LCD Repair Lines on Color Filter Substrate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LCD panels face challenges with high resistance and power consumption due to lengthy repair lines that are disposed outside the display area, leading to reduced success rates in repairing open circuits and limited space for additional repair lines.
Innovation Solution
The repair lines are formed on a separate color filter substrate instead of the TFT substrate, allowing for shorter lengths identical to the data lines, reducing resistance and enabling more efficient signal transmission and increased repair capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repair lines are disposed outside the display area on the TFT substrate, then signal transmission backup is provided, but the transmission route becomes too long causing high resistance and RC delay effect
Solution Approach 1:
The patent moves the repair lines from the TFT substrate to the color filter substrate, utilizing a different spatial dimension (the opposite substrate) to create a parallel transmission route. This dimensional shift allows the repair lines to follow the same geometric path as the data lines without being constrained by the TFT substrate layout, thereby reducing transmission route length while maintaining signal transmission backup capability.
2Reliability
If repair lines are disposed outside the display area, then signal backup is achieved, but power consumption increases due to long transmission route
Solution Approach 1:
By relocating repair lines to the color filter substrate, the patent creates a parallel transmission path that mirrors the data line geometry. This dimensional relocation reduces the transmission route length, which directly decreases the resistance and RC delay effect, thereby reducing power consumption while maintaining the signal backup function.
3Ease of repair
If repair lines are disposed on the TFT substrate, then repair capability is provided, but space for additional repair lines is limited
Solution Approach 1:
The patent utilizes the color filter substrate as an additional dimensional space for routing repair lines. This substrate provides ample area outside the display region, enabling the placement of multiple repair lines without constraining the TFT substrate layout or display area. The color filter substrate's larger available space allows for enhanced repair capability with multiple parallel repair routes.
4Ease of repair
If laser welding method is used to connect data line to repair line, then open circuit repair is achieved, but transmission route becomes too long causing high resistance
Solution Approach 1:
By forming repair lines on the color filter substrate that parallel the data lines on the TFT substrate, the patent creates a direct geometric correspondence between the two. When laser welding connects data lines to repair lines, the transmission route follows this parallel path, which is significantly shorter than routing through the display area boundaries. This reduces resistance loss while maintaining open circuit repair capability.
Data Source
AI summary
A liquid crystal display panel includes a repair line for substituting open-circuited signal lines. Signal lines are disposed over a first side of a first substrate of the liquid crystal display panel for data transmission. Repair lines are disposed over a first side of a second substrate of the liquid crystal display panel for substituting open-circuited signal lines. The first side of the first substrate faces the first side of the second substrate. A liquid crystal layer is disposed between the first and second substrates of the liquid crystal panel.