Integrated Circuit Device for Electrooptic Panel Drive Waveform Compensation
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Solution Overview
Problem
Existing integrated circuit devices for electrooptic panels require large data areas to store temperature-specific look-up tables and period length data, leading to increased storage needs and processing loads, and necessitate frequent data rewriting when environmental conditions change.
Innovation Solution
An integrated circuit device that stores phase length information with an index number, allowing for reduced data storage and communication loads by using the index number instead of phase length information, and enabling common index number usage across different environmental conditions, thus minimizing data area and communication requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature-specific look-up tables and period length data are stored in the integrated circuit device, then drive waveform compensation for temperature changes is achieved, but the data area increases
Solution Approach 1:
The patent extracts only the essential period length data from the waveform information and stores it separately in a timing information storage section, while the waveform information itself is stored in a waveform information storage section. This separation allows the device to store necessary compensation data without requiring large data areas for complete temperature-specific look-up tables for all conditions.
Solution Approach 2:
The patent divides the storage function into two distinct sections: a timing information storage section for phase length information and a waveform information storage section for drive waveform data. This segmentation allows efficient storage and selective retrieval of data based on environmental conditions, reducing the overall data area requirement while maintaining compensation capability.
2Reliability
If complete waveform information is stored for all environmental conditions, then drive waveform compensation is accurate, but the communication load increases
Solution Approach 1:
The patent implements dynamic data retrieval where the timing control section selectively reads only the necessary phase length information from the timing information storage section based on current environmental conditions. This dynamic approach allows accurate compensation while minimizing communication load by transferring only essential data rather than complete waveform information for all conditions.
Solution Approach 2:
The timing information storage section acts as an intermediary that stores condensed phase length data, while the waveform information storage section contains the complete waveform data. The timing control section mediates between these sections by selecting and retrieving only the necessary phase length information, reducing communication load while maintaining compensation accuracy.
3Adaptability or versatility
If waveform information is rewritten when environmental conditions change, then drive waveform compensation is updated, but processing load increases
Solution Approach 1:
The patent segments the storage of waveform information into two separate sections, allowing the timing control section to update only the phase length information in the timing information storage section when environmental conditions change, rather than rewriting the entire waveform information. This segmentation significantly reduces processing load while maintaining adaptability to different environmental conditions.
Solution Approach 2:
The patent extracts the phase length information from the complete waveform information and stores it separately. When environmental conditions change, only this extracted phase length information needs to be updated, not the entire waveform data. This extraction approach reduces processing load while maintaining the ability to adapt to different environmental conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the data area and communication load, allowing for efficient storage and compensation of drive waveforms in response to environmental changes, such as temperature, while maintaining effective drive voltage generation for electrooptic panels.
Implementation Method 1
By applying a voltage between the top plane electrode and a segment electrode to apply an electric field on the electrophoretic particles, the electrophoretic particles move depending on the direction of the electric field
Data Source
AI summary
An integrated circuit device includes: a timing information storage section that stores phase length information in correspondence with an index number; a waveform information storage section that stores waveform information related to a plurality of drive waveforms used in response to at least one display state; a timing control section that reads an index number included for each phase in the waveform information, reads phase length information corresponding to the index number from the timing information storage section, and sequentially generates a selection signal during a drive voltage application period corresponding to a plurality of phases; and a drive waveform selection section that selects a waveform value representing a drive voltage, out of a plurality of units of waveform information stored in the waveform information storage section, in accordance with the selection signal.