Mobile terminal

• US 7,577,417 B2
• Filed: 07/06/2006
• Issued: 08/18/2009
• Est. Priority Date: 04/03/2002
• Status: Active Grant

• Current Assignee: Maxell, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kuroda, Masayoshi, Hasegawa, Tsukasa, Ikuta, Katsuki, Ito, Tamotsu
• Primary Examiner(s): Trinh; Sonny
• Application Number:
  US11/480,971
• Publication Number:
  US 20060252393A1
• Time in Patent Office: 1,139 Days
• Field of Search: 455/566, 455/574, 455/575.1, 455/343.1, 455/343.2, 455/343.3, 455/343.4, 455/575.3, 455/277, 455/260, 455/313, 455/196.1, 455/255
• US Class Current: 455/313
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04M 1/725 Cordless telephones user interfaces specially adapted therefor H04M1/724
• CPC Class Codes: H04W 52/029 reducing the clock frequency of the controller
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

There is provided a cellular phone taking into consideration enhancement in processing speed and reduction in current consumption, and the cellular phone comprises a processing unit capable of executing plural kinds of processing, an oscillator for generating a clock signal to be fed to the processing unit, and a clock controller for converting the frequency of the clock signal received from the oscillator, wherein the clock controller changes the frequency of the clock signal for each of the plural kinds of the processing in response to the control by the central processing unit.

Claims

1. A mobile terminal capable of being changed from an open condition into a closed condition, comprising:

a processor which executes program processing; and

a clock controller capable of changing a frequency of a clock signal to be fed to the processor;

wherein the clock controller controls the frequency of the clock signal so as to become a first frequency when the mobile terminal is in the open condition, and controls the frequency of the clock signal so as to become a second frequency lower than the first frequency when the mobile terminal is in the closed condition, and

wherein the clock controller controls the frequency of the clock signal so as to become a frequency higher than the second frequency when a specific processing is executed even if the mobile terminal is in the closed condition, and controls the frequency of the clock signal so as to become the second frequency after the execution of the specific processing is completed.

2. The mobile terminal according to claim 1, wherein the specific processing is a processing having an effect on a response to a request from the user.

3. The mobile terminal according to claim 1, wherein the specific processing is an image decoding processing or an address retrieval processing or a character conversion processing.

4. The mobile terminal according to claim 1, further comprising an input unit which allows a user of the mobile terminal to set the frequency of the clock signal,

wherein when the frequency is set by the user using the input unit, the first frequency is the frequency set by the user using the input unit.

5. The mobile terminal according to claim 4, wherein the user can set the frequency of the clock signal in every processing using the input unit.

6. The mobile terminal according to claim 1, further comprising a display which exhibits a display corresponding to the magnitude of the frequency of the clock signal.

7. The mobile terminal according to claim 1, wherein the mobile terminal has a folded structure.