OLED Display Driving Circuit for Static Region Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED displays consume unnecessary power and experience image sticking issues due to continuous operation in inactive states, such as displaying static information like time and date, which reduces their lifespan and efficiency.
Innovation Solution
The OLED display system includes a driving circuit that analyzes image information to determine inactive states and selectively turns off non-light emitting regions, adjusts image positions, changes colors, simulates movement, or reduces luminance, thereby reducing power consumption and preventing image sticking by only activating necessary components for displaying information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the OLED display operates continuously to display static information, then the display function is maintained, but power consumption increases unnecessarily and image sticking occurs
Solution Approach 1:
The display panel is divided into multiple gamma block regions (first gamma block region, second gamma block region, etc.), each controlled by independent gamma block drivers. This segmentation allows selective activation of only the regions displaying static information, preventing image sticking and reducing power consumption in non-active regions.
Solution Approach 2:
The system dynamically adjusts the operation state of gamma block drivers based on detected static regions. When a gamma block region is detected to display static information, the corresponding driver is turned off or operated in a low-power mode, while drivers for regions displaying changing information remain active. This dynamic adaptation resolves the contradiction between maintaining display function and reducing power consumption.
2Reliability
If the OLED display operates continuously to maintain display function, then image information is always fresh, but image sticking occurs in static regions
Solution Approach 1:
The display is segmented into multiple gamma block regions with independent control. By detecting which regions contain static information, the system can selectively turn off or reduce operation in those specific regions, preventing image sticking locally without affecting the overall display quality in active regions.
Solution Approach 2:
Different operational modes are applied to different gamma block regions based on their content characteristics. Regions with static information receive reduced operation or are turned off, while regions with dynamic content maintain full operation. This local differentiation prevents image sticking in static regions while preserving display quality in active regions.
3Area of stationary object
If all gamma block drivers operate continuously, then the entire display area is available, but power consumption increases and lifespan decreases
Solution Approach 1:
The display area is divided into multiple independently controllable gamma block regions. This segmentation enables selective activation of only the necessary display areas, reducing power consumption while maintaining the available display area for active content. The system can dynamically adjust which regions are active based on content requirements.
Solution Approach 2:
Instead of operating all gamma block drivers at full capacity continuously, the system applies partial action by activating only the drivers corresponding to regions that need to display information. This reduces overall power consumption while maintaining the necessary display area for current content requirements.
4Loss of information
If the driving circuit operates all components continuously, then complete image information is displayed, but unnecessary power is consumed in inactive states
Solution Approach 1:
The driving circuit dynamically adjusts the operation of gamma block drivers based on real-time analysis of image information. When static regions are detected, the corresponding drivers are turned off or operated in low-power mode. This dynamic control maintains complete image information display in active regions while eliminating unnecessary power consumption in regions displaying static content.
Solution Approach 2:
The system implements feedback by continuously analyzing image information to detect static regions and adjusting the operation state of gamma block drivers accordingly. This feedback mechanism ensures that power consumption is optimized while maintaining complete and accurate display of image information in active regions.
Data Source
AI summary
Exemplary embodiments of the present invention relate to an organic light emitting diode (OLED) display and a method of driving the same. The OLED display includes a driving circuit for generating a plurality of data signals and a plurality of scan signals based on image information stored in a memory. The driving circuit receives an inactive state signal generated when the image information is a still image, generates only a plurality of scan signals and a plurality of data signals corresponding to a light emitting region in which the still image is displayed, and transfers the generated scan and data signals to a plurality of corresponding data lines and a plurality of corresponding scan lines, respectively.