CN214067528U - LCD backlight source state detection system - Google Patents
LCD backlight source state detection system Download PDFInfo
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- CN214067528U CN214067528U CN202023276261.6U CN202023276261U CN214067528U CN 214067528 U CN214067528 U CN 214067528U CN 202023276261 U CN202023276261 U CN 202023276261U CN 214067528 U CN214067528 U CN 214067528U
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- backlight source
- current
- backlight
- voltage
- detection system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a LCD backlight source state detection system, including the detection controller that has current-voltage detection module, anodal tandem connection in the backlight source with between the current-voltage detection module backlight source drive power supply in the current-voltage detection circuit, be used for presetting the photosensitive sensor in backlight source installation casing, photosensitive sensor connect in detect on the controller, can detect backlight source drive circuit current and voltage in real time to can conjecture the basic operating condition of backlight source; meanwhile, the working state of the backlight source can be fed back in real time through the photosensitive sensor, and whether the backlight source is started or not can be effectively monitored, so that the backlight driving circuit is effectively monitored, the system is simple and reliable, and the stability of the system is improved.
Description
Technical Field
The utility model relates to a LCD backlight state detecting system.
Background
With the maturity of LCD technology, LCD highlighting is becoming more and more widely used as an important display medium, and the cost is also decreasing greatly. At present, the LCD backlight generally adopts an LED light source as a main source, and the LED light source is driven by various modes such as boosting, reducing, integrating a chip, and the like, so as to ensure that the LED light string always works in a constant current state, thereby maintaining the brightness consistency of the LED light.
As a backlight, an LED has many advantages such as high brightness, high color purity, long life, high adaptability, low cost, and easy industrialization, and is therefore widely used as a mainstream in the market. Because the LED backlight adopts a driving design combining series connection and parallel connection in the aspect of driving design, how to improve the reliability of the circuit has become a hot issue of current research.
In the LED backlight driving circuit, when individual LED lamp beads are damaged, the lamp beads in adjacent series circuits are broken, so that the whole display effect is influenced. This is not sufficient for use scenarios in the commercial or aeronautical field.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a LCD backlight state detecting system.
In order to solve the technical problem, the utility model discloses a technical scheme is: a LCD backlight source state detection system comprises a detection controller with a current and voltage detection module, a backlight source driving power supply and a photosensitive sensor, wherein the anode of the backlight source driving power supply is connected in series in a current and voltage detection circuit between a backlight source and the current and voltage detection module, the photosensitive sensor is used for being preset in a backlight source installation shell, and the photosensitive sensor is connected to the detection controller.
In some embodiments, the detection controller is provided with a communication serial port for connecting with an upper computer.
In some embodiments, the system further comprises a host computer communicatively coupled to the output of the detection controller.
In some embodiments, the system further comprises a digital display connected with the upper computer and used for displaying the backlight source current voltage in real time.
In some embodiments, the system further comprises an early warning device connected with the upper computer and used for reflecting the abnormal state of the current and the voltage of the backlight source.
In some embodiments, the system further comprises a state display device connected with the upper computer, and the upper computer receives the working state signal of the photoresistor and converts the working state signal into an on and off state to control the state display device.
The scope of the present invention is not limited to the technical solutions formed by specific combinations of the above technical features, and other technical solutions formed by arbitrary combinations of the above technical features or equivalent features should be covered. For example, the above features and the technical features (but not limited to) having similar functions disclosed in the present application are mutually replaced to form the technical solution.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model provides a LCD backlight source state detection system, which can detect the current and voltage of the backlight source in real time, thereby being capable of estimating the basic working state of the backlight source; meanwhile, the working state of the backlight source can be fed back in real time through the photosensitive sensor, and whether the backlight source is started or not can be effectively monitored, so that the state of the backlight source is effectively monitored, the system is simple and reliable, and the stability of the system is improved.
Drawings
FIG. 1 is a schematic diagram of an LCD backlight status detection system;
wherein, 1, detecting the controller; 11. a current voltage detection module; 2. a backlight source driving power supply; 3. a backlight source; 4. a photosensitive sensor; 5. and (4) an upper computer.
Detailed Description
As shown in fig. 1, an LCD backlight status detection system includes a detection controller 1 having a current and voltage detection module 11, a backlight driving power supply 2 having an anode connected in series in a current and voltage detection circuit between a backlight 3 and the current and voltage detection module 11, and a photosensor 4 preset in a backlight installation housing, where the photosensor 4 is connected to the detection controller 1, and the detection controller 1 has a communication serial port for connecting with an upper computer 5.
Still include with the host computer 5 that the output phase communication of detection controller 1 is connected still include with what host computer 5 is connected is used for real-time display 3 current and voltage's of backlight digital display still include with what host computer 5 is connected is used for reacting the early warning equipment of 3 current and voltage abnormal state of backlight still include with the state display equipment that host computer 5 is connected, the operating condition signal that host computer 5 received photo resistance changes into on and off control state display equipment.
The current and voltage detection module reports current and voltage detection data to the detection controller, backlight on and off signals are reported to the detection controller through a photosensitive sensor preset on the back of the backlight source, the detection controller compares the data with internal set data, and when the backlight source is in an on state, the current and the voltage are too large or too small, system alarm is caused.
The backlight source state detection system comprises the following steps:
(1) the positive electrode of the backlight source driving power supply is connected in series in the detection controller;
(2) the detection controller sends a detection result to the detection controller after sampling the voltage and the current, and the detection controller feeds the result back to the upper computer through a serial port;
(3) the photosensitive sensor feeds back the working state of the backlight source to the detection controller through the detection of the brightness of the backlight source, and the detection controller feeds back the working state of the photosensitive resistor to the upper computer through a serial port;
(4) the upper computer converts the received voltage and current signals of the backlight source into specific digital real-time display and makes related early warning measures according to preset working voltage and current values; on the other hand, the working state signal received by the photoresistor of the backlight source is converted into an on signal and an off signal, so that the on state and the off state of the backlight source are sensed.
The LCD backlight source state detection system can detect the current and voltage of the backlight source in real time, so that the basic working state of the backlight source can be presumed; meanwhile, the working state of the backlight source can be fed back in real time through the photosensitive sensor, and whether the backlight source is started or not can be effectively monitored, so that the state of the backlight source is effectively monitored, the system is simple and reliable, and the stability of the system is improved.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (6)
1. A LCD backlight source state detection system is characterized in that: the backlight source driving circuit comprises a detection controller (1) with a current and voltage detection module (11), a backlight source driving power supply (2) with an anode connected in series in a current and voltage detection circuit between a backlight source (3) and the current and voltage detection module (11), and a photosensitive sensor (4) used for being preset in a backlight source mounting shell, wherein the photosensitive sensor (4) is connected to the detection controller (1).
2. The LCD backlight status detection system according to claim 1, wherein: the detection controller (1) is provided with a communication serial port for connecting with an upper computer (5).
3. The LCD backlight status detection system according to claim 1, wherein: the device also comprises an upper computer (5) in communication connection with the output of the detection controller (1).
4. The LCD backlight status detection system of claim 3, wherein: the digital display is connected with the upper computer (5) and used for displaying the current and the voltage of the backlight source (3) in real time.
5. The LCD backlight status detection system of claim 3, wherein: the early warning device is connected with the upper computer (5) and used for reflecting the abnormal current and voltage state of the backlight source (3).
6. The LCD backlight status detection system of claim 3, wherein: the device is characterized by further comprising state display equipment connected with the upper computer (5), wherein the upper computer (5) receives working state signals of the photosensitive resistors and converts the working state signals into on and off control to control the state display equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023276261.6U CN214067528U (en) | 2020-12-30 | 2020-12-30 | LCD backlight source state detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023276261.6U CN214067528U (en) | 2020-12-30 | 2020-12-30 | LCD backlight source state detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214067528U true CN214067528U (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023276261.6U Active CN214067528U (en) | 2020-12-30 | 2020-12-30 | LCD backlight source state detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214067528U (en) |
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2020
- 2020-12-30 CN CN202023276261.6U patent/CN214067528U/en active Active
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