Display Module Input Sensing Unit Segmented Conductive Layers
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Solution Overview
Problem
Display devices face reliability issues due to disconnected sensing lines, which can prevent driving signals from being transmitted to sensing sensors, especially when affected by external impacts or foreign substances.
Innovation Solution
A display module with an input sensing unit that includes a first conductive layer with sensing electrodes and auxiliary lines, a first insulation layer with contact holes, and a second conductive layer with sensing lines that contact the auxiliary lines through these holes, enhancing electrical connectivity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing lines are used to transmit driving signals to sensing sensors, then signal transmission is achieved, but the sensing lines can be disconnected by external impact or foreign substances, reducing reliability
Solution Approach 1:
The sensing line is divided into multiple segments: the first sensing line in the active area, the auxiliary sensing line in the non-active area, and connection patterns that link them. This segmentation allows the system to maintain functionality even if one segment is damaged, as the other segments can still transmit signals.
Solution Approach 2:
The auxiliary sensing line is pre-configured in the non-active area and connected to the first sensing line through connection patterns before any damage occurs. This preliminary setup ensures that if the first sensing line is disconnected by external impact or foreign substances, the auxiliary sensing line is already in place to take over and maintain signal transmission to the sensing sensors.
2Reliability
If the sensing unit is configured with multiple layers and conductive patterns, then reliability is improved through redundancy, but device complexity increases
Solution Approach 1:
The auxiliary sensing line serves multiple functions: it acts as a backup transmission path for the first sensing line, provides additional signal routing options, and can independently sense inputs in the non-active area. This multi-functionality justifies the added structural elements by providing both redundancy and enhanced capability.
Solution Approach 2:
The sensing unit is extended into the non-active area (another spatial dimension) where the auxiliary sensing line is positioned. This dimensional expansion allows the auxiliary line to overlap with and support the first sensing line without interfering with the active display area, thereby adding redundancy while minimizing impact on the primary function.
Data Source
AI summary
The display module includes a display panel and an input sensing unit disposed on the display panel that includes an active area and a non-active area adjacent to the active area. The input sensing unit includes a first conductive layer that includes a plurality of sensing electrodes that overlap the active area and a plurality of auxiliary lines that overlap the non-active area and are electrically connected to the sensing electrodes, a first insulation layer that includes a plurality of contact holes that respectively overlap the auxiliary lines and are disposed on the first conductive layer, a second conductive layer that includes a plurality of sensing lines that overlap the non-active area and respectively contact the auxiliary lines through the contact holes, and a second insulation layer disposed on the second conductive layer.