Capacitive Built-in Touch Control Display Panel Common Electrode Integration
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Solution Overview
Problem
Conventional capacitive touch control LCDs require additional touch panels, which are costly, have low yield, and reduce light transmittance due to increased thickness and complexity.
Innovation Solution
A capacitive built-in touch control display panel is implemented, where the array substrate includes a touch control driving electrode and a detecting electrode, both integrated within the existing transparent common electrode layer, allowing for time-divided signal application to enable both display and touch control functions without an additional touch control panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an additional touch control panel is attached to the display panel, then touch control function is achieved, but device complexity increases and light transmittance decreases
Solution Approach 1:
The patent merges the touch control electrodes with the existing transparent common electrode layer in the LCD display panel. The touch control driving electrode and detecting electrode are integrated into the same layer as the common electrode, eliminating the need for a separate touch control panel and reducing overall device complexity while maintaining touch control functionality.
Solution Approach 2:
The transparent common electrode layer serves dual functions: it acts as the common electrode for liquid crystal display operation and as the touch control driving electrode for touch sensing. This multi-functionality eliminates the need for separate components and reduces the number of layers required in the display panel structure.
2Adaptability or versatility
If an additional touch control panel is attached to the display panel, then touch control function is achieved, but light transmittance decreases due to increased thickness
Solution Approach 1:
By combining the touch control electrodes with the existing transparent common electrode layer, the patent eliminates additional layers that would increase thickness and block light. The integrated structure maintains the original thin profile of the display panel, ensuring high light transmittance while providing touch control functionality.
3Adaptability or versatility
If a touch control function unit is attached on the upper polarizer, then touch control is enabled, but manufacturing complexity and cost increase
Solution Approach 1:
The patent integrates touch control electrodes directly into the array substrate's transparent common electrode layer during the standard LCD manufacturing process. This eliminates the need for separate touch control panel fabrication and assembly steps, simplifying manufacturing and reducing costs while enabling touch control functionality.
Solution Approach 2:
The transparent common electrode layer performs both its traditional role in liquid crystal display and its new role as a touch control driving electrode. This multi-functionality allows the existing manufacturing infrastructure to produce touch control displays without requiring separate production lines or additional manufacturing processes.
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 display panel structure, enhances light transmittance, and increases the aperture ratio by utilizing existing electrodes, while maintaining normal image display and enabling accurate touch control without the need for extra components.
Implementation Method 1
an electric field is generated at edges of slit electrodes on a same plane and an electric field is generated between a slit electrode layer and a plate electrode layer so as to form a multi-dimensional electric field, so that liquid crystal molecules at all orientations, which are located directly above the electrodes and between the slit electrodes in a liquid crystal cell, can be rotated
Implementation Method 2
a capacitive built-in touch control display panel, comprising an array substrate, an counter substrate and a liquid crystal layer
Data Source
AI summary
The invention discloses a capacitive built-in touch control display panel, a display device, a control device and method with a purpose of realizing display and touch control functions of the display panel without an additional touch panel, which simplifies the configuration of the capacitive built-in touch control display panel and improves the light transmittance. A capacitive built-in touch control display panel provided by the embodiment of the invention comprises an array substrate, an counter substrate and a liquid crystal layer, wherein the array substrate comprises a gate line and a data line disposed as intersecting each other and a transparent common electrode layer; the array substrate further comprises a touch control driving electrode positioned in the transparent common electrode layer and extending along a first direction, and a touch control detecting electrode insulated from the touch control driving electrode by way of an insulation layer and extending along a second direction; the first direction is perpendicular to the second direction, a common voltage signal and a touch control driving signal are applied to the touch control driving electrode in a time dividing manner.