DUMMY LOAD FOR AUTOMOTIVE LED LIGHT WITH CHARGING AND DISCHARGING FUNCTION

Abstract

A dummy load for automotive LED lights is revealed. The dummy load includes an automotive battery and a control module which is electrically connected both a body computer and a LED light module and provided with a LED control circuit and a charge control circuit. The charge control circuit includes a signal mixer circuit receiving signals from the body computer and discharge signals of the automotive battery, a charger integrated circuit (IC) and a feedback control circuit for battery both electrically connected to the signal mixer circuit, and a battery charging circuit electrically connected to the charger IC and transmitting charge signals to the feedback control circuit for battery and the automotive battery. Thereby a conventional dummy load resistor is replaced by the automotive battery for protecting the automotive LED light from overheating, increasing product stability and recycling a part of electricity for recharge of the automotive battery.

Claims

1. A dummy load for automotive LED lights with charging and discharging function comprising: a control module which is electrically connected to a body computer and a LED light module and is provided with a LED control circuit and a charge control circuit built therein; an automotive battery electrically connected to the charge control circuit; wherein the charge control circuit includes a signal mixer circuit, a charger integrated circuit, a feedback control circuit for battery, and a battery charging circuit; wherein the signal mixer circuit which receives signals from the body computer and discharge signals of the automotive battery at the same time is electrically connected to both the charger integrated circuit and the feedback control circuit for battery while the feedback control circuit for battery receives charge signals of the automotive battery; the charger integrated circuit is electrically connected to the battery charging circuit for allowing the battery charging circuit to transmit charge signals to the feedback control circuit for battery and the automotive battery.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

[0011] FIG. 1 is a block diagram of a circuit for an embodiment according to the present invention;

[0012] FIG. 2 is a circuit diagram of a charge control circuit of an embodiment according to the present invention;

[0013] FIG. 3 is a block diagram showing a circuit for a dummy load resistor available now.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0014] In order to learn technical content and functions of the present invention more completely and clearly, please refer to the following embodiments with detailed descriptions with reference to the related figures and numbers therein.

[0015] Refer to FIG. 1 and FIG. 2, a dummy load for automotive LED lights with charging and discharging function according to the present invention mainly includes a control module 2 which is electrically connected to a body computer 1 and a LED light module 4 and is built with a LED control circuit (not shown in figure) and a charge control circuit 21 therein, and an automotive battery 3 electrically connected to the charge control circuit 21.

[0016] As shown in FIG. 2, the charge control circuit 21 consists of a signal mixer circuit 211, a charger integrated circuit (IC) 212, a feedback control circuit for battery 213, and a battery charging circuit 214. The signal mixer circuit 211 which receives signals from the body computer 1 and discharge signals of the automotive battery 3 at the same time is electrically connected to both the charger IC 212 and the feedback control circuit for battery 213 while the feedback control circuit for battery 213 receives charge signals of the automotive battery 3. As to the charger IC 212, it is electrically connected to the battery charging circuit 214 for allowing the battery charging circuit 214 to transmit charge signals to the feedback control circuit for battery 213 and the automotive battery 3.

[0017] While in use, the control module 2 is actuated by the body computer 1 so that the LED control circuit of the control module 2 outputs a constant current to the LED light module 4 for allowing the LED light module 4 to light up. At the same time, the control module 2 receives control signals from the body computer 1 and retrieves small signals thereof. After being analyzed by the signal mixer circuit 211 of the charge control circuit 21, the small signals of the control signals are output to the battery charging circuit 214 and this is source-level processing of the control signals. By characteristics of the automotive battery 3, the battery charging circuit 214 outputs charge feedback signals to the feedback control circuit for battery 213 for providing optimum charging. The control signal and the charge feedback signal from the output end are compared and amplified by the battery charging circuit 214 so that charging current the battery charging circuit 214 applies is controlled by the amplified signal. A power source for the control module 2 is the automotive battery 3 and a part of electricity is sent to the automotive battery 3 to recharge the automotive battery 3 since the respective components are not ideal. Thus the automotive battery 3 is protected from over-charge or over-discharge.

[0018] In summary, compared with the techniques available now, the present invention mainly uses the automobile battery with charge/discharge characteristics to replace the conventional dummy load resistor for protecting the whole LED light from overheating and increasing product stability. A part of electricity is also recycled for energy recharge of the automotive battery. Moreover, overall luminous efficacy is improved by the LED light. Therefore the present device which has the advantages of energy-saving, carbon reduction and improved power usage is more convenient to use.

[0019] Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, and representative devices shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalent.