Sensing device of surface acoustic wave touch panel
AssigneeEgalax_Empia Technology Inc.
InventorsSHANG-TAI YEH, Teng-Wei Hsieh
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Abstract
Described is a sensing device of a surface acoustic wave (SAW) touch panel having a new reflector columns and rows arrangement. As compared to the conventional design in the art where each of the reflector columns and rows are arranged from thinness to thickness, each of the arrangements of the reflector columns and rows herein is composed of a plurality of uniformly disposed reflectors having several sub-reflectors isolated with a gap or gaps.
Claims21
A surface acoustic wave touch panel, comprising:
- a substrate for providing transmission of a surface acoustic wave;
- a reflector array including a plurality of pairs of reflectors, each pair of reflectors determining a path on the substrate, respectively, wherein these reflectors include a plurality of dashed-line reflectors, each dashed-line reflector including a plurality of sub-reflectors spaced apart by at least a gap;
- at least one transmitter for generating a surface acoustic wave;
- and
- at least one receiver for generating a signal based on the surface acoustic wave transmitted by each path, wherein the physical total length of the pair of reflectors that transmit the surface acoustic wave on each path determines the amount of the surface acoustic wave transmitted on the path.
A method for configuring a reflector array of a surface acoustic wave touch panel, comprising:
- providing a substrate for providing transmission of a surface acoustic wave;
- determining the locations of a plurality of pairs of reflectors of the reflector array on the substrate;
- providing the reflector array based on the locations of the plurality of pairs of reflectors of the reflector array on the substrate, each pair of reflectors determining a path on the substrate, respectively, wherein these reflectors include a plurality of dashed-line reflectors, each dashed-line reflector including a plurality of sub-reflectors spaced apart by at least a gap;
- providing at least one transmitter for generating a surface acoustic wave;
- providing at least one receiver for generating a signal based on the surface acoustic wave transmitted by each path, wherein the physical total length of the pair of reflectors that transmit the surface acoustic wave on each path determines the amount of the surface acoustic wave transmitted on the path;
- and
- adjusting the total length of the gap of each dashed-line reflector based on the signal, so that the signal is maintained at a zero-value range during a detection period.
A method for configuring a reflector array of a surface acoustic wave touch panel, comprising:
- providing a substrate for providing transmission of a surface acoustic wave;
- providing the reflector array including a plurality of pairs, each pair of reflectors include a plurality of dashed-line reflectors, each dashed-line reflector including a plurality of sub-reflectors spaced apart by at least a gap;
- providing at least one transmitter for generating a surface acoustic wave;
- providing at least one receiver for generating a signal based on the surface acoustic wave transmitted by each path, wherein the physical total length of the pair of reflectors that transmit the surface acoustic wave on each path determines the amount of the surface acoustic wave transmitted on the path;
- and
- adjusting the locations of these reflectors based on the signal, so that the signal is maintained at a zero-value range during a detection period.
Dependencies are inferred from the claim text.