The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2000
Filed:
Jun. 04, 1997
Tomoaki Hokao, Tokyo, JP;
Michihiro Ohsuge, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A portable electronic apparatus having an adjustable ringing tone volume, a light receiving element 4 for detecting external light and a control circuit 3 for controlling he tone volume in response to light detection by the light receiving element 4. When the light receiving element 4 detects light as the power supply is turned on, or a specified key arranged on the external face of the housing is pressed down, the control circuit 3 causes a loudspeaker 7 to sound a test tone, picks up its echo with a microphone 5, and stores the volume of the echo into a memory 6 as a reference volume level. The control circuit 3, when notified of the arrival of a call by a transmitter/receiver circuit 2, causes the loudspeaker 7 to sound a test tone unless the light receiving element 4 detects light, picks up its echo with the microphone 5, and compares the volume of the echo with the reference volume level stored in the memory 6. The control circuit 3, if it finds the volume of the echo greater than the reference volume, will increase the volume of the ringing tone from the loudspeaker 7. The control circuit 3, when detecting a change in ambient light (by the light receiving element 4), switches the means of notice of call arrival from the sounding of the ringing tone by the loudspeaker 7 to intermittent lighting by an LED 8.