Foldable AMOLED Display Panel Independent Scan Driving Circuits
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Solution Overview
Problem
Foldable AMOLED display panels face issues with brightness uniformity and power consumption due to differential light-emission times between primary and secondary screens, leading to bright-and-dark screen problems and increased power usage when only one screen is active.
Innovation Solution
A driving method and display panel design that utilize separate light-emission control scan driving circuits and start signals for each display region, allowing independent control of pixel units in primary and secondary screens, reducing power consumption by disabling data signals to inactive regions and adjusting pulse widths to maintain brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If separate light-emission control scan driving circuits are used for each display region, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The display panel is divided into multiple independent display regions (first display region and second display region), each with its own light-emission control scan driving circuit. This segmentation allows independent control of light emission in each region, enabling the primary screen and secondary screen to be controlled separately, thereby improving brightness uniformity while managing complexity through modular design
Solution Approach 2:
The system dynamically adjusts the operation mode of different display regions based on real-time requirements. The first and second light-emission control scan driving circuits can operate independently or in coordination, allowing the display to adapt between full-screen display, partial display, and different brightness levels, thus improving brightness uniformity under various operating conditions
2Use of energy by moving object
If independent control of each display region is implemented, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The display system is segmented into independently controllable regions with separate scan driving circuits. This allows the system to activate only the necessary display regions (primary or secondary screen) based on operational needs, significantly reducing power consumption by keeping inactive regions in standby mode rather than maintaining full-power operation across the entire display
Solution Approach 2:
The display system employs periodic scanning with sub-frames for different display regions. By using first and second start signals to control light emission in alternating or selective sub-frames, the system reduces average power consumption while maintaining the capability for full-screen display when needed, balancing power savings with functional requirements
3Reliability
If data signals are provided continuously to all display regions, then display completeness is maintained, but power consumption increases
Solution Approach 1:
The system extracts and provides data signals only to the active display region that requires updating. By using the first start signal and second start signal to selectively enable data signal transmission to the first or second display region, the system maintains display completeness for the active region while eliminating unnecessary power consumption from continuously driving all regions
Solution Approach 2:
Data signals are transmitted periodically in a selective manner corresponding to the sub-frame structure. The system alternates between providing data signals to the first display region and the second display region based on which region is currently active, maintaining reliable display updates for the active region while reducing overall power consumption through this periodic, selective signal transmission approach
Data Source
AI summary
A display panel, a display device, and a driving method are disclosed, the display panel includes display regions, the display regions include a first display region and a second display region, the display panel further includes a first light-emission control scan driving circuit and a second light-emission control scan driving circuit, and the driving method includes: in the first sub-frame, providing a first start signal to the first light-emission control scan driving circuit to display, and providing a second start signal to the second light-emission control scan driving circuit not to display, in the second sub-frame, providing the first start signal to the first light-emission control scan driving circuit again to display, and providing the second start signal to the second light-emission control scan driving circuit not to display; the second start signal and the first start signal are applied independently, respectively.