Axisymmetric OLED Panel Layout for Uniform Light Emission
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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 principle by introducing a symmetry axis in the first metal layer structure. The longitudinal traces are arranged symmetrically with respect to this axis, creating an asymmetric overall structure that compensates for the asymmetric placement of pixel defining layers and electrode layers. This asymmetric design ensures uniform light emission and reflection characteristics, preventing color shift and color separation while maintaining manufacturing simplicity.
2Loss of energy
If second power signal line is integrated in first metal layer, then power consumption is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges the second power signal line with the first metal layer structure. The longitudinal traces in the first metal layer serve dual purposes: they function as structural elements for the asymmetric design and simultaneously act as power signal lines. This merging reduces the number of separate components, simplifying the overall structure and reducing power consumption while the symmetric arrangement provides self-alignment that eases manufacturing precision requirements.
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.