JPH085511Y2 - Display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a display device that displays a number of two or more digits by using a one-digit number display.

(B) Conventional technology Many electronic / electrical devices are equipped with indicators for displaying numbers, and provide information on a specific number to the user visually to improve operability. On the market. For example, in an automatic music selection device in a tape recorder, the music number of a music selection is set and displayed on the display, and the number displayed on the display each time a silent part between music is detected by the music selection operation. Gradually decreased to "0"
At the same time, the music selection operation is stopped, and the user is notified of the end of the music selection operation by the number displayed on the display. As a technique relating to a display device that performs such an operation, there is, for example, one disclosed in Japanese Utility Model Laid-Open No. 61-16790. Further, some answering machine devices are also equipped with a display device for counting the number of recordings of incoming messages and displaying the counted number on a display to inform the user of the number of recordings of incoming messages.

(C) Problems to be solved by the invention In the display device described above, at least a 7-segment LED display or the like as a display for displaying a single digit number is generally used.
It is equipped with 3 or 3 pieces, and usually does not display 2-digit or 3-digit numbers, but sometimes it is necessary to display 2-digit or 3-digit numbers.
I am prepared for that time. Therefore, the display part of the display device is large, and there is a problem that the installation position of the display device cannot be freely determined in some electronic / electrical devices. Further, it is useless to provide two or three 7-segment LED displays because it is necessary for displaying numbers although it is rarely used. In order to solve such a problem, the present invention provides a display device for displaying a 2-digit number by using a 1-digit number display.

(D) Means for Solving the Problems The display device of the present invention is configured to display a one-digit number by a light emitting operation of a plurality of light emitting elements and a light emitting operation of a plurality of light emitting elements of the display. An indicator drive circuit to control,
Display information detection means for detecting the information of the numbers to be displayed,
A first display signal transmitting circuit for transmitting a first display signal by receiving information corresponding to the first digit to be displayed from the display information detecting means, and a second display signal transmitting circuit for displaying from the display information detecting means. A second display signal transmitting circuit for transmitting a second display signal by receiving information corresponding to the digit of the digit,
A switching operation for applying a first display signal from the first display signal transmission circuit to the display drive circuit and then applying a second display signal from the second display signal transmission circuit to the display drive circuit And means.

(E) Operation In the present invention, when the numeral to be displayed is a two-digit numeral, the numeral of each digit of the numeral is displayed by the first display signal sending circuit and the second display signal sending circuit as the first display signal and the second display signal. In addition to outputting as a signal, each display signal is sequentially added to the display drive circuit by the switching operation of the switching means, whereby the numbers are sequentially displayed on the display and the number display by the first display signal and the number display by the second display signal are performed. The non-display time between the numerical display by the second display signal and the numerical display by the first display signal is made longer than the non-display time between and, and the display operation is repeated.

(F) Embodiment An embodiment of the display device of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram showing a display device of the present invention which is added to an answering machine to display a count of incoming messages. FIG. 2 is a simple flowchart of the display operation of the display device of the present invention. FIG. 6 is a diagram showing a time lapse of a display operation of the display device of the present invention. First, in FIG. 1, (1)
Is a telephone line, (2) is a connection terminal, and (3) is an answering machine, which is connected to the telephone line (1) through the connection terminal (2). (4) is an incoming message detecting circuit that outputs a detection output pulse when the answering machine (3) receives an incoming message from the telephone line (1) and the incoming message is stored, and (5) is the incoming message detecting circuit. (4)
A count circuit for counting the number of detection output pulses issued by the control circuit. (6) is a control circuit which performs a control operation corresponding to the number counted by the count circuit (5) and is activated when a two-digit count number is detected. Clock circuit (7)
The clock circuit (7) is activated, and the first switching signal is output when approximately 450 ms has elapsed, the second switching signal is output when approximately 550 ms has elapsed, and the third switching signal is output when approximately 1 s has elapsed and the timer circuit (15 ) Is reset. Reference numeral ( 8 ) is a display signal sending circuit that receives information concerning the count number of the count circuit (5) from the control circuit (6) and sends the information as a display signal, in the present embodiment, the count number of the count circuit (5). Is a two-digit number, the information of the ten-digit number is received from the control circuit (6), converted into the first display signal and transmitted, and the information of the one-digit number. And a second display signal sending circuit (10) for receiving the signal from the control circuit (6), converting it to a second display signal, and sending it. ( 11 ) is a display for displaying a one-digit number and is composed of seven LEDs (11a) to (11g) (commonly called a 7-segment LED). (12) is the indicator ( 1
1 ) A display driving circuit for driving the display signal in response to the received display signal, and (13) driving the first display signal of the first display signal sending circuit (9) of the display signal sending circuit (8) for driving the display device. In addition to the circuit (12), the second display signal sending circuit (1
0) A switching circuit for switching whether to add the second display signal to the display drive circuit (12), and (14) is a switching operation control circuit for controlling the switching operation of the switching circuit (13). The circuit (13) is brought into a state in which the first display signal is applied to the display drive circuit (12), and the switching circuit (13) displays the display drive circuit by receiving the first switching signal from the control circuit (6). Make sure that you do not join (12),
By receiving the second switching signal, the switching circuit (13) is turned into the second circuit.
By switching to a state in which the display signal is applied to the display drive circuit (12) and receiving the third switching signal, the switching circuit (13) is switched to a state in which the display signal is not applied to the display drive circuit (12) and built-in. The switching operation control circuit (by activating the timer circuit (15) for about 700 ms, and outputting the output signal about 700 ms after the timer circuit (15) is activated. 14) returns to the initial state, the control circuit (6) receiving the output signal detects the count number of the count circuit (5), and restarts the display operation control.

The operation of the display device of the present invention, which is constituted by the above circuits and added to the answering machine, will be described below. First, when incoming messages from each caller are sequentially received by the answering machine (3) through the telephone line (1) -connecting terminal (2) and eight incoming messages are stored, 9
If the ninth message is stored, the incoming message detection circuit (4) detects the storage of the ninth incoming message and outputs a detection output pulse. As a result, in such a state, the counting circuit (5) increments the count number from "8" to "9". While the count circuit (5) counts up the count number to “9”,
The control circuit (6) recognizes that the count number is a single digit (100), and the first of the display signal transmission circuit ( 8 ) is detected.
Information for the number "9" is added to the display signal sending circuit (9), converted into the first display signal for "9" by the first display signal sending circuit (9), and added to the switching circuit (13).
In such a state, since the switching circuit (13) receives no switching signal from the control circuit (6) to the switching operation control circuit (14), the switching operation control circuit (14)
Holds the switching circuit (13) in a state in which the first display signal from the first display signal sending circuit (9) is applied to the display drive circuit (12). Therefore, the first display signal corresponding to "9" from the first display signal sending circuit (9) added to the switching circuit (13) is added to the display drive circuit (12), and the display drive circuit (12). The LED (11c) other than the LED (11c) of the display ( 11 ) responds to the received first display signal for "9".
a) An output signal is applied to (11b) and the LEDs (11d) to (11g) to cause the display ( 11 ) to display the number "9" (101). Then, it is assumed that the number "9" is continuously displayed on the display ( 11 ). In such a continuous state, if the tenth incoming message is received and stored in the answering machine (3), the incoming message detection circuit (4) detects the storage of the tenth incoming message,
Issue a detection output pulse. As a result, the count circuit (5) in such a state increments the count number from "9" to "10". The control circuit (6) recognizes that the count number is a two-digit number (100), while the count circuit (5) has increased the count number to "10", and the tens digit "1" is recognized. Information for the display signal transmission circuit ( 8 ) is added to the first display signal transmission circuit (9), and information for the unit digit "0" is added to the second display signal transmission circuit ( 8 ) of the display signal transmission circuit ( 8 ). In addition to 10), further activate the clock circuit (7). In such a state, the switching operation control circuit (14) outputs the first display signal to the display drive circuit (1
Since the switching circuit (13) is held so as to be added to 2), "1" sent from the first display signal sending circuit (9)
The first display signal for is applied to the display drive circuit (12) via the switching circuit (13), and the LED (11b) of the display (11),
An output signal from the display drive circuit (12) is added to (11c), the LEDs (11b) and (11c) of the display (11) emit light, and the display (11) displays "1". . Further, in such a state, the second display signal sending circuit (10) also produces a second display signal for "0" and sends it to the switching circuit (13). However, the second display signal is sent by the switching circuit (13). It is stopped and does not participate in the indicator drive circuit (12). When the clock circuit (7) is activated and about 450 ms elapses while the display operation is being performed, the control circuit (6) sends a first switching signal to the switching operation control circuit (14). . By such an operation, the switching operation control circuit (14)
Switches the switching circuit (13) so that the display signal is not applied to the display driving circuit (12) and puts the display (11) in the non-display state. Then, when it is assumed that about 550 ms has elapsed after the clock circuit (7) was started, the control circuit (6) sends a second switching signal to the switching operation control circuit (14). By such an operation, the switching operation control circuit (14) switches the switching circuit (13) so that the second display signal is applied to the display drive circuit (12),
"0" sent from the second display signal sending circuit (10)
The second display signal for is applied to the display drive circuit (12). Therefore, for about 100 ms, the display unit (11) that was in the non-display state emits light by receiving the output signal from the display unit drive circuit (12) to the LEDs (11a) to (11f) other than the LED (11g). "0" is displayed (102). When about 1 s has elapsed after the timepiece circuit (7) was activated, the control circuit (6) applies a third switching signal to the switching operation control circuit (14) and puts the timepiece circuit (7) into a reset state.
In such a state, the switching operation control circuit (14) responds to the reception of the third switching signal, activates the timer circuit (15), and causes the switching circuit (13) to display the display signal to the display drive circuit (12). Switch so that it is not added, and set the display (11) to the non-display state. The non-display state of the display (11) is about 700 m
When the timer circuit (15) performs a time-up of about 700 ms and outputs a time-up output signal and resets, the switching operation control circuit (14) returns to the initial state, and the switching circuit (13) outputs the first display signal. Switches to the state in which is added to the display drive circuit (12). Further, the time-up output signal of the timer circuit (15) is applied to the control circuit (6) to return the control circuit (6) to the initial state of the display operation control, and the count circuit (5) again detects the count number. Let When there is no change in the count number in such a state (100), the control circuit (6) activates the clock circuit (7) and the first display signal sending circuit (9) responds to "1" as in the above. In addition to the information, the information for "0" is added to the second display signal sending circuit (10), and the first display signal for "1" is sent from the first display signal sending circuit (9) to the second display signal sending circuit (10). The switching circuit (13) of the switching operation control circuit (14) corresponding to the switching signal from the control circuit (6) as described above by adding the second display signal for "0" to the switching circuit (13) from 10).
Display "1" on the display (11) by controlling
No display, “0” is displayed, then no display (102),
The display of "10" is repeated every 1.7 seconds. Further, when the control circuit (6) receives the time-up output signal and the count circuit (5) detects the count number, the count number is changed from "10" to "11" (100 ), The control circuit (6) activates the clock circuit (7), adds information for "1" to the first display signal sending circuit (9), and sends the first display signal for "1" to the switching circuit (13). Then, the information for "1" is added to the second display signal sending circuit (10), and the second display signal for "1" is added to the switching circuit (9). In such a state, the switching operation control circuit (1) corresponds to the count time of the clock circuit (7) of the control circuit (6) and the switching signal issued by the control circuit (6).
4) controls the switching circuit (13) and displays "1" on the display (11).
Is displayed, no display, "1" is displayed, and "11" is displayed in this order. Then, such an operation is repeatedly performed at intervals of 1.7 s until the count number changes.

(G) Effect of the device Since the display device of the present invention displays a two-digit number by a display device that displays a one-digit number, it is applied to an electronic device in which the shape of the display device cannot be increased. In this case, it has a great effect.

Further, according to the present invention, when the numeral to be displayed is a two-digit numeral, the numeral of each digit of the numeral is used as the first display signal and the second display signal by the first display signal sending circuit and the second display signal sending circuit. Each display signal is sequentially output to the display drive circuit by the switching operation of the switching means, thereby sequentially displaying the numbers on the display and simultaneously displaying the numbers by the first display signal and the numbers by the second display signal. Since the non-display time between the numerical display by the second display signal and the numerical display by the first display signal is made longer than the non-display time between them, the combination of two numbers can be easily made into one two-digit number. It has the effect of being readable. Further, the present invention has the advantage that the reading operation of the displayed numeral can be surely performed because the operation of displaying the numeral is repeated.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a circuit for displaying the count of incoming messages of an answering machine using one embodiment of the display device of the present invention, and FIG. 2 is a display of the display device in one embodiment shown in FIG. FIG. 3 is a flowchart showing the operation, and FIG. 3 is a diagram showing the passage of time with respect to the display operation of the display device in the embodiment shown in FIG. Description of main drawing numbers ( 8 ) …… Display signal sending circuit, ( 11 ) …… Display, (1
2) …… Display drive circuit, (13) …… Switching circuit, (14)
...... Switching operation control circuit.

Claims (1)

[Scope of utility model registration request] 1. A display device for displaying a one-digit number by a light emitting operation of a plurality of light emitting elements, and a display driving circuit for controlling a light emitting operation of a plurality of light emitting elements constituting the display device. Display information detecting means for detecting information of a power numeral, and a first display signal transmitting circuit for transmitting a first display signal by receiving information corresponding to the first digit of the number output from the display information detecting means. A second display signal transmitting circuit for transmitting a second display signal by receiving information corresponding to the second digit output from the display information detecting means, and transmitted from the first display signal transmitting circuit. After applying the first display signal to the display drive circuit, and after a first non-display time, add the second display signal sent from the second display signal sending circuit to the display drive circuit, and 1 second no longer than display time Become more display device and switching means for the first display signal sent from the first display signal sending circuit at between 示時 repeating the display changeover operation applied to the drive circuit.