JPH085512Y2 - Tape running display - Google Patents

Description

[Detailed Description of the Invention] [Outline] The tape running display that is easy to recognize is performed by the combination of the illuminated segment and the dimmed segment.

[Industrial application field]

The present invention relates to a tape running display device using a dimmed segment.

[Conventional technology]

When displaying a tape running on an audio device such as a cassette deck or a tape deck, for example, a display device in which 7-segment display elements (LED, liquid crystal display tube, etc.) are arranged in 3 digits or more as shown in FIG. Sometimes. In this tape running display, only the four segments c, d, e, g which are the left and right digits A and C and the bottom segment d of the central digit B are used, and are wound on the left and right reels as a whole. Indicates the shape of the magnetic tape.

There are various types of conventional tape running display devices as shown in FIG. (A) is a system in which all the segments are extinguished at the beginning of each cycle, the segments are lit one by one in the order of 1 to 9, and all the segments are lit at the end. In contrast to this, (b) is a method in which all the segments are turned on at the beginning of each cycle, turned off in the order of 1 to 9, and finally turned off all the segments. (C) is a method of turning off only one segment and changing the position of the extinguished segment in the order of 1 to 9 in each cycle. In this method, all the segments other than the unlit segment are turned on. (D) is a method in which the light-off segments of the left and right annular segments are simultaneously changed in the order of 1 to 4. Either method turns on or turns off 1,2,
3 ... corresponds to the running direction of the tape.

In each of the above-mentioned methods, by changing the lit segments indicated by diagonal lines and the unlit segments indicated by white spaces at regular intervals (corresponding to the tape speed), a dynamic running display that makes the tape look like it is actually running You can

[Problems to be solved by the device]

However, the methods of (a) and (b) are not always displayed as a whole, which is unnatural for tape running display. In this respect, the method of (c) or (d) is excellent. However, these methods have an unnatural feeling that the movement of the light-off segment has to be watched, and thus it may be difficult to intuitively determine that the tape is a running display. Also, especially in these methods, the state that all segments are lit indicates the tape shape,
It can be intuitively understood that the tape running display is displayed when all the segments are lit, but the more the number of light-off parts, the more the shape is deformed and the tape running display becomes harder to understand.

The present invention is based on the method shown in FIG. 4 (c) or (d), and is intended to realize an easy-to-understand tape running display by changing the light-off segment into a dimming segment.

[Means for solving the problem]

The present invention expresses the shape of the magnetic tape wound around the left and right reels by causing a predetermined one of the plurality of display segments to emit light, and sequentially drives and controls each of the plurality of display segments to change the running direction of the tape. In a tape running display device for displaying, a driving means for driving the plurality of display segments, and a driving means for driving a predetermined display segment of the plurality of display segments to dimming and driving the remaining display segments for lighting. It has a control means for controlling.

[Action]

By the above-described means, a predetermined display segment among the plurality of display segments is selectively turned on by dimming, and the tape running display is performed by turning on and dimming.

〔Example〕

FIG. 1 shows an example of the display method of the present invention. This example is based on the one segment extinguishing type of FIG. 4 (c), and the extinguishing segment is changed to a dimming segment. The dimming segment has its brightness set between the non-lighting segment and the lighting segment, and in the dynamic driving method, it can be realized by making the total driving time per driving cycle shorter than that of the lighting segment.

The position of this dimming segment is shown in Fig. 1 (1) to (9).
If you change it every fixed period according to the tape speed,
Dynamic display of tape running direction and speed can be performed while maintaining the overall shape of the tape. Moreover, since the dimming segment has brightness, the position thereof can be more positively indicated than in the conventional extinguished segment, and the display form can be intuitively understood.

In order to realize the display form as shown in FIG. 1, the drive waveform as shown in FIG. 2 may be created by software or hardware.

FIG. 3 is a diagram showing an example of a display device. Reference numeral 1 denotes a microcomputer, which has memories such as ROM and RAM inside and operates according to a program stored in these memories. A rotation sensor 2 is provided on the reel shaft of the tape player and outputs a signal indicating the drive state of the tape, and is composed of, for example, a magnet and a magnetic resistance element attached to the reel shaft. A driving circuit 3 turns on and off each segment according to a signal from the microcomputer 1. When the microcomputer 1 judges from the signal from the rotation sensor 2 that the tape player is in operation, it sends a signal to the drive circuit 3 to turn on / off each segment,
Controls dimming lighting. Next, the output signal to each segment will be described.

FIG. 2 shows the dimming of the segment c of the digit A and the dimming of the segment g separately for the left and right. The selection signals of the digits A to C are H (high) in the order of the minimum period.
become. When the digit selection signal becomes H, only the segment for which the segment selection signal is H emits light. The segment selection signal consists of digits A, B, and
Switch to the content corresponding to each of C, and repeat this with. In digit A, segments a, b, and f are always turned off, so their selection signals are always L (low).
It remains. On the other hand, the segments c, d, e, and g are subject to dynamic drive. During the dimming period of the segment c, since the segments d, e, and g are kept lit, these selection signals are H in the minimum period. On the other hand, the selection signal of the segment c is H in the minimum period,
L is set in the next minimum cycle.

In this way, if the minimum period to 1 drive cycle is set, the brightness of the segment c of the digit A is reduced to 1/2 of the lighting segments d, e, g. If the minimum cycle ~ is followed by the minimum cycle ~, and ~ is one driving cycle,
The brightness of the dimming segment c is 1/3 of the lighting segment (for example, ON for, OFF for, OFF) or 2/3 (ON for, O for
N, OFF).

If the A-c dimming pattern is repeated for a certain period (several 100 ms) and then switched to the Ag dimming pattern, segment c of digit A becomes a lighting segment, and segment g of digit A becomes a dimming segment instead. . This is the first
It means that the display of FIG. 1 is switched to the display of FIG. The Ag dimming pattern is a pattern in which the selection signals of the segments c and g in the Ag dimming pattern are exchanged.

Incidentally, in FIG. 2, only one representative lighting segment and extinguishing segment are shown. Further, during the period in which the segment of digit A is dimmed, only the segment d on the bottom side of digit B is turned on, and all of the annular segments c, d, e, g are turned on at digit C. The selection signal is set to H when the corresponding minimum period is reached.

[Effect of device]

As described above, according to the present invention, in a tape running display device that displays the running state of a magnetic tape in segments, the tape running display is performed while changing some of the segments into dimming segments in order for a certain period. Therefore, there is an advantage that the display form is easy for the user to see.

[Brief description of drawings]

 FIG. 1 is an explanatory diagram of a display method of the present invention, FIG. 2 is a time chart of a driving method of the present invention, FIG. 3 is a configuration diagram showing an example of a display device, and FIG. 4 is a conventional tape running display method. FIG.

Claims (1)

[Scope of utility model registration request] 1. A predetermined direction of a plurality of display segments is caused to emit light to express the shape of a magnetic tape wound on left and right reels, and each of the plurality of display segments is sequentially driven and controlled to run the tape. In the tape running display device for displaying, a driving unit for driving the plurality of display segments, a predetermined display segment among the plurality of display segments is driven to be dimmed, and the remaining display segments are driven to be turned on. A tape running display device having a control means for controlling the means.