Phase-Difference Correction Circuit Layout for Electro-Optical Apparatus
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Solution Overview
Problem
The miniaturization of electro-optical apparatuses, such as liquid-crystal devices, is hindered by the need for a wide space for phase-difference correction circuits and signal wiring, which complicates the layout and increases the size of the device substrate.
Innovation Solution
The implementation of a drive circuit configuration with a phase-difference correction circuit that connects directly to the drive circuits without branching, allowing for precise phase correction of clock signals and enabling simplified wiring, thereby reducing the space required on the device substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a phase-difference correction circuit is provided to correct the phase difference between clock signals, then the drive operation precision is improved, but the device substrate area increases due to additional wiring space requirements
Solution Approach 1:
The patent merges the phase-difference correction circuit with the drive circuit by sharing common signal lines. The correction circuit is integrated into the drive circuit structure, allowing both functions to coexist without requiring separate dedicated wiring spaces, thus improving precision while minimizing area increase.
Solution Approach 2:
The signal lines are designed to serve multiple functions: they carry clock signals to the drive circuit and simultaneously provide phase-difference correction functionality. This multi-use approach eliminates the need for separate dedicated wiring for phase correction, reducing the overall substrate area required.
2Power
If the drive circuit is divided into multiple sections with individual phase-difference correction circuits, then the drive power distribution is improved, but the device complexity and wiring space requirements increase
Solution Approach 1:
The drive circuit is divided into multiple sections, each capable of independent operation with appropriate power distribution. The phase-difference correction functionality is segmented and distributed across these sections, allowing localized correction without requiring a single complex centralized circuit, thus managing complexity while maintaining power distribution efficiency.
Solution Approach 2:
The patent transitions from a planar wiring layout to a three-dimensional signal distribution approach. Signal lines are routed through multiple layers and dimensions, allowing phase-difference correction circuits to be positioned and connected in a way that reduces overall wiring complexity and space requirements while maintaining proper power distribution across divided circuit sections.
Data Source
AI summary
The invention provides an electro-optical apparatus that can include a clock-signal terminal and a phase-difference correction circuit that are connected without branching, and the phase-difference correction circuit and one of scanning-line drive circuits are connected without branching. A clock signal can be supplied to the one of the scanning-line drive circuits through the phase-difference correction circuit. Then the one of the scanning-line drive circuits and the other of the scanning-line drive circuits are connected without branching, and a clock-signal line which supplies the clock signal from the one of the scanning-line drive circuits to the other of the scanning-line drive circuits can be provided.