CN210225832U - High efficiency LED car headlight of intelligence promotion luminance - Google Patents
High efficiency LED car headlight of intelligence promotion luminance Download PDFInfo
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- CN210225832U CN210225832U CN201921013434.XU CN201921013434U CN210225832U CN 210225832 U CN210225832 U CN 210225832U CN 201921013434 U CN201921013434 U CN 201921013434U CN 210225832 U CN210225832 U CN 210225832U
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Abstract
The utility model discloses a high-efficiency LED automobile headlamp capable of intelligently improving brightness, which comprises a diode D5, a triode Q2, a MOS tube Q1 and a driving chip U1, the cathode of the diode D5 is connected with the anode of the diode D1, the pin 3 of the driving chip U1 and the resistor R2, the anode of the diode D5 is connected with the base of the triode Q2 through the resistor R3, the collector of the triode Q2 is connected with the resistor R1, the resistor R2 and the grid of the MOS tube Q1, the other end of the resistor R1 is connected with the source of the MOS tube Q1, the cathode of the diode D4 and the pin 1 of the driving chip U1, the high-efficiency LED automobile headlamp for intelligently improving the brightness adopts a low saturation voltage drop linear LED drive, a 12V LED lamp bead and an intelligent identification input voltage circuit, the intelligent switching driving of the 3V, 6V, 9V and 12V LED lamp beads under the condition of different input voltages is realized, and the high-efficiency work of the LED automobile headlamp under two states of flameout and starting is realized.
Description
Technical Field
The utility model relates to the field of lighting technology, specifically a high efficiency LED car headlight of intelligence promotion luminance.
Background
When the small-sized automobile is in a flameout state, the whole automobile is supplied with power by the storage battery, the voltage is generally about 12V, after the automobile is ignited and started, the whole automobile is supplied with power by the generator, and the voltage is generally about 13.5 to 14V. At present, LED lamp beads of the automobile headlamp adopt LED lamp beads with 9V voltage, if linear LED driving is adopted, when an automobile is in a flameout state, the efficiency of the LED headlamp is about 75%, and after the automobile is started, the efficiency of the LED headlamp is about 65%. Because the normal use state of the automobile LED headlamp is generally a starting state, the conversion efficiency of the existing linear driving LED automobile headlamp is very low, the heat productivity is large, and the loss is large.
Disclosure of Invention
An object of the utility model is to provide a high efficiency LED car headlight of intelligence promotion luminance to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a high-efficiency LED automobile headlamp capable of intelligently improving brightness comprises a diode D5, a triode Q2, an MOS tube Q1 and a driving chip U1, wherein the cathode of the diode D5 is connected with the anode of a diode D1, the pin 3 and the resistor R2 of the driving chip U1, the anode of a diode D5 is connected with the base of a triode Q2 through a resistor R3, the collector of the triode Q2 is connected with a resistor R1, a resistor R2 and the grid of an MOS tube Q1, the other end of a resistor R1 is connected with the source of an MOS tube Q1, the cathode of the diode D4 and the pin 1 of the driving chip U1, the drain of the MOS tube Q1 is connected with the cathode of a diode D3 and the anode of the diode D4, the cathode of the diode D4 is connected with the anode of the diode D4, and the cathode of the diode D4 is connected with.
As a further technical solution of the present invention: the diode D1, the diode D2, the diode D3 and the diode D4 are all LED lamp beads.
As a further technical solution of the present invention: the transistor Q2 is an NPN transistor.
As a further technical solution of the present invention: the driving chip U1 is a linear constant current LED driving chip.
As a further technical solution of the present invention: the LED lamp beads are 3VLED lamp beads.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses intelligence promotes high efficiency LED car headlight of luminance adopts the linear LED drive of low saturation pressure drop, 12V LED lamp pearl, intelligent recognition input voltage circuit to realize intelligent switching drive 3V, 6V, 9V, 12V LED lamp pearl under the different input voltage condition, realize that LED car headlight is flameout and start high efficiency work under two kinds of states.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Fig. 2 is a circuit diagram of the driver chip U1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1: referring to fig. 1-2, a high-efficiency LED automobile headlamp capable of intelligently increasing brightness includes a diode D5, a triode Q2, a MOS transistor Q1 and a driving chip U1, a cathode of the diode D5 is connected to an anode of the diode D1, a pin 3 of the driving chip U1 and a resistor R2, an anode of a diode D5 is connected to a base of the triode Q2 through a resistor R3, a collector of the triode Q2 is connected to the resistor R1, the resistor R2 and a gate of the MOS transistor Q1, the other end of the resistor R1 is connected to a source of the MOS transistor Q1, a cathode of the diode D4 and a pin 1 of the driving chip U1, a drain of the MOS transistor Q1 is connected to a cathode of the diode D3 and an anode of the diode D4, a cathode of the diode D4 is connected to an anode of the diode D4. The diode D5, the triode Q2, the MOS tube Q1 and other elements form a control circuit for intelligently identifying input voltage and automatically switching driving voltage, when the voltage is higher, the voltage stabilizing diode D5 is conducted, the triode Q2 is conducted, the MOS tube Q1 is cut off, at the moment, the diodes D1-D4 are all connected into the circuit, when the voltage is lower, the Q1 is conducted, the diode D4 is short-circuited, and the purpose of intelligent adjustment is achieved. The control circuit for intelligently identifying the input voltage and automatically switching the driving voltage can be implemented by various circuits, and the circuit shown in fig. 1 is one of the methods. The linear LED driving chip can adopt other similar chips. If the LED lamp bead with 12V voltage is adopted, the efficiency of linearly driving the LED automobile headlamp can be greatly improved, but the linear driving power supply can normally work only by the voltage drop of at least 0.5V, so that the automobile headlamp adopting the LED lamp bead with 12V voltage can not normally work under the automobile flameout state, namely under the condition of 12V input voltage. The utility model discloses just in order to solve linear drive LED car headlight's above shortcoming, adopt intelligent recognition input voltage when flame-out and the starting condition (voltage is 12V when flame-out, and voltage is 13.5V when starting), the lamp pearl of automatic selection drive 9V or 12V to realize improving LED headlight efficiency (the highest 95%), guarantee again that LED headlight can all normally work under various states.
Embodiment 2, on the basis of embodiment 1, as shown in fig. 2, is an internal circuit diagram of a low-protection and low-voltage-drop linear LED driving chip of an xiangwei photoelectric XW8201 (U1), and the above technical solution can be effectively implemented by using the above chip or the like.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The high-efficiency LED automobile headlamp capable of intelligently improving brightness comprises a diode D5, a triode Q2, an MOS tube Q1 and a driving chip U1 and is characterized in that the cathode of the diode D5 is connected with the anode of the diode D1, a pin 3 and a resistor R2 of the driving chip U1, the anode of a diode D5 is connected with the base of a triode Q2 through a resistor R3, the collector of the triode Q2 is connected with a resistor R1, a resistor R2 and the grid of the MOS tube Q1, the other end of a resistor R1 is connected with the source of the MOS tube Q1, the cathode of the diode D4 and a pin 1 of the driving chip U1, the drain of the MOS tube Q1 is connected with the cathode of the diode D3 and the anode of the diode D4, the cathode of the diode D4 is connected with the anode of the diode D4.
2. The high-efficiency LED automobile headlamp capable of intelligently improving brightness according to claim 1, wherein the diode D1, the diode D2, the diode D3 and the diode D4 are all LED lamp beads.
3. The high-efficiency LED automobile headlamp capable of intelligently increasing brightness according to claim 1, wherein the transistor Q2 is an NPN transistor.
4. The high-efficiency LED automobile headlamp capable of intelligently improving brightness according to claim 1, wherein the driving chip U1 is a linear constant-current LED driving chip.
5. The high-efficiency LED automobile headlamp capable of intelligently increasing brightness according to claim 2, wherein the LED lamp bead is a 3VLED lamp bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921013434.XU CN210225832U (en) | 2019-07-02 | 2019-07-02 | High efficiency LED car headlight of intelligence promotion luminance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921013434.XU CN210225832U (en) | 2019-07-02 | 2019-07-02 | High efficiency LED car headlight of intelligence promotion luminance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210225832U true CN210225832U (en) | 2020-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921013434.XU Expired - Fee Related CN210225832U (en) | 2019-07-02 | 2019-07-02 | High efficiency LED car headlight of intelligence promotion luminance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210225832U (en) |
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2019
- 2019-07-02 CN CN201921013434.XU patent/CN210225832U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200331 Termination date: 20210702 |