Session Index

Display Technology

Display Technology I
Thursday, Dec. 7, 2017  13:00-14:45
Presider: Tsung-Hsien Lin;Ko-Ting Cheng
Room: International Research Building IR6002-B(6F)
13:00 - 13:30 Paper No.  2017-THU-S0701-I001
Invited Speaker:
Wai-Yeung Wong
Phosphorescent White Organic Light-emitting Diodes (WOLEDs) as Future Lighting Sources*
Wai-Yeung Wong

White organic light-emitting diodes (WOLEDs) offer a promising avenue to developing future energy-saving solid-state lighting sources because of their intrinsic characters such as low driving voltages, high brightness and efficiency, large area, etc. While commercialization of WOLEDs has attracted tremendous interest in both academic and industrial communities, the discovery of highly efficient phosphors opens up a good channel to meet this target. With the goal towards practical application, many design strategies, including new materials synthesis, judicious design of device configuration, wise management of charges/excitons in different active layers, development of sophisticated and low cost fabrication procedures, etc. have been put forward to achieve high efficiency, good white color stability and quality. In this lecture, the most recent advances in various aspects of the phosphorescent WOLEDs by our research group are presented.

13:30 - 13:45 Paper No.  2017-THU-S0701-O001
Guan - Wei Wu Award Candidate Electrical tunability of the Bragg bandgap in a cholesteric liquid crystal cell
Guan - Wei Wu;Po - Chang Wu;Wei Lee

The electrically tunable Bragg bandgap in a cholesteric cell with negative dielectric anisotropy is demonstrated and the temperature-dependent spectral properties of the cell are investigated. The Bragg bandgap can be flexibly tuned within the visible spectral region by modulating either the frequency or the amplitude of an externally applied voltage.

13:45 - 14:00 Paper No.  2017-THU-S0701-O002
Jia-Hao Li Award Candidate Linear polarization rotator by double-layer twisted-nematic liquid crystal cells
Jia-Hao Li;Ko-Ting Cheng;Min-Cheng Tsai;Cheng-Kai Liu;Te-yuan Chung

This study reports the configuration of a linear polarization rotator composed of double-layer twisted-nematic liquid crystal (TNLC) cells. To obtain the good degree of linear polarization of the output linearly polarized lights, the cell gap difference between these two TNLC cells should be less than 300 nm.

14:00 - 14:15 Paper No.  2017-THU-S0701-O003
Po-Cheng Lai Award Candidate A-Si:H Gate Driver Circuit with High Speed Operation for Full-HD AMLCDs
Po-Cheng Lai;Ching-En Lee;Chih-Lung Lin

This work proposes a gate driver circuit based on hydrogenated amorphous silicon thin-film transistors to accelerate the discharge of output waveform for full high-definition resolution displays. By using output signal of the next stage to raise the gate-node voltage of driving TFT, a high discharging capability is obtained.

14:15 - 14:30 Paper No.  2017-THU-S0701-O004
Ting-Wei Chiu Award Candidate Concave microlens arrays on glass substrates using photolithographic process and their optical properties
Ting-Wei Chiu;Su-Hua Chen;Chen-Yu Pai;Mao-Ku Wei

Transparent concave microlens arrays were successfully made on glass substrates using a simple photolithographic process. The shape of microlenses can be adjusted by varying the exposure dose. The luminous efficiency of organic light-emitting device can be enhanced up to 49%, even though the fill factor is as low as 48%.

14:30 - 14:45 Paper No.  2017-THU-S0701-O005
Ying Ju Lin Award Candidate Field-Sequential-Color LCDs for Vehicle Head-Up Displays: Color Breakup Suppression Using 180Hz Limited Backlight Signal Ratio Method
Ying Ju Lin;Qin Zong

This paper utilizes a LBSR method to suppress CBU for FSC LCDs used in vehicle HUDs. This method not only makes the CBU imperceptible but also achieves high image fidelity by using 180Hz LCDs with global-dimming backlights, leading HUD to be approximately three-times optically efficient without the color filters.