JPH0444450B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] This invention relates to an individual selective call receiver with a display. especially,
The present invention relates to an indicator circuit for an individual selective call receiver with an indicator.

[Description of prior art]

Conventional individual selective call receivers with displays display information signals from the right edge to the left edge or from the bottom edge as a method of displaying information signals that are larger than the maximum number of characters that can be displayed on the display when displaying the contents of the information signal on a visual display. Because the system used a method of scrolling characters one by one from the top to the top, it had the disadvantage that the information signals were difficult to read. This seems to be because the human mind processes sentences by reading the text word by word and associating those words.

As a method for eliminating this drawback, a method of scrolling word by word is proposed in Japanese Patent Application No. 57-62022 "Individual selective call receiver with display". However, even with this proposed method, if multiple words are displayed and you scroll word by word, the information before and after the scroll is compared, the newly displayed words are recognized, and the sentence is assembled. It was somewhat cumbersome and had the disadvantage of having to scroll the number of words to display the full information signal.

Furthermore, in an individual selective call receiver that scrolls and displays characters one by one, a technology has been proposed that detects spaces between words and changes the scrolling speed on a word-by-word basis to make words easier to see (Japanese Patent Application Laid-Open No. Publication No. 58-83890).

However, this technology still scrolls the words one after the other, but the words are displayed intermittently, so the ease of viewing the words has not yet been improved sufficiently.

[Purpose of the invention]

The present invention improves the above-mentioned drawbacks, and makes it easier to read and understand the contents of the information signal displayed on the display, and further reduces the number of scrolls. The purpose is to provide a receiver.

[Features of the invention]

The present invention receives and demodulates a carrier wave modulated with an individual selective paging signal and an information signal following it, decodes the individual selective paging signal, and when it is determined that this signal is the own paging signal, decodes the information signal. However, in an individual selective call receiver that displays the contents of the information signal on a visual display based on this decoded signal, the information signal is handled not in units of characters but in units of words, and the information signal is displayed once on the display. If all the words that should be displayed cannot be completely displayed on the display screen, the words that could not be displayed will not be displayed, and the previously displayed information will be erased for a certain period of time or by manual operation of the switch, and the undisplayed information will be displayed on the display. It is characterized by displaying from the beginning.

Furthermore, the present invention allows the display to blink within the range of the one-time display capacity of the display when all of the information signals stored in the data memory have not been displayed and still remain in the data memory. Alternatively, it can be configured to notify by symbol display.

[Explanation based on examples]

An embodiment of the present invention will be described based on the drawings. FIG. 1 is a configuration diagram showing the main parts of an apparatus according to an embodiment of the present invention. In Fig. 1, 1 is an antenna that receives a radio signal, 2 is a radio device that demodulates the received radio signal, 3 is a waveform shaping circuit, and 4 is a demodulated signal that detects its own selective calling signal and detects message signal data. A decoder unit performs judgment processing, reporting operations, and controls each part, and 5 is a display unit, which is an 8-digit display LCD (Liqiud
Crystel Device). 6 shows a drive circuit (for example, μPD7227G manufactured by NEC) for driving the display section 5. As shown in FIG. 7 is an oscillator, and the output of this oscillator 7 is connected to a speaker 8.

Further, reference numeral 10 connects or disconnects the power supply to each part according to a timing signal from the decoder part 4.
This is an electronic switch circuit that performs (battery saving). 11 is a power supply, 12 is a DC/DC converter, and 13 is a clock oscillator. In addition, the decoder unit 4 is a PROM in which a code (hereinafter referred to as "call number") corresponding to the selective call signal that the user wishes to receive is written in advance.
(Programmable Read Only Memory) 14 and a display start switch 15.

FIG. 2 is a detailed diagram of the decoder section 4. As shown in FIG. Second
In the figure, 20 is an instruction decoding section, which is a central part that decodes the code to be executed and controls each block for executing the instruction. A program memory 21 stores a group of instructions to be executed. 22
is the program counter, and the program memory 21
This is a counter for specifying the address of the program written to. Further, 23 is a counter circuit, and 24 is an interface circuit that outputs an output signal SD for transferring data to the display section 5 and a synchronization signal SCK for the display section 5 to read data. Further, 25 is an arithmetic circuit that stores arithmetic results and exchanges data with a memory circuit, an input/output port, a register, and the like. 26 is an input port for inputting the rectangular signal from the waveform shaping circuit 3, 27 is an output port for outputting an addressing signal for reading the PROM 14, and 28 is an output port for outputting an address designation signal for reading the PROM 14.
An input port is used to input the contents of the address of the PROM 14, 29 is an internal data bus through which data is sent and received between blocks, and 30 is a data memory.

FIG. 3 is a diagram showing a signal format used in the apparatus of the above embodiment. In FIG. 3, P is a preamble signal, S is a word synchronization code, SC ₁ and SC ₂ are call numbers I ₁ and I ₂ are information signals, and E is an end code.

The operation of the embodiment apparatus will be explained below based on FIG. In the figure, a radio signal received by an antenna 1 is amplified, detected, and demodulated by a radio section 2. This demodulated signal is converted into a rectangular signal by the waveform shaping circuit 3 and input to the decoder section 4. When the preamble signal P is detected in this input signal, the battery saving operation is canceled and the process moves on to detecting the word synchronization code S and then detecting the calling number of the local station, for example, _SC1 .
When the call number SC ₁ that matches the content written in the PROM 14 is detected, a call activation signal is immediately output to the oscillator 7. At the same time, call number
Information signal expressed in 7bit ASCII code following SC ₁
Detect I ₁ . The information signal _I1 expressed in the ASCII code is temporarily stored in an internal data memory 30. This is read out by operating the display start switch 15 and transferred to the display section 5. At the same time, a display control signal is also sent. Also, upon detection of the end code, the battery saving operation is demodulated. The display section 5 internally processes the input ASCII code, and drives each segment of the display section 5 according to the display control signal to display the contents of the information signal _I1 . Further, the oscillator 7 starts oscillating at a low frequency in response to the input call activation signal, amplifies this, and drives the speaker 8 . As a result, the speaker 8 produces a ringing tone.

Figure 4 shows the display, where one line
Symbols (arrows) can be displayed on a 16-digit display.
This symbol display is used to notify that there are information signals that are not displayed when displaying information signals with 16 digits or more. That is, the receiver holder can determine whether there is undisplayed information based on this symbol display.

Figure 5 is an example of an information signal, PLEASE
GO TO 19TH HOLE AT 3 PM. is stored in _d1 of the data memory 30 in ASCII code. _This information signal has the signal format shown in _FIG . can get. The information signal stored in _d1 of the data memory 30 is stored in a matrix format so that it can be easily processed by the decoder section 4, and for convenience, it is referred to as D(x). For example, each character of the information signal can be read out according to the parameter x, such as D(1)=P and D(15)=9. Also, here is an example in which spaces are used to separate words.
In addition to the above method, there are other ways to indicate word breaks, such as using other symbols or using multiple symbols.

FIG. 6 shows an example of display of the information signal by the embodiment device. That is, in the first display, since the word "19TH" cannot be completely displayed on the display, only "PLEASE GO TO" is displayed.
Here, a symbol (arrow) is displayed because there is an undisplayed information signal after "19TH". In addition to the above-mentioned symbol display, there is also a method of indicating that there is an undisplayed information signal by displaying a blinking display information signal or by displaying a cursor. Next, the second display _T2 is activated after a certain period of time has elapsed or by a switch operation. At this time, the display information signal is displayed from the beginning of the display device than the undisplayed information signal. Again, the word "PM." is not displayed for the same reason as in T ₁ .

Next, in the third display _T3 , the remaining undisplayed information signal "PM." is displayed, and the symbol display is turned off.

FIG. 7 is a flowchart showing the flow of a processing method for executing a display operation, and the display operation will be further explained with reference to this figure. In the following explanation, each step number is written in parentheses. Also, DP is the display pointer, DS is the number of display characters, WN
is the argument, and 〓(x) represents the message data matrix.

Initial settings are executed at (100) to (120).
That is, (100) is a step for making initial settings to display message data from the beginning when the display is started, and (110) is a step for making initial settings for the number of words to transfer data to the display.
(120) is a step for initializing flags indicating the number of characters in the word and whether or not a character other than a blank is present.

In (130) to (180), processing is performed to obtain the number of characters in a word. That is, in (130) the argument
The character of the message specified by DP + DS + WN is read out, and it is determined whether it is blank or not. If it is blank, it is determined in (150) whether a character other than blank was previously present or not. If there are no characters other than blank, update the word character number (WN) at (160) and return to (130). On the other hand (130)
If it is not blank, use a period (“・”) at (140).
WF that indicates that there was a character other than blank at (170) if it is not a period.
Set the flag to FF(H) and move to (160). On the other hand, when it is ".", the WN is updated at (180) and the process moves to (260). Next, if there is a character other than a blank in (150), it is determined in (190) whether the WN instruction data can completely display the word on the display device as the number of characters in the word. Here 16 is
This is the number of characters assuming a 16-character display. If the word can be displayed, display it at (200), update the number of characters, and return to (120) to check the next word.

On the other hand, if it is determined that it cannot be displayed in (190) and (260), the process moves to (210) via (270) without updating the number of displayed characters DS, and the character indicated by DS is determined based on the display pointer DP. The number will be displayed. If the number of displayed characters does not exceed the number of characters displayed in (260), the process directly moves to (210).

(210) moves to (220) by the fixed timer or switch operation of (280) and updates the display pointer. Next, in (230), it is determined whether the final display data is a period or not, and if it is a period, the display is completed and the process returns to END. On the other hand, if it is not a period, the display pointer is updated at (240) and (250) until the first display becomes a non-blank space, and the process moves to (110) to continue displaying.

FIG. 8 shows the transition of the data contents of each register based on the operation of the processing procedure shown in the flowchart of FIG. 7 when the message data shown in FIG. 6 is displayed. First display
At T ₁ , 〓(1) to 〓(1+12=13) are displayed, and at the second display T ₂ , 〓(14) to 〓(14+14=28) are displayed. Furthermore, in the first display _T1 , the DS is not updated with the "19TH" word. Furthermore, since the DS is not updated with the word "PM." in the second display _T2 , it can be seen that these are not displayed.

〔Effect of the invention〕

According to the present invention, clear information can be conveyed because there is no display of interrupted words. Furthermore, there is no need to identify which part of the display information is the old display information and which part is the new display information each time the display is scrolled, making the displayed information signal much easier to read. Furthermore, since the number of scrolls is reduced, the operating time of the decoder section is also reduced, and power consumption is reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the main parts of the embodiment device. FIG. 2 is a block diagram of the decoder section of the embodiment device. FIG. 3 is a diagram showing the signal format. FIG. 4 is a front view of the display device of the embodiment device. FIG. 5 is a diagram showing a storage state in a data memory and an example of an information signal.
FIG. 6 is a diagram showing a display example of the embodiment device. FIG. 7 is a flowchart showing the display method of the present invention. FIG. 8 is an explanatory diagram showing register contents. DESCRIPTION OF SYMBOLS 1... Antenna, 2... Radio part, 3... Waveform shaping circuit, 4... Decoder part, 5... Display part, 6... Drive circuit, 7... Oscillator, 8... Speaker, 10... Electronic switch circuit, 11... Power supply, 12... DC/DC converter, 13...clock oscillator, 14...PROM,
15...Display start switch.

Claims (1)

[Claims] 1. A data memory for storing a received information signal, a display for optically displaying the contents of this information signal, and a transfer means for transmitting the information signal stored in the data memory to the display. In the individual selective calling receiver with a display, the transfer means divides all the words to be displayed into a set of words that can be displayed at once on the display, and sequentially transmits the above-mentioned words for each set of divided words. means for transmitting the information signal to a display device; and means for providing an indication signal that the information signal remains to the display device until it is determined that all of the information signal has been transferred to the display device; An individual selective call receiver with a display, characterized in that the display is configured to also display the presence or absence of this instruction signal.