Display Driver IC Power Management via Line Data Comparison
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Solution Overview
Problem
Display driver integrated circuits (DDIs) face challenges in achieving high performance and low power consumption, especially when dealing with repeated line data or gray patterns, which can lead to inefficient processing and increased power consumption.
Innovation Solution
The DDI method involves comparing previous and current line data to determine if the intermediate processing circuit should be activated or deactivated, using techniques such as gating data or clock signals, and including a gray pattern detector to control the activation of processing circuits based on detected patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the intermediate processing circuit is always activated to process line data, then processing performance is maintained, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the intermediate processing circuit's operation state changeable. The circuit is dynamically activated or deactivated based on whether line data repetition is detected, transitioning from a static always-on state to a dynamic conditional state that adapts to actual processing needs.
Solution Approach 2:
The patent changes the operational parameter of the intermediate processing circuit from a constant active state to a variable state that depends on detected line data characteristics. When line data repetition is detected, the circuit parameter changes to deactivated state; otherwise, it remains active.
2Use of energy by moving object
If the intermediate processing circuit is deactivated when line data is repeated, then power consumption is reduced, but processing delay may occur
Solution Approach 1:
The patent applies preliminary action by detecting line data repetition before the data enters the intermediate processing circuit. The detection occurs in advance, allowing the system to pre-deactivate the circuit before processing begins, avoiding unnecessary processing delays while ensuring power savings are achieved at the optimal time.
Solution Approach 2:
The patent implements feedback by continuously monitoring line data for repetition patterns and using this information to control the activation state of the intermediate processing circuit. The feedback loop ensures that the circuit state adjusts appropriately based on actual data characteristics, balancing power savings with processing requirements.
3Use of energy by moving object
If line data comparison is performed to detect repetition, then power consumption is optimized, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the data processing function into separate modules: a line data comparison unit that detects repetition patterns and an intermediate processing circuit that performs actual data processing. This segmentation allows the comparison function to be implemented with simpler logic, reducing overall device complexity while enabling power optimization.
Solution Approach 2:
The patent introduces an intermediary comparison unit that sits between the data input and the intermediate processing circuit. This intermediary component handles the complexity of line data comparison and repetition detection, shielding the main processing circuit from this complexity while enabling intelligent power management based on comparison results.
Data Source
AI summary
A method of operating a display driver IC (DDI) includes comparing previous line data with current line data and the R, G, and B components of a color data signals, and controlling whether to activate part of an intermediate processing circuit to process the current line data or more than a single component of the color data signal according to a comparison result.