Display Panel Heating Electrode with Non-Uniform Resistance
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Solution Overview
Problem
Existing display devices face issues with uneven internal temperature distribution when starting at low temperatures, leading to poor display performance due to rapid heat transfer at irregular edges, causing temperature differences across the display region.
Innovation Solution
A display panel design featuring a regular and irregular display region with a heating electrode layer comprising first and second heating wires, where the target heating wire has non-uniform resistance per unit length, with a smaller resistance near the regular display region and larger resistance further away, to ensure uniform heating across the irregular region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform heating electrode layer is used across the display region, then the structure is simple and easy to manufacture, but the heating uniformity deteriorates due to rapid heat transfer at irregular edges
Solution Approach 1:
The heating electrode layer is designed with non-uniform resistance per unit length, where the resistance is lower near the regular display region and higher near the irregular display region. This local variation in resistance compensates for the different heat transfer characteristics at various locations, ensuring uniform heating across the entire display region while maintaining a relatively simple overall structure.
2Manufacturing precision
If the heating electrode layer has uniform resistance per unit length, then the manufacturing precision is easy to control, but the temperature distribution becomes uneven due to heat dissipation differences at irregular edges
Solution Approach 1:
The heating electrode layer incorporates local variations in resistance per unit length, with lower resistance near the regular display region and higher resistance near the irregular display region. This design compensates for the heat dissipation differences caused by the irregular edges, achieving uniform temperature distribution while keeping manufacturing precision manageable through controlled resistance variation.
3Speed
If the display device responds quickly at low temperature, then the response speed is improved, but the internal temperature becomes uneven due to rapid heat transfer
Solution Approach 1:
The heating electrode layer is designed with pre-optimized non-uniform resistance distribution before the display device operates at low temperature. This preliminary design ensures that when the device responds quickly to low temperature conditions, the heat is distributed uniformly across the display region, preventing temperature unevenness while maintaining fast response speed.
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 design improves heating uniformity in the irregular display region by optimizing heat dissipation, reducing temperature differences and enhancing display performance at low temperatures.
Implementation Method 1
The first electrode wire and the second electrode wire are applied with different voltages. At least one of the plurality of first heating wires serves as a target heating wire
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a regular display region and an irregular display region. The display panel also includes a first substrate and a second substrate that are disposed opposite to each other, a liquid crystal layer disposed between the first and second substrates, and a heating electrode layer stacked with the liquid crystal layer. In the irregular display region, the heating electrode layer includes a plurality of first heating wires, and each first heating wire is connected between a first electrode wire and a second electrode wire. At least one first heating wire serves as a target heating wire including a first sub-segment and a second sub-segment. The first sub-segment has a resistance per unit length smaller than the second sub-segment, and the first sub-segment is closer to the regular display region than the second sub-segment.