Integrated Touch Sensor Routing Lines for Display Device Manufacturing
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Solution Overview
Problem
The manufacturing process of touch-enabled display devices is complex and costly due to the separate attachment of touchscreens to display panels, which increases production complexity and expenses.
Innovation Solution
An organic light-emitting diode display device with touch sensors integrated above an encapsulation unit, where routing lines on different planes overlap and are electrically connected through contact holes, eliminating the need for a separate attachment process and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a touchscreen is separately manufactured and attached to the front surface of the display panel, then the touch functionality is achieved, but the manufacturing process becomes complicated and costs increase
Solution Approach 1:
The patent merges the touchscreen and display panel into a single integrated structure. The touch sensor is formed on the same substrate as the display panel, with routing lines extending from the touch sensor through the display panel structure. This integration eliminates the separate attachment process, reducing manufacturing complexity while maintaining touch functionality.
Solution Approach 2:
The display panel structure is designed to serve multiple functions: it acts as both the display substrate and the touchscreen substrate. The routing lines serve dual purposes by providing both display signal transmission and touch signal transmission. This multi-functionality reduces the need for separate components and attachment processes.
2Reliability
If a touchscreen is separately manufactured and attached to the front surface of the display panel, then the touch functionality is achieved, but manufacturing costs increase due to the addition of attachment process
Solution Approach 1:
The patent combines the touchscreen manufacturing with the display panel manufacturing into a single integrated process. The touch sensor, routing lines, and display elements are formed simultaneously on the same substrate, eliminating the need for separate attachment processes and associated costs.
Solution Approach 2:
The routing lines are formed in advance during the display panel manufacturing process, extending from the touch sensor through the display panel structure. This preliminary formation of routing paths eliminates the need for subsequent attachment and connection processes, reducing manufacturing costs.
3Ease of manufacture
If routing lines are disposed on the same plane, then the manufacturing process is simpler, but connection faults between routing lines may occur
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement of routing lines to a three-dimensional stacked arrangement. Routing lines are disposed on different planes (first plane and second plane), with vertical contact holes providing connections between planes. This dimensional change eliminates interference between routing lines while maintaining connection reliability.
Solution Approach 2:
The routing line structure is segmented into multiple discrete planes with vertical connections. Instead of continuous planar routing, the signal path is divided into segments on different planes connected by vertical contact holes, reducing interference and improving connection reliability.
Data Source
AI summary
Disclosed is a display device capable of reducing the thickness and the weigh thereof. In an organic light-emitting diode display device having a touch sensor, a plurality of routing lines, which are connected respectively to a plurality of touch sensors disposed on an encapsulation unit, are disposed on different planes so as to overlap each other and are electrically connected to each other through a plurality of routing contact holes. Thereby, a connection fault between the routing lines is prevented. In addition, through the provision of the touch sensors above the encapsulation unit, a separate attachment process is unnecessary, which results in a simplified manufacturing process and reduced costs.