OLED Display Power Management via Zone Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable information handling systems with OLED displays face challenges in thermal and power management due to OLED material degradation, leading to irregularities in display performance and image ghosting, especially in convertible configurations where display orientation and ambient conditions vary.
Innovation Solution
The system divides the OLED display into zones with adjustable pixel density, refresh rate, and brightness to manage power and thermal constraints, using a display zone manager to optimize pixel settings based on detected conditions, and employs a compensation table validated by camera images to ensure accurate visual image representation without ghosting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If OLED displays operate at full power to maintain image quality, then visual image presentation is improved, but power consumption and thermal energy release increase
Solution Approach 1:
The display is divided into multiple zones with different power management settings. The system can selectively adjust pixel density, refresh rate, and brightness in specific zones rather than uniformly across the entire display, allowing bright areas to maintain full illumination while dimmer areas reduce power consumption.
Solution Approach 2:
The display operates with dynamically adjustable parameters including variable pixel density, refresh rates, and brightness levels. The system continuously monitors usage conditions and adapts power consumption settings in real-time to match actual display requirements, reducing energy waste during static or low-visibility periods.
2Illumination intensity
If OLED displays operate at full power to maintain image quality, then visual image presentation is improved, but thermal energy release increases
Solution Approach 1:
The display is divided into multiple zones with different power management settings. The system can selectively adjust pixel density, refresh rate, and brightness in specific zones rather than uniformly across the entire display, allowing bright areas to maintain full illumination while dimmer areas reduce thermal output.
Solution Approach 2:
The display operates with dynamically adjustable parameters including variable pixel density, refresh rates, and brightness levels. The system continuously monitors usage conditions and adapts thermal management settings in real-time to match actual display requirements, reducing heat generation during static or low-visibility periods.
3Reliability
If OLED displays operate continuously at high current to compensate for material degradation, then image quality is maintained, but OLED material degradation accelerates
Solution Approach 1:
The system applies compensation values from a lookup table in advance to counteract known degradation patterns. By pre-calculating and applying compensation for expected degradation based on usage history and environmental conditions, the system maintains image quality without requiring excessive current that would accelerate further degradation.
Solution Approach 2:
The system continuously monitors actual display output and compares it against target image quality standards. Based on this feedback, the control algorithm dynamically adjusts compensation values and current distribution to maintain image quality while minimizing the additional stress on OLED materials.
4Stability of the object's composition
If uniform pixel density is maintained across the entire display, then visual image consistency is improved, but power consumption increases
Solution Approach 1:
Different zones of the display are assigned different power management characteristics based on their specific requirements. The system can apply higher pixel density and refresh rates to areas requiring precise image display while using lower settings in areas where image quality requirements are less stringent, optimizing the balance between uniformity and power consumption.
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, thermal energy release, and OLED material degradation while maintaining minimal impact on user experience, providing effective power and thermal management and reducing image ghosting effects.
Implementation Method 1
OLED displays generate visual images by creating illumination with direct current applied to red, green and blue OLED material of each pixel
Implementation Method 2
creating illumination with direct current applied to red, green and blue OLED material
Data Source
AI summary
A portable information handling system organic light emitting diode (OLED) display manages power consumption by dividing the display into plural zones of contiguous pixels and presenting visual images in a first zone at a full pixel density and in a second pixel density. For example, a full pixel density presents visual images with all pixels at a display setting and a partial pixel density presents visual images with at least some pixels at the display setting and at least some pixels at a reduced power setting, such as off or a reduced illumination.