Touch Sensor Integrated Display Device Thickness Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch sensor integrated type display devices face challenges with increased thickness and manufacturing complexity, particularly with add-on type sensors that affect display brightness and on-cell type sensors that require additional layers and processes.
Innovation Solution
A touch sensor integrated type display device that shares a touch sensing element with the display device, using metal and transparent conductive materials for electrodes and connecting wires, and a simplified manufacturing process to reduce thickness and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If add-on type touch sensor is mounted on display device, then touch sensing functionality is achieved, but device thickness increases and display brightness decreases
Solution Approach 1:
The patent merges the touch sensing electrode with the common electrode of the display device. The touch sensing electrode is formed on the same substrate as the common electrode, eliminating the need for separate add-on touch sensor components. This integration reduces overall device thickness while maintaining touch sensing functionality.
Solution Approach 2:
The common electrode serves dual functions: as the common electrode for display operation and as the touch sensing electrode for touch input detection. This multi-functionality eliminates the need for additional dedicated touch sensor layers, reducing thickness while providing touch capability.
2Length of stationary object
If on-cell type touch sensor is formed on glass substrate, then device thickness is reduced, but manufacturing complexity and process number increase
Solution Approach 1:
The patent combines the formation of the common electrode and touch sensing electrode into a single manufacturing process step. Both electrodes are formed simultaneously on the same substrate using the same process sequence, reducing the total number of manufacturing steps while achieving thin-device structure.
Solution Approach 2:
The same electrode structure serves both display and touch functions, allowing a single manufacturing process to create both the common electrode for display operation and the touch sensing electrode for input detection, thereby reducing process complexity.
3Adaptability or versatility
If on-cell type touch sensor uses additional electrode layers, then touch sensing capability is integrated, but manufacturing cost increases
Solution Approach 1:
The patent merges the common electrode and touch sensing electrode into a single structural element formed in the same manufacturing process. This eliminates the need for separate electrode layers and reduces material costs while maintaining full touch sensing capability.
Solution Approach 2:
The common electrode performs dual functions as both display common electrode and touch sensing electrode, reducing material requirements and manufacturing steps, thereby lowering production costs while providing integrated touch sensing capability.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A touch sensor integrated type display device includes a plurality of first electrodes arranged on a substrate in parallel in a first direction; a plurality of second electrodes arranged in parallel in the first direction and a second direction crossing the first direction without contacting with the plurality of first electrodes; a plurality of first connecting wires, each first connecting wire being connected with at least one of the plurality of the first electrodes; and a plurality of second connecting wires, each second connecting wire connecting the second electrodes to each other in the second direction, wherein a touch driving voltage is supplied to the plurality of first connecting wires and a common voltage is supplied to the plurality of second connecting wires so that mutual capacitance is generated between the a plurality of first electrodes and the plurality of second electrodes.