CN111474458A - L ED light source test tool and L ED light source test system - Google Patents

Abstract

The invention discloses an LED light source testing tool and an LED light source testing system. The LED light source testing tool includes: an LED mounting substrate, which is configured to install the LED lamp beads to be tested; , to conduct contact heat dissipation for the LED mounting substrate; the mechanical press switch, which is driven and connected to the radiator, is configured to drive the radiator to move toward the LED mounting substrate when triggered; the photoelectric detection switch is configured to detect the moving position of the radiator, and output the corresponding detection signal; the power supply control module is electrically connected to the photoelectric detection switch, and is configured to supply power to the LED lamp bead to be tested when the radiator is determined to move to the preset position according to the detection signal output by the photoelectric detection switch. The invention can ensure that the radiator and the LED mounting substrate are in good contact with the test, protect the light source test tool and the LED lamp beads, and help improve the accuracy of the LED light source test.

Description

LED light source test tool and LED light source test system

technical field

The invention relates to the technical field of LED testing, in particular to an LED light source testing tool and an LED light source testing system.

Background technique

LEDs mostly use metal mounting substrates and heat dissipation substrates to achieve carrying and heat dissipation functions. LED light sources have the characteristics of high brightness, high power, and serious heat generation. Therefore, when testing LEDs, it is necessary to ensure that the heat of the LED light source can be timely and effective. If the metal mounting substrate and the heat dissipation substrate bracket are not in good contact, the heat dissipation of the LED light source will be poor, the luminous flux of the LED light source will be low, the accuracy of the test will be reduced, and it will easily lead to limited luminous brightness, damaged life, and LED lights. Problems such as bead burning occur.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to propose an LED light source test tool and an LED light source test system, aiming at improving the accuracy of the LED light source test.

In order to achieve the above purpose, the present invention provides an LED light source test tool, the LED light source test tool includes:

The LED mounting substrate is configured to install the LED lamp beads to be tested;

a heat sink, configured to contact and dissipate heat to the LED mounting substrate when the LED lamp bead to be tested is tested;

a mechanical push switch, drivingly connected to the heat sink, configured to drive the heat sink to move toward the LED mounting substrate when triggered;

a photoelectric detection switch, configured to detect the moving position of the radiator, and output a corresponding detection signal;

A power supply control module, electrically connected to the photoelectric detection switch, is configured to supply power to the LED lamp beads to be tested when it is determined according to the detection signal output by the photoelectric detection switch that the heat sink moves to a preset position.

Optionally, the LED light source test tool further includes a fan, and the fan is electrically connected to the power supply control;

The power supply control module is further configured to drive the fan to work when it is determined according to the detection signal output by the photoelectric detection switch that the heat sink moves to a preset position, so as to dissipate heat to the LED mounting substrate to be tested.

Optionally, the photoelectric detection switch includes:

Light control circuit board;

a photoelectric transmitter and a photoelectric receiver, arranged on the light control circuit board;

A photodetector, the photodetector is formed with a first accommodating cavity and a second accommodating cavity opposite to the groove in the direction away from the light control circuit board, and the phototransmitter is accommodated in the first container The photoelectric receiver is accommodated in the second accommodating cavity.

Optionally, the LED light source test tool also includes:

a box body, the upper end of the box body is open, and the photoelectric detection switch is arranged on one side wall of the box body;

a box cover, arranged above the box body;

The grating block is arranged on a side wall of the box cover, and the position of the grating block corresponds to the photoelectric detection switch; when the radiator moves to a preset position, the grating block extends into the into the groove formed by the first accommodating cavity and the second accommodating cavity.

Optionally, the LED light source test tool also includes:

The support part is arranged on the box body, and the photoelectric detection switch is fixedly installed on the support part.

Optionally, the box body and the box cover are further provided with installation grooves, and the mechanical press switch is arranged in the installation grooves on the box body;

The mechanical push switch has a locked state and an unlatched state; when the mechanical push switch is in a locked state, the box body and the box cover are locked and connected, so that the grating block extends into all in the groove formed by the first accommodating cavity and the second accommodating cavity;

When the mechanical push switch is in the unlocked state, the box cover is opened and connected from the box body, so that the grating block is formed from the first accommodating cavity and the second accommodating cavity out of the groove.

Optionally, the photoelectric detection switch further includes a first pull-up resistor and a second pull-up resistor, the first pull-up resistor is arranged in series between the first DC power supply and the photoelectric transmitter, and the second pull-up resistor is connected in series. A pull-up resistor is arranged in series between the first DC power supply and the photoelectric receiver.

Optionally, the power supply control module includes a main controller and a power supply, a signal feedback terminal of the main controller is connected to the photoelectric detection switch, and a control terminal of the main controller is connected to the power supply;

The main controller is configured to control the power supply to supply power to the LED lamp beads to be tested when it is determined according to the detection signal output by the photoelectric detection switch that the heat sink moves to a preset position.

Optionally, the main controller is further configured to enter a test mode when it is determined according to the detection signal output by the photoelectric detection switch that the heat sink moves to a preset position, so as to test the LED lamp bead to be tested.

The present invention also provides an LED light source testing system, the LED light source testing system includes the above-mentioned LED light source testing tool.

In the present invention, an LED mounting substrate is arranged to mount the LED lamp beads to the LED lamp bead to be tested; a heat sink is used to conduct contact heat dissipation for the LED mounting substrate when the LED lamp bead to be tested is tested; The heat sink drives the connected mechanical push switch, so as to drive the heat sink to move toward the LED mounting substrate when triggered, and detect the movement position of the heat sink by setting the photoelectric detection switch, and output the corresponding detection signal, so that the power supply control When the module determines that the radiator moves to the preset position according to the detection signal output by the photoelectric detection switch, it supplies power to the LED lamp beads to be tested. The invention detects whether the contact between the heat sink and the LED mounting substrate is good through the photoelectric detection switch, so as to trigger the power supply control module to supply power to the LED lamp beads on and off, which can prevent the mechanical pressing switch from being pressed or not pressed in place. The power supply of the LED lamp beads is beneficial to ensure that the LED light source test is performed when the heat sink and the LED mounting substrate are in good contact, effectively protecting the light source test tool and the LED lamp beads, and improving the accuracy of the LED light source test.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

FIG. 1 is a schematic diagram of the circuit structure of an embodiment of an LED light source testing tool of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of an LED light source testing tool of the present invention;

3 is a side view of an embodiment of the LED light source test fixture in FIG. 2;

Fig. 4 is the partial enlarged view of A place in Fig. 3;

5 is a schematic diagram of the circuit structure of an embodiment of a photoelectric detection switch in an LED light source test fixture of the present invention;

FIG. 6 is a schematic diagram of a circuit structure of another embodiment of the LED light source testing tool of the present invention.

Description of reference numbers:

label name label name 10 LED mounting substrate 42 phototransmitter 20 heat sink 43 Photoelectric receiver 30 Mechanical push switch 44 Photoelectric detector 40 Photoelectric detection switch 441 first accommodating cavity 50 Power supply control module 442 second accommodating cavity 60 fan 51 main controller 70 box 52 Power supply 80 box cover 61 support 90 grating blanks 41 Light control circuit board

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

The invention provides an LED light source testing tool.

Referring to FIG. 1, in an embodiment of the present invention, the LED light source test tool includes:

The LED mounting substrate 10 is configured to mount the LED lamp beads to be tested;

The heat sink 20 is configured to conduct contact heat dissipation for the LED mounting substrate 10 when the LED lamp bead to be tested is tested;

a mechanical push switch 30, drivingly connected to the heat sink 20, and configured to drive the heat sink 20 to move toward the LED mounting substrate 10 when triggered;

The photoelectric detection switch 40 is configured to detect the moving position of the radiator 20 and output a corresponding detection signal;

The power supply control module 50, which is electrically connected to the photoelectric detection switch 40, is configured to supply power to the LED lamp bead to be tested when it is determined according to the detection signal output by the photoelectric detection switch 40 that the heat sink 20 moves to a preset position .

In this embodiment, the LED mounting substrate 10 is used to mount the LED lamp beads. In practical application, the LED mounting substrate 10 is provided with a circuit wiring layer and pads, and the LED lamp beads can be welded by conductive glue, solder, etc. On the pads of the mounting substrate 10 , the LED lamp beads are connected with the circuit devices on the LED mounting substrate 10 and the LED lamp beads by binding wires. The LED mounting substrate 10 can be implemented by using a metal substrate, such as an aluminum substrate or a copper substrate, so as to improve the heat dissipation efficiency of the LED lamp beads.

The heat sink 20 can optionally use a metal heat sink, which is used to improve the heat dissipation efficiency of the LED lamp bead. When testing the luminous flux and color of the LED lamp bead, the heat sink 20 and the LED mounting substrate 10 on which the LED lamp is installed are tested. Contact to dissipate the heat generated by the LED lamp beads in time.

The mechanical press switch 30 is drivingly connected to the heat sink 20 , specifically, elastically connected by an elastic member. When the mechanical press switch 30 is pressed, the heat sink 20 moves toward the LED mounting substrate 10 , so that the heat sink 20 is connected to the LED mounting substrate 10 . Contact connection. When the mechanical push switch 30 is reset, the heat sink 20 moves away from the LED mounting substrate 10 , and at this time, the heat sink 20 is spaced from the LED mounting substrate 10 .

It should be noted that the LED light source has high brightness and high power, so the LED lamp beads generate a lot of heat during the working process. If the LED lamp beads cannot be dissipated in time, the service life of the LED lamp beads will be affected, and even burn out in severe cases. LED lamp beads. During the test, if the LED lamp beads cannot be dissipated in time, the luminous flux of the LED light source will be low, which will limit the luminous brightness, damage the lifespan, and even burn the LED lamp beads. Therefore, in the process of testing, it is necessary to ensure good contact between the heat sink 20 and the LED mounting substrate 10 . Therefore, how to identify and detect whether the contact between the LED mounting substrate 10 and the heat sink 20 is good has become a research direction for protecting the LED lamp beads. Generally, to detect whether the contact between the LED mounting substrate 10 and the heat sink 20 is good, Hall-type, capacitive-type, eddy-current and other switches are usually used. However, the Hall-type switch needs the detection object to be a magnetic object; capacitive switch It is usually used to detect various conductive or non-conductive liquids or solids; the eddy current switch is scattered due to the alternating magnetic field generated by the high-frequency oscillating coil, so that when the metal object is constantly approaching the front end of the sensor or around the sensor It will also send out a signal, which is easy to interfere with the test results and is easily triggered by the environment.

To this end, in this embodiment, a photoelectric detection switch 40 is provided, a light source circuit is arranged in the photoelectric detection switch 40, and the output end S_P of the photoelectric detection switch 40 is connected to the power supply control module 50, and a light emitter can be used to reflect the light reflected from the surface of the object. The light intensity is used to determine the presence or absence of an object, so as to detect whether the mechanical push switch 30 is pressed and whether it is pressed in place when a contact connection is achieved between the LED mounting substrate 10 and the heat sink 20 by pressing the mechanical pressing switch 30 . For example, when the photoelectric detection switch 40 detects that the movement position of the radiator 20 has not reached the preset position, it outputs a low level detection signal, and when it detects that the movement position of the radiator 20 reaches the preset position, it outputs a high level level detection signal.

The power supply control module 50 and the LED mounting substrate 10 may be electrically connected through a cable or a flexible substrate, so as to control the power output of the LED lamp beads during the test, thereby supplying power to the LED lamp beads. Specifically, the power supply control module 50 determines whether the radiator 20 has moved to the preset position according to the control signal output by the photoelectric detection switch 40 : when the output is a low level detection signal, it is determined that the radiator 20 and the LED mounting substrate are at this time. The power supply control module 50 does not supply power to the LED lamp beads; and when the output is a high-level detection signal, it is determined that the heat sink 20 and the LED mounting substrate 10 are in contact and connected at this time, and the power supply control module 50 starts to supply power to the LED lamp beads. That is, in this embodiment, only when the power supply control module 50 determines that the contact between the heat sink 20 and the LED mounting substrate 10 is good, the power supply to the LED lamp beads is started, and the power supply module determines that the contact between the heat sink 20 and the LED mounting substrate 10 is in contact with each other. When it is not good, the power supply of the LED lamp beads will not be started. This setting is beneficial to ensure that the LED lamp beads dissipate well during the test, and prevent the LED lamp beads from being burned due to untimely heat dissipation.

In the present invention, the LED mounting substrate 10 is provided to mount the LED lamp beads to the LED lamp bead to be tested; the heat sink 20 is used to conduct contact heat dissipation for the LED mounting substrate 10 when the LED lamp bead to be tested is tested; There is a mechanical push switch 30 connected to the radiator 20 to drive the radiator 20 to move toward the LED mounting substrate 10 when triggered, and a photoelectric detection switch 40 is provided to detect the movement position of the radiator 20 and output Corresponding detection signal, so that the power supply control module 50 supplies power to the LED lamp bead to be tested when it is determined according to the detection signal output by the photoelectric detection switch 40 that the radiator 20 moves to the preset position. In the present invention, the photoelectric detection switch 40 is used to detect whether the contact between the heat sink 20 and the LED mounting substrate 10 is good, so as to trigger the power supply control module 50 to supply power to the LED lamp beads, which can prevent the mechanical pressing switch 30 from not being pressed, or Supplying power to the LED lamp bead when it is not pressed in place is beneficial to ensure that the LED light source test is performed when the heat sink 20 and the LED mounting substrate 10 are in good contact, effectively protecting the light source test tool and the LED lamp bead, and improving the accuracy of the LED light source test.

1, in one embodiment, the LED light source test tool further includes a fan 60, and the fan 60 is electrically connected to the power supply control;

The power supply control module 50 is further configured to drive the fan 60 to work when it is determined according to the detection signal output by the photoelectric detection switch 40 that the heat sink 20 moves to a preset position, so as to perform the operation on the LED mounting substrate 10 to be tested. heat dissipation.

In this embodiment, the position of the fan 60 corresponds to the LED mounting substrate 10 , and is controlled by the power supply control module 50 to dissipate heat to the LED lamp beads during operation. Specifically, the power supply control module 50 determines whether the radiator 20 has moved to the preset position according to the control signal output by the photoelectric detection switch 40 : when the output is a low level detection signal, it is determined that the radiator 20 and the LED mounting substrate are at this time. 10, the power supply control module 50 controls the fan 60 to stand by; and when the output is a high-level detection signal, it is determined that the heat sink 20 and the LED mounting substrate 10 are in contact and connected at this time, and the power supply control module 50 The fan 60 is controlled to dissipate heat to the LED lamp beads.

Referring to FIG. 2 or FIG. 3 , in one embodiment, the photoelectric detection switch 40 includes:

Light control circuit board 41;

The photoelectric transmitter 42 and the photoelectric receiver 43 are arranged on the light control circuit board 41;

A photodetector 44, the photodetector 44 is protruded from the direction away from the light control circuit board 41 with a first accommodating cavity 441 and a second accommodating cavity 442 arranged oppositely, and the phototransmitter 42 is accommodated in In the first accommodating cavity 441 , the photoelectric receiver 43 is accommodated in the second accommodating cavity 442 .

In this embodiment, the light control circuit board 41 is used to install the phototransmitter 42 and the photoelectric receiver 43. The photodetector 44 can be realized by a transparent material. The photodetector 44 can be covered on the light control circuit board 41, or can It is fixedly connected with the light control circuit board 41 . The phototransmitter 42 extends into the first accommodating cavity 441 , the photoelectric receiver 43 extends into the second accommodating cavity 442 , and a groove is formed between the first accommodating cavity 441 and the second accommodating cavity 442 . When the heat sink 20 does not move to the preset position, the grating block 90 for detection by the photoelectric detection switch 40 does not extend into the groove, and the optical signal sent by the photoelectric transmitter 42 is received by the photoelectric receiver 43, thereby generating and A low-level electrical signal is output. When the heat sink 20 moves to the preset position, the grating block 90 extends into the groove, thereby preventing the optical signal from the phototransmitter 42 from being received by the photoelectric receiver 43 . At this time, the photoelectric detection switch 40 outputs a high voltage flat electrical signal. In this way, the power supply control module 50 can determine whether the contact between the heat sink 20 and the LED mounting substrate 10 is good according to the inversion of the signal of the photoelectric detection switch 40 . The size of the first accommodating cavity 441 and the second accommodating cavity 442 can be set according to actual needs, and the groove gap formed by the first accommodating cavity 441 and the second accommodating cavity 442 is larger than the thickness of the grating shutter 90 to ensure The gap allows the grating shutter 90 to extend into the groove. The first accommodating cavity 441 is slightly larger than the photoelectric transmitter 42 , and the second accommodating cavity 442 is slightly larger than the photoelectric receiver 43 .

Referring to FIG. 2 or FIG. 3 , in one embodiment, the LED light source test fixture further includes:

a box body 70, the upper end of the box body 70 is open, and the photoelectric detection switch 40 is arranged on a side wall of the box body 70;

The box cover 80 is arranged above the box body 70;

The grating blocking piece 90 is arranged on a side wall of the box cover 80, and the position of the grating blocking piece 90 corresponds to the photoelectric detection switch 40; When setting the position, it extends into the groove formed by the first accommodating cavity 441 and the second accommodating cavity 442 .

In this embodiment, the box body 70 is provided with a test module for optical testing of the LED lamp beads, such as a luminous flux test module, etc. When a test environment that avoids light is required, the box cover 80 is covered on the box body 70 , a closed space is formed, and the box cover 80 and the box body 70 can be connected by rotation or sliding. The grating block 90 is arranged on the box cover 80 and moves with the movement of the box cover 80. When the box cover 80 is closed on the box body 70 and the mechanical pressing switch 30 is pressed, the box cover 80 and the box body 70 completely covered. At this time, the grating shield 90 extends into the groove formed by the first accommodating cavity 441 and the second accommodating cavity 442, so that when the mechanical pressing switch 30 drives the heat sink 20 to move to the preset position, the grating shield 90 can pass through the grating shield. Whether the 90 protrudes into the groove and blocks the light signal emitted by the photo-emitter 42 from being received by the photo-receiver 43 to detect whether the contact between the heat sink and the LED mounting substrate 10 is good. In this way, the photoelectric detection switch 40 does not need to directly contact the LED mounting substrate 10 and/or the heat dissipation substrate to detect whether the contact between the heat sink and the LED mounting substrate 10 is good, the operation is simple, the implementation is convenient, and the detection accuracy can be improved. .

Referring to FIG. 2 or FIG. 3 , in one embodiment, the LED light source test fixture further includes:

The support portion 61 is disposed on the box body 70 , and the photoelectric detection switch 40 is fixedly mounted on the support portion 61 .

In this embodiment, the LED light source testing tool also includes an electric control board, which may be a circuit board for installing the photoelectric transmitter 42 and the photoelectric receiver 43 in the photoelectric detection switch 40 . The light control circuit board 41 is integrated with a circuit module for cooling and supplying power to the LED lamp beads, or can also be integrated with a control circuit and a detection circuit for LED lamp source testing, and the like. The support portion 61 is disposed on the box body 70 , and can be integrally formed with the box body 70 , or can be detachably mounted on the box body 70 . The light control circuit board 41 with the photodetection switch 40 mounted thereon is mounted on the support portion 61 , so that the photodetection switch 40 can detect whether the LED mounting substrate 10 and the heat dissipation substrate are in good contact during the LED light source test.

In one embodiment, the box body 70 and the box cover 80 are further provided with installation grooves (not marked in the figure), and the mechanical push switch 30 is arranged in the installation grooves on the box body 70;

The mechanical push switch 30 has a locked state and an unlocked state; when the mechanical push switch 30 is in a locked state, the box body 70 and the box cover 80 are locked and connected, so that the grating block 90 extends into the groove formed by the first accommodating cavity 441 and the second accommodating cavity 442;

When the mechanical push switch 30 is in the unlocked state, the box cover 80 is opened and connected from the box body 70 , so that the grating shutter 90 can be released from the first accommodating cavity 441 and the first accommodating cavity 441 . The two accommodating cavities 442 are moved out of the groove.

In this embodiment, the mechanical pressing switch 30 can be reused to lock the box 70 and realize the contact connection between the heat sink 20 and the LED mounting substrate 10 . The mechanical push switch 30 and the heat sink 20 may be elastically connected by elastic members, such as elastic sheets or springs. The mechanical push switch 30 has an operating portion that latches the radiator 20 and the tank cover 80 at predetermined positions by a pressing and squeezing operation, and releases the latched state by a subsequent second pressing operation, so that the latched state is released. The operation part is restored to the original position. When the box cover 80 is latched at a predetermined position, the grating shutter 90 extends into the groove formed by the first accommodating cavity 441 and the second accommodating cavity 442 . With this arrangement, the box cover 80 can be locked and the radiator 20 can be driven.

Referring to FIG. 5 , in one embodiment, the photoelectric detection switch 40 further includes a first pull-up resistor R1 and a second pull-up resistor R2, the first pull-up resistor R1 is connected in series between the first DC power supply VCC and the second pull-up resistor R2. Between the phototransmitters 42 , the second pull-up resistor R2 is arranged in series between the first DC power supply VCC and the photoelectric receiver 43 .

The first pull-up resistor R1 is the pull-up resistor of the phototransmitter 42, and a resistor with a resistance value not greater than 1KΩ can be selected.

The second pull-up resistor R2 is the pull-up resistor of the photoelectric receiver 43 , and a 10KΩ resistor can be optionally used to realize the pull-up of the triode collector power supply at the receiving end of the photoelectric receiver 43 .

When the grating block 90 for detection by the photoelectric detection switch 40 extends into the groove of the photoelectric detection switch 40, it can block the optical signal sent by the photoelectric transmitter 42 from being received by the photoelectric receiver 43, and the photoelectric receiver 43 is not conductive at this time. is turned on, thereby outputting an electrical signal with a high level of the pull-up power supply. When the grating block 90 does not extend into the groove of the photoelectric detection switch 40, the optical signal sent by the photoelectric transmitter 42 is received by the photoelectric receiver 43, and the photoelectric receiver 43 is turned on at this time, thereby outputting a low-level signal. electric signal.

6, in one embodiment, the power supply control module 50 includes a main controller 51 and a power supply 52, the signal feedback end of the main controller 51 is connected to the photoelectric detection switch 40, the main controller The control end of 51 is connected to the power supply 52;

The main controller 51 is configured to control the power supply 52 to supply power to the LED lamp beads to be tested when it is determined according to the detection signal output by the photoelectric detection switch 40 that the heat sink 20 moves to a preset position.

In this embodiment, the power supply 52 may include multiple output terminals or multiple output modules to output different power supplies 52 to the fan 60 and the LED lamp beads, so as to provide working voltages for the fan 60 and the LED lamp beads. The main controller 51 can be a microprocessor such as a single-chip microcomputer, a DSP, or an FPGA, and is used to determine whether the contact between the heat sink and the LED mounting substrate 10 is good according to the detection signal output by the photoelectric detection switch 40, and control the power supply when the contact is good. The power supply 52 supplies power to the fan 60 and the LED lamp beads respectively. Specifically, when receiving a high-level detection signal, the main controller 51 outputs a power-on enable signal to the power supply 52, and when receiving a low-level detection signal, it outputs a standby enable signal to The power supply 52 is used to realize the standby of the power supply 52, and the work does not work at this time. Of course, in other embodiments, the main controller 51 can also control other circuit modules in the LED light source test tool to supply power, so as to realize the LED light source test.

6 , in one embodiment, the main controller 51 is further configured to enter a test mode when it is determined according to the detection signal output by the photoelectric detection switch 40 that the radiator 20 moves to a preset position, so as to Test the LED lamp beads.

In this embodiment, when the main controller 51 determines that the contact between the heat sink and the LED mounting substrate 10 is good, the main controller 51 can enter the test mode to realize the light source test of the LED lamp beads.

In practical application, before the light source test, the fan 60 can be connected to the light control circuit board 41 of the tooling by using the fan 60 cable, and the fan 60 is electrically connected to the power supply 52 through the cable and the terminal. Install the LED light source to be tested on the test fixture, and connect it to the light control circuit board 41 using the LED cable at the same time. Check whether there are other objects in the middle of the photoelectric detection switch 40 so as not to interfere with the tool contact detection. After completing the above calibration, press the mechanical pressing switch 30, and after the heat sink 20 is in good contact with the LED mounting substrate 10, supply power to the LED lamp beads to test the LED light source to be tested. If the power supply of the LED light source is unsuccessful, it can be detected whether the heat sink 20 is in good contact with the LED mounting substrate 10 .

The present invention also provides an LED light source testing system, the LED light source testing system includes the above-mentioned LED light source testing tool. The detailed structure of the LED light source test tool can refer to the above-mentioned embodiment, and will not be repeated here; The embodiment includes all the technical solutions of all the above-mentioned embodiments of the LED light source test tool, and the technical effects achieved are also the same, which will not be repeated here.

In this embodiment, the LED lamp source test system can realize the luminous flux (Lm), light intensity (cd), spectral distribution, chromaticity (x, y), (u', v'), uniformity of the LED lamp beads to be tested. , chromatic aberration (Δu'v') spectral dominant wavelength and other optical characteristics to test, and also can test the voltage value (V) at both ends of the LED light source, the current value (I, mA) flowing through the LED lamp bead and other electrical characteristics. detection.

The above descriptions are only optional embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, any equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect Applications in other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. An LED light source testing tooling, characterized in that the LED light source testing tooling comprises: The LED mounting substrate is configured to install the LED lamp beads to be tested; a heat sink, configured to contact and dissipate heat to the LED mounting substrate when the LED lamp bead to be tested is tested; a mechanical push switch, drivingly connected to the heat sink, configured to drive the heat sink to move toward the LED mounting substrate when triggered; a photoelectric detection switch, configured to detect the moving position of the radiator, and output a corresponding detection signal; A power supply control module, electrically connected to the photoelectric detection switch, is configured to supply power to the LED lamp beads to be tested when it is determined according to the detection signal output by the photoelectric detection switch that the heat sink moves to a preset position. 2. The LED light source test fixture according to claim 1, wherein the LED light source test fixture further comprises a fan, and the fan is electrically connected to the power supply control; The power supply control module is further configured to drive the fan to work when it is determined according to the detection signal output by the photoelectric detection switch that the heat sink moves to a preset position, so as to dissipate heat to the LED mounting substrate to be tested. 3. The LED light source test fixture of claim 1, wherein the photoelectric detection switch comprises: Light control circuit board; a photoelectric transmitter and a photoelectric receiver, arranged on the light control circuit board; A photodetector, the photodetector is formed with a first accommodating cavity and a second accommodating cavity opposite to the groove in the direction away from the light control circuit board, and the phototransmitter is accommodated in the first container The photoelectric receiver is accommodated in the second accommodating cavity. 4. The LED light source test fixture of claim 3, wherein the LED light source test fixture further comprises: a box body, the upper end of the box body is open, and the photoelectric detection switch is arranged on one side wall of the box body; a box cover, arranged above the box body; The grating block is arranged on a side wall of the box cover, and the position of the grating block corresponds to the photoelectric detection switch; when the radiator moves to a preset position, the grating block extends into the into the groove formed by the first accommodating cavity and the second accommodating cavity. 5. The LED light source test fixture of claim 4, wherein the LED light source test fixture further comprises: The support part is arranged on the box body, and the photoelectric detection switch is fixedly installed on the support part. 6. The LED light source test tool according to claim 4, wherein a mounting groove is further provided on the box body and the box cover, and the mechanical push switch is arranged in the mounting groove on the box body; The mechanical push switch has a locked state and an unlatched state; when the mechanical push switch is in a locked state, the box body and the box cover are locked and connected, so that the grating block extends into all in the groove formed by the first accommodating cavity and the second accommodating cavity; When the mechanical push switch is in the unlocked state, the box cover is opened and connected from the box body, so that the grating block is formed from the first accommodating cavity and the second accommodating cavity out of the groove. 7 . The LED light source test tool according to claim 3 , wherein the photoelectric detection switch further comprises a first pull-up resistor and a second pull-up resistor, the first pull-up resistor is connected in series with the first pull-up resistor. 8 . Between the current power supply and the photoelectric transmitter, the second pull-up resistor is arranged in series between the first DC power supply and the photoelectric receiver. 8. The LED light source test fixture according to any one of claims 1 to 7, wherein the power supply control module comprises a main controller and a power supply, and the signal feedback end of the main controller is connected to the photoelectric detection a switch is connected, and the control end of the main controller is connected to the power supply; The main controller is configured to control the power supply to supply power to the LED lamp beads to be tested when it is determined according to the detection signal output by the photoelectric detection switch that the heat sink moves to a preset position. 9 . The LED light source test fixture according to claim 8 , wherein the main controller is further configured to enter the radiator when it is determined according to the detection signal output by the photoelectric detection switch that the heat sink moves to a preset position. 10 . Test mode to test the LED lamp bead to be tested. 10 . An LED light source testing system, characterized in that, the LED light source testing system comprises the LED light source testing fixture according to any one of claims 1 to 9 .

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