Display Substrate Dummy Power Lines for AMOLED Brightness Stability
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Solution Overview
Problem
Active matrix organic light-emitting diode (AMOLED) displays face issues with brightness stability due to voltage disturbances in the power supply, which affect the display effect.
Innovation Solution
The implementation of dummy sub-pixels and power lines in the non-display region, connected to the power lines in the display region, forms capacitors with the common power line, stabilizing the power supply voltage and enhancing brightness stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dummy sub-pixels and power lines are added in the non-display region, then power supply voltage stability is improved, but device complexity increases
Solution Approach 1:
The patent creates dummy sub-pixels and dummy power lines in the non-display region that are electrically connected to the real sub-pixels and power lines. These dummy structures are copies that replicate the electrical characteristics without the light-emitting components, allowing the formation of capacitors to stabilize voltage without adding functional display elements.
Solution Approach 2:
The dummy power lines serve multiple functions: they act as capacitors to stabilize power supply voltage, provide electrical connection pathways, and maintain the structural integrity of the pixel array in the non-display region. This multi-functionality reduces the need for separate voltage stabilization components.
2Stability of the object's composition
If dummy power lines are connected to power lines, then brightness stability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the dummy power lines with the real power lines through electrical connections in the non-display region. This merging allows the dummy structures to function as extended capacitors that stabilize the power supply voltage for the entire display region, including the display area, thereby improving brightness stability.
Solution Approach 2:
The dummy power lines are pre-configured in the non-display region during the manufacturing process, establishing electrical connections before the display region is fully assembled. This preliminary action ensures that the capacitor effect is already in place to stabilize voltage fluctuations during operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves the stability and uniformity of the power supply voltage, leading to enhanced brightness stability and display quality in AMOLED panels.
Implementation Method 1
forms capacitors with the common power line, stabilizing the power supply voltage
Data Source
AI summary
A display substrate includes: a base substrate including a display region and a non-display region surrounding the display region; a plurality of sub-pixels in the display region; a plurality of power lines in the display region, the plurality of power lines extending along a first direction, and being electrically connected to the plurality of sub-pixels and being configured to provide power signals for the plurality of sub-pixels; a plurality of dummy sub-pixels in the non-display region on one side of the display region along the first direction; and a plurality of dummy power lines in the non-display region, the plurality of dummy power lines extending along the first direction, the plurality of dummy power lines and the plurality of dummy sub-pixels being on the same side of the display region.