Session Index

S7. Display and Solid State Lighting

Display and Solid State Lighting II
Friday, Dec. 2, 2022  15:15-17:00
Presider: Ray-Hua Hong、Po-Tsun Liu
Room: 2F A203
15:15 - 15:30 Award Candidate (Paper Competition)
Manuscript ID.  0466
Paper No.  2022-FRI-S0702-O001
Ting-Wei Hsu The mini-LED matrix with IR phosphor applied to forward lighting
Ting-Wei Hsu, Quang-Khoi Nguyen, Yi-Jou Lin, National Central University (Taiwan); Ching Sun, National Yang Ming Chiao Tung University (Taiwan); Xuan-Hao Lee, Shih-Kang Lin, Chi-Shou Wu, Tsung-Hsun Yang, National Central University (Taiwan); Tian-Li Wu, National Yang Ming Chiao Tung University (Taiwan); Tsung-Xian Lee, National Taiwan University of Science and Technology (Taiwan); Chao-Hsin Chien, National Yang Ming Chiao Tung University (Taiwan); Yeh-Wei Yu, Ching-Cherng Sun, National Central University (Taiwan)

This paper proposed to cover IR phosphor plates on LED dies in the high beam of the mini-LED matrix. Thus the vehicle can project infrared light, which can be incorporate machine vision for an autonomous vehicle without using a complicated adaptive light to avoid glare.

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15:30 - 15:45 Award Candidate (Paper Competition)
Manuscript ID.  0531
Paper No.  2022-FRI-S0702-O002
Dian Luo Tandem ionic/nonionic hybrid white phosphorescent organic electroluminescent device
Dian Luo, Hai-Ching Su, National Yang Ming Chiao Tung University (Taiwan); Chih-Hao Chang, Yuan Ze University (Taiwan)

By stacking solution-processed blue ionic transition metal complexes (iTMC)-based light-emitting unit (EMU) with vacuum-evaporated charge-generating layer (CGL) and red phosphorescent EMU. A hybrid white tandem organic electroluminescent device with Commission Internationale de l'éclairage (CIE) coordinates (0.39, 0.39) and maximum external quantum efficiency (EQE) of 21.53% is achieved.

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15:45 - 16:00 Award Candidate (Paper Competition)
Manuscript ID.  0578
Paper No.  2022-FRI-S0702-O003
Chun-Chieh Chu Novel Emitter for Non-Doped Thermally Activated Delayed Fluorescence White-light Organic Light-emitting Diode
Chun-Chieh Chu, Chia-Hsun Chen, Chih-Pin Han, National Taiwan University (Taiwan); Bo-Yen Lin, National Dong Hwa University (Taiwan); Man-kit Leung, National Taiwan University (Taiwan); Tien-Lung Chiu, Yuan Ze University (Taiwan); Jiun-Haw Lee, National Taiwan University (Taiwan)

A novel thermally activated delayed fluorescence emitter was synthesized for nondoped white organic light-emitting diode application which exhibited Commission Internationale d'Eclairage (CIE) coordinates of (0.33,0.31).

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16:00 - 16:15 Award Candidate (Paper Competition)
Manuscript ID.  0467
Paper No.  2022-FRI-S0702-O004
Yi-Chien Chen Compact Mini-LED Driving Circuit with Low Power Consumption Structure For Use in LCD Backlight Units
Yi-Chien Chen, Chih-I Liu, Chung-Tien Chu, Chih-Lung Lin, National Cheng Kung University (Taiwan)

This paper presents a mini-LED driving circuit using low-temperature poly-crystalline silicon thin-film transistors (LTPS TFTs) with low power consumption. To minimize the voltage across VDD and VSS, the threshold voltage variation of driving TFT is compensated by the matching-TFT method to reduce the number of TFTs on the driving current path. Simulations show the proposed circuit has 15.79% lower power consumption than the circuit with two TFTs on the driving current path.

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16:15 - 16:30 Award Candidate (Paper Competition)
Manuscript ID.  0230
Paper No.  2022-FRI-S0702-O005
Wei-Yi Shi CsPbBr3/Cs4PbBr6@SiO2 Quantum Dots and Distributed Bragg Reflector for Micro-LED Displays
Wei-Yi Shi, Chih-Wei Lo, Kai-Ping Chang, Kuang-Wei Liu, Chia-Hsun Huang, Chun-Ting Tai, Che-Chun Lu, Chao-Chun Yen, National Chung Hsing University (Taiwan); Dong-Sing Wuu, National Chung Hsing University (Taiwan), National Chi Nan University (Taiwan)

The quantum dot of CsPbBr3/Cs4PbBr6@SiO2 was dispersed in photoresist by cyclopentanone to create a 50 × 50 μm pixel size on the color-conversion layer of a blue micro-LED display. The distributed Bragg reflector was also applied on the pixels to reflect excessive blue light, suitable for micro-LED display.

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16:30 - 16:45 Award Candidate (Paper Competition)
Manuscript ID.  0186
Paper No.  2022-FRI-S0702-O006
Chih-Yuan Tsai Experimental Characterization of Highly Efficient Full-Color 1588 PPI Micro-LED Displays
Chih-Yuan Tsai, Jian-Hong Lin, Yen-Chia Cheng, Ching-Fuh Lin, National Taiwan University (Taiwan)

Micro-light-emitting diodes (micro-LEDs) with remarkable advantages are becoming the mainstream technique in today's high-end displays. However, the further development of micro-LEDs still faces some difficulties, one of which is the mass transfer yield. Here we report a solution to bypass this problem. We apply the color-conversion layer (CCL) to produce full primary colors under blue-light illumination. With the fabrication of 7 × 7 microns subpixel arrays, the pixel density attains full-color 1588 PPI. Additionally, the color gamut achieves 97.4% in DCI-P3 with the color purifying film usage. Our results provide a guideline for advancing display technology by realizing full-color micro-LEDs.

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16:45 - 17:00 Award Candidate (Paper Competition)
Manuscript ID.  0157
Paper No.  2022-FRI-S0702-O007
Jhih-Yi Lyu Multifunctional Smart Window with Transmittance, Light Field and Scattering Control
Jhih-Yi Lyu, Li-Min Chang, Kuan-Wu Lin, Heng-Yi Tseng, Cheng-Chang Li, Duan-Yi Guo, Hung-Chang Jau, Chun-Ta Wang, Tsung-Hsien Lin, National Sun Yat-sen University (Taiwan)

This article presents a multifunctional smart glass fabricated by adding ionic dopants to nematic liquid
crystals (LCs). Due to the design of the asymmetric alignment, the transmittance of the glass will
depend on the viewing angle in one dimension without applying an electric field which shows the
function of light field shaping. It can be switched between tinted and scattering states by changing the
frequency and strength of the electric field. This research provides a new type of smart glass and this
design is potential in smart and green architecture.

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