OLED Panel Electrode Symmetry for Uniform Color Output
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Solution Overview
Problem
Conventional OLED displays suffer from color shift and color separation due to improper design of the electrode layers, leading to uneven light emission and reflection, which affects image quality.
Innovation Solution
The display panel is designed with an axisymmetric structure for the first metal layer, first electrode layer, pixel defining layer, and second electrode layer, ensuring symmetrical light emission and reflection by using a symmetry axis for the longitudinal traces, and the second power signal line is integrated in the first metal layer to reduce voltage drop and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrode layer design is used, then manufacturing is simpler, but color shift and color separation occur due to uneven light emission and reflection
Solution Approach 1:
The patent applies asymmetry in reverse by creating a symmetric axisymmetric structure. The first metal layer, first electrode layer, pixel defining layer, and second electrode layer are all designed with rotational symmetry around a central axis. This symmetric configuration ensures that light emission and reflection are uniform in all directions, eliminating color shift and color separation while maintaining manufacturing precision.
Solution Approach 2:
The patent introduces a new dimensional perspective by designing the layers with rotational symmetry around a vertical axis rather than traditional planar symmetry. This three-dimensional symmetric arrangement ensures uniform light distribution in all angular directions, solving the problem of uneven light emission that causes color shift and color separation.
2Loss of energy
If second power signal line is integrated in first metal layer, then voltage drop and power consumption are reduced, but trace routing complexity increases
Solution Approach 1:
The patent merges the second power signal line with the first metal layer, combining two functional elements into a single structural layer. This integration reduces the number of separate conductive paths, minimizing voltage drop and power consumption while simplifying the overall electrical architecture. The symmetric axisymmetric design of the traces in the first metal layer ensures uniform current distribution, further reducing power loss.
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 axisymmetric structure ensures uniform light emission and reflection, preventing color shift and separation, while the second power signal line reduces resistance and power consumption, enhancing image quality and efficiency.
Implementation Method 1
Organic light emitting diode (OLED) displays have become a research hotspot because of its advantages such as self illumination
Data Source
AI summary
The present disclosure provides a display panel and a display device. The display panel includes: a base substrate, on which a first metal layer and a second metal layer are stacked; and organic light emitting diode devices on a side, away from the base substrate, of the first metal layer. The first metal layer includes a power signal line. The power signal line is electrically connected with the second electrode layer in a peripheral area. Each organic light-emitting diode device includes a first electrode layer, a light emitting layer and a second electrode layer which are sequentially arranged on the base substrate. The second power signal line includes traces in a first direction and traces in a second direction, and orthographic projections of the traces in the first direction on the base substrate are intersected with orthographic projections of the traces in the second direction on the base substrate.