Display Device Input Sensing Part with Segmented Electrodes
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Solution Overview
Problem
Current display devices face challenges in accurately sensing inputs from touch pens, leading to reduced reliability and precision in touch-based interactions.
Innovation Solution
The implementation of a display device with an input sensing part that includes a combination of main and sub-electrodes, along with switches, which selectively connect transmission and receiving lines to improve signal transmission and reduce noise, allowing for more accurate coordinate calculation of touch pen positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the uplink signal is transmitted through the main electrodes, then the signal transmission path is established, but noise occurs in the display panel
Solution Approach 1:
The electrode system is divided into main electrodes and sub-electrodes with distinct functions. Main electrodes are dedicated to sensing touch inputs, while sub-electrodes are specifically assigned to transmit uplink signals. This segmentation separates the sensing function from the signal transmission function, preventing noise from affecting touch sensing accuracy.
Solution Approach 2:
Sub-electrodes act as intermediary elements that carry uplink signals between the controller and the display panel. By using sub-electrodes as mediators for signal transmission rather than main electrodes, the patent isolates the sensing electrodes from noise-generating signal transmission, thereby improving sensing reliability.
2Measurement precision
If only main electrodes are used for sensing, then the electrode structure is simple, but the coordinate accuracy of touch pen is insufficient
Solution Approach 1:
The electrode system is segmented into main electrodes for sensing and sub-electrodes for signal transmission. This segmentation enables the use of multiple electrodes for coordinate calculation without significantly increasing overall structural complexity, as each electrode type has a dedicated function.
Solution Approach 2:
The sub-electrodes serve multiple purposes: they transmit uplink signals and also participate in coordinate calculation for touch pen positioning. This multi-functionality improves measurement precision without requiring completely separate electrode systems for each function.
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 enhances the sensing reliability and accuracy of touch pen inputs by minimizing noise and improving coordinate calculation, thereby improving the overall input sensing performance.
Implementation Method 1
a first group of switches selectively connecting a transmission line and one of the first main electrode and the first sub-electrode with each other, and a second group of switches selectively connecting a receiving line and one of the second main electrode and the second sub-electrode with each other
Implementation Method 2
the second main electrode overlapping the first main electrode and the first sub-electrode, a second sub-electrode extending lengthwise in the second direction, disposed adjacent to the second main electrode, and insulated from the first main electrode and the first sub-electrode, the second sub-electrode overlapping the first main electrode and the first sub-electrode
Data Source
AI summary
A display device includes a display panel, and an input sensing part disposed on the display panel. The input sensing part includes a first main electrode, a first sub-electrode adjacent to the first main electrode, a second main electrode and insulated from the first main electrode and the first sub-electrode, the second main electrode overlapping the first main electrode and the first sub-electrode, a second sub-electrode adjacent to the second main electrode, and insulated from the first main electrode and the first sub-electrode, the second sub-electrode overlapping the first main electrode and the first sub-electrode, a first group of switches selectively connecting a transmission line and one of the first main electrode and the first sub-electrode with each other, and a second group of switches selectively connecting a receiving line and one of the second main electrode and the second sub-electrode with each other.