Tweezers capable of lightening and testing LED lamp beads

Abstract

The utility model relates to the technical field of LED lamp bead testing, and discloses a pair of tweezers which is convenient to maintain and detect, is simple and convenient to operate and can be used for testing LED lamp beads in a lightening manner, and comprises a main control circuit (10) used for testing the LED lamp beads; wherein the charging circuit (101) is used for receiving an externally input voltage signal; the input end of the LED lamp detection lightening circuit (103) is connected with the output end of the charging circuit (101) and used for receiving voltage signals, the output end of the LED lamp detection lightening circuit (103) is connected with the two ends of tweezers respectively, and the input voltage signals are applied to the positive electrode and the negative electrode of a detected LED lamp bead through the two ends of the tweezers.

Description

Technical Field

[0001] The utility model relates to the technical field of LED lamp bead testing, and more specifically to a pair of tweezers capable of lighting and testing LED lamp beads. Background Art

[0002] LED (Light Emitting Diode) is a solid-state semiconductor device. When welding LED, the performance of LED needs to be tested. The existing detection method is to use the multimeter R×10k to measure the forward and reverse resistance values ​​of LED. Normally, the forward resistance value (when the black test pen is connected to the positive pole) is about 10~20kΩ, and the reverse resistance value is 250kΩ~∞ (infinity). When measuring the forward resistance value of a light-emitting diode with higher sensitivity, a faint light will be emitted from the tube. The operation of the detection method is not simple enough. Since most of the existing LEDs have been made into surface mount packages instead of traditional LED packages with pin plug-ins, the size of the LED is small, which increases the difficulty of operation and reduces the detection efficiency.

[0003] Therefore, how to provide an LED test tweezer that is easy to operate and convenient for maintenance and detection is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0004] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art that most of the existing LEDs have been made into surface mount packages rather than traditional packages with pin plug-in LEDs, and the size of the LEDs is small, resulting in increased difficulty in operation and low detection efficiency, a pair of tweezers that can light up and test LED lamp beads are provided, which are convenient for maintenance and detection and easy to operate.

[0005] The technical solution adopted by the utility model to solve the technical problem is: construct a pair of tweezers capable of lighting and testing LED lamp beads, which includes a main control circuit for testing LED lamp beads; wherein,

[0006] The main control circuit includes a charging circuit and an LED lamp detection and lighting circuit.

[0007] The charging circuit is arranged at the front end of the main control circuit, and is used to receive an external input voltage signal;

[0008] The input end of the LED lamp detection and lighting circuit is connected to the output end of the charging circuit to receive the voltage signal.

[0009] The output ends of the LED lamp detection and lighting circuit are respectively connected to the two ends of the tweezers, and the input voltage signal is applied to the positive and negative electrodes of the LED lamp bead being detected through the two ends of the tweezers.

[0010] In some embodiments, the LED lamp detection and lighting circuit includes a protection branch, one end of the protection branch is connected to one end of the tweezers, and the other end of the protection branch is connected to the other end of the tweezers.

[0011] When the current at both ends of the tweezers is too large or short-circuited, the protection branch is controlled to be turned on, and the voltage at both ends of the tweezers is pulled down to 0V.

[0012] In some embodiments, the LED lamp detection and lighting circuit includes at least a first MOS tube and a first transistor.

[0013] The gate of the first MOS tube is connected to the output end of the charging circuit through a first resistor.

[0014] The drain of the first MOS tube is connected to one end of the tweezers.

[0015] The source of the first MOS tube is connected to the base of the first transistor through a second resistor.

[0016] The source of the first MOS tube is connected to the emitter of the first transistor through a third resistor.

[0017] The collector of the first transistor is connected to the gate of the first MOS transistor.

[0018] In some implementations, the first MOS transistor is selected as an N-channel enhancement mode MOS transistor.

[0019] The first transistor is selected as an NPN transistor.

[0020] In some embodiments, the LED lamp detection and lighting circuit further includes a polymer lithium battery.

[0021] The positive electrode of the polymer lithium battery is connected to the output end of the charging circuit.

[0022] The negative electrode of the polymer lithium battery is connected to the emitter of the first transistor.

[0023] In some embodiments, the LED lamp detection and lighting circuit further includes a second capacitor.

[0024] One end of the second capacitor is connected to the output end of the charging circuit,

[0025] The other end of the second capacitor is connected to the common end.

[0026] In some embodiments, the charging circuit includes a first capacitor, a third capacitor and a power module.

[0027] The first capacitor is connected in parallel with the third capacitor,

[0028] The first capacitor and the third capacitor are connected in parallel to the input end of the power module,

[0029] The output end of the power module is connected to one end of the tweezers.

[0030] In some embodiments, the charging circuit further includes a voltage regulator tube.

[0031] The two ends of the voltage regulator tube are arranged at the two ends of the output side of the USB interface.

[0032] In the tweezers capable of lighting up and testing LED lamp beads described in the utility model, it includes a main control circuit for testing LED lamp beads; wherein the charging circuit is used to receive an external input voltage signal; the LED lamp detection and lighting circuit is used to receive the voltage signal, and the output end of the LED lamp detection and lighting circuit is respectively connected to the two ends of the tweezers, and the input voltage signal is applied to the positive and negative poles of the LED lamp bead to be tested through the two ends of the tweezers. Compared with the prior art, by setting the LED lamp detection and lighting circuit, the voltage signal obtained is added to the end of the tweezers, so that the LED lamp bead placed at the end of the tweezers is lit, and at this time, the color of the LED, the polarity of the LED, whether the LED is damaged, and whether the LED light emission is normal can be observed and judged, thereby achieving the test purpose of lighting the LED, and can effectively solve the problem that the traditional packaging of the LED with pin plug-in has increased difficulty in operation and low detection efficiency due to the small size of the LED. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0034] Figure 1 The utility model provides a main control circuit diagram of an embodiment of tweezers capable of lighting and testing LED lamp beads. DETAILED DESCRIPTION

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0036] like Figure 1 As shown, in the first embodiment of the tweezers capable of lighting up and testing LED lamp beads of the utility model, the tweezers capable of lighting up and testing LED lamp beads include a main control circuit 10 for testing LED lamp beads, which includes a charging circuit 101, a polymer lithium battery 102 and an LED lamp detection and lighting circuit 103.

[0037] The charging circuit 101 is used to receive the voltage signal input from the previous circuit, filter and stabilize the input voltage, and then output it to the polymer lithium battery 102 and the LED light detection and lighting circuit 103;

[0038] The polymer lithium battery 102 is used to store power and provide a working power signal for the LED lamp detection and lighting circuit 103;

[0039] The LED lamp detection and lighting circuit 103 inputs voltage signals to both ends of the tweezers (corresponding to TW1 ), thereby providing detection voltage signals to the LED lamps at both ends of the tweezers (corresponding to TW1 ); and

[0040] It has the function of overcurrent or overvoltage protection. When the current at the two end points V+ / V- of the tweezers (corresponding to TW1) is too large or short-circuited, the voltage of the series circuit increases, making the protection branch conductive and pulling the voltage level of the two end points V+ / V- of the tweezers (corresponding to TW1) to 0V.

[0041] Specifically, the charging circuit 101 is arranged at the front end of the main control circuit 10, and is used to receive an external input voltage signal (such as 5V-12V), stabilize and filter the input voltage signal (such as 5V-12V), and then output it to the polymer lithium battery 102 and the LED lamp detection and lighting circuit 103;

[0042] Furthermore, the input end of the LED lamp detection and lighting circuit 103 is connected to the output end of the charging circuit 101, and is used to receive a voltage signal (such as 4.2V) that has been stabilized and filtered;

[0043] The output ends of the LED lamp detection and lighting circuit 103 are respectively connected to the two ends (corresponding to V+ and V-) of the tweezers (corresponding to TW1), and the input voltage signal (such as 4.2V) is applied to the positive / negative poles of the LED lamp bead being detected through the two ends (corresponding to V+ and V-) of the tweezers (corresponding to TW1), so that the LED lamp bead is lit. At this time, the color of the LED, the polarity of the LED, whether the LED is damaged, and whether the LED emits light normally are observed and judged, thereby achieving the test purpose of lighting the LED.

[0044] By using the technical solution, an LED light detection and lighting circuit is set up, and the voltage signal obtained is added to the end of the tweezers, so that the LED lamp bead placed at the end of the tweezers is lit. At this time, the color of the LED, the polarity of the LED, whether the LED is damaged, and whether the LED emits light normally can be observed and judged, thereby achieving the test purpose of lighting the LED. It can effectively solve the problem of traditional packaging of LEDs with pin plug-ins, which has increased operation difficulty and low detection efficiency due to the small size of the LED.

[0045] In some embodiments, in order to improve the safety of the LED lamp to be detected, a protection branch circuit may be provided in the LED lamp detection lighting circuit 103, wherein one end of the protection branch circuit is connected to one end (corresponding to V+) of the tweezers (corresponding to TW1), and the other end of the protection branch circuit is connected to the other end (corresponding to V-) of the tweezers (corresponding to TW1).

[0046] When the current at both ends (corresponding to V+ and V-) of the tweezers (corresponding to TW1) is too large or short-circuited, the protection branch is controlled to be turned on, and the voltage at both ends (corresponding to V+ and V-) of the tweezers (corresponding to TW1) is pulled down to 0V, thereby achieving the protection function.

[0047] In some embodiments, the LED lamp detection and lighting circuit 103 at least includes a first MOS transistor Q102 and a first triode Q101, wherein the first MOS transistor Q102 is selected as an N-channel enhancement type MOS transistor.

[0048] The first transistor Q101 is selected as an NPN transistor, which has a switch function.

[0049] Specifically, the gate of the first MOS tube Q102 is connected to the output end of the charging circuit 101 through the first resistor R101, and one end of the first resistor R101 is also connected to one end (corresponding to V+) of the tweezers (corresponding to TW1).

[0050] The drain of the first MOS tube Q102 is connected to the other end (corresponding to V-) of the tweezers (corresponding to TW1), and the source of the first MOS tube Q102 is connected to the base of the first transistor Q101 through the second resistor R102.

[0051] The source of the first MOS transistor Q102 is connected to the emitter of the first triode Q101 through the third resistor R103 , and the collector of the first triode Q101 is connected to the gate of the first MOS transistor Q102 .

[0052] Specifically, in the working and lighting LED test state: the discharge current of the battery BT1 flows to one end (corresponding to V+) of the tweezers (corresponding to TW1) through the fuse F1. At this time, the LED lamp bead detected between the V+ terminal and the V- terminal flows to the drain of the first MOS tube Q102, and at the same time, the gate of the first MOS tube Q102 is turned on by the power supply of the first resistor R101;

[0053] The current passes through the source of the first MOS tube Q102 and the third resistor R103 and returns to the common terminal GND, so that the LED lamp bead is lit. At this time, the color of the LED, the polarity of the LED, whether the LED is damaged, and whether the LED emits light normally can be observed and judged, thereby achieving the test purpose of lighting the LED.

[0054] In some embodiments, the LED lamp detection and lighting circuit 103 also includes a polymer lithium battery 102, wherein the positive electrode of the polymer lithium battery 102 is connected to the output end of the charging circuit 101 for receiving a voltage signal, and the negative electrode of the polymer lithium battery 102 is connected to the emitter of the first transistor Q101.

[0055] In some implementations, the LED lamp detection and lighting circuit 103 further includes a second capacitor C102 which has a filtering function.

[0056] One end of the second capacitor C102 is connected to the output end of the charging circuit 101 , and the other end of the second capacitor C102 is connected to the common end.

[0057] In some embodiments, the charging circuit 101 includes a first capacitor C101, a third capacitor C103, and a power module U101, wherein the first capacitor C101 and the third capacitor C103 are connected in parallel.

[0058] The first capacitor C101 and the third capacitor C103 are connected in parallel to the input terminal (corresponding to pin 1) of the power module U101.

[0059] The output end (corresponding to pin 2) of the power module U101 is connected to one end (corresponding to V+) of the tweezers (corresponding to TW1).

[0060] In some embodiments, the charging circuit 101 further includes a voltage regulator tube ZD2, wherein two ends of the voltage regulator tube ZD2 are arranged at two ends of the output side of the USB interface.

[0061] Charging status: USB+5V charges the lithium battery BAT1 through the charging power module U101 control circuit. When the polymer lithium battery BAT1 is charged to 4.2V, the power module U101 will automatically stop charging and will not overcharge the lithium battery BAT1. Generally, it can be fully charged in 1 hour. If it is not fully charged, it can also be used normally.

[0062] It should be noted that the protection branch is formed by connecting the first resistor R101, the first transistor Q101, the second resistor R102, the third resistor R103, the fourth resistor R104 and the first MOS transistor Q102, which serves as an overcurrent insurance circuit for detecting LED lighting.

[0063] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. A pair of tweezers capable of lighting a test LED lamp bead, characterized in that: It includes a main control circuit for testing LED lamp beads; wherein, The main control circuit includes a charging circuit and an LED lamp detection and lighting circuit. The charging circuit is arranged at the front end of the main control circuit, and is used to receive an external input voltage signal; The input end of the LED lamp detection and lighting circuit is connected to the output end of the charging circuit to receive the voltage signal. The output ends of the LED lamp detection and lighting circuit are respectively connected to the two ends of the tweezers, and the input voltage signal is applied to the positive and negative electrodes of the LED lamp bead being detected through the two ends of the tweezers.

2. The tweezers capable of lighting and testing LED lamp beads according to claim 1, characterized in that: The LED lamp detection and lighting circuit comprises a protection branch, one end of the protection branch is connected to one end of the tweezers, and the other end of the protection branch is connected to the other end of the tweezers. When the current at both ends of the tweezers is too large or short-circuited, the protection branch is controlled to be turned on, and the voltage at both ends of the tweezers is pulled down to 0V.

3. The tweezers capable of lighting and testing LED lamp beads according to claim 2, characterized in that: The LED lamp detection and lighting circuit at least includes a first MOS tube and a first transistor. The gate of the first MOS tube is connected to the output end of the charging circuit through a first resistor. The drain of the first MOS tube is connected to one end of the tweezers. The source of the first MOS tube is connected to the base of the first transistor through a second resistor. The source of the first MOS tube is connected to the emitter of the first transistor through a third resistor. The collector of the first transistor is connected to the gate of the first MOS transistor.

4. The tweezers capable of lighting and testing LED lamp beads according to claim 3, characterized in that: The first MOS transistor is selected as an N-channel enhancement type MOS transistor, The first transistor is selected as an NPN transistor.

5. The tweezers capable of lighting and testing LED lamp beads according to claim 3, characterized in that: The LED lamp detection and lighting circuit also includes a polymer lithium battery. The positive electrode of the polymer lithium battery is connected to the output end of the charging circuit, and the negative electrode of the polymer lithium battery is connected to the emitter of the first transistor.

6. The tweezers capable of lighting and testing LED lamp beads according to claim 5, characterized in that: The LED lamp detection and lighting circuit also includes a second capacitor, One end of the second capacitor is connected to the output end of the charging circuit, The other end of the second capacitor is connected to the common end.

7. The tweezers capable of lighting and testing LED lamp beads according to claim 1, characterized in that: The charging circuit includes a first capacitor, a third capacitor and a power module. The first capacitor is connected in parallel with the third capacitor, The first capacitor and the third capacitor are connected in parallel to an input end of the power module, and an output end of the power module is connected to one end of the tweezers.

8. The tweezers capable of lighting and testing LED lamp beads according to claim 7, characterized in that: The charging circuit also includes a voltage regulator tube. The two ends of the voltage regulator tube are arranged at the two ends of the output side of the USB interface.

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