Electromagnetic-type touch panel, method for driving and detecting electromagnetic-type touch panel, and coordinate input device
First Claim
1. An electromagnetic-type touch panel, configured to detect a touch position of an electromagnetic stylus, the electromagnetic stylus comprising:
- a first resonance circuit and a second resonance circuit; and
the electromagnetic-type touch panel comprising;
a plurality of first coils extending in a first direction and a plurality of second coils extending in a second direction,wherein each of the plurality of first coils is configured to emit a first electromagnetic signal having a first frequency,wherein each of the plurality of second coils is configured to emit a second electromagnetic signal having a second frequency different from the first frequency,wherein the first resonance circuit of the electromagnetic stylus is configured to receive the first electromagnetic signal and reflect a first reflected signal having the first frequency,wherein the second resonance circuit of the electromagnetic stylus is configured to receive the second electromagnetic signal and reflect a second reflected signal having the second frequency, andwherein the plurality of first coils are configured to receive the second reflected signal, and the plurality of second coils are configured to receive the first reflected signal.
1 Assignment
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Accused Products
Abstract
A touch panel is disclosed. The touch panel is detects a position of a stylus, which includes first and second resonance circuits. The touch panel includes first and second coils respectively extending in first and second directions. Each of the first coils emits a first signal having a first frequency and receives a second signal having a second frequency, where emitting the first signal and receiving the second signal are successively and respectively performed by the plurality of second coils. In addition, each of second coils emits a second signal having the second frequency and receives a first signal having the first frequency, where emitting the second signal and receiving the first signal are successively performed. The first resonance circuit of the stylus generates the first signal after receiving the first signal, and the second resonance circuit of the electromagnetic stylus generates the second signal after receiving the second signal.
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Citations
20 Claims
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1. An electromagnetic-type touch panel, configured to detect a touch position of an electromagnetic stylus, the electromagnetic stylus comprising:
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a first resonance circuit and a second resonance circuit; and the electromagnetic-type touch panel comprising; a plurality of first coils extending in a first direction and a plurality of second coils extending in a second direction, wherein each of the plurality of first coils is configured to emit a first electromagnetic signal having a first frequency, wherein each of the plurality of second coils is configured to emit a second electromagnetic signal having a second frequency different from the first frequency, wherein the first resonance circuit of the electromagnetic stylus is configured to receive the first electromagnetic signal and reflect a first reflected signal having the first frequency, wherein the second resonance circuit of the electromagnetic stylus is configured to receive the second electromagnetic signal and reflect a second reflected signal having the second frequency, and wherein the plurality of first coils are configured to receive the second reflected signal, and the plurality of second coils are configured to receive the first reflected signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A coordinate input device, comprising:
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an electromagnetic-type touch panel including a plurality of first coils extending in a first direction and a plurality of second coils extending in a second direction; and an electromagnetic stylus including a first resonance circuit and a second resonance circuit, wherein the electromagnetic-type touch panel is configured to detect a touch position of the electromagnetic stylus, wherein each of the plurality of first coils is configured to emit a first electromagnetic signal having a first frequency, wherein each of the plurality of second coils is configured to emit a second electromagnetic signal having a second frequency different from the first frequency, wherein the first resonance circuit of the electromagnetic stylus is configured to receive the first electromagnetic signal and reflect a first reflected signal having the first frequency, wherein the second resonance circuit of the electromagnetic stylus is configured to receive the second electromagnetic signal and reflect a second reflected signal having the second frequency, and wherein the plurality of first coils are configured to receive the second reflected signal, and the plurality of second coils are configured to receive the first reflected signal.
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12. A method of driving and detecting an electromagnetic-type touch panel, configured to detect a touch position of an electromagnetic stylus, wherein the method comprises:
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successively applying a first driving signal to and detecting first induced signals from a plurality of first coils extending in a first direction in the electromagnetic-type touch panel; and successively applying a second driving signal to and detecting second induced signals from a plurality of second coils extending in a second direction in the electromagnetic-type touch panel, wherein each of the first coils is configured to emit a first electromagnetic signal having a first frequency, wherein each of the plurality of second coils is configured to emit a second electromagnetic signal having a second frequency different from the first frequency, wherein the first resonance circuit of the electromagnetic stylus is configured to receive the first electromagnetic signal and reflect a first reflected signal having the first frequency, wherein the second resonance circuit of the electromagnetic stylus is configured to receive the second electromagnetic signal and reflect a second reflected signal having the second frequency, and wherein the plurality of first coils are configured to receive the reflected second signal, and the plurality of second coils are configured to receive the reflected first signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification