JPH0331006B2 - - Google Patents

Description

[Detailed Description of the Invention] Field of Application The present invention relates to a new channel selection device for a television receiver, and particularly to a channel selection device that can easily select a channel that was selected before the currently selected channel, and that can be used for a long time. Another object of the present invention is to provide a new channel selection device for a television receiver, which allows users to alternately select and listen to any two channels by simple operations.

Background When enjoying television broadcasts, it is not uncommon to select two channels alternately. For example, one channel may be broadcasting a boxing title match and another channel may be broadcasting a professional baseball game, so you can watch boxing during each round of boxing and watch professional baseball during the break between each round. This is the case. In such a case, in the past, it was necessary to specify the channel each time the channel was switched. Moreover, switching channels can be surprisingly troublesome if done frequently. Particularly in television receivers of the type that use a numeric keypad to select channels, which is common in the United States, it is very troublesome to press the key switch twice to select one channel. Furthermore, in places like the United States where there are dozens of broadcasting channels, it is common for people to forget or misremember the channel that is broadcasting the program they are trying to watch. It is not uncommon to have to review tables, etc.

Purpose Therefore, the present invention enables the channel selected before the currently selected channel to be selected by a simple operation, and furthermore, it is possible to select any two channels alternately by a simple operation. The present invention aims to provide a new channel selection device for a television receiver that is capable of selecting a channel.

Technical Means for Achieving the Object The configuration of the present invention for achieving the above object includes a tuning operation section for specifying a channel selection by key operation, etc., and a channel selection operation section for specifying a channel selection from the tuning operation section. The channel selection control circuit includes a channel selection control circuit that controls a tuner according to a channel designation signal, the channel selection operation section is provided with a previous channel selection switch, and the channel selection control circuit changes the channel to which the television receiver is tuned. A previous channel storage section is provided that stores a channel designation signal that specifies a channel that was tuned before the current tuning, and when the previous channel designation switch is operated, the channel designation stored in the previous channel storage section is changed. It is characterized in that the tuner is controlled by signals.

Embodiments Hereinafter, a channel selection device for a television receiver according to the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

The drawings show an example of the implementation of a channel selection device for a television receiver according to the present invention.

Reference numeral 1 denotes a remote controller for specifying a selected channel, and includes ten key switches ₂₀ to ₂₉ and a previous channel selection switch 3. Each of the ten key switches ₂₀ to ₂₉ is assigned a number from 0 to 9, and the assigned number is displayed on the top of each key switch. And one key switch 2
When the key switch 2 is pressed, the remote controller 1 emits an infrared numeric coded signal encoded with the same numerical value as the number given to the key switch 2. Further, when the previous channel selection switch 3 is pushed, a previous channel selection signal by infrared rays is emitted from the remote controller 1.

4 is a channel selection control circuit within the television receiver body, and T1 is its remote control signal input terminal. A photodiode is connected between this remote control signal input terminal T1 and ground.
PD is grounded. This photodiode PD
It receives a numerically coded signal or previous channel selection signal using infrared rays from the remote controller 1 and converts it into an electrical signal, and the converted numerically coded signal or previous channel selection signal is sent to the input circuit 5. is input.
The input circuit 5 functions to convert the input signal into a pulse signal of a predetermined level and send it to the decoder 6 bit by bit.

The decoder 6 receives the numerically encoded signal or the previous channel selection signal sent from the input circuit 5, and functions to generate a latch command signal or a switching signal for selecting the previous channel. is the first signal storage section.
The signal input to the decoder 6 is first input to the first-order signal storage section 6b, regardless of whether it is a numerically coded signal or a previous channel selection signal. When a new signal is input to the decoder 6 in this state, the signal inputted to the first signal storage section 6b is shifted to the tenth signal storage section 6a, and a new signal is input to the decoder 6.
The signal inputted to is inputted to the first-place signal storage section 6b. Therefore, if the key switch 2 of the remote controller 1 is pressed twice, and as a result two numerically coded signals are sequentially input to the decoder 6, the numerical value generated by pressing the first key switch 2 will eventually be The coded signal is stored in the tens signal storage section 6a, and is also used for the next key switch 2.
The numerically encoded signal generated by the push will be stored in the first signal storage section 6b. A channel designation signal for designating one channel is constituted by the two numerically encoded signals stored in the tenth place signal storage section 6a and the first place signal storage section 6b. Therefore, every time this decoder 6 receives two numerical coded signals, it assumes that one channel designation signal has been input and generates one latch command signal, and each time a previous channel selection signal is input, it generates one latch command signal. A switching signal for selecting one previous channel is generated.

Reference numeral 7 denotes a buffer, which receives a latch command signal from the decoder 6 and takes in a channel designation signal in the decoder 6. 8 is a selector which, when receiving a latch command signal from the decoder 6, selects the buffer 7 and takes in the channel designation signal stored therein, and when receiving a previous channel selection switching signal from the decoder 6, selects the It functions to select the channel storage register 9 and take in the channel designation signal stored therein. The previous channel storage register 9 functions to take in and store the channel designation signal from the delay register 10 every time it receives a latch command signal or a previous channel selection switching signal from the decoder 6. Further, when the delay register 10 receives a latch command signal or a previous channel selection switching signal from the decoder 6, it sends the channel designation signal already stored in the register 10 to the previous channel storage register 9, and also sends a new channel designation signal from the selector 8. It functions to capture and store channel designation signals. That is, delay register 1
0 holds the channel designation signal to be stored in the previous channel 9. Reference numeral 11 denotes a frequency setting circuit that converts the channel designation signal sent from the selector 8 into a frequency control signal, and is composed of, for example, a ROM, and the frequency control signal is added to the PLL tuning circuit 12. The PLL tuning circuit 12 receives the frequency control signal and controls tuning of the tuner 13 of the television receiver.

14 is a numeric keypad input circuit which processes the numeric keypad input signal generated by operating the numeric keypad provided on the main body of the television receiver; its output signal is also input to the decoder 6, and the output signal is input from the input circuit 5. is processed in the same way as the signal.

The operation of the illustrated channel selection device will be explained below.

When attempting to select, for example, the 48th channel by operating the remote controller 1, the user first presses the key switch ₂₄ corresponding to the numerical value "4" in the tens place of that channel. Then,
The remote controller 1 emits an infrared numeric coded signal coded as "4",
The signal is received at photodiode PD. Then, the numerically coded signal is inputted to the first-order signal storage section 6b of the decoder 6 via the input circuit 5.

Next, after pressing the key switch corresponding to the tens digit value of the channel, the key switch 2 corresponding to the ones digit value of the channel, in this example, "8" is pressed. Then, the remote controller 1 emits an infrared numerically encoded signal with the code "8", and the signal is received by the photodiode PD. The signal is then input to the decoder 6 via the input circuit 5. Then, the first place signal storage section 6b
The numerically encoded signal encoded with "4" stored in is shifted to the tens-place signal storage section 6a, and the numerically encoded signal encoded with "8" newly input to the decoder 6 becomes the first-place signal. It is stored in the storage section 6b. Thus, the decoder 6 is in a state where a channel designation signal designating the 48th channel is stored. At that time, the decoder 6 sends a latch command signal to the buffer 7, selector 8, delay register 10, and previous channel storage register 9.

In response to the latch command signal from the decoder 6, the buffer 7 enters a state to receive the channel designation signal stored in the decoder 6, and the selector 8 sends the channel designation signal in the buffer 7 to the frequency setting circuit 11 and the delay register 10. Therefore, the channel designation signal designating the 48th channel in the decoder 6 is first loaded in parallel into the buffer 7, and then from the buffer via the selector 8 to the delay register 10 and the frequency setting circuit 11.
sent to. The frequency setting circuit 11 is the selector 8
When it receives a channel designation signal from , it generates a corresponding frequency control signal and sends it to the PLL tuning circuit 12 . Then, PLL tuning circuit 12
Channel 13 to select channel 48
control the channel selection. As a result, the television receiver becomes tuned to channel 48.

The latch command signal generated from the decoder 6 is also applied to the delay register 10, and when the delay register 10 receives the latch command signal, it sends the already stored channel designation signal to the previous channel storage register. Since the delay register 10 also functions to accept and store the channel designation signal sent from the selector 8, the delay register 10 is in a state where the channel designation signal designating the 48th channel is stored.

When the television receiver is in the state where the 48th channel is selected and the remote controller 1 is operated to select the 15th channel, the following will occur. That is, when selecting the 15th channel, first press the key switch 2 ₁ corresponding to the tens digit "1", then press the key switch 2 ₅ corresponding to the ones digit "5". push. Then, as is clear from the above explanation, the tens signal storage section 6a of the decoder 6 stores a signal coded as "1", and the first signal storage section 6b stores a signal coded as "5". , the decoder 6 enters a state in which a channel designation signal designating the 15th channel is stored. Immediately when this state is reached, a latch command signal is sent from the decoder 6 to the buffer circuit 7, selector 8, etc., so the channel designation signal designating the 15th channel stored in the decoder 6 is loaded into the buffer 7, and then the latch command signal is sent to the buffer circuit 7, selector 8, etc. The signal is loaded into the frequency setting circuit 11 via the . Therefore, the tuner 13 of the television receiver is in a state in which it is tuning the broadcast waves of the 15th channel.

On the other hand, when the delay register 10 receives the latch command signal generated from the decoder 6, it sends a channel designation signal for displaying the already stored 48th channel to the previous channel storage register 9, and also sends the 48th channel from the selector 8 to the previous channel storage register 9. Stores channel designation signals that designate 15 channels. Further, the previous channel storage register 9 receives and stores a channel designation signal sent from the selector 8 that designates the 48th channel. Thus, the previous channel storage register 9 stores a channel designation signal designating the channel selected before the current channel selection, that is, the 48th channel.

Next, when the previous channel designation switch 3 of the remote controller 1 is pushed, a previous channel selection signal is emitted from the remote controller 1, and the photodiode PD receives the previous channel selection signal. The previous channel selection signal is inputted to the first-order signal storage section 6b of the decoder 6 via the input circuit 5, and as a result, the previous channel selection switching signal is sent from the decoder 6 to the selector 8, decoder storage register 9, and delay register 10. is sent. When the selector 8 receives the previous channel selection switching signal, it selects the previous channel storage register 9, takes in the channel designation signal stored therein, that is, the channel designation signal designating the 48th channel, and sends it to the frequency setting circuit. 11
and sends it to the delay register 10. the result,
The television receiver changes from being tuned to channel 15 to being tuned to channel 48.

On the other hand, by receiving the previous channel selection switching signal, the delay register 10 sends out a channel designation signal specifying the 15th channel stored at that time to the previous channel storage register 9, and at the same time sends it out from the selector 8. A channel designation signal designating the 48th channel is stored.
Furthermore, the previous channel storage register 9 enters a state in which it stores the channel designation signal sent from the delay register 10 upon receiving the previous channel selection switching signal, so that the contents of the channel designation signal stored therein are stored in the channel designation signal from the 48th channel. Changes to channel 15.

Next, when the previous channel selection switch 3 of the remote controller 1 is pressed again, the number stored in the previous channel storage register 9 is selected.
Since the channel designation signal designating the 15th channel is sent to the frequency setting circuit 11 through the selector 8, the television receiver changes from the state where the 48th channel is selected to the state where the 15th channel is selected. At the same time, the content stored in the delay register 10 changes from the channel designation signal specifying the 48th channel to the channel designation signal designating the 15th channel, and the content stored in the previous channel storage register 9 indicates the 15th channel. The channel designation signal that designates the 48th channel changes from the channel designation signal that designates the 48th channel.

By pushing the previous channel selection switch 3, the 48th channel and the 15th channel can be selected alternately.

In addition, if you stop alternately selecting the 48th channel and the 15th channel and select another channel, the number corresponding to the tens place of the new channel you are trying to select will be changed. Needless to say, it is sufficient to press the key switch 2, and then press the key switch 2 corresponding to the numerical value in the ones place.

Application example The operation of the channel selection device has been explained using the case where the remote controller 1 is operated as an example, but the operation of the channel selection device also occurs when the key switch or front channel selection switch on the main body of the television receiver is operated. This is exactly the same as when operating the remote controller 1.

Effects As described above, the channel selection device of the television receiver of the present invention includes a channel selection operation unit that specifies the channel selection by key operation, etc., and a channel designation unit that specifies the channel selection from the channel selection operation unit. It consists of a tuning control circuit that controls the tuner according to the signal.
The channel selection operation section is provided with a previous channel selection switch, and the channel selection control circuit is configured to change memory contents each time the channel to be tuned on the television receiver changes to specify a channel that was tuned before the current tuning. The apparatus is characterized in that a previous channel storage section is provided for storing a channel designation signal to be used, and when the previous channel designation switch is operated, the tuner is controlled by the channel designation signal stored in the previous channel storage section. The channel selection control circuit is provided with a previous channel storage unit that stores a signal specifying a channel tuned before the current tuning, and when the previous channel selection switch is operated, the channel stored in the previous channel storage unit is selected. Since the tuner is controlled by a designated signal, the previously tuned channel can be easily selected by operating the previous channel selection switch, and two channels can also be selected alternately. It's easy to tune in.

[Brief explanation of the drawing]

The drawing is a block diagram showing an embodiment of a channel selection device for a television receiver according to the present invention. Explanation of symbols, 1...Tuning selection operation section, 2...Key,
3... Previous channel selection switch, 4... Tuning control circuit, 9... Previous channel storage unit, 13... Tuner.

Claims (1)

[Claims] 1 Consists of a tuning operation section that specifies a channel to be selected by key operation, etc., and a tuning control circuit that controls the tuner in response to a channel designation signal from the tuning operation section that specifies the channel to be selected; The operation section is provided with a previous channel selection switch, and the channel selection control circuit is provided with a channel designation switch whose memory content changes every time the channel being tuned on the television receiver changes and designates the channel tuned before the current tuning. A television receiver characterized in that a previous channel storage section for storing signals is provided, and when the previous channel designation switch is operated, the tuner is controlled by the channel designation signal stored in the previous channel storage section. Channel selection device.