JPH0342792Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a remote control channel selection device for television receivers and video tape recorders (VTRs), which allows channel selection to be preset using a remote control transmitter.

(b) Conventional technology In television receivers and VTRs, a numeric keypad input device is provided on the remote control transmitter, desired tuning data is preset on each of the numeric keys in advance, and the numeric keypad input device is used when selecting a channel. The ones that can be operated and transmit the channel selection data to the main unit of the device are being prized. In particular, Japanese Utility Model Application Publication No. 58-119237 discloses a configuration in which the preset operation can also be performed using the ten-key input means.

In the conventional technology, the remote control transmitter itself has a built-in memory to store tuning data corresponding to each numeric keypad, and when tuning, transmits the corresponding tuning data to the device itself, and the device itself receives this tuning data. The desired channel is selected by inputting it into the tuner, and the contents of the memory can be changed freely by operating the numeric keypad as necessary.

(c) Problems to be solved by the invention According to the above-mentioned conventional technology, since the memory for storing channel selection data is located on the remote control transmitter side, it is impossible to select a channel by operating the channel on the device itself. When the output decreases due to a transmitter failure or loss, or due to battery exhaustion, tuning operations become difficult.

(d) Means for solving the problem In the present invention, only the channel selection preset means is provided on the remote control transmitter side, and the storage means for storing preset data is provided on the device itself. It is characterized by

(e) Effects Since the present invention is constructed as described above, it is possible to preset the channel selection using the remote control transmitter, and at the same time, it is also possible to select the channel from the main body of the device.

(f) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a circuit block diagram of the device of this embodiment;
The figure is an explanatory diagram of a remote control transmitter.

The remote control transmitter 1 is provided with various operation switches, and in the center of the upper end surface is provided a transmitting section 2 for transmitting various remote control signals to the main body of the device.

3, 3... are 12 position keys, which function as the channel selection operation means 4 when selecting a channel, and each key has a "1"
Each number is given one by one from ``12'' to ``12''.

5 is a power ON/OFF switch, which controls the power ON/OFF of the VTR (device main body).

6 and 7 are for fast forwarding (FF) and rewinding (REW),
8 and 9 are for recording (REC) and playback (PLAY), 1
0 and 11 are operation buttons for still playback (STILL) and slow playback (SLOW), and normal operation means 12
and issues a mode designation signal _S1 .

13 is channel UP key, 14 is channel
This is the DOWN key, and each press increases or decreases the receiving channel number. These channel UP/DOWN keys 13, 14, channel display keys 15, 16, tuning UP/DOWN keys 13, 14, channel display keys 15, 16,
DOWN keys 17, 18, preset key 19,
The memory key 20 constitutes a channel selection preset means 21 which is used for a channel selection preset operation to be described later. The contents input to the channel selection preset means 21 are displayed on the display 50.

Each of the mode designation data D ₁ inputted from the normal operation means 12, the tuning designation data D ₂ inputted from the tuning operation means 4, and the preset data D ₃ inputted from the tuning preset means 21 is input to an encoder. 22 and is input to the transmitting circuit 23, causing the light emitting diode of the transmitting section 24 to emit light, and transmitting it as a remote control signal to the light receiving section 26 of the VTR 25.
phototransistor.

The remote control signal received by the phototransistor is input to the decoder 28 via the receiving circuit 27, where it is decoded and restored to the original mode designation data _D1 , channel selection data _D2 , and preset data _D3. . Here, the remote control signal is the mode specification data.
If D ₁ , the output of this decoder 28 is input to the system controller 29 to set the desired mode. In addition, in the case of tuning designation data D ₂ or preset data D ₃ related only to tuning, the tuning control circuit 51 is used together with the holding circuit 31, the tuning data extraction circuit 34, and the read/write control circuit 32, which will be described later. The data is input to the discrimination circuit 30 that constitutes the channel selection data D2 or the preset data D3, and it is determined whether the data is channel selection designation data _D2 or preset data _D3 .
It is held in the holding circuit 31.

Here, select the channel selection data D ₂ and preset data.
I will explain the difference from D ₃ . Channel selection data
D ₂ is a signal issued by pressing the position keys 3 without pressing the preset key 19 and in the image reception mode.
It consists only of codes corresponding to each of the...

On the other hand, the preset data D ₃ is obtained by pressing the channel UP/DOWN keys 13 and 13 until the number corresponding to the position key for which you wish to preset the channel is displayed on the display 50, with the preset key 19 pressed to enter the channel selection mode. 14, then press the channel display keys 15 and 15 for the tens and ones digits.
16 and input the channel number of the desired broadcasting station while displaying it on the display 50.
Furthermore, by pressing the tuning UP/DOWN keys 17 and 18, the screen of the corresponding channel is displayed on the monitor and the tuning voltage is determined. After setting a desired channel to a predetermined position key, the channel selection is created by a series of preset operations in which the memory key 20 is pressed.

For example, when setting the "1" position key to the "36" channel, first set the data code a corresponding to preset key 19 as shown in FIG.
Next, data code b corresponds to position key "1", data code c corresponds to "3" by channel display key (10th position) 15, and data code c corresponds to "6" by channel display key (1st position) 16. It is composed of a data code d, a data code e corresponding to a desired tuning voltage, and a data code f corresponding to the memory key 20.

Therefore, the discriminating circuit 30 discriminates between the channel selection designation data _D2 and the preset data _D3 by discriminating whether or not the first output of the decoder 28 corresponds to the data code a. data code a
If there is, that is, if it is preset data _D3 , a write command signal is issued from the discrimination circuit 30 to the read/write control circuit 32, and the preset data in the holding circuit 31 is stored in the memory 33 as channel selection data. written. Also data code a
If there is no selection data, that is, if it is the tuning designation data _D2 , a read command signal is issued, the tuning data in the memory 33 is read out, and the tuning data extraction circuit 34 extracts the selection data in the holding circuit 31. Station specification data
Tuning data corresponding to _D2 is extracted, inputted to the D/A converter 35, converted into an analog value, and supplied as a tuning voltage to the tuner circuit 36 to execute desired channel selection.

In addition, tuning UP/
Only the data regarding the tuning voltage (data code e) inputted by the DOWN keys 17 and 18 is supplied to the half circuit 30, and at the same time, is supplied directly to the tuner circuit 36 so that the image of the broadcasting station is displayed on the monitor. Data code a, b, c,
Among d, e, f, for b, c, d, e,
It includes all the input data until the desired value is reached using the same key (UP/DOWN keys are considered the same), but it is stored in the memory 33 as channel selection data.
Only the final value entered by each key is written to.

Reference numerals 37 and 38 are a main body side tuning operation means and a main body side tuning presetting means, which are the same keys as the various keys arranged on the remote control transmitter 1, but are arranged on the VTR main body side. The input data is sent to the discrimination circuit 3 in the same way as the remote control signal.
0 and the same processing is performed.

39 is an automatic fine adjustment switch, which is set to the release position before starting the tuning preset to cancel the AFT operation performed on the VTR side, and after the tuning preset is completed,
A command signal is issued to return to the operating position and restart AFT operation.

FIG. 4 is a flowchart showing the above-mentioned circuit operation. Preset key 1 according to step (a)
Data code a according to step 9, data code b for position key setting according to step (b), data code c corresponding to channel display key (10th place) according to step (c), channel display key according to step (d). (1st place) The data code d corresponding to 16 is the data code e corresponding to the desired tuning voltage according to the procedure (E), and the data code e corresponding to the desired tuning voltage is the memory key 20 according to the procedure (F).
A data code f corresponding to is formed. In addition, after writing of the channel selection data is completed, the preset key 1 is pressed.
By pressing 9 again, the preset channel selection mode shifts to the channel selection mode.

(G) Effects of the invention As described above, according to the invention, the preset tuning operation can be performed using the remote control transmitter, and since the memory for storing tuning data is installed in the device itself, the tuning operation can be performed by the device itself. This is also possible on the main body side, and has high practical value.

[Brief explanation of the drawing]

The drawings all relate to one embodiment of the present invention, and FIG. 1 is a circuit block diagram, FIG. 2 is an explanatory diagram of a remote control transmitter, FIG. 3 is an explanatory diagram of a remote control signal, and FIG. 4 is a flowchart. 4...Tuning selection operation means, 21...Tuning selection presetting means, 33...Memory (storage means), 51...
Tuning control circuit.

Claims (1)

[Claims for Utility Model Registration] A remote control having a tuning operation means for issuing tuning command data for selecting a channel, and a tuning presetting means for presetting tuning data corresponding to the tuning operation means. a transmitter, a storage means for storing the channel selection data, a device for reading out channel selection data corresponding to the channel selection command data from the storage means at the time of channel selection, and loading the channel selection data into the storage means at the time of presetting the channel selection; A remote control channel selection device comprising a device main body having a channel selection control means for writing.