Display Panel Touch Electrode Shielding for Light Emission Efficiency
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Solution Overview
Problem
Existing display technologies face challenges in achieving efficient light emission and effective color mixing due to issues with capacitance-conductive portions and touch electrodes in electroluminescent display panels.
Innovation Solution
The display panel incorporates a transistor array layer with capacitance-conductive portions that overlap with data and power supply signal lines, and touch electrodes with auxiliary overlap areas that shield these capacitance-conductive portions, improving light emission efficiency and color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If capacitance-conductive portions are placed to overlap with data and power supply signal lines to improve light emission efficiency, then light emission efficiency is improved, but light emitting interference increases
Solution Approach 1:
A shielding layer is introduced as an intermediary component between the capacitance-conductive portions and the signal lines. This shielding layer acts as a mediator that blocks the harmful electromagnetic interference while allowing the beneficial capacitive coupling to persist, thus resolving the contradiction between improving light emission efficiency and reducing light emitting interference
Solution Approach 2:
The shielding function is extracted as a separate, dedicated component (shielding layer) rather than being integrated into the capacitance-conductive portions themselves. This separation allows the capacitance-conductive portions to focus on improving light emission efficiency while the shielding layer independently handles the interference reduction
2Object-generated harmful factors
If touch electrodes are added to shield capacitance-conductive portions to reduce light emitting interference, then light emitting interference is reduced, but device complexity increases
Solution Approach 1:
The touch electrodes are designed to serve multiple functions simultaneously: they provide touch sensing capability and also act as shielding elements for the capacitance-conductive portions. By making the touch electrodes multi-functional, the patent avoids adding separate shielding components, thus reducing device complexity while still achieving interference reduction
Solution Approach 2:
The shielding function is merged with the touch electrode structure. Instead of adding a separate shielding layer specifically for interference reduction, the patent combines the shielding function with the existing touch electrodes, allowing one component to fulfill both touch sensing and electromagnetic shielding roles
3Stability of the object's composition
If opening region areas are reduced to improve color mixing, then color mixing is improved, but light emission efficiency decreases
Solution Approach 1:
The patent applies different opening region areas to different color sub-pixels based on their specific requirements. By optimizing the opening region area for each color (red, green, blue sub-pixels) according to its local characteristics and viewing angle requirements, the patent achieves good color mixing for each color while maintaining overall light emission efficiency across the display
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 enhances light emission efficiency by reducing light emitting interference and improves color mixing by effectively shielding capacitance-conductive portions, leading to better display performance.
Implementation Method 1
touch electrodes with auxiliary overlap areas that shield these capacitance-conductive portions
Implementation Method 2
the transistor array layer includes a plurality of capacitance-conductive portions
Data Source
AI summary
The disclosure provides a display panel and a display device. The display panel includes: a base substrate, a transistor array layer, a pixel defining layer, touch electrodes. The area of opening region of first color sub-pixel is smaller than that of opening region of third color sub-pixel, the area of opening region of second color sub-pixel is smaller than that of opening region of third color sub-pixel. An orthogonal projection of second capacitor in first color sub-pixel and an orthogonal projection of touch electrodes have a first auxiliary overlap area, an orthogonal projection of second capacitor in second color sub-pixel and orthogonal projection of the touch electrodes have a second auxiliary overlap area, an orthogonal projection of second capacitor in third color sub-pixel and orthogonal projection of touch electrodes have a third auxiliary overlap area. The first and/or second auxiliary overlap area is larger than the third auxiliary overlap area.