time sequence. The crosstalk
under different observation scanning angles is showed, including the cases of 4-views field scanning. The crosstalk of
any view zones is about 5% respectively; the results are better than other 3D type.
Thermal actuated optoelectronic ring switch provides the advantages of high accuracy, easy actuation, and reasonable switching speed. However, when scaled up, the thermal ring switch may encounter issues related to fabrication error, nonaccurate wavelength response, and large terminal numbers in the control circuit. We propose the employment of an integrated control circuit to compensate for the fabrication error and tune as well as lock the wavelength in a thermal-actuated ring-type optical switch through an amplitude modulation scheme. Additional functionalities can also be added in this circuit by externally tailoring the round-trip loss or coupling constants of the ring. The design concept can be easily scaled up for large array optical switch system without much change in the terminal numbers thanks to the three-dimensional hierarchy of high gray-scale control circuit design, which effectively reduces the terminal numbers into the cubic root of the total control unit numbers. The integrated circuit has been designed, simulated, as well as fabricated, and demonstrated a decent performance with free spectral range equal to 1.5 nm at 1534 nm and very accurate wavelength modulation to 0.3 nm within 0.01 nm fluctuation for the thermal actuated ring-type optical switch.
Although a naked-eye 3D display is more convenient to watch for a viewer, so far and in the near future the image
quality of a stereo display watched with special glasses is still much better than the former. e.g. the viewing angle, the
crosstalk, the resolution, etc. While focusing on the glasses-type stereo display, the image performance of a time
multiplexed shutter-glasses-type 3D display should be better than that of a spatial multiplexed polarization-encoded 3D
display. Shutter-glasses-type 3D display was implemented many years ago by CRT. However, due to the generation
supersedure the CRT was replaced by LCD, the shutter-glasses solution couldn't work for several years as a result of the
long response time of LCD. Thanks to the development of over-drive technology, the response time of LCD is getting
faster, and a 100-120Hz panel refresh rate is possible. Therefore, 3D game fans have a very good opportunity to watch
full resolution, large viewing angle and low crosstalk stereo LCDs again. In this paper, a 120Hz LCD and an LED
dynamic backlight to overcome the hold-type characteristic of an LCD are used to implement a time-multiplexed 3D
display. A synchronization circuit is developed to connect the time scheme of the vertical sync. signal from the display
card, the scanning backlight and the shutter glasses. The crosstalk under different scanning conditions is measured.