CN211656470U - LED system lighting test detector with electrode polarity indication function - Google Patents

Abstract

A light testing detector of an LED system with an electrode polarity indication function is composed of a shell (1), a direct current power supply (2) which is arranged in the shell and is powered by a battery, a switch circuit (3), a DC-AC high-frequency boosting inverter circuit (4), an electrode polarity indication circuit (5), an interface (6) arranged at the end part of the shell, an output line (8) with a plug (7) and a test pen (9), wherein the quality of the LED system such as an LED light source plate, an LED filament, an LED light bar and a COB is detected by a light testing method. During detection, the two test pens are respectively connected with the two input electrodes of the LED system, the positive and negative polarities of the electrodes do not need to be identified, and the LED system can be bright or good or not bright or bad. In addition, the electrode polarity indicating circuit can also indicate which test pen is connected with the positive electrode and the other test pen is connected with the negative electrode; the detector is also suitable for the test lighting detection of the whole LED lamp, so that the detector is suitable for technicians and salesmen of LED packaging enterprises and whole lamp production enterprises to be used as a portable real-time detection tool, and the small structure of the detector provides unprecedented convenience.

Description

LED system lighting test detector with electrode polarity indication function

Technical Field

The invention relates to the technical field of electric light source detection, in particular to an LED system lighting test detector with an electrode polarity indication function.

Background

Since this century, LED lighting has rapidly developed and is now replacing traditional lighting such as incandescent lamps, energy saving lamps and various gas discharge lamps. At present, more than 90 percent of illuminating lamps produced in China are LED lamps!

As is well known, the core component of an LED lamp is an LED assembly capable of emitting light, which is collectively referred to as an LED system, such as an LED light source board, an LED filament, an LED light bar, and a COB, etc., and in the process of developing and producing LED lighting products, technicians in a factory often need to randomly detect the quality of the LED system so as to be able to perform the next work with great care, and sellers often need to perform demonstrative detection of such products face to customers. However, the conventional detection means is inconvenient, and a matched driving power supply needs to be connected to light the LED system for observation. Because the working voltage and the working current of different LED systems are different, the matched driving power supplies are correspondingly different, and the time is often delayed for searching the matched driving power supplies; secondly, almost all driving power supplies need commercial power supply, and a commercial power socket is needed nearby, so that inconvenience is often caused; in addition, when the driving power is connected, the positive (+), negative (-) polarities of the two input electrodes of the LED system must be recognized, the (+) terminal of the driving power output must be connected, and the (-) terminal of the driving power output must be connected, which also increases the detection trouble. Therefore, there is a need for an apparatus capable of rapidly testing the quality of LED systems with various operating voltages and currents, and when the LED systems to be tested are connected, the positive (+), negative (-) polarities of the electrodes are not required to be identified, so that the testing is convenient and fast; the positive and negative polarities of the two electrodes of the LED system can be indicated in the test, so that convenience is provided for subsequent research and development, tests and other work; the test instrument is also portable without mains supply so as to realize convenient and rapid detection at any time and place. Unfortunately, the required test equipment is not only currently available in China, but is never seen at the annual, diverse international lighting and industrial exhibitions.

Disclosure of Invention

In order to meet the requirements of the LED system detector, the invention designs the LED system lighting test detector with the electrode polarity indication function.

Firstly, in order to meet the fundamental problem that whether an LED system is good or bad is quickly tested, the lighting method is most convenient and fast by utilizing the lighting characteristic of the LED, the LED can be lightened to emit light as long as current is input to the LED system, and the LED can be damaged if not emitted light; although specific parameters are not measured in detail, it is quite often necessary to quickly determine whether the LED system is good or bad.

In order to test and detect the LED systems with different rated voltages and rated currents, the output voltage of the detector is designed to be slightly higher than the highest working voltage of all the LED systems to be detected, so that all the LED systems can be lightened. In order to ensure that the phenomenon that the LED is damaged due to overlarge lighting current does not occur, the detection circuit is designed with a current limiting measure, so that various LED systems can be lighted, and the lighting current is far lower than the rated value of the LED systems.

In order to ensure that the polarity of an electrode of the LED system is not needed to be recognized in the lighting test and the test is more convenient and quicker, the high-frequency alternating voltage output by the DC-AC high-frequency boosting inverter circuit is adopted to light the LED system in a test mode, and the polarity of the output high-frequency voltage is alternately changed, so that the LED system can be lighted without recognizing the polarity of the polarity when the high-frequency voltage is connected with the input electrode of the LED system.

In order to indicate the polarity of the plus and minus of the LED system to be tested when the LED system is turned on, the output end of the high-frequency oscillation circuit is connected with an electrode polarity indicating circuit, the LED system is formed by connecting two LEDs with different light-emitting colors in a reverse parallel mode, a test pen connected with an output line is matched with the high-frequency oscillation circuit and also has two different colors, for example, the light-emitting colors of the two LEDs in the indicating circuit are respectively red and green, the colors of the two test pens are respectively red and black, when the red test pen is connected with the plus pole of the LED system, current flows through the red-light-emitting LED to emit red light, at the moment, the green-light LED connected with the red test pen in the reverse direction is cut off, no current flows through the red-light-emitting LED to emit light, namely; when the red test pen is connected with the negative pole, current flows through the green LED to emit green light, and the red LED connected with the red LED in the opposite direction is cut off and does not emit light, namely the green LED is bright and the red LED is not bright. Therefore, when the two test pens are arbitrarily connected with the two electrodes of the LED system, if the red LED is on and the green LED is not on, the red test pen is connected with the + pole and the other electrode is the-pole; on the contrary, if the green LED is bright and the red LED is not bright, the red pen is connected with the negative pole and the other electrode is the positive pole.

In order to conveniently implement the detection of the LED system at any time and any place, batteries are adopted for supplying power without commercial power. If the direct current voltage of the power supply is not affected by the continuous reduction of the battery voltage in the using process, the conventional DC-DC voltage boosting and stabilizing circuit can be accessed. When a lithium battery or other storage batteries are adopted, a conventional charging circuit and an interface thereof can be accessed.

The LED system lighting test detector with the electrode polarity indication function is formed by a shell (1), a direct current power supply (2) which is arranged in the shell and is powered by a battery, a switching circuit (3), a DC-AC high-frequency boosting inverter circuit (4), an electrode polarity indication circuit (5), an interface (6) arranged at the end part of the shell, an output line (8) with a plug (7) and a test pen (9). Wherein, the direct current power supply powered by the battery is the battery, or is formed by combining the battery, a charging circuit and a DC-DC voltage boosting and stabilizing conversion circuit; the switch circuit is a button switch or a toggle switch, or is formed by combining a light touch key switch and an automatic delay turn-off circuit; the DC-AC high-frequency boosting inverter circuit is a conventional circuit and consists of a push-pull high-frequency self-oscillation circuit consisting of a transistor and a high-frequency boosting transformer, and the primary and secondary boosting ratios of the boosting transformer are selected in the range of 1: 2 to 1: 100 in order to better adapt to LED systems with different voltage ranges; in order to reliably limit the test current from being excessively large, the input end of the inverter circuit is connected with a resistor of 1 omega to 20 omega in series; the electrode polarity display circuit is formed by connecting 2 LEDs with different light emitting colors (such as red and green) in an inverse parallel mode, or is formed by combining 2 LEDs with different light emitting colors and an interference suppression circuit in an inverse parallel mode; the output line test pen is 2 test pens with different colors (such as red and black).

The invention has the advantages of providing a device which can detect the quality of the LED system most simply and quickly, has extremely small volume and extremely light weight. During detection, the two test pens are respectively connected with the two input electrodes of the LED system, the positive and negative polarities of the electrodes do not need to be identified, and the LED system can be bright or good or not bright or bad. In addition, the electrode polarity indicating circuit can also indicate which test pen is connected with the positive electrode and the other test pen is connected with the negative electrode; the detector is also suitable for the test lighting detection of the whole LED lamp, such as an LED bulb lamp, an LED filament lamp, an LED lamp tube and the like, and the whole LED lamp product is also an LED system, so that the detector is suitable for being used as a portable real-time detection tool by technical personnel and sales personnel of LED packaging enterprises and whole lamp production enterprises, and the light structure of the detector provides unprecedented convenience.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of embodiment 1;

FIG. 3 is a schematic structural view of example 2;

FIG. 1. housing; 2. a direct current power supply; 3. a switching circuit; a DC-AC high frequency boost inverter circuit; electrode polarity display circuit; 6. an output interface and an input interface; 7. an output line plug; 8. an output line; 9. a test pen; 10. a battery; 11. a push-button switch or toggle switch; 12.2 LEDs with different light emitting colors and connected in parallel in an opposite direction; 13. a lithium battery charging circuit; 14, a DC-DC voltage boosting and stabilizing circuit; 15. a touch key switch; a time delay turn-off circuit; 17. an interference suppression circuit.

Detailed Description

Embodiment 1 of the present invention is a structure with the smallest volume, the smallest weight and the lowest cost, and a schematic structural diagram is shown in fig. 2. The outer contour of the housing has the size of about 97mm long, 24mm wide and 23mm thick, and the weight of the housing is about 50 g. Is powered by a section 16340 of lithium battery (10); one button switch or toggle switch (11) is a power switch; a conventional DC-AC high frequency boost inverter circuit (4) outputs high frequency alternating voltage, wherein the boost ratio of a boost transformer is 1: 40, and the input end of the inverter circuit is connected in series with a current limiting resistor of 5 omega; an LED emitting red light and an LED emitting green light are connected in reverse parallel to form an electrode polarity indicating circuit (12), and the colors of the 2 test pens (9) are red and black respectively. The adjusting circuit enables the red light LED to be bright when the red test pen is connected with the positive pole of the LED system, and the green light LED is not bright; when the red test pen is connected with the negative pole, the green LED is bright, and the red LED is not bright. An output interface (6) arranged on the end face of the shell and a plug (7) of the output lead are both conventional USB connectors.

Embodiment 2 of the present invention is a battery powered by a lithium battery, which has functions of outputting voltage that is not affected by the voltage change of the battery, charging the lithium battery in the device by using a conventional mobile phone charger, automatically shutting down the device after starting the device for about 5 minutes, and suppressing interference by electrode polarity indication, and the like, and a schematic structural diagram is shown in fig. 2. The outer contour of the housing has the size of 97mm long, 45mm wide and 23mm thick, and the weight of about 80 g. The direct current power supply is formed by combining a 16340 type lithium battery (10), a conventional lithium battery charging circuit (13) with the input of 5V and a conventional DC-DC boosting voltage stabilizing circuit (14) for boosting the voltage of 3.2V-4.2V of the lithium battery to 5V, and the input interface of the charging circuit is a conventional small interface matched with the output plug of the mobile phone charger; wherein the switch circuit is formed by combining a light touch key switch (15) and a conventional automatic delay turn-off circuit (16), and the delay time is adjusted to about 5 minutes; the DC-AC high-frequency boost inverter circuit (4) is a conventional circuit, the primary and secondary boost ratio of a boost transformer is 1: 70, and the input end of the boost transformer is connected with a 3 omega current-limiting resistor in series; the electrode polarity indicating circuit is formed by combining 2 LEDs (12) which are connected in reverse parallel and have different light emitting colors with a conventional interference suppression circuit (17). The other points not mentioned are the same as those in example 1.

Claims (6)

1. The LED system test lighting detector with electrode polarity indication function consists of casing, electronic circuit inside the casing, output and input interface in the end of the casing, two output lines with plug and test pen connected to the output and input interfaces.

2. The LED system lighting test detector with electrode polarity indication function as claimed in claim 1, wherein the DC power source powered by the battery is a battery, or is composed of a battery, a charging circuit and a DC-DC voltage boosting and stabilizing conversion circuit.

3. The LED system light-test detector with electrode polarity indication function as claimed in claim 1, wherein the switch circuit is a push-button switch or a toggle switch, or a combination of a touch-button switch and an automatic delay-off circuit.

4. The detector as claimed in claim 1, wherein the DC-AC high frequency boost inverter circuit comprises a high frequency self-oscillation circuit consisting of a transistor and a high frequency boost transformer, the boost ratio of the primary and secondary of the boost transformer is 1: 2 to 1: 100, and the input terminal of the circuit is connected in series with a current limiting resistor of 1 Ω to 20 Ω.

5. The LED system pilot detector with electrode polarity indication function according to claim 1, wherein the electrode polarity indication circuit is formed by connecting 2 LEDs with different colors in inverse parallel, or by combining 2 LEDs with different colors in inverse parallel with interference suppression circuit.

6. The LED system test lighting detector with electrode polarity indication function according to claim 1, wherein the test pens connected with the 2 output lines are test pens with two different colors.

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