JPH01307984A - On-vehicle electronic apparatus - Google Patents

Abstract

PURPOSE:To effectively utilize a narrow escutcheon by providing an optical element installing part which has been formed so that it can be lighted from a light transmissive window, and installing simultaneously a photodetector of an ADS and a photodetector of an ATS, etc., in its inside. CONSTITUTION:In an optical element installing part 3, an anti-theft system (ATS) indicator 9, and an automatic light quantity control system (ADS) photosensor 10 are provided on the lower part of a light transmissive window 5, and on its opposite side, respectively, by setting a foot part 6b of a T-shaped part 6 as a partition, and both of them are fixed to a printed board 8, and connected electrically to control circuits of the ATS and the ADS, respectively. When an acoustic apparatus is operating, light of the periphery is received from the light transmissive window 5, reflected in the horizontal direction of the upper plate part of the T-shaped part 6 by the tapered surface 7a and irradiates the tapered surface, reflected thereby and reaches the ADS photosensor 10. Subsequently, the ADS photosensor 10 detects brightness of the periphery, and transmits lighting information required for the ADS through the control circuit. In such a way, a limited escutcheon can be utilized effectively.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to improvement of in-vehicle electronic equipment.

Conventional technology] Conventionally, in in-vehicle audio equipment, automatic light amount control systems (or auto-damer systems, hereinafter referred to as ADS) have been used to automatically adjust the lighting of escutcheons using optical sensors.
> has been adopted. This ADS has a lighting hole for a light sensor in the escutcheon, and a light-receiving element that detects the surrounding brightness inside the lighting hole. Using this light receiving element, the ADS adjusts the illumination of the light emitting display section according to the surrounding brightness. The light-emitting display unit adjusted by such an ADS is provided at a sufficient distance from the light-receiving element so that the light does not reach the ADS light-receiving element.For example, in the case of in-vehicle audio equipment, the following There is something. In other words, cassette tape running direction indicator and FF/REW
There are indicators or function selection indicators, and recently, in response to the demand for multi-functionality, graphic equalizers, spectrum analyzers, etc. are also installed as light-emitting display parts.

Incidentally, in recent years, there have been many cases in which in-vehicle audio equipment has been stolen, and therefore in-vehicle audio equipment equipped with an anti-theft system (or anti-shift system, hereinafter referred to as ATS) has been proposed.

This ATS is a system in which each in-vehicle audio device has a unique code, and the audio device will not operate unless that code is keyed in.

In general, audio equipment equipped with this ATS has an indicator on the escutcheon to highlight the fact. This indicator lights up when the vehicle key is turned OFF and the ACC power is turned off to provide only backup power, indicating that the audio equipment cannot be used even if it is stolen by unauthorized means. There is. In addition, the illumination of this indicator can be stopped by turning the vehicle key to the ACC power source again.

Incidentally, in-vehicle electronic devices, typified by in-vehicle audio devices, have standardized size standards and must be installed in extremely narrow spaces. Therefore, the area of the escutcheon is also very limited compared to the platform change equipment. On the other hand, in recent years, in-vehicle electronic devices have become more multifunctional, prompting the placement of various switches and indicators in narrow escutcheons. Therefore, in the ADS light receiving element,
Light-emitting switches and indicators may be placed in close proximity, and there is a risk that the ADS light-receiving element may receive light from the switches and malfunction.

Furthermore, it was not desirable from the standpoint of design.

[Problem to be solved by the invention] As described above, in the conventional technology, since the escutcheon is small, there is a limit to the number of indicators etc. that can be installed.
It has been difficult to install systems that require indicators into electronic devices.

The in-vehicle electronic device of the present invention has been proposed to solve such problems, and the purpose is to provide an excellent in-vehicle electronic device that effectively utilizes the limited escutcheon. .

[Means for Solving the Problems] In order to solve the above-mentioned problems, the in-vehicle electronic device of the present invention adjusts the brightness of the light-emitting display part according to the surrounding brightness while the device is in operation. It is equipped with an automatic light control system that adjusts the amount of light, and includes a light-transmitting window installed in the escutcheon, an optical element installation part formed on the back side of the escutcheon to allow light to enter through the light-transmitting window, and a part of the automatic light control system. The device is characterized in that it has a light receiving element which is arranged in the optical element installation part and detects light from the outside, and a light emitting element which is arranged in the optical element installation part and turns on when the device is inactive. .

[Function] The function of the present invention having the above configuration is as follows.

In other words, the light-emitting element installed in the optical element installation part of the ADS and turned on when the device is not in operation is turned off when the device is in operation, so that no optical noise is given to the light-emitting element of the ADS, and the two are mutually connected. They can coexist without interfering with each other. Therefore, it is possible to use one transparent window on the escutcheon in parallel. In other words, one indicator with two functions can be formed on the escutcheon,
As the functionality increases, so does the design.

[Example] An example of the present invention as described above will be specifically described based on the drawings.

That is, in this embodiment, a light emitting element that lights up when the audio equipment is not in operation is used for the ATS. As shown in FIG. 1, a front escutcheon 1 is provided with a lighting hole 2, an optical element installation section 3 is formed inside, and the left and right sides are partitioned by a shielding wall 1a. A transparent member 4 is provided in the optical element installation section 3.
is installed. As shown in FIG. 2, this light-transmitting member 4 has a cylindrical light-transmitting window 5 that fits into the lighting hole 2 near one edge of the upper plate portion 6a of the T-shaped portion 6. Furthermore, the upper plate part 6a of the T-shaped part 6 has a tapered surface 7a so as to laterally reflect the light entering from the transparent window 5, and the opposing surface also has a tapered surface 7b inclined at a similar angle. ing.

In other words, the upper plate portion 6a is formed from a rectangular parallelepiped with each surface being a parallelogram. Further, the foot portion 6b of the T-shaped portion 6 is
It is fixed on a printed circuit board 8 provided close to the back surface of the front escutcheon.

In addition, the optical element installation part 3 is provided with an ATS indicator 9 below the light-transmitting window 5 and an ADS optical sensor 10 on the opposite side, with the leg part 6b of the T-shaped part 6 as a partition.
Both are fixed to the printed circuit board 8, and are connected to ATS and AD, respectively.
It is electrically connected to a control circuit (not shown) of S.

In this embodiment having the above-mentioned closure, as shown in FIG. By,
The upper plate portion 6a of the T-shaped portion 6 is reflected laterally to form a tapered surface 7.
b, where it is reflected and reaches the ADS optical sensor 10. Then, the ΔDS optical sensor 10 detects the surrounding brightness and transmits the illumination information required to the ADS via the control circuit. At this time, the ATS indicator 9 does not operate, and there is no risk of applying light to the ADS optical sensor 10.

On the other hand, when the audio equipment is not in operation, the ADS does not need to operate, as shown in FIG. 3(B), and only the ATS operates. At this time, ATS indicator 9 lights up,
This light g can be clearly seen through the lighting window 5.

Since the front escutcheon 1 of this embodiment only has the lighting window 5 formed therein, the area occupied on the front surface is reduced, resulting in a beautiful design, and the number of members can be reduced, resulting in economical efficiency.

[Effects of the Invention] As described above, according to the in-vehicle electronic device of the present invention,
It is a simple configuration in which a single light-transmitting window is provided, an optical v2 is installed so that light can be brought in through the light-transmitting window, and a light-receiving element for ADS and a light-receiving element for ATS etc. are simultaneously installed inside this window. By making effective use of the narrow escutcheon, it is possible to provide an excellent in-vehicle electronic device that has multiple functions, has a small number of parts, and has a high design quality.

[Brief explanation of the drawing]

FIG. 1 is a plan sectional view of a main part of this embodiment, FIG. 2 is a perspective view of a light-transmitting member of this embodiment, and FIG. 3 (A). (B) is a plan sectional view showing the usage state of this embodiment, and FIG. 4 is a front view showing this embodiment. 1...Front escutcheon, 2...Lighting hole, 3...
- Optical element installation part, 4... Transparent member, 5... Transparent window, 6... T-shaped part, 7... Tapered surface, 8... Printed circuit board, 9... ATS indicator , 10...
ADS optical sensor, 6Q...light.

Claims (1)

[Scope of Claims] An automatic light amount control system that adjusts the brightness of the light emitting display according to the surrounding brightness while the device is in operation, comprising: a transparent window provided in the escutcheon; and a back surface of the escutcheon. An optical element installation part formed to allow light to enter through a transparent window on the side; a light receiving element that forms part of an automatic light amount control system and is installed inside the optical element installation part to detect light from the outside; and an optical element installation part. An in-vehicle electronic device comprising: a light emitting element that is provided inside the device and lights up when the device is inactive.