Communications: electrical – Selective – Having indication or alarm
Reexamination Certificate
1999-05-25
2003-04-29
Horabik, Michael (Department: 2635)
Communications: electrical
Selective
Having indication or alarm
C340S007520, C340S007550, C455S158400
Reexamination Certificate
active
06556129
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a selective calling receiver displaying received message data in a display, and also to a method of displaying received message data.
2. Description of the Related Art
A conventional selective calling receiver displays message data in a display as follows, when message data to be displayed is received. First, the selective calling receiver compares a selective calling number indicated in a received signal to its own calling number stored in a memory. If they are coincident with each other, rows of message data included in the received signal are recognized as letter code, and then, the rows of message data are displayed in a display as letter data.
In the conventional selective calling receiver, a message signal is received as successive digital data. However, in a logical sense, a message data is grouped into a plurality of bit rows each including the predetermined number of bits. A bit row corresponds to a letter. The received message is displayed in a display in accordance with table look-up process. Specifically, the thus extracted bit rows are converted into letter data in accordance with a relation between letter codes and letters, stored in a read only memory (ROM), and then, the thus converted letter data is displayed in a display.
For instance, Japanese Unexamined Patent Publication No. 62-181535 has suggested a radio data display system including an input device through which message data is input, an encoder encoding an output signal transmitted from the input device, a radio transmitter which modulates carrier waves with output signals transmitted from the encoder, and transmits the thus modulated carrier waves, a radio paging receiver which demodulates the modulated carrier waves to thereby obtain message data, and displays the message data in a display, and a display on which the radio paging receiver is mounted and displays message data thereon.
Japanese Unexamined Patent Publication No. 64-2427 has suggested a selective calling radio-receiver characterized by means for displaying letters and/or figures in braille.
Japanese Unexamined Patent Publication No. 7-321938 has suggested a selective calling radio-receiver including a card interface through which the selective calling radio-receiver is connected to an external unit, a memory storing therein at least two calling numbers of the selective calling radio-receivers, and a controller which transmits both data indicating that which calling number is used at a received call and message data included in a selective calling signal to the external unit through the card interface, when a selective calling number included in a received selective calling signal is coincident with any one of the calling numbers stored in the memory.
Japanese Unexamined Patent Publication No. 10-66124 has suggested a selective calling radio-receiver including a display displaying message included in a received radio selective signal. The display is partitioned into a first display area and a second display area. In dependence on a volume of message to be displayed, the first display area is expanded into the second display area to thereby display message in the first display area.
However, the above-mentioned conventional selective calling receivers are accompanied with problems as follows.
The first problem is that it is impossible to display a letter which is not stored in ROM, because received message data consists of predetermined letter codes, and hence, only letters corresponding to received letter codes and stored in ROM can be displayed. For instance, if ROM stores therein only Japanese-language letters, it is impossible to display message including English and Chinese letters which are not stored in ROM.
The second problem is as follows. It is now assumed that message relating to data of stocks is received, and the received message indicates items such as a company's name and a price in a first row, and indicates various data associated with the items in second and later rows. If an icon indicating that message is received is automatically inserted at a head of a first row in the received message, a space located at an end in the first row is forced to eject to a head of the second row. As a result, letters are misaligned between the first and second rows, resulting in difficulty in reading the displayed message.
The third problem is as follows. If there occurred data receipt error even by only one bit while message is being received, letter codes received in a selective calling radio-receiver become quite different from letters codes having been transmitted from a transmitter such as a base station. Hence, when the selective calling radio-receiver converts the received letter codes into letters stored in ROM, the selective calling radio-receiver selects letters different from letters having been actually transmitted from a transmitter. As a result, the message displayed in a display is unclear in meaning.
SUMMARY OF THE INVENTION
In view of the above-mentioned problems in the conventional selective calling radio-receiver, it is an object of the present invention to provide a selective calling radio-receiver which is capable of displaying any kind of letters, and displaying data except letters, such as graphics, based on received message data.
It is also an object of the present invention to provide a method of displaying message data which method is capable of doing the same.
In one aspect of the present invention, there is provided a selective calling receiver including (a) a display, (b) a discriminator receiving message data and selective calling number data, and discriminating whether the message data is first data consisting of letters or second data consisting of images, based on the selective calling number data, and (c) a controller displaying the message data in the display, as letter data or image data in dependence on a discrimination result provided by the discriminator.
For instance, the message data is graphics data transmitted from a base station as text data.
There is further provided a selective calling receiver including (a) a display, (b) a memory storing at least one calling number of the selective calling receiver, (c) a comparator comparing a selective calling number contained in a received signal to the calling number of the selective calling receiver, and (d) a controller which discriminates whether received message data is text data or graphics data, based on the calling number of the selective calling receiver coincident with the selective calling number, and which displays the message data as dot data row in the display when the message data is graphics data, or displays the message data as letter data in the display when the message data is text data.
It is preferable that the memory stores a plurality of calling numbers of the selective calling receiver, each of the calling numbers being assigned to text data or graphics data.
There is still further provided a selective calling receiver including (a) a display, (b) a radio signal receiver, (c) means for detecting and waveform-shaping a radio signal having been received through the radio signal receiver, (d) a first memory storing therein at least one calling number of the selective calling receiver, (e) a second memory storing received message data therein, (f) a third memory storing therein a map defining a relation between bit rows and letter data, (g) a decoder decoding a signal transmitted from the means, and discriminating whether a calling number in a received signal is coincident with the calling number of the selective calling receiver, and (h) a discriminator discriminating whether the received message data is text data or graphics data, based on the calling number of the selective calling receiver, the discriminator storing the message data in the third memory as a letter code including at least one unit comprised of the predetermined number of bits, reading out letter data corresponding to the message data, out of the second memory, and displaying the thu
Horabik Michael
NEC Corporation
Nguyen Nam V
Whitham Curtis & Christofferson, P.C.
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