Timing Controller Frame Shift Logic for Low-Power Displays
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Solution Overview
Problem
Existing display devices face challenges in minimizing power consumption when driven at various image refresh rates, particularly during frequent frame shifts required for displaying content like movies or games.
Innovation Solution
A display device with a timing controller that compares input command numbers to threshold values, shifting or maintaining frames based on the comparison, and includes a command sensor and frequency/luminance controller to manage frame shifts and power modes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display device operates at high image refresh rates to reduce frame shift frequency, then power consumption is reduced, but image quality and responsiveness deteriorate
Solution Approach 1:
The patent implements dynamic frame shifting control where the timing controller adjusts the frame shifting operation based on real-time command processing needs. The system dynamically determines whether to shift frames or maintain current frames by comparing command input frequencies against threshold values, enabling adaptive operation between power-saving mode (higher refresh rates) and quality mode (frame shifting) as required by different usage scenarios
2Speed
If the timing controller processes all commands immediately, then command response speed is improved, but power consumption increases due to frequent frame shifts
Solution Approach 1:
The timing controller performs preliminary evaluation of commands by counting the number of commands received within a specific time period and comparing this count against predetermined threshold values before executing frame shifting operations. This preliminary action filters out unnecessary frame shifts by identifying patterns where commands are received at lower frequencies, thereby reducing power consumption while maintaining acceptable response speed for genuine user interactions
Solution Approach 2:
The system implements feedback control by continuously monitoring the number of commands received and using this information to adjust frame shifting behavior. The timing controller feeds back the command count information to determine whether frame shifting should occur, creating a closed-loop system that balances responsiveness with power consumption based on actual usage patterns
Data Source
AI summary
A display device includes a pixel unit including pixels connected to data lines and scan lines, and a timing controller for comparing input numbers of commands included in command data with threshold values which corresponds to the input numbers, and shifting or maintaining a frame, which corresponds to a comparison result.