Display Panel Compensation Unit Reduces Black Edge Area
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Solution Overview
Problem
Conventional display devices experience non-uniform display and a large black edge due to the compensation unit occupying a significant area in the winding region, causing voltage drops in scanning lines to differ between opening and non-opening regions.
Innovation Solution
A display panel design that includes a transition region with compensation units in the invalid pixel region, allowing these units to replace invalid pixels and reduce the area of the winding region by arranging data lines on different metal layers, thereby minimizing the black edge and ensuring uniform voltage drops across scanning lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compensation unit is provided in the winding region to compensate for voltage drop, then non-uniform display is prevented, but the area of the winding region increases resulting in a large black edge
Solution Approach 1:
The patent applies dimensionality change by moving the compensation unit from the winding region (2D plane) to the third dimension (under the display panel). The compensation unit is formed in a third dimension under the display panel, allowing it to compensate for voltage drop without occupying horizontal space in the winding region, thus reducing the black edge area while maintaining display uniformity.
Solution Approach 2:
The compensation unit is nested under the display panel structure, integrated into the lower layers beneath the display pixels. This nesting allows the compensation functionality to be embedded within the existing panel structure without adding external complexity or increasing the visible black edge area.
2Reliability
If the compensation unit occupies a large area of the winding region, then voltage drop compensation is achieved, but the screen-to-body ratio is reduced
Solution Approach 1:
By relocating the compensation unit to the third dimension (under the panel) rather than expanding it in the winding region, the patent maintains the screen-to-body ratio while achieving effective voltage compensation. The compensation unit operates from a different spatial plane, eliminating the trade-off between compensation effectiveness and screen area.
3Device complexity
If data lines are arranged on a single metal layer, then routing is simplified, but the winding region area increases to accommodate compensation units
Solution Approach 1:
The patent utilizes vertical stacking of metal layers to route data lines, transforming a two-dimensional routing problem into a three-dimensional solution. By distributing data lines across multiple metal layers, the winding region area is reduced while maintaining routing functionality, as lines can be routed vertically through different layers rather than requiring extensive horizontal space.
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 solution effectively reduces the area of the transition region and black edge between the display and opening regions, preventing non-uniform display by compensating for voltage drops in scanning lines, thus enhancing display uniformity.
Implementation Method 1
the compensation unit at least includes a compensation wiring on the second metal layer, and a projection of the compensation wiring on the substrate overlaps with a projection of at least one of the one or more first scanning lines on the substrate
Data Source
AI summary
A display panel and a display apparatus. The display panel includes a display region, an opening region, and a transition region between the display region and the opening region, the display panel includes: a substrate; a first metal layer on a side of the substrate, wherein the first metal layer comprises one or more first scanning lines; a second metal layer on a side of the first metal layer away from the substrate; and a source drain layer arranged on a side of the second metal layer away from the first metal layer.