Active Pen Sensor Panel with Solid and Mesh Electrodes
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Solution Overview
Problem
Existing sensor panel configurations in electronic equipment fail to adequately reduce the bezel width, despite advancements in bezel reduction techniques.
Innovation Solution
The sensor panel is designed with a combination of solid and transparent conductors, where outside electrodes are solid and non-transparent, allowing for a significant reduction in their width, while inside electrodes are mesh or transparent, enabling further bezel reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the width of outside electrodes is reduced to decrease the area outside the active area, then the bezel width can be reduced, but the detection precision may be affected
Solution Approach 1:
The patent applies different conductor types to different electrode positions: solid conductors for outside electrodes and mesh conductors for inside electrodes. This local differentiation allows outside electrodes to have reduced width while maintaining adequate detection capability through the solid conductor structure, resolving the contradiction between minimizing bezel area and preserving detection precision.
2Length of moving object
If solid conductors are used for outside electrodes, then the width can be significantly reduced, but the transparency is lost
Solution Approach 1:
The patent strategically places solid conductors only at outside electrode positions where light transmission is less critical, while using mesh conductors for inside electrodes in the active display area where transparency is essential. This spatial differentiation of conductor types resolves the contradiction between minimizing electrode width and maintaining light transmission.
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 allows for a substantial decrease in the area outside the active area, resulting in a more compact bezel width in electronic equipment.
Implementation Method 1
The active pen is a stylus that includes a power supply part and a signal processing circuit and is configured to be capable of transmitting a pen signal by supplying a charge according to a signal generated by the signal processing circuit to an electrode (pen electrode) disposed near a pen tip. At the time of detection of the active pen, the pen signal is received by the linear electrode that exists near the pen tip in the multiple linear electrodes in the sensor panel
Data Source
AI summary
Disclosed herein is a sensor panel which overlaps a display device and is connected to an integrated circuit that detects a position of an active pen at least in an active area of the display device, the sensor panel including a plurality of first electrodes that each extend in a first direction and are juxtaposed in a second direction different from the first direction, the plurality of first electrodes being connected to the integrated circuit by first routing lines different from each other, in which the plurality of first electrodes includes first and second outside electrodes located at respective ends the plurality of first electrodes in the second direction, and a plurality of first inside electrodes that are different from the first and second outside electrodes, each of the first and second outside electrodes is a solid conductor, and each the plurality of first inside electrodes is a mesh conductor.