Dummy Circuits Protect Display Turn-On Circuits From Static Electricity
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Solution Overview
Problem
During the manufacturing of flat panel displays, static electricity introduced through signal lines can damage turn-on circuits, making it difficult to determine the turn-on state of subpixels, especially during the cell cutting process.
Innovation Solution
Incorporating dummy circuits connected to the signal lines with higher priority than turn-on circuits, which absorb and dissipate external static electricity before it reaches the turn-on circuits, thereby protecting them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If turn-on circuits are formed on the substrate to determine the turn-on state of subpixels, then the turn-on state can be checked, but static electricity may damage the turn-on circuits through signal lines during cell cutting
Solution Approach 1:
The patent introduces dummy circuits as intermediary elements connected to signal lines. These dummy circuits act as mediators that intercept and dissipate static electricity before it reaches the turn-on circuits, thereby protecting the turn-on circuits from damage while allowing them to function properly for determining subpixel states
2Reliability
If dummy circuits are added to protect turn-on circuits from static electricity, then circuit reliability improves, but device complexity increases
Solution Approach 1:
The patent employs dummy circuits that are intentionally designed as sacrificial, low-cost elements. These dummy circuits are meant to be damaged by static electricity rather than the expensive turn-on circuits. They serve their protective function and can be discarded or ignored, while the critical turn-on circuits remain intact and functional
Data Source
AI summary
An display device includes: a substrate; a display unit comprising subpixels positioned on the substrate; signal lines arranged on the substrate; turn-on circuits connected to the signal lines and turning on the subpixels in response to a turn-on signal supplied through the signal lines; and dummy circuits connected to the signal lines and inducing external electricity introduced through the signal lines to be introduced therein earlier than in the turn-on circuits.