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US 6,072,450 AGranted
Display apparatus
AssigneeCasio Computer Co., Ltd.
InventorsHiroyasu Yamada, Tomoyuki Shirasaki, Yoshihiro Kawamura
Life of this patent
Estimating the term…
Abstract
Selection transistors and drive transistors are formed in individual pixel areas on a substrate. Cathode electrodes which reflect visible light are formed above the selection transistors and the drive transistors so as to cover the pixel areas, with flat insulation films between the cathode electrodes and the selection and drive transistors. An organic EL layer and an anode electrode are sequentially formed on the cathode electrodes.
Claims18
A display apparatus comprising:
- a substrate;
- active elements formed over said substrate and driven by an externally supplied signal;
- an insulation film formed over said substrate so as to cover said active elements, said insulation having at least one contact hole;
- at least one first electrode formed on said insulation film so as to cover said active elements, and connected to said active elements through said at least one contact hole, said at least one first electrode being made of a material which shields visible light;
- an organic electroluminescent layer having an organic electroluminescent material formed on said at least one first electrode so as to cover said active elements and including at least one layer which emits light in accordance with a voltage applied to said at least one layer;
- and
- at least one second electrode formed on said organic electroluminescent layer which covers said active elements.
4 more elements
A display apparatus comprising:
- a substrate;
- selection transistors formed over said substrate and arranged in a matrix pattern;
- drive transistors formed over said substrate and arranged in a matrix pattern, each of said drive transistors being connected to one of said selection transistors;
- address lines connected to said selection transistors and through which a signal for turning on said selection transistors is supplied;
- data lines connected to said selection transistors, a signal which corresponds to image data being supplied to said drive transistors through said data lines and said selection transistors while said selection transistors are on;
- an insulation film formed over said substrate so as to cover said drive transistors, said address lines and said data lines, said insulation film having contact holes formed in correspondence with said drive transistors;
- first electrodes made of a material which shields visible light, and formed on said insulation film so as to cover said selection transistors and said drive transistors, said first electrodes being arranged in a matrix pattern in areas surrounded by said address lines and said data lines, and being connected to said drive transistors through said contact holes;
- an organic electroluminescent layer formed on said first electrodes which covers said selection transistors and said drive transistors and including at least one layer which emits light in accordance with an applied voltage;
- a second electrode formed on said organic electroluminescent layer which covers said selection transistors and said drive transistors;
- a first driver circuit for selectively supplying said address signal to said address lines in sequence;
- and
- a second driver circuit for supplying said image data to said data lines.
9 more elements
Dependencies are inferred from the claim text.