JP2608591B2 - Wireless paging receiver with display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of use" The present invention relates to a radio paging receiver with a display suitable for use in a pager or the like.

2. Description of the Related Art As a receiver such as a pager, a radio pager with a display is used. When the message from the sender is received by the radio pager with display, the message is temporarily stored in a memory provided in the receiver. At the same time, the bell of the receiver rings, informing the recipient that the message has been received. Then, the receiver can confirm the contents by displaying the message stored in the memory on the display unit. The display of the message on the display unit is performed in page units. And
The recipient can display the character string of the page next to the page currently displayed on the display by pressing the scroll switch provided on the receiver.

"Problem to be Solved by the Invention" By the way, the above-described conventional radio pager with display, even if the currently displayed message is the last page,
It has no means to inform the recipient of this. For this reason, even if the last page is displayed, the receiver must keep pressing the scroll switch and confirm that the message is not displayed on the display unit to determine the end of the message.

The present invention has been made in view of the above-described circumstances, and has as its object to provide a display-equipped radio paging receiver that can easily know a message currently being displayed when the message is the last page. There is.

"Means for solving the problem" The present invention relates to a display-equipped radio paging receiver having a function of displaying a message received by wireless communication, a shift register for storing character data constituting the received message, A display unit for displaying character data in a specific storage area in the shift register; a scroll switch for shifting the character data stored in the shift register in page units; and a character data start code provided in a predetermined part of the shift register. And a code detector that detects a character data end code and outputs a start detection signal and an end detection signal; a flip-flop that is set or reset by the start detection signal and the end detection signal; Value, the shift register And a sound generator for generating a buzzer sound when the shift operation is completed.

[Operation] According to the above configuration, when the message being displayed on the display unit is the last page, a buzzer sound is generated from the sound generation unit at the end of scrolling.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a radio paging receiver with display according to one embodiment of the present invention. In this figure, 1 is a CPU
(Central processing unit), which performs communication control and display control of received messages in the receiver. Reference numeral 2 denotes a shift register for storing character data constituting a received message, and a plurality of character storage areas for storing character data of one character are connected in cascade. Reference numeral 3 denotes a display unit for displaying a character string of four characters, which is supplied with character data stored in the second to fifth character storage areas of the shift register 2 and displays the corresponding character. Reference numeral 4 denotes a scroll switch. When this scroll switch is pressed, a shift clock is supplied from the CPU 1 to the shift register 2 so that the character data in each character storage area in the shift register 2 is sequentially shifted to the adjacent character storage area according to this shift clock. Has become. The shift of the character data is performed in units of one page (four characters). That is, when the scroll switch 4 is pressed once, four shift clocks are output from the CPU 1 and each character data in the shift register 2 is four times.
It is designed to be shifted to the storage area of the destination. 5 and 6 are sign detectors. Here, the code detector 5 is
When the character data in the first character storage area of the shift register 2 is an STX (start of text) code indicating the beginning of the message, a start detection signal is output, and the code detector 6 outputs the sixth character storage area of the shift register 2. When the character data in is an ETX (end of text) code indicating the end of the message, an end detection signal is output. Reference numeral 7 denotes a set / reset flip-flop, which is reset by a start detection signal and set by an end detection signal. The flip-flop 7 is designed so that the reset operation is prioritized when set and reset are performed at the same time. 8 is an oscillator,
Oscillates according to the oscillation control signal from CPU1. 9 is AN
It is a D (logical product) gate, and is supplied with the Q output of the flip-flop 7 and the oscillation output of the oscillator 8. Reference numeral 10 denotes a speaker, which emits a buzzer sound according to the output signal of the AND gate 9.

Hereinafter, the operation of the radio pager with display will be described. When the message is received by the receiver, the STX code is added to the beginning of the message and the ETX code is added to the end of the message, and the resulting character data string is transferred to the shift register 2.

Here, these character data strings are input from the final character storage area of the shift register and are sequentially shifted and transferred to the first character storage area. And the first of the character data string
The shift operation ends when the character data (STX code) reaches the first character storage area of the shift register. Then, when the STX code reaches the first character storage area of the shift register 2, the code detector 5 outputs a start detection signal and the flip-flop 7 is reset.

FIG. 1 shows the data storage state of the shift register 2 at the end of the shift operation, taking as an example the case where an 8-character message "ABCDEFGH" is received. here,
The first character storage area of the shift register is the STX code, the 10th code.
The ETX code is stored in the character storage area, and the display unit 3
Is supplied with the character data stored in the second to fifth character storage areas of the shift register 2 and the character string "ABCD" is displayed. When the supply of the shift clock to the shift register 7 ends, an oscillation control signal is supplied from the CPU 1 to the oscillator 8, and the oscillator 8 oscillates for a certain period. However, at this time, since the flip-flop 7 is in the reset state, this oscillation output is blocked by the AND gate 9, and the buzzer sound is not emitted from the speaker 10.

Since the buzzer is not sounded, the receiver determines that there is a message following the currently displayed message. Then, the scroll switch 4 is pressed to confirm the subsequent message. The operation of this scroll switch 4 is CP
The shift clock is supplied from the CPU 1 to the shift register 2 after being detected by U1. As a result, shift register 2
Are shifted to the character storage area four characters ahead. As a result, the display unit 3 displays the character string “EFGH”. At this time, since the sixth character storage area of the shift register 2 has the ETX code, this is detected by the code detector 6 and an end detection signal is output. As a result,
The flip-flop 7 is set. When the shift operation of the shift register 2 is completed, the CPU 1 causes the oscillator 8
Is supplied to the oscillator 8, and the oscillator 8 oscillates for a certain period. At this time, since the flip-flop 7 is in the set state, the oscillation output of the oscillator 8 is supplied to the speaker 10 via the AND gate 9 and a buzzer sound is generated. As a result, the recipient knows that it is the final page of the currently displayed message.

If the number of characters in the message is within four characters, the ETX code passes through the sixth character storage area of the shift register 2 at the time of the first display. Therefore, the code detectors 5 and 6 simultaneously output the start detection signal and the end detection signal. In this case, since the flip-flop 7 has the reset priority, it is reset and the Q output becomes “0”,
No buzzer sound is generated after the shift operation is completed.

[Effects of the Invention] As described above, according to the present invention, a shift register that stores character data constituting a received message, a display unit that displays character data in a specific storage area in the shift register, A scroll switch for shifting the character data stored in the register in page units, and a scroll switch provided in a predetermined portion of the shift register;
A code detector that detects a character data start code and a character data end code, and outputs a start detection signal and an end detection signal; a flip-flop set or reset by the start detection signal and the end detection signal; When the output data has a predetermined value, a sound generator for generating a buzzer sound at the time of completion of the shift operation in the shift register is provided, so that it is easy to determine whether or not the currently displayed message is the one following the next page. It is possible to make a judgment.

[Brief description of the drawings]

FIG. 1 is a block diagram of a radio paging receiver with display according to one embodiment of the present invention. 2 ... Shift register, 3 ... Display section, 4 ... Scroll switch, 5, 6 ... Code detector, 7 ... Flip-flop, 8 ... Oscillator, 10 ... Speaker.

Claims (1)

(57) [Claims] 1. A wireless paging receiver having a function of displaying a message received by wireless communication, comprising: a shift register for storing character data constituting the received message; and a shift register for storing a specific storage area in the shift register. A display unit for displaying character data; a scroll switch for shifting the character data stored in the shift register in page units; and a scroll switch provided in a predetermined portion of the shift register for detecting a character data start code and a character data end code. A code detector that outputs a start detection signal and an end detection signal, a flip-flop set or reset by the start detection signal and the end detection signal, and when output data of the flip-flop is a predetermined value,
A sound generator for generating a buzzer sound at the time of completion of the shift operation in the shift register.