First full-color thin  film electroluminescent (TFEL) display product: the FC-2

C. Laakso; W. A. Barrow; R. Coovert; Eric Dickey; T. Flegal; M. Fullman; Christopher N. King; Richard T. Tuenge; Sey-Shing Sun; Christian F. Schaus

doi:10.1117/12.207518

24 April 1995 First full-color thin film electroluminescent (TFEL) display product: the FC-2

C. Laakso, W. A. Barrow, R. Coovert, Eric Dickey, T. Flegal, M. Fullman, Christopher N. King, Richard T. Tuenge, Sey-Shing Sun, Christian F. Schaus

Author Affiliations +

Proceedings Volume 2408, Liquid Crystal Materials, Devices, and Displays; (1995) https://doi.org/10.1117/12.207518
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

Planar has developed the first manufacturable, full color, high contrast, 320.256 line thin film electroluminescent (TFEL) display; the FC-2. Three primary tasks in developing the FC-2 were (1) blue phosphor improvement, (2) unique panel structure development for enhanced optical properties, and (3) application of high density interconnects. We review progress in the development of the cerium doped, alkaline earth thiogallate compounds for blue emission. ZnS:Mn is filtered for red emission and ZnS:Tb is used for green. The panel structure reported optimizes key performance parameters by enhancing the fill factor, frequency of operation, and power efficiency. It uses a `dual substrate' approach, placing the blue phosphor on one substrate and the red/green on the other. We describe panel fabrication processes and assembly techniques utilized. We also describe the electronic driver and addressing schemes used to maximize the brightness. The high interconnect density in this 5' diagonal display demands an improved driver interconnect scheme. Planar has developed a chip on glass (COG) process with the driver chips bonded directly to the glass substrate and wire bonded to the rows, columns, and control electronics. This approach is compared to conventional tape carrier package (TCP) and flex interconnects. Mechanical, optical and electrical panel performance specifications are reported together with some exiting areas of future development.

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C. Laakso, W. A. Barrow, R. Coovert, Eric Dickey, T. Flegal, M. Fullman, Christopher N. King, Richard T. Tuenge, Sey-Shing Sun, and Christian F. Schaus "First full-color thin film electroluminescent (TFEL) display product: the FC-2", Proc. SPIE 2408, Liquid Crystal Materials, Devices, and Displays, (24 April 1995); https://doi.org/10.1117/12.207518

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KEYWORDS

Glasses

Focus stacking software

Electrodes

Thin films

Etching

Manufacturing

Cerium

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