Display Driving Circuit Filtering Area Reduction
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Solution Overview
Problem
Display devices require improved image quality through effective filtering of image signals applied to data lines, but existing technologies face challenges in minimizing the size of the filtering circuitry while maintaining image quality.
Innovation Solution
A driving circuit with a filtering process circuit that alternately outputs present data signals as first and second present data signals, performing convolution calculations using filtering coefficients and previous line data signals to generate filtered data signals, which are then converted to analog signals and applied to data lines, minimizing the circuit area by integrating line buffers within the driving circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a filtering process circuit is added to improve image quality, then image quality is improved, but the area of the driving circuit increases
Solution Approach 1:
The patent merges the filtering process circuit with the existing line buffers and output circuits by sharing common hardware resources. The line buffers serve dual purposes: storing data for both filtering operations and maintaining previous line data signals. The output circuits are shared between filtered and unfiltered data paths, eliminating the need for separate dedicated filtering hardware and reducing overall circuit area.
Solution Approach 2:
The patent implements multi-functionality by designing the line buffers to serve both as storage elements for filtering operations and as sources for previous line data signals. The selection circuits universally handle both filtered and unfiltered data routing. This multi-functional design allows the same hardware components to perform multiple tasks, reducing the total number of components needed and minimizing area increase.
2Area of stationary object
If line buffers are integrated into the driving circuit to minimize area, then driving circuit area is minimized, but circuit complexity increases
Solution Approach 1:
The patent segments the driving circuit into distinct functional modules: line buffers for data storage, filtering process circuits for image processing, selection circuits for signal routing, and output circuits for data transmission. Each module has a specific function and can be independently optimized. This segmentation manages complexity by organizing functions into manageable units with clear interfaces, making the overall system easier to design and maintain despite the increased functionality.
Solution Approach 2:
The line buffers perform preliminary action by pre-storing data from previous lines before filtering operations are needed. This advance preparation allows the filtering process to access historical data immediately when required, eliminating the need for complex real-time data retrieval mechanisms and simplifying the overall circuit architecture.
Data Source
AI summary
A driving circuit of a display device includes first and second line buffers, first and second output circuits, and a filtering process circuit. The first line buffer stores a first present data signal and outputs a first previous line data signal, and the second line buffer stores a second present data signal and outputs a second previous line data signal. The filtering process circuit alternately outputs the present data signal as one of the first present data signal and the second present data signal, and outputs a first filtered data signal and a second filtered data signal. The first output circuit receives the first filtered data signal and drives a first data line group of a plurality of data lines, and the second output circuit receives the second filtered data signal and drives a second data line group of the data lines.