Display Driving Control Using Data Transitions in Double-Bank Panels
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Solution Overview
Problem
Existing display devices face challenges in efficiently managing current consumption during data transitions, particularly in double-bank type displays, where both banks of source driver ICs are often activated simultaneously, leading to unnecessary power usage.
Innovation Solution
A method and device that selectively uses single-bank or double-bank driving by detecting data transitions in a double-bank type display device, where pixel data is compared to a reference value, and power is cut off to source driver ICs when data changes are minimal, allowing for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If double-bank driving is used in a double-bank type display device, then the display device can drive both banks of source driver ICs simultaneously to support larger display panels, but current consumption increases due to unnecessary activation of both banks when data transitions are minimal
Solution Approach 1:
The display device dynamically switches between double-bank driving and single-bank driving modes based on real-time detection of data transitions. When data transitions are detected in a specific bank, that bank is activated; when no transitions occur, the bank is deactivated. This dynamic adaptation resolves the contradiction by adjusting the driving mode to match actual display needs, reducing current consumption while maintaining productivity.
Solution Approach 2:
The system changes the operational parameter (driving mode) from fixed double-bank driving to variable single-bank or double-bank driving based on data transition characteristics. By monitoring data changes and adjusting the driving mode accordingly, the system optimizes the balance between driving capability and energy consumption, resolving the technical contradiction.
2Productivity
If both banks of source driver ICs are activated simultaneously, then the display device can handle high data throughput requirements, but power usage increases unnecessarily when data changes are minimal
Solution Approach 1:
Instead of always activating both banks (excessive action), the system activates only the necessary bank based on data transition detection. When one bank experiences no data transitions, it is deactivated, applying partial action only where needed. This resolves the contradiction by eliminating unnecessary power consumption while maintaining sufficient data throughput.
Solution Approach 2:
The system extracts and removes the unnecessary bank from active operation when data transitions are minimal in that bank. By taking out the inactive bank from the dual-bank operation, the system reduces power consumption while maintaining the required data throughput through the remaining active bank.
3Use of energy by moving object
If single-bank driving is used to reduce current consumption, then power efficiency improves, but the display device cannot handle large display panels requiring both banks
Solution Approach 1:
The system dynamically adjusts the driving mode based on the actual display content and data transition patterns. For large display panels, the system can operate in double-bank mode when both banks require data transmission, and switch to single-bank mode when only one bank has active data transitions. This dynamic approach resolves the contradiction by allowing the system to handle large panels while optimizing power efficiency based on actual needs.
Solution Approach 2:
The display device achieves multi-functionality by being capable of operating in both single-bank and double-bank modes within the same hardware architecture. This universality allows the device to support large display panels (requiring double-bank capability) while also achieving power efficiency (through single-bank operation) depending on the specific operating conditions.
Data Source
AI summary
A method of driving the display device can include receiving pixel data of an input image, storing the pixel data in a memory, comparing an amount of change between Nth (N is a natural number) line data and (N+1)th line data stored in the memory with a reference value, sequentially transmitting the Nth line data and the (N+1)th line data to the source driver ICs when the amount of change between the Nth line data and the (N+1)th line data is greater than or equal to the reference value, and cutting off driving power of the source driver ICs when the amount of change between the Nth line data and the (N+1)th line data is less than the reference value. Accordingly, the current consumption can be reduced.