OLED Power Supply Dynamic Voltage Control
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Solution Overview
Problem
Organic light emitting diode (OLED) displays experience varying operation voltage ranges due to temperature and usage time, leading to unnecessary power consumption as the driving power source is maintained within a predetermined range to ensure stable emission.
Innovation Solution
A power supply system that includes a power source voltage controller and a DC-DC converter to determine and control the panel current, generating a feedback voltage and adjusting the power source voltage to match a target value, thereby reducing power consumption by optimizing the power source voltage based on operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving power source is maintained within a predetermined voltage range to ensure stable emission, then the reliability of OLED emission is improved, but unnecessary power consumption increases
Solution Approach 1:
The patent implements dynamic voltage adjustment by continuously monitoring panel current and adjusting the power source voltage in real-time according to actual operating conditions, replacing the static predetermined voltage range with an adaptive voltage control mechanism that responds to temperature and usage time variations
Solution Approach 2:
The patent employs a feedback control mechanism where the controller monitors panel current flowing through the OLED panel and uses this information to adjust the power source voltage, creating a closed-loop system that optimizes voltage output based on actual consumption patterns and emission requirements
2Adaptability or versatility
If the operation voltage range is expanded to accommodate temperature and usage time variations, then the adaptability of OLED operation is improved, but the complexity of power supply control increases
Solution Approach 1:
The patent dynamically changes the voltage parameter based on panel current measurements, allowing the power supply to adapt to different operating conditions (temperature, usage time) by adjusting voltage levels rather than maintaining a fixed predetermined range
Solution Approach 2:
The power supply system performs self-adjustment by automatically monitoring its own output through panel current measurement and autonomously modifying the voltage output without requiring external intervention or complex control algorithms
Data Source
AI summary
The described technology relates generally to a power supply, a display device including the same, and a driving method thereof to reduce power consumption of the display device. Embodiments include a power source voltage controller sensing a panel current flowing in the display panel and controlling a feedback voltage according to the panel current and the power source voltage, and a DC-DC converter generating a power source voltage according to the feedback voltage to respectively supply it to the plurality of light emitting elements.