OLED Driving Current Stabilizing Circuit for Temperature Compensation
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Solution Overview
Problem
The existing organic light emitting diode (OLED) displays face challenges in maintaining consistent display quality due to changes in temperature, which affect the driving current and lead to degradation of OLED devices, resulting in varying brightness and image quality.
Innovation Solution
The implementation of a driving current stabilizing circuit that compares the driving voltage with pre-set reference voltages for R, G, and B OLED devices, adjusting the current flow to minimize temperature-induced changes and compensate for device degradation, using a temperature sensing circuit to adjust reference voltages accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a voltage is applied to drive the OLED devices, then light emission and display function are achieved, but temperature increases causing driving current changes and display quality degradation
Solution Approach 1:
The patent implements a temperature sensing circuit that continuously monitors the panel temperature and feeds this information back to a driving current stabilizing circuit. This feedback mechanism allows the system to automatically adjust driving currents for R, G, and B OLED devices based on real-time temperature conditions, compensating for temperature-induced current variations and maintaining stable display quality throughout operation.
2Illumination intensity
If driving current is increased to improve brightness, then illumination intensity increases, but OLED device degradation accelerates
Solution Approach 1:
The patent employs dynamic current adjustment through the driving current stabilizing circuit, which continuously adapts the driving currents for R, G, and B OLED devices based on real-time temperature conditions and device degradation states. This dynamic approach allows the system to optimize brightness output while preventing excessive current that would accelerate degradation, thereby extending OLED device lifespan.
3Duration of action of stationary object
If temperature changes occur during operation, then display function is maintained, but driving current varies causing brightness inconsistency
Solution Approach 1:
The temperature sensing circuit continuously monitors panel temperature during operation and feeds this information to the driving current stabilizing circuit, which adjusts the driving currents for R, G, and B OLED devices in real-time. This feedback mechanism compensates for temperature-induced current variations, maintaining consistent brightness throughout continuous operation despite temperature changes.
4Illumination intensity
If separate control circuits are added for each color to stabilize current, then brightness consistency improves, but device complexity increases
Solution Approach 1:
The patent combines separate control functions into an integrated driving current stabilizing circuit that manages R, G, and B OLED devices through unified temperature compensation logic. By merging the temperature sensing and current control functions into a coordinated system with shared compensation mechanisms, the patent achieves brightness consistency across all color channels while minimizing overall circuit complexity compared to fully independent control circuits.
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 solution stabilizes the driving current across R, G, and B OLED devices, maintaining consistent brightness and improving display quality by adapting to temperature changes and device degradation, ensuring a stable image output.
Implementation Method 1
electrons and holes are collided with each other to be re-combined to generate a light in the organic light emitting layer
Data Source
AI summary
Disclosed is an organic light emitting diode display and method for minimizing a change of a driving current of R, G, and B organic light emitting diode devices to improve a display quality when a temperature within a panel is changed and an organic light emitting diode device is degraded.