Active-matrix-driven organic EL display device
AssigneeNEC Corporation
InventorsYuji Kondo, Atsushi Kota
Life of this patent
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Abstract
Each unit pixel of an active-matrix-driven organic EL display device includes a pixel EL element and an associated pixel circuit. An array of the pixel EL elements are formed on the front surface of a multilayer substrate, the rear surface of which mounts thereon a drive IC and the plurality of pixel circuits. The electrodes of the drive IC are connected to the anode and cathodes of the pixel EL elements through via holes and interconnects formed in the multilayer substrate.
Claims8
An active-matrix-driven organic electroluminescence (EL) display device comprising:
- first and second substrates;
- a plurality of unit pixels each including a pixel EL element and a pixel circuit, said pixel EL elements being arranged in a matrix on a front surface of said first substrate;
- a plurality of scan lines each disposed for a corresponding row of said unit pixels;
- a plurality of data lines each disposed for a corresponding column of said unit pixels;
- a drive circuit for driving said scan lines and said data lines to activate said pixel EL elements through respective said pixel circuits;
- wherein said drive circuit, including said scan lines, said data lines and said pixel circuits, is mounted on said second substrate;
- wherein said drive circuit and said second substrate are mounted at a rear surface of said first substrate;
- and
- wherein said second substrate is connected to said first substrate through bumps formed on rear terminals located on said rear surface of said first substrate.
A method for fabricating an active-matrix-driven organic EL display device comprising the steps of:
- forming a plurality of cathodes on a front surface of a first substrate;
- forming an organic thin film on each of said cathodes;
- forming a common anode on said organic thin films;
- forming on a rear surface of said first substrate a plurality of rear electrodes connected to said anode and said cathodes through via holes and interconnects formed in said first substrate;
- using bumps formed on rear terminals, said terminals connected to said rear surface of said first substrate to mount a second substrate on said rear surface of said first substrate;
- mounting on said second substrate a drive IC that includes a drive circuit and a plurality of pixel circuits each corresponding to one of said pixel EL elements;
- and
- using said drive circuit to drive said pixel EL elements through said respective pixel circuits.
Dependencies are inferred from the claim text.