Display Panel Heating Line Layout for Uniform Low-Temperature Heating
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Solution Overview
Problem
Vehicle-mounted liquid crystal display screens face issues with image quality and display failure due to increased viscosity of liquid crystal molecules at low temperatures, leading to uneven heating and reduced heating effectiveness in strip-shaped displays.
Innovation Solution
A display panel design with varying heating line densities and resistances in different sub-regions, where the first heating lines have a greater arrangement density and lower resistance than the second heating lines, ensuring uniform heating by optimizing the length and resistance of heating lines connected to power supply pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heating lines are provided in the display panel using existing design, then heating function is achieved, but uneven heating occurs especially in strip-shaped displays
Solution Approach 1:
The patent applies local quality by differentiating heating line parameters across different sub-regions of the display panel. Specifically, the display region is divided into first and second sub-regions with different heating line arrangement densities and/or resistances. This allows each sub-region to have optimized heating characteristics tailored to its specific thermal requirements, thereby achieving uniform heating across the entire panel while avoiding the uneven heating problems of conventional uniform designs.
Solution Approach 2:
The patent implements parameter changes by varying key heating line parameters including arrangement density, resistance, and bus line lengths across different sub-regions. By adjusting these parameters, the patent optimizes heating power distribution to compensate for thermal losses and achieve uniform temperature distribution, directly resolving the technical contradiction between achieving heating function and maintaining heating consistency.
2Reliability
If heating lines are added to address low temperature display failure, then display reliability at low temperature is improved, but device complexity increases
Solution Approach 1:
The patent merges the heating function with the existing display panel structure by integrating heating lines into the panel's internal architecture. The heating lines are combined with the display region sub-regions and power supply system, creating a unified structure that provides both display and heating functions without requiring separate external heating components, thus improving reliability while minimizing added complexity.
Solution Approach 2:
The heating lines serve multiple functions: they provide thermal heating to prevent low-temperature display failure, and their strategic placement in different sub-regions also serves as a means to achieve uniform temperature distribution. This multi-functionality improves display reliability at low temperatures while avoiding the need for additional dedicated components that would increase device complexity.
3Temperature
If uniform heating is achieved through increased heating power, then heating uniformity improves, but energy consumption increases
Solution Approach 1:
The patent applies local quality by providing different heating line arrangement densities and resistances in different sub-regions rather than using a uniform high-power design throughout. This allows each sub-region to receive precisely the heating power it needs, achieving uniform heating across the entire panel while minimizing total energy consumption by avoiding unnecessary heating in areas that require less thermal input.
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 enhances heating power per unit area, reducing voltage decay and improving in-plane heating uniformity, particularly in strip-shaped displays, thus preventing display failures at low temperatures.
Implementation Method 1
heating lines include at least one first heating line and at least one second heating line... a length of one of the at least one heating bus connected between one of the at least one first heating line and one of the at least one power supply pin is greater than a length of the one of the at least one heating bus connected between one of the at least one second heating line and the one of the at least one power supply pin
Data Source
AI summary
A display panel includes heating lines each including part located in a display region, and a heating bus and a power supply pin located in a non-display region. The heating bus is electrically connected to the power supply pin and the heating lines. The display region includes first and second sub-regions, the heating lines include first and second heating lines. One first heating line is located in the first sub-region. One second heating line is located in the second sub-region. A length of the heating bus connected between one first heating line and the power supply pin is greater than a length of heating bus connected between one second heating line and the power supply pin. An arrangement density of first heating line is greater than that of the second heating line, or a resistance of the first heating line is smaller than that of the second heating line.