Portable image receiving device
First Claim
1. A portable image receiving device operable with a battery as a power supply and capable of receiving television (TV) broadcast, comprising:
- a receiving unit for receiving the TV broadcast and generating a video and an audio signal; and
a control unit for detecting, during the operation of the receiving unit, the TV signal receiving level by the receiving unit at a predetermined time interval, turning off the power supply to the receiving unit when the receiving level becomes lower than a preset permissible level, detecting, after the power supply turn-“
off”
, the receiving level by intermittently operating the receiving unit at a predetermined time interval and receiving the power supply to the receiving unit when the receiving level is higher than a permissible level.
2 Assignments
0 Petitions
Accused Products
Abstract
In a portable receiving device 1 operable with a battery 18 as power supply and capable of receiving the TV broadcast outdoors, a CPU 13 detects the receiving level of the TV receiving unit 12 at timings set in the timer 24, compares the receiving level with a preset threshold level, turns off, when the receiving level becomes lower than a threshold level, the power supply to the TV receiving unit 12, subsequently detecting and performs, when the receiving level subsequently exceeds a threshold level, a control for resuming the power supply to the receiving unit 12. Thus, the power consumption in the TV receiving unit 12 when the TV radio wave receiving status is deteriorated is reduced.
23 Citations
9 Claims
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1. A portable image receiving device operable with a battery as a power supply and capable of receiving television (TV) broadcast, comprising:
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a receiving unit for receiving the TV broadcast and generating a video and an audio signal; and
a control unit for detecting, during the operation of the receiving unit, the TV signal receiving level by the receiving unit at a predetermined time interval, turning off the power supply to the receiving unit when the receiving level becomes lower than a preset permissible level, detecting, after the power supply turn-“
off”
, the receiving level by intermittently operating the receiving unit at a predetermined time interval and receiving the power supply to the receiving unit when the receiving level is higher than a permissible level. - View Dependent Claims (2, 3, 4)
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5. A portable terminal device having a telephone function having a radio unit for performing radio transmission and reception for mobile communication and a TV function having a receiving unit for receiving television (TV) broadcast and generating a video and an audio signal, either one of the two functions being selectable for use by the user, a battery being used as operation power supply, comprising:
a control unit for detecting, during the operation of the receiving unit in the selection of the TV function, for detecting, during the operation of the receiving unit, the TV signal receiving level by the receiving unit at a predetermined time interval, turning off the power supply to the receiving unit when the receiving level becomes lower than a preset permissible level, detecting, after the power supply turn-“
off”
, the receiving level by intermittently operating the receiving unit at a predetermined time interval and receiving the power supply to the receiving unit when the receiving level is higher than a permissible level.- View Dependent Claims (6, 7, 8)
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9. Control method of a portable image receiving device operable with a battery as power supply and capable of receiving the TV broadcast comprising steps of:
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detecting receiving level of the by a TV receiving unit;
comparing the receiving level with a preset threshold level;
turning off, when the receiving level becomes lower than the threshold level, the power supply to the TV receiving unit, subsequently detecting and performing, when the receiving level subsequently exceeds a threshold level; and
resuming the power supply to the receiving unit.
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Specification