Radio selective calling receiver

Details Radio selective calling receiver Radio selective calling receiver

1997-08-15

2001-04-17

Horabik, Michael (Department: 2635)

Communications: electrical

Continuously variable indicating

With meter reading

C345S182000

Reexamination Certificate

active

06218957

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a radio selective calling receiver having a display function.
2. Description of the Prior Art
Conventionally, there is a known radio selective calling receiver having a message display function. This type of a radio selective calling receiver has generally a display unit which is not large enough to display an entire long message at a time and therefore which scrolls such a long message in units of a column or a line to display the entire message. As an example, there is disclosed a radio selective calling receiver in which a message is scrolled in units of a dot on a screen, for example, in Japanese Non-examined Patent Publication No. HEI 1-265733. In this radio selective calling receiver, if an attempt is made to display a message having 21 characters of 123
456ABCD789
on a display unit on which 14 characters can be displayed on two lines, initially 14 characters of 123
456ABCD are displayed from the beginning of the message as shown in FIG.
1
A. When the currently-displayed seven characters are scrolled up in units of a dot to display seven characters of 789
which are not displayed yet, the upper dots of 123
on the first line gradually disappear as shown in FIG.
1
B and the upper dots of 789
on the third line begin to appear at the same time.
In the conventional radio selective calling receiver, however, there is a problem that, when a part of the characters on the uppermost line disappears due to the scrolling as described in the above, it becomes very hard to recognize the characters, which makes it impossible to check the connection with a part of the message on the lower line.
SUMMARY OF THE INVENTION
The present invention is provided to solve the above problem. It is therefore an object of the present invention to provide a radio selective calling receiver which allows a message to be easily read by anybody with a definitive display showing a connection in a message being scrolled on a screen.
To achieve the object described above, a radio selective calling receiver according to the invention has a control circuit for scrolling a message displayed on a screen vertically in units of a dot and then switching characters on the line gradually disappearing due to the scrolling to a simple display which can be recognized as characters when it becomes impossible to recognize them as characters based on a switch operation of a switching circuit.
Furthermore, a radio selective calling receiver according to the invention has the control circuit for scrolling a message displayed on the screen vertically in units of a dot and then, if the message is scrolled up, erasing the characters on the uppermost line gradually from the lower dots without scrolling the characters on the uppermost line or, if the message is scrolled down, displaying the characters from the upper dots of the characters on the uppermost line which appear due to the scrolling, based on a switch operation of the switching circuit.
Still furthermore, a radio selective calling receiver according to the invention has the control circuit for scrolling a message displayed on the screen vertically in units of a dot and then, if the message is scrolled down, switching the simple display which can be recognized as characters to the normal display according to the number of the displayed dots on the characters on the uppermost line which appear due to the scrolling, based on a switch operation of the switching circuit.


REFERENCES:
patent: 4646081 (1987-02-01), Tsunoda
patent: 5838295 (1998-11-01), Aoyama
patent: 32 28 589 (1984-02-01), None
patent: 61-59922 (1986-03-01), None
patent: 01265733 (1989-10-01), None
patent: 4-225629 (1992-08-01), None
patent: 7-240953 (1995-09-01), None

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