Thin-film electroluminescent display panel sealed by glass substrates and the fabrication method thereof
First Claim
1. A thin-film electroluminescent element comprising:
- a pair of substrates disposed to define a cavity therebetween;
a composite comprising a thin-film electroluminescent layer sandwiched between a pair of dielectric layers, said composite being disposed within said cavity, at least one of said pair of substrates being transparent to the light emitted by said electroluminescent layer when properly engaged;
a pair of opposing electrodes positioned to define said composite therebetween; and
a protective liquid disposed within said cavity defined by said substrates and being in contact with the dielectric layers, said protective liquid being adapted to impregnate into pin holes caused in the dielectric layers, said protective liquid being inert with respect to the thin-film electroluminescent layer and the two dielectric layers, resistant to high voltage, high humidity, and high temperature, and having a small vapor pressure and a small coefficient of thermal expansion.
0 Assignments
0 Petitions
Accused Products
Abstract
A thin-film electroluminescent display panel is sealed by a pair of glass substrates for protecting itself from the environment. A protective liquid is introduced between a counter glass substrate and a substrate for supporting the electroluminescent display panel. The protective liquid comprises silicon oil or grease which assures the thin-film electroluminescent panel of preservation of the electroluminescent display panel. The counter glass substrate is bonded to the substrate through an adhesive of, for example, photocuring resin. A capillary tube is provided within the substrate for injecting the liquid under vacuum conditions. The counter glass substrate can be plate-shaped thereby eliminating a spacer. The liquid has the ability of spreading into pin holes generated on dielectric layers, and is resistant to high voltage, high humidity and high temperature, and is inert to layers constituting the thin-film electroluminescent display panel and has a small vapor pressure and a small coefficient of thermal expansion.
-
Citations
20 Claims
-
1. A thin-film electroluminescent element comprising:
-
a pair of substrates disposed to define a cavity therebetween; a composite comprising a thin-film electroluminescent layer sandwiched between a pair of dielectric layers, said composite being disposed within said cavity, at least one of said pair of substrates being transparent to the light emitted by said electroluminescent layer when properly engaged; a pair of opposing electrodes positioned to define said composite therebetween; and a protective liquid disposed within said cavity defined by said substrates and being in contact with the dielectric layers, said protective liquid being adapted to impregnate into pin holes caused in the dielectric layers, said protective liquid being inert with respect to the thin-film electroluminescent layer and the two dielectric layers, resistant to high voltage, high humidity, and high temperature, and having a small vapor pressure and a small coefficient of thermal expansion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18, 19, 20)
-
-
11. A method for fabricating a thin-film electroluminescent element having a thin-film electroluminescent layer including an impurity serving as a luminescent center, a pair of dielectric layers deposited so as to sandwich said thin-film electroluminescent layer, and electrodes provided on each of said dielectric layers said method comprising:
-
positioning the thin-film electroluminescent element on a transparent plane substrate; disposing a counter substrate relative to the transparent plane substrate in such a manner to define a cavity therebetween containing the thin-film electroluminescent element; and introducing a protective liquid for covering the thin-film electroluminescent element into said cavity, the protective liquid being adapted to penetrate into pin holes present in the dielectric layers. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
Specification