Terminal device and communication system

• US 20060267769A1
• Filed: 05/12/2006
• Published: 11/30/2006
• Est. Priority Date: 05/30/2005
• Status: Abandoned Application

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Ito, Masafumi, Izumi, Konami
• Application Number:
  US11/432,348
• Publication Number:
  US 20060267769A1
• Time in Patent Office: Days
• US Class Current: 340/572.100
• CPC Class Codes: G08B 3/1008 Personal calling arrangements or devices, i.e. paging systems selective calling systems and call receivers H04W84/00, H04W68/00

Abstract

One of the objects of the present invention is to provide a communication system in which a user in a specific area can obtain information immediately without operating a device. The communication system has an RFID card, a reader/writer for communication, a host computer, and an information communication means. The RFID card transmits and receives information wirelessly to and from the reader/writer for communication. Thus a user can carry the RFID card freely. The memory portion in the RFID card has a rewritable memory portion and a non-writable memory portion. Electric power required for operation of the RFID card is supplied wirelessly, which contributes to reduction is size and weight of the RFID card. By providing a display portion in the RFID card, information transmitted wirelessly can be displayed on the display portion and the user can recognize information immediately.

Claims

1. A terminal device comprising:

an antenna to transmit and receive a wireless signal;

a high frequency circuit operationally connected to the antenna;

a logic portion to which an output from the high frequency circuit is inputted;

a memory portion to store an output from the logic portion; and

a display portion to which an output from the logic portion is inputted.

3. The terminal device according to claim 1, wherein the memory portion has a rewritable memory portion and a non-rewritable memory portion.

5. The terminal device according to claim 1,

wherein the memory portion has a rewritable memory portion and a non-rewritable memory portion,

wherein the non-rewritable memory portion is capable of storing information in advance, and

wherein the rewritable memory portion is capable of writing and reading information from the wireless signal.

7. The terminal device according to claim 1, wherein the high frequency circuit, the logic portion, the memory portion, and the display portion are formed using a transistor formed over an insulating substrate.

9. The terminal device according to claim 1, wherein electric power needed for operation of circuits of the terminal device is generated by applying wireless communication.

11. The terminal device according to claim 1, further comprises a speaker.

13. The terminal device according to claim 1, wherein the display portion includes a light emitting element or a liquid crystal.

2. A terminal device comprising:

an antenna to transmit and receive a wireless signal;

a high frequency circuit operationally connected to the antenna;

a logic portion to which an output from the high frequency circuit is inputted;

a memory portion to store an output from the logic portion;

a display portion to which an output from the logic portion is inputted; and

an optical sensor for detecting an amount of external light and controlling a brightness of the display portion according to the amount of external light which is detected.

4. The terminal device according to claim 2, wherein the memory portion has a rewritable memory portion and a non-rewritable memory portion.

6. The terminal device according to claim 2,

wherein the memory portion has a rewritable memory portion and a non-rewritable memory portion,

wherein the non-rewritable memory portion is capable of storing information in advance, and

wherein the rewritable memory portion is capable of writing and reading information from the wireless signal.

8. The terminal device according to claim 2, wherein the high frequency circuit, the logic portion, the memory portion, and the display portion are formed using a transistor formed over an insulating substrate.

10. The terminal device according to claim 2, wherein electric power needed for operation of circuits of the terminal device is generated by applying wireless communication.

12. The terminal device according to claim 2, further comprises a speaker.

14. The terminal device according to claim 2, wherein the display portion includes a light emitting element or a liquid crystal.

15. A communication system comprising:

a terminal device including an antenna to transmit and receive a wireless signal, a high frequency circuit operationally connected to the antenna, a logic portion to which an output from the high frequency circuit is inputted, a memory portion to store an output from the logic portion, and a display portion to which an output from the logic portion is inputted;

a reader/writer for communication to transmit and receive information to and from the terminal device;

a host computer operationally connected to the reader/writer for communication; and

an information communication means to input and output information to and from the host computer,

wherein the terminal device has a function of displaying information from the information communication means on the display portion.

17. The communication system according to claim 15, wherein the memory portion has a rewritable memory portion and a non-rewritable memory portion.

19. The communication system according to claim 15,

wherein the memory portion has a rewritable memory portion and a non-rewritable memory portion,

wherein the non-rewritable memory portion is capable of storing information in advance, and

wherein the rewritable memory portion is capable of writing and reading information from the wireless signal.

21. The communication system according to claim 15, wherein the high frequency circuit, the logic portion, the memory portion, and the display portion are formed using a transistor formed over an insulating substrate.

23. The communication system according to claim 15, wherein electric power needed for operation of circuits of the terminal device is generated by applying wireless communication.

25. The communication system according to claim 15, wherein the terminal device further comprises a speaker.

27. The communication system according to claim 15, wherein the display portion includes a light emitting element or a liquid crystal.

29. The communication system according to claim 15, wherein a memory portion and a logic portion are provided in the reader/writer for communication to transmit to and receive from the terminal device without exchanging information with the host computer.

31. The communication system according to claim 15, wherein the information communication means is at least one of the group consisting of a telephone line, an alarm system, and an office network system.

16. A communication system comprising:

a terminal device including an antenna to transmit and receive a wireless signal, a high frequency circuit operationally connected to the antenna, a logic portion to which an output from the high frequency circuit is inputted, a memory portion to store an output from the logic portion, a display portion to which an output from the logic portion is inputted, and an optical sensor;

a reader/writer for communication to transmit and receive information to and from the terminal device;

a host computer operationally connected to the reader/writer for communication; and

an information communication means to input and output information to and from the host computer,

wherein the terminal device has a function of displaying information from the information communication means on the display portion, and the optical sensor for detecting an amount of external light and controlling a brightness of the display portion according to the amount of external light which is detected.

18. The communication system according to claim 16, wherein the memory portion has a rewritable memory portion and a non-rewritable memory portion.

20. The communication system according to claim 16,

wherein the memory portion has a rewritable memory portion and a non-rewritable memory portion,

wherein the non-rewritable memory portion is capable of storing information in advance, and

wherein the rewritable memory portion is capable of writing and reading information from the wireless signal.

22. The communication system according to any one of claim 16, wherein the high frequency circuit, the logic portion, the memory portion, and the display portion are formed using a transistor formed over an insulating substrate.

24. The communication system according to claim 16, wherein electric power needed for operation of circuits of the terminal device is generated by applying wireless communication.

26. The communication system according to claim 16, wherein the terminal device further comprises a speaker.

28. The communication system according to claim 16, wherein the display portion includes a light emitting element or a liquid crystal.

30. The communication system according to claim 16, wherein a memory portion and a logic portion are provided in the reader/writer for communication to transmit to and receive from the terminal device without exchanging information with the host computer.

32. The communication system according to claim 16, wherein the information communication means is at least one of the group consisting of a telephone line, an alarm system, and an office network system.