Display Device Current Limiter for Frame Load Management
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Solution Overview
Problem
Display devices face challenges in managing rapid changes in frame loads, leading to over-current issues and image quality degradation due to the need for frame memory comparisons, which increase manufacturing costs and power consumption.
Innovation Solution
A display device with a current limiter that adjusts the scale factor based on previous frame loads without using frame memory, applying a time weight to gradually decrease the scale factor and prevent over-currents, ensuring real-time adjustment and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frame memory comparisons are used to manage frame load changes, then over-current issues can be detected, but manufacturing costs and power consumption increase
Solution Approach 1:
The patent extracts the essential function of frame load comparison from the complex frame memory system. Instead of storing and comparing entire frame images, it only extracts and compares frame load values (numerical representations of power consumption), achieving the same over-current detection purpose with significantly reduced memory requirements and power consumption.
Solution Approach 2:
The patent changes the parameter being monitored from complete frame image data to a simplified frame load parameter. By representing each frame's power consumption characteristics through a single load value rather than storing pixel data, the system achieves effective over-current detection while minimizing memory usage and power consumption.
2Reliability
If frame memory comparisons are used to manage frame load changes, then over-current issues can be detected, but manufacturing costs increase
Solution Approach 1:
The patent extracts the essential function of frame load comparison from the complex frame memory system. Instead of storing and comparing entire frame images, it only extracts and compares frame load values (numerical representations of power consumption), achieving the same over-current detection purpose with significantly reduced memory requirements and power consumption.
Solution Approach 2:
The patent replaces expensive, large-capacity frame memory with a simple numerical comparison mechanism using minimal storage. The frame load values are temporary numerical representations that can be easily stored and compared without requiring persistent large-scale memory infrastructure, thereby reducing manufacturing costs.
3Use of energy by stationary object
If scale factor is adjusted rapidly to prevent over-currents, then power consumption is reduced, but image distortion increases
Solution Approach 1:
The patent applies preliminary action by proactively adjusting the scale factor before over-current conditions occur. By monitoring frame load values and predicting potential over-current situations, the system pre-adjusts the scale factor to prevent power consumption spikes, thereby reducing actual power usage while maintaining image quality through smooth transitions.
Solution Approach 2:
The patent implements dynamic scale factor adjustment that adapts to changing frame load conditions. The scale factor is not fixed but dynamically modified based on real-time frame load comparisons, allowing the system to optimize power consumption while maintaining image quality through continuous adaptation rather than abrupt changes.
4Stability of the object's composition
If scale factor remains constant, then image quality is maintained, but over-current issues occur during rapid frame load changes
Solution Approach 1:
The patent implements feedback control by continuously monitoring frame load values and using this information to adjust the scale factor. The system compares current frame load with previous frame load and dynamically modifies the scale factor in response, creating a closed-loop control system that prevents over-current conditions while adapting to changing image content requirements.
Solution Approach 2:
The patent implements dynamic scale factor adjustment that adapts to changing frame load conditions. The scale factor is not fixed but dynamically modified based on real-time frame load comparisons, allowing the system to optimize power consumption while maintaining image quality through continuous adaptation rather than abrupt changes.
Data Source
AI summary
A display device includes: a display panel including pixels emitting light, based on a data voltage; a current limiter for determining a scale factor by comparing a previous frame load with a predetermined threshold load, and generating compensated image data by applying the scale factor to current image data as input image data of a current frame to adjust the data voltage; and a data driver for converting the compensated image data into the data voltage and providing the data voltage to the display panel.