JPS6010145Y2 - television receiver - Google Patents

Description

[Detailed description of the invention] This invention is based on the invention that when the volume is changed using the remote control in a television receiver that can be controlled by a remote control (remote control) for adjusting the volume, the volume changes from the TV screen as shown in FIG.
It is intended to be able to display it in a bar graph format as Pattern 2.

Let's explain one example below.

In FIG. 2, 10 indicates a video signal system, 11 is a tuner, 12 is a video intermediate frequency amplifier, and 13 is a video detection circuit.
4 to the picture tube 15.

Further, 20 indicates a deflection system, 21 indicates a synchronous separation circuit, and 22
23 is a vertical deflection circuit, 23 is a horizontal deflection circuit, and 24 is a vertical and horizontal deflection coil.

Note that Pv is a vertical synchronization pulse and ph is a horizontal synchronization pulse.

Furthermore, 30 indicates an audio signal system, in which an audio intermediate frequency signal from the detection circuit 13 is supplied to an audio demodulation circuit 32 through an audio intermediate frequency amplifier 31 to demodulate the audio signal, and this audio signal is sent to a preamplifier 33 and a power amplifier. The signal is supplied to the speaker 35 through 34.

Further, 40 indicates a control circuit for manually adjusting the volume.

That is, Su is an up switch to increase the volume, Sd is a down switch to decrease the volume, and 4
5 is an up/down counter, 46 is a clock pulse type control circuit for forming a clock pulse Pc of several Hz serving as a count input thereof, and 47 is a D/A converter.

And, while the amplifier 33 is made into a variable gain amplifier,
The output of converter 47 is supplied to amplifier 33 as a control signal for its gain.

Therefore, for example, when the switch Su is turned on, the output of the OR circuit 41 becomes 1'', and the clock pulse Pc from the pulse forming circuit 46 is supplied to the up-count terminal U of the counter 45 through the AND circuit 43.

Therefore, as the count value of the counter 45 increases, the output level of the converter 47 also increases, and the gain of the amplifier 33 increases, causing the volume to increase.

Furthermore, when the switch Sd is turned on, the output of the OR circuit 42 becomes 1', so that the clock pulse Pc is supplied to the down count terminal of the counter 45 through the AND circuit 44.

Therefore, as the count value of the counter 45 decreases, the output of the converter 47 decreases accordingly, so the gain of the amplifier 33 decreases and the volume decreases.

Then, when both switches Su and Sd are off,
Since the outputs of the OR circuits 41 and 42 become "0" and the clock pulse Pc is not supplied to the counter 45, the count value of the counter 45 does not change.
Since the output is also at a constant level corresponding to the count value of the counter 45, the volume is also constant.

Therefore, the volume can be adjusted by operating the switches Su and sct.

Further, 50 indicates a volume control circuit using a remote control.

That is, 51 indicates a remote control signal receiving element, for example, in the case of an infrared remote control, an infrared light receiving element, and the received signal of this element 51 is supplied to a receiving circuit 52 where necessary signal processing is performed. When the volume up switch of the remote control's transmitter (not shown) is operated, the pulse Pu that remains at "1" for the duration of the operation is taken out and the pulse Pu is supplied to the decoder 53, and the pulse Pu is supplied to the decoder 53. When the volume down switch of the machine is operated, the pulse Pd that is "1" is extracted only during the period in which the switch is operated.

Then, these pulses Pu or Pd are connected to the OR circuit 41,
42 to AND circuits 43 and 44.

Therefore, when the volume up switch of the remote control's transmitter is operated, the clock pulse Pc is generated by the pulse Pu.
is supplied to the up count terminal U of the counter 45, and when the down switch is operated, the clock pulse Pc is supplied to the count terminal of the counter 45 due to the pulse Pd, so that the volume can be adjusted using the remote control.

When the volume is adjusted using the remote control, a circuit 60 for displaying the volume as shown in FIG. 2A is provided.
It is composed as follows.

That is, the horizontal synchronization pulse ph from the synchronization separation circuit 21
Bt in FIG.
As shown in C, a sawtooth wave signal s synchronized with the pulse ph
This signal sh is supplied to the voltage comparator circuit 62, and the audio signal from the amplifier 33 is supplied to the peak value detection circuit 63, as shown in FIG. This signal Sp is supplied to the comparison circuit 62.

In this way, the voltages of the signals sh and Sp are compared in the comparator circuit 62, and as shown in FIGS. A PWM signal Sw whose trailing edge position is modulated by the signal Sp is extracted, and this signal S
w is supplied to the AND circuit 64.

Further, the vertical synchronization pulse Pv from the synchronization separation circuit 21 is supplied to the monostable multivibrator 65, and as shown in FIG.
As shown in F, a signal Sf is formed that rises at pulse Pv and falls at a time point corresponding to the bottom of screen 1,
This signal Sf is supplied to another monostable multi-by-break 66, and as shown in FIG. The signal is supplied to circuit 64.

Therefore, the AND circuit 64 outputs the signal Sw for each period γ.
is taken out.

Furthermore, an OR circuit 71 is configured by transistors Q1 to Q1, and the outputs of switches Su and Sd are connected to transistors Q3. At the same time, the output pulses Pu and Pd of the decoder 53 are supplied to the time constant circuit 72 through the OR circuit 73, and the output thereof is supplied to the transistor Q1.

In this case, the time constant circuit 72 responds quickly to the rise of the output with respect to the input, and slows the response to the fall of the output.

Then, the output of the transistor Q is supplied to the AND circuit 68, and the output of the AND circuit 64 is supplied to the AND circuit 68.
The output of the AND circuit 68 is supplied to the video amplifier 14 as a brightness control signal, and when the output of the AND circuit 68 is "0", normal video amplification is performed.
At the time of 6199, the luminance signal is set to the own level, for example.

According to such a configuration, when the transmitter of the remote control is operated, the pulse Pu or P is sent to the decoder 53 as described above.
d is obtained and the volume changes.

At this time, the pulse Pu or Pd is supplied to the AND circuit 68 through the line of OR circuit 73 → time constant circuit 72 → transistor Q1 → transistor Q, so the output of AND circuit 64 passes through AND circuit 68 to amplifier 14. is supplied to

That is, the AND circuit 64 outputs the signal S for each period γ.
w is supplied to the amplifier 14.

When Sw="1", the luminance signal is at the white level, so as shown in FIG. 1A, the playback screen 1
The volume at this time is displayed as a bar graph pattern 2.

In this case, in the time constant circuit 72, even if the pulse Pu or Pd from the OR circuit 73 becomes "0", the output of the time constant circuit 72 is held at "1" for a predetermined period.

Therefore, when the transmitter of the remote control is operated, the volume changes, and the volume is displayed as pattern 2 on the screen 1 for a predetermined period from the time of the operation.

Further, when the switch Su or Sd is operated, the volume is displayed as pattern 2 only during the operation period.

Thus, according to this invention, when the volume is adjusted with the remote control, this can be displayed on the screen 1 as pattern 2.

Furthermore, since the volume is displayed on the playback screen 1, there is no need to provide a separate display means.

Note that, in the above description, if the color signal system is controlled by the output of the AND circuit 68, the pattern 2 can be colored.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining this invention, and FIG. 2 is a system diagram of an example of this invention. 10...Video signal system, 20...Deflection system, 30...Audio signal system, 40...Volume control circuit, 50... Remote control volume control system, 60
. . . shows a display signal formation system.

Claims (1)

[Claims for Utility Model Registration] A receiving circuit that receives a remote control signal for controlling volume, an amplifier for audio signals whose gain is controlled according to the remote control signal received by this receiving circuit, and an amplifier for audio signals whose gain is controlled according to the remote control signal received by this receiving circuit. A peak value detection circuit that detects the peak value of the volume-adjusted audio signal from the amplifier, and a sawtooth wave signal generator that forms a sawtooth wave signal synchronized with one of the horizontal and vertical synchronization pulses. A circuit compares the voltages of the output of the sawtooth signal forming circuit and the output of the peak value detection circuit, synchronizes with one of the synchronization pulses, and corresponds to the peak value of the volume-adjusted audio signal. a voltage comparison circuit that outputs a PWM signal having a pulse width; and a pulse that is synchronized with the other of the horizontal and vertical synchronization pulses and has a predetermined width corresponding to the width of the pattern to be displayed. a pulse generating circuit that generates the voltage, an AND circuit that takes the logical product of the output of the pulse generating circuit and the output of the voltage comparison circuit, and a circuit that supplies the output of the AND circuit to the video signal system when receiving the remote control signal. and a television receiver configured to display the peak level of the volume-adjusted audio signal in the form of a bar graph on the playback screen when receiving the remote control signal.