JPH07334145A - Scroll display method - Google Patents

Abstract

PURPOSE:To make contents of character information understandable from immediately after a scroll display is reopened when another information is interruption displayed temporarily while scroll displaying the character information. CONSTITUTION:A display control part 13A counts up a scroll counter part 17A periodically regularly, and scroll displays a part of the character information on a display device 2 so that a character of an address corresponding to a count value in a display buffer 14 storing the character information comes to a first figure, and interruption displays temporarily preset channel number and frequency on the display device 2 when a control part 11A issues an interruption display request by preset regis-ter operation, and stops the count up operation of the scroll counter part 17A temporarily. When the interruption display request is released, the display control part 13A restarts the count up operation of the scroll counter part 17A, and scroll displays the character information on the display device 2 so that the character of the address corresponding to the count value in the display butter 14 comes to the first figure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll display method, and more particularly to a scroll display method in which during scroll display, other information is temporarily interrupted and then restarted.

[0002]

2. Description of the Related Art In Europe, various kinds of data are multiplexed and transmitted in FM radio broadcasting, and the same program is broadcast when the reception state of the broadcast currently being received deteriorates on the side of the on-vehicle FM radio receiver. A radio data system (RDS) has been put into practical use, which is capable of automatically switching to another station or automatically switching to the traffic information broadcasting station when broadcasting of traffic information starts at a certain station. . This RDS
Then, using two formats called type 2A group and type 2B group, character information (radio text) of up to 64 characters or 32 characters can be transmitted,
Characters can be displayed on an FM radio receiver compatible with RDS. For example, information introducing a song, such as a song title, artist name, etc., can be viewed during broadcasting of a song. However, because there is a restriction on the character display space of the receiver, the character information is normally scrolled and displayed.

FIG. 15 shows a type 2A group and a type 2B.
The format of the group is shown. The Type 2A group sends 4 characters by combining 2 characters in the 3rd and 4th blocks. Address indicating the group type code (4 bits), A / B identification flag (1 bit) indicating whether the version is A or B in the second block, and 4 character number (character position in character information) Send the code (4 bits). When the 4-bit address code indicates n in decimal, the character number of the first character in the third block is 4n +
1, the second character number is 4n + 2, the character number of the first character of the second block is 4n + 3, and the second character number is 4n + 4. Therefore, it is possible to transmit the character information of 64 characters with the maximum character numbers 1 to 64 by 16 kinds of formats. In the type 2B group, two characters are sent in the fourth block. Therefore, it is possible to transmit character information of up to 32 characters with character numbers 1 to 32 by 16 kinds of formats.

FIG. 16 shows a conventional R with scroll display function.
1 shows a part of a DS compatible FM radio receiver. If the manual tuning operation or the preset tuning operation is performed on the operation panel 1 when the frequency display mode is set in advance, the controller 11 of the system controller 10 of the microcomputer configuration performs the corresponding tuning control as the front end. (Not shown) to clear the reception buffer memory unit 12. Further, the display control unit 13 is instructed to display the reception frequency (when manual tuning is performed) or the channel number and the reception frequency (when preset tuning is performed), and the display buffer memory unit 14 is operated.
Is cleared, and the reception frequency or channel number and the reception frequency are displayed on the 8-digit display 2 for a certain period of time.

In contrast to this, when the radio text display mode is set in advance, the display control unit 13 has no character information until a character information reception start detection signal is input from the character information reception start detection unit 18. Is displayed. When the receiving station is an RDS station, the RDS data demodulation circuit 3 inputs the FM detection signal, demodulates the RDS data, and outputs it to the system controller 10. Each time the RDS data is input, the character input processing unit 15 of the system controller 10 checks whether the group type code of the RDS data format is 2, and the A / B identification flag is A or B, and the radio text format data ( 15)), the character information in the RDS data is judged on a character-by-character basis to see if it matches the previously received character with the same character number. It is temporarily stored in the address corresponding to the character number in the memory unit 12. The reception buffer memory unit 12 is cleared by the control unit 12 when the reception frequency is changed, and then the character input processing unit 15 stores the character as the RDS data is received. The character information reception start detection unit 18 checks whether or not the reception of the character information has started depending on the presence or absence of the character at the address 1 in the reception buffer memory unit 12, and since the character is stored at the head address of the reception buffer memory unit 12, When it is detected that the reception of the character information is started, the character information reception start detection signal is output to the display control unit 13.

When the radio text display mode is set in advance, the display control unit 13 which receives the character information reception start detection signal transfers the contents of the reception buffer memory unit 12 to the display buffer memory unit 14. And the timer unit 1
Repeat 6 times for 500ms. Timer unit 16
Every time the timer counts 500 ms, the scroll counter unit 17 counts up, and based on the count value of the scroll counter unit 17, the display control unit 13 determines whether the character information stored in the display buffer memory unit 14 Display part 2 of the character information so that the character with the character number indicated by the count value of the scroll counter unit 17 is in the first digit.
To scroll to. Then, when the scroll display is completed up to the last character stored in the display buffer memory unit 14, the contents of the reception buffer memory unit 12 are transferred to the display buffer memory unit 14 again,
The scroll display is performed based on the information stored in the display buffer memory unit 14.

By the way, when the user presets the current reception frequency to a desired channel, the control section 11 presets the current reception frequency to the designated channel. During this preset registration operation, it is necessary to display the channel number and the reception frequency.
If this information is displayed by a display device different from the display device 2 that displays the radio text character information, a large display space is required and the circuit configuration becomes complicated. Therefore, when the preset registration operation is performed while the character information of the radio text is scroll-displayed on the display unit 2, the control unit 11 gives the interrupt display request and the interrupt display information to the display control unit 13, and receives the channel number and the reception number. The frequency is temporarily displayed on the display unit 2, and after a lapse of a certain time, the interrupt display request is canceled and the radio text scroll display is resumed.

[0008]

However, in the above-mentioned prior art, as shown in FIG.
Preset registration to channel 5 during scroll display of radio text consisting of 26 characters received from 6.5 (MHz) RDS station (here, 26 characters of radio text are replaced with alphabets a to z) Since the operation was performed, set the channel number and reception frequency to "5.
106.5 ”, the scroll counter unit 17 continues to count up during the interrupt display, and the interrupt display request is stopped. Therefore, when the scroll display of the original radio text is resumed, immediately before the interrupt display. Character information that is not continuous with the character information that was scroll-displayed is displayed, and there is a gap with the character information that the user was looking at earlier, and the content of the character information after scroll display is restarted becomes unclear. There was a problem.

In view of the above-mentioned prior art, the present invention is such that when certain character information is scroll-displayed, other information is temporarily interrupted and then scrolled again, the character is displayed immediately after the scroll display is restarted. The purpose is to provide a scrolling display method that can understand the content of information.

[0010]

SUMMARY OF THE INVENTION In one aspect of the present invention, a range of a part of character information is usually shifted based on the character information for scroll display stored in a storage means while shifting a predetermined unit at a constant time interval. Scrolls the characters in the display means, and when the interrupt display request is generated, the interrupt display information is temporarily displayed in the display means, and when the interrupt display request is released, the original scroll display is resumed. The display method is characterized in that when the interrupt display request is canceled and the original scroll display is restarted, the scroll display is restarted following the scroll display state immediately before the interrupt display request is generated.

According to another aspect of the present invention, when the interrupt display request is canceled and the original scroll display is resumed, an arbitrary number of units are traced back from the scroll display state immediately before the interrupt display request is generated. The feature is that the scroll display is performed from the state.

In still another embodiment of the present invention, when the interrupt display request is released and the original scroll display is resumed, the scroll display character information stored in the storage means is displayed from the beginning. It is characterized by

[0013]

According to one aspect of the present invention, when the interrupt display request is released and the original scroll display is resumed, the scroll display is resumed following the scroll display state immediately before the interrupt display request is generated. Therefore, the scroll display interrupted in the middle can be seen from the character information continued from the previous time, and the character information that has not been seen can be quickly known without any omission.

According to another aspect of the present invention, when the interrupt display request is canceled and the original scroll display is resumed, scrolling is performed from a state slightly before the scroll display state immediately before the interrupt display request is generated. Since I tried to display it, it was interrupted in the middle, so even if you do not know the contents of the scroll display you saw last time, you can check the contents again and quickly know the character information you have not seen yet. You can

According to still another aspect of the present invention, when the interrupt display request is canceled and the original scroll display is resumed, the scroll display character information stored in the storage means is scroll-displayed from the beginning. So I did
It is possible to surely know all the character information provided in the scroll display from the beginning.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a circuit diagram of an RDS-compatible FM radio receiver embodying the scroll display method of the present invention with a part thereof omitted. The same components as those in FIG. 16 are designated by the same reference numerals. Reference numeral 21 is an antenna, 22 is a front end for extracting a reception signal of a desired broadcasting station from an antenna reception signal, converting it to an intermediate frequency signal and outputting it, 23 is an intermediate frequency amplifier circuit for band limiting and amplifying the intermediate frequency signal, 24 receives the intermediate frequency signal from the intermediate frequency amplifier circuit 23 and receives FM
An FM detection circuit for performing detection, 25 is an MPX for extracting a stereo audio signal from the FM detection signal, and 3 is an RDS data demodulation circuit for demodulating FM-multiplexed RDS data from the FM detection signal and extracting radio text format data. 1A is frequency up and down keys for manual tuning operation, channel keys (ten keys) for preset tuning operation and preset registration operation, memory keys for preset registration operation, and radio text display mode and frequency display for display mode. It is an operation panel having a display key for switching to a mode.

Reference numeral 10A is a system controller having a microcomputer configuration, and a manual tuning operation on the operation panel 1A,
Perform manual tuning control and preset tuning control according to the preset tuning operation. In addition, according to the display mode switching operation, the radio text display mode and the frequency display mode are switched, and the display unit 2 scrolls the character information of the radio text, the received frequency display (in the manual tuning mode), or Display the channel number and received frequency (in preset tuning mode). Also,
During radio text display mode, manual tuning operation,
When preset tuning operation and preset registration operation are performed,
With the interrupt display, after displaying the receiving frequency during manual tuning operation and the channel number and receiving frequency during preset tuning operation and preset registration operation for a certain period of time,
Cancel the interrupt display and return to the original display state again.

The system controller 10A has substantially the same configuration as the system controller 10 shown in FIG. The reception buffer memory unit 12 has a storage area of 64 characters from addresses 1 to 64, and the display buffer memory unit 14 has a storage area of 64 + 8 characters from addresses 1 to 72. Regarding the mode switching, the control unit 11A controls the display mode switching according to the display mode switching operation, sets the preset channel selection mode when the preset registration operation and the preset channel selection operation are performed, and the manual channel selection mode when the manual channel selection operation is performed. And Then, preset registration control is performed according to the preset registration operation, and when the display mode is frequency, the display control unit 1
The display information of the channel number and the reception frequency is given to 3A and displayed on the display unit 2. When the display mode is radio text, the first interrupt display request is generated and the display control unit 1
3A is given the first interrupt display request and the interrupt display information of the channel number and the reception frequency, and is displayed on the display unit 2 for a certain period of time. Then, the first interrupt display request is released and the scroll display of the original radio text is displayed. Let it continue. Here, the first interrupt display request is a display request for returning to the scroll display state of the original radio text after canceling the interrupt display request.

The control unit 11A performs tuning control (preset tuning control or manual tuning control) with respect to the front end 22 according to a manual tuning operation or a preset tuning operation, and when the display mode is frequency, the display control unit. The display information of the receiving frequency (in the manual tuning mode) or the channel number and the receiving frequency (in the preset tuning mode) is given to 13A and displayed on the display unit 2. When the display mode is radio text, the reception buffer memory unit 12 is cleared, a second interrupt display request is generated, and the display controller 13A receives the second interrupt display request and the reception frequency (in the manual tuning mode). )
Alternatively, the interrupt display information of the channel number and the reception frequency (in the preset channel selection mode) is given to display the display 2 for a certain time and the display buffer memory unit 14 is cleared, and then the second interrupt display request is released, To start scrolling display of radio text from various receiving stations. Here, the second interrupt display request is a display request for stopping the scroll display of the original radio text after canceling the interrupt display request and performing the scroll display of the radio text from the new receiving station.

When the display mode is frequency, the display control unit 13A controls the display of the display device 2 based on the display information input from the control unit 11A. Further, when the display mode is radio text and the first or second interrupt display request is released, when the character information reception start detection unit 18 detects the reception start of the character information, and the timer unit 16 sets a predetermined time T. = Whenever the time measurement of 500ms is completed, the character information is transferred from the reception buffer memory unit 12 to the display buffer memory unit 14, and the scroll counter unit is executed each time the timer unit 16 completes the time measurement of 500ms. 17A is counted up from the initial value 0, and in the display buffer memory unit 14, the count value of the scroll counter unit 17A +
The character stored in the address 1 is made to come to the first digit of the display 2, and a partial range of the character information of the radio text is scroll-displayed on the display 2.

Although the display mode of the display control section 13A is radio text, the
When the interrupt display request and the interrupt display information are received, the display information is displayed on the display unit 2. At this time,
The count-up operation of the scroll counter unit 17A is temporarily stopped. When the first interrupt display request is released, the count-up operation of the scroll counter unit 17A is restarted, and the scroll display is restarted so as to continue the display state before the first interrupt display request is generated. As a result, the scroll display interrupted in the middle can be seen from the character information following the previous time, and the character information that has not been seen can be quickly known without omission. Although the display mode is radio text, when the second interrupt display request and the interrupt display information are received from the control unit 11A, the display control unit 13A causes the display unit 2 to display the interrupt display information. The buffer memory unit 14 is cleared. When the second interrupt display request is released, the character information reception start detection unit 18 detects the start of receiving the character information, and then starts the scroll display based on the character information received from the new station.

The other components of the system controller 10A are constructed in exactly the same way as in FIG.

Next, the operation of this embodiment will be described with reference to FIGS. 2 to 10 are flowcharts showing the operation of the system controller 10A, and FIGS. 11 to 13 are explanatory views of the scroll display operation. When the power of the set is turned on, the system controller 10A performs a predetermined initialization process, the control unit 11A performs tuning control on the front end 22, and tunes to the broadcasting station that was received immediately before the power was turned off. The display mode and tuning mode are also set to the status immediately before the last power-off. When the power is turned on, the reception buffer memory unit 12 and the display buffer memory unit 14 are cleared (step 50 in FIG. 2). Here, it is assumed that the radio text display mode and the manual channel selection mode are set, and the reception frequency is set to 106.5 (MHz).

Radio text display mode When the radio text display mode is entered, the display control unit 13A
First causes the display device 2 to display a message "NO RT" indicating that there is no character information (steps 51, 52, 57, see FIG. 11 (1)). Frequency 1
When 06.5 (MHz) is the RDS station, the RDS data demodulation circuit 3 demodulates the RDS data from the FM detection signal output from the FM detection circuit 24, and the system controller 10
Output to A. System controller 10A is RDS
Every time the RDS data is input from the data demodulation circuit 3, the interrupt processing shown in FIG.
Checks the group type code and A / B identification flag, the format data entered this time is the type 2A group or type 2B related to the radio text.
It is determined whether or not it belongs to the group (step 130), and it is determined whether or not each character included in the format data related to the radio text input this time matches the character of the same character number received last time on a character-by-character basis, and it matches. If you want to
It is temporarily stored in the address corresponding to the character number in the reception buffer memory unit 12 (step 131). The current receiving station is transmitting a text consisting of 26 characters (hereinafter, 26 characters of the text are replaced with alphabets a to z for explanation), the first time is correctly received from w, and the second and subsequent times are correctly received. Reception buffer memory unit 4
Characters are stored in the order of w, x, y, z, a, b, ... (See FIGS. 11 (2) to 11 (4)).

When "a" is stored in the head address of the reception buffer memory section 12, the character information reception start detection section 18 outputs a character information reception start detection signal to the display control section 13A. When the display control unit 13A inputs the character information reception start detection signal, the count value i of the scroll counter unit 17A
Is cleared to 0 (steps 52 and 53). Then, the character information stored in the addresses 1 to 64 of the reception buffer memory unit 12 is transferred to the addresses 1 to 1 of the display buffer memory unit 14.
64, and at this time, a value obtained by adding 8 to the character number (26 in this case) of the last character in the character information transferred this time is registered as the final number TXT (M), and the display buffer memory The symbol code of "-" is stored at addresses (here, addresses 27 to 34) one to eight after the last character of the part 14 (steps 54 to 56, FIG. 11).
(3)).

Subsequently, the display control unit 13A selects the address (i) from the character information stored in the display buffer memory unit 14.
Eight characters in the range of address (i + 1-8) to address (i + 1) are displayed on the display 2 so that the character +1) is the first digit of the display 2 (step 60 in FIG. 3). Since the address does not come before 1, the address 0 is the address {TXT (M)} and the address -1 is the address {TX.
T (M) -1} is processed before address 1 following address {TXT (M)}, and similarly after address {TXT (M)} is processed following address 1.
"--------"-a is displayed on the display unit 2 (Fig. 1
1 (3)). After that, set the timer unit 16,
Start timing of 500 ms (step 61). And
Whether the timer unit 16 has timed out (step 62),
It is checked whether the memory key of the operation panel 1A is pressed, the up key or the down key is pressed, the channel key is pressed, or the display key is pressed (step 97) (step 62, step 70 of FIG. 4). , Step 80 of FIG. 5, step 90 of FIG.
97). During this period, the characters after b are also stored in the reception buffer memory unit 12 (see FIG. 11 (4)).

When the timer section 16 times out without any key operation, the display control section 13A increments the count value i of the scroll counter section 17A to 1
Sushi (steps 62 and 63 in FIG. 3), i = TXT
It is checked whether (M) = 34 (step 64), and if NO, the process returns to step 54, and the character information is transferred from the reception buffer memory unit 12 to the display buffer memory unit 14 again. At this time, the character information is transferred. A value obtained by adding 8 to the character number (here, 26) of the last character in the character information is registered as the final number TXT (M), and the display buffer memory unit 14
The symbol code of "-" is stored in the addresses (here, addresses 27 to 34) one to eight after the last character of () (steps 55 and 56).

Subsequently, the display control unit 13A selects the address (i) from the character information stored in the display buffer memory unit 14.
Eight characters in the range of address (i + 1-8) to address (i + 1) are displayed on the display 2 so that the character +1) becomes the first digit of the display 2 (step 60). When the data is transferred from the reception buffer memory unit 12 to the display buffer memory unit 14, since the second character b is already included, the display unit 2 displays "------ ab" (FIG. 1).
2 (1)). Then, the timer unit 16 is set again to start counting the time of 500 ms (step 61). When the timer unit 16 has timed out, i = 2 is set, and i = 34 is not yet established. Therefore, the process returns to step 54 and the same process is repeated (steps 62 to 64 in FIG. 3).

As a result, since the characters are additionally stored in the reception buffer memory unit 12 much faster than the scrolling speed, immediately after the start of receiving the character information, as shown in FIG.
As shown in (4), (1) and (2) of FIG. 12, the character information without omission is scroll-displayed. Therefore,
Don't get confused with the meaning or misunderstand it as a set failure. After that, when the character z is displayed in the eighth digit of the display unit 2 (see FIG. 12 (3)), the next display is “-
---------- "(see Fig. 12 (4)), it can be seen that the display of a series of character information has been completed once. After that, when the timer unit 16 times out, the count value i of the scroll counter unit 17A is set to 34, so the display control unit 13A determines YES in step 64, and at this time, the scroll counter unit 17A is cleared and i = After setting to 0 (step 65), the process proceeds to step 54. Therefore, the scroll display starts again from the beginning of the character information, as shown in FIGS. 11 (3), 11 (4) and 12 (1).

First interrupt display request When the scroll display continues in this way, and the display becomes "fghijklm" as shown in FIG. 13 (1) at some point (i = 12), the user is in the current state. Receive frequency 5
When the memory key is pressed for preset registration in the channel, the control unit 11A enters the preset registration mode, generates the first interrupt display request and gives it to the display control unit 13A, and displays C and H for the sixth and fifth digits. Output character data. Upon receiving the first interrupt display request, the display control unit 13A suspends the scrolling display of the radio text, displays "CH" on the display unit 2 based on the display character data input from the control unit 11A, and waits for channel input. (Step 7 of FIG. 4)
0, 71, see FIG. 13 (2)).

When the user presses the channel key 5, the control section 11A displays the current reception frequency 10 on the channel 5 of the built-in channel memory (not shown).
6.5 (MHz) is preset (step 73), the tuning mode is changed to the preset tuning mode, and the display control unit 13A
The channel number 5 for the 7th digit and the reception frequency 106.5 for the 4th digit to the 1st digit are output as display character data. Based on the display character data, the display control unit 13A displays "5 106.5" to indicate to the user that the reception frequency 106.5 (MHz) is registered in channel 5 (steps 74, 75, FIG. 13 ( See 3)). After waiting 5 seconds, the control unit 11A cancels the first interrupt display request to the display control unit 13A.

Until the first interrupt display request is generated and canceled, the display control unit 13A ignores the time-up of the timer unit 16 and suspends the count-up process for the scroll counter unit 17A. And the first
When the interrupt display request is canceled, the process returns to step 62 to check whether the timer section 16 has timed up. However, since it has already timed up, i is incremented (step 63, i = 13). , I = 34 (step 64), the character at the address (i + 1) of the character information stored in the display buffer memory unit 14 through the processing of steps 54 to 56 becomes the first digit of the display 2. Address (i + 1-8) to address (i
Eight characters in the range of +1) are displayed on the display device 2 (step 60). Hereinafter, the processing of steps 61 to 64 and 54 to 60 is repeated.

As a result, the radio text scroll display is resumed again, and immediately after the first interrupt display request is released, the display state "fghijklm" immediately before the first interrupt display request is issued is immediately followed. "Gh
ijklmn ”, the scroll display interrupted in the middle can be seen from the character information following the previous time, and the character information that has not been seen can be quickly known without omission (see FIG. 13 (4)). ). In the radio text display mode, when the preset registration operation is performed when the reception start of the character information is not yet detected, YES is determined in step 100 of FIG. 7, and steps 70 to 76 are performed in step 104. After performing exactly the same preset registration processing, the process returns to step 52 in FIG.

When a manual tuning operation is performed during the second interrupt display request scroll display, the control section 11A performs manual tuning control on the front end 22 in accordance with the operation to enter the manual tuning mode, and the reception buffer memory section. 12 is cleared, and the second interrupt display request and the current reception frequency are given to the display control unit 13A. Upon receiving the second interrupt display request, the display control unit 13A clears the display buffer memory unit 14 and causes the display 2 to display the reception frequency (steps 80 to 85 in FIG. 5). When the manual tuning operation continues, the control unit 11A performs the manual tuning control and displays a new reception frequency (step 86,
87, 85), the second interrupt display request is canceled when the manual tuning operation stops and 5 seconds elapse (step 8).
6, 88). At this time, the display control unit 13A returns to step 52 of FIG. 2 and once the display unit 2 displays “NO RT
Is displayed (step 57), and when radio text is received from a new station, scroll display is started (YES in step 52). In the radio text display mode, when the manual tuning operation is performed when the start of receiving the character information is not yet detected, step 10 in FIG.
It is determined to be YES in step 1 and step 80 to step 80-
After performing the same manual channel selection processing as 88,
Return to step 52 of.

Similarly, when a preset tuning operation is performed during scroll display, the control section 11A performs preset tuning control on the front end 22 according to the operation.
The preset channel selection mode is set, and the reception buffer memory unit 12
Is cleared, the display controller 13A is supplied with a second interrupt display request and display character data indicating the channel number and the reception frequency, and the display buffer memory 14 is cleared and the channel number and the reception frequency are displayed (FIG. 6).
90-95). After 5 seconds, the second interrupt display request is canceled (step 9).
6). Then, the display control unit 13A causes the display control unit 13A to perform step 52 in FIG.
Then, "NO RT" is once displayed (step 57), and when radio text is received, scroll display is started (YES in step 52). When the preset channel selection operation is performed when the reception start of the character information is not detected, YES is determined in step 102 of FIG. 7, and the same preset channel selection processing as in steps 90 to 96 is performed in step 106. , Step 5 of FIG.
Return to 2.

Frequency display mode When the display switching operation is performed by pressing the display key while the radio text is scrolling displayed or the start of receiving the character information is not yet detected, the control section 11A switches to the frequency display mode and sets. (Steps 97, 98 in FIG. 6 or Step 103 in FIG. 7,
107). At this time, the control unit 11A displays the reception frequency in the manual channel selection mode and the channel number and the reception frequency in the preset channel selection mode.
Give to. In the frequency display mode, the display control unit 13A causes the display unit 2 to display the reception frequency (manual channel selection mode) or the channel number and the reception frequency (preset channel selection mode) input from the control unit 11A (step 51 in FIG. 2). , Step 110, 111 or 112 in FIG. 8).

When the preset registration operation is performed in the frequency display mode, when the memory key is pressed, the control section 11A gives predetermined display character data to the display control section 13A to display the channel input waiting state (step 1).
13, 114, see FIG. 13 (2)), when a desired channel key is pressed, preset channel selection mode is set (steps 115 to 117), and display character data indicating the channel number and the reception frequency is given. Display (step 51 in FIG. 2, step 110 in FIG. 8, 1
12, see FIG. 13 (3)). When the manual tuning operation is performed, the manual tuning control is performed to set the manual tuning mode, and the reception buffer memory unit 12 is cleared (steps 118 to 121). In addition, the display control unit 13A
To clear the display buffer memory section 14 (step 122), and display character data indicating a new reception frequency to be displayed (step 51 in FIG. 2, steps 110 and 111 in FIG. 8).

When the preset channel selection operation is performed in the frequency display mode, preset channel selection control is performed to set the preset channel selection mode, and the reception buffer memory unit 12 is cleared (steps 120 to 123 in FIG. 9). Further, the display control unit 13A is instructed to clear the display buffer memory unit 14 (step 124), and display character data indicating a new reception frequency is given and displayed (step 51 of FIG. 2, step of FIG. 8). 110, 112). When the display mode switching operation is performed in the frequency display mode, the original radio text display mode is restored (step 12 in FIG. 9).
5, 126), and the processes after step 52 of FIG. 2 are performed in the same manner as described above.

When the control section 11A has a clock function, when the user presses the time key provided on the operation panel 1A while scrolling the character information, the control section 11A issues a first interrupt display request. ,
The first interrupt display request and the display character data indicating the current time are given to the display control unit 13A, and the display control unit 1A
The scroll display is temporarily stopped at 3A, the count-up operation of the scroll counter unit 17A is also temporarily stopped, and the current time is displayed on the display unit 2. After a lapse of a fixed time, the control unit 11A releases the first interrupt display request, and the display control unit 13A is stored in the display buffer memory unit 14 so as to continue the scroll display state immediately before the first interrupt display request is generated. The scroll display based on the character information may be restarted.

In the above embodiment, after step 76 in FIG. 4, the process proceeds to step 62 in FIG. 3 as it is. However, after step 76, the display control unit 13A sends the count value to the scroll counter unit 17A. If an arbitrary constant (for example, 1, 4, 7, etc.) is subtracted from i, the process proceeds to step 62 (however, if the count value becomes a certain negative value k as a result of the subtraction, i = TXT (M)
+ K), when the first interrupt display request is canceled and the original scroll display is resumed, the scroll display state immediately before the first interrupt display request occurs or the position traced back by an arbitrary number of units Since you can restart the scroll display of character information from, you can check the contents again even if you do not know the contents of the scroll display that you were seeing last time, and you can quickly check the character information that you have not yet seen. You can know The display state when the first interrupt display request is generated is shown in FIG.
If it is (1) and the subtraction number is 1, the display state immediately after the first interrupt display request is released is as shown in FIG.
When the subtraction number is 4, the result is as shown in FIG.

After step 76 in FIG. 4, the process may proceed to step 65 in FIG.
When the interrupt display request of is canceled and the original scroll display is resumed, since the scroll display can be performed from the beginning of the character information stored in the display buffer memory unit 14, all of the character information provided in the scroll display can be performed. You can definitely know from the beginning.

Further, in the above-mentioned embodiment, the scroll display is made so as to be shifted by one character at a constant time interval. However, when a dot matrix type display is used, a half character at a constant time interval, The same can be applied to the case where scroll display is performed while shifting in units of 1/4 character or the like. Further, the application target of the present invention is RD
It is not limited to the S compatible FM radio receiver,
A device that scrolls and displays the character information stored in a predetermined storage means such as a predetermined display buffer memory, for example, a VICS (road traffic information system) compatible FM radio receiver, an MD player, a video CD player, and a pager. , A graphic equalizer, an AV amplifier, and the like.

[0043]

According to one aspect of the present invention, when the interrupt display request is canceled and the original scroll display is resumed, the scroll display is resumed following the scroll display state immediately before the interrupt display request is generated. Therefore, the scroll display interrupted in the middle can be seen from the character information following the previous time, and the character information that has not been seen can be quickly known without any omission.

According to another aspect of the present invention, when the interrupt display request is canceled and the original scroll display is resumed, only an arbitrary number of units in the scroll display state immediately before the interrupt display request is generated. Since the scroll display is performed from the state of going back, it was interrupted in the middle, so even if you do not understand the contents of the scroll display you saw last time, you can check the contents again and you have not seen it yet. Text information can be known quickly.

According to still another aspect of the present invention, when the interrupt display request is canceled and the original scroll display is resumed, the scroll display character information stored in the storage means is scroll-displayed from the beginning. So I did
It is possible to reliably know all of the character information provided in the scroll display.

[Brief description of drawings]

FIG. 1 illustrates an R embodying a scroll display method according to the present invention.
It is the circuit diagram which abbreviate | omitted a part of FM radio receiver corresponding to DS.

FIG. 2 is a flowchart showing the operation of the system controller.

FIG. 3 is a flowchart showing the operation of the system controller.

FIG. 4 is a flowchart showing the operation of the system controller.

FIG. 5 is a flowchart showing the operation of the system controller.

FIG. 6 is a flowchart showing the operation of the system controller.

FIG. 7 is a flowchart showing the operation of the system controller.

FIG. 8 is a flowchart showing the operation of the system controller.

FIG. 9 is a flowchart showing the operation of the system controller.

FIG. 10 is a flowchart showing the operation of the system controller.

FIG. 11 is an explanatory diagram of a scroll display method.

FIG. 12 is an explanatory diagram of a scroll display method.

FIG. 13 is an explanatory diagram of a scroll display method.

FIG. 14 is an explanatory diagram of a modified example of the scroll display method.

FIG. 15 is an explanatory diagram of a data format of radio text in RDS.

FIG. 16 is a circuit diagram of a system controller of a conventional FM radio receiver compatible with RDS.

FIG. 17 is an explanatory diagram of a problem in conventional scroll display.

[Explanation of Codes] 1A Operation Panel 2 Display 3 RDS Data Demodulation Circuit 10A System Controller 11A Control Section 12 Reception Buffer Memory Section 13A Display Control Section 14 Display Buffer Memory Section 15 Character Input Processing Section 16 Timer Section 17A Scroll Counter Section 18 Characters Information reception start detector

Claims (3)

[Claims] 1. Normally, based on the character information for scroll display stored in the storage means, characters in a partial range of the character information are scroll-displayed on the display means while shifting by a predetermined unit at regular time intervals, and interrupted. When a display request occurs, the interrupt display information is temporarily displayed on the display means, and when the interrupt display request is released, the original scroll display is restarted. A scroll display method characterized in that when the original scroll display is restarted, the scroll display is restarted following the state immediately before the interrupt display request was generated. 2. Normally, based on the character information for scroll display stored in the storage means, characters in a partial range of the character information are scroll-displayed on the display means while shifting by a predetermined unit at regular time intervals, and interrupted. When a display request occurs, the interrupt display information is temporarily displayed on the display means, and when the interrupt display request is released, the original scroll display is restarted. The scroll display method is characterized in that when the original scroll display is restarted, the scroll display is performed from a state where the scroll display state immediately before the interrupt display request is generated is traced back by an arbitrary number of units. 3. Normally, based on the character information for scroll display stored in the storage means, characters in a partial range of the character information are scroll-displayed on the display means while shifting by a predetermined unit at regular time intervals, and interrupted. When a display request occurs, the interrupt display information is temporarily displayed on the display means, and when the interrupt display request is released, the original scroll display is restarted. When resuming the original scroll display, the scroll display is performed from the beginning of the character information for scroll display stored in the storage means.