Integrated Circuit Drive Waveform Generation for Electro-Optical Panels
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Solution Overview
Problem
Existing integrated circuit devices driving electro-optical panels, such as EPD panels, face increased processing loads due to the need for sequentially changing drive voltages, which can obstruct other processes and require significant control device involvement.
Innovation Solution
An integrated circuit device with a drive voltage output section, display data storage, and a drive waveform information output section that stores and outputs drive waveform information for basic periods, allowing for repetition and adaptation to various driving methods, reducing the processing load by automatically generating sequential drive waveforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a control device executes instructions to select sequentially changing drive voltages, then the electro-optical panel can be driven, but the processing load of the control device is increased
Solution Approach 1:
The integrated circuit device performs self-service by automatically generating sequential drive voltages based on stored waveform information, eliminating the need for continuous control device intervention. The device uses internal counters and memory to autonomously select and output appropriate drive voltages for each period, reducing the processing burden on external control devices.
Solution Approach 2:
Drive waveform information is pre-stored in the integrated circuit device for multiple periods. The device prepares all necessary drive voltage patterns in advance within its internal memory, allowing it to automatically retrieve and apply the correct waveform information during operation without requiring real-time control device processing.
2Adaptability or versatility
If drive waveform information is stored for each basic period, then adaptability to multiple driving methods is improved, but storage capacity requirements increase
Solution Approach 1:
The drive waveform information is segmented into multiple basic periods (T1 to TM), where each period represents a fundamental time unit. By dividing the overall drive cycle into discrete segments, the system can store waveform information for just these basic periods and then reuse them through repetition, significantly reducing total storage requirements while maintaining flexibility for different driving methods.
Solution Approach 2:
The stored basic period waveform information serves multiple functions and can be reused across different driving scenarios. The same basic period data can be repeated multiple times to create different drive sequences, allowing a single set of stored waveforms to support various electro-optical panel types and driving methods without requiring separate storage for each scenario.
Data Source
AI summary
An integrated circuit device generates drive waveforms which can be adapted to a plurality of panels by a function of setting a repetition period, the function setting which of periods in a drive waveform pattern is to be repeated, and a function of setting the number of times, the function setting what number of times the set period is to be repeated.