Display Panel Driver Circuit Overheat Protection
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Solution Overview
Problem
Conventional display panel drivers are prone to overheating, which can lead to damage and require effective overheat protection measures.
Innovation Solution
A display panel driver circuit with integrated overheat protection devices, comprising protection circuits, an interface circuit, and temperature detection circuits, that enables drivers to operate in a protection mode by receiving an enable signal when excessive temperatures are detected, typically above 160° C or 170° C, thereby preventing damage by switching to a low performance mode or reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drivers operate at high performance, then productivity is improved, but temperature increases causing overheat damage
Solution Approach 1:
The temperature detection circuit detects temperature in advance before it reaches dangerous levels. The protection circuit receives the detection result and preemptively switches the driver to protection mode, preventing overheat damage before it occurs. This allows the system to maintain high performance during normal operation while automatically activating protection measures when temperature thresholds are approached.
2Reliability
If protection mode is activated, then reliability is improved, but productivity decreases due to low performance operation
Solution Approach 1:
The driver operates dynamically between two states: normal mode for high performance and protection mode for reliability. The protection circuit dynamically switches between these modes based on real-time temperature detection feedback. This dynamic operation allows the system to maximize productivity during normal conditions while ensuring reliability when temperature becomes critical.
3Reliability
If temperature detection and protection circuits are added, then reliability is improved, but device complexity increases
Solution Approach 1:
The temperature detection circuit and protection circuit are integrated into the existing driver structure. The detection circuit monitors temperature and the protection circuit receives its output to control the driver's operation mode. By merging these protection functions into the driver system rather than adding completely separate systems, the patent achieves reliable overheat protection while minimizing the increase in overall device complexity.
Data Source
AI summary
A display panel driver circuit includes multiple drivers adapted for cooperatively driving a display panel and each operable under a protection mode, and an overheat protection device including multiple protection circuits, each of which controls a respective one of the drivers to operate under the protection mode in response to receipt of an enable signal, an interface circuit which transmits the enable signal to each of the protection circuits in response to receipt of a warning signal, and multiple temperature detection circuits, each of which is able to detect a temperature associated with a respective one of the drivers, and outputs the warning signal to the interface circuit based on the temperature thus detected.