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Foam tape for force-sensitive touch sensor

A technology of touch sensors and foam tapes, applied in the field of foam tapes, can solve the problems of difficult force-sensitive touch sensor applications, damage to support members, increased volume, etc., to maintain and enhance touch performance, enhance sensing performance, and high durability Effect

Inactive Publication Date: 2019-07-19
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, a rigid support member such as a cover for supporting the upper base material and the lower base material is required to maintain the air gap, and the volume may increase due to the existence of such a support member, and it is also difficult to place the force-sensitive touch Problems of Sensors Applied to Flexible Devices, etc.
[0008] In addition, support members etc. may be damaged by external impact etc. during use, and it is difficult to maintain the air gap constantly and ensure durability
It also has the disadvantage of degraded sensing performance when detecting the position and intensity of pressing force

Method used

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  • Foam tape for force-sensitive touch sensor
  • Foam tape for force-sensitive touch sensor
  • Foam tape for force-sensitive touch sensor

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0091] A foam tape with a total thickness of 155 μm comprising the sum of a silicone foam and a copper layer (ground plane) with a thickness of 150 μm and a PET film (support layer) with a thickness of 5 μm was produced.

[0092] refer to Figure 6C , it can be seen that in the case of silicone foam, the displacement is maintained almost constantly when a constant load is applied.

[0093] refer to Figures 7A to 7C , the difference between Example 2 and Comparative Example 4 and Comparative Example 5 can be more clearly identified. In particular, the difference between Example 2 and Comparative Example 4 and Comparative Example 5 was significant when lower pressures of 0.3 kg and 0.5 kg were applied.

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Abstract

A foam tape for a force-sensitive touch sensor includes a first adhesion layer, a support layer arranged on the first adhesion layer, a foam layer arranged on the support layer and including closed cell bubbles, and a second adhesion layer arranged on the foam layer. At least a portion of some of the closed cell bubbles protrudes from a surface of the foam layer.

Description

technical field [0001] The present disclosure relates to a foam tape for a force-sensitive touch sensor, and more particularly, to a foam tape used in a touch sensor for detecting the strength of a pressing force and an operating position. Background technique [0002] In recent years, a touch input technology for selecting or inputting a user's desired function by contacting with an input device such as a finger, a stylus, etc., has been applied to various electronic products such as mobile phones, laptop computers, personal digital assistants (PADs), )Wait. [0003] An electronic product employing a related art touch input technology may include a plurality of sensing electrodes to detect x-axis and y-axis detection signals, and may detect only a position touched by an input device. That is, the related art touch input technology has a limitation of only sensing and detecting contact position information. [0004] Therefore, since the related art touch input technology c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29
CPCC09J7/29C09J2483/006C09J2400/243C09J2467/006G06F3/0412G06F3/0414B32B5/18B32B27/065B32B2266/06B32B2266/08B32B2457/208B32B2405/00C09J7/20C09J7/38C09J7/25G06F3/0416C09J2483/00C09J2203/318
Inventor 孔志雄
Owner 3M INNOVATIVE PROPERTIES CO