High resolution pixel architecture
AssigneeIgnis Innovation Inc.
InventorsGholamreza Chaji, Vasudha Gupta, Arokia Nathan
Life of this patent
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Abstract
A high resolution pixel using organic light emitting devices (OLEDs) in a staggered arrangement to increase aperture ratio is disclosed. The arrangement may be used with both bottom and top emission type pixels. The arrangement includes a first organic light emitting device emitting light of a first color. A second organic light emitting device emitting light of a second color is located in a bottom row under the first organic light emitting device. A third organic light emitting device emitting light of a third color is located in a top row with the first organic light emitting device.
Claims14
An integrated circuit for a color pixel having multiple sub-pixels arranged in rows and columns, the circuit comprising:
- a first organic light emitting device having front and rear surfaces and emitting light of a first color from the front surface;
- a second organic light emitting device having front and rear surfaces and emitting light of a second color from the front surface, the first and second organic light emitting devices located in different rows and columns;
- a third organic light emitting device having front and rear surfaces and emitting light of a third color from the front surface, said third organic light emitting device located in the same row as one of said first and second organic light emitting devices, and in the same column as the other of said first and second organic light emitting devices;
- and
- a plurality of drive transistors being located behind the rear surfaces of the first, second and third organic light emitting devices;
- and
- data lines extending across the rear surfaces of the organic light emitting devices.
An integrated circuit for a color pixel having multiple sub-pixels arranged in rows and columns, the circuit comprising:
- a first organic light emitting device emitting light of a first color;
- a second organic light emitting device emitting light of a second color, the first and second organic light emitting devices located in different rows and columns;
- a third organic light emitting device emitting light of a third color, said third organic light emitting device located in the same row as one of said first and second organic light emitting devices, and in the same column as the other of said first and second organic light emitting devices;
- a drive transistor disposed on the light-emitting side of at least one of said organic light emitting devices;
- a reflective common electrode on the opposite side of said at least one organic light emitting device from said light-emitting side;
- and
- a reflector layer disposed between said drive transistor and the light-emitting side of said at least one of the organic light emitting devices, the reflector layer having a reflective surface facing the organic light emitting device and forming an aperture, said reflective surface being shaped to reflect light emitted from said light-emitting side of the organic light emitting device back toward said reflective common electrode at angles that cause said light to be reflected from said common electrode through said aperture.
A color display comprising:
- a controller;
- an array of pixels coupled to the controller to display images, wherein each pixel includes:
- a first organic light emitting device emitting light of a first color;
- a second organic light emitting device emitting light of a second color, the first and second organic light emitting devices located in different rows and columns;
- a third organic light emitting device emitting light of a third color, said third organic light emitting device located in the same row as one of said first and second organic light emitting devices, and in the same column as the other of said first and second organic light emitting devices;
- first, second and third drive transistors coupled to the first, second and third organic light emitting devices, respectively;
- wherein the organic light emitting devices are located on a substrate and the drive transistors are fabricated on the rear surfaces of said organic light emitting devices;
- and
- data lines fabricated behind the organic light emitting devices.
An integrated circuit for a pixel, the integrated circuit comprising:
- a reflective common electrode layer;
- an organic light emitting device located on the common electrode layer, the organic light emitting device including an emission surface;
- a drive transistor disposed on part of the emission surface side of said organic light emitting device;
- and
- a reflector layer disposed between the drive transistor and the emissive surface side of said organic light emitting device, the reflector layer including an aperture over the emission surface and a reflective surface facing the emission surface, the reflective surface being shaped to reflect light emitted from the light emitting surface back toward said reflective common electrode at angles that cause said light to be reflected from said common electrode through said aperture.
Dependencies are inferred from the claim text.