US 11574990

US Patent 11574990: Concise Summary

Title: Organic light emitting diode display with curved channel region

Assignee: Samsung Display Co Ltd.

Inventors: Se-Ho Kim, Jin-woo Park, Won-Se Lee

Filing Date: June 29, 2022

Issue Date: February 7, 2023

Abstract: An organic light emitting diode (OLED) display includes a substrate, a scan line, a data line, a driving voltage line, a switching thin film transistor (TFT), a driving TFT, and an OLED. A key feature is that the driving semiconductor layer of the driving TFT is bent and lies substantially parallel to the substrate.

Plain-Language Overview of Independent Claims:

Independent Claim 1:
This claim describes an OLED display featuring a substrate with various signal lines (scan, data, driving voltage). It includes a switching TFT connected to the scan and data lines, a driving TFT coupled to the switching TFT's drain electrode, and an OLED connected to the driving TFT's drain electrode. The core innovation here is that the driving TFT has a semiconductor layer that is bent and lies mostly flat, parallel to the display's substrate.

Independent Claim 18:
This claim also outlines an OLED display with a substrate, a scan line, an initialization voltage line, a data line, and a driving voltage line. It specifies a switching TFT, a driving TFT, an OLED, and a light emission control TFT. Additionally, it includes a bypass thin film transistor positioned between the initialization voltage line and the light emission control thin film transistor's drain electrode. This bypass transistor is designed to divert a portion of the driving current from the driving TFT based on a bypass control signal. Similar to Claim 1, the driving semiconductor layer of the driving TFT is bent and in a plane substantially parallel to the substrate.

Uncertainty Regarding CAFC Dockets:
As of April 26, 2026, a search of CAFC 2026 dockets did not yield any specific litigation or proceedings directly involving US patent 11574990. While general patent litigation activity involving Samsung and other entities in 2026 was observed, there is no authoritative information within the search results linking patent 11574990 to any ongoing or concluded CAFC cases this year.