OLED Cathode Voltage Adjustment for Power Reduction
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Solution Overview
Problem
Conventional AMOLED display technologies exhibit high power consumption, necessitating a method to reduce energy usage without compromising display quality.
Innovation Solution
A voltage adjustment method that determines a target luminance value for display pixels or areas and adjusts the cathode voltage of OLED devices based on calculated voltage increment values, ensuring the luminance change remains within a preset range, thereby reducing power consumption while maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional AMOLED display technology is used, then display quality is maintained, but power consumption is high
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the cathode voltage of OLED devices based on target luminance values. The power supply management unit modifies voltage parameters (cathode voltage, source voltage) according to display requirements, enabling reduced power consumption while maintaining display quality through precise voltage control rather than fixed voltage operation
Solution Approach 2:
The patent implements dynamics by making the voltage supply adaptive and variable. Instead of using fixed voltage, the system dynamically adjusts cathode and source voltages based on target luminance values and display pixel characteristics. This dynamic voltage adjustment allows the system to optimize power consumption in real-time while maintaining display quality
2Use of energy by moving object
If cathode voltage is increased to reduce power consumption, then power consumption decreases, but luminance value changes significantly
Solution Approach 1:
The patent resolves this contradiction by changing multiple voltage parameters simultaneously (cathode voltage and source voltage) rather than adjusting only one. The power supply management unit calculates appropriate voltage increments based on target luminance values, ensuring that both voltages are adjusted in coordination to maintain luminance stability while reducing power consumption
Solution Approach 2:
The patent implements feedback by using target luminance values to guide voltage adjustments. The system calculates voltage increment values based on the difference between current and target luminance, then adjusts voltages accordingly. This feedback mechanism ensures that luminance changes remain within acceptable ranges while achieving power consumption reduction
Data Source
AI summary
The technology of this application relates to a voltage adjustment method and an electronic device. The method includes obtaining a target luminance value of current display of a display pixel, determining a voltage increment value based on the target luminance value, and adjusting, based on the voltage increment value, an initial cathode voltage of an OLED device corresponding to the display pixel, where after voltage adjustment, a change amount between a luminance value of the display pixel and the target luminance value falls within a preset range. This application may be applied to an electronic device, and display quality of a display screen can be improved while reducing power consumption of the display screen.