Transparent OLED Substrate Shared Electrode Grid Design
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Solution Overview
Problem
Current OLED display technologies face challenges in optimizing the arrangement of electrodes and signal lines, which affects the light transmission rate and uniformity of the display, particularly in transparent display regions.
Innovation Solution
The display substrate design includes a configuration where the number of first electrodes is greater than the number of second electrodes, allowing at least two sub-pixels to share one second electrode, and power supply signal lines are arranged in a grid-shaped structure to reduce voltage drop and enhance display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each sub-pixel is equipped with independent second electrodes, then the electrical connection reliability is improved, but the light transmission rate decreases due to increased total electrode area
Solution Approach 1:
Adjacent second electrodes are merged into a shared common electrode structure. Multiple sub-pixels share the same second electrode, reducing the total number of electrodes and their cumulative area, thereby increasing light transmission rate while maintaining electrical connection through the shared structure
Solution Approach 2:
The shared second electrode serves multiple sub-pixels simultaneously, performing the same electrical function for multiple components. This universal electrode structure reduces redundancy while maintaining the necessary electrical connections for all connected sub-pixels
2Manufacturing precision
If power supply signal lines are arranged in a grid-shaped structure, then the display uniformity is improved by reducing voltage drop, but the device complexity increases
Solution Approach 1:
The power supply signal lines are segmented into multiple sub-power supply signal lines arranged in a grid pattern. This segmentation allows current to be distributed through multiple parallel paths, reducing voltage drop and improving display uniformity across different regions of the display
Solution Approach 2:
The signal line arrangement transitions from a single-dimensional linear layout to a two-dimensional grid structure. This dimensional change creates multiple current pathways and reduces the electrical distance to different display regions, thereby reducing voltage drop and improving uniformity
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 configuration increases the light transmission rate and improves the uniformity of the display effect by reducing the total area of second electrodes and optimizing the arrangement of power supply signal lines.
Implementation Method 1
The organic light-emitting element includes a first electrode, a second electrode and an organic light-emitting material between the first electrode and the second electrode
Data Source
AI summary
A display substrate, a display panel and a display apparatus are provided. The display substrate includes a display region and at least partial region of the display region is a transparent display region. The display substrate includes a plurality of pixels located in the transparent display region. The pixels each include a plurality of sub-pixels and the sub-pixels each include an organic light-emitting element (220) and a pixel circuit (221). The organic light-emitting element (220) includes a first electrode, a second electrode and an organic light-emitting material between the first electrode and the second electrode. The first electrodes of the sub-pixels are electrically connected with the pixel circuits (221); and a number of the first electrodes is greater than a number of the second electrodes. The display substrate is further provided with first power supply signal lines (VDD1) connected with the pixel circuits and second power supply signal lines (VSS) connected with the second electrodes. The first power supply signal lines (VDD1) include first sub-power supply signal lines (VDD11) extending along a first direction and second sub-power supply signal lines (VDD12) extending along a second direction; and/or, the second power supply signal lines (VSS) include third sub-power supply signal lines (VSS1) extending along the first direction and fourth sub-power supply signal lines (VSS2) extending along the second direction.