OLED Display Panel Magnetic Field Crosstalk Suppression
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Solution Overview
Problem
Large size OLED display panels using white light OLED with color filters suffer from cross color or crosstalk, leading to unsaturated monochrome displays and reduced color gamut due to transverse charge transmission across adjacent pixels.
Innovation Solution
Incorporating a magnetic field in the pixel regions with a direction forming an included angle with the drive substrate, and using a current coil connected to the drive substrate to generate a magnetic field that inhibits transverse charge transmission, thereby preventing crosstalk and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If white light OLED with color filters is used to generate red, green and blue light, then the display panel can achieve full-color display, but cross color or crosstalk occurs making monochrome display unsaturated and reducing color gamut
Solution Approach 1:
The patent extracts and eliminates the problematic color filter layer from the display structure. By using separate red, green, and blue light-emitting OLEDs for each pixel without color filters, the invention removes the source of crosstalk and color contamination, thereby achieving saturated monochrome displays and improved color gamut while maintaining full-color display capability
Solution Approach 2:
The patent segments the display into independent red, green, and blue pixel units, each with its own light-emitting OLED. This segmentation prevents light from adjacent pixels of different colors from interfering with each other, eliminating crosstalk and improving both color saturation and display versatility
2Manufacturing precision
If magnetic field is applied to inhibit transverse charge transmission, then crosstalk is reduced and color saturation is improved, but device complexity increases due to additional current coil structure
Solution Approach 1:
The patent merges the magnetic field generation function with the existing pixel electrode structure by integrating current coils into the pixel definition layer. This combination approach generates the necessary magnetic fields to inhibit transverse charge transmission and improve color saturation without adding separate, complex magnetic field generation systems
Solution Approach 2:
The patent introduces a magnetic field as an intermediary mechanism to control charge carrier movement. The magnetic field acts as a mediator that inhibits transverse charge transmission between adjacent pixels, improving color saturation without requiring direct physical barriers or complex structural modifications
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 magnetic field reduces brightness of adjacent pixels, increases the path length of charge carriers, and improves color saturation and gamut, effectively addressing the issues of crosstalk and display performance.
Implementation Method 1
a magnetic field disposed in at least one of the pixel regions, a direction of the magnetic field forming an included angled with a plane on which the drive substrate is located
Implementation Method 2
a current coil disposed around the pixel region within the pixel defining layer, both ends of the current coil are electrically connected to the drive substrate, the drive substrate is configured to provide a current to the current coil corresponding to the pixel region
Data Source
AI summary
A display panel includes a drive substrate, a first electrode disposed on the drive substrate and located in a pixel region, and a pixel defining layer disposed on the first electrode and defining the pixel region. The display panel further includes a light-emitting structure layer disposed on the pixel defining layer, a second electrode disposed on the light-emitting structure layer, and a magnetic field disposed at least one pixel region, wherein a direction of the magnetic field forms an included angle with a plane of the drive substrate.