Blocking Part Shielding Sensing Wirings in Display Devices
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Solution Overview
Problem
The electric field generated between an input device and sensing wirings in display devices can distort signals transmitted through the sensing wirings, affecting the reliability of touch sensing in display devices.
Innovation Solution
Incorporating a blocking part with a shielding layer and mesh pattern over the sensing wirings to prevent the electric field from forming between the input device and sensing wirings, ensuring that the signals remain undistorted and improving sensing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing wirings are exposed without coverage, then signal transmission is maintained, but electric field distortion occurs between input device and sensing wirings
Solution Approach 1:
A blocking part is introduced as an intermediary element between the input device and the sensing wirings. This blocking part includes a blocking electrode that is electrically connected to a reference potential, acting as a shield to prevent harmful electric field interactions while allowing the sensing function to operate reliably
2Reliability
If a blocking part is added to cover sensing wirings, then signal distortion is prevented, but device structure becomes more complex
Solution Approach 1:
The blocking part is integrated with the existing sensing electrode structure. The blocking electrode is formed in the same layer as the sensing electrodes and is electrically connected to the reference potential through the same reference potential electrode, merging the blocking function with the existing sensing architecture to minimize structural complexity
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 implementation of a blocking part with a shielding layer and mesh pattern effectively prevents signal distortion, enhancing the reliability of touch sensing in display devices by blocking static electricity and reducing parasitic capacitance, thereby improving the accuracy and consistency of touch coordinates detection.
Implementation Method 1
an electric field between an input device (e.g., a sensing pen) and sensing wirings in the input sensor can distort signals transmitted through the sensing wirings
Implementation Method 2
The implementation of a blocking part with a shielding layer and mesh pattern effectively prevents signal distortion, enhancing the reliability of touch sensing in display devices by blocking static electricity and reducing parasitic capacitance
Data Source
AI summary
A display device includes: a display panel; and an input sensor disposed on the display panel, wherein the input sensor includes: a plurality of sensing electrodes; a plurality of sensing wirings electrically connected to the plurality of sensing electrodes, respectively; and a conductive part covering the plurality of sensing wirings, wherein the conductive part is configured to be floated or to receive a substantially constant voltage, and wherein the conductive part has a single, contiguous shape.