Electroluminescent display device with ultraviolet protection film
First Claim
Patent Images
1. An electroluminescent display device comprising:
- an anode;
a cathode;
a light emitting layer disposed between the anode and the cathode;
a substrate which light from the light emitting layer passes through; and
an ultraviolet protection film disposed in an optical path of the light passing through the substrate, the ultraviolet protection film having a substantially lower transmission at 400 nm than at 600 nm.
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Abstract
An electroluminescent display device includes an anode, a cathode and a light emitting layer disposed between the anode and the cathode. The display device also includes a substrate allowing light from the light emitting layer to pass through itself and an ultraviolet protection film disposed in an optical path of the light passing through the substrate. Retardation films and polarizers used in conventional electroluminescent display devices are replaced by the ultraviolet protection film with respect to reducing the effect of ultraviolet rays on the degradation of the display characteristics.
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Citations
18 Claims
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1. An electroluminescent display device comprising:
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an anode;
a cathode;
a light emitting layer disposed between the anode and the cathode;
a substrate which light from the light emitting layer passes through; and
an ultraviolet protection film disposed in an optical path of the light passing through the substrate, the ultraviolet protection film having a substantially lower transmission at 400 nm than at 600 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An electroluminescent display device comprising:
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a substrate having a thin film transistor thereon;
an ultraviolet protection film disposed over the thin film transistor and having an average transmission at visible region at least 80 times as high as an average transmission at ultraviolet region;
an anode disposed over the ultraviolet protection film;
a light emitting layer disposed over the anode and being driven by the thin film transistor; and
a cathode disposed over the light emitting layer.
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17. An electroluminescent display device comprising:
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a first substrate having a thin film transistor thereon;
an anode disposed over the first substrate;
a light emitting layer disposed over the anode and being driven by the thin film transistor;
a cathode disposed over the light emitting layer;
a second substrate disposed over the light emitting layer; and
an ultraviolet protection film disposed on a surface of the second substrate and having an average transmission in the visible region at least 80 times as high as an average transmission in the ultraviolet region.
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18. An electroluminescent display device comprising:
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an anode;
a cathode;
a light emitting layer disposed between the anode and the cathode;
a substrate which light from the light emitting layer passes through; and
means for preventing an ultraviolet ray from reaching the light emitting layer.
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Specification