OLED Voltage Controller Dynamic Power Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional organic light emitting displays experience increased power consumption due to the margin voltage required for temperature characteristics, which occupies 20% to 30% of the total power consumption.
Innovation Solution
An organic light emitting display system that includes a voltage controller to dynamically adjust the second power source voltage based on the temperature-dependent voltage applied to the OLED, using a digital-to-analog converter and comparator to ensure the second power source voltage aligns with the first power source voltage, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large margin voltage is applied to ensure stable OLED operation across temperature variations, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic voltage adjustment by introducing a voltage controller that modifies the second power source voltage based on detected OLED voltage characteristics. Instead of using a fixed large margin voltage, the system dynamically adapts the voltage level to match actual OLED requirements, reducing unnecessary voltage headroom while maintaining stable operation across temperature variations.
Solution Approach 2:
The patent employs a feedback mechanism where the voltage controller monitors the voltage applied to the OLED and adjusts the second power source voltage accordingly. By detecting the actual voltage drop across the OLED and comparing it with reference values, the system automatically compensates for temperature-induced variations, ensuring reliable operation without requiring excessive margin voltage.
2Use of energy by moving object
If the second power source voltage is reduced to minimize power consumption, then energy efficiency is improved, but OLED operation stability deteriorates
Solution Approach 1:
The voltage controller continuously monitors OLED voltage characteristics and adjusts the second power source voltage in real-time based on feedback signals. This closed-loop control ensures that the OLED receives precisely the voltage it needs for stable operation, preventing both over-voltage (waste) and under-voltage (instability) conditions.
Solution Approach 2:
The patent changes the voltage parameter of the second power source dynamically rather than keeping it fixed. By adjusting the voltage level according to detected OLED characteristics and temperature conditions, the system optimizes the balance between power consumption and operational stability, ensuring the OLED operates reliably at the minimum necessary voltage.
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 approach reduces power consumption by optimizing the second power source voltage according to the temperature at which the OLED is driven, eliminating the need for an unnecessarily large margin voltage.
Implementation Method 1
The organic light emitting display display images using organic light emitting diodes (OLED) that generate light by the re-combination of electrons and holes
Data Source
AI summary
An organic light emitting display capable of minimizing power consumption. The organic light emitting display includes a plurality of pixels positioned at intersections of data lines and scan lines includes the pixels including driving transistors positioned in an effective display region to control an amount of current that flows from a first power source to a second power source, a data driver for supplying data signals to the data lines, a scan driver supplying scan signals to the scan lines, a first power source generator generating the first power source, a second power source generator generating the second power source, and a voltage controller controlling the second power source generator so that voltage of the second power source is changed in response to a first voltage applied to an organic light emitting diode (OLED) included in a specific pixel when a data signal corresponding to specific brightness is supplied from the data driver to the specific pixel.