JPH08204662A - Acoustic equipment - Google Patents

Abstract

PURPOSE: To easily discriminate whether or not a mode of screen display is coincident with a key function mode, to easily discriminate whether or not the key is a valid key to the mode set at present and to easily distinguish to which mode the key function corresponds in the equipment having the mode of screen display dissident to the mode of key function. CONSTITUTION: The acoustic equipment having plural voice reproduction modes and keys to operate each mode is provided with a LED 17 whose lighting color is selected and lighting or indicating a key and a control circuit 18 revising a lighting color in response to the voice reproduction mode. Or the acoustic equipment having the voice reproduction mode, a display mode independently of the content of the voice reproduction mode and a key to operate each mode is provided with a LED 17 whose lighting color is selected and lighting or indicating a key and a control circuit 18 revising a lighting color in response to both the modes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio device in which one key shares operations in a plurality of modes.

[0002]

2. Description of the Related Art In portable and in-vehicle acoustic devices,
It has been conventionally practiced to allow one key to share operations in a plurality of modes for downsizing. For example, car stereos are commercially available that share a radio preset key and a cassette operation key. In recent years, CDs and MDs
The mode of FM multiplex broadcasting tends to be added. Along with this, sharing of keys for small audio devices will increase more and more.

[0003]

SUMMARY OF THE INVENTION In such a device,
Some keys are not related to the mode currently set, so it is difficult to know which one is valid. Further, in an on-vehicle audio device having an FM multiplex broadcasting mode, emergency broadcasting may be displayed by interrupting the cassette mode or the CD mode.
Also, the display is not always necessary in the cassette mode,
There is a device for displaying characters of FM multiplex broadcasting to utilize a display device. In such a case, even if the screen displays FM multiplex broadcasting, the key function may not be in the FM multiplex broadcasting mode, and an erroneous operation may be performed.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and a first feature thereof is an audio device having a plurality of audio reproduction modes and a key for sharing the operation of each mode. In the above, in the third aspect, there is provided a lighting unit capable of switching the lighting color and lighting or indicating the key, and a control circuit for changing the lighting color according to the audio reproduction mode.

The second feature is that the illumination color can be switched in an audio device having a sound reproduction mode, a display mode irrelevant to the contents of the sound reproduction mode, and a key sharing operation of each mode. In addition, an illumination unit for illuminating or indicating the key and a control circuit for changing the illumination color according to both modes are provided.

[0006]

The keys are color-coded according to the function mode of the key, regardless of the display mode.

[0007]

[Embodiment] An embodiment of the present invention is a cassette deck, FM / M
It is applied to a car stereo equipped with W radio and FM multiplex broadcasting, and will be described with reference to the drawings. The FM multiplex broadcasting is a service in which a digital signal is multiplexed with an FM stereo audio broadcasting to provide services such as characters, figures, audio and data. R in Europe
The DS system has been put to practical use, and the RBDS based on RDS has been standardized in the United States, and is being put to practical use in Japan so as to spread to navigation and pagers.

FIG. 1 is a block diagram showing the essential parts of the first embodiment. (1) is an FM receiving circuit, which comprises an FM front end (2), an FM-IF detector (3) and an FM stereo demodulation circuit (4). (5) is an MW receiving circuit, which comprises an MW tuner (6) and an MW-IF detector (7). The FM front end (2) and the MW tuner (6) amplify the signal received from the antenna (8) into a high frequency signal, mix the high frequency signal and the oscillation signal from the PLL circuit (9), and output the intermediate frequency signal (IF ) Is output.
The FM-IF detector (3) and the MW-IF detector (7) perform FM detection and M detection on the intermediate frequency signals output from the FM front end (2) and the MW tuner (6), respectively.
W detection is performed. The FM stereo demodulation circuit (4) is FM-I.
The L channel and R channel signals are reproduced using the stereo composite signal input from the F detector (3), and each channel signal is output. (10) is a multiplex signal detection circuit, which includes a multiplex filter (11) and a data demodulation circuit (1
2) consists of The multiplexing filter (11) removes a voice signal and a noise component from the output signal of the FM front end (2) and multiplexes the LMSK (Level) at 76 kHz.
controlled minimum shift keying) signal is extracted.
The data demodulation circuit (12) demodulates the LMSK signal into a displayable data signal, removes the level fluctuation of the LMSK signal, detects the synchronization signal, removes the PN code, and performs error correction.

Reference numeral (13) is an operation unit having a plurality of keys as shown in FIG. In this, tape key (K
1), FM multiple key (K2), AM / FM key (K3)
Are keys for selecting the respective modes, and when these keys are pressed, the functions assigned to other keys are as shown in FIG. For example, the "1 RPT" key is TA
When the PE key (K1) is pressed, the song in PLAY is repeated, when the FM multiple key (K2) is pressed, the item 1 displayed on the screen is selected, and when the AM / FM key is pressed, the preset It has the function of selecting the first station. Each key can be illuminated and this configuration is shown in the cross-sectional view of FIG.
The key (14) is injection-molded with a material that allows light to pass therethrough, and has characters printed on the outer surface side and light-diffusing wrinkles on the inner surface side. The upper portion (A) of the key (14) is welded to the panel (15), and can rotate about the notch (B) below the welded portion as a fulcrum. Key (1
The switch (16) comes into contact with the lower inner surface side of 4) and the key (14) is pressed to close the contact of the switch (16). An LED (17) is arranged on the inner surface side of the key (14). The LED (17) has a red light emitting element and a green light emitting element, and can perform red or green illumination. The switch (16) and the LED (17) are connected to the control circuit (18).

The control circuit (18) controls each section based on the operation section (13) and the multiple signal detection circuit (6). (19)
Is a ROM and stores a program for operating the control circuit (18). (20) is a RAM, which stores data necessary for the operation of the control circuit. Reference numeral (21) is a display device which displays character data of FM multiplex broadcasting, frequency and time of AM / FM broadcasting station, and the like. The number of displayed characters is 15.5 characters x 2 lines or more in accordance with FM multiplex broadcasting. Reference numeral (22) is a switch section, which is controlled by the control circuit (18) to generate the FM.
The amplifier circuit (25) of the speaker (24) is switched by switching between the output of the stereo demodulation circuit (4), the output of the MW-IF detector (7) and the output of the cassette deck (23).
Output to.

The main operation of the control circuit (18) in the above configuration will be described with reference to the flowchart of FIG.
FM multiple key (K2), which is a mode switching key, TAPE
It waits until either the key (K1) or the AM / FM key (K3) is pressed (S1, S2). FM multiple key (K
When 2) is pressed (Y of S1), the function assigned to the key (14) is set to FM multiplex mode (S3). Then, the color of the LED (17) related to FM multiplex broadcasting is changed to red (S4). That is, the key (1
Make 4) red illumination. Then, the screen of the display device (21) is set to the FM multiplex mode (S5). When the TAPE key (K1) or AM / FM key (K3) is pressed in step S2, the control circuit (18) starts counting the timer (S6), and the function assigned to the key (14) is T
The APE mode or AM / FM mode is set (S7). Then, the color of all LEDs (17) is changed to green (S
8). Set the screen of the display device (21) to TAPE mode or A
The M / FM mode is set (S9). At this time, the speaker (23) outputs a sound corresponding to the function of the key (14). When the timer of step S6 has passed 5 seconds (S10), only the screen of the display device (21) is set to the FM multiplex mode (S5).

The contents displayed in the TAPE mode or the AM / FM mode are the status of the TAPE, the frequency of the receiving radio band, etc., and are not always the data that must be always displayed. Therefore, in order to effectively utilize the display device (21), it is usually intended to display the FM multiplex. However, since the function of the key (14) is the TAPE mode or the AM / FM mode, there is a possibility that the key (14) may be operated by mistake in the FM multiplex mode. For this reason, when the function of the key is TAPE mode or AM / F mode, the illumination of all keys (14) is made green, and the FM
Keys (14) related to FM multiplexing when in multiplex mode
The illumination color of is changed to an unusual red color so that it can be discriminated whether or not the key function is related to the FM multiplex of the display. As a result, the confusion caused by the inconsistency between the contents of the display screen and the function of the key (14) can be resolved, and the erroneous operation of the key (14) can be prevented. In the above-described embodiment, the FM multiplex mode is displayed after 5 seconds, but a communication device that switches to the FM multiplex mode only when an FM multiplex emergency broadcast is received is also considered. The present invention can be applied to this device as well.

Next, a second embodiment will be described with reference to the drawings.
In the second embodiment, there is no mismatch between the contents of the display screen and the function of the key (14). The hardware configuration of the second embodiment is different from that of the first embodiment in that the LEDs can emit red, green and yellow light. FIG. 6 shows a control circuit (18)
3 is a flowchart showing the operation of FIG. As shown in the flow chart of FIG. 6, when the TAPE (K1) is pressed, the illumination of the key (14) related to this is made red and the invalid key (14)
Is turned off, and similarly, the FM multiplex key (K2) turns green and the AM / FM key (K3) turns yellow.

When the operation of a plurality of modes is shared by one key (14), the SC in the TAPE mode in FIG.
Some keys, such as the N UP key, are invalid in some modes (1
4) occurs. In this case, since the valid key (14) is illuminated and the invalid key (14) is not illuminated, it is possible to determine at a glance whether or not the valid key (14) is valid. Further, since the modes are color-coded, it is possible to prevent the key (14) from being operated by mistake in the other modes. These easy discriminations are particularly effective in a vehicle-mounted device.

As a method of discriminating the function of the key (14) by color, there is also a method of disposing an LED in the visible portion near the key (14), which is shown as a third embodiment in FIG. .

[0016]

In a device having a screen display mode that does not match the key function mode, it is easy to determine whether the screen display mode matches the key function mode. In addition, it is easy to determine whether or not the key is valid for the mode currently set. Further, it is easy to distinguish which mode the key function is. By these easy discriminations, operation confusion is eliminated and erroneous key operation is prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a display device and an operation unit according to the first embodiment.

FIG. 3 is a table showing key functions in each mode of the first embodiment.

FIG. 4 is a cross-sectional view showing an illumination unit according to the first embodiment.

FIG. 5 is a flowchart showing the operation of the control circuit of the first embodiment.

FIG. 6 is a flowchart showing the operation of the control circuit of the second embodiment.

FIG. 7 is a diagram illustrating a display device and an operation unit according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 FM receiving circuit 5 MW receiving circuit 9 PLL circuit 10 Multiplex signal detection circuit 13 Operation part 17 LED 18 Control circuit 21 Display device 24 Speaker

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area H04S 7/00 Z // G11B 20/00 F

Claims (2)

[Claims] 1. An audio device having a plurality of audio reproduction modes and a key for sharing operations of the respective modes, an illumination unit capable of switching illumination colors and illuminating or indicating the key, and the audio reproduction mode. An audio device comprising a control circuit for changing the illumination color according to the above. 2. An audio device having an audio reproduction mode, a display mode irrelevant to the contents of the audio reproduction mode, and a key for sharing operations of the respective modes. An acoustic device comprising: a lighting unit for lighting or indicating; and a control circuit for changing the lighting color according to both modes.