JP3041853B2 - Message display control device in radio selective call receiver - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver, and more particularly to a message display control device for displaying a message included in a received signal to a user.

[Conventional technology]

Conventionally, various types of radio selective call receivers have been proposed or put into practical use. One of them has a plurality of selective call numbers. There is a radio selective call receiver that performs a call notification by matching any one of a plurality of selective call numbers assigned to a user and displays a message included in the received signal on a display.
Various methods can be used as a method of using a plurality of selective call numbers. For example, a method of using a specific selective call number for emergency call is often employed.

Conventionally, in such a radio selective calling receiver, as a method of notifying a user of which of a plurality of selective calling numbers of the user has received information, a number or a character corresponding to each selective calling number is used. Is displayed on a display device.

[Problems to be solved by the invention]

As described above, the method of indicating to the user at which selective call number the information was received by displaying the numbers and characters corresponding to each of the selective call numbers on the display,
Although it is an effective method in a certain aspect, it is difficult to immediately determine which call is made because it is necessary to accurately recognize and distinguish numbers and characters displayed on the display.
In particular, it is even more difficult when the displayed numbers and characters are small or when the surroundings are too bright compared to the display brightness.

The present invention has been made in view of such circumstances, and its purpose is to display a message included in a received signal in a predetermined display format corresponding to each selected call number, so that only the display format is used. An object of the present invention is to provide a message display control device in a radio selective call receiver that can immediately determine which call is made.

[Means for solving the problem]

In order to achieve the above object, the present invention performs a call notification by making a selected call number in a received signal coincide with any one of a plurality of selected call numbers assigned to the self in advance, and performs a call notification on the received signal. A display device capable of displaying a message in any of a plurality of message display modes, such as a blinking display, a black-and-white inverted display, a normal display, etc. Determining means for determining which of the plurality of selective calling numbers assigned to the selected calling number in the received signal matches the selected calling number in advance; and displaying the display form according to the determination result of the determining means to the display device. And a display form selecting means for displaying the message by designating the same.

[Action]

In the message display control device in the radio selective call receiver according to the present invention, when the selective call number in the received signal matches any one of a plurality of selective call numbers assigned to itself, a call notification is performed and The determination means determines which of the selected call numbers in the received signal matches the selected call number, and the display mode selection means specifies a display mode according to the determination result on the display device, and the display device is designated by the specified display mode. The message in the received signal is displayed in the displayed form.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a main block diagram showing an example of a radio selective call receiver to which the present invention is applied. In FIG. 1, a radio signal input from an antenna 1 is amplified and demodulated by a radio unit 2 and shaped into a digital signal by a waveform shaping circuit 3. The decoder 4 includes its own selective call number (generally, there are a plurality of types, here, three, called Acall, Bcall, and Ccall) written in the PROM 5 in advance and the digital signal from the waveform shaping circuit 3. The selected call number is compared with the selected call number, and if they match, the CPU 8 notifies the CPU 8 that there is a call, and sends a signal including the current selected call number and the message to the CPU 8. At the same time, the decoder 4 sends a sound signal to the amplifier 6, and the speaker 7 is driven to make a call notification. When notified of the call, the CPU 8 determines which selected call number has been called, passes a message to the display driver 9 together with designation of the display mode corresponding to the current selected call number, and displays the message. The display driver 9 drives the display 10 so that the message is displayed in the specified display mode.

FIG. 3A shows an example of the overall configuration of a received signal used in this embodiment. In FIG.
P indicates a preamble signal (preamble signal), F indicates a frame synchronization signal (SC signal), N indicates a selective calling signal, and I indicates a message signal. A plurality of message signals I are arranged according to the length of the message. FIGS. 3B and 3C show examples of the format of the selective calling signal N and the message signal I, respectively. Both have a 32-bit configuration, of which the first 31 bits are BCH codes (Bose-Chaud
huri-Hocquenghem). This code is composed of 21 information bits (the 2nd to 21st bits are a selective call number or a message) and 10 check bits.
The bit distinguishes between the selective calling signal and the message signal. The last 32nd bit is a parity bit generated by 1 to 31 bits.

FIG. 4 is a main block diagram showing a specific configuration example of the CPU 8. In the figure, reference numeral 301 denotes a program memory in which an instruction to be executed is stored; 302, a program counter for designating the contents of the address of the program; 303, an instruction from the program memory 301, which is decoded and corresponded to each unit. An instruction decoder 304 for supplying a control signal; an arithmetic logic unit (ALU) 304 for performing arithmetic and logical operations;
5 is an accumulator, 306 is a stack pointer used for saving various registers and programs, 307 is a data memory used for storing data, and 308 and 309 are input / output ports.

FIG. 1 is a flowchart showing an example of the display control process performed by the CPU 8. Hereinafter, the operation of the message display control according to the present embodiment will be described with reference to the drawings.

When the power switch (not shown) is turned on, the CPU 8
Performs a function check to confirm that the radio selective calling receiver operates normally (step S1), and enters a call waiting state (step S2). If a call is received (step S3), the process is determined by determining whether the selected call number sent from the decoder 4 is Acall, Bcall, or Ccall (steps S4, S9).

Now, a display device composed of the display driver 9 and the display device 10 shown in FIG. 2 has a flashing display mode in which display characters and the like flash, and an inverted display mode in which the display characters and the background color are inverted from normal. And three types of display modes, a normal display mode in which display characters and the like do not blink and the background color is also normal, and the Acall message is displayed in the normal display mode on the display 10.
When the Bcall message is displayed on the display 10 in a blinking display form and the Ccall message is displayed on the display 10 in an inverted display form, the CPU 8
At the time of Bcall and Ccall, the following processing is executed respectively.

In the case of Acall, the message sent from the decoder 4 following the selected call number is stored in the data memory 307 (step S5). Subsequently, a code “00” for designating the display device driver 9 to perform a normal display operation is stored in the data memory 307 from the data area in the program memory 301 (step S6). And
The code "00" and the message in the data memory 307 are sent to the display driver 9 via the input / output port 309 (step S7). In response to this, the display driver 9 drives the display 10 so that the received message is displayed in the normal display mode, whereby the message is displayed on the display 10 in the normal display mode (step S8).

In the case of Bcall, after storing the message in the data memory 307 (step S10), the code "01" for designating the display driver 9 to perform the blinking display operation is stored in the data area in the program memory 301. And store it in the data memory 301 (step S11). Then, the code "01" and the message are sent to the display driver 9 via the input / output port 309 (step S12). As a result, the message is displayed on the display 10 in a blinking display form (step S13).

Similarly, in the case of Ccall, processing is performed using a code "10" indicating display color inversion (steps S14 to S17). As a result, the message is displayed on the display 10 in a reverse display mode (step S18).

〔The invention's effect〕

As described above, in the message display control device in the radio selective call receiver of the present invention, it is possible to determine which selective call number has been called by a message display form such as blinking display, reverse display, and the like. It is possible to immediately determine which call is made, as compared with the conventional device which had to accurately recognize the display of numbers and characters corresponding to the selected call number.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an example of display control processing of the CPU 8, FIG. 2 is a block diagram of an essential part of an example of a radio selective call receiver to which the present invention is applied, and FIG. FIG. 4 is a block diagram showing an example of the structure of a signal, and FIG. In the figure, 1 ... antenna, 6 ... amplifier 2 ... radio unit, 7 ... speaker 3 ... waveform shaping circuit, 8 ... CPU 4 ... decoder, 9 ... display driver 5 ... PROM, 10 ……display

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04B ^7/ 24-7/26 H04Q ^7/ 00-7/04

Claims (1)

(57) [Claims] 1. A radio which alerts a call when a selected call number in a received signal matches any one of a plurality of selected call numbers assigned to the self and displays a message included in the received signal. In the selective call receiver, a display device capable of displaying a message in an arbitrary display form among a plurality of message display forms, and a plurality of selective call numbers in which the selective call number in the received signal is previously assigned to itself. A judgment unit for judging which one of them matches, and a display mode selection unit for specifying the display mode according to the judgment result of the judgment unit to the display device and displaying the message. Message display control device in a radio selective call receiver to be activated.