Conductive Layer Overlap Prevents Water Droplet Ghosting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Sensor-equipped display devices with In-cell type configurations often malfunction when a water droplet is present, leading to incorrect touch detection due to false determination of the droplet as a touch object.
Innovation Solution
A display device design that includes a conductive layer between the translucent cover member and the semiconductor device, with at least a part of the conductive layer overlapping the semiconductor device, to prevent ghosting and ensure accurate touch detection by suppressing capacitance interference from water droplets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a water droplet is attached to the cover glass, then the touch sensor detects the droplet as a touch object, but this causes wrong determination and ghost formation
Solution Approach 1:
A conductive layer is introduced as an intermediary between the cover glass and the touch sensor. This conductive layer is positioned to overlap with the semiconductor device and serves as a mediator to manage the electrical field, preventing water droplets from directly interfering with the touch sensor's detection capability.
Solution Approach 2:
The conductive layer is positioned in advance to counteract the harmful effect of water droplets before they can cause wrong determination. By having the conductive layer already in place overlapping the semiconductor device, the system preemptively neutralizes the interference that water droplets would otherwise cause to the touch detection accuracy.
2Reliability
If the conductive layer is positioned to overlap with the semiconductor device, then capacitance interference from water droplets is suppressed, but this requires additional structural components
Solution Approach 1:
The conductive layer serves multiple functions: it acts as a shield against water droplet interference, manages electrical fields, and maintains touch detection accuracy. By making this single component multi-functional, the patent reduces the need for additional separate structures to address each issue independently.
Solution Approach 2:
The conductive layer is merged with the existing cover glass structure, positioning it between the cover glass and the semiconductor device. This integration approach combines the protective function against water droplets with the existing display structure, avoiding the need for completely separate additional components.
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 effectively prevents touch panel malfunctions and ensures correct touch detection even when a water droplet is attached, maintaining the accuracy of proximity object detection.
Implementation Method 1
A display device includes a display panel having a semiconductor device disposed at an end portion of an array substrate, and a translucent cover member covering the display panel. The display panel includes a plurality of drive electrodes that detect an external proximity object, and a conductive layer between the translucent cover member and the semiconductor device.
Data Source
AI summary
An object of the present disclosure is to provide a display device that enables the prevention of forming a ghost even though a water droplet is attached. A display device includes a display panel having a semiconductor device disposed at an end portion of an array substrate, and a translucent cover member covering the display panel. The display panel includes a plurality of drive electrodes that detect an external proximity object, and a conductive layer between the translucent cover member and the semiconductor device. At least a part of the conductive layer overlaps with at least a part of the semiconductor device in a planar view.