Touch Screen Panel Integrated Display Device Non-Overlapping Electrode Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In touch screen panel integrated display devices, the detection electrodes often overlap with the gate driving circuit, leading to noise and ghost touch issues due to coupling effects, which degrade touch performance.
Innovation Solution
The detection electrodes and electrode wires are formed without overlapping the gate driving circuit, with specific configurations such as positioning them within the display area and using non-overlapping designs on separate substrates to prevent coupling noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detection electrodes extend into the non-display area to maintain capacitance at the edge of the display area, then touch sensitivity at the edge is improved, but coupling noise with the gate driving circuit increases causing ghost touches
Solution Approach 1:
The non-display area is segmented into a first non-display area (adjacent to the display area) and a second non-display area (farther from the display area). The detection electrodes are configured to extend only into the first non-display area and stop before reaching the second non-display area where the gate driving circuit is located. This segmentation allows the detection electrodes to maintain edge capacitance while preventing coupling noise with the gate driving circuit.
Solution Approach 2:
Different regions of the non-display area are assigned different functions: the first non-display area serves as an extension region for detection electrodes to maintain capacitance, while the second non-display area serves as a protected region for the gate driving circuit. This local differentiation allows each region to optimize its specific function without interfering with the other.
2Object-affected harmful factors
If detection electrodes are positioned within the display area to avoid overlapping the gate driving circuit, then coupling noise is reduced, but the area available for maintaining edge capacitance is limited
Solution Approach 1:
The detection electrodes are extended into the non-display area (a different spatial dimension relative to the display area) to provide additional area for maintaining capacitance. This dimensional extension allows the electrodes to maintain sufficient capacitance without requiring larger area within the display area itself, thereby avoiding overlap with the gate driving circuit.
3Device complexity
If the touch screen panel is integrated directly with the display panel, then device complexity is reduced, but the gate driving circuit and detection electrodes may overlap causing ghost touches
Solution Approach 1:
The non-display area is divided into functional zones: a first non-display area for detection electrode extension and a second non-display area for gate driving circuit placement. This segmentation enables direct integration of the touch screen panel with the display panel while preventing harmful overlap between detection electrodes and gate driving circuit, thus maintaining both integration simplicity and touch reliability.
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 effectively prevents or reduces coupling noise between the detection electrodes and the gate driving circuit, enhancing touch performance by eliminating ghost touches and improving overall input accuracy.
Implementation Method 1
A capacitive touch screen panel includes detection electrodes arranged in an active touch area, and is configured to detect a change in capacitance between the detection electrodes when a hand or an object contacts the touch screen panel.
Implementation Method 2
the gate driving circuit may be configured to output a scan signal to the pixel unit
Data Source
AI summary
A touch screen panel integrated display device includes a first substrate divided into a display area and a non-display area disposed outside the display area, a gate driving circuit positioned in the non-display area of the first substrate, a second substrate facing the first substrate, detection electrodes formed on the second substrate, and electrode wires formed on the second substrate and electrically connected with the detection electrodes. The detection electrodes and the electrode wires are formed without overlapping the gate driving circuit.