Claims
- 1. A thin film electroluminescent element comprising:
- a luminous layer having two sides opposite to each other and an inner end face defining a central bore, said luminous layer adapted to emit light by applying a voltage between said two sides;
- first electrode means disposed on said luminous layer at one side of said two sides for applying said voltage to said luminous layer, said first electrode means being adapted to reflect the light in the luminous layer to guide the light toward said inner end face;
- second electrode means disposed on said luminous layer at the other side of said two sides for applying said voltage to said luminous layer, said second electrode means being adapted to reflect the light in the luminous layer to guide the light toward said inner end face, at least one of said first electrode means and second electrode means having a bore consistent with said bore of said luminous layer; and
- central scattering means filled in said central bore of said luminous layer for scattering the light from the inner end face, so that the light from said inner end face is taken out perpendicularly with respect to said luminous layer.
- 2. A thin film electroluminescent element according to claim 1, wherein each of said first electrode means and said second electrode means comprises an insulating layer in contact with said luminous layer at one side thereof and a metal electrode disposed on said insulating layer at the other side of said insulating layer.
- 3. A thin film electroluminescent element according to claim 2, wherein said metal electrode of said first electrode is formed on a substrate.
- 4. A thin film electroluminescent element according to claim 3, wherein said second electrode means has said bore, and said scattering means is formed on said first electrode means.
- 5. A thin film electroluminescent element according to claim 4, wherein another luminous layer is disposed on said second electrode means through an insulating film, a third electrode means is disposed on said another luminous layer, and said scattering means extends to an end face of said another luminous layer.
- 6. A thin film electroluminescent element according to claim 5, wherein said luminous layer and said another luminous layer have luminous wavelength characteristics different from each other.
- 7. A thin film electroluminescent element according to claim 3, wherein said luminous layer has an outer end face, and said second electrode means surrounds said outer end face.
- 8. A thin film electroluminescent element according to claim 3, wherein each of said first electrode means and said second electrode means has said bore, said substrate is made of glass, and an upper face of said second electrode means and an upper face of said scattering means is covered with a black protecting layer.
Priority Claims (2)
Number |
Date |
Country |
Kind |
63-233750 |
Sep 1988 |
JPX |
|
1-2002 |
Jan 1989 |
JPX |
|
Parent Case Info
This application is a Continuation of application Ser. No. 07/407,586, filed on Sept. 15, 1989, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2033125 |
May 1980 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
407586 |
Sep 1989 |
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