JPH0813621B2 - Vehicle interior lighting - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle interior lighting device for locally illuminating a door wall portion of a passenger car.

2. Description of the Related Art Illumination of a door wall in a passenger car has been a general lighting of a vehicle interior space by a ceiling light and each seat light in the vehicle interior.

Problems to be Solved by the Invention General lighting fixtures such as the ceiling lights and the seat lights are installed near the ceiling in the passenger compartment, and the door wall cannot be locally illuminated exclusively. For this reason, the general lighting fixtures are designed to illuminate the interior space of the vehicle while driving, and to obtain an illuminance of 10 [1x] or more, which is an illuminance level above the mesopic level, where the color and shape of objects can be seen on the door wall surface. When the radiant flux of the vehicle is increased, the spatial illuminance in the vehicle interior above the waistline is increased, and the level of visual adaptation of the driver is increased, which makes it difficult to see the outside of the vehicle. Also, the outside of the window glass surface on the door wall surface of the same door is used to check the transmittance of the window glass.
Even if it is estimated to be 70%, it is 7 [1x], and considering that general lighting fixtures such as ceiling lights and seat lights are installed above the interior of the vehicle, it is possible that more light will leak outside the vehicle. By this, the raindrops on the windshield are irregularly reflected. As a result, a problem occurs with respect to the vehicle running. Furthermore, the passenger compartment becomes unnecessarily bright, and the privacy of the passenger cannot be protected. However, at present, the illuminance of the door wall surface is insufficient, the texture of the interior material of the wall surface is not good, it is difficult to operate the operation tools attached to the wall surface, and the darkness of the irradiation direction causes hand darkness on the door wall surface. . There was a problem that there was no sense of expanse in the lateral direction of the passenger compartment.

The above-mentioned problem arises because there was no vehicle interior lighting device optimized for the purpose of locally illuminating the door wall of a passenger car.

The present invention has been tried in view of the above-mentioned problems, and locally illuminates the door wall portion of a passenger car exclusively, and creates an illumination environment of the door wall portion without increasing the space illuminance in the vehicle interior above the waistline. By being able to control independently,
Even while a passenger car is running, the door wall is safely illuminated with sufficient illuminance, the attachment position is optimized, the direction of light rays that cause regular reflection glare on the wall of the occupant is not generated, and the glare is generated by the light source of the door wall. Is blocked, and the shadow of the occupant is not reflected on the door wall to prevent darkness in a wide range of the wall surface, and to create a sense of material of the interior material of the door wall. An object of the present invention is to provide a vehicle interior lighting device that improves the workability of door wall parts.

Still another object of the present invention is to improve the efficiency of achieving the above-described object by detecting the light quantity of the environment outside the vehicle and changing the brightness of the environment light outside the vehicle by the lighting control unit. An object of the present invention is to provide a vehicle interior lighting device that automatically adjusts the brightness as the apparent brightness of the door wall surface stabilizes according to the level of visual adaptation.

Means for Solving the Problems In the present invention, a passenger car has a linear light emitting surface having a major axis substantially parallel to the front and rear axles of the passenger car,
The illumination light from the wall surface of the door should be within 45 ° of the vertical axis from the ceiling of the passenger car to the floor, and the incident angle should be within 20 ° to the wall of the door. One or more illumination lamps for which light distribution is controlled are provided for each door, and a power supply unit for supplying power to the illumination lamps and a lighting control unit for controlling the lighting level of the illumination lamps are provided. It is characterized in that a vehicle interior lighting device for illuminating the vehicle is provided. In addition to the above invention, if an optical sensor is used, it is possible to sense the amount of light in the environment outside the vehicle and perform automatic light control by the lighting control unit.

With the configuration described in the present invention, unlike the lighting environment in which the door section is obtained by the general lighting, by installing a local lighting device on the door wall surface on the door wall section, the spatial illuminance in the vehicle interior above the waistline It is possible to independently control the lighting environment of the door wall without increasing the illumination. In addition,
When the light emitting surface is installed in a place other than the door wall, such as a door window frame, floor, ceiling, center pillar, front console, or rear seat, illumination light is emitted from the light emitting surface to the door in the vehicle interior space. By the time it reaches the wall, the longer the distance, the greater the chance of being blocked by occupants operating in a tight closed space. By installing a linear light emitting surface having a long axis substantially parallel to the door wall surface of a passenger car, it becomes possible to give sufficient horizontal plane illuminance and vertical plane illuminance to the door wall surface in a wide range, and the light is emitted from the light emitting surface. The illuminating light is controlled so that the light distribution is controlled from above 45 ° to the vertical axis standing on the floor from the ceiling of the passenger car, and when the incident angle to the door wall is within 20 °. It is possible to block the ray of light that causes the glare by the light source of the door wall illumination without generating the direction of the ray of light that causes regular reflection glare from the wall surface of the seated person to be viewed by the eye point. In addition, since it was possible to illuminate the wall surface of the occupant to be viewed from a diagonal direction that was close to horizontal, with a lighting device with a narrow light distribution, shadows caused by fine unevenness of the material of the wall surface to be viewed were generated. With the modeling effect that makes it stand out, it is possible to create a feeling of the interior material of the door wall surface. Further, even when the illumination light is blocked by an armrest, etc., if one or more of the light emitting surface is installed for each door, it is possible to obtain a sufficient horizontal and vertical illuminance over a wide range from the top to the bottom of the door wall. Can be given.

The illuminance in the interior of the passenger compartment is kept low, it can be safely turned on while driving, and a feeling of being spread laterally in the passenger compartment can be obtained. The shadow of the occupant is reflected on the wall surface so that there is no darkness. It is possible to improve the total lighting environment in the vehicle interior.

Furthermore, by using a light sensor, the amount of light in the driving environment is detected, and the lighting control unit automatically adjusts the light intensity,
An optimal lighting environment for the vehicle door wall can be obtained according to the environment outside the vehicle.

Example An example of the vehicle interior lighting device according to claim 1 will be described. FIG. 1 shows an example of mounting the vehicle interior lighting device of the present invention on a wall surface of a door. Reference numeral 4 in FIG. 1 is a door wall surface of the passenger car, and reference numeral 1 in FIG. 1 and reference numeral 5 in FIG. 2 showing the block diagram of the vehicle interior lighting device use a passenger car light bulb in the door wall portion of the passenger car. A light source and a prism block for arranging the light source as a linear light emitting surface having a long axis substantially parallel to the door wall surface of the passenger car are arranged, and the illumination light emitted from the light emitting surface is applied from above to the ceiling of the passenger car. It is an illuminating lamp with a light-shielding part for controlling the light distribution within 45 ° with respect to the vertical axis standing on the floor and within 20 ° with respect to the door wall. In FIG. 2, reference numeral 6 denotes a power supply unit for supplying electric power to the illumination lamp from a battery of a passenger car engine unit. In FIG. 2, 7 is the illumination lamp 5
Is a lighting control unit including a dimmer and a switch for switching lighting and extinction for controlling the lighting level of. In a passenger car, a vehicle interior lighting device that illuminates the vehicle door wall surface made up of these is installed.

In the present embodiment, the light emitting surface is a light bulb for passenger cars, and a prism block is combined, but a Fresnel lens,
It may be combined with a louver or a diffusion plate, and an optical fiber may be arranged and used as a light emitting surface. In addition, the light source is FL tube, EL
It may be an element or an LED element.

As described above, in the present embodiment, by providing the vehicle interior lighting device characterized by illuminating the door wall portion, it becomes possible to independently control the illumination environment of the door wall portion, and any of the door wall portions can be controlled. Realization of any illuminance level at that time,
A good lighting environment can be realized.

Further, in FIG. 1, reference numeral 3 denotes an armrest, and in a vehicle in which the armrest 3 is present, when the illumination light from the illumination lamp is blocked by the armrest 3, another illumination lamp is placed under the armrest 3. By providing the light, the door wall surface can be uniformly illuminated from the top to the bottom. In the present embodiment, an example of the armrest is given, but when there is an object that blocks the light rays from the illumination lamp,
By further providing the illumination lamp in the lower part of the object, the door wall surface can be uniformly illuminated from the top to the bottom.

Further, in FIG. 1, reference numeral 2 designates appliances existing on the door wall portion, which are illuminated secondarily by illuminating the wall surface by the illumination device.

Next, an example of the vehicle interior lighting device according to claim 2 will be described. Since the device of this embodiment has basically the same configuration as that shown in the embodiment of the vehicle interior lighting device according to claim 1, detailed description of the same components will be omitted. That is, in this embodiment, in addition to the configuration of the vehicle interior lighting device of the above embodiment, an optical sensor shown in FIG. 2 at 8 is added to detect the light quantity of the environment outside the vehicle, and the lighting control unit adjusts the visual adaptation level. The light is automatically adjusted accordingly.

For example, when the road surface brightness is about 0.1 [cd / m ² ] in a dark place where there is no ambient light outside the vehicle, the brightness of the wall surface of the vehicle interior door is 100 [cd / m
m ² ] ²⁾ Assuming that the occupant's vision adapts to the road surface brightness in order to obtain the same brightness, 1 [ft-L ] = 3.426 [cd /
m ² ], the apparent brightness is about 60.
Therefore, the wall surface of the vehicle interior door must be about 3 [cd / m ² ], and the road surface brightness is about 1 [cd / m ^{2 due} to the ambient light outside the vehicle.
m ² ], the upper limit of the comfortable brightness of the wall surface in a general room is 100 [cd / m ² ] while adapting to the brightness of the road surface in the vehicle environment, about 1 [cd / m ² ] in the vehicle interior. In order to obtain the superior brightness when accommodating to, the upper limit of the brightness of the interior wall of the vehicle interior must be increased to about 10 [cd / m ² ].
The brightness of the interior door walls is apparently stable.

As described above, in the present embodiment, by using the optical sensor, the amount of light in the environment outside the vehicle is sensed, and by providing the vehicle interior lighting device that automatically adjusts the light by the lighting control unit, it is possible to comply with the environment outside the vehicle. The illuminance level can illuminate the interior doors of the vehicle in accordance with visual adaptation, so not only the lights are turned off in the light and the lights are turned on in the dark, but the optimum visual environment is always maintained. Is obtained.

EFFECTS OF THE INVENTION As described above, according to the present invention, the door wall surface can be illuminated during traveling without hindering driving, and if it is turned on during traveling, the door wall portion is a surface element of the vehicle interior wall surface. Is illuminated over a wide range, it is possible to give a feeling of expanse in the lateral direction of the room. Then, it is possible to produce the material feeling of the interior material of the door portion. Further, there is no darkness in the door wall portion in the vehicle compartment, and it is easy to operate and check the appliances on the door wall portion, which gives a passenger a sense of security. Further, the interior wall of the vehicle interior can be illuminated according to the visual adaptation, so that an optimum visual environment can be obtained at all times during traveling. The above practical effects are very large.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of mounting the lighting device according to the present invention on a door wall surface, FIG. 2 is an explanatory view showing the arrangement of the lighting device in the vehicle, and FIG. 3 is a luminance used for deriving a visual adaptation level. It is a figure which shows the relationship of aperator brightness. 1 ... Lighting, 2 ... Door wall fixture, 3 ... Armrest, 4 ... Door wall, 5 ... Lighting, 6 ... Power supply, 7
...... Control unit, 8 ...... Optical sensor.

Claims (2)

[Claims] 1. A door wall portion of a passenger car having a linear light emitting surface having a major axis substantially parallel to the door wall surface of the passenger car,
Illumination controlled so that the illumination light emitted from the light emitting surface is within 45 ° with respect to the vertical axis standing from the ceiling of the passenger car to the floor from above, and the incident angle with respect to the door wall surface is within 20 °. One or more lights are installed for each door, and for illuminating the door wall surface of a passenger vehicle, which includes a power supply unit for supplying electric power to the illuminating lights and a lighting control unit for controlling a lighting level of the illuminating lights. Vehicle interior lighting device. 2. A light sensor is used to detect the amount of light in the environment outside the vehicle, and even if the brightness of the environment light outside the vehicle changes,
2. The vehicle interior lighting device according to claim 1, wherein the lighting control unit performs automatic light control so that the apparent brightness of the door wall surface becomes stable according to the visual adaptation level.