Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – Plural light emitting devices
Reexamination Certificate
1998-11-10
2001-04-03
Tran, Minh Loan (Department: 2811)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
Plural light emitting devices
C257S089000, C257S103000, C313S509000
Reexamination Certificate
active
06211538
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an electroluminnescent device and a method for manufacturing thereof; and, more particularly, to a color electroluminnescent device and a method for manufacturing thereof.
BACKGROUND OF THE INVENTION
In recent years, elctroluminescent (EL) devices in both a thin-film EL type and a thick-film type have been suggested to display a multi-color image. Both of the thin-film and thick-film EL devices, however, are burdened with major shortcomings.
To be more specific, the thin-film EL device, while capable of providing a red light of a commercially acceptable brightness level, is incapable of providing the same for a blue light of a commercially acceptable brightness level, whereas the thick-film EL device, while capable of providing a blue light of a commercially acceptable brightness level, is incapable of providing the same for a red light of a commercially acceptable brightness level.
In other words, neither the thin-film EL device nor the thick-film EL device could provide the blue light and red lights of a commercially acceptable brightness level concurrently to thereby prevent the EL devices from displaying a full-color image of a commercially acceptable brightness level.
SUMMARY OF THE INVENTION
It is, therefore, a primary object of the present invention to provide an electroluminescent (EL) device and a method for manufacturing thereof capable of providing a blue light and a red light having a commercially acceptable brightness level.
It is another object of the present invention to provide an electroluminescent (EL) device and a method for manufacturing thereof capable of displaying a full-color image by generating a blue light, a green light and a red light, having a commercially acceptable brightness level.
In accordance with the present invention, there is provided an EL device comprising: a substrate; a thick-film electroluminescent (EL) layered structure formed on either on top or bottom of the substrate, the thick-film EL layered structure including a blue light emitting thick-film EL layer; a thin-film EL layered structure formed on either on top of the substrate or on top of the thick-film EL layered structure, the thin-film EL layered structure including a red light emitting thin-film EL layer; and a green light emitting EL layer to be included either in the thick-film EL layered structure as a green light emitting thick-film EL layer or in the thin-film EL layered structure as a green light emitting thin-film EL layer.
REFERENCES:
patent: 4801844 (1989-01-01), Barrow et al.
patent: 5198721 (1993-03-01), Kahng et al.
patent: 5598059 (1997-01-01), Sun et al.
Korea Institute of Industrial Tech.
Rosenman & Colin LLP
Tran Minh Loan
LandOfFree
Electroluminescent device including a blue light emitting... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electroluminescent device including a blue light emitting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electroluminescent device including a blue light emitting... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2528102