JPH0632190U - Lighting equipment for in-vehicle audio equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To illuminate the car stereo with good visibility during the day and at night, and prevent it from being too dazzling at night. [Structure] Red and blue illumination means 4 and 5 are arranged behind a transmissive liquid crystal display panel 3 of a car stereo, respectively. Illuminated to improve visibility and
And / or at night when the headlight 25 is turned on, it is illuminated with blue color to prevent excessive glare, prevent interference with the visibility of vehicle instruments, and ensure safety.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lighting device for vehicle-mounted audio equipment such as a car stereo.

[0002]

[Prior art]

 In the conventional on-vehicle audio equipment, a light source is arranged behind a light-transmissive liquid crystal display panel that displays its operating state. The brightness of the light source is set high in order to improve visibility even in the daytime under sunlight.

[0003]

[Problems to be solved by the device]

 According to the above-mentioned prior art, at night, the display panel becomes too bright and dazzling to reduce the visibility. In addition, the instrument panel of the vehicle is installed adjacent to the vehicle-mounted audio device. It is dangerous because it hinders the visibility of the instruments and makes it difficult for the driver to check the safety ahead.

An object of the present invention is to provide an illumination device for an on-vehicle audio device, which is capable of appropriately adjusting the brightness of illumination of the on-vehicle audio device to improve visibility and improve vehicle safety. Is to provide.

[0005]

[Means for Solving the Problems]

 The present invention relates to a lighting device for an on-vehicle audio device provided in a vehicle interior, wherein a first illuminating unit having a first color for illuminating a display part of the on-vehicle audio device, and illuminating the display part of the on-vehicle audio device. The second lighting means having a second color having a shorter wavelength of light than the first color, a means for deriving a switching signal representing the brightness outside the vehicle interior, and a vehicle for responding to the switching signal, When the outside of the room is bright, the first illuminating means is turned on, the second illuminating means is turned off, and when it is dark, the first illuminating means is turned off and the second illuminating means is turned on. It is a characteristic lighting device for an on-vehicle audio device.

[0006]

[Action]

 According to the present invention, when the switching signal indicating that the outside of the vehicle compartment is bright, such as daytime under sunlight, is derived, the control means causes the first lighting means to emit the first color, for example, red. Is generated to illuminate the display section of the on-vehicle audio equipment, and thereby visibility can be improved even in the daytime.

In addition, when the outside of the vehicle compartment is dark, for example, at night, the second illumination means generates the second color to illuminate the display section. The second color has a wavelength shorter than that of the first color, for example, blue, so that the second color does not become too dazzling and the visibility is kept good. In addition, the visibility of vehicle instruments such as the instrument panel adjacent to the in-vehicle audio equipment is not obstructed, and the driver can see the front reliably and the safety is improved. To do.

[0008]

【Example】

 FIG. 1 is an electric circuit diagram of an embodiment of the present invention. A car audio device such as a magnetic tape reproducing device called a car stereo has a cross section of a part thereof as shown in FIG. 3 is provided to form a display unit, behind which is provided a first illuminating unit 4 for illuminating with a first color red, and a second color having a shorter wavelength of light than the first color, For example, the second illumination means 5 for illuminating with blue is arranged. The liquid crystal display board 3 indicates the operating state of the vehicle-mounted audio equipment 1, for example, the running direction of the magnetic tape, and reproduction, fast-forwarding and rewinding. Such an audio device is arranged in front of the driver's seat in the vehicle compartment so that the driver can operate it to see the liquid crystal display panel 3. Adjacent to the audio equipment 1, vehicle instruments such as a speedometer are arranged on the instrument panel.

The first lighting means 4 includes an incandescent lamp 6, a red filter 7, and a light guide member 8 made of a translucent material such as polycarbonate. The second lighting means 5 includes an incandescent lamp 9 similar to the incandescent lamp 6 described above and a blue filter 10, and the blue light is guided by the light guide member 8. When the incandescent lamp 6 or 9 is turned on, the liquid crystal display panel 3 is illuminated with red or blue.

Electric power from the battery 11 mounted on the automobile is supplied from the IG contact 13 of the ignition key switch 12 to the power switch 15 of the audio device 1 via the line 14. By connecting the switch 12 to the starting contact 16, the internal combustion engine starting motor 17 is driven. The movable contact 18 supplies the electric power by switching the electric power of the battery 11 only to the accessory contact 34, the accessory contact 34 and the IG contact 13, and cuts off the supply of such electric power.

The vehicle is also further provided with a switch 19, a dimmer contact 21 which can be connected to the movable contact 20, and a contact 22 for the headlight. When the electric power from the battery 11 is conducted to the dimmer contact 21 via the movable contact 20, the electric power is supplied to the line 23, the side lamp 24 is turned on, and the vehicle provided on the instrument panel is also turned on. The lighting means 25 for the instruments is turned on. When the movable contact 20 is conducted not only to the dimmer contact 21 but also to the contact 22 for the headlight, the headlight 26 is further turned on. The battery 11 is charged by a generator driven by an internal combustion engine.

In the audio device 1, the audio device main body 27 that runs and reproduces the magnetic tape is supplied with power from the line 14 via the power switch 15 via the line 28, and the line 28 also receives the transistor 29. Is connected to the incandescent lamp 6 via. The line 28 is also connected to another incandescent lamp 9 via a transistor 30. The line 23 connected to the dimmer contact 21 of the switch 19 is connected to the base of the inverting transistor 31, and the output of the transistor 31 is connected to the control transistor 32 connected to the base of the transistor 29. The line 23 is also connected to the control transistor 33 connected to the base of the transistor 30. The IG contact of the switch 12 also supplies power to the spark ignition circuit for the internal combustion engine.

During daytime under sunlight, the movable contact 18 of the switch 12 is connected to the IG contact 13 and the movable contact 20 of the other switch 19 is disconnected from the contacts 21 and 22 while the vehicle is running. ing. In this state, by turning on the power switch 15 of the audio equipment 1, electric power is supplied to the audio equipment main body 27, and operations such as magnetic tape reproduction, fast forward, and rewind can be performed. At this time, the transistor 31 is cut off, so that the base of the transistor 32 becomes high level and conducts, so that the switching transistor 29 conducts and the incandescent lamp 6 constituting the first illuminating means 4 lights up. As a result, the liquid crystal display panel 3 is illuminated with red. This red color looks bright to the driver's eyes, so that the liquid crystal display panel 3 can be seen with good visibility even in the daytime. At this time, the transistor 33 is cut off, therefore the switching transistor 30 is cut off, and the incandescent lamp 9 constituting the second lighting means 5 is turned off.

When the outside of the vehicle compartment is dark, such as at night, while the vehicle is running, the movable contact 20 of the switch 19 is electrically connected to the dimmer contact 21 and further to the headlight contact 22. The inverting transistor 31 is turned on, so that the transistor 32 and thus the switching transistor 29 are turned off and the incandescent lamp 6 is turned off. At this time, the transistor 33 becomes conductive, so that the switching transistor 30 becomes conductive and the incandescent lamp 9 lights up. Therefore, the liquid crystal display panel 3 is illuminated with blue color, which prevents the driver from being too dazzling and obtains good visibility. At this time, the lighting means 25 of the vehicle instruments visible to the driver is also turned on, and the incandescent lamp 9 is not too dazzling, so that the vehicle instruments can be seen with good visibility and safety. The property is improved. In this way, the blue lighting provided by the lamp 9 eliminates the excessive glare as described above, which allows the driver to see the front accurately, which also improves safety. It

FIG. 3 is an electric circuit diagram of another embodiment of the present invention. This embodiment is similar to the previous embodiment, and the corresponding parts bear the same reference numerals. It should be noted that in this embodiment, a processing circuit 36 such as a microcomputer is provided, and a low level signal is output to the line 37 in a bright time zone such as daytime, that is, from 8 am to 5 pm. In other time zones, that is, when the outside of the passenger compartment is dark, a high level signal is derived to the line 37. The operation of such a processing circuit 36 is shown in FIG.

From step a1 to step a2, as described above, the line 37 is set to the low level in step a3 in the time zone of 8:00 am to 5:00 pm, and in the other time zones, in step a5. The line 37 is set to the high level as described above. In the time zone from 8 am to 5 pm, since the line 37 is at the low level, the transistor 31 is cut off, the transistors 32 and 29 are turned on, the incandescent lamp 6 is turned on, and red display is performed. At this time, the transistors 33 and 30 are cut off, and the incandescent lamp 9 is off. At times other than 8 am to 5 pm, line 37 is at high level, so transistor 31 conducts, which causes transistors 32 and 29 to shut off and incandescent lamp 6 to go off. The transistors 33 and 30 are turned on by the signal, and the incandescent lamp 9 displays blue.

FIG. 5 is an electric circuit diagram of still another embodiment of the present invention. Although this embodiment is similar to the above-mentioned embodiment, it should be noted that the switching signal representing the brightness outside the passenger compartment is realized by the structure including the solar cell 38. The solar cell 38 generates a voltage of, for example, 3 to 5 V by being irradiated with daytime light, and its output is given from the diode 39 to one input of the comparison circuit 40. The threshold voltage VTH set by the resistors 41 and 42 is applied to the other input of the comparison circuit 40.

When the outside of the passenger compartment is bright, the output of the solar cell 38 becomes equal to or higher than the threshold voltage VTH, which causes the comparison circuit 40 to output the low level output to the line 37, which is why the above-described operation is performed. Similar to the example, the incandescent lamp 6 is turned on to display a red color, and the incandescent lamp 9 is turned off. When the output voltage of the solar cell 38 falls below the threshold value VTH at night, the comparison circuit 40 outputs a high level signal to the line 37, which turns off the incandescent lamp 6 in the same manner as in the above-described embodiment. Then, the incandescent lamp 9 is turned on and blue display is performed.

Instead of the incandescent lamp 6 and the red filter 7, a light emitting diode that emits red light may be used, and instead of the combination of the incandescent lamp 9 and the blue filter 10, a light emitting diode that emits blue light may be used. . Although a combination of red and blue is used in the above-described embodiment, for example, a combination of red and green may be used, or another color combination may be used.

In the above-described embodiment, the present invention is implemented for illuminating the liquid crystal display panel 3, but as another embodiment of the present invention, the present invention is implemented for displaying the position of the push button switch. However, other changes are also possible.

[0021]

[Effect of device]

 As described above, according to the present invention, when the outside of the vehicle compartment is bright, such as in the daytime, the display unit is illuminated with the first color, for example, red, and the visibility can be improved. Also, when the outside of the vehicle compartment is dark, such as at night, the display is illuminated with a second color that has a shorter wavelength than the first color, for example, blue, which improves night visibility. In addition to the above, it is possible to prevent interference with the visibility of vehicle instruments installed adjacent to the on-vehicle audio equipment, and to ensure that the driver can see the outside of the vehicle, which improves safety. To be done.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a configuration including first and second illumination means 4 and 5.

FIG. 3 is an electric circuit diagram of another embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of the processing circuit 36 of the embodiment shown in FIG.

FIG. 5 is an electric circuit diagram of still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 In-vehicle audio equipment 3 Liquid crystal display board 4 1st lighting means 5 2nd lighting means 6,9 Incandescent lamp 7 Red filter 10 Blue filter 12,19 Switch 36 Processing circuit 38 Solar cell 40 Comparison circuit

Claims (1)

[Scope of utility model registration request] 1. A lighting device for an on-vehicle audio device provided in a vehicle compartment, comprising: a first illuminating means having a first color for illuminating a display part of the on-vehicle audio device; and the display part of the on-vehicle audio device. Second illuminating means having a second color having a shorter wavelength of light than the illuminating first color, means for deriving a switching signal representing the brightness outside the vehicle interior, and responsive to the switching signal, When the outside of the passenger compartment is bright, the first illuminating means is turned on and the second illuminating means is turned off. When it is dark, the first illuminating means is turned on.
A lighting device for an on-vehicle audio equipment, comprising: a control means for turning off the lighting means and turning on the second lighting means.