Display GRAM Power-State Switching for Low-Refresh Image Retention
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Solution Overview
Problem
Existing electronic devices face challenges in efficiently managing power consumption in display panels due to the high refresh rates required for graphic random access memory (GRAM), leading to increased energy usage.
Innovation Solution
The implementation of a graphic random access memory (GRAM) with adjustable activation states, allowing for a lower power mode (second activation state) to maintain images, and a refresh rate lower than the reference rate, coupled with strategic state changes to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high refresh rates are used for GRAM in display panels, then image quality and stability are improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic refresh rate adjustment where the GRAM operates at different refresh rates depending on the display state. During idle periods, the refresh rate is reduced to maintain image stability while minimizing power consumption. When user interaction is detected, the refresh rate is dynamically increased to ensure optimal image quality, thus resolving the contradiction between stability and energy usage.
Solution Approach 2:
The patent changes the operational parameters of the GRAM by switching between multiple activation states (first, second, and third activation states) with different power consumption characteristics. By adjusting the refresh rate parameter based on system state, the patent achieves lower power consumption during idle periods while maintaining image stability when needed, directly addressing the technical contradiction.
2Productivity
If GRAM operates at high power to maintain image quality, then display performance is improved, but battery life decreases
Solution Approach 1:
The patent implements periodic monitoring of display state and user interaction to determine when to switch between activation states. During idle periods, the system periodically checks for user interaction and maintains the second activation state with lower power consumption. When interaction is detected, it transitions to the first activation state for optimal performance, thus balancing display performance with battery life extension.
Solution Approach 2:
The patent dynamically adjusts the GRAM activation state based on real-time system conditions. By transitioning between different activation states with varying power consumption levels, the system maintains display performance during active use while extending battery life during idle periods, resolving the contradiction between productivity and duration.
3Use of energy by moving object
If GRAM uses low power mode to reduce energy consumption, then battery life is extended, but image maintenance capability deteriorates
Solution Approach 1:
The patent changes the operational parameters by implementing multiple activation states with different power consumption and image maintenance characteristics. The second activation state operates at lower power while maintaining sufficient image stability for idle periods. When image quality is critical, the system transitions to the first activation state, thus balancing power consumption with reliability through parameter adjustment.
Solution Approach 2:
The patent implements feedback mechanisms that continuously monitor display state and user interaction to determine the appropriate activation state. This feedback loop ensures that the system maintains adequate image maintenance capability during idle periods while extending battery life, and automatically transitions to higher performance modes when reliability is needed, resolving the contradiction between power consumption and reliability.
Data Source
AI summary
An electronic device may include: a display driving circuit including a graphic random access memory (GRAM); and a display panel, wherein the display driving circuit can be configured to: display an image on the display panel on the basis of scanning the image in the GRAM having a first active state for acquiring power within a first range; and change, in response to the scanning, the state of the GRAM from the first active state to a second active state for acquiring power within a second range that is lower than the power within the first range, in order to maintain the image in the GRAM. The refresh rate for the image in the GRAM can be lower than a standard refresh rate.