DE10313246A1 - Automotive lamp module - Google Patents

Abstract

A motor vehicle light module has individual LEDs (1) as the illuminant, a base body for holding the LEDs (1), sensors for detecting external influences and / or internal influences and / or properties related to production technology, and electronics for controlling and regulating the brightness of the LEDs (1 ) depending on the detected external and / or internal influences and properties of the LEDs and a data memory (6) of the recorded data.

Description

The The invention relates to a motor vehicle lamp with individual LEDs.

Such a motor vehicle lamp is, for example, by the DE 199 43 256 A1 known.

The The invention has for its object the function of a motor vehicle lamp to improve.

This Task is performed by a motor vehicle lighting module with individual LEDs as illuminants, a basic body for holding the LEDs, Sensors for detecting external influences and / or internal influences and / or production-related properties of the LEDs and with electronics to control and regulate the brightness of the LEDs depending from the detected outer and / or internal influences and LED properties as well as with a data storage of the captured Data solved. The motor vehicle lamp according to the invention can be for anyone Purposes, d. H. For Turn signals, headlights or the like can be used. It can a double function of LED groups can also be provided by the LEDs depending on the control for the parking light or the brake light or similar to care.

• 1. externe Einflüsse wie Umgebungstemperatur und Änderungen der Betriebsspannung, usw.;
• 2. interne Einflüsse wie Eigenerwärmung der LEDs, usw.;
• 3. fertigungstechnisch bedingte Eigenschaften, Gegebenheiten oder Voraussetzungen wie chargenbedingte Unterschiede bezüglich stromabhängiger Helligkeit, Temperaturabhängigkeit, Durchlassspannungen, und Kennlinien usw.

With the help of a μC circuit, a regulated individual pulse-width modulated current flow to each individual LED or to several LEDs is generated together, which can compensate for the following influences:

• 1. external influences such as ambient temperature and changes in operating voltage, etc .;
• 2. internal influences such as self-heating of the LEDs, etc .;
• 3. Manufacturing-related properties, conditions or requirements such as batch-related differences with regard to current-dependent brightness, temperature dependency, forward voltages and characteristic curves etc.

With Using the μC circuit calibration of different LEDs is thus also possible to ensure a uniform lighting behavior. A selection or Grouping of LEDs can be omitted. The LEDs are better protected by the outer and internal influences continuously monitored and appropriate compensation to protect against failure to be hit.

The LEDs themselves are monitored for a failure. The electronics include a μC-based, regarding country code and brightness codable circuit with regulated PWM current sources (for example a circuit board approx. 2cm × 8cm / one-sided), one Software control loop via temperature, Voltage and current measurement, SAE / ECE coding using a circuit breaker or connector coding with 3rd connector pin and intelligent PWM control for one LED life optimization and failure management with minimal power dissipation.

The Electronics can be housed on a circuit board, which on the base body thermally conductive fixed or housed in a separate housing or using MID technology is trained. The complete electronics can be in the motor vehicle light module to get integrated. By integrating the control into the motor vehicle lamp module there is a reduced wiring and assembly.

The Electronics of a motor vehicle lamp module can be via a Bus system can be connected to a central control unit. from that there are further variants of the invention (diagnosis, networking, Flasher, etc.).

On preferred embodiment the invention is shown in the drawing. With reference to the Figures of the drawing is the embodiment below explained. It shows:

1 a block diagram of the LED control;

2 a plan view of a carrier in MID technology (Molded Interconnection Device);

3 the carrier after 2 in a sectional view along the line III-III 2 ,

The Electronics for LED control is an essential feature of the invention intelligently trained and integrated into the vehicle lamp module. By the interaction of the electronics with sensors for detection several parameters, such as the temperature in the area of the LEDs (temperature monitoring), the brightness of an LED, the contamination of the lamp cover and environmental factors (rain, fog or darkness) can be a regulation and control of the brightness of each individual LED. from that follows with the help of the control loop an adaptable, self-regulating, adaptable System of an intelligent lamp for a motor vehicle, the one automatic Control of the brightness of the illuminant depending on the detected parameters performs. It can automatically switch on permanent lighting or a turn signal can be reached.

The control, regulation and error monitoring of LEDs 1 using a μC circuit 2 is in the 1 shown. The LED current 3 is regulated and recorded. The LEDs 1 are digitally controlled with pulse width modulation and supplied with current I ₁ , I ₂ to I _n . The μC circuit 2 is with a power supply 4 via the electrical system 5 of the vehicle and a data storage 6 for characteristic curves of the LEDs 1 connected. operating voltage 7 , Country code 8th , Electronics temperature 9 , LED temperature 10 and other sensors 11 for the outside temperature or other external influences are from the μC circuit 2 detected and evaluated so that a current flow I _n as a function of the operating voltage measurement 7 , the country code 8th , the electronics temperature 9 and the LED temperature 10 and other influences 11 to the LEDs 1 is delivered. There is data communication between the μC circuit 2 and the vehicle's on-board data network 13 using an interface 12 instead of.

From the 2 and 3 it can be seen how the electronic circuit according to the invention in a carrier 17 can be integrated in MID technology, for example, in order to optimally adapt electronics, carriers, cooling, lamps and connection technology to the space requirements of a motor vehicle. A group of LEDs 1 is on the carrier 17 and can be controlled by the electronic control depending on the function. Analog to the LEDs can be on the carrier 17 the μC controller and power components must also be installed. The individual conductor tracks and other electronic components are in the 2 and 3 Not shown. The geometry of the beam 17 is exemplary and can take almost any shape. Slots (or similarly executed thermal flow paths) 14 conduct heat when using MID technology via surface transport downwards in the direction of the cooling fins 15 , Additional electrical or electronic connections are made using the integrated connector 16 realized.

1

LED

2

.mu.C circuit

3

LED current

4

power supply

5

board network

6

data storage

7

Operating voltage measurement

8th

country code

9

electronics temperature

10

LED temperature

11

temperature sensor

12

interface

13

Bordnetzdatenbus

14

thermal flow path (e.g. slot)

15

cooling fin

16

plug

17

carrier

Claims (5)

Motor vehicle light module with - individual LEDs ( 1 ) as illuminant; - a base body ( 17 ) for holding the LEDs ( 1 ); - sensors ( 7 to 11 ) to record external and / or internal influences during the operation of the LEDs ( 1 ) and / or production-related properties of the LEDs ( 1 ) - a data storage ( 6 ) of the collected data ( 6 ); - electronics to control and regulate the LEDs ( 1 ) depending on the recorded influences and / or properties. Motor vehicle light module according to claim 1, characterized characterized that the electronics housed on a circuit board is which on the base body is fixed. Motor vehicle light module according to claim 1 or 2, characterized in that the electronics of a motor vehicle lamp module via a Bus system is connected to a central control unit. Motor vehicle light module according to one of the preceding claims, characterized in that the LEDs ( 1 ) and the circuit board are thermally conductively connected to the base body as a heat sink. Motor vehicle light module according to one of the preceding Expectations, characterized in that parts of the motor vehicle lamp module are manufactured using MID technology.