Input system and input device

• US 7,499,020 B2
• Filed: 04/20/2001
• Issued: 03/03/2009
• Est. Priority Date: 11/14/2000
• Status: Expired due to Fees

• Current Assignee: Fujitsu Takamisawa Component Limited
• Original Assignee: Fujitsu Takamisawa Component Limited
• Inventors: Sasaki, Shinobu, Endo, Masaya, Kurashima, Shigemi, Yanagi, Masahiro, Endo, Norio
• Primary Examiner(s): Hjerpe; Richard
• Assistant Examiner(s): NGUYEN, KIMNHUNG T
• Application Number:
  US09/838,170
• Publication Number:
  US 20020057254A1
• Time in Patent Office: 2,874 Days
• Field of Search: 345156-158, 345/163, 345/161, 345/166, 369/44, 369/23, 340/573.4, 455/67.13, 455/69, 455/115.3, 455/277.1
• US Class Current: 345/156
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry

Abstract

An input system includes an information generation part which generates input information based on a given input operation, a transmission part which transmits signals generated by having a plurality of different carrier frequencies modulated with the input information, and a reception part which receives the transmitted signals and demodulates the signals into the input information.

Claims

1. An input system, comprising:

an information generation part generating input information based on a given input operation;

a transmission part generating a signal by having a carrier frequency modulated with the input information, and transmitting the generated signal;

a plurality of wave direction parts provided close to said transmission part so as to provide the signal transmitted from said transmission part with directivity; and

a reception part receiving the transmitted signal through each of the wave direction parts and demodulating the received signals into the same input information,

wherein the signal transmitted at a timing from the transmission part is provided alternately to the wave direction parts so that the same input information is transmitted alternately through the wave direction parts.

2. The input system as claimed in claim 1, further comprising:

a switching part switchable between said wave direction parts based on a control signal supplied from said information generation part so that each of the signals transmitted from the transmission part is supplied to a corresponding one of the wave direction parts.

3. The input system as claimed in claim 1, wherein said transmission part comprises a plurality of transmission circuits for transmitting the signal.

4. The input system as claimed in claim 1, wherein said wave direction parts are antennas.

5. An input device, comprising:

an information generation part generating input information based on a given input operation;

a transmission part generating a signal by having a carrier frequency modulated with the input information, and transmitting the generated signal; and

a plurality of wave direction parts provided close to said transmission part so as to provide the signal transmitted from said transmission part with directivity,

wherein the signal transmitted at a timing from the transmission part is provided alternately to the wave direction parts so that the same input information is transmitted alternately through the wave direction parts.

6. The input device as claimed in claim 5, further comprising:

a switching part switchable between said wave direction parts based on a control signal supplied from said information generation part so that each of the signals transmitted from the transmission part is supplied to a corresponding one of the wave direction parts.

7. The input device as claimed in claim 5, wherein said transmission part comprises a plurality of transmission circuits transmitting the signal, the transmission circuits corresponding to the wave direction parts.

8. The input device as claimed in claim 5, wherein said wave direction parts are antennas.