Integrated multicolor organic led array

• US 5,424,560 A
• Filed: 05/31/1994
• Issued: 06/13/1995
• Est. Priority Date: 05/31/1994
• Status: Expired due to Term

• Current Assignee: Universal Display Corporation
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Harvey, Thomas B. III, Zhu, Xiaodong T., Norman, Michael P.
• Primary Examiner(s): MINTEL, WILLIAM A
• Application Number:
  US08/251,440
• Time in Patent Office: 378 Days
• Field of Search: 257/88, 257/89, 257/90, 257/91, 257/92, 257/93, 257/40, 257/103
• US Class Current: 257/40
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: Y10S 148/099 LED, multicolor

Abstract

An integrated multicolor organic LED array formed by providing a negative layer and patterning a plurality of different color LED organic layers, one at a time, on the negative layer to form a plurality of different color LEDs in a plurality of areas of a selected array. A first color LED organic layer is patterned on the negative layer in first areas and to define additional areas for additional LEDs laterally separated from the first color LEDs and a final color LED organic layer is deposited in final areas and on previously patterned layers to form a plurality of final color LEDs. Transparent positive contacts are then formed on the final color LED layer in the first and final areas so as to form positive contacts to the first and the final color LEDs.

Claims

1. Integrated multicolor organic layers for an LED array comprising:

a negative electrical layer having a surface; and

a plurality of different color LED organic layers, deposited one at a time, positioned on the surface of the negative electrical layer to form a plurality of different color LEDs in a plurality of areas of a selected array, a first color LED organic layer of the plurality of organic layers being patterned on the surface of the negative electrical layer in first areas and to define additional areas in the selected array for additional LEDs laterally separated from the first color LEDs in the first areas and a final color LED organic layer of the plurality of organic layers being deposited on the surface in defined final areas of the additional areas and on previously patterned color organic layers to form a plurality of final color LEDs in the defined final areas of the selected array.

2. Integrated multicolor organic layers for an LED array as claimed in claim 1 wherein the plurality of different color LED organic layers are positioned in order of wavelength of the color of the layer, with the longest wavelength being deposited first.

3. An integrated multicolor organic LED array comprising:

a negative electrical layer having a surface;

a plurality of different color LED organic layers positioned on the surface of the negative electrical layer to form a plurality of different color LEDs in a plurality of areas of a selected array, a first color LED organic layer of the plurality of organic layers being patterned on the surface of the negative electrical layer in a first area and to define additional areas in the selected array for additional LEDs laterally separated from the first color LEDs in the first areas and a final color LED organic layer of the plurality of organic layers being deposited on the surface in defined final areas of the additional areas and on previously patterned color organic layers to form a plurality of final color LEDs in the defined final areas of the selected array; and

first transparent positive electrical contacts on the final color LED layer in the first areas so as to form positive electrical contacts to the plurality of first color LEDs and final transparent positive electrical contacts on the final color LED layer in the final areas so as to form positive electrical contacts to the plurality of final color LEDs.

4. An integrated multicolor organic LED array comprising:

a negative electrical layer having a surface;

a first color LED organic layer positioned on the surface of the negative electrical layer to form a plurality of first color LEDs in first areas of a selected array, the first color LED organic layer being patterned to define second areas in the selected array for additional LEDs laterally separated from the first color LEDs in the first areas;

a second color LED organic layer positioned on the surface in the defined second areas and on the first color organic layer to form a plurality of second color LEDs in the defined second areas of the selected array, the second color organic layer being patterned to define third areas in the selected array for further additional LEDs laterally separated from the first color LEDs in the first areas and the second color LEDs in the second areas;

a third color LED organic layer positioned on the surface in the defined third areas and on the first and second color organic layers to form a plurality of third color LEDs in the defined third areas of the selected array;

first transparent positive electrical contacts positioned on the third color LED layer in the first areas so as to form positive electrical contacts to the plurality of first color LEDs;

second transparent positive electrical contacts positioned on the third color LED layer in the second areas so as to form positive electrical contacts to the plurality of second color LEDs; and

third transparent positive electrical contacts positioned on the third color LED layer in the third areas so as to form positive electrical contacts to the plurality of third color LEDs.

5. An integrated multicolor organic LED array as claimed in claim 4 wherein the first color LED organic layer includes a red LED layer.

6. An integrated multicolor organic LED array as claimed in claim 5 wherein the second color LED organic layer includes a green LED layer.

7. An integrated multicolor organic LED array as claimed in claim 6 wherein the third color LED organic layer includes a blue LED layer.