Capacitive Touch Module with Insulating Layers for Signal Isolation
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Solution Overview
Problem
Capacitive touch modules with integrated 3D image capabilities face interference issues due to non-synchronous signals between the touch structure and liquid crystal structure, leading to incorrect touch input detection and increased thickness and weight, which are not suitable for modern display requirements.
Innovation Solution
A capacitive touch module design featuring a liquid crystal layer between two glass layers with strategically positioned electrodes and insulating layers, where synchronized driving pulses are applied to separate electrodes to ensure signal synchronization and correct touch input detection, enabling both 2D and 3D image display without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the distance between the touch structure and liquid crystal structure is reduced, then the module thickness is decreased, but signal interference occurs between the touch structure and liquid crystal structure
Solution Approach 1:
The patent introduces a first insulating layer and a second insulating layer as intermediary structures between the touch structure and liquid crystal structure. The first insulating layer is positioned between the receiving electrodes and the liquid crystal layer, while the second insulating layer is positioned between the transmitting electrodes and the liquid crystal layer. These insulating layers act as mediators that electrically isolate the touch signals from the liquid crystal driving signals, preventing signal interference while allowing the module to maintain a compact thickness.
2Adaptability or versatility
If both touch function and 2D/3D image switching function are integrated, then the device functionality is improved, but the module thickness and weight increase
Solution Approach 1:
The patent implements multi-functionality by using the same electrode structures (transmitting electrodes and receiving electrodes) for both touch detection and 2D/3D image display functions. The liquid crystal structure can be driven to display 2D images or switch to 3D image mode while the same touch electrodes continue to detect touch inputs. This universal design allows the module to perform multiple functions without requiring separate dedicated structures for each function, thereby avoiding increased thickness and weight.
Solution Approach 2:
The patent merges the touch detection function with the 2D/3D display function by integrating the touch electrode structures within the liquid crystal display structure. The transmitting electrodes and receiving electrodes are positioned within the liquid crystal layer, allowing simultaneous operation of touch detection and image display functions. This merging of functions into a single integrated structure reduces the overall module thickness and weight compared to having separate touch module and display module stacks.
3Adaptability or versatility
If both touch function and 2D/3D image switching function are integrated, then the device functionality is improved, but the device weight increases
Solution Approach 1:
The patent implements multi-functionality by using the same electrode structures (transmitting electrodes and receiving electrodes) for both touch detection and 2D/3D image display functions. The liquid crystal structure can be driven to display 2D images or switch to 3D image mode while the same touch electrodes continue to detect touch inputs. This universal design allows the module to perform multiple functions without requiring separate dedicated structures for each function, thereby avoiding increased thickness and weight.
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
The solution allows for accurate touch input detection and simultaneous 2D/3D image display, reducing module thickness and weight, making it more suitable for lightweight and slim display applications.
Implementation Method 1
The liquid crystal layer 230 is arranged between the first glass layer 210 and the second glass layer 220
Implementation Method 2
The first transparent electrodes 122 and the second transparent electrodes are used to respectively receive pulse signals having the same phase or different phases, thus the touch display can generate 3D images or two-dimensional (2d) images accordingly
Implementation Method 3
The plurality of receiving electrodes 112 will generate touch signals according to how the capacitive touch module 100 is being touched
Data Source
AI summary
A capacitive touch module includes a first glass layer, a second glass layer, a liquid crystal layer, a first insulating layer, a second insulating layer, a plurality of first electrodes, second electrodes and third electrodes. The liquid crystal layer is arranged between the first glass layer and the second glass layer. The first insulating layer is formed between the first glass layer and the liquid crystal layer. The second insulating layer is formed between the liquid crystal layer and the second glass layer. The plurality of first electrodes are formed between the liquid crystal layer and the first insulating layer along a first axis. The plurality of second electrodes are formed between the second insulating layer and the second glass layer along the first axis. The plurality of third electrodes are formed between the first insulating layer and the first glass layer along a second axis.