Patent Number: 6,480,726

Title: Portable telephone device

Abstract: A portable telephone device can inform the surroundings unintentionallythat a user is talking during speaking on the portable telephone. Aspeaking state display means 7 that goes on and off during speaking isprovided on a back surface side of a body case 1 in relation to anoperational surface side thereof and at a position where it is not coveredwith a hand when a user holds a portable telephone device. When it isdetected that the portable telephone device enters on the speaking state,the speaking state display means 7 is turned on and off by a control means10 at regular intervals while the brightness is being gently increased orgently decreased, whereby the speaking state display means is turned onand off just like a firefly. Further, the brightness is set to a lowdegree by which a person near the portable telephone device can identifythe brightness, whereby the consuming electric power of a battery issuppressed low and a hindrance to the speaking time of the portabletelephone is prevented.

Inventors: Sato; Masaaki (Kanagawa, JP), Mochizuki; Makoto (Kanagawa, JP), Nagasawa; Naokazu (Kanagawa, JP)


International Classification: H04M 1/725 (20060101); H04M 1/72 (20060101); H04M 1/22 (20060101); H04M 1/656 (20060101); H04M 1/73 (20060101); H04M 1/65 (20060101); H04B 001/38 (); H04M 001/00 ()

Expiration Date: 11/12014