Source: https://patents.google.com/patent/US6725064
Timestamp: 2018-03-19 07:11:15
Document Index: 253938544

Matched Legal Cases: ['art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20']

US6725064B1 - Portable terminal device with power saving backlight control - Google Patents
US6725064B1
US6725064B1 US09615262 US61526200A US6725064B1 US 6725064 B1 US6725064 B1 US 6725064B1 US 09615262 US09615262 US 09615262 US 61526200 A US61526200 A US 61526200A US 6725064 B1 US6725064 B1 US 6725064B1
US09615262
Kiichirou Wakamatsu
If the input flag is set indicating the character/number input mode (YES at step 450), the microcomputer 59 turns on the transistors 1 and 2 at steps 460 and 461 to illuminate the display unit 30 and the key unit 20 by the light emitting diodes 7 a to 7 f, respectively. If the input flag is reset (NO at step 450), the microcomputer 59 turns on the transistor 1 at step 470 to illuminate mostly the display unit 30 and the function key part 20A of the key unit 20 by the light emitting diodes 7 a and 7 b. However, it turns off the transistor 2 at step 471 so that the ten key part 20B of the key unit 20 is not illuminated by the light emitting diodes 7 c to 7 f.
Further, if the cellular phone is in the wait condition (YES at step 410) or the predetermined time T0 has lapsed after the last key manipulation (YES at step 420), the microcomputer 59 turns off both transistors 1 and 2 so that the display unit 30 and the key unit 20 are not illuminated.
After inverting the display contrast of “GENERATE MAIL” on the display unit 30 by manipulating the arrow key 20 a (for instance, 7), the FIX key 20 b is manipulated to select “GENERATE MAIL”, that is, electronic mail transmission mode, of the displayed menu. Then the arrow key 20 a is manipulated again to scroll the display screen so that mail address position selection screen appears on the display unit 30. When the FIX key 20 b is manipulated again, the mail address input screen is fixedly displayed on the display unit 30 as shown in FIG. 9B so that character/number input mode is executed. At this time, the character input flag is set in the memory unit 55, and the ten key part 20B is also illuminated by the light emitting diodes 7 c to 7 f.
When the ten keys are manipulated to input the mail address as shown in FIG. 9C, the display unit 30 displays the input address. When the FIX key 20 b is then manipulated, the character input flag in the memory unit 55 is reset so that the illumination for the ten key part 20B is stopped.
Then, the arrow key 20 a is manipulated again to scroll the display screen so that a mail transmission (SEND) screen appears on the display unit 30. When the FIX key 20 b is manipulated again, the mail is transmitted or sent out, and the display unit 30 displays SEND screen as shown in FIG. 9G. Thus, the electronic mailing processing ends. The illumination of the display unit 30 and the function key part 20A is finally stopped after 10 seconds from the last manipulation of the FIX key 20 b.
According to the third embodiment, the ten key part 20B is illuminated only in the character/number input mode is executed, while the display unit 30 and the function key part 20A are illuminated continuously as long as the display unit 30 is displaying information. Thus, the electric power of the secondary battery 58 is saved.
1. 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.
2. A portable terminal device as in claim 1, further comprising:
check means for checking whether the key unit and the display unit are continuously illuminated by the illumination unit for a predetermined time;
the light control means controlling the illumination unit in another predetermined mode thereby to stop illuminating the key unit in response to a positive check result of the check means;
music check means for checking whether the music is stopped after the second predetermined mode of the illumination unit; and
the light control means controlling the illumination unit to stop illuminating the display unit in response to a positive check result of the music check means.
3. A portable terminal device as in claim 2, further comprising:
manipulation check means for checking whether the touch sensor is manipulated during a negative check result of the music check means,
wherein the light control means further controls the illumination unit in response to a positive check result of the manipulation check means thereby to illuminate the display unit and key unit.
4. A portable terminal device as in claim 1, wherein: the music producing function is a karaoke function which produces both music and words of a song.
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.
US09615262 1999-07-13 2000-07-13 Portable terminal device with power saving backlight control Active 2021-11-24 US6725064B1 (en)
JP19925399 1999-07-13
JP11-199253 1999-07-13
JP2000106997A JP2001086233A (en) 1999-07-13 2000-04-07 Portable set with lighting function
JP2000-106997 2000-04-07
US6725064B1 true US6725064B1 (en) 2004-04-20
ID=26511437
US09615262 Active 2021-11-24 US6725064B1 (en) 1999-07-13 2000-07-13 Portable terminal device with power saving backlight control
US (1) US6725064B1 (en)
JP (1) JP2001086233A (en)
KR (1) KR100399873B1 (en)
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