JPH0744097Y2 - Electronic equalizer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a memory calling method of an electronic equalizer device, particularly a vehicle-mounted graphic equalizer.

[Summary of Invention] When the preset scan switch is turned on once, the equalizer curves stored in the graphic equalizer microcomputer are sequentially called, and the equalizer curves are held for a predetermined time and the display device displays each equalizer curve. The sensor tone is generated for each change.

[Prior Art] In a conventional vehicle-mounted graphic equalizer having a function of storing a plurality of equalizer curves, when the equalizer curve stored in the graphic equalizer in advance is called to change the equalizer curve, it is conventionally provided in the graphic equalizer. By turning on the switch of the memory channel of the desired equalizer curve among the memory channel switches, the equalizer curve is called.

[Problems to be solved by the invention] However, according to such a conventional memory calling method, when the number of memory channels is increased, it is difficult to remember which equalizer curve is stored in which channel. I had to turn the switch on and check the equalizer curve until the desired equalizer curve was called. It was very difficult and dangerous to perform the operation of searching for the equalizer curve while checking the contents of each memory until the desired equalizer curve is obtained, especially while driving in the vehicle interior.

For this reason, it is conceivable to adopt a method of sequentially reading out the equalizer curve, but even in that case, it is difficult to confirm the change of the equalizer curve only by hearing, and the above danger cannot be solved.

Therefore, the object of the present invention is to turn on the switch only once to reduce the troublesome operation such as the conventional memory calling method, and the equalizer curves stored in the respective memory channels of the graphic equalizer are automatically and sequentially arranged. It is intended to simplify the operation of calling the memory in the passenger compartment by switching to, and being able to clearly grasp the change by listening.

[Means for Solving the Problems] In order to achieve the above object, the present invention stores a preset scan switch, a memory storing a plurality of equalizer curve data, and a memory stored in the memory based on an operation of the preset scan switch. The preset scan control means for sequentially calling the equalizer curve data at predetermined time intervals, the display means for graphically displaying the called equalizer curve, the electronic volume for changing the resistance value according to the called equalizer curve data, and the preset scan And a sensor tone generating means for generating a predetermined sensor tone each time the equalizer curve data is called from the memory by the control means. The electronic volume is connected to an equalizer circuit and an acoustic machine is connected to the electronic volume. It is characterized by connecting the input and output of the vessel.

[Operation] When the preset scan switch is turned on, a sensor tone is generated each time the equalizer curve is sequentially called from the memory and is graphically displayed, and each equalizer curve is held for a predetermined time, and the resistance of the electronic volume is adjusted according to the equalizer curve. The value is changed. When the desired equalizer curve is obtained, the above switch is turned off. An input signal from the audio device is equalized by the electronic volume according to a desired equalizer curve and output to the audio device.

[Embodiment] The present invention will be described below with reference to an embodiment shown in the drawings.
In FIG. 1, 1 is a microcomputer, 2 is an electronic volume, 3 is an equalizer circuit, 4 is an audio device, 5
Is a display circuit, 6 is a display device, and 7 is a preset scan switch.

The microcomputer 1 comprises, for example, as shown in FIG. 2, an arithmetic circuit CPU, a preset memory M, a timer T, a clock signal oscillator OSC, a comparator COM, and a reset circuit R. The electronic volume 2 is connected to the equalizer circuit 3, and by changing the resistance value according to the data from the microcomputer 1, the equalizing characteristic can be changed. An input signal from the audio device 4 is given to the electronic volume 2, equalized, and output to the audio device 4.

A plurality of equalizer curves are stored in the memory M in the microcomputer 1, and when the preset scan switch 7 is turned on, each equalizer curve is sequentially called every 3 seconds, and the data is given to the electronic volume 2. The electronic volume 2 changes the resistance value according to the data, equalizes the input signal from the audio device 4 according to the data of the called equalizer curve, and outputs the equalized signal to the audio device 4.

At the same time, the data of each equalizer curve is sequentially sent from the microcomputer 1 to the display circuit 5, and the display device 6 is synchronized with the change in the resistance value of the electronic volume 2.
Display each equalizer curve on.

When the desired equalizer curve is obtained, the preset scan switch 7 is turned off at that time.

Then, the data of each equalizer curve is also sent to the sensor tone generation circuit 8, and a predetermined sensor tone is generated every time the equalizer curve is changed.

Also, the equalizer curve is called from the memory M,
As described above, it is held for, for example, 3 seconds, which is achieved by the timer T, the clock signal oscillator OSC, the comparator COM and the reset circuit R.

FIG. 3 shows a flow chart of the microcomputer for performing the above-mentioned operation. It is assumed that the preset memory number N = 5, the memory holding time t = 3 seconds, and the preset value called when the switch 1 is off is held. .

[Effects of the Invention] As described above, according to the present invention, a plurality of equalizer curves can be sequentially called by turning on the preset scan switch once, so that a desired equalizer curve can be detected in a short time. Yes, the memory recall operation is simple, and a predetermined sensor tone is generated each time the equalizer curve is recalled.
The change of the equalizer curve can be surely heard by hearing, so that it is particularly applied to the on-vehicle graphic equalizer to improve the safety during driving.

Moreover, if the sensor tone is generated every time the data of the equalizer curve to be called is given, it is not necessary to add a new circuit and the circuit configuration can be simplified.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing one configuration example of the microcomputer, and FIG. 3 is a flowchart for explaining the operation of the microcomputer. Is. 1 …… Microcomputer 2 …… Electronic volume 3 …… Equalizer circuit 4 …… Sound equipment 5 …… Display circuit 6 …… Display device 7 …… Preset scan switch

Claims (1)

[Scope of utility model registration request] 1. A preset scan switch, a memory that stores a plurality of equalizer curve data, and a preset scan that sequentially calls the equalizer curve data stored in the memory based on an operation of the preset scan switch. Control means, display means for graphically displaying the called equalizer curve, electronic volume for changing the resistance value according to the called equalizer curve data, and each time the equalizer curve data is called from the memory by the preset scan control means. And a sensor tone generating means for generating a predetermined sensor tone, wherein the electronic volume is connected to an equalizer circuit and an input / output of an audio device is connected to the electronic volume. Homogenizer apparatus.