Display Power Line Structure for Narrow-Bezel Heat Control
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Solution Overview
Problem
The reduction of the non-display area in display devices leads to increased electrical resistance in power lines, causing heat generation and potential degradation of adjacent pixels.
Innovation Solution
The implementation of a display device with a power line configuration that includes multiple power path portions with varying widths, strategically positioned to distribute the electric current and reduce heat generation in the current concentration area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the non-display area is minimized to enlarge the display area, then the display area is increased, but the width of the power line is reduced causing increased electrical resistance and heat generation
Solution Approach 1:
The power line is divided into multiple power path portions (first power path portion, second power path portion, third power path portion) with different widths. This segmentation allows current to be distributed across multiple paths rather than concentrated in a single narrow line, reducing heat generation while maintaining a minimized non-display area.
Solution Approach 2:
Different portions of the power line are assigned different widths to optimize local current distribution. The first power path portion has a greater width to handle higher current density, while other portions have adjusted widths based on their specific current requirements. This local quality variation reduces overall heat generation while maintaining compact dimensions.
2Area of stationary object
If the power line width is reduced to minimize the non-display area, then the display area is enlarged, but the electrical resistance in the power line increases
Solution Approach 1:
The power line is segmented into multiple parallel power path portions with different widths. This segmentation creates multiple current pathways that collectively provide sufficient electrical conductivity, preventing excessive resistance even when the overall non-display area is minimized.
Solution Approach 2:
The power path portions are designed with asymmetric width distribution rather than uniform widths. The first power path portion has a greater width to handle higher current density, while other portions have adjusted widths. This asymmetric design optimizes current distribution and reduces electrical resistance without requiring uniform increases in all power line dimensions.
3Area of stationary object
If the power line width is reduced to minimize the non-display area, then the display area is enlarged, but electric current concentrates in a bottle-neck portion causing heat generation
Solution Approach 1:
The power line is divided into multiple power path portions that distribute current flow. By providing parallel current pathways with different widths, the segmentation prevents current from concentrating in a single bottleneck portion, thereby reducing heat generation caused by current concentration.
Solution Approach 2:
Different power path portions have different widths optimized for their local current requirements. The first power path portion has a greater width to handle higher current density, while other portions have adjusted widths. This local quality variation ensures current is distributed according to each portion's capacity, preventing harmful current concentration and heat generation.
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 in the power line, minimizing the risk of pixel degradation and enhancing the overall performance and reliability of the display device.
Implementation Method 1
since electrical resistance in the power line increases and an electric current is concentrated in a bottle-neck portion of the power line, heat may be generated in the power line
Implementation Method 2
heat may be generated in the power line. As a result, there arises a likelihood that pixels adjacent to the power line may be degraded by the heat of the power line
Data Source
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AI summary
A display device (10) includes a display area (DA) having a pixel (PX), a non-display area (NDA), and a non-display sub-region including a first area (A1) and a bending area (BA), along a first direction, and a first power line (VSL) which is in the non-display area (NDA) and the first area (A1) and transmits a power voltage to the pixel (PX), the first power line (VSL) including a first and a second power connection portion (VSC2) spaced apart from each other in the first direction, and a first power path portion (VPC1) and a second power path portion (VPC2) which are spaced apart from each other along a second direction and connect the first and second power connection portions (VSC2) to each other. The length of the non-display sub-region is smaller than the length of the non-display area (NDA), and the first power path portion (VPC1) is closer to the outer edge of the non-display (NDA) sub-region than the second power path portion (VPC2).