OLED Panel Signal Line Sharing for High PPI
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Solution Overview
Problem
Current organic light-emitting display panels face challenges in achieving high PPI (Pixels per Inch) due to the large number of longitudinal wires required, which complicates the implementation of high-quality, portable display screens.
Innovation Solution
The organic light-emitting display panel design reduces the number of data voltage signal lines and reference voltage signal lines by allowing adjacent pixel driving circuits to share these lines, with a control signal line system that manages the reference and data voltage signals efficiently, thereby reducing power consumption and load on the signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each pixel driving circuit has dedicated data voltage signal lines and reference voltage signal lines extending along the column direction, then each pixel circuit can receive stable voltage signals, but the number of longitudinal wires increases making high PPI implementation difficult
Solution Approach 1:
Adjacent pixel driving circuits share common data voltage signal lines and reference voltage signal lines. Specifically, pixel driving circuits in the same row share a data voltage signal line, and pixel driving circuits in alternating rows share reference voltage signal lines (odd rows share one set, even rows share another set), thereby reducing the total number of longitudinal wires from 2N to N+1 while maintaining signal stability through proper timing control
Solution Approach 2:
The patent introduces dynamic control through control signal lines that enable pixel driving circuits to be selectively activated in different rows at different times. This dynamic row-by-row activation allows multiple pixel circuits to share the same signal lines without interference, as only one row is active at any given time, thus maintaining signal integrity while reducing wire count
2Reliability
If more data voltage signal lines and reference voltage signal lines are used to improve signal quality, then display uniformity can be maintained, but power consumption and load on signal lines increase
Solution Approach 1:
By merging signal lines so that multiple pixel driving circuits share the same data voltage signal line and reference voltage signal line, the total number of active signal lines is reduced. This reduces the overall power consumption and load on the signal line distribution system while maintaining display uniformity through the dynamic row activation mechanism that prevents signal interference
Solution Approach 2:
The patent employs periodic row-by-row activation where control signals enable different rows at different time intervals. During each period, only one row of pixel driving circuits is active and receiving signals, while other rows are inactive. This periodic activation reduces the instantaneous load and power consumption on the shared signal lines compared to having all lines active simultaneously
Data Source
AI summary
The present disclosure discloses an organic light-emitting display panel and a driving method thereof, and an organic light-emitting display device. The organic light-emitting display panel comprises a pixel array, a plurality of pixel driving circuits, a plurality of reference voltage signal lines and a plurality of data voltage signal lines. The plurality of pixel driving circuits include a first, second and third pixel driving circuits, the first pixel driving circuit and the second pixel driving circuit are adjacent to each other in a row direction of the pixel array, and the second pixel driving circuit and the third pixel driving circuit are adjacent to each other in the row direction of the pixel array. The first pixel driving circuit and the second pixel driving circuit share one reference voltage signal line, and the second pixel driving circuit and the third pixel driving circuit share one data voltage signal line.