Organic Light Emitting Display Device Shared Reference Line Sensing

The patent merges the reference lines of multiple pixels into a shared common reference line. Specifically, multiple pixels share a single reference line that connects to a common sensing transistor, allowing threshold voltage sensing to be performed collectively for multiple pixels rather than requiring separate reference lines for each pixel. This reduces the total number of reference lines and source driver channels while maintaining the capability to sense and compensate for threshold voltage variations across pixels.

The patent implements a universal reference line structure where a single reference line serves multiple pixels simultaneously. The common reference line and shared sensing transistor act as a multi-functional component that performs threshold voltage sensing for multiple pixels, eliminating the need for pixel-specific reference lines. This universal approach simplifies the source driver design and manufacturing process while still achieving uniform picture quality through effective threshold voltage compensation across all shared pixels.