COORDINATE INDICATING APPARATUS AND METHOD FOR DRIVING THEREOF
First Claim
1. A coordinate indicating apparatus, comprising:
- a channel electrode which includes a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction perpendicular to the first direction, and which has capacitance between the first plurality of electrodes and the second plurality of electrodes, the capacitance being changed by an approaching contact object;
a driver configured to apply driving signals to the first plurality of electrodes simultaneously;
a receiver configured to receive response signals from the second plurality of electrodes; and
a controller configured to determine a location of the contact object based on the driving signals transmitted to the first plurality of electrodes and the response signals received from the second plurality of electrodes,wherein the driver is configured to simultaneously apply, to the first plurality of electrodes, continuous driving signals according to a matrix corresponding to a Hadamard matrix, and wherein the driving signals exclude a time section.
1 Assignment
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Accused Products
Abstract
A coordinate indicating apparatus includes a channel electrode which includes a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction perpendicular to the first direction, and which has capacitance between the first plurality of electrodes and the second plurality of electrodes, the capacitance being changed by an approaching contact object; a driver configured to apply driving signals to the first plurality of electrodes simultaneously; a receiver configured to receive response signals from the second plurality of electrodes; and a controller configured to determine a location of the contact object based on the driving signals transmitted to the first plurality of electrodes and the response signals received from the second plurality of electrodes, wherein the driver is configured to simultaneously apply, to the first plurality of electrodes, continuous driving signals according to a matrix corresponding to a Hadamard matrix, and wherein the driving signals exclude a time section.
8 Citations
24 Claims
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1. A coordinate indicating apparatus, comprising:
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a channel electrode which includes a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction perpendicular to the first direction, and which has capacitance between the first plurality of electrodes and the second plurality of electrodes, the capacitance being changed by an approaching contact object; a driver configured to apply driving signals to the first plurality of electrodes simultaneously; a receiver configured to receive response signals from the second plurality of electrodes; and a controller configured to determine a location of the contact object based on the driving signals transmitted to the first plurality of electrodes and the response signals received from the second plurality of electrodes, wherein the driver is configured to simultaneously apply, to the first plurality of electrodes, continuous driving signals according to a matrix corresponding to a Hadamard matrix, and wherein the driving signals exclude a time section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A coordinate indicating apparatus, comprising:
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a channel electrode which includes a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction perpendicular to the first direction, and which has capacitance between the first plurality of electrodes and the second plurality of electrodes, the capacitance being changed by a contact object; a driver configured to apply continuous driving signals corresponding to a Hadamard matrix to the first plurality of electrodes simultaneously; a receiver configured to receive response signals from the plurality of second electrodes; and a controller configured to determine a location of the contact object based on the driving signals transmitted to the first electrodes and the response signals received from the second electrodes, wherein the controller is configured to determine the location of the contact object using only response signals generated in response to driving signals excluding a time section where the driving signals applied to the electrodes have a same value in the Hadamard matrices. - View Dependent Claims (14)
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15. A coordinate indicating apparatus, comprising:
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a channel electrode which includes a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction perpendicular to the first direction, and which has capacitance between the first plurality of electrodes and the second plurality of electrodes changed by a contact object; a driver configured to apply continuous driving signals including a first value and a second value different from the first value, to the first plurality of electrodes simultaneously; a receiver configured to receive response signals from the second plurality of electrodes; and a controller configured to determine a location of the contact object based on the driving signals transmitted to the first plurality of electrodes and the response signals received from the second plurality of electrodes, wherein the driver is configured to generate, as driving signals, a first plurality of pulse signals, the first plurality of pulse signals starting with a rising edge and ending with a falling edge according to the first value, and generate, as driving signals, a second plurality of pulse signals, the second plurality of pulse signals starting with a falling edge and ending with a rising edge according to the second value. - View Dependent Claims (16, 17)
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18. A coordinate indicating apparatus, comprising:
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a channel electrode which comprises a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction perpendicular to the first direction, and which has capacitance between the first plurality of electrodes and the second plurality of electrodes changed by a contact object; a driver configured to apply driving signals to the first plurality of electrodes simultaneously; a receiver configured to receive response signals from the second plurality of electrodes; and a controller configured to determine a location of the contact object based on the driving signals transmitted to the first plurality of electrodes and the response signals received from the second plurality of electrodes, wherein the receiver is configured to accumulate the response signals as a first plurality of response signals in a first direction of a first capacitor, and accumulate the response signals as a second plurality of response signals in a second direction of the first capacitor. - View Dependent Claims (19, 20, 21)
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22. A control method of a coordinate indicating apparatus, comprising:
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applying driving signals to a first plurality of electrodes arranged in a first direction simultaneously; receiving response signals from a second plurality of electrodes arranged in a second direction perpendicular to the first direction; and determining a location of a contact object based on the driving signals transmitted to the first plurality of electrodes and the response signals received from the second plurality of electrodes, wherein the applying comprises simultaneously applying to the first plurality of electrodes, continuous driving signals corresponding to a Hadamard matrix excluding a time section. - View Dependent Claims (23)
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24. A coordinate indicating apparatus, comprising:
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a channel electrode which includes a first plurality of electrodes arranged in a first direction, and a second plurality of electrodes arranged in a second direction perpendicular to the first direction, wherein a capacitance between the first plurality of electrodes and the second plurality of electrodes is changed by a location of a contact object; a driver configured to apply driving signals to the plurality of first electrodes simultaneously; a receiver configured to receive response signals from the second plurality of electrodes; and a controller configured to determine the location of the contact object based on the driving signals transmitted to the first electrodes and the response signals received from the second electrodes, wherein the driving signals are applied according to a matrix, the matrix corresponding to a Hadamard matrix having a plurality of elements arranged in at least a first column, in which all of the elements of the first column of the Hadamard matrix are replaced with a value of zero.
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Specification