Display Device Input-Voltage Monitoring for Heat Prevention
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Solution Overview
Problem
Existing display devices experience excessive heat generation due to voltage drops in the input voltage, which affects the operation of components like the scan driver, data driver, and power voltage generators, leading to inefficiencies.
Innovation Solution
A display device with a timing controller that monitors input voltage levels and controls the operation of driving voltage and power voltage generators, turning them off when the input voltage drops below certain thresholds to prevent heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the input voltage is dropped to reduce voltage stress on components, then the voltage stress is reduced, but the input current increases causing excessive heat generation
Solution Approach 1:
The patent implements voltage monitoring that detects input voltage levels and provides feedback to control circuits. When voltage drop is detected, the system automatically adjusts operation modes or shuts down components to prevent excessive current and heat generation, while maintaining normal operation during adequate voltage conditions.
Solution Approach 2:
The patent employs dynamic control of component operation based on real-time voltage conditions. The system transitions between different operational states (normal operation, power saving mode, shutdown) according to the input voltage level, allowing flexible adaptation to voltage variations without fixed operational constraints.
2Reliability
If the input voltage is dropped to protect components from over-voltage, then component protection is improved, but the display panel cannot operate efficiently
Solution Approach 1:
The system dynamically adjusts its operational state based on input voltage conditions. During adequate voltage supply, the display operates at full efficiency. When voltage drop is detected, the system transitions to protected operational modes or shuts down non-critical components, maintaining reliability without permanently sacrificing operational efficiency.
Solution Approach 2:
The patent implements preliminary voltage monitoring and protective control mechanisms that prevent excessive voltage stress before it can damage components. By detecting voltage levels and preemptively adjusting operation or shutting down protective circuits, the system prevents over-voltage damage while maintaining normal operation during adequate voltage conditions.
3Temperature
If voltage monitoring and control circuits are added to prevent heat generation, then heat management is improved, but the device complexity increases
Solution Approach 1:
The patent integrates voltage monitoring and control functions into existing circuit architecture where possible, and uses multi-functional control units that handle both normal operation control and protective functions. This reduces the need for separate dedicated monitoring circuits, thereby limiting the increase in overall device complexity while maintaining effective heat management.
Data Source
AI summary
A display device includes: a display panel; a driving voltage generator; a power voltage generator; an input voltage generator; and a timing controller. The display panel is provided with a pixel configured to emit light by using a driving voltage. The driving voltage generator is configured to supply the driving voltage to the pixel. The power voltage generator is configured to generate power voltages for driving of the display panel by using an input voltage, and generating an input voltage sensing value by sensing the input voltage. The input voltage generator is configured to supply the input voltage to the power voltage generator. The timing controller is configured to control an operation of at least one of the driving voltage generator, the power voltage generator, and the input voltage generator according to the input voltage sensing value.