Organic Light Emitting Display Panel Wiring Width Expansion
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Solution Overview
Problem
Conventional organic light emitting display panels experience uneven brightness due to concentrated current in via connection areas, leading to localized overheating and reduced light emitting efficiency.
Innovation Solution
The design features a display panel with gate, data, and anode wirings that gradually increase in width from the display region to the non-display region, with trapezoidal shapes and overlapping regions connected through slots instead of through holes, reducing resistance and mitigating heat generation and brightness unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If via connection areas are used to connect wirings, then connection is achieved, but current becomes concentrated causing localized overheating and brightness unevenness
Solution Approach 1:
The via connection area is segmented into multiple smaller via holes distributed across an expanded connection region. This segmentation distributes the current flow across multiple pathways, preventing concentration of current in a single location and thereby reducing localized overheating while maintaining reliable electrical connection between wiring layers.
2Loss of energy
If wiring width is increased to reduce resistance, then heat generation is reduced, but display region area is compromised
Solution Approach 1:
The wiring structure implements local quality by having different widths in different regions: the wiring in the display region maintains a standard width to preserve display area, while the wiring in the non-display region is expanded to reduce resistance and heat generation. This localized modification allows energy loss reduction without compromising the active display region.
Solution Approach 2:
The solution moves the wiring expansion to the non-display region, effectively using the non-display area as an additional dimension for optimizing electrical properties. By extending wiring width in the non-display region rather than in the display region, the patent reduces resistance and heat generation without encroaching on the display area.
3Illumination intensity
If wiring width is increased to distribute current, then brightness uniformity improves, but manufacturing complexity increases
Solution Approach 1:
The wiring structure employs asymmetry by having different widths in different regions - narrower in the display region and wider in the non-display region. This asymmetric design optimizes current distribution to improve brightness uniformity while the gradual transition between widths simplifies manufacturing compared to abrupt changes.
Solution Approach 2:
The patent applies parameter changes by modifying the wiring width parameter along the length of the wiring. The width transitions from a first value in the display region to a second, larger value in the non-display region. This continuous or stepped parameter change optimizes electrical performance and brightness uniformity while remaining manufacturable through standard semiconductor fabrication processes.
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 effectively reduces heat generation and improves brightness uniformity by distributing current more evenly across the panel, enhancing light emitting efficiency.
Implementation Method 1
the widths of the first wirings of the gate wiring, the data wiring and the anode wiring are gradually increased in the first direction, gradually reducing the resistance of the first gate wiring, the first data wiring, and the first anode wiring in the first direction, thereby gradually mitigating ununiform heat generated by the first gate wiring, the first data wiring and the first anode wiring
Data Source
AI summary
An organic light emitting display panel includes a display region and a non-display region, the display region provided with a gate wiring, a data wiring, an anode wiring and a cathode, wherein the cathode is disposed in a central region of the display region, the gate wiring, the data wiring, and the anode wiring are disposed along an edge region of the display region; the gate wiring has a first gate wiring parallel to a first direction, the data wiring has a first data wiring parallel to the first direction, the anode wiring has a first anode wiring parallel to the first direction, the first direction is a direction from the display region to the non-display region, a width of at least one of the first gate wiring, the first data wiring, and the first anode wiring, is gradually increased in the first direction.