Portable terminal device with power saving backlight control
AssigneeDenso Corporation
InventorsKiichirou Wakamatsu, Tadao Suzuki
Life of this patent
Estimating the term…
Abstract
A cellular phone has back light illumination for its display unit and a key unit, and is capable of receiving internet information, receiving karaoke songs, or receiving and sending electronic mails. In the case that the cellular phone is used for electronic mailing, it is checked whether the cellular phone is operated in a character/number input mode. If it is not in the input mode, only the display unit and a function key part of the key unit are illuminated. A ten key part of the key unit is illuminated only when it is to be manipulated to change display on the display unit. In the case of executing the internet function or the karaoke function, the illumination control for the display unit and the key unit is controlled in the similar manner.
Claims7
A portable terminal device having music producing function, comprising:
- a key unit having a plurality of keys thereon;
- a display unit for displaying information in response to manipulation of the key unit;
- an illumination unit including lighting means for illuminating the key unit and the display unit, the lighting means being separate from the display unit;
- a battery for supplying the lighting means of the illumination unit with electric power;
- display control means for controlling the display unit to display words of music as the information in response to output of the music during an execution of the music producing function;
- end detection means for detecting an end of the music;
- and
- light control means for controlling the lighting means of the illumination unit in a predetermined mode, so that the lighting means of the illumination unit illuminates an entire area of the display unit, continuously during a period in which the music is produced and stops illuminating the display unit by the illuminating means when the end detection means detects the end of the music.
A portable terminal device having music producing function, comprising:
- a key unit having a plurality of keys thereon;
- a display unit for displaying information in response to manipulation of the key unit;
- an illumination unit for illuminating the key unit and the display unit;
- a battery for supplying the illumination unit with electric power;
- display control means for controlling the display unit to display words of music as the information in response to output of the music during an execution of the music producing function;
- and
- light control means for controlling the illumination unit in a predetermined mode, so that the illumination unit illuminates the display unit during a period in which the music is produced and stops illuminating the display unit when the music stops.
Dependencies are inferred from the claim text.