Electro-optical Device Parallel Signal Line Selection
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Solution Overview
Problem
As the resolution and driving speed of liquid crystal devices increase, it becomes difficult to secure sufficient writing time for pixels, leading to challenges in achieving high-quality image display.
Innovation Solution
The electro-optical device employs a method where a selection signal output circuit simultaneously selects sets of adjacent signal lines for a partial period within a time-divided horizontal scanning period, allowing the same image signal to be supplied to multiple signal lines, and changes the combination of selected switches at predetermined intervals, enabling efficient image signal distribution across pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the resolution and driving speed are increased, then the image quality and response speed are improved, but the writing time to pixels becomes insufficient
Solution Approach 1:
The patent merges adjacent signal lines into groups and simultaneously selects multiple signal lines within each group through switch circuits. This allows the same image signal to be supplied to multiple signal lines in parallel, effectively increasing the writing speed without sacrificing writing time, thus resolving the contradiction between high driving speed and sufficient writing time.
2Manufacturing precision
If the resolution is increased, then the display quality is improved, but the writing time to pixels becomes insufficient
Solution Approach 1:
The patent groups adjacent signal lines and simultaneously supplies image signals to multiple signal lines within each group through switch circuits. This parallel supply approach maintains sufficient writing time even as resolution increases, allowing high display quality to be achieved without compromising writing time.
3Loss of time
If sequential selection of data lines is used, then the writing time is secured, but the driving speed is limited
Solution Approach 1:
The patent combines sequential selection with simultaneous selection by dividing signal lines into groups. Within each group, multiple signal lines are simultaneously selected through switch circuits, while groups are processed sequentially. This hybrid approach secures sufficient writing time while significantly increasing driving speed compared to purely sequential selection.
Solution Approach 2:
The patent segments the signal lines into multiple groups that can be processed in parallel. Each group is handled by dedicated switch circuits that can simultaneously select multiple signal lines. This segmentation enables parallel processing of signal line groups, increasing overall driving speed while maintaining adequate writing time for each group.
Data Source
AI summary
The selection signal output circuit outputs a selection signal for simultaneously selecting a set of switches, which correspond to a set of adjacent signal lines, among k switches in a partial period obtained by time-dividing a horizontal scanning period, and outputs a selection signal for selecting remaining switches among the k switches one at a time in a remaining period of the time-divided horizontal scanning period, and the image signal output circuit supplies a same image signal to a set of adjacent signal lines corresponding to the simultaneously selected set of switches in a partial period obtained by time-dividing the horizontal scanning period.