CN205105310U - Car camera protection circuit of backing a car - Google Patents
Car camera protection circuit of backing a car Download PDFInfo
- Publication number
- CN205105310U CN205105310U CN201520725389.6U CN201520725389U CN205105310U CN 205105310 U CN205105310 U CN 205105310U CN 201520725389 U CN201520725389 U CN 201520725389U CN 205105310 U CN205105310 U CN 205105310U
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- resistance
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- electric capacity
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- car
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Abstract
The utility model discloses a car camera protection circuit of backing a car, manage Q1, electric capacity C3 and resistance R1 including chip U1, MOS. The utility model discloses an extension is for the mode of camera power supply, the parking with drive between change, the shelves pole has the A certain amount of time delay when backing a car, the camera can not switched on immediately, has protected the camera, has improved the life of camera.
Description
Technical field
The utility model relates to a kind of protective circuit, specifically a kind of rearview camera of automobile protective circuit.
Background technology
Automaker can be that reversing observation camera is powered with reversing lamp circuit usually; in automatic gearshift automobile; when forwarding driving states (or contrary) to from parking; gear switch will through reverse gear; now camera can add an of short duration power pulse; the potential pulse of this burst is unfavorable for the sensitive circuit elements in camera, can shorten its life-span.
Utility model content
The purpose of this utility model is to provide a kind of rearview camera of automobile protective circuit improving the camera life-span, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of rearview camera of automobile protective circuit, comprise chip U1, metal-oxide-semiconductor Q1, electric capacity C3 and resistance R1, described electric capacity C3 one end connects reversing lamp positive pole A respectively and holds, diode D1 negative pole, resistance R1, resistance R3, chip U1 pin 8, resistance R5 and camera RL, the electric capacity C3 other end connects reversing lamp negative pole B respectively and holds, electric capacity C1, resistance R4, the S pole of electric capacity C2 and metal-oxide-semiconductor Q1, the electric capacity C1 other end connects diode D1 positive pole respectively, the resistance R1 other end and chip U1 pin 3, the described resistance R4 other end is the contact resistance R3 other end and chip U1 pin 2 respectively, chip U1 pin 1 is the contact resistance R5 other end respectively, the electric capacity C2 other end and resistance R2, the resistance R2 other end connects the G pole of metal-oxide-semiconductor Q1, the D pole of metal-oxide-semiconductor Q1 connects the camera RL other end.
As the utility model further scheme: described chip U1 model is LM393.
Compared with prior art; the beneficial effects of the utility model are: the utility model is by extending the mode of powering to camera; change between parking and driving; when lever is by reversing position; the regular hour is had to postpone; camera can not be energized immediately, protects camera, improves the useful life of camera.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of rearview camera of automobile protective circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of rearview camera of automobile protective circuit, comprise chip U1, metal-oxide-semiconductor Q1, electric capacity C3 and resistance R1, electric capacity C3 one end connects reversing lamp positive pole A respectively and holds, diode D1 negative pole, resistance R1, resistance R3, chip U1 pin 8, resistance R5 and camera RL, the electric capacity C3 other end connects reversing lamp negative pole B respectively and holds, electric capacity C1, resistance R4, the S pole of electric capacity C2 and metal-oxide-semiconductor Q1, the electric capacity C1 other end connects diode D1 positive pole respectively, the resistance R1 other end and chip U1 pin 3, the resistance R4 other end is the contact resistance R3 other end and chip U1 pin 2 respectively, chip U1 pin 1 is the contact resistance R5 other end respectively, the electric capacity C2 other end and resistance R2, the resistance R2 other end connects the G pole of metal-oxide-semiconductor Q1, the D pole of metal-oxide-semiconductor Q1 connects the camera RL other end.
Chip U1 model is LM393.
Operation principle of the present utility model is: the input of this circuit is connected to positive pole and the negative terminal of reversing lamp, circuit is that camera is powered by metal-oxide-semiconductor Q1, resistance R1 and electric capacity C1 forms a time delay element, when reversing lamp is bright, it is that electric capacity slowly charges by resistance R1, resistance R3 and resistance R4 forms a voltage divider, for the end of oppisite phase of chip U1 is set to 6V, power supply is added in the moment on circuit, chip U1 exports as low, metal-oxide-semiconductor Q1 turns off, when the voltage rise of electric capacity C1 is more than 6V, chip U1 exports as high, metal-oxide-semiconductor Q1 conducting, delay time can be changed by the value of resistance R1 and electric capacity C1, when lever is switched to other position any from reversing position, electric capacity C1 is by diode D1, resistance R3 and resistance R4 discharges in 60ms, when changing between parking and driving, when lever is by reversing position, due to free delay, camera can not be energized, thus protect camera.
Claims (2)
1. a rearview camera of automobile protective circuit, comprise chip U1, metal-oxide-semiconductor Q1, electric capacity C3 and resistance R1, it is characterized in that, described electric capacity C3 one end connects reversing lamp positive pole A respectively and holds, diode D1 negative pole, resistance R1, resistance R3, chip U1 pin 8, resistance R5 and camera RL, the electric capacity C3 other end connects reversing lamp negative pole B respectively and holds, electric capacity C1, resistance R4, the S pole of electric capacity C2 and metal-oxide-semiconductor Q1, the electric capacity C1 other end connects diode D1 positive pole respectively, the resistance R1 other end and chip U1 pin 3, the described resistance R4 other end is the contact resistance R3 other end and chip U1 pin 2 respectively, chip U1 pin 1 is the contact resistance R5 other end respectively, the electric capacity C2 other end and resistance R2, the resistance R2 other end connects the G pole of metal-oxide-semiconductor Q1, the D pole of metal-oxide-semiconductor Q1 connects the camera RL other end.
2. rearview camera of automobile protective circuit according to claim 1, is characterized in that, described chip U1 model is LM393.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520725389.6U CN205105310U (en) | 2015-09-18 | 2015-09-18 | Car camera protection circuit of backing a car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520725389.6U CN205105310U (en) | 2015-09-18 | 2015-09-18 | Car camera protection circuit of backing a car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205105310U true CN205105310U (en) | 2016-03-23 |
Family
ID=55521058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520725389.6U Expired - Fee Related CN205105310U (en) | 2015-09-18 | 2015-09-18 | Car camera protection circuit of backing a car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205105310U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672840A (en) * | 2018-12-17 | 2019-04-23 | 蜂巢(武汉)微系统技术有限公司 | A kind of reverse image aspect ratio modification method and system |
-
2015
- 2015-09-18 CN CN201520725389.6U patent/CN205105310U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672840A (en) * | 2018-12-17 | 2019-04-23 | 蜂巢(武汉)微系统技术有限公司 | A kind of reverse image aspect ratio modification method and system |
| CN109672840B (en) * | 2018-12-17 | 2020-12-08 | 蜂巢(武汉)微系统技术有限公司 | Method and system for correcting aspect ratio of reverse image |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160323 Termination date: 20160918 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |