Session Index

Display Technology

Display Technology I
Thursday, Dec. 2, 2021  13:15-15:00
Presider: Prof. Chong-Yi Lee Prof. Li-Yin Chen
Room: 302c
13:15 - 13:30 Award Candidate (Paper Competition)
Manuscript ID.  0510
Paper No.  2021-THU-S0701-O001
Hong-Ru Chen Flexible Oxide-Based CMOS Inverters with High Gain
Hong-Ru Chen;Shu-Ming Hsu;Dung-Yue Su;Feng-Yu Tsai;I-Chun Cheng

A flexible CMOS inverter comprising a p-channel SnO and an n-channel IGZO thin-film transistors was fabricated on a polyimide substrate. This inverter exhibits a noise margin high, noise margin low, and static voltage gain of 4.8 V, 4.2 V, and 346 V/V, respectively, at a supply voltage of 10 V.

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13:30 - 13:45 Award Candidate (Paper Competition)
Manuscript ID.  0230
Paper No.  2021-THU-S0701-O002
Chun-Chuan Wang A switchable projection system based on broadband Cholesteric Liquid Crystal reflector
Chun-Chuan Wang

We proposed a concept of switchable projection system for transparent display applications. The projection screen consists of a polarization-sensitive optical diffuse based on broadband cholesteric liquid crystal (CLC) and a polarization-modulator (PM) made of a linear polarizer, a twisted nematic liquid crystal (TNLC), and a quarter-wave plate. Such a projection system is able to switch between transparent and reflective states and provides high display quality with wide viewing angle and high contrast ratio.

13:45 - 14:00 Award Candidate (Paper Competition)
Manuscript ID.  0307
Paper No.  2021-THU-S0701-O003
Chen-Yi Lin Hybrid photo- and electrical-controllable smart window
Chen-Yi Lin

This research and development can use light fields and electric fields to change the transmittance of smart windows. Photochromic dichroic dyes will change the window to a dark state when exposed to sunlight. The doped cholesteric liquid crystal can be switched from a transparent state to a scattering state through a voltage bistable state. And can switch four different states, transparent, scattering, dark transparent, and dark scattering. In the absence of applied voltage, each state is stable. This smart window can automatically adjust the penetration and can be manually adjusted to meet the needs of privacy.

14:00 - 14:15 Award Candidate (Paper Competition)
Manuscript ID.  0326
Paper No.  2021-THU-S0701-O004
Ching-Huang Chiu Efficient blue phosphorescent organic light-emitting diode by employing hybrid-donor-acceptor host
Ching-Huang Chiu;Bo-Yen Lin;Chia-Hsun Chen;Man-kit Leung;Jiun-Haw Lee;Tien-Lung Chiu

An efficient blue phosphorescent organic light emitting diode, exhibiting turn on voltage of 2.8 V, current efficiency of 58.6 cd/A, power efficiency of 52.7 lm/W and external quantum efficiency of 27.5%, was demonstrated by using a host, based on carbazole and acridine (Ac) moieties as hybrid donor and benzimidazole moiety as acceptor. Ac featuring electron donating capability was thereby incorporated into donor segment to modify the energy level for improvement of hole transport in OLED. As a consequence, highest occupied molecular orbital (HOMO) of new host was approximately 5.4 eV, leading to low turn on voltage (< 3 V).

14:15 - 14:30 Award Candidate (Paper Competition)
Manuscript ID.  0242
Paper No.  2021-THU-S0701-O005
Yi-Jyun Ke Realized large-scale and multi-domain photo-alignment technique based on digital light processing system
Yi-Jyun Ke

We report on a fast and multi-domain photo-alignment technique based on Digital Light Processing (DLP) system to pattern a complex photo-alignment image without expensive photomasks. This technique has great potential to fabricate some optical writing components such as security cards and liquid crystal grating.

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14:30 - 14:45 Award Candidate (Paper Competition)
Manuscript ID.  0287
Paper No.  2021-THU-S0701-O006
Yu-Chen Chou Automatic Optical Inspection of Pixel Illuminance for Displays at Oblique Perspectives
Yu-Chen Chou;Chieh-En Lee;Po-Yuan Hsieh;Chung-Hao Tien

Due to the limited field-of-view of cameras, automatic optical inspection for large-size or curve displays with a single camera needs to be equipped with a motorized railing system. In order to keep to normal imagery, the movement range of the camera as well as the rail length is proportional to the panel size. In this work, we took an alternative scenario with camera rotation and geometric transformation via algorithms to increase the field-of-view of the system. Proposed algorithm was successfully demonstrated to register pixelwise illuminance of a commercial display at different camera panning angles.

14:45 - 15:00 Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0654
Paper No.  2021-THU-S0701-O007
Yi-Ming Li Auto brightness and color correction for medical display monitor with color sensor
Yi-Ming Li;Wen Meng;Chih-Yu Tsai;Tsung-Xian Lee

This study applies color sensor and color correction for medical display monitor auto brightness. The results show that in the selection of training samples, factors such as the uniformity of the chromaticity and brightness distribution, how the samples are designed, etc., will have an impact on the calibration results.

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