JPS6053992A - Level display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a level display device suitable for use in displaying various levels in electronic equipment.

BACKGROUND TECHNOLOGY AND PROBLEMS Depending on the type of electronic equipment, it is necessary to display various levels and adjust them as necessary during use.For example, the recording level in a tape recorder and recording L-R. One example is balance or lineout level.

Naturally, these level adjustments require a dedicated level controller, but in recent years, these have been replaced by electronically controlled ones. This is one example.

By the way, 1. When using such an electronically controllable level adjuster, the level setting position is rarely fixed mechanically in response to the operation input, and therefore, the level setting position is not fixed mechanically with respect to the operation input. It is necessary to display the setting level.

However, this electrical level display requires a drive circuit and other related circuits in addition to the display.
As the number of types of levels to be displayed increases, the number of parts increases, resulting in a more complex circuit configuration, cumbersome handling, and higher costs.

OBJECTS OF THE INVENTION In view of the above points, it is an object of the present invention to provide a level display device that is inexpensive and has excellent operability, which can display the level of each pole with a simple configuration.

Summary of the Invention The present invention includes a plurality of electronically controllable level adjusters, an operation input means for controlling the plurality of level adjusters, and an operation mode according to an operation mode and an input from the operation input means. and display means for selecting and displaying the setting levels of the plurality of level adjusters, the number of parts of the display and the drive circuit is reduced and the configuration is simplified. At the same time, it is inexpensive and its operability is improved.

EXAMPLE Hereinafter, an example in which the present invention is applied to a tape recorder will be described in detail with reference to FIGS. 1 to 4.

FIG. 1 shows the circuit configuration of this embodiment. In the figure, (IL) and (IR) are input terminals to which L channel signals and R channel signals are respectively supplied, and these input terminals ( Signals from IL) and (IR) are sent to level controllers for adjusting the recording level, such as electronic zolium (2L).
) and (2B). Balancing of both signals is done by a level adjuster, for example electronic thium (3), connected between the outputs of electronic thium (2L) and (2R).

The signals level-adjusted by the electronic volume controller (2L) and (2ω) are amplified by the recording amplifiers 7° (4L) and (4R), respectively, and then connected to the recording/playback switch (5L) and (5R).
The signal is supplied to the stereo recording/reproducing head (6) through the contact REC side of the signal head 76, where it is recorded as a stereo signal by the sumo wrestler.

During playback, both switches (5L) and (5R) are at contact P.
When switching to the B side, the signals reproduced from the tape (7) by the head (6) are transferred to the switch (5L) and (5R), respectively.
) through the contact PB side of the playback amplifier (8L) and (8R
), during playback, the level controller for adjusting the line-out level, such as electronic thirium (IOL) and ( IOR).

Then, after narrowing down to an arbitrary level, the output terminal (l
it, ) and (lla) as reproduced stereo signals. In addition, the contacts S side of the switches (9L) and (9R) are connected to the output sides of the electronic volume controllers (2L) and (2R).
) to the contact S side, the signals from the electronic volume controllers (2L) and (2R) are switched to the switches (9L) and (9L).
Since the signal is output to the output terminals (llt, ) and (IIR) via the terminal R), it is also possible to monitor the sound source currently being recorded.

Further, a control circuit a2 is provided, and this control circuit (12+
For example, the recording level (T'/-(t31s) recording L-R balance switch (14
1 and a line-out level switch α9 are provided.

For example, when the switch (13) is pressed, such a state is detected by the control circuit O3, and a control signal is formed by the decoder (I6) based on the detection output, and this control signal causes the electronic zolium (2L) and (2R) is controlled.

Similarly, when the switch α is pressed, electrons are generated via the control circuit (13) and the decoder (17).
) is controlled, and when the switch α9 is pressed, the electronic volume (IOL) and (IOR) are controlled via the control circuit and decoder αυ. In addition, each switch (131~
(The symbols attached to the left and right sides of the drawing of C51 indicate that when you press the side with that symbol, the corresponding amount of change is obtained. When you press the + side of the knob, for example, switch αJ, Electrons, j?rium (2L) and (2R) are controlled in the direction of increasing the recording level setting, and when you press the - side,
Controlled in the direction of attenuation. Also, if you press the R side of the switch (14), the electronic volume (3) will change the balance setting to R.
The channel side is controlled in the increasing direction, and when the L side is pressed, the L channel side is controlled in the increasing direction. Similarly, if you press the + side of the switch (151), electronic zolium (IO
L) and (IOR) are controlled in the direction of increasing the line out level setting, and when pressed on the - side, they are controlled in the direction of attenuation.

In addition, an indicator (1'J) indicates the recording level, recording L-R balance, and line out level corresponding to switches 0, 2, and α5 of the control circuit σ2. Based on the control, it works to selectively display via the drive circuit (a).In other words, the display device (1'
When either the switch (131, C14) or α9 is pressed, the current setting level is changed by the control of the control circuit cL2) as shown in FIG. Select and display. Incidentally, Fig. 2B shows that when the current electronic zolium (3) is balanced, the setting level is changed as described above under the control of the control circuit Z, and accordingly, the display <11. The displayed content also changes.

Also, when switch [+31- shout is not pressed,
The control circuit (1z) determines the current operating mode of the tape recorder depending on the presence or absence of a recording rung signal (not shown) that is applied to the terminal CD and lights up during the recording mode, and if it is in the recording mode, the display a9 For example, the recording level is preferentially displayed on the display 4, and when the mode is other than the recording mode, the line-out level is preferentially displayed on the display 4.

In addition, in the above-mentioned display operation, the control circuit (121 is
Even after pressing and releasing each switch, the display member displays the display contents corresponding to the pressed switch for a while, for example, about 2 seconds, and then shifts to the contents to be displayed preferentially as described above.

Further, this level setting and its display operation will be explained with reference to FIG. Now, when any of the switches 03 to a9 is pressed, this is detected in the control circuit α2, and for example, first, it is determined whether the switch input is to increase the recording level ←), and if it is in the direction of increase, the decoder The set levels of electronic thium (2L) and (2R) are increased through αe, and at the same time, the recording level is displayed on the display (I9) and its value is increased in accordance with the set level.

On the other hand, if the direction is not to increase the recording level, in the next step it is determined whether the switch input is to attenuate (c) the recording level, and if it is in the direction of attenuation, contrary to the above, electrons, ft. Attenuate the set levels of Polyum 2L) and (2R), and at the same time display the recording level on the display H and attenuate the value corresponding to the set level.

If the direction is not to attenuate the recording level, the process proceeds to the next step, where it is determined whether the switch input increases the L channel side of the recording balance, and if it is the direction to increase the 1L channel side, the decoder Qn is input. The set level of the electronic zolium (3) is made to increase on the L channel side, and at the same time, the recording balance is displayed on the display (11), and the level on the L channel side is increased.

On the other hand, if the direction is not to increase the L channel side, in the next step it is determined whether the switch input is to increase the R channel side of the recording balance, and if the direction is to increase the R channel side, as described above. Similarly, the set level of electronic zolium (3) is increased on the R channel side via the decoder α power, and at the same time, the recording balance is displayed on the display 4 to increase the level on the R channel side.

If the direction is not to increase the R channel side, it is determined whether the switch input increases the line out level (g), and if it is the direction to increase the line out level, the electronic polyurethane (10t, ) and (IOR) are increased, and at the same time the line out level is displayed on the display (1'J) and its value is increased in accordance with the set level.

On the other hand, if the direction is not to increase the lineout level,
In the next step, it is determined whether the switch input is to attenuate (to) the line out level, and if it is in the direction of attenuation, the electron/IJum (IOL) and (10a) settings are set, contrary to the above. The level is attenuated, and at the same time, the line out level is displayed on the display and its value is attenuated in accordance with the set level.

If the direction is not to attenuate the line-out level, proceed to the next step. In this step, as mentioned above, whether there is no switch input to increase or decrease each level, or whether a predetermined period of time has passed since the switch was released, for example, 2 seconds in this case, after setting each level and displaying its value. If 2 seconds have passed, it is further determined whether there is a recording lamp signal input, that is, whether the operation mode is recording mode or another mode, and if it is recording mode, recording is started. The level value is displayed preferentially, and in a mode other than the recording mode, the line-out level value is preferentially displayed, and the level setting and display operation is completed.

If 2 seconds have not passed since the switch was released, the same action as above will be repeated.

Note that the number of idle numbers for setting and displaying these levels is not necessarily limited to the above-mentioned order, and may be determined as necessary.

In this way, in this embodiment, one indicator (l'J) can display a plurality of setting levels, here the recording level,
-) L balance and line out balance levels can be selected and displayed, and when the operation input switch is not pressed, a predetermined setting level is given priority according to the operation mode 9. In other words, in this case, when in the recording mode, the verbal record level can be preferentially displayed, and when in a mode other than the recording mode, the line-out level can be preferentially displayed.

FIG. 4 shows an example of a tape recorder to which the present invention is applied, and in the figure, parts corresponding to those in FIG. 1 are given the same reference numerals.

Also, in the same figure, Gυ is the housing, and 1321 is the cassette F.
Mounting part, (to) is record button, (34) 11 record button (33i
, recording lamp that lights up when % is pressed, G9 play button,
06) is the fast forward button, c3? ) is the rewind button, profit is the stop button,
The zero bell represents the pause button.

Application Examples Although the above-described embodiments have been described with reference to the case in which the present invention is applied to a tape recorder, the present invention can be similarly applied to other electronic devices that require a plurality of level displays. Further, the types and number of levels to be set and displayed are not limited to those described above, and may be set arbitrarily.

Effects of the Invention As described above, according to the present invention, the levels set by a plurality of electronically controllable level adjusters are selected according to the operation mode and the operation input of the level adjusters, and a single display is displayed. Since the display is switched by , there is no need to provide a drive circuit or display for each setting level, the number of parts is reduced, the configuration is simple, the cost is low, pl, and operability is improved. .

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention; Fig. 2 is a diagram for explaining the invention in detail; Fig. 3 is a flowchart for explaining the operation of Fig. 1;
The figure is an external perspective view showing an example of a tape recorder to which the present invention is applied. (2L), (2R) are electronic volume controls for recording level adjustment, (3) are electronic volume controls for recording balance adjustment,
IOL). <l0R) is an electronic polyurethane for line out level adjustment,
(Iz is the control circuit, a31 is the recording level switch, Q4
1 is Nikkiroku L-R balance switch, α9 is line out level switch, Q, 61. μ71. (181 is a decoder, a sickle is a display, 121 is a drive circuit.

Claims (1)

[Claims] A plurality of electronically controllable level adjusters, an operation input means for controlling each of the plurality of level adjusters, and an operation input means for controlling the plurality of levels according to an operation mode and input from the operation input means. A level display device comprising display means for selecting and displaying a set level of a device.