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Single-touch or multi-touch capable touch screens or touch pads comprising an array of pressure sensors and production of such sensors

A pressure sensor, touch screen technology, applied in the field of touch screen or touch pad, can solve the problems of non-flexibility and inability to detect

Inactive Publication Date: 2010-09-15
安德烈亚斯‧施泰因豪泽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods cannot be used to detect more than one finger or stylus
Also, the surface may not be flexible and must be reinforced against bending if necessary, otherwise the interpolation cannot be performed with sufficient accuracy

Method used

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  • Single-touch or multi-touch capable touch screens or touch pads comprising an array of pressure sensors and production of such sensors
  • Single-touch or multi-touch capable touch screens or touch pads comprising an array of pressure sensors and production of such sensors
  • Single-touch or multi-touch capable touch screens or touch pads comprising an array of pressure sensors and production of such sensors

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Experimental program
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Embodiment Construction

[0028] Each of the above-mentioned figures will be explained in detail below.

[0029] Figure A A see-through layered construction of the invention is shown with a sensor layer and a display layer.

[0030] If a finger or other object (F1) touches the display or surface (4), this pressure is variably transmitted to the underlying sensor (R1 and R2 in Figure B-B(1)) according to the law of levers. By applying the law of leverage, the paths L1 and L2 and thus the position of the finger on the surface can be determined unambiguously for all sensors (even when only three pressure sensors are used), but in this way the second touch cannot be distinguished.

[0031] However, since otherwise the display or surface is slightly elastic, the surface deforms easily and easily at the point of contact (Fig. B-B(2)). This deformation results in heavier loading of the sensors closer to the contact and lighter loading of those farther away than would otherwise be expected from the law of le...

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PUM

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Abstract

A multi-touch capable touch screen or touchpad is implemented in that a large number of pressure sensors are attached below a flexible surface and both the pressure distribution and also the deformation of the surface are measured. Local pressure maxima arise due to the flexibility of the surface material with the attendant deformation upon contact. Because multiple local pressure maxima may exist, multiple contacts may thus also be recognized simultaneously. The force with which pressure is applied may additionally be ascertained from the pressure strength and the pressure distribution, so that this information may likewise be used in the user interface. Such sensors may be produced very efficiently and cost-effectively in that an ink, which changes the resistance thereof under pressure, is imprinted on printed conductors implemented as the sensor surfaces. Likewise, the printed conductors and the sensor surfaces may also be printed using an ink having the lowest possible resistance.

Description

technical field [0001] The invention relates to a touch screen or touch pad for determining the position of a contact. Background technique [0002] There are currently several methods of interacting with a machine or computer, such as mice, keyboards, touch screens, touch pads, and various sensors. [0003] Touch screen technology, in particular, is becoming more and more popular because direct interaction with the device can occur via the screen with immediate feedback. Additionally, for mobile devices (specifically), space savings are appropriate because a combined display and touch interface takes up less space than a display plus, for example, a keyboard. However, flat touchpads (ie, touch-sensitive surfaces) are now the most common replacement for mice (eg, for notebooks). [0004] With the invention called multi-touch capable touch device (touch screen or touch pad) by means of which more than one finger or stylus or other objects can be detected, completely new int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/0414G06F3/044G01L1/205G06F3/045G06F3/04144
Inventor 安德烈亚斯·施泰因豪泽米洛施·梅里亚克
Owner 安德烈亚斯‧施泰因豪泽
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