JPH0319115Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates particularly to the display portion of a magnetic recording/reproducing device with a tuner, such as a stationary VTR.

BACKGROUND TECHNOLOGY AND PROBLEMS For example, in the case of a stationary VTR, a tuner is built in for timer recording or so-called reverse program recording, and recently electronic tuning tuners have been used as the tuner. In this electronically tuned tuner, any channel can be preset at each tuning position determined by the up or down button or at each tuning position determined by the tuning button. Therefore, it is necessary to display the preset state at the time of presetting. Particularly in the United States, in addition to displaying bands such as VHF low band, high band, and UHF, it is also necessary to display the frequency position within that band.

The preset status display during this preset is as follows:
In the past, the level of the control voltage supplied to the varicap of the local oscillator circuit of an electronically tuned tuner was indicated by a plurality of specially arranged light emitting diodes.
For this reason, the VTR had the disadvantage that it required a plurality of light emitting diodes and their drive circuits in addition to the fluorescent display tube section for displaying the time and channels.

Purpose of the invention In view of this point, the present invention is designed to display the preset state at the time of presetting without providing a special element for displaying the preset state.

Summary of the invention This invention is based on a display section consisting of a plurality of display units arranged in a line that displays tape running related displays such as tape running display and tape remaining amount display.
The preset state is displayed in accordance with the voltage level supplied to the variable cap at the time of presetting, and the cost can be reduced by using the display part for the same purpose.

Embodiment Hereinafter, an embodiment of this invention will be described with reference to the drawings, taking the case of a VTR as an example.

The VTR in this example is equipped with a microcomputer,
Furthermore, almost all displays such as time display, channel display, travel display, etc. can be performed using one fluorescent display tube.

FIG. 1 is a block diagram showing the outline of the system. In this figure, for convenience, the microcomputer is divided into a timer and fluorescent display tube control section 10, a tuner control section 11, and a system control section 12. Of course, these control section 10 and control sections 11 and 12 are connected to each other.

In this example, the voltage supplied from the tuner control section 11 to the variable cap of the local oscillation circuit is
The signal is supplied as a PWM signal, converted into an analog voltage in the tuner section 20, and used as a tuning control voltage.

A function key 30 is connected to the system control unit 12, and when a predetermined key is pressed, the VTR enters a mode corresponding to the key operation.

For the control unit 10, the fluorescent display tube unit 4
0 is connected, and tape running display, time display, channel display, etc. are performed centrally.

FIG. 2 shows the display contents of this fluorescent display tube section 40. To explain the main contents, 41 is a time display section, 42 is a "minute" display section, and 43 is a selection section. Station channel number display part, 44
is the mode display part of the VTR. Also, 45 is the band display part of the selected channel, and V _L is
VHF low band, V _H is VHF high band, U
means UHF. moreover,
Reference numeral 46 denotes a tape running display portion in which a plurality of display units D ₁ , D ₂ , . . . D ₈ are arranged in a line. Here, the channel selection display section 43 displays the channel number preset during normal channel selection.

In this tape running display section 46, during normal playback or recording, each of a plurality of display units is sequentially displayed one by one at a fixed display time D ₁ →D ₂ →
D ₃ ...D ₈ → D ₁ will light up and display repeatedly.
That is, the lighting display unit is displayed so as to move from left to right on the diagram. During fast forwarding or queue mode, the display time of one display unit is shortened, and movement from left to right is faster than during normal playback. During rewinding or reviewing, the moving speed of the lighting display units D ₁ to _{D 8} is the same as during fast forwarding, etc., but the direction of movement is from right to left. Further, when the pause button is pressed, all of the plurality of display units _D1 to _D8 light up. In other states, all lights are turned off.

In this example, the tape running display section 46 and the band display section 45 display the preset state at the time of presetting the selected channel.

That is, when making a preset, first press the channel selection up or down button to enter a specific channel selection position. Then, when you press the clear button, in the Chuna club
This will select the lowest frequency signal in the VHF low band. When the channel preset up button is pressed in this state, the pulse width of the PWM signal from the tuner control section 11 gradually widens, and the tuning control voltage increases. In this state, “V _L ” lights up on the band display section 45, and as the channel selection control voltage increases, a plurality of display units D ₁ to D ₈ on the tape running display section 46
However, at first all lights are off → D ₁ is lit → D ₁ and D ₂ are lit →
D ₁ , D ₂ , and D ₃ light up...and the number of display units that light up gradually increases and is displayed in response to the increase in the channel selection voltage. In other words, the frequency position in the low band is displayed. If you continue to press the UP button, all of the display units D ₁ to _{D 8} light up and then go off, and in the band display section 45, "V _L " goes out and "V _H " lights up, and the UP button is pressed. The preset frequency position in the high band is now displayed in the display section 46 by the number of display units that lights up again by continuing to press the button. If you continue to press the UP button, "U" will light up on the band display section 45 to indicate the UHF band, and all of the display units D ₁ to D ₈ will turn off as the tuning control voltage gradually increases. The number of display units that light up increases.

In this way, in the tape running display section 46,
The magnitude of the tuning voltage in the preset state at that time, and therefore the frequency position, is displayed.

No, when you press the UP button during this preset and increase the tuning control voltage, if a broadcast channel exists and it is detected, that is, when it is just tuned, for example, the channel number will light up on the display section 43. This will indicate that the channel has been tuned. Therefore, if that is the desired channel, when you release your finger from the up button, that channel will be preset. If you go too far from the just tuning state, you can return it by pressing the down button. At this time, the magnitude of the channel selection voltage is displayed by the number of lighting units of the plurality of display units D ₁ to D ₈ .

Note that the above example is a case where the display unit that displays the tape running status is also used to display the preset status, but as mentioned at the beginning,
If the device displays the remaining amount of tape and other information related to tape running, and uses a plurality of display units arranged in a line, it can also be used to display the preset state. . Of course, this is not limited to VCRs.

Effects of the invention This invention displays the preset status of an electronically tuned tuner, and in particular displays the tuning frequency position according to the magnitude of the tuning voltage, without providing a special display section, and displays information related to tape running. Since this is done using a display section, there is an advantage that the display section can also be used, resulting in cost reduction.

[Brief explanation of the drawing]

Figure 1 is a block diagram of an example of the main parts of this invention.
FIG. 2 is a diagram showing an example of display contents on the display tube section. 10 is a timer and display control section; 11
12 is a tuner control section, 20 is a tuner section, 40 is a fluorescent display tube section, 45 is a band display section, 46 is a tape running display section, and _D1 to _D8 are a plurality of display units. .

Claims (1)

[Scope of utility model registration request] It has an electronic tuning tuner, a first display section on which a display related to tape running is displayed by a plurality of display units arranged in a line, and a second display section on which a selected channel number is displayed. , when presetting the electronically tuned tuner, a plurality of display units from at least one end of the plurality of display units of the first display section are displayed according to a control voltage level that changes the local oscillation frequency of the electronically tuned tuner. The display unit lights up to display the frequency position in the selected frequency band at which the preset state of the preset channel is located, and at the same time, in the normal channel selection state, the preset state is displayed on the second display section. A magnetic recording and reproducing device with a tuner that displays a channel number.