JPH0453106Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a remote control transmitter (hereinafter referred to as a "remote control transmitter"), and more specifically relates to a structure for adjusting the volume of a television receiver, stereo, etc. .

<Prior Art> Generally, when adjusting the volume of a television receiver, stereo, etc. using a remote control transmitter, this is done by operating an operation key such as a volume UP/DOWN key on the remote control transmitter.

With such a remote control transmitter, after the volume has been optimally adjusted at a certain position by operating the keys, if the listener moves to another position, or if the degree of modulation of the sound of the broadcasting station changes. , the volume needs to be adjusted again, which is troublesome.

<Purpose of the invention> The present invention was made in view of the above points, and is optimal when the position of the listener changes or the degree of modulation of the sound of the broadcasting station changes. The purpose is to automatically adjust the volume to a suitable level.

<Structure of the invention> In order to achieve the above-mentioned purpose, the invention stores a microphone, an amplifier that amplifies the output of the microphone, and the output level of the amplifier when the volume is set to the optimum volume in the remote control transmitter. A memory is provided to control the volume of the controlled device so that the output level of the amplifier matches the output level of the amplifier in the optimal volume state read from the memory.

According to the above configuration, the volume is automatically adjusted to be optimal depending on the position where the remote control transmitter is placed. Therefore, when the listener changes position, the remote control transmitter By carrying it around, the volume will always be adjusted to the optimum level.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.
Explain in detail. FIG. 1 is a block diagram of the main parts of an embodiment of the present invention.

The remote control transmitter 1 of this embodiment is for controlling controlled equipment such as a television receiver or stereo (not shown), and FIG. 1 shows a configuration for adjusting the volume.

This remote control transmitter 1 includes a microphone 2,
Amplifier 3 that amplifies the output of microphone 2
, a first operation switch 4 that is operated when the volume is adjusted to the optimum volume state, and this first operation switch 4.
an electronic switch 5 that turns on and off according to the operation of the
Amplifier 3 provided via this electronic switch 5
an A/D converter 6 that A/D converts the output voltage of the
A memory 7 into which the output of this A/D converter 6 is written, a D/A converter 8 which D/A converts the digital data read out from this memory 7, and a D/A converter 8 in which the output of this D/A converter 8 is written. A comparator 9 which is given as a reference voltage Vref and the output voltage V of the amplifier 3 and which compares the two, and a second operating switch 10 which is operated when entering the automatic volume adjustment mode, in the automatic volume adjustment mode, The control circuit 11 outputs a control signal for volume adjustment based on the output of the comparator 9 so that the output voltage V of the amplifier 3 matches the reference voltage Vref.

Next, the operating procedure of the remote control transmitter 1 having the above configuration will be explained.

First, at a certain position, the volume of the controlled device is adjusted to an optimal state, and the output voltage of the amplifier 3 at that time is stored in the memory 7. That is, the volume is manually adjusted in the same way as in the past until the optimal volume is reached, and when the optimal volume is reached, the first operation switch 4 is turned on. This turns on the electronic switch 5 and changes the output voltage of the amplifier 3 to the A/D
The signal is supplied to a converter 6 and converted into digital data, and the digital data corresponding to this optimum volume state is written into a memory 7.

Note that the adjustment operation until the optimum volume state is achieved is the same as in the conventional case, and this adjustment operation is performed in the normal mode in which the second operation switch 10 is not operated, and the control circuit 11 is Outputs a volume UP/DOWN control signal according to the corresponding operation signal.

Next, turn off the first operation switch 4, and further,
Turn on the second operation switch 10 to enter automatic volume adjustment mode. In this automatic volume adjustment mode, based on the output of the comparator 9, the control circuit 11 adjusts the volume as described below.
Digital data corresponding to the optimal volume state read out from the memory 7 is D/A converted by the D/A converter 8 and given to the comparator 9 as a reference voltage Vref, and the output of the amplifier 3 A voltage V is applied. Comparator 9 compares output voltage V of amplifier 3 and reference voltage Vref,
Three outputs are given to the control circuit 11: larger, smaller, or equal.

In the automatic volume adjustment mode, the control circuit 11
Based on the output of the comparator 9, outputs a control signal for volume adjustment as follows.

Assuming that the output voltage of the amplifier is V and the reference voltage is Vref, (1) If V>Vref, outputs a volume DOWN control signal, (2) If V<Vref, outputs a volume UP control signal. (3) If V=Vref, no control signal is output,
The volume remains unchanged.

That is, the output voltage V of the amplifier 3 is automatically adjusted to match the reference voltage Vref corresponding to the optimal volume state.

In this way, the remote control transmitter 1 adjusts the volume to the optimum state at a certain position, and stores the output voltage of the amplifier 3 at that time in the memory 7.
In the automatic volume adjustment mode, the volume of the controlled device is automatically controlled so that the output voltage read from the memory 7 and the output voltage of the amplifier 3 match. Therefore, after being stored in the memory 7, when the listener changes his/her location, by carrying the remote control transmitter 1, the volume will be automatically adjusted to the optimal volume at that location.
Furthermore, even if the modulation degree on the broadcasting station side changes, the volume will be automatically adjusted to the optimal volume.

<Effects of the invention> As described above, according to the invention, the remote control transmitter includes a microphone, an amplifier that amplifies the output of the microphone, and a memory that stores the output level of the amplifier when the volume is set to the optimum level. Since the volume of the controlled device is controlled so that the output level of the amplifier matches the output level of the amplifier in the optimal volume state read from the memory, when the listener changes position, By carrying the remote control transmitter, the volume will be automatically adjusted to the optimal level at that location, and even if the modulation degree of the broadcasting station changes, the volume will be automatically adjusted to the optimal volume. It turns out. This eliminates the need to manually repeat the adjustment operation as in the past.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of an embodiment of the present invention. 1...Remote control transmitter, 2...Microphone,
3...Amplifier, 6...A/D converter, 7...Memory, 8...D/A converter, 9...Comparator,
11...Control circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A remote control transmitter that controls the volume of a controlled device, which includes a microphone, an amplifier that amplifies the output of this microphone, and an A/D that converts the output of this amplifier from analog to digital. a converter, a memory into which digital data from the A/D converter is written when the volume of the controlled device is adjusted to an optimal state, and a memory corresponding to the optimal volume state read from this memory. D/A converts digital data to D/A
a converter; a comparison circuit that compares the output level of the D/A converter and the output level of the amplifier; and a comparison circuit that compares the output level of the D/A converter and the output level of the amplifier based on the output of the comparison circuit. and a control circuit that outputs a control signal for adjusting the volume of the controlled device so that the volume of the controlled device matches the volume of the controlled device.