Organic Light Emitting Display Standby Mode Driving Method
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Solution Overview
Problem
Conventional organic light emitting displays consume high power and experience image sticking due to displaying full color during standby mode, leading to reduced lifespan.
Innovation Solution
A method of driving organic light emitting displays by restricting pixels to 8 colors or adjusting the duty ratio of emission control signals to reduce luminance, switching to a standby mode when no operation signal is received within a reference time, and turning off pixels when no signal is received within a second reference time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If full color display is maintained during standby mode, then image quality is preserved, but power consumption increases and image sticking occurs
Solution Approach 1:
The patent applies parameter changes by transitioning the display from full-color mode to 8-color grayscale mode during standby state. This changes the color depth parameter from 24-bit (full color) to a reduced color palette, significantly lowering power consumption while preventing image sticking through reduced pixel stress.
2Reliability
If full color display is maintained during standby mode, then color accuracy is preserved, but pixel degradation accelerates
Solution Approach 1:
The patent implements periodic action by alternating between full-color display mode during active use and 8-color grayscale mode during standby state. This periodic switching reduces cumulative pixel stress and degradation over time, extending display lifespan while maintaining acceptable visual quality during low-activity periods.
3Use of energy by moving object
If voltage is adjusted to reduce luminance during standby, then power consumption decreases, but color display capability is lost
Solution Approach 1:
The patent applies dynamics by implementing a dynamic display mode switching mechanism that adapts between full-color and 8-color modes based on system state (active vs. standby). This dynamic adaptation allows the display to optimize power consumption during standby while rapidly transitioning back to full-color capability when needed, maintaining versatility.
Data Source
AI summary
A method of driving an organic light emitting display is provided in which, during a standby mode, a display operation is performed using only eight colors. In the alternative, the luminance of a plurality of pixels is reduced by adjusting a duty ratio of the emission control signals. By reducing the luminance, power consumption and image sticking are reduced, and the life span of the pixels is increased.