DE202013010278U1 - Lighting system for a glove box of a vehicle - Google Patents

Abstract

Lighting system for a glove box of a vehicle with dimming of a light source, the switching on and off of which takes place via a switch which can be actuated by means of a movable part, in particular a flap, characterized in that a circuit arrangement (7) comprising a network of several resistors (10, 11, 12, 13), one or more capacitors (14) and two transistors (8, 9), is provided and the circuit arrangement (7) is arranged in series with the light source (2) and the switch contact (6) of the switch (5) is.

Description

The invention relates to a lighting system for a glove box of a vehicle with slowly increasing by dimming brightness of a light source, the switching on and off via a means of a movable part, in particular a flap, operable switch.

Such containers are used in vehicle interiors and have at least one illumination source. This usually takes place in the front area of the vehicle interior. The purpose of this lighting source is to automatically illuminate the tray when it is opened.

Is known from the DE 20 2007 011 316 U1 a lighting device for shelves or compartments, in particular in the interior of vehicles, comprising a light source, an antenna and / or sensor device for generating an electric field and / or detecting a movement in and / or by an electric field or the field electric field comprises, wherein the antenna and / or sensor device has a first side and opposite the first side a second side, and at least one control unit for controlling the circuit of the light source and the operation of the antenna and / or sensor device, wherein the control unit with the light source and the antenna and / or sensor device is connected.

The switching on and off of the light source does not take place here via a switch but via a sensor, when a person, for example, carries out a movement in the detection range of the sensor by hand. This means that the light source is not switched on when opening the glove box, but only by a movement in the area of a sensor.

From the DE 19830873 A1 a method for controlling the interior lighting of vehicles is known, wherein from a central control unit both an actuator of a Zentralverrieglung and the interior lighting is jointly controlled to activate the interior lighting when locking the Zentralverrieglung.

From the output of the central control unit leads a supply line to both the actuator and the means for lighting. The actuator is connected via a further line to the central control unit, while the means for illuminating the interior, for example, are connected to ground. Under interior lighting here is the passenger compartment lighting, the lighting in the trunk, in the glove box or the like to understand. The means for the illumination of the interior is associated with a controllable by the central control unit means for luminous intensity control.

The DE 10 2008 006 505 A1 describes a touch-activated LED lighting circuit. This includes an LED illumination source for providing vehicle lighting. A touch switch antenna includes the user input for activating or deactivating the LED illumination source. An integrated circuit is mounted on a printed circuit board to control the power supplied to the LED lighting source. The integrated circuit communicates with the touch switch antenna to detect the user input.

A drive circuit is mounted on the circuit board and electrically connected to the LED illumination source to operate the LED illumination source. The integrated circuit includes a battery voltage input and a temperature input at which the integrated circuit receives detection signals to variably control the signal input to the drive circuit and thus the current conducted to the illumination source.

The DE 10 2008 010 320 A1 discloses a circuit arrangement for driving a plurality of series-connected LEDs, wherein also in series with the LEDs, a central switching element and a current detection resistor is switched. A control circuit is used to set and control a current through the plurality of LEDs. The control circuit can make a current limit during operation. It is also possible to bridge individual LEDs and thus remove from the number of LEDs operated. In this way, a shutdown of these LEDs or a clocked dimming can be achieved.

The present invention is therefore based on the object, an illumination system for a glove box of a vehicle with dimming of a light source such that when you open the flap, a slow increase in brightness of the light source is achieved, the circuit has no separate fixed power supply. Furthermore, the circuit arrangement should be integrated in a switch or else be used as a separate component for subsequent installation in existing systems.

According to the invention the object is achieved in that the illumination system for a glove box of a vehicle with dimming a light source whose switching on and off via a means of a movable part, in particular a flap, operable switch, a network of a plurality of resistors, one or a plurality of capacitors and two transistors, wherein the circuit arrangement is arranged in series with the light source and the switching contact of the switch.

The circuit arrangement is provided on a printed circuit board and is integrated in the switch. Alternatively, the circuit board with the circuitry may be housed in a separate housing and disposed between the light source and the switch contact of the retrofit switch.

Reference to an embodiment of the invention will be described in more detail. The Associated 1 shows the lighting system for a glove box of a vehicle with dimming a light source 2 , Turning the light source on and off 2 via the switch 5 whose switching contact 6 can be actuated via the flap of the glove box.

The arranged inside the glove box light source 2 consists of a series resistor 3 and one or more LEDs 4 that over the series resistor 3 on the one hand with the supply voltage connection 1 are connected. On the other hand, the LEDs are 4 with the switching contact 6 of the switch 5 connected. There is also the possibility of the series resistor 3 in the circuit arrangement 7 to integrate. The light source 2 is spatially separated from the switch 5 arranged in the glove box.

The switching contact 6 of the switch 5 is connected to the input of the circuit 7 and the output of the circuit 7 is with the ground connection 14 connected.

The circuit arrangement 7 for the dimming of the LEDs 4 the light source 2 consists of a network of resistors 10 . 11 . 12 . 13 , the capacitor 14 and the transistors 8th . 9 , The capacitor 14 Delays the voltage increase at the base of the transistor 8th , The resistor network from the resistors 10 . 11 . 12 and 13 limits on the one hand the base current of the transistor 8th and on the other hand the charging current of the capacitor 14 ,

The circuit arrangement 7 for dimming the light source 2 is in series with the light source 2 and the switching contact 6 of the switch 5 connected. Due to the series connection, the circuit arrangement has no separate supply voltage with fixed potential and can therefore be integrated into existing harnesses without providing additional lines.

The circuit arrangement 7 is arranged on a printed circuit board. The circuit board with the circuit arrangement 7 is in common with the switching contact 6 in the housing of the switch 5 , which is provided in the damping system for slowly opening the flap of the glove box, installed.

When the flap of the glove box is opened, the closing contact is closed 6 of the switch 5 and it starts a low current through the LED's 4 to flow, which only leads to a barely visible glow.

By the current flow is the capacitor 14 charged, with the electrical voltage across the capacitor 14 increases. Parallel to the capacitor 14 are the transistors 8th and 9 switched in Darlington circuit, which are gradually switched through.

The more the transistors 8th and 9 afford, the more current flows through the LED's 4 and their brightness increases. The dimming is independent of the opening angle of the flap of the glove box.

The course of the dimming process can be determined by the dimensioning of the capacitor 14 and the resistances 10 . 11 . 12 and 13 in the circuit arrangement 7 be varied, the maximum current is limited to about 100 mA.

LIST OF REFERENCE NUMBERS

1

Supply voltage terminal

2

light source

3

dropping resistor

4

LED

5

switch

6

switching contact

7

circuitry

8th

transistor

9

transistor

10

resistance

11

resistance

12

resistance

13

resistance

14

capacitor

15

earth terminal

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202007011316 U1 [0003]
• DE 19830873 A1 [0005]
• DE 102008006505 A1 [0007]
• DE 102008010320 A1 [0009]

Claims (3)

Illumination system for a glove box of a vehicle with dimming of a light source, whose switching on and off is effected via a switch which can be actuated by means of a movable part, in particular a flap, characterized in that a circuit arrangement ( 7 ) comprising a network of multiple resistors ( 10 . 11 . 12 . 13 ), one or more capacitors ( 14 ) and two transistors ( 8th . 9 ), and the circuit arrangement ( 7 ) in series with the light source ( 2 ) and the switching contact ( 6 ) of the switch ( 5 ) is arranged. Illumination system according to claim 1, characterized in that the circuit arrangement ( 7 ) is arranged on a circuit board and in the switch ( 15 ) is integrated. Illumination system according to claim 1, characterized in that the circuit arrangement ( 7 ) is arranged on a printed circuit board in a separate housing, which in an existing lighting system of a glove box between light source ( 2 ) and the switching contact ( 6 ) of the switch ( 5 ) can be used.

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