JPH0252916B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION For example, some color television receivers are configured so that channel switching, volume adjustment, etc. can be controlled by a remote control (remote control). has been done.

That is, in FIG. 1, 1 is Chuna, 2
3 is a video intermediate frequency amplifier, 3 is a video circuit, 4 is a color picture tube, 5 is an audio circuit, and 6 is a speaker.
Further, 10 indicates an operation circuit implemented as a single chip IC, 11 is a pulse generator that forms a clock pulse Pc of several Hz, 31 to 34 are up/down counters, 41 to 44 are D/A converters, S _1A ,
S _1B is a channel change switch, S _2A , S _2B
is a hue adjustment switch, S _3A and S _3B are color adjustment switches, and S _4A and S _4B are volume adjustment switches.

For example, if you turn on Switch S _1A ,
Since the pulse Pc from the generator 11 is supplied as an up-count input to the counter 31 through the AND circuit 21A, the count value increases and the output voltage of the converter 41 also increases accordingly. Then, since this output voltage is supplied to the tuner 1 as a channel selection voltage, the receiving channel changes in an upward direction.

Also, when switch S _1B is turned on, the pulse PC
is supplied as a down-count input to the counter 31 through the AND circuit 21B, and therefore the output voltage of the converter 41 becomes smaller and the receiving channel of the tuner 1 changes in the downward direction.

Similarly, hue adjustment is performed using the output voltage of the converter 42, and color adjustment is performed using the output voltage of the converter 43. Further, the volume is adjusted by the output voltage of the converter 44.

Further, 50 indicates a remote control operation circuit, 51 a remote control signal receiving element, 52 a receiving circuit for processing the received signal, and 53 a decoder.

Further, 60 indicates a power supply, 61 indicates a power plug,
62 and 63 are power supply circuits, and 64 is a timer circuit. Then, the DC voltage from the power supply circuit 62 is supplied to the receiving circuits 1 to 6 and the operation circuit 10 as an operating voltage, and the DC voltage from the power supply circuit 63 is supplied to the remote control operation circuit 50 and the timer circuit 64 as an operating voltage. Supplied.

When the switch S _5A is turned on, the timer circuit 64 drives the relay 65 and its contact 65S is turned on, so that the receiver enters the receiving state. Also, when the switch S _5B is turned on,
Relay 65 is deactivated, contact 65S is turned off, and the receiver is therefore in a standby state. The switches S _A to S _N are used to set the timer time, sleep time, etc. in the timer circuit 64.

On the other hand, the commander (transmitter) of the remote control is configured as shown in FIG. 2, for example.

That is, in FIG. 2, 100 indicates the commander as a whole, and switches S _1a to _{S 5b} correspond to switches S _1A to _{S 5B} , and when any one of them is operated, the output of that switch is changed to the encoder 1.
01 to form a command signal Ec as shown in FIG. 3A, for example. This signal Ec has a cueing guide signal with a constant pulse width and a 12-bit code signal. The code signal has a wide pulse width when it is "1" and a wide pulse width when it is "0". Sometimes narrow pulse width
This is a PWM signal, and the combination of "1" and "0" of this code signal is changed depending on which switch is operated among the switches S _1a to S _5b .

This command signal Ec is then transmitted to the modulation circuit 10.
2 and is converted into an AM modulated signal Em as shown in FIG.
4.

Therefore, in FIG. 1, the receiving element 51 is, for example, a phototransistor, and the command signal Ec is taken out from the receiving circuit 52. And the signal
Ec is decoded in decoder 53, and the decoded output is supplied to transistors _Q1A to _Q5B . Therefore, for example, if the switch S _1a of the commander (FIG. 2) is turned on, the transistor Q _1A is turned on and the reception channel increases.

In this way, this receiver allows channel switching and the like to be performed using the remote control.

By the way, when manufacturing a television receiver, it is necessary to check that each part operates normally by actually controlling the volume and other settings.

However, in the above-mentioned receiver, the operating means for these operations are switches _S1A to _S4B , and therefore, a considerable amount of time is required for checking. That is, when checking the volume, for example, the user presses and holds the switch S _4A to maximize the volume, then holds the switch S _4B to minimize the volume, thereby confirming that the volume can be adjusted correctly. However, at this time, it takes about 10 seconds for the volume to go from maximum to minimum (or vice versa). Therefore, in this receiver, it takes a considerable amount of time to check all the channels, hues, and colors.

In this case, if the frequency of the clock pulse Pc is high, the counting speed of the counters 31 to 34 becomes faster, and the output voltage of the converters 41 to 44 can rapidly change from the maximum value to the minimum value (or vice versa).
Therefore, the time required for checking can be shortened.

However, if this is done, even when a general user operates the switches _S1A to _S4B , the channels change quickly, making it impossible to set the channels as desired.

Also, when checking the timer circuit 64, for example, the timer time is set, and the next time the timer time reaches that time, it is confirmed that the relay 65 operates, so it is necessary to wait until the timer time arrives. . However, since the timer time is generally set in units of one minute, checking the timer time requires at least one minute.

The present invention aims to eliminate these problems and, in particular, to realize them without increasing costs.

An example of this will be explained below.

In FIG. 4, 200 indicates a remote control commander for factory check. This commander 200 includes a test switch Ss and a reset switch Sr.
are added, these switch outputs are supplied to the encoder 101, and when the switches Ss and Sr are turned on, a command signal Ec having a different code signal than when the other switches _S1a to _S5b are turned on is generated.
are formed respectively.

In addition, the remote control commander 100 for users
is the same as before, as shown in FIG.

In addition, as shown in Figure 5, the receiver has an RS
A flip-flop circuit 71 is provided, and
Switch Ss from decoder 53 to commander 200
Alternatively, the decoded signal Es or Er when Sr is turned on is taken out, and these Es and Er are supplied to the flip-flop circuit 71 as a set input and a reset input. Then, the output Qt of the flip-flop circuit 71 is supplied to the clock generator 11 as a frequency control signal, and the frequency of the clock pulse Pc is set to a standard value equal to that in the case of FIG. 1 when Qt="0". Qt="1"
For example, the value is 10 times higher. The signal Qt is also supplied to the timer circuit 64, and the clock frequency of the timer circuit 64 is set to the clock pulse Pc.
controlled in the same way. Incidentally, the flip-flop circuit 71 and the operation circuit 10 are integrated into a single chip IC.

According to such a configuration, a check at the factory may be performed as follows.

Turn on the test switch Ss of the commander 200.

When checking the volume, use Commander 200.
Turn on Switch S _4a (or Switch S _4A ).

Turn on switch S _4b (or switch S _4B ) of commander 200.

Thereafter, similarly to , switches S _1a to S _3b (or switches S _1A to _{S 3B} ) of the commander 200 are turned on in accordance with the check items.

Operate switches S _A to S _N.

That is, in the section, when the switch Ss is turned on, the signal Es is obtained from the decoder 53,
As a result, the flip-flop circuit 71 is set and Qt="1", so the clock pulse Pc
The frequency will be 10 times the normal frequency (test mode).
Therefore, in the section ~, switch S _1a
~S _4b (or switch S _1A ~ _{S 4B} ), the output voltage of converters 41 to 44 will be the same as normal.
Changes occur 10 times faster, for example, the volume changes from maximum to minimum (or vice versa) in approximately 1 second.
Therefore, the time required for these checks can be significantly reduced.

Also, when checking the timer circuit 64, the clock frequency is multiplied by 10, so even if the timer time is set in units of one minute, the timer time will reach the time in a few seconds, and the time required for checking is still can be shortened.

If necessary, turning on the reset switch Sr of the commander 200 resets the flip-flop circuit 71 and sets Qt="0".
The receiver returns to normal operation.

Thus, according to the present invention, the time required to check each item can be significantly reduced.

Moreover, in that case, since the test switch Ss is provided in the factory check commander 200,
There is almost no cost increase. That is, even if the test switch Ss is provided in the receiver, the same check can be performed, but in that case, all commercially available receivers would be provided with the switch Ss, which would increase the cost. Also, switch
Since the same number of parts as the switch Ss are required to fix the Ss, the cost also increases from this point of view.

Furthermore, if the switch Ss is provided in front of the receiver, the design of the switch Ss becomes poor even though the user does not need it, and furthermore, it requires measures to prevent the user from mischief. Further, if the switch Ss is provided on the periphery or inside the receiver, it becomes difficult to operate the switch Ss, and the much-needed reduction in check time cannot be utilized.

However, according to this invention, the test switch
Ss needs to be provided only in the commander 200 for factory check, and only a few units are required, so the cost increase due to the switch Ss and its attached parts can be ignored. Furthermore, there is no need for any design considerations or user measures. Moreover, it is easy to operate, and you can use Commander 2 without touching the receiver.
Since only 00 can be checked, the check time can be reduced to the maximum.

In the above description, the clock frequency of the timer circuit 64 increases when Qt="1", but the clock frequency remains constant and the desired operation specified by the switches S _A to S _N is performed. The time or time, for example, the timer time or sleep timer time, is set to be several seconds before the current time (the current time indicated by the timer circuit 64), and therefore,
The timer circuit 64 may perform its desired operation after a few seconds.

Further, in the above description, the object of the remote control is a color television receiver, but it may be any device that has a function that can be continuously adjusted by the remote control, such as an amplifier, a tuner, a player, or a timer.

[Brief explanation of the drawing]

1 to 3 and 5 are diagrams for explaining this invention, and FIG. 4 is a system diagram of an example of this invention. 10 is an operation circuit, 50 is a remote control operation circuit, 1
00 is a user remote control commander, and 200 is a factory check remote control commander.

Claims (1)

[Claims] 1. In a remote control system for a television receiver that changes at least the volume at a predetermined time rate based on a remote control signal from a remote control transmitter used by the user, when performing a factory check of the volume, a test A remote control method for a television receiver, wherein the volume state is changed at a speed faster than the predetermined time speed based on a remote control signal from a remote control transmitter.