OLED Power Voltage Controller for Dynamic Luminance Adjustment
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Solution Overview
Problem
Contemporary organic light emitting display devices experience increased power consumption due to fixed voltage levels that do not account for image input or device deterioration, leading to inefficiencies in power usage.
Innovation Solution
An organic light emitting display device with an image analyzer that generates a luminance histogram to determine the maximum luminance level and estimates power voltage variations, a power voltage controller that adjusts the power voltage based on this analysis, and a corrector that adjusts voltage levels based on current differences to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed voltage level is set to account for device deterioration, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic voltage adjustment by introducing a voltage adjustment unit that modifies the base power voltage according to the input image characteristics (maximum luminance level) and device deterioration state. Instead of using a fixed voltage level, the system dynamically selects from multiple voltage levels (first through fifth voltages) based on real-time conditions, thereby maintaining reliability while minimizing unnecessary power consumption.
Solution Approach 2:
The patent changes the voltage parameter from a fixed value to a variable that adapts to different operating conditions. The voltage adjustment unit selects different voltage levels (V1-V5) based on the maximum luminance level of the input image and the deterioration state, allowing the system to optimize power consumption while maintaining performance consistency across the device lifecycle.
2Illumination intensity
If a higher voltage level is supplied to compensate for deterioration, then luminance output is maintained, but power consumption increases
Solution Approach 1:
The patent applies different voltage levels to different operating conditions rather than uniformly increasing voltage for all cases. The voltage adjustment unit selectively applies higher voltage levels (V3-V5) only when necessary based on the specific input image characteristics and deterioration state, while using lower voltage levels (V1-V2) when sufficient, thereby maintaining luminance output only where needed and reducing overall power consumption.
Solution Approach 2:
The system dynamically adjusts the voltage level supplied to the organic light emitting diodes based on real-time monitoring of the input image's maximum luminance level and the device's deterioration state. This dynamic adjustment ensures that higher voltage (and thus higher power consumption) is applied only when necessary to maintain adequate luminance output, rather than continuously operating at elevated voltage levels.
3Use of energy by moving object
If voltage is adjusted based on input image characteristics, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the voltage adjustment unit continuously monitors the input image characteristics (specifically the maximum luminance level) and the device deterioration state, then adjusts the base power voltage accordingly. This feedback loop enables automatic optimization of power consumption without requiring complex manual intervention, as the system self-regulates based on real-time conditions.
Solution Approach 2:
The voltage adjustment unit serves as an intermediary component that bridges the input image signal and the power supply to the organic light emitting diodes. This intermediary analyzes the input image characteristics and deterioration state, then selectively applies appropriate voltage levels, thereby simplifying the overall control architecture while achieving power consumption reduction without requiring direct complex interaction between all system components.
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
The solution reduces power consumption by dynamically adjusting power voltage levels based on input images and device deterioration, minimizing unnecessary power usage before the device deteriorates.
Implementation Method 1
The organic light emitting display device displays images using organic light emitting diodes (OLED) that generate light by re-combination of electrons and holes
Data Source
AI summary
There is provided an organic light emitting display device capable of reducing power consumption by adjusting a voltage according to an input image and deterioration of the organic light emitting display device and a method of driving the same.