JPH0823583A - Sound volume control device - Google Patents

Abstract

PURPOSE:To perform the fine adjustment of sound volume by the repeating of a short button operation by performing the fine adjustment by defining an operation increasing and decreasing the speed of the change of sound volume by preliminarily determined speed as a basic one. CONSTITUTION:A motor 6 interlocking with volume 7 is controlled by a motor driver 5 and the volume 7 is controlled by the time width depressing an UP button 1a. In this case, for two seconds after a reception is started, for instance, a microcomputer 4 regards the reception of a remote control mode by receiving the second UP pulse P2 and a motor 6 is driven from a motor driver 5. The driving time of this motor 6 is determined as t2=t1+alpha. Subsequently, the first UP pulse 3 is waited, the motor 6 is again driven by an UP pulse 4 from the motor driver 5 and an operation is performed by regarding the reception of a remote control by the reception of a pulse while the UP button 1a of a remote control device 1 is depressed. When the remote control button is continuously depressed for two seconds or more, the volume 7 rotates for every pulse and rotates and operates at rapid speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to volume control by remote control of audio equipment and the like.

[0002]

2. Description of the Related Art FIG. 1 is a block diagram of volume adjustment by infrared remote control of an audio device or the like. Description will be given with reference to FIG. In the conventional device, when the volume UP button 1a of the remote controller (hereinafter referred to as "remote controller") 1 is pressed, the remote controller 1 transmits a remote controller code by infrared rays, and the audio device 2 receives the remote controller code by the light receiving element 3, and the microcomputer 4 receives the remote controller code. When the remote control code is transferred, the microcomputer 4 decodes the transferred remote control code and performs the corresponding operation.

At the time of volume UP, as shown in FIG. 7, the UP terminal (UP) of the output of the microcomputer 4 is LOW output and DOWN.
The terminal (DOWN) outputs a HIGH output, and the motor driver 5 rotates the motorized potentiometer 7 in the clockwise direction to increase the volume (hereinafter referred to as UP). Further, when the volume is reduced (hereinafter referred to as DOWN), as shown in FIG. 8, the UP terminal and the DOWN terminal output which are the outputs of the microcomputer 4 are opposite to those in FIG. 7, and the motor 6 is rotated counterclockwise to produce the volume. To D
OWN.

Further, the rotation of the volume 7 is stopped (S
TOP), as shown in FIG.
Both OWN terminal outputs are HIGH, and the motor driver 5 fixes the motor. That is, when either the output of the UP terminal or the output of the DOWN terminal becomes LOW, the motor starts rotating in a predetermined direction.

Next, the relationship between the reception of the remote control code and the UP terminal or the DOWN terminal will be described with reference to FIG.
When the UP button 1a of the remote controller 1 is pressed, the light receiving element 3 receives the UP codes P1 and P2 of the remote controller at a constant interval T1, and the microcomputer 4 decodes the remote controller code to set the UP terminal to LOW. The volume is lowered and the volume 7 is rotated by the motor driver 5 to increase the volume.

[0006]

In the prior art, as shown in FIG. 10, the microcomputer 4 uses the first UP of the remote control UP signal.
When the code P1 is decoded, the UP terminal output is lowered to LOW, the motor driver 5 is operated, the motor 6 is rotated clockwise, and the volume 7 is UP. When the remote control code disappeared, the UP terminal was returned to HIGH after the time T2 had elapsed since the remote control code disappeared, and the rotation of the volume was stopped (STOP). Generally, since the remote control code transmits pulses at intervals of 100 mS to 200 mS, even if the button on the remote controller 1 on the transmitting side is momentarily pressed, several remote control codes are output and the time volume corresponding to this is rotated. However, there is a drawback that the rotation angle of the motor 6 cannot be finely adjusted especially when the volume is increased.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above drawbacks, and includes a circuit for receiving a remote control code transmitted from a transmitting side and detecting the remote control code, and two or three circuits. It has a detection circuit that detects the number of received signals or the passage of time when the same remote control code is received, and fine adjustment is possible based on the operation of raising or lowering the speed of volume change to a predetermined speed It is a volume control device.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a volume adjusting device according to the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of an embodiment of a volume adjusting device according to the present invention, FIGS. 2 to 4 show timings of received pulses, and FIG. 5 shows a flow chart of a main part for performing volume adjustment. FIG. 6 shows an example of the relationship between the number of received remote control codes and the volume rotation angle when the volume is increased.
The remote controller 1 has an UP button 1a for up and a button 1b for down, and when these buttons are pressed and an operation instruction is given, the light receiving element 3 provided in the audio equipment 2 or the like receives the remote control code and the microcomputer 4 is used. The remote control code is decoded from the received signal to determine whether the volume is up or down, and the volume of the audio device 2 is adjusted accordingly.

The motor 6 which is interlocked with the volume 7 is controlled by the motor driver 5 so that the volume 7 is controlled by the time width of pressing the UP button 1a. UP button 1a on remote control 1
When is pressed, a pulse signal is transmitted by infrared rays at a predetermined fixed timing interval. At the timing t1 shown in FIG. 2, the UP pulse signal is repeatedly transmitted from the remote controller 1, and the audio device 2 receives the remote controller UP signals P1, P2, P3,
.. is received by the light receiving element 3 and signal processing is performed by the microcomputer 4 (S1).

In this case, from the start of reception until 2 seconds, the microcomputer 4 considers that the remote control code is received by receiving the second UP pulse P2 (S3), and the motor driver 5 drives the motor 6 (S4). . The drive time of this motor 6 is determined to be t2 = t1 + α (S5), after which the first UP pulse P3 is waited for, and the UP button 1a of the remote controller 1 causes the motor driver 5 to drive the motor 6 again with the UP pulse P4. When one pulse is received while the button is being pressed, the remote control code is considered to have been received and operated (S6).

In this way, by pressing the remote control button for (A pulse period) = 2 seconds or less, the volume 7 is driven by the second or third UP pulse. Fine adjustment is possible. Even when the remote control button is continuously pressed for 2 seconds or more, as shown in FIG. 3, the volume 7 rotates for each one, which is the same as the conventional one, and the volume 7 rotates at a high speed (S8).
When no UP pulse is received after the lapse of time t2, the drive of the volume 7 is stopped (S9).

Further, FIG. 4 is related to FIG. 2, and the second UP is performed by the microcomputer 4 for continuous remote control code reception.
An example in which A shown in FIG. 6 is set to 7th UP pulse P7 or more (remote control code number A> 7) so as to be controlled by a pulse, and the volume 7 is increased at a continuous and slow speed As shown, the number of predetermined UP pulses A
It is possible to obtain a slow rotation speed of the volume 7 by repeating the transmission for a short period up to. Time t1 in the figure indicates the interval between the remote control transmission code and the transmission code, and t2 indicates the time for rotating the volume.

FIG. 6 shows the relationship between the number of received codes and the volume rotation angle by the processing in the microcomputer 4. The ratio between the number of remote control codes and the rotation angle is 2: 1 or 3: 1 up to point A. A predetermined ratio is set by inputting signal processing by the microcomputer 4 in advance using the operation buttons (not shown) of the remote controller 1 or audio equipment 2. It rose to 1: 1 from the time it exceeded point A.

[0014]

According to the present invention, since the changing speed of the rotation angle of the volume control is changed with the passage of time during the button operation of the remote controller, the volume can be finely adjusted by repeating the short button operation.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a configuration of a remote controller and an audio device.

FIG. 2 is a diagram for explaining the volume adjustment control timing of the volume adjusting device of the present invention.

FIG. 3 is a diagram for explaining the volume adjustment control timing of the volume adjustment device of the present invention.

FIG. 4 is a diagram for explaining the volume adjustment control timing of the volume adjusting device of the present invention.

FIG. 5 is a flow chart for adjusting the volume of the volume adjusting device of the present invention.

FIG. 6 is a diagram showing changes in the volume rotation angle of the volume control device of the present invention.

FIG. 7 is a diagram showing control in a conventional volume adjusting device.

FIG. 8 is a diagram showing control in a conventional volume adjusting device.

FIG. 9 is a diagram showing control in a conventional volume adjusting device.

FIG. 10 is a diagram showing control in a conventional volume adjusting device.

[Explanation of symbols]

 1 remote control 1a UP button 1b DOWN button 2 audio equipment 3 light receiving element 4 microcomputer 5 motor driver 6 motor 7 volume

Claims (1)

[Claims] 1. An apparatus having means for receiving a remote control signal to adjust the volume, a means for receiving the remote control signal, a detection circuit for detecting the passage of time of the received signal, and the detection circuit. A volume adjusting device comprising means for setting a speed at which the volume changes according to the detected time to a predetermined speed, and finely adjusting the volume by repeatedly performing remote control.