Capacitive 3D Touch LCD Using Frame Electrode
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Solution Overview
Problem
Current touch display devices with pressure induction and touch control functions require complex structure designs and multiple pressure sensors, leading to limited space resolution and compromised display quality when attempting to induce 3D touch capabilities.
Innovation Solution
A touch control liquid crystal display device with a capacitive touch control structure that includes a driving electrode layer on the array substrate and a first induction electrode layer on the filter substrate, along with a second induction electrode layer on the middle frame facing the backlight module, forming a capacitive induction mechanism to detect pressure signals, allowing for 3D touch functionality without increasing sensor complexity or affecting display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple pressure sensors are added to achieve pressure induction and touch control functions, then the 3D touch capability is improved, but the device structure becomes more complex and manufacturing difficulty increases
Solution Approach 1:
The patent makes the common electrode layer serve dual functions: traditional display function and touch control function. By using the common electrode layer as the driving electrode layer for touch control, the system achieves multi-functionality without adding separate pressure sensors, thus resolving the contradiction between 3D touch capability and structure complexity
Solution Approach 2:
The patent merges the display function and touch control function into a single integrated structure. The common electrode layer is simultaneously used for display and as the driving electrode for touch control, combining multiple functions into one component to reduce structural complexity while maintaining 3D touch capability
2Adaptability or versatility
If multiple pressure sensors are added to achieve pressure induction and touch control functions, then the 3D touch capability is improved, but the manufacturing process becomes more difficult
Solution Approach 1:
The common electrode layer is designed to perform both display and touch control functions. This multi-functionality eliminates the need for separate pressure sensors and their associated manufacturing processes, thereby reducing manufacturing difficulty while achieving 3D touch capability
Solution Approach 2:
The common electrode layer serves itself by simultaneously performing display and touch control functions. This self-service approach eliminates the need for additional specialized components, simplifying the manufacturing process while maintaining full 3D touch functionality
3Adaptability or versatility
If the structure is changed to accommodate pressure sensors for 3D touch, then the pressure induction function is improved, but the display quality is compromised
Solution Approach 1:
The common electrode layer is used for both display and touch control functions. This multi-functionality allows the system to achieve pressure induction without adding separate components that would compromise display quality, as the same layer serves both purposes
Solution Approach 2:
The patent introduces a new dimension to the capacitive structure by placing the second induction electrode layer on the backlight module side, creating a three-layer capacitive structure. This dimensional change enables pressure detection without affecting the display quality of the liquid crystal display
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 enables simple and cost-effective realization of 3D touch functions in liquid crystal display devices by maintaining a gap between the second induction electrode and the backlight module, ensuring deformation space and using transparent conductive ITO for the second induction electrode, thus preserving display quality.
Implementation Method 1
the second induction electrode layer and the driving electrode layer constitute a capacitive induction mechanism to induct a pressure signal applied on the display panel
Data Source
AI summary
A touch control liquid crystal display device, having a display panel and a backlight module disposed opposite each other and a middle frame supporting the panel and module. The panel includes an array and a filter substrate disposed opposite each other and a liquid crystal layer disposed there-between; wherein, a driving electrode layer is disposed on the array substrate, a first induction electrode layer is disposed on the filter substrate, the driving electrode layer and the first induction electrode layer constitute a capacitive touch control structure. Wherein, a second induction electrode layer is disposed on a side of the middle frame facing the module, there is a gap between the second induction electrode layer and the module. The second induction electrode layer and the driving electrode layer constitute a capacitive induction mechanism to induct a pressure signal applied on the panel. An electronic apparatus including the above device is also disclosed.