System and method for detecting the actuation of a function in the form of a pre-determined path on a touch-sensitive surface of an object
A predetermined path, predetermined function technology, applied in the direction of character and pattern recognition, input/output process of data processing, instruments, etc.
Inactive Publication Date: 2015-07-15
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
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Problems solved by technology
However, the same problem for the same reason still presents here when detecting a dynamic actuation of a predetermined path on a touch-sensitive surface
Method used
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[0044] figure 1A system 10 for detecting the activation of a function in the form of a predetermined path on a touch-sensitive surface of an object, shown in , comprises data processing means, such as a microcomputer 12 including, inter alia, a display 14 and a keyboard 16, and is connected via a wired or radio connection 20 An interactive tablet type object 18 connected to a microcomputer 12 .
[0045] Interactive tablet 18 includes a frame 22 and a touch-sensitive surface 24 supported by the frame on at least a portion of its edges. The touch-sensitive surface 24 takes the form of, for example, a metal, glass or plastic panel that vibrates when elastic mechanical or bulk acoustic waves propagate through its thickness. It can be rectangular, especially 4 / 3 format. In a particular form, it may have a length of 100 mm and a width of 75 mm, a thickness relatively small relative to its length and width, in particular between 100 μm and 4 mm, such as 450 μm. This thickness is a...
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The invention relates to a system (10, 30) for detecting the actuation of a pre-determined function, said actuation being executed by touching a pre-determined path (T) associated with the function on a touch-sensitive surface (24) of an object. The system comprises: at least two different sources (E1, E2) for emitting bulk acoustic waves in the touch-sensitive surface (24), disposed such as to generate acoustic interferences between the emitted waves; at least one receiver (R+, R-) for receiving bulk acoustic waves after they have been propagated and received interference in the touch-sensitive surface (24), designed to form a reception signal from the received acoustic waves; and means (M) for storing a plurality of reference spectral signatures associated with the pre-determined path (T), each of the spectral signatures being associated with a location of a touch on the pre-determined path. The system comprises means (46, 48, 50) for detecting the actuation of the pre-determined function by comparing at least one spectral signature (S1, ..., Sn) of the reception signal to a spectral envelope, known as the reference spectral envelope, of the plurality of reference spectral signatures associated with the pre-determined path (T).
Description
technical field [0001] The invention relates to a system for detecting the activation of a function in the form of a predetermined path on a touch-sensitive surface of an object. The invention also relates to the method used by this system. Background technique [0002] The prior art includes various systems for detecting and localizing a touch on a touch-sensitive surface, including means for emitting bulk acoustic waves at the touch-sensitive surface, means for receiving propagated bulk acoustic waves in the touch-sensitive surface, A receiving signal is designed to provide a received signal based on the received sound waves, and means for detecting and locating a contact on a touch-sensitive surface based on the received signal. Detecting the activation of a function in the form of a predetermined path on the touch-sensitive surface consists in detecting and locating a plurality of successive touches along this path. [0003] Patent US 6,741,237 describes a system utili...
Claims
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IPC IPC(8): G06F3/041G06F3/043
CPCG06F3/0436G06F3/043G06F2203/04104G06F3/0416G06F3/0433G06F18/22
Inventor G·查卢柏特J-P·尼科洛夫斯基N·古恩纳德O·博劳德J-P·亚历山大
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES