OLED Sub-pixel Alternation for Standby Power Reduction
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Solution Overview
Problem
Current display technologies, particularly organic light emitting displays (OLEDs), face challenges in efficiently managing power consumption and image resolution in standby modes, leading to suboptimal performance and potential damage from prolonged usage.
Innovation Solution
A display apparatus and method that utilize a controller to alternate the emission of light from color sub-pixels, applying different voltage differences in normal and standby modes, and processing image data to ensure high-luminance emission from specific sub-pixels while maintaining white color coordinates, thereby reducing power consumption and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all color sub-pixels continuously emit light in standby mode, then image quality is maintained, but power consumption increases and display lifespan decreases
Solution Approach 1:
The patent implements periodic action by alternating the emission of light from different color sub-pixels in standby mode. Specifically, it controls first and second portions of color sub-pixels to emit light alternately at different time periods, rather than having all sub-pixels emit continuously. This periodic switching reduces cumulative operating hours for each sub-pixel, extending display lifespan while maintaining perceived image quality through persistence of vision.
2Use of energy by moving object
If voltage difference is reduced in standby mode, then power consumption decreases, but emission intensity may be insufficient
Solution Approach 1:
The patent applies local quality by differentiating the operation of different color sub-pixels based on their emission characteristics. In standby mode, it selectively controls first and second portions of color sub-pixels with different voltage differences applied at different time periods. This allows optimization of power consumption for each sub-pixel group while ensuring sufficient emission intensity when needed, as each portion is driven with appropriate voltage during its active emission period.
3Use of energy by moving object
If alternating emission is implemented, then power consumption and display lifespan are optimized, but image uniformity may be affected
Solution Approach 1:
The patent implements periodic action by alternating the emission of light from different color sub-pixels in standby mode. Specifically, it controls first and second portions of color sub-pixels to emit light alternately at different time periods, rather than having all sub-pixels emit continuously. This periodic switching reduces cumulative operating hours for each sub-pixel, extending display lifespan while maintaining perceived image quality through persistence of vision.
Solution Approach 2:
The patent applies dynamics by dynamically switching between different emission patterns. In normal mode, all color sub-pixels emit simultaneously with appropriate voltage differences. In standby mode, it dynamically alternates between first and second portions of sub-pixels at different time periods. This dynamic adaptation allows the system to optimize power consumption and lifespan while maintaining image uniformity through controlled temporal distribution of emission.
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 effectively reduces power consumption in standby modes while maintaining image quality and extending the lifespan of the display by ensuring high-luminance emission from specific sub-pixels and alternating their usage, thus addressing the inefficiencies and potential damage in existing OLED technologies.
Implementation Method 1
each of the color sub-pixels including an organic light emitting diode and a driving transistor to drive the organic light emitting diode
Data Source
AI summary
A display apparatus includes a display and a controller. The display includes a plurality color sub-pixels, each including an organic light emitting diode and a driving transistor to drive the organic light emitting diode. The driving transistor drives in a saturation region for a normal mode and in a linear region for a standby mode. The controller controls a first portion of preset-color sub-pixels among the color sub-pixels to emit light and a second portion of the preset-color sub-pixels among the color sub-pixels to not emit light in the standby mode.