Device and method for detecting position of object and image display system having such device
First Claim
1. An object position detecting device for detecting a position of an object, the object position detecting device comprising:
- a touch film;
a first electrode set disposed under the touch film and including multiple first electrodes that are parallel with each other and run in a first direction, wherein at least one of the first electrodes is subject to a capacitance change when the object approaches the touch film, the first electrodes of the first electrode set are divided into multiple first electrode groups, and each first electrode group includes more than one of the first electrodes that are parallel with and connected with each other;
a second electrode set disposed under the touch film and including multiple second electrodes that are parallel with each other and run in a second direction, wherein at least one of the second electrodes is subject to a capacitance change when the object approaches the touch film, the second electrodes of the second electrode set are divided into multiple second electrode groups, and each second electrode group includes more than one of the second electrodes that are parallel with and connected with each other; and
a sensing and computing circuit sensing first equivalent capacitance values of the first electrode groups and second equivalent capacitance values of the second electrode groups, wherein the sensing and computing circuit comprises;
an electrode switching and controlling module electrically connected to the first electrode set and the second electrode set, successively connecting the first electrodes of the first electrode groups in parallel so as to output the first equivalent capacitance values through a first sensing line, and successively connecting the second electrodes of the second electrode groups in parallel so as to output the second equivalent capacitance values through a second sensing line; and
a computing circuit electrically connected to the first sensing line and the second sensing line, calculating the position information of the object on the touch film according to the first equivalent capacitance values and the second equivalent capacitance values that are respectively outputted through the first sensing line and the second sensing line.
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Accused Products
Abstract
An object position detecting device includes a touch film, a first electrode set, a second electrode set, and a sensing and computing circuit. An object position detecting method includes the following steps. Firstly, an object is provided on the touch film. Then, first equivalent capacitance values of multiple first electrode groups of a first electrode set under the touch film are sensed, wherein each first electrode group includes n adjacent first electrodes that are parallel with and connected with each other. Then, second equivalent capacitance values of multiple second electrode groups of a second electrode set under the touch film are sensed, wherein each second electrode group includes m adjacent second electrodes that are parallel with and connected with each other. According to the first equivalent capacitance values and the second equivalent capacitance values, first position information of the object is calculated.
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Citations
12 Claims
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1. An object position detecting device for detecting a position of an object, the object position detecting device comprising:
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a touch film; a first electrode set disposed under the touch film and including multiple first electrodes that are parallel with each other and run in a first direction, wherein at least one of the first electrodes is subject to a capacitance change when the object approaches the touch film, the first electrodes of the first electrode set are divided into multiple first electrode groups, and each first electrode group includes more than one of the first electrodes that are parallel with and connected with each other; a second electrode set disposed under the touch film and including multiple second electrodes that are parallel with each other and run in a second direction, wherein at least one of the second electrodes is subject to a capacitance change when the object approaches the touch film, the second electrodes of the second electrode set are divided into multiple second electrode groups, and each second electrode group includes more than one of the second electrodes that are parallel with and connected with each other; and a sensing and computing circuit sensing first equivalent capacitance values of the first electrode groups and second equivalent capacitance values of the second electrode groups, wherein the sensing and computing circuit comprises; an electrode switching and controlling module electrically connected to the first electrode set and the second electrode set, successively connecting the first electrodes of the first electrode groups in parallel so as to output the first equivalent capacitance values through a first sensing line, and successively connecting the second electrodes of the second electrode groups in parallel so as to output the second equivalent capacitance values through a second sensing line; and a computing circuit electrically connected to the first sensing line and the second sensing line, calculating the position information of the object on the touch film according to the first equivalent capacitance values and the second equivalent capacitance values that are respectively outputted through the first sensing line and the second sensing line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An object position detecting method for use with an object position detecting device, the object position detecting device including a touch film, a first electrode set and a second electrode set, the object position detecting method comprising steps of:
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sensing first equivalent capacitance values of multiple first electrode groups of a first electrode set under the touch film when an object is provided on the touch film, wherein each first electrode group includes more than one of the first electrodes that are parallel with and connected with each other; sensing second equivalent capacitance values of multiple second electrode groups of a second electrode set under the touch film, wherein each second electrode group includes more than one of the second electrodes that are parallel with and connected with each other; calculating first position information of the object according to the first equivalent capacitance values and the second equivalent capacitance values; sensing third equivalent capacitance values of multiple third electrode groups of the first electrode set under the touch film, wherein each third electrode group includes first electrodes having the same ordinal position of every first electrode group; sensing fourth equivalent capacitance values of multiple fourth electrode groups of the second electrode set under the touch film, wherein each fourth electrode group includes second electrodes having the same ordinal position of every second electrode group; calculating second position information of the object according to the third equivalent capacitance values and the fourth equivalent capacitance values; and calculating third position information of the object according to the first position information and the second position information. - View Dependent Claims (11, 12)
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Specification