CN201134956Y - LED car lamp circuit device - Google Patents

Abstract

The utility model relates to a LED car light circuit device contains input device, emitting diode device and current-limiting unit. The light emitting diode device comprises at least one light emitting device. Each light-emitting device comprises at least one light-emitting diode and a protection device. The protection device is connected in parallel with each light-emitting diode. The LED vehicle lamp circuit device can achieve the effects of protecting the light emitting diode, increasing the safety and being easy to maintain and detect.

Description

LED car light circuit device

technical field

The utility model relates to a car light circuit device, in particular to a light emitting diode (Light Emitting Diode, LED) car light circuit device.

Background technique

Due to the breakthrough of semiconductor technology, the light emitting diode (Light Emitting Diode, LED) can come out, gradually replace the traditional light source, and become the source of lighting in daily life. Light-emitting diodes have the advantages of low power consumption, long life, small size, and fast response, and have become a new generation of light source technology that has attracted much attention.

With the evolution of automotive technology, automotive lighting is no longer the traditional technology based on optics, materials, and molding processes. Under the trend of safety, environmental protection, and intelligence, LED lighting systems with many advantages have emerged as the times require. Therefore, at present, LEDs have been widely used in vehicles, such as brake lights, direction lights, instrument indicators and interior lights, etc., replacing traditional halogen lamps and incandescent lamps.

However, the existing car light circuit device is designed by directly connecting LED components in series and then parallel connection, without adding a protection device, so when one of the LED components in the series circuit is damaged, it will cause all LEDs on the same series circuit to be out of light, so not only Affect driving safety, and it is not easy to maintain and detect. However, LED components are easily damaged by static electricity, and such a situation cannot be avoided in the existing car light circuit device. Therefore, an LED car light circuit device is needed to improve the above shortcomings.

Contents of the invention

The purpose of this utility model is to overcome the defects existing in the existing car light circuit device, and provide a LED car light circuit device with a new structure. The technical problem to be solved is that when a single light emitting diode is damaged, the circuit still It can be circulated so that other light-emitting diodes can still continue to work, and the damaged light-emitting diodes in the circuit can be easily and clearly determined, and then directly replaced and repaired, which is very suitable for practical use.

The purpose of this utility model and the solution to its technical problems are achieved by adopting the following technical solutions. According to the utility model, an LED lamp circuit device includes: an input device; a light-emitting diode device connected to the input device and including at least one light-emitting device, and each light-emitting device includes at least one light-emitting diode; and A protection device, the protection device is connected in parallel to each of the light emitting diodes; and a current limiting unit is connected to the light emitting diode device.

The purpose of this utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned LED car light circuit device, the input device includes a first signal input terminal and a reverse power supply protection device, and the reverse power supply protection device is connected between the first signal input terminal and the light emitting diode device.

In the aforementioned LED lamp circuit device, wherein the reverse power supply protection device includes two first reverse power supply protection elements, and the first reverse power supply protection elements are connected in parallel.

In the aforementioned LED car light circuit device, the first reverse power supply protection element is a diode.

In the aforementioned LED lamp circuit device, the input device includes a second signal input terminal and a current limiting device, and the current limiting device is connected between the second signal input terminal and the light emitting diode device.

The aforementioned LED lamp circuit device, wherein the current limiting device includes a second reverse power supply protection element and two current limiting elements, the above current limiting elements are connected in parallel, the second reverse power supply protection element and the above current limiting element connected in series.

In the aforementioned LED lamp circuit device, the second reverse power supply protection element is a diode, and the current limiting element is a resistor.

In the aforementioned LED car light circuit device, each of the light-emitting devices includes a light-emitting diode, and the protection device includes two electrostatic protection diode crystals. The electrostatic protection diode crystals are connected in series back to back and connected in parallel with the light-emitting diode.

In the above-mentioned LED car light circuit device, the above-mentioned electrostatic protection diode crystal grains of the protection device are Zener diodes.

In the foregoing LED lamp circuit device, each of the electrostatic protection diode crystal grains of the protection device is a transient suppression diode.

In the foregoing LED car light circuit device, the light emitting devices are connected in a mixed manner of series and parallel.

In the aforementioned LED car light circuit device, the light emitting devices are connected in series.

In the aforementioned LED car light circuit device, the light emitting devices are connected in parallel.

In the aforementioned LED car light circuit device, the current limiting unit includes a current limiter, and the current limiter is a resistor.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. According to a preferred embodiment of the present invention, the LED lamp circuit device includes an input device, a light emitting diode device and a current limiting unit. Wherein the light emitting diode device includes at least one light emitting device. Each light emitting device includes at least one light emitting diode and a protection device. The protection device is connected in parallel with each of the light emitting diodes.

The input device respectively receives different input signals to achieve reverse voltage protection and distinguish input signals, so that the light emitting device of the LED device produces different brightness according to different input signals. The protection device in the light emitting device is composed of static electricity protection diode grains connected in series, so as to improve the antistatic ability of the light emitting diode. The current limiting unit is connected with the light-emitting diode device to prevent the light-emitting diode from being burned due to excessive total current of the car lamp circuit device, and the reference signal terminal is used to provide a reference potential for an input signal.

When any one of the light-emitting diodes is damaged, the LED car light circuit device can avoid causing the brightness of the overall car light to attenuate too much instantaneously, thereby affecting driving safety. Furthermore, when any one or more of the light emitting diodes in the vehicle light circuit device is damaged, the damaged light emitting diode can be clearly determined, and then replaced and repaired directly, making maintenance and inspection easier.

With the above technical solution, the utility model LED lamp circuit device has at least the following advantages and beneficial effects:

1. Since each LED is connected in parallel with a protection device, when a single LED is damaged, the circuit can still flow, so that other LEDs can still continue to work, and will not cause the overall brightness of the car light to attenuate too much instantaneously, which will affect driving Safety.

2. The protection device of the circuit device uses static protection diode crystals, so the antistatic ability of the light emitting diode can be improved, and the overall circuit can be protected at the same time.

3. When one or more light-emitting diodes are damaged, the circuit device can easily and clearly determine the damaged light-emitting diodes in the circuit, and then directly replace and repair them.

To sum up, the utility model is an LED lamp circuit device, which includes an input device, a light emitting diode device and a current limiting unit. The light emitting diode device includes at least one light emitting device. Each light emitting device includes at least one light emitting diode and a protection device. The protection device is connected in parallel with each of the light emitting diodes. The LED car light circuit device can achieve protection of light emitting diodes, increase safety and facilitate maintenance and detection. The utility model has the above-mentioned many advantages and practical value, it has great improvement no matter in device structure or function, has remarkable progress in technology, and has produced easy-to-use and practical effect, and compared with the existing car lamp The circuit device has enhanced outstanding functions, so it is more suitable for practical use and has wide application value in industry. It is a novel, progressive and practical new design.

The above description is only an overview of the technical solutions of the present utility model. In order to better understand the technical means of the present utility model, it can be implemented according to the contents of the description, and in order to make the above-mentioned and other purposes, features and advantages of the present utility model better It is obvious and easy to understand. The preferred embodiments are specifically cited below, together with the accompanying drawings, and detailed descriptions are as follows.

Description of drawings

In order to make the above and other purposes, features, advantages and embodiments of the present invention more obvious and understandable, the detailed description of the accompanying drawings is as follows:

FIG. 1 shows a block diagram of an LED car light circuit device according to a preferred embodiment of the present invention.

FIG. 2 is a circuit diagram of the LED lamp circuit device of the preferred embodiment in FIG. 1 .

FIG. 3 is a circuit diagram of a light emitting device of the LED lamp circuit device of the preferred embodiment in FIG. 2 .

100: LED lamp circuit device 110: Input device

111: first signal input terminal 112: second signal input terminal

113: Reverse power protection device 114: Current limiting device

115: Second reverse power supply protection element 116: Current limiting element

120: Light-emitting diode device 121: Light-emitting diode

122: Protection device 123: Lighting device

130: Current limiting unit 131: Current limiter

132: Reference signal terminal

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the intended purpose of the invention, the specific implementation, structure and characteristics of the LED lamp circuit device proposed according to the utility model will be described below in conjunction with the accompanying drawings and preferred embodiments. And its effect, detailed description is as follows.

Please refer to FIG. 1 and FIG. 2 , which illustrate an LED lamp circuit device 100 according to a preferred embodiment of the present invention. The LED lamp circuit device 100 includes an input device 110 , a light emitting diode device 120 and a current limiting unit 130 .

In this embodiment, the description is made by applying the LED lamp circuit device 100 to a tail lamp of an automobile. But it is not intended to limit the scope of application of the present utility model. Because the car taillights generally receive lighting signals (normal status) and braking signals (higher brightness requirements). Therefore, in this embodiment, the input device 110 includes a first signal input terminal 111 , a second signal input terminal 112 , a reverse power protection device 113 and a current limiting device 114 .

The first signal input terminal 111 and the second signal input terminal 112 respectively receive a braking signal and a lighting signal. The first signal input terminal 111 receives the brake signal and is connected to the reverse power protection device 113 . In this embodiment, the reverse power supply protection device 113 includes two first reverse power supply protection elements, and the first reverse power supply protection elements may be diodes connected in parallel. The second signal input terminal 112 receives the lighting signal and is connected to the current limiting device 114 . Since the required brightness of the LED device 120 in this state is lower than that in the braking state, in this embodiment, the current limiting device 114 includes a second reverse power protection element 115 and two current limiting elements 116 . The second reverse power protection element 115 can be a diode. The current limiting element 116 may be a resistor. The current limiting elements 116 are connected in parallel. The second reverse power protection element 115 is connected in series with the current limiting element 116 .

The signal input terminal 111 is connected to an anode terminal of a diode of the reverse power supply protection device 113 . The signal input terminal 112 is connected to the anode terminal of the second reverse power supply protection element 115 . The reverse power protection device 113 is used to protect the LED device 120 from being damaged by reverse voltage. The current limiting device 114 is used to reduce the current flowing into the LED device 120 , so that the brightness of the LED device 120 decreases due to the reduced current flowing through it.

The LED device 120 includes one or more light emitting devices 123 . Each light emitting device 123 includes one or more light emitting diodes 121 and a protection device 122 .

Please further refer to FIG. 3, the protection device 122 is connected in parallel with the light emitting diode 121, and can be composed of two ESD protection diode grains connected in series back to back, wherein the ESD protection diode grains are Zener diodes (Zener diode) or instantaneous Variable suppression diode (Transient VoltageSuppressor, TVS). Each light emitting diode 121 of each light emitting device 123 is connected in parallel with the protection device 122 . Different light emitting devices 123 can be connected in series, in parallel or in a mixed manner of series and parallel, and combined to form the light emitting diode device 120 of the circuit device, and the light emitting diode device 120 is connected to the input device 110 .

The current limiting unit 130 includes a current limiter 131 and a reference signal terminal 132 . The current limiting unit 130 is used to limit the total current of the lamp circuit device, so as to prevent the light emitting diode 121 from being burned due to excessive total current. In this embodiment, the current limiter 131 is a resistor, one end of the current limiter 131 is connected to the LED device 120 , and the other end is connected to the reference signal terminal 132 . The reference signal terminal 132 is connected to a ground potential and serves as a reference potential for the signal input terminal 111 and the signal input terminal 112 .

The above are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any Those skilled in the art can use the technical content disclosed above to make some changes or modify them into equivalent embodiments without departing from the technical solution of the present utility model. Content, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (14)

1. LED car light circuit arrangement is characterized in that it comprises:

One input unit;

One light-emitting diode assembly is connected in this input unit, and comprises at least one light-emitting device, and above-mentioned each light-emitting device comprises

At least one light-emitting diode; And

One protective device, this protective device are parallel to above-mentioned each light-emitting diode; And

One current limliting unit is connected in this light-emitting diode assembly.

2. LED car light circuit arrangement according to claim 1; it is characterized in that wherein this input unit comprises first signal input part and a contrary apparatus for protecting power supply, this contrary apparatus for protecting power supply is connected between this first signal input part and this light-emitting diode assembly.

3. LED car light circuit arrangement according to claim 2 is characterized in that wherein should comprising two first contrary power protection elements by contrary apparatus for protecting power supply, and the above-mentioned first contrary power protection element is to connect with parallel way.

4. LED car light circuit arrangement according to claim 3 is characterized in that the wherein above-mentioned first contrary power protection element is a diode.

5. LED car light circuit arrangement according to claim 1 and 2 is characterized in that wherein this input unit comprises a secondary signal input and a current-limiting apparatus, and this current-limiting apparatus is connected between this secondary signal input and this light-emitting diode assembly.

6. LED car light circuit arrangement according to claim 5; it is characterized in that wherein this current-limiting apparatus comprises one second contrary power protection element and two current limiting elements; above-mentioned current limiting element connects with parallel way, and this second contrary power protection element is connected with series system with above-mentioned current limiting element.

7. LED car light circuit arrangement according to claim 6 is characterized in that wherein this second contrary power protection element is a diode, and above-mentioned current limiting element is a resistor.

8. LED car light circuit arrangement according to claim 7; it is characterized in that wherein above-mentioned each light-emitting device comprises a light-emitting diode; this protective device comprises two electrostatic defending diode crystal particles; above-mentioned electrostatic defending diode crystal particle is to be connected in series with back-to-back, and in parallel with this light-emitting diode.

9. LED car light circuit arrangement according to claim 8 is characterized in that wherein above-mentioned each electrostatic defending diode crystal particle of protective device is a Zener diode.

10. LED car light circuit arrangement according to claim 8 is characterized in that wherein above-mentioned each electrostatic defending diode crystal particle of protective device is that transition suppresses diode.

11. LED car light circuit arrangement according to claim 1 is characterized in that between wherein above-mentioned each light-emitting device it being to be connected with hybrid mode in parallel with series connection.

12. LED car light circuit arrangement according to claim 1 is characterized in that between wherein above-mentioned each light-emitting device it being to connect with series system.

13. LED car light circuit arrangement according to claim 1 is characterized in that between wherein above-mentioned each light-emitting device it being to connect with parallel way.

14. LED car light circuit arrangement according to claim 7 is characterized in that wherein this current limliting unit comprises a flow restricter, this flow restricter is a resistor.

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