Electrooptical Device Signal Distribution Circuit Phase Control
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Solution Overview
Problem
High-definition electrooptical devices face image quality deterioration due to variations in operation conditions between driving circuits that supply or do not supply selection signals, leading to differences in power supply voltage and output timing of data signals.
Innovation Solution
The electrooptical device employs a configuration with multiple signal line groups and generation circuits, where each generation circuit generates data and selection signals for its respective signal line group, and a signal distribution circuit that alternates between using selection signals from different generation circuits to reduce operational differences and phase differences, thereby stabilizing data signal output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple driving circuits are used to output data signals, then the load on each driving circuit is reduced, but variations in operation conditions between driving circuits cause variations in data signals and deteriorate image quality
Solution Approach 1:
The patent divides the signal lines into multiple groups (first signal line group, second signal line group, etc.) and assigns different driving circuits to different groups. This segmentation allows each driving circuit to operate under more manageable conditions while maintaining overall system performance through coordinated operation.
Solution Approach 2:
Instead of having all driving circuits operate independently and directly drive their respective signal lines, the patent inverts the approach by having driving circuits output selection signals to a distribution circuit, which then distributes data signals to the appropriate signal lines. This inversion equalizes the operation conditions of all driving circuits.
2Device complexity
If selection signals from only one driving circuit are used to control distribution circuits, then the system is simplified, but variations in operation conditions between driving circuits cause variations in data signals and deteriorate image quality
Solution Approach 1:
The patent combines the selection signals from multiple driving circuits through a distribution circuit. The distribution circuit receives selection signals from all driving circuits and integrates them to control the distribution of data signals, ensuring that all driving circuits operate under equal conditions while maintaining system simplicity.
3Reliability
If all selection signals from all driving circuits are supplied to distribution circuits, then complete control is achieved, but phase differences between corresponding selection signals from different driving circuits may occur, shortening the active period and deviating output timing
Solution Approach 1:
The distribution circuit acts as an intermediary between the multiple driving circuits and the signal lines. It receives selection signals from all driving circuits, synchronizes them, and then distributes data signals to the appropriate signal lines. This intermediary function eliminates phase differences and timing deviations that would occur if selection signals were directly supplied to distribution circuits without coordination.
Data Source
AI summary
An electrooptical device includes: a first signal line group; a second signal line group; a signal distribution circuit that executes a distribution operation of distributing first data signals to signal lines in the first signal line group and distributing second data signals to signal lines in the second signal line group; a first supply circuit that supplies the first data signals to the signal distribution circuit and supplies first selection signals for controlling distribution of the first data signals to the signal lines in the first signal line group; a second supply circuit that supplies the second data signals to the signal distribution circuit and supplies second selection signals for controlling distribution of the second data signals to the signal lines in the second signal line group; and a selection circuit that controls output of the first selection signals and the second selection signals to the signal distribution circuit.