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47‐1: The World Smallest OLED Microdisplay Projection Device Design Methodology
Author(s) -
Itonaga Kazuichiro,
Sudo Shoji,
Nishikawa Jun,
Kimura Kei,
Uchiyama Hiroki,
Yagi Masato,
Sawano Ryosuke,
Matsuyama Takatoshi,
Sasaki Kouji,
Itatsu Kentaro,
Tsuchiya Takahiro,
Nomura Yoshiyuki,
Sato Yoshihisa
Publication year - 2020
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.13960
Subject(s) - oled , optoelectronics , materials science , pixel , projection (relational algebra) , anode , brightness , diode , optics , microlens , cathode , lens (geology) , thin film transistor , light emitting diode , physics , computer science , electrode , electrical engineering , engineering , layer (electronics) , algorithm , quantum mechanics , composite material
We developed the world smallest OLED microdisplay projection device. This device consists of just 2 parts which a high‐brightness Microdisplay based Organic Light Emitting diodes on a silicon backplane panel (M‐OLED) ( 1,000,000 [cd/m 2 ] ) and an optimal lens (F/1.1) for the self‐emitting projection device. This high‐ brightness M‐OLED is used 2 key technologies. The first is a supplying the photoexitation potential to multiple emitting layers in OLED using by the new pixel transistor (Tr.) that can withstand very high voltage in 7.8 pm pixel. The second is the controlling light divergence angle from each self‐emitting pixel that made using micro optical resonance effect from cathode until anode electrode in OLED and the optimized micro lens (ML) for each pixel. Next, we evaluated the relationship between the light divergence angle from M‐OLED and F number (Fno.) of the projection lens and we found parameters and a specific method for controlling the light efficiency of the self‐emitting projection device. Based on the results of these fundamental studies, we established a design methodology for the self‐emitting projection device with high efficiency, and we realized the world smallest self‐emitting projection device (W 10 /D 11 /H 6 (mm)).