Unlock instant, AI-driven research and patent intelligence for your innovation.

Illuminating device for vehicles

A technology for lighting devices and vehicles, which can be used in lighting devices, signal devices, vehicle parts, etc., and can solve problems such as high cost

Active Publication Date: 2018-02-06
ZKW GRP GMBH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem that arises here is the start of the on-phase or the end of the off-phase, since at this time the LED and the light emitted thereby are dimmed in very small steps (Schritt) close to zero
In this case it is mandatory that the current supply carries out an analog regulation of the current for each individual LED, which however means that: for each LED or each LED branch a separate current supply is required, which may associated with high cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Illuminating device for vehicles
  • Illuminating device for vehicles
  • Illuminating device for vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] exist figure 1 A regulated current supply 1 is shown in , which in the present case is designed as a step-up converter in which the inductance L, the switching transistor T S , diode D and capacitor C. The boost converter or current supply device 1 at the input voltage U E on, for example, the input voltage of a car battery pack and in the present case provides a constant output current I G , where a voltage U is applied at the output of the current supply A . Using the output current I G to supply an LED branch Z with one or more LEDs D L1 …D Ln and additionally switches on the electronic switch T in its branch S , generally a switching transistor.

[0019] In order to tap the sub-current I N , the regulated shunt current circuit N is in parallel with the LED branch Z, said regulated shunt current circuit is here controlled by the transistor T N and a resistor R in series with the transistor, where the transistor T N Controlled by op amp 2. The operational ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An illuminating device for vehicles which has at least one LED branch (Z1, Z2) with at least one LED (DL11...DL1n, DL21...DL2n), and with a controlled LED power supply (1) and an actuator (3) which provides dimming signals (sDA1, sDA2; sDD1, sDD2) for the LEDs, wherein an electronic switch (TS1, TS2) is assigned to the at least one LED branch (Z1, Z2) and is supplied with a PWM dimming signal (sDD1, sDD2), and the at least one LED branch is bridged for the purpose of branching off a partial current (IN1, IN2) from a controlled auxiliary circuit (N1, N2) having a current controller with an analogue controller (21, TN1, 22, TN2) which is supplied with an analogue dimming signal (sDA1, sDA2).

Description

technical field [0001] The invention relates to a lighting device for a vehicle, which has at least one LED branch with at least one LED, and which has a regulated LED current supply and an actuation device which is an LED. Provides a dimming signal. Background technique [0002] By using LEDs as light sources for vehicle headlights and other lighting devices on vehicles, such as blinkers, new possibilities have become available for designers when designing individual light functions. In addition to the actual function, more and more attention is always paid to the design. An important detail is the optical transition between switching two or more light functions. A "hard" switching on or off of the light function is as undesirable as possible. Instead, the switching-on and switching-off processes are carried out continuously via ramps. The problem that arises here is the start of the switch-on phase or the end of the switch-off phase, since at this time the LED and the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H05B33/08H05B44/00
CPCB60Q1/04H05B45/395H05B45/44H05B45/10H05B45/59H05B45/48Y02B20/30F21Y2115/10F21S41/141
Inventor E.维伯G.弗里茨
Owner ZKW GRP GMBH