Electrooptical Device Signal Distribution Circuit
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Solution Overview
Problem
In high-definition electrooptical devices, variations in power supply voltage between driving circuits cause differences in data signals, leading to deterioration in image quality due to the output of selection signals.
Innovation Solution
The electrooptical device employs a configuration with multiple supply units and distribution units that use adjustment values to compensate for variations in data signals, ensuring consistent luminance across pixels by generating signals based on basic signals and adjustment values, and strategically disposing distribution units to minimize power consumption and image quality issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple driving circuits output data signals to reduce load, then the load on each driving circuit is reduced, but variations in power supply voltage between driving circuits cause differences in data signals leading to deterioration in image quality
Solution Approach 1:
The patent adjusts the output timing of selection signals from driving circuits to compensate for power supply voltage variations. By changing the timing parameter of selection signal output, the system equalizes data signal characteristics across multiple driving circuits, preventing image quality deterioration while maintaining reduced load distribution
Solution Approach 2:
The patent implements a feedback mechanism where the output of selection signals from one driving circuit is used to control distribution circuits, and the timing of these signals is adjusted based on observed variations in data signals. This feedback loop ensures that variations in power supply voltage do not lead to image quality deterioration
2Reliability
If a single driving circuit outputs data signals, then image quality is maintained, but a large load is applied to the single driving circuit
Solution Approach 1:
The patent divides the driving circuit system into multiple independent driving circuits, each handling a portion of the data signal output. This segmentation reduces the load on each individual driving circuit while maintaining overall system performance through coordinated operation and timing adjustment of selection signals
3Device complexity
If distribution circuits control using selection signals from only one driving circuit, then device complexity is reduced, but variations in power supply voltage cause variations in data signals between driving circuits
Solution Approach 1:
The patent changes the timing parameter of selection signal output from driving circuits to compensate for power supply voltage variations. By adjusting when selection signals are output, the system ensures that data signals from different driving circuits remain consistent in characteristic, preventing variations that would deteriorate image quality
Data Source
AI summary
A first supply circuit outputs data signals to odd-numbered distribution circuits, and outputs selection signals to all of distribution circuits. A second supply circuit outputs data signals to even-numbered distribution circuits. The odd-numbered distribution circuits distribute the data signals to signal lines using the selection signals. The even-numbered distribution circuits distribute the data signals to signal lines using the selection signals. The first supply circuit outputs the data signals generated based on digital data signals which are basic signals of the data signals and an adjustment value, to the distribution circuits.