Surface wave touch screen
First Claim
Patent Images
1. A surface wave touch screen comprising:
- a hydrophobic panel capable of propagating surface acoustic waves wherein a touch on the panel causes a perturbation of a surface wave propagating through the region of the touch, the hydrophobic panel allowing viewing of displayed images;
transmitter and receiver means coupled to the panel for transmitting and receiving surface acoustic waves on the panel; and
control means for determining the location of a touch on the panel, the controller detecting a user selection of a function associated with a displayed image upon detection of a touch of the panel in a location associated with the image.
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Abstract
A surface wave touch screen) comprising a hydrophobic touch panel capable of propagating surface acoustic waves, wherein a touch on the touch panel causes a perturbation of a surface wave propagating through the region of the touch. Surface wave transducer means are coupled to the touch panel for transmitting and receiving surface acoustic waves on the panel and processing means are capable of determining the position of a touch on the panel. Use of a hydrophobic panel is advantageous in that operation of the touch screen is unaffected by moisture and so can be used in external environments.
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Citations
20 Claims
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1. A surface wave touch screen comprising:
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a hydrophobic panel capable of propagating surface acoustic waves wherein a touch on the panel causes a perturbation of a surface wave propagating through the region of the touch, the hydrophobic panel allowing viewing of displayed images;
transmitter and receiver means coupled to the panel for transmitting and receiving surface acoustic waves on the panel; and
control means for determining the location of a touch on the panel, the controller detecting a user selection of a function associated with a displayed image upon detection of a touch of the panel in a location associated with the image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An automated teller machine (ATM) comprising:
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a display;
a hydrophobic panel through which the display can be viewed, the hydrophobic panel being capable of propagating surface acoustic waves wherein a touch on the panel causes a perturbation of a surface wave propagating through the region of the touch;
a transmitter coupled to the panel for transmitting surface acoustic waves on the panel;
a receiver coupled to the panel for receiving surface acoustic waves on the panel; and
a controller for determining the location of a touch on the panel, the controller noting a user selection of a function associated with a displayed image upon detection of a touch of the panel in a location associated with the image. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification