Screen Control With Pre-Generated Idle Images for Low-Latency Switching
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Solution Overview
Problem
Conventional screen systems experience UX latency and inconsistent picture quality when switching between idle and working modes due to inefficient idle image generation and mode transition mechanisms.
Innovation Solution
A screen control system that employs software and hardware mechanisms to select optimal idle mode switch procedures, utilizing WDMA or GPU for idle image generation, and includes overflow protection to ensure consistent picture quality and minimize latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional idle mode switching mechanism is used, then power saving is achieved, but UX latency increases to milli second or second level
Solution Approach 1:
The patent applies preliminary action by pre-generating idle images in advance and storing them in a buffer before actual idle mode activation. When idle mode is needed, the system can immediately display the pre-prepared idle image without waiting for real-time generation, thus reducing UX latency while maintaining power saving benefits. This is implemented through the idle image buffer mechanism that prepares display content ahead of time.
2Speed
If frequent mode switching between idle and working is performed, then responsiveness to user commands is improved, but picture quality consistency deteriorates
Solution Approach 1:
The patent implements feedback mechanisms through hardware-level status monitoring and synchronization. The system continuously monitors display state and user input, providing feedback to adjust idle mode activation timing and image generation parameters. This ensures that mode switching occurs at optimal moments that maintain picture quality consistency while preserving rapid response to user commands. The hardware feedback loop detects when idle images should be activated or deactivated based on actual display conditions.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting idle image generation parameters such as resolution, color depth, and refresh rate based on current system state and user behavior patterns. When switching between idle and working modes, the system modifies these parameters to ensure seamless transitions that maintain consistent picture quality. The system adapts parameters like image buffering size and generation quality based on detected usage patterns.
3Productivity
If WDMA is used for idle image generation, then generation speed is improved, but overflow errors may occur
Solution Approach 1:
The patent applies beforehand cushioning by implementing overflow protection mechanisms and buffer management systems that prevent WDMA overflow errors before they occur. The system includes hardware-level buffer overflow detection and prevention circuits that monitor memory access patterns and halt WDMA operations when potential overflow conditions are detected. This cushioning approach ensures reliable high-speed image generation by preventing errors before they can affect system stability.
Data Source
AI summary
A screen system control method, applied to a screen system comprising a screen, a host and at least one idle image generating module. The method comprises: (a) establishing software flow and error handling mechanisms to switch the screen system between working mode and idle mode; (b) establishing different mode switch mechanism for different screen types and application scenarios; (c) establishing hardware circuit of idle controller and the other display-related engines to automatically accomplish the mode switch operations between working mode and idle mode; and (d) establishing an overflow protection mechanism for write direct memory access (WDMA).