JP2522487Y2 - Display device for recording direction of recording medium - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying the running direction of a recording medium in a device such as a cassette deck having a so-called auto-reverse function capable of automatically reversing the running direction of a recording medium.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a typical prior art display device 1 and its related electrical structure. The display device 1 is realized by a liquid crystal display device or the like, and is used, for example, in a magnetic tape reproducing device to display a reproducing direction of a magnetic tape. From the microcomputer 2 which controls a drive mechanism (not shown) such as a motor and an electromagnetic solenoid to reproduce a recording medium, a display output indicating a control state of the drive mechanism, that is, a reproduction direction of the magnetic tape is derived. After the output is decoded by the drive circuit 3, the output is applied to each of the segment electrodes 4, 5, and 6 in the display device 1 via lines L1, L2, and L3.
These segment electrodes 4 to 6 are arranged in a loop,
One end portions 4a and 5a of the segment electrodes 4 and 5 are formed in an arrow shape.

On the other hand, a common electrode 7 is arranged in the liquid crystal display device 1 so as to face the segment electrodes 4 to 6, and is connected to a ground line L4. Liquid crystal is sealed between the segment electrodes 4 to 6 and the common electrode 7, and when a voltage is applied to the segment electrodes 4 to 6, the transmittance and the reflectance of the liquid crystal change, thereby causing the running of the recording medium. The direction is displayed.

FIG. 6 is a view for explaining an example of display of the traveling direction. FIG. 6A shows a display example in the endless mode in which the reversing operation of the running direction is repeated, and all the segment electrodes 4 to 6 are driven for display. FIG. 6B shows a display example in the reverse mode in which the inversion operation is performed only once from the first direction to the second direction, and the segment electrodes 4 and 5 are driven for display. FIG. 6
(3) shows a display example in a one-way mode in which the vehicle travels only in the first direction, and only the segment electrode 4 is driven for display.

[0005]

In a recording medium reproducing apparatus using the above-described display device, it is desired to display a large amount of information such as a traveling time in addition to the traveling direction. However, the number of segments that can be displayed is limited due to restrictions on the number of ports of the microcomputer 2. Therefore, it is necessary to display individual information with as few segments as possible.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording medium traveling direction display device which can reduce the number of segments without deteriorating the display function and can be realized at a low cost with a simple configuration. It is.

[0007]

According to the present invention, at least one of recording and reproduction is performed by running a recording medium from a first direction to a second direction and from the second direction to a first direction again. In the display device of the running direction of the recording medium in a device capable of, a pair of display elements, which are divided into two parts in a loop shape and one end of each part is formed in an arrow shape, and the pair of display elements Display driving means for selectively driving, wherein the display driving means turns on one corresponding display element when the traveling direction of the recording medium is only the first direction or only the second direction, When the vehicle is traveling from the direction to the second direction, one of the elements is turned on and the other element is blinked corresponding to the traveling direction. , A display device in the running direction of the recording medium, characterized in that to light One of elements.

[0008]

According to the present invention, a reproducing apparatus for a recording medium such as a so-called auto-reverse deck reproduces a recording medium such as a cassette tape in a first direction from a first direction and in a second direction again from the second direction. At least one of recording and reproduction can be performed by running.

In such a device, in the present invention, the display device for displaying the traveling direction is realized by a liquid crystal display device or the like, and includes a pair of display elements and its display driving means. In the display element, two portions are combined in a loop shape, and one end of each portion is formed in an arrow shape, and is selectively driven by the display drive unit realized by a microcomputer or the like. You.

When the running direction of the recording medium is only the first direction or only the second direction, the display driving means turns on only one corresponding display element. When the vehicle travels from the first direction to the second direction, that is, when the vehicle reverses only once, one display element is turned on and the other display element is flashed in accordance with the traveling direction. Furthermore, when the vehicle travels repeatedly from the first direction to the second direction and further to the first direction, the two display elements are turned on.

As described above, the three traveling directions can be displayed by using the pair of display elements, and the place where three display elements were conventionally required can be reduced by one.
The number of ports of the microcomputer can be reduced, the configuration can be simplified, and a display device can be realized at low cost.

[0012]

FIG. 1 is a block diagram showing a display device 11 according to an embodiment of the present invention and an electrical configuration related thereto. The display device 11 is realized by a liquid crystal display device or the like, and is used for displaying a running direction of a magnetic tape in a magnetic tape reproducing device or the like. In response to an input operation from the input operation unit 26, the microcomputer 12
Drive control of the deck mechanism unit 22 is performed via the drive unit 1 to drive a magnetic tape as a recording medium to travel to reproduce an audio signal from a desired area. The frequency characteristics of the reproduced audio signal are adjusted by the equalizer 23, and then the power amplifier circuit 2
4 to the speaker 25 and is converted to acoustic.

A display output indicating the control state of the deck mechanism 22, that is, the reproduction direction of the magnetic tape is derived from the microcomputer 12, decoded by the drive circuit 13, and then displayed via the lines L11 and L12. 1
1 are applied to the respective segment electrodes 14 and 15. These segment electrodes 14 and 15 which are display elements
Are arranged in a loop, and the segment electrodes 14 and 15
Are formed in an arrow shape. On the other hand, in the display device 11, the common electrode 17 is arranged so as to face the segment electrodes 14 and 15, and is connected to the ground line L14.

FIG. 2 is an enlarged perspective view of the vicinity of the segment electrodes 14 and 15. A pair of mutually parallel glass substrates 2
On the inner surfaces of 7, 28, segment electrodes 14, 15 and common electrode 17 are formed, respectively. Liquid crystal is sealed between the substrate glasses 27 and 28 via an alignment film (not shown). When a voltage is applied between the segment electrodes 14 and 15 and the common electrode 17, the transmittance and the reflectance of the liquid crystal change, and thus the display of the traveling direction can be performed.

FIG. 3 is a view for explaining one display example of the traveling direction by the segment electrodes 14 and 15. FIG.
(1) shows a display example in an endless mode in which the reversing operation of the running direction is repeated, and the segment electrodes 14, 1
The display is driven so that 5 lights up together. FIG. 3B shows a display example in the reverse mode in which the inversion operation is performed only once from the first direction to the second direction. The display driving is performed so that the segment electrode 14 is turned on and the segment electrode 15 is blinked. Have been. Furthermore, FIG. 3 (3) shows the first
A display example in a one-way mode in which the vehicle travels only in the direction is shown, and display driving is performed so that only the segment electrodes 14 are turned on.

FIG. 4 is a diagram for explaining another display example of the traveling direction by the segment electrodes 14 and 15. FIG.
Display example in reverse mode shown in (2) and FIG.
In the display example in the one-way mode shown in (3), display driving is performed so that the segment electrodes on the different side from the display examples shown in FIG. 3 (2) and FIG. I have. That is, in the reverse mode, the display is driven so that the segment electrode 14 blinks and the segment electrode 15 is turned on.

By selectively using the lighting and blinking of the segment electrodes 14 and 15 as described above, three types of traveling modes can be represented. Therefore, the number of segment electrodes can be reduced, and the number of terminals associated therewith, the number of ports of the microcomputer 12, and the number of control circuits can be reduced.

The present invention is not limited to the liquid crystal, but may be realized by other display elements such as a fluorescent display tube.

[0019]

As described above, according to the present invention, these display elements are formed corresponding to the running direction of the recording medium by using a display element formed in a loop shape and having one end formed in an arrow shape. Since the elements are selectively turned on or off, the traveling direction can be displayed with a small number of segments. Therefore, the number of display elements can be reduced, the number of ports of a microcomputer or the like as a display driving means can be reduced, and the display of the running direction of the recording medium can be realized with a simple configuration at low cost.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a liquid crystal display device 11 according to an embodiment of the present invention and an electrical configuration related thereto.

FIG. 2 is an enlarged perspective view of the vicinity of segment electrodes 14 and 15;

FIG. 3 is a diagram for explaining a display example of a traveling direction according to the present invention;

FIG. 4 is a diagram for explaining another display example of the traveling direction according to the present invention.

FIG. 5 is a block diagram showing a typical conventional display device 1 and an electrical configuration related thereto.

FIG. 6 is a diagram for explaining a display example of a traveling direction according to the related art.

[Explanation of symbols]

 Reference Signs List 11 liquid crystal display device 12 microcomputer 13, 21 drive circuit 14, 15 segment electrode 17 common electrode

Claims (1)

(57) [Scope of request for utility model registration] A first direction extending from a first direction to a second direction;
In a display device of the running direction of the recording medium in a device capable of performing recording and / or reproduction by running the recording medium again in the first direction from the first direction, the recording medium is divided into two parts in a loop shape, A pair of display elements each having one end formed in an arrow shape, and display driving means for selectively driving the pair of display elements, wherein the display driving means is configured such that a traveling direction of the recording medium is If only the first direction or only the second direction, the corresponding 1
One of the display elements is turned on, and when traveling from the first direction to the second direction, one of the elements is turned on and the other element is blinked in accordance with the traveling direction. A display device for displaying the running direction of a recording medium, wherein two elements are turned on when the vehicle is running repeatedly in one direction.