OLED Display Light Emission Signal Segmentation
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Solution Overview
Problem
Organic light emitting diode (OLED) displays experience signal interference between adjacent light emission signal generators, leading to signal drops and changes in signal magnitude, which affect the accuracy and reliability of the light emission signal.
Innovation Solution
The implementation of a dual high voltage transmission line system, where odd-numbered and even-numbered light emission signal stages are connected to separate high voltage transmission lines, with a four horizontal period difference in voltage application, to reduce signal interference and maintain signal accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single high voltage transmission line is used for all light emission signal stages, then the device complexity is reduced, but signal interference occurs between adjacent stages causing signal drops and changes in signal magnitude
Solution Approach 1:
The single high voltage transmission line is segmented into multiple separate transmission lines (first high voltage transmission line and second high voltage transmission line), with each line serving specific light emission signal stages. This segmentation prevents signal interference between adjacent stages while maintaining manageable device complexity through systematic organization.
Solution Approach 2:
The patent introduces separate high voltage transmission lines as intermediary elements between the light emission signal generator and adjacent light emission signal stages. These intermediaries isolate signal paths, preventing direct interference while still enabling voltage transmission to the required stages.
2Reliability
If separate high voltage transmission lines are used for odd and even light emission signal stages, then signal interference is reduced, but the device complexity increases
Solution Approach 1:
The patent applies asymmetric configuration by differentiating transmission lines based on stage numbering (odd vs. even stages). The first high voltage transmission line serves odd-numbered stages while the second serves even-numbered stages, creating a systematic asymmetric structure that reduces interference while maintaining organizational simplicity.
Solution Approach 2:
The patent implements periodic action by applying high voltage to light emission signal stages in a sequential periodic manner with a four horizontal period difference. This periodic voltage application pattern, combined with the separate transmission lines, stabilizes signals by preventing simultaneous interference while maintaining manageable device complexity.
Data Source
AI summary
An organic light emitting diode (OLED) display includes: a display area comprising a plurality of pixel rows configured to emit light in response to a light emission signal; a light emission signal generator at the periphery of the display area, and including a plurality of light emission signal stages connected to the plurality of pixel rows; and a first high voltage transmission line and a second high voltage transmission line connected to the light emission signal generator, wherein the first high voltage transmission line is connected to a plurality of odd-numbered light emission signal stages among the plurality of light emission signal stages, and the second high voltage transmission line is connected to a plurality of even-numbered light emission signal stages among the plurality of light emission signal stages.