Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2005-03-08
2005-03-08
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S500000, C313S501000, C313S505000, C313S506000, C428S690000, C428S691000
Reexamination Certificate
active
06864628
ABSTRACT:
The luminance of different colors of light emitted from EL elements in a pixel portion of a light emitting device is equalized and the luminance of light emitted from the EL elements is raised. The pixel portion of the light emitting device has EL elements whose EL layers contain triplet compounds and EL elements whose EL layers contain singlet compounds in combination. The luminance of light emitted from the plural EL elements is thus equalized. Furthermore, a hole transporting layer has a laminate structure to thereby cause the EL elements to emit light of higher luminance.
REFERENCES:
patent: 5457565 (1995-10-01), Namiki et al.
patent: 5485055 (1996-01-01), Keyser
patent: 5928802 (1999-07-01), Shi et al.
patent: 5932892 (1999-08-01), Hseuh et al.
patent: 6046547 (2000-04-01), Nishio et al.
patent: 6072278 (2000-06-01), Keyser et al.
patent: 6097147 (2000-08-01), Baldo et al.
patent: 6133693 (2000-10-01), Keyser
patent: 6175345 (2001-01-01), Kuribayashi et al.
patent: 6191764 (2001-02-01), Kono et al.
patent: 6194837 (2001-02-01), Ozawa
patent: 6204610 (2001-03-01), Komiya
patent: 6310360 (2001-10-01), Forrest et al.
patent: 6358633 (2002-03-01), Sano et al.
patent: 6359606 (2002-03-01), Yudasaka
patent: 6420834 (2002-07-01), Yamazaki et al.
patent: 6433486 (2002-08-01), Yokoyama
patent: 20010045565 (2001-11-01), Yamazaki
patent: 20010049197 (2001-12-01), Yamazaki et al.
D.F. O'Brien et al., “Improved Energy Transfer in Electrophosphorescent Devices,” Applied Physics Letters, vol. 74, No. 3, Jan. 18, 1999, pp. 442-444.
Tsutsui et al., “Electroluminescence in Organic Thin Films”, Photochemical Processes in Organized Molecular Systems, 1991, pp. 437-450.
M.A. Baldo et al., “Highly Efficient Phosphorescent Emission from Organic Electroluminescent Devices”, Nature vol. 395, Sep. 10, 1998, pp. 151-154.
M.A. Baldo et al., “Very High-Efficiency Green Organic Light-Emitting Devices Based on Electrophosphorescence”, Applied Physics Letters vol. 75, No. 1, Jul. 5, 1999, pp. 4-6.
Tsutsui et al., “High Quantum Efficiency in Organic Light-Emitting Devices with Irdium-Comolex as a Triplet Emissive Center”, Japanese Journal of Applied Physics vol. 38, Part 12B, Dec. 15, 1999, pp. L1502-L1504.
Ikeda Hisao
Mizukami Mayumi
Nishi Takeshi
Yamazaki Shunpei
Patel Nimeshkumar D.
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Roy Sikha
Semiconductor Energy Laboratory Co,. Ltd.
LandOfFree
Light emitting device comprising light-emitting layer having... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light emitting device comprising light-emitting layer having..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light emitting device comprising light-emitting layer having... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3416613