PDN Controller Optimizes OLED Power via Dynamic Sub-Panel Reconfiguration
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Solution Overview
Problem
As OLED display panels increase in size, power consumption becomes a significant issue, affecting both mobile devices and electronic devices like TVs, necessitating the development of low power OLED display systems.
Innovation Solution
A display device incorporating a power delivery network (PDN) controller that manages a reconfigurable PDN, comprising multiple sub-panels, DC-DC converters, and an image controller, which adjusts voltage supply and window size based on state information and integrated image data to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of DC-DC converters is increased to match the number of sub-panels, then power delivery capability is improved, but device complexity and production cost increase
Solution Approach 1:
Each DC-DC converter is designed to serve multiple sub-panels through the switch network, allowing a single converter to deliver power to different sub-panels at different times. This multi-functionality reduces the total number of converters needed while maintaining adequate power delivery capability across all sub-panels.
Solution Approach 2:
The system dynamically reconfigures the connection between DC-DC converters and sub-panels using the switch network based on real-time power requirements. The PDN controller adjusts which converters are connected to which sub-panels dynamically, allowing flexible power distribution with fewer converters than sub-panels.
2Power
If the number of DC-DC converters is increased to match the number of sub-panels, then power delivery capability is improved, but production cost increases
Solution Approach 1:
Each DC-DC converter is designed to serve multiple sub-panels through the switch network, allowing a single converter to deliver power to different sub-panels at different times. This multi-functionality reduces the total number of converters needed while maintaining adequate power delivery capability across all sub-panels.
Solution Approach 2:
The patent combines multiple sub-panels into power delivery groups, where a single DC-DC converter can serve multiple sub-panels within a group. This merging approach reduces the total component count and production cost while maintaining the required power delivery capability.
3Device complexity
If a fixed PDN configuration is used, then device complexity is reduced, but power consumption efficiency deteriorates
Solution Approach 1:
The system dynamically reconfigures the connection between DC-DC converters and sub-panels using the switch network based on real-time power requirements. The PDN controller adjusts which converters are connected to which sub-panels dynamically, allowing flexible power distribution with fewer converters than sub-panels.
Solution Approach 2:
The PDN configuration parameters (switch states, converter-sub-panel connections) are changed dynamically based on the integrated image data and power requirements. This allows the system to optimize power distribution efficiency by adjusting the PDN configuration to match the actual power demands of different display regions.
4Productivity
If window size for frame integration is increased, then processing efficiency is improved, but response time to power changes deteriorates
Solution Approach 1:
The window size for frame integration is not fixed but can be adjusted dynamically based on the current operating conditions and power requirements. The PDN controller can modify the integration window size to balance processing efficiency with response time requirements.
Solution Approach 2:
The system changes the integration window parameter adaptively - using larger windows when processing efficiency is prioritized and smaller windows when faster response to power changes is needed. This parameter adjustment allows the system to optimize performance based on current operational demands.
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 and production costs by using fewer converters than sub-panels, while improving converter operation efficiency and reducing power consumption in OLED display systems.
Implementation Method 1
The PDN may be controlled by a control signal, respectively deliver voltages determined by the control signal to the plurality of sub-panels
Implementation Method 2
a PDN including a switch network and a plurality of DC-DC converters
Data Source
AI summary
Provided is a display device including a display panel, a power delivery network (PDN), an image controller, and a PDN controller. The display panel may include a plurality of sub-panels. The PDN may be controlled by a control signal, respectively deliver voltages determined by the control signal to the plurality of sub-panels, and generate state information for determining the control signal. The image controller may receive to store frame image data, determine a number of frames to be integrated according to a window size, and integrate the frame image data of frames in the determined number into one image to generate integrated image data. The PDN controller may generate the control signal and a size adjusting signal based on the state information and the integrated image data, provide the generated control signal to the PDN, and may provide the generated size adjusting signal to the image controller. The size adjusting signal may adjust the window size.