Touch Display Module Transparent Electrode Layer Pressure Detection
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Solution Overview
Problem
Existing touch display technologies face complexity in bonding flexible printed circuits to substrates for pressure detection, leading to increased complexity and thickness due to the need to bond circuits on both sides of the array substrate.
Innovation Solution
The touch display module features a transparent electrode layer with pressure detecting electrodes on the alignment substrate, allowing separate bonding of flexible printed circuits to the array and alignment substrates, simplifying the manufacturing process and reducing thickness by eliminating the need for dual-sided bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flexible printed circuits are bonded to both sides of the array substrate for pressure detection, then pressure detection function is achieved, but device complexity and thickness increase
Solution Approach 1:
The patent moves the pressure detecting electrodes from the array substrate plane to the alignment substrate, which is positioned in a different spatial dimension (opposite side of the liquid crystal layer). This dimensional relocation allows the pressure detection circuit to be integrated on the alignment substrate rather than requiring separate flexible printed circuits bonded to both sides of the array substrate, thereby reducing bonding complexity while maintaining pressure detection functionality.
2Reliability
If flexible printed circuits are bonded to both sides of the array substrate for pressure detection, then pressure detection function is achieved, but device thickness increases
Solution Approach 1:
The patent merges the pressure detection function with the alignment substrate by integrating the transparent electrode layer containing pressure detecting electrodes directly onto the alignment substrate. This consolidation eliminates the need for separate flexible printed circuit boards bonded to both sides of the array substrate, thereby reducing overall device thickness while preserving pressure detection capability.
3Ease of manufacture
If transparent electrode layer with pressure detecting electrodes is placed on alignment substrate, then bonding complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The liquid crystal layer serves as an intermediary medium between the array substrate and the alignment substrate with pressure detecting electrodes. This intermediary structure provides natural spacing and alignment references, allowing the transparent electrode layer to be positioned at a controlled distance from the array substrate without requiring extremely tight bonding tolerances. The liquid crystal layer fills the gap and ensures proper electrical isolation while maintaining precise relative positioning.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration simplifies the bonding process, reduces complexity, and maintains the display and touch functions while enhancing the accuracy of pressure detection without increasing the device thickness.
Implementation Method 1
a transparent electrode layer which comprises a plurality of pressure detecting electrodes and is disposed on the alignment substrate at a side away from the array substrate
Data Source
AI summary
A touch display module, includes a touch display panel which includes an array substrate and an alignment substrate arranged opposite each other; and a transparent electrode layer which includes a plurality of pressure detecting electrodes and is disposed on the alignment substrate at a side away from the array substrate.