Display Panel Temperature Compensation Using Segmented Heaters
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Solution Overview
Problem
Existing display panels face issues with non-uniform temperatures due to heating systems, leading to suboptimal performance and display defects like Mura at low temperatures, especially in wide-temperature applications.
Innovation Solution
Incorporating temperature sensors and heaters in a display panel, where temperature sensors are integrated into the substrate and connected to a processor and controller to ensure uniform heating when temperatures drop below a preset level, using parallel heating strips made of transparent conductive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heating system is added to ensure normal operation at low temperatures, then the display can operate in cold environments, but the heating system causes non-uniform temperatures in different positions of the display
Solution Approach 1:
The patent divides the heating system into multiple independent heating units (first heating unit and second heating unit) positioned at different locations within the display panel. Each heating unit can be independently controlled based on temperature sensor feedback from its region, enabling localized temperature management and eliminating the non-uniform heating problem caused by single centralized heating systems.
Solution Approach 2:
The patent implements different heating strategies for different regions of the display panel by positioning heating units and temperature sensors at specific locations. The controller adjusts heating power locally based on real-time temperature measurements from each region, ensuring uniform temperature distribution across the entire display while maintaining normal operation in cold environments.
2Adaptability or versatility
If wide-temperature liquid crystal materials are used to improve low-temperature display properties, then the display can operate at lower temperatures, but the liquid crystal viscosity coefficient increases sharply under ultra-low temperature conditions
Solution Approach 1:
The patent activates heating units before the display is fully powered on or before low-temperature operation begins. The temperature sensors detect cold conditions and trigger the heating units to pre-warm the liquid crystal layer, reducing viscosity before the display starts operating. This preliminary heating action ensures fast response speed from the start of operation while maintaining adaptability to low-temperature environments.
Solution Approach 2:
The patent maintains continuous heating operation through multiple heating units that work in conjunction to sustain optimal temperature throughout low-temperature operation. The system continuously monitors temperature via sensors and adjusts heating power to maintain liquid crystal viscosity within acceptable ranges, ensuring consistently fast response speed throughout the entire low-temperature operating period.
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
Maintains uniform temperatures across the display panel, ensuring normal operation and preventing display defects at low temperatures, thereby expanding the operational range of the display.
Implementation Method 1
a plurality of heaters respectively arranged on one side of the first substrate and the second substrate away from the liquid crystal layer
Implementation Method 2
each temperature sensor includes a source, a drain and a gate, and the drain and the gate of each temperature sensor are electrically connected
Data Source
AI summary
The present disclosure relates to a display panel, a temperature compensation method thereof and a display device. The display panel includes: a first substrate; a second substrate; a liquid crystal layer; a plurality of temperature sensors; a plurality of heaters; an electrical signal supply circuit; a processor; and a controller. The display device includes a driving circuit and the display panel. The driving circuit includes a source driving circuit, a gate driving circuit, and a timing controller.