Very high resolution AMOLED display

• US 9,379,169 B2
• Filed: 09/14/2012
• Issued: 06/28/2016
• Est. Priority Date: 09/14/2012
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Hack, Michael, Weaver, Michael Stuart, Brown, Julia J., So, Woo-Young
• Primary Examiner(s): Tran, Long K
• Assistant Examiner(s): Tran, Dzung
• Application Number:
  US13/617,791
• Publication Number:
  US 20140077163A1
• Time in Patent Office: 1,383 Days
• Field of Search: 257/40, 257/88, 257/59, 257/532, 438/34
• US Class Current: 1/1
• CPC Class Codes: G09G 2320/0214 with crosstalk due to leakage current of pixel switch in active matrix panels
• CPC Class Codes: G09G 3/3258 with pixel circuitry controlling the voltage across the light-emitting element
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs

Abstract

OLED displays having a resolution of 300 dpi, 400 dpi, or greater are provided. Devices as disclosed may use one or more transistors, such as metal oxide transistors, which have a leakage current of not more than about 10⁻¹⁵ A/μm. Displays having sub-pixels with a largest dimension on the order of 60 μm are also provided.

Claims

1. A device comprising:

a plurality of organic light-emitting devices arranged to form a plurality of pixels having a combined resolution of at least 400 dpi; and

a circuit configured to control at least one of the plurality of organic light-emitting devices, said circuit comprising at least one transistor having a leakage current of not more than about 10<sup>−

15</sup> A/μ

m to maintain a data voltage without reliance upon a gate-collector capacitor,

wherein the at least one of the plurality of organic light-emitting devices controlled by the circuit comprises a sub-pixel, the sub-pixel having a largest dimension of not more than about 60 μ

m.

2. A device as recited in claim 1, wherein the circuit comprises no more than two transistors.

3. A device as recited in claim 2, wherein the at least one transistor comprises a metal oxide as an active layer.

4. A device as recited in claim 2, further comprising a compensation driver disposed outside an active area of the organic light-emitting device.

5. A device as recited in claim 4, wherein the at least one transistor comprises a metal oxide as an active layer.

6. A device as recited in claim 1, wherein the at least one transistor comprises a metal oxide as an active layer.

7. A device as recited in claim 1, wherein the device comprises a device type selected from the group consisting of:

a full-color display, a flexible display in a consumer device, a mobile phone, a pad computer, a smartphone, a portable computer, a monitor, a television, and a consumer device including a flexible display.

8. A device as recited in claim 1, wherein the at least one transistor has a leakage current in the range of about 10⁻

15 A/μ

m to about 10<sup>−

24</sup> A/μ

m.

9. An active matrix organic light emitting display, comprising:

at least one Organic Light Emitting Device (OLED);

a plurality of pixels, each pixel being independently addressable by a control circuit; and

at least one OLED switching transistor having a leakage current of not more than about 10<sup>−

15</sup> A/μ

m to maintain a data voltage without reliance upon a gate-collector capacitor,

wherein the display has a combined resolution of at least 400 dpi, and

wherein each pixel comprises a plurality of sub-pixels, each sub-pixel having a largest dimension of not more than about 60 μ

m.

10. A display as recited in claim 9, wherein the control circuit comprises at least one transistor having a leakage current of not more than about 10⁻

15 A/μ

m.

11. A display as recited in claim 10, wherein the circuit comprises no more than two transistors.

12. A display as recited in claim 9, wherein the at least one transistor has a leakage current in the range of about 10⁻

15 A/μ

m to about 10<sup>−

24</sup> A/μ

m.