Curved functional film structure and method for producing same

A technology of functional film and curved part, applied in the field of three-dimensional functional film structure and its manufacturing, can solve problems such as undisclosed pressure-sensitive or temperature-sensitive buttons, and achieve the effects of reducing size, high durability, and improving sensitivity

Pending Publication Date: 2021-09-21
约阿内研究有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the prior art does not disclose structures that make pressure-sensitive or temperature-sensitive buttons into three-dimensional shapes

Method used

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  • Curved functional film structure and method for producing same
  • Curved functional film structure and method for producing same

Examples

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example 1

[0189] Sensor buttons with diameters of 10 mm, 15 mm and 20 mm were provided on a thermoplastic deformable film substrate (PMMA film, thickness: 175 μm). The round button is made of a sufficiently transparent material as a sandwich structure with a base electrode layer, a ferroelectric sensor layer, and a cover electrode layer. Electrical contact with the outside is made via a ring conductor path. For the backlight, the LED light source is mounted outside the actual sensing part. LEDs integrated directly next to the sensor section require a very small LED design. These are supplied using pico-LEDs (SMD components) and have very small dimensions (1mm x 0.6mm) and a small thickness of 0.2mm. The sensor button illumination was pre-checked using optical simulations using a commercial ray tracing tool (OpticStudio). Based on simulations, place a sufficient number of pico-LEDs and an equivalent number of series resistors outside the button touch portion.

[0190] The fabrication...

example 2

[0194] This example describes a method for fabricating a backlit pressure- or temperature-sensitive membrane sensor button with a 3D shape (see Figure 2).

[0195] First, a membrane composite is fabricated. The two-dimensional bonding of the functional film (eg PEN) and carrier film (eg ABS) is performed in a roll-to-roll process by wet lamination. In the lamination process, a liquid laminating adhesive is first applied to one of the two films, pre-dried and then the so-coated film is joined to the other film under the influence of pressure and / or temperature superior.

[0196] Then, fabricate the membrane sensor button. The individual layers of the membrane sensor button (sensor interlayer, conductive paths) and decorative ink are applied in a structured manner to a pre-cut membrane using an additional screen printing process including intermediate drying through a mask (screen / stencil) Composite materials (such as PEN / ABS). The printing sequence was as follows: On the prin...

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Abstract

The present invention relates to a functional film structure and to a method for producing same. The functional film structure has a sensor key arranged on a film substrate and can be brought into a three-dimensional shape by thermal shaping processes, such as for example vacuum deep drawing or high-pressure forming. The functional film structure is preferably flexible and has preferably transparent and illuminated regions.

Description

technical field [0001] The invention relates to a three-dimensional functional membrane structure with a sensor unit and a manufacturing method thereof. Background technique [0002] Currently, thin-film surfaces tend to function in the fields of structural electronics, in-mold electronics, and three-dimensional (3D) integrated electronics. The functional film is then molded into a three-dimensional shape or back-molded in a sheet-in-mold injection molding process (FIM) for mechanical stability. An example of this is the European project TERASEL1, in which several FIM demonstrators were provided, such as 3D integrated LEDs on a 3D plastic cover or a board with grooves based on the uniform lighting of the integrated LEDs. There is also a back-mode LED display or light-emitting flexible wristband on the market, where the LEDs are first placed on a stretchable substrate using a pick-and-place method, and then slightly deformed. Overmolding and stabilization are then performed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K37/06H03K17/96B29C51/08B29C51/14H05K1/02H05K1/18H05K3/00
CPCH03K17/962B29C51/08B29C51/14B29L2031/3406B29L2031/3443H05K3/0014H05K1/0284H03K2217/960755H05K2201/10151H05K2201/10106H05K1/181H05K3/1216H05K2203/1105H05K1/16B29C45/14639G01K7/16G01L9/0041H05K1/18H05K3/0011H05K3/305
Inventor B·斯达洛博M·贝勒格莱提斯V·施密特M·瑞尔克G·舍佩尔S·崔斯尔A·施万德纳F·帕丁格尔M·海尔曼D·艾德
Owner 约阿内研究有限责任公司
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