Watch type paging receiver
First Claim
1. A portable radio communication apparatus comprising:
- a body accommodating a receiving circuit of said apparatus;
display means with an optical reflector provided on said body for displaying information received by said receiving circuit; and
a main antenna including said optical reflector connected to said receiving circuit constituted by a part of structural members of said display means.
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Accused Products
Abstract
A watch type paging receiver which may be put on person'"'"'s wrist by a belt includes a body on which a display device such as a liquid crystal display device is provided. An inverted F-shaped main antenna is implemented by a part of the display device. A loop antenna is provided in addition to the main antenna and implemented by the belt. The main and loop antennas are selectively rendered active depending upon the level of a received signal. Even when the length of the belt is changed to suit person'"'"'s wrist, accurate matching is established on the basis of the resulting length of the belt. A primary battery in the form of a solar battery and a secondary battery are associated with the receiver body and the belt, respectively. A vibration source which is adapted for tactual alerting forms a part of the belt.
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Citations
25 Claims
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1. A portable radio communication apparatus comprising:
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a body accommodating a receiving circuit of said apparatus; display means with an optical reflector provided on said body for displaying information received by said receiving circuit; and a main antenna including said optical reflector connected to said receiving circuit constituted by a part of structural members of said display means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A wristwatch type pager including a belt, comprising:
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a body accommodating a receiving circuit and supported by said belt; display means provided on said body for displaying information received by said receiving circuit; a main antenna formed as a part of the structural members of said display means; wherein said belt comprises a loop antenna; and said pager further comprises antenna matching circuit means coupled to said receiving circuit and to said loop antenna and having an adjustable matching capacitance for matching the loop antenna of said belt to said receiving circuit, said capacitance changing in accordance with the length of said belt. - View Dependent Claims (24)
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25. A wristwatch type pager with a body and a belt, comprising:
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receiving circuit means accommodated in the body; loop antenna means to be coupled to said receiving circuit means; first connecting means coupled to said loop antenna means and representing the length of the belt; antenna matching circuit means for matching said loop antenna means to said receiving circuit means; and second connecting means connected to said first connecting means and to said antenna matching circuit means, the resonant frequency of said antenna matching circuit means being determined by the connection of said first and second connecting means.
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Specification