OLED Power Supply Voltage Sensing Segmentation
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Solution Overview
Problem
Existing power supplies for organic light emitting display devices suffer from non-uniform brightness due to variations in input voltage levels, leading to inconsistent luminance when powered by different voltage sources such as batteries and USB ports.
Innovation Solution
A power supply system that includes a voltage sensing unit, multiple power generating units, and a selecting unit to independently generate and regulate the first and second pixel powers, allowing operation regardless of input voltage levels by boosting, inverting, and selecting between input voltages from batteries and constant voltage sources like USB ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power supply uses a single power generating unit for both battery and USB input voltages, then the device complexity is reduced, but the brightness uniformity deteriorates due to voltage level differences
Solution Approach 1:
The power supply is divided into multiple independent power generating units: a first power generating unit for battery input and a second power generating unit for USB input. Each unit independently generates the first pixel power, allowing optimized voltage regulation for different input sources and maintaining brightness uniformity across varying input conditions.
Solution Approach 2:
The power supply changes the voltage generation parameters based on the input voltage level. When battery input is detected, the first power generating unit operates with parameters optimized for lower voltage; when USB input is detected, the second power generating unit operates with parameters optimized for higher voltage, ensuring consistent pixel power output and brightness uniformity.
2Use of energy by moving object
If the power supply generates pixel power directly from input voltage without regulation, then the power consumption is reduced, but the brightness uniformity deteriorates due to voltage fluctuations
Solution Approach 1:
The power supply incorporates voltage sensing that detects the input voltage level (battery or USB) and provides feedback to the appropriate power generating unit. This feedback mechanism enables the unit to adjust its voltage regulation to maintain consistent first pixel power output, ensuring brightness uniformity while managing power consumption efficiently.
Solution Approach 2:
The power generating units dynamically change their operating parameters based on the detected input voltage. The first power generating unit regulates voltage when battery input is detected, while the second power generating unit applies different regulation when USB input is detected, maintaining optimal power consumption and brightness uniformity across different input conditions.
3Illumination intensity
If the power supply uses different power generating units for different input voltages, then the brightness uniformity is improved, but the device complexity increases
Solution Approach 1:
Both the first and second power generating units share common components including the voltage sensing unit, switching unit, and second pixel power generating unit. This multi-functionality approach allows the system to maintain brightness uniformity across different input voltages while minimizing the increase in device complexity through shared resources.
Solution Approach 2:
The power supply dynamically selects which power generating unit to activate based on the detected input voltage type. The switching unit dynamically connects the appropriate power generating unit to the voltage sensing unit and pixel power generation circuitry, allowing flexible operation mode changes without requiring both units to be permanently active, thus managing complexity.
Data Source
AI summary
A power supply configured to receive at least one of a first input voltage and a second input voltage and to generate a voltage of a first pixel power and a voltage of a second pixel power, includes: a voltage sensing unit for generating voltage sensing signals corresponding to the first input voltage and the second input voltage; a first power generating unit for receiving the first input voltage and generating the voltage of the first pixel power corresponding to the voltage sensing signals; a second power generating unit for receiving the second input voltage and generating the voltage of the first pixel power corresponding to the voltage sensing signals; and a third power generating unit for receiving the first input voltage and the second input voltage, utilizing the first input voltage or the second input voltage, and generating the voltage of the second pixel power corresponding to the voltage sensing signals.