AMOLED Display Driver Power Saving Mode
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Active-matrix organic light-emitting diode (AMOLED) displays face challenges in reducing power consumption, especially when displaying still or slow-moving images, as existing power-saving modes do not adequately minimize energy usage without compromising luminance.
Innovation Solution
The display system employs a power-saving mode that reduces the scanning rates of gate and emission scanning signals, and adjusts the width of pulse signals in the light emitting enable signal to maintain consistent luminance across frames, allowing for reduced power consumption without significant changes in image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the scanning rate of gate and emission scanning signals is reduced to save power, then power consumption decreases, but luminance consistency deteriorates
Solution Approach 1:
The patent implements periodic action by using different scanning rates for different frames. Normal frames are scanned at a first scanning rate while power-saving frames are scanned at a second, lower scanning rate. This periodic alternation between normal and power-saving modes allows the display to reduce overall power consumption while maintaining acceptable luminance consistency through selective application of the power-saving mode.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the scanning rate parameter based on frame type. The light emitting driver changes the scanning rate from a first rate during normal operation to a second rate during power-saving mode. Additionally, the pulse signal width parameter is adjusted to compensate for the reduced scanning rate, ensuring that luminance consistency is maintained despite the lower scanning frequency.
2Illumination intensity
If the pulse signal width is adjusted to maintain luminance at lower scanning rates, then luminance consistency is maintained, but signal complexity increases
Solution Approach 1:
The patent manages signal complexity through systematic parameter changes. When operating in power-saving mode with a reduced scanning rate, the light emitting driver automatically adjusts the pulse signal width parameter to maintain appropriate luminance levels. This coordinated adjustment of multiple parameters (scanning rate and pulse width) follows a defined pattern that, while adding control complexity, ensures consistent luminance output across different operating modes.
Data Source
AI summary
An apparatus for display an active region having a plurality of light-emitting elements, a gate scanning driver operatively coupled to the active region and configured to stop a gate scanning signal to the plurality of light-emitting elements in a period, and a light emitting driver operatively coupled to the active region and configured to cause the plurality of light-emitting elements to emit light in the period.