Alternating Leading-Edge Trailing-Edge Driving Circuit for Display Crosstalk
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Solution Overview
Problem
Conventional electro-optical devices face challenges in preventing horizontal crosstalk due to voltage changes in data lines, leading to complications in device structure and increased power consumption, which affects display quality.
Innovation Solution
A driving circuit that alternates between leading-edge and trailing-edge driving modes for different groups of data lines, ensuring that the voltage applied to pixels is adjusted based on the gray scale, thereby reducing spike generation and maintaining display quality without the need for a separate correction signal circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circuit for generating a correction signal is added to prevent horizontal crosstalk, then display quality is improved, but device structure becomes complicated and power consumption increases
Solution Approach 1:
Instead of adding a correction signal circuit to fix horizontal crosstalk, the patent inverts the approach by using alternating leading-edge and trailing-edge driving modes for different data line groups. This inversion eliminates the need for correction circuits while achieving the same display quality improvement.
Solution Approach 2:
The patent changes the driving mode parameter (alternating between leading-edge and trailing-edge driving) for different data line groups. This parameter change prevents horizontal crosstalk without requiring additional correction circuits, thus improving display quality while avoiding increased device complexity.
2Reliability
If a circuit for generating a correction signal is added to prevent horizontal crosstalk, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent inverts the conventional approach by using alternating driving modes instead of correction circuits. This eliminates the power consumption associated with correction signal generation while maintaining display quality improvement.
Solution Approach 2:
By changing the driving mode parameter alternately for different data line groups, the patent achieves horizontal crosstalk prevention without the additional power consumption that would result from operating correction signal circuits.
3Ease of operation
If leading-edge driving is used for all data lines, then voltage application is simplified, but horizontal crosstalk occurs due to voltage effective value differences
Solution Approach 1:
The patent applies different driving modes (leading-edge for some groups, trailing-edge for others) to different data line groups based on their local characteristics. This local differentiation prevents horizontal crosstalk while maintaining overall system simplicity.
Solution Approach 2:
The patent uses periodic alternation between leading-edge and trailing-edge driving modes for different data line groups. This periodic action compensates for voltage effective value differences and prevents horizontal crosstalk without complicating the overall voltage application process.
Data Source
AI summary
An electro-optical device includes pixels provided at intersections of a plurality of scanning lines and a plurality of data lines, a scanning line driving circuit for applying a selected voltage to the respective scanning lines, and a data line driving circuit for applying a turning-on voltage or a turning-off voltage to the respective data lines. The data line driving circuit alternately changes between leading-edge driving including applying the turning-on voltage to a data line corresponding to one of the pixels in a period from the starting point of a period when the selected voltage is applied to the scanning line corresponding to the pixel to the point of time after the lapse of time corresponding to the gray scale of the corresponding pixel and trailing-edge driving including applying the turning-on voltage to the data line corresponding to the pixel in a period from a point of time preceding the final point of the period when the selected voltage is applied to the scanning line corresponding to the pixel by the length of time corresponding to the gray scale of the corresponding pixel to the final point.