Portable information terminal and digital camera therefor, and portable digital camera information terminal system

Abstract

A portable information terminal such as mobile communication terminal having an earphone jack for sound input / output, PHS (personal handy-phone system), PDA (personal digital assistants), and mobile personal computer; a digital camera to connect to the portable information terminal, a digital camera connected portable terminal device comprising the portable information terminal and the digital camera, as well as to a method of controlling such a portable information terminal. The existing earphone jack provided on portable information terminals can be adopted as the plug for the digital camera or insertion plug for the connector of USB cable, so that the cost can be lowered and the system made compact to provide a highly flexible portable information terminal and a digital camera for use with the portable information terminal.

Description

technical field [0001] The present invention relates to a portable information terminal, such as a portable telephone with an earphone jack for sound input / output, PHS (Personal Handyphone System), PDA (Personal Digital Assistant), mobile personal computer; a portable information terminal for use A digital camera; a portable digital camera / information terminal including an information terminal and a digital camera; and a method of controlling the portable information terminal. Background technique [0002] In recent years, against the background that the speed of data communication has been increased using portable information terminals and significant progress has been made in information communication technology, portable phones have shifted from use as telephones to integrated information tools that are being rapidly accepted. [0003] Due to this trend, users need to expand from basic information of images, music, mails to more advanced contents such as moving images and...

AI Technical Summary

Problems solved by technology

Therefore, when a digital camera is connected to a portable terminal, expensive parts and interfaces have been required in the past, so that there has been a problem that it is difficult to reduce the volume of the digital camera and the portable terminal, or to reduce the cost of the combined system

[0011] In addition, when using an RS-232C cable such as the one above, serial communication conforming to the EIA RS-232C standard is used instead of normal serial communication, so it is necessary to communicate between the portable terminal and the digital camera before starting communication. Exchanging certain commands between them to perform a so-called "handshake operation" to transfer image data after confirming that both parties are in the operational state, resulting in a problem that the image data transfer operation cannot be started immediately

This leads to the problem that when one is about to record an image, it takes some time to press the keys before reaching the stage where the recording mode is defined

And, in order to define the image recording mode, it is first necessary to select the image recording mode, and then operate the definition key, so when the user operates the key to define the parameters of the image recording mode, the user needs to watch the display part of the portable terminal, therefore, the problem that occurs is : It not only complicates the key operation, but also loses the opportunity to record a good image

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