Voltage Compensation for AMOLED Displays Using Thermosensitive Sensors
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Solution Overview
Problem
AMOLED display panels face issues with uneven brightness and residual images due to threshold voltage drifts under long-term pressure and high temperature, which existing compensation technologies struggle to address efficiently and cost-effectively.
Innovation Solution
A voltage compensation device comprising thermosensitive sensors, a processor, and a power source management module, where thermosensitive sensors detect temperature to determine actual pixel voltages and calculate compensated data signals, enabling the power source management module to output corrected voltages to achieve reference pixel voltages, thereby improving image display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing compensation technologies are used to address threshold voltage drifts, then some level of compensation is achieved, but the compensation is not efficient and cost-effective
Solution Approach 1:
The patent applies preliminary action by pre-storing multiple compensation values in the compensation module, each corresponding to different temperature ranges. When temperature changes occur, the processor selects and applies the appropriate pre-calculated compensation value, avoiding real-time complex calculations and achieving efficient compensation for threshold voltage drifts caused by temperature variations and aging.
2Reliability
If existing compensation technologies are used to address threshold voltage drifts, then some level of compensation is achieved, but the cost is high
Solution Approach 1:
The patent applies parameter changes by using temperature as a key parameter to determine compensation values. Instead of complex real-time voltage measurement and calculation, the system measures temperature (a simpler, cheaper parameter) and selects compensation values based on temperature ranges. This approach significantly reduces manufacturing costs while maintaining effective compensation for threshold voltage drifts.
3Illumination intensity
If temperature is quickly detected and compensated, then image display quality is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the temperature range into multiple segments or ranges, with each range having its corresponding compensation value stored in the compensation module. The processor determines which temperature range is currently active and applies the corresponding compensation value. This segmented approach simplifies the device structure compared to continuous real-time calculation, while still achieving effective compensation for display brightness uniformity across different temperature conditions.
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 efficiently and cost-effectively improves image display quality by quickly detecting temperature information and applying compensated voltages, reducing residual images and brightness differences across the display panel.
Implementation Method 1
a plurality of thermosensitive sensors, each of which corresponds to one or more pixel units of a display device and is disposed at a position corresponding to the one or more pixel units
Data Source
AI summary
The present disclosure provides a voltage compensation device, a method for voltage compensation and a display device. The voltage compensation device comprises a plurality of thermosensitive sensors, a processor and a power source management module. Each thermosensitive sensor corresponds to one or more pixel units of a display device and is disposed at a position corresponding to the one or more pixel units. For each thermosensitive sensor and one or more pixel units that corresponds to the thermosensitive sensor, the processor is configured to: determine an actual pixel voltage of the one or more pixel units; determine a compensated data signal; transmit the compensated data signal to the power source management module; and control the power source management module to output a compensated data voltage to the one or more pixel units, enabling the one or more pixel units to reach or approach the reference pixel voltage.