Organic Light Emitting Display Panel Auxiliary Line Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light emitting display panels face inefficiencies in panel testing due to waveform distortion caused by voltage drop (IR drop) and signal delay (RC delay) during the manufacturing process.
Innovation Solution
The implementation of an organic light emitting display panel design that includes a pixel array structure with a test circuit and auxiliary lines, where the auxiliary lines are wider than the signal lines, and are coupled through contact holes, along with a static electricity preventer using diodes or resistors, to reduce signal resistance and prevent static electricity, allowing for efficient testing by supplying test signals to pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If panel testing is performed in mother substrate state with multiple panels concurrently tested, then test efficiency is improved, but waveform distortion occurs due to voltage drop (IR drop) and signal delay (RC delay)
Solution Approach 1:
The data line is divided into multiple segments by introducing auxiliary lines that are selectively connected to pixel rows. This segmentation reduces the length of each line segment, thereby reducing the cumulative resistance and capacitance that cause IR drop and RC delay, while still allowing concurrent testing of multiple panels.
Solution Approach 2:
Auxiliary lines are introduced as intermediary conductors between the data lines and pixel rows. These auxiliary lines act as mediators that reduce the overall resistance path for signal transmission, thereby reducing voltage drop and signal delay during concurrent panel testing.
2Reliability
If auxiliary lines are introduced to reduce signal resistance, then waveform distortion is reduced, but device complexity increases
Solution Approach 1:
The auxiliary lines are designed to serve multiple functions: they reduce signal resistance for improved signal integrity, and they can be selectively connected or disconnected based on testing requirements. This multi-functionality justifies the additional structural elements by providing both signal improvement and operational flexibility.
Solution Approach 2:
The connection between auxiliary lines and pixel rows is made dynamic through selective connection mechanisms (such as switches or configurable connections). This allows the system to adapt the line configuration based on testing needs, reducing complexity when full auxiliary line activation is not required while maintaining signal integrity when needed.
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
This design enhances the testing efficiency by reducing waveform distortion and signal delay, ensuring uniform luminance and color coordination, thus enabling effective panel testing and aging processes.
Implementation Method 1
a waveform distortion caused by a voltage drop (IR drop) and a signal delay (RC delay)
Implementation Method 2
a waveform distortion caused by a voltage drop (IR drop)
Implementation Method 3
a static electricity preventer for preventing formation of static electricity between the first auxiliary line and the second auxiliary line
Data Source
AI summary
An organic light emitting display panel includes a display unit at crossing regions of scan lines and data lines, the display unit including a plurality of pixels configured to display different colors, the pixels being arranged in a pattern; a test circuit configured to apply a test signal to the plurality of pixels, the test circuit being coupled to one end of the data lines; and an auxiliary line adjacent to a plurality of signal lines for supplying the test signal to the test circuit and coupled to at least one of the plurality of signal lines.