Mobile terminal device

Abstract

It is possible to assure visibility of a display unit and suppress noise during communication using a receiver and a microphone. In a mobile terminal device, when communication operation is performed by an operation unit (18) and an audio communication is started by a communication circuit (11) and a transmission / reception unit (12), a control unit (16) judges whether a hands free device (20) is connected. If the hands free device (20) is not connected, it is decided that a user holds a device case on his / her ear to use a receiver (13) and a microphone (14) of the device main body, and at least one of the drive method and drive frequency of a display unit (19) consisting of a liquid crystal display is modified so as to perform drive operation, giving priority to the acoustic characteristic. On the other hand, if the hands free device (20) is connected, the drive method and the like are not modified and a drive operation of high image quality is performed, giving priority to the optical characteristic of the display unit (19).

Description

Technical field [0001] The present invention relates to a portable terminal device including a liquid crystal display unit, such as a portable telephone and a portable information terminal (PDA). Background technique [0002] The multi-functions of portable communication terminal devices such as portable phones have advanced, and products that perform data communication such as e-mail in addition to voice phone calls and can browse information by accessing various information providing servers are widely used. [0003] If a voice phone call is performed by using a portable communication terminal device such as this, the user puts his ear close to the phone receiving unit in which the receiver is arranged, and listens to the received voice of the other party in the phone call, while calling with the phone When the other party is talking, the user generates sound to the phone microphone unit in which the microphone is arranged. Also, in the case of browsing data such as e-mail and ...

AI Technical Summary

Problems solved by technology

[0005] As described above, in a portable terminal device including a liquid crystal display unit, there are cases where a glass panel or the like arranged on the front surface vibrates according to a driving system and a driving frequency to generate noise, and, specifically, accompanying the liquid crystal display unit The increase in the size of the device, the miniaturization and thinning of the device, and the high-quality display increase the possibility of noise.

In a portable terminal device having a voice telephone call function such as a portable telephone, in the case where the user puts his ear close to the telephone receiving unit, the user is disturbed by the vibration noise of the liquid crystal display unit and the resonance noise of the casing, thereby fearing that it will make a telephone call. bring problems

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