CN112665825A - Detection device - Google Patents
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- CN112665825A CN112665825A CN201910979512.XA CN201910979512A CN112665825A CN 112665825 A CN112665825 A CN 112665825A CN 201910979512 A CN201910979512 A CN 201910979512A CN 112665825 A CN112665825 A CN 112665825A
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- 230000003287 optical effect Effects 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims 1
- 238000001228 spectrum Methods 0.000 abstract description 21
- 230000000007 visual effect Effects 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 description 31
- 229910052594 sapphire Inorganic materials 0.000 description 28
- 239000010980 sapphire Substances 0.000 description 28
- 230000000903 blocking effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000011161 development Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013522 software testing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The present invention provides a detection device, comprising: the power supply assembly comprises a power supply head, and the power supply head is used for being electrically connected with the light-emitting diode to be detected so as to enable the light-emitting diode to be detected to emit light; the light guide assembly is used for transmitting light rays emitted by the light emitting diode to be detected to the light detection assembly; the light detection assembly receives light to form a spectrum, whether the LED to be detected works normally after being electrified can be judged through the spectrum, and the detection is visual and accurate.
Description
Technical Field
The invention relates to the technical field of display equipment detection, in particular to a detection device.
Background
With the development of display device technology, micro led display devices are increasingly used with higher brightness and longer service life. In general, a plurality of micro light emitting diodes are grown in an array on a sapphire substrate, and then the micro light emitting diodes are mounted on the substrate to form a micro light emitting diode display device.
In the related art, after each micro light emitting diode is grown on a sapphire substrate, the micro light emitting diode needs to be detected by a detection device; however, the conventional micro led detection device has various defects, such as failure to know whether the micro led can operate normally.
Disclosure of Invention
In view of this, an embodiment of the present invention provides a detection apparatus to solve the technical problem that it is impossible to know whether a micro led can operate normally.
An embodiment of the present invention provides a detection apparatus, including: the light detection device comprises a power supply assembly, a light detection assembly and a light guide assembly, wherein the power supply assembly comprises a power supply head, and the power supply head is used for being electrically connected with a light emitting diode to be detected so as to enable the light emitting diode to be detected to emit light; the light guide assembly is used for conducting light rays emitted by the light emitting diode to be detected to the light detection assembly.
The detection device as described above, wherein the power supply assembly includes an electrical detection device connected to the power supply header, and the electrical detection device is configured to detect a current and/or a voltage of the light emitting diode to be detected. The current and/or the voltage of the light emitting diode to be detected can be detected through the electric detection equipment, and whether the light emitting diode to be detected works normally or not is further judged according to the current and/or the voltage, so that the detection precision is improved.
The detection device as described above, wherein the power supply head includes a first probe and a second probe, the first probe is configured to be electrically connected to one electrode of the light emitting diode to be detected, and the second probe is configured to be electrically connected to the other electrode of the light emitting diode to be detected. Because the electrode on the light-emitting diode to be detected is smaller, the first probe is contacted with one electrode, and the second probe is contacted with the other electrode, so that the contact area with the electrode on the light-emitting diode to be detected can be reduced, and the damage to the electrode of the light-emitting diode to be detected in the detection process is avoided; in addition, the blocking of light to the light incident end can be avoided.
The detection device as described above, wherein the power supply head is plural, and each power supply head is used for being electrically connected to one light emitting diode to be detected. The LED detection device can simultaneously drive a plurality of LEDs to be detected to emit light, simultaneously detect a plurality of LEDs to be detected, and improve the detection rate.
The detection apparatus as described above, wherein the light guide assembly comprises an optical fiber. The loss of light conducted in the light guide assembly can be reduced; in addition, the optical fiber has better flexibility and can be bent.
The detection device further comprises a light source and an image acquisition device, wherein light emitted by the light source irradiates on the light emitting diode to be detected; the image acquisition device is used for acquiring light rays reflected by the light emitting diode to be detected. The images of the plurality of light emitting diodes to be detected on the sapphire substrate can be obtained, and then the epitaxial growth condition and appearance of the light emitting diodes to be detected are judged according to the images.
The detection device as described above, wherein the detection device further includes a lens assembly located between the image capture device and the led to be detected, and the lens assembly is configured to converge light onto the image capture device. The light is received by the image acquisition device after being converged, so that the definition of the image acquisition device for acquiring the image can be improved.
The detection apparatus as above, wherein the lens assembly includes a first lens assembly and a second lens assembly arranged at intervals, each of the first lens assembly and the second lens assembly includes at least one convex lens, the main optical axes of the first lens assembly and the second lens assembly are arranged in a collinear manner, and the second lens assembly is located between the first lens assembly and the image acquisition apparatus. The convergence effect of the light rays reflected by the light emitting diode to be detected is improved, in addition, the image of the light emitting diode to be detected can be amplified, and the amplified image is received by the image acquisition device so as to be convenient for analyzing the image.
The detection device as described above, wherein the light source is annular, and the light source is enclosed outside the first lens assembly. The light source can be prevented from blocking the light reflected by the light emitting diode to be detected from entering the first convex lens on the basis that the light emitted by the light source vertically irradiates the light emitting diode to be detected.
The detection device as described above, wherein the light guide assembly includes a light inlet end and a light outlet end, the light inlet end is disposed toward the light emitting diode to be detected, the light outlet end is connected to the light detection assembly, and the light inlet end is disposed on the light source. The light inlet end of the light guide assembly is arranged on the outer side wall of the light source, so that the structure of the detection device is more compact.
According to the detection device provided by the embodiment of the invention, the power supply head is electrically connected with the light emitting diode so as to enable the light emitting diode to emit light, the light guide assembly conducts light emitted by the light emitting diode to be detected to the light detection assembly, the light detection assembly receives the light to form a spectrum, whether the light emitting diode works normally after being electrified can be judged through the spectrum, and the detection is visual and accurate. Through the combination of power supply assembly, light detection subassembly and leaded light subassembly, this detection device can compatible spectrum, luminance homogeneity detect, has improved efficiency of software testing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a detection apparatus provided in this embodiment;
fig. 2 is a schematic diagram of a light emitting diode to be detected on a sapphire substrate detected by the detection device provided in this embodiment.
Description of reference numerals:
10: a sapphire substrate;
20: a light guide assembly;
30: a light detection component;
40: a light source;
50: a first lens assembly;
60: a second lens assembly;
70: an image acquisition device;
101: a light emitting diode to be detected;
102: a collection zone;
103: and (5) lighting the area.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventor finds that the existing detection device comprises a light source, an image sensor arranged on the upper portion of a sapphire substrate, and a convex lens located between the image sensor and the sapphire substrate, light emitted by the light source irradiates on micro light-emitting diodes during detection, the light forms reflected light on each micro light-emitting diode, the reflected light is converged on the image sensor after passing through the convex lens, and then the image sensor acquires images of each micro light-emitting diode so as to realize detection of the micro light-emitting diodes.
However, the image sensor detects the reflected light of the micro light emitting diode, and it is impossible to know whether the micro light emitting diode can normally operate.
Therefore, the detection device provided by the invention can effectively solve the problems of the existing micro light-emitting diode detection device and can improve the detection efficiency.
Fig. 1 is a schematic structural diagram of a detection apparatus provided in this embodiment; fig. 2 is a schematic diagram of a light emitting diode to be detected on a sapphire substrate detected by the detection device provided in this embodiment.
Referring to fig. 1 and fig. 2, the present embodiment provides a detection apparatus, including: the light detection device comprises a power supply assembly, a light detection assembly 30 and a light guide assembly 20, wherein the power supply assembly comprises a power supply head which is used for being electrically connected with a light emitting diode 101 to be detected so as to enable the light emitting diode 101 to be detected to emit light; the light guide assembly 20 is used for guiding the light emitted from the light emitting diode 101 to be detected to the light detection assembly 30.
Preferably, the light guide assembly 20 includes a light input end disposed toward the light emitting diode 101 to be detected, and a light output end connected to the light detection assembly 30, and light is input from the light input end and output from the light output end.
The detection device provided by the embodiment can be used for detecting a micro light-emitting diode display device, and in an exemplary manufacturing process of the micro light-emitting diodes, a plurality of micro light-emitting diodes are formed on a sapphire substrate 10 and distributed in an array shape; then, detecting each micro light-emitting diode through a detection device to ensure that the micro light-emitting diodes on the sapphire substrate 10 can work normally; after that, the micro leds on the sapphire substrate 10 are transferred to a substrate of a micro led display device, and the substrate has a driving circuit electrically connected to the micro leds, so as to control the micro leds to emit light through the driving circuit.
In this embodiment, the detection in the manufacturing process of the micro light emitting diode is taken as an example for description, but the detection device provided in this embodiment is not limited thereto, and the detection device provided in this embodiment may also be used for detecting other display devices.
In this embodiment, each light emitting diode 101 to be detected on the sapphire substrate 10 has two electrodes arranged at intervals, and the power supply head is electrically connected with the two electrodes; specifically, the power supply assembly can further include an insulating block, the power supply head includes a first contact piece and a second contact piece which are arranged on the insulating block at intervals, during detection, the insulating block is attached to the light emitting diode 101 to be detected, the first contact piece is made to be in contact with one electrode, the corresponding second contact piece is in contact with the other electrode, and when the first contact piece and the second contact piece are electrified, the light emitting diode 101 to be detected can be driven to emit light. To provide power to the first and second contact pads, the power assembly may further include a power source electrically connected to the first and second contact pads, wherein the power source may be a battery or other device capable of providing power to the first and second contact pads. It should be noted that, in order to prevent the insulating block from blocking light from being emitted to the light incident end of the light guide assembly 20, a projection area of the insulating block on the sapphire substrate 10 may be smaller than a projection area of the light emitting diode 101 to be detected on the sapphire substrate 10, or a light hole may be formed in the insulating block to allow light to be emitted to the light incident end of the light guide assembly 20 through the light hole, or the insulating block may be a transparent block to allow light to be emitted to the light incident end through the insulating block.
Of course, the power supply head in this embodiment may further include a first probe and a second probe, the first probe is configured to be electrically connected to one electrode of the light emitting diode 101 to be detected, and the second probe is configured to be electrically connected to the other electrode of the light emitting diode 101 to be detected. Because the electrodes on the light emitting diode 101 to be detected are small, the first probe is in contact with one electrode, and the second probe is in contact with the other electrode, so that the contact area with the electrodes on the light emitting diode 101 to be detected can be reduced, and further, the damage to the electrodes of the light emitting diode 101 to be detected in the detection process is avoided; in addition, the blocking of light to the light incident end can be avoided.
Illustratively, the first probe and the second probe are arranged on the insulating block at intervals, and the first probe and the second probe are both electrically connected with a power supply so that the power supply supplies power to the first probe and the second probe when detecting.
Further, since the plurality of light emitting diodes 101 to be detected are arranged on the sapphire substrate 10 in an array manner, in order to simultaneously detect the plurality of light emitting diodes 101 to be detected and further improve the detection rate, a plurality of power supply heads may be arranged, and each power supply head is electrically connected with one light emitting diode 101 to be detected. Correspondingly, each power supply head is arranged in an array, each power supply head is attached to one light-emitting diode 101 to be detected during detection, a first probe on each power supply head is in contact with one electrode of the light-emitting diode 101 to be detected, and a second probe on each power supply head is in contact with the other electrode of the light-emitting diode 101 to be detected; the power supply simultaneously supplies power to each power supply head so as to enable each light-emitting diode 101 to be detected, which is in contact with the power supply heads, to emit light; according to the arrangement, the plurality of light emitting diodes 101 to be detected can be driven to emit light at the same time, the plurality of light emitting diodes 101 to be detected can be detected at the same time, and the detection rate is improved.
For example, a plurality of power supply heads may be all mounted on one side surface of the insulating block, and during detection, the insulating block is only required to be moved onto the sapphire substrate 10, so that each power supply head is in contact with one light emitting diode 101 to be detected; with such an arrangement, it is convenient to move each power supply head to a position where it is attached to the light emitting diode 101 to be detected, or to move each power supply head to a position where it is separated from the light emitting diode 101 to be detected.
In this embodiment, the light guide assembly 20 is configured to transmit light emitted by the light emitting diode 101 to be detected to the light detection assembly 30, and the light detection assembly 30 generates a spectrum after receiving the light from the light guide assembly 20; the exemplary light detection assembly 30 may be a spectrometer, and the spectrometer may directly obtain a spectrum of light emitted by the light emitting diode 101 to be detected, and may also detect brightness of light emitted by the light emitting diode 101 to be detected, so as to determine whether the light emitting diode 101 to be detected is working normally. Illustratively, the spectrometer may be electrically connected to a personal computer to display a spectrum of light and a brightness value on a display of the personal computer for easy detection by an operator. Of course, the light detecting assembly 30 in this embodiment may also be other devices capable of detecting the spectrum of the light emitted by the led 101 to be detected, such as: the light detection assembly 30 may further include a plurality of image sensors, the light emitting end of the light guide assembly 20 is disposed toward each image sensor, an optical filter is disposed between each image sensor and the light emitting end, and the color of the optical filter corresponding to each image sensor is different, so that each image sensor can only receive light of one color, and the spectrum of the light can be obtained by combining the detection results of all the image sensors. In this embodiment, the light guide assembly 20 may be any device capable of conducting light emitted by the light emitting diode 101 to be detected to the light detection assembly 30, for example, the light guide assembly 20 may include a glass column, one end of the glass column facing the light emitting diode 101 to be detected is an incident end, one end of the glass column facing the light detection assembly 30 is an emergent end, light emitted by the light emitting diode 101 to be detected is injected into the glass column from the incident end, the light is conducted to the emergent end in the glass column, and is emitted from the emergent end to be received by the light detection assembly 30.
In this embodiment, the light guide assembly 20 includes an optical fiber. With such an arrangement, the loss of light conducted in the light guide assembly 20 can be reduced; in addition, the optical fiber has better flexibility and can be bent. Specifically, the end of the optical fiber facing the light emitting diode 101 to be detected is a light entrance end, and the end of the optical fiber facing the light detection assembly 30 is a light exit end.
It should be noted that the light-entering end of the light guide assembly 20 needs to face the light emitting diode 101 to be detected, which is in contact with the power supply head, so that the light emitted by the light emitting diode 101 to be detected can be emitted into the light guide assembly 20 through the light-entering end.
The using process of the detection device provided by the embodiment is as follows: the power supply head is contacted with the light emitting diode 101 to be detected on the sapphire substrate 10, at the moment, the first probe on the power supply head is contacted with one electrode of the light emitting diode 101 to be detected, the second probe on the power supply head is contacted with the other electrode of the light emitting diode 101 to be detected, the power supply supplies power to the first probe and the second probe, so that the light emitting diode 101 to be detected emits light, the light emitted by the light emitting diode 101 to be detected enters through the light inlet end of the light guide component 20 and is conducted to the light outlet end of the light guide component 20, the light in the light guide component 20 is emitted through the light outlet end and is received by the light detection component 30, and the light detection component 30 obtains a spectrum and a brightness value after receiving the light; the spectra of all the light emitting diodes 101 to be detected are sequentially acquired, and the consistency of the spectra and the brightness of the light emitting diodes 101 to be detected on the whole sapphire substrate 10 can be judged according to the spectra and the brightness values.
The detection device that this embodiment provided, the power supply head is connected with the emitting diode 101 electricity that waits to detect, so that the emitting diode 101 that waits to detect is luminous, the income light end orientation of leaded light subassembly 20 waits to detect emitting diode 101 setting, in order to receive the light that the emitting diode 101 that waits to detect sent, the play light end of leaded light subassembly 20 is connected with light detection subassembly 30, leaded light subassembly 20 will come from the light conduction of income light end to light detection device, light detection device forms the spectrum after receiving light, can judge through the spectrum whether normal work after the circular telegram of emitting diode 101 that waits to detect, it is comparatively accurate to detect.
In the detecting apparatus provided by this embodiment, the power supply assembly includes an electrical detecting device connected to the power supply head, and the electrical detecting device is used to detect the current and/or voltage of the light emitting diode 101 to be detected. With the arrangement, the current and/or the voltage of the light emitting diode 101 to be detected can be detected by the electrical detection equipment, and whether the light emitting diode 101 to be detected works normally or not is further judged according to the current and/or the voltage, so that the detection precision is improved. For example, the same current is loaded on a plurality of light emitting diodes 101 to be detected at the same time, the voltage values of the different light emitting diodes 101 to be detected are read, whether the light emitting diodes 101 to be detected work normally is determined according to the obtained voltage values, and if the voltage values are too high or too low, the light emitting diodes 101 to be detected work abnormally.
In particular, the electrical detection device may comprise a voltmeter connected in parallel to the first probe and the second probe, and/or an ammeter connected in series to the light emitting diode 101 to be detected; in this embodiment, the electrical detection device is not limited to this, and the electrical detection device may further include an oscilloscope, and may obtain the current and voltage of the light emitting diode 101 to be detected according to the waveform on the oscilloscope, and of course, the electrical detection device may further include a current detection circuit and/or a voltage detection circuit as long as the current and/or voltage of the light emitting diode 101 to be detected can be obtained.
With continued reference to fig. 1 and fig. 2, the detection apparatus provided in this embodiment further includes a light source 40 and an image acquisition device 70, wherein light emitted from the light source 40 irradiates on the light emitting diode 101 to be detected; the image capturing device 70 is used for capturing the light reflected by the led 101 to be detected. With the arrangement, images of the plurality of light emitting diodes 101 to be detected on the sapphire substrate 10 can be obtained, and then the epitaxial growth condition and the appearance of the light emitting diodes 101 to be detected are judged according to the images, and if the epitaxial growth is poor or the appearance has defects, the light emitting diodes 101 to be detected are unqualified.
Specifically, the light source 40 may be any device capable of emitting light, such as: the light source 40 may be an illumination lamp or a laser emitter, etc.; so that the light source 40 emits light when detecting, and the light irradiates the light emitting diode 101 to be detected.
The image acquisition device 70 is arranged on the upper part of the sapphire substrate 10, and the image acquisition device 70 receives the light rays reflected by the light emitting diodes 101 to be detected, so as to form images of the light emitting diodes 101 to be detected; for example, the image capturing device 70 may be an image sensor or a camera or other devices capable of capturing images.
It should be noted that, in order to avoid the light source 40 blocking the light reflected by the light emitting diode 101 to be detected from being emitted toward the image capturing device 70, the light source 40 may be disposed outside the line connecting the image capturing device 70 and the sapphire substrate 10, i.e., the light emitted from the light source 40 is emitted toward the sapphire substrate 10 obliquely.
Further, the detecting device further comprises a lens assembly located between the image capturing device 70 and the light emitting diode 101 to be detected, and the lens assembly is used for converging light rays on the image capturing device 70. With such an arrangement, the light rays are received by the image acquisition device 70 after being converged, so that the definition of the image acquired by the image acquisition device 70 can be improved.
It should be noted that the lens assembly can obtain light of the leds 101 to be detected in the collection area 102 on the sapphire substrate 10, and the number of the leds 101 to be detected in the collection area 102 is multiple, so that the image obtained by the image acquisition device 70 includes multiple leds 101 to be detected, so as to determine the epitaxial growth condition and appearance of the leds 101 to be detected on the sapphire substrate 10.
Illustratively, the lens assembly may include a convex lens, a main optical axis of the convex lens is collinear with a main optical axis of the image acquisition device 70, and light rays reflected by the light emitting diode 101 to be detected are converged by the convex lens and then are emitted to the image acquisition device 70; further, the lens component can also comprise a concave lens, and the main optical axis of the concave lens and the main optical axis of the convex lens are arranged in a collinear way; the concave lens may be disposed between the convex lens and the sapphire substrate 10.
Specifically, the lens assembly in this embodiment includes a first lens assembly 50 and a second lens assembly 60 which are arranged at intervals, each of the first lens assembly 50 and the second lens assembly 60 includes at least one convex lens, the primary optical axes of the first lens assembly 50 and the second lens assembly 60 are arranged in a collinear manner, and the second lens assembly 60 is located between the first lens assembly 50 and the image acquisition device 70. The lens assembly comprises a first lens assembly 50 and a second lens assembly 60, and the convergence effect of light rays reflected by the light emitting diode 101 to be detected is improved; in addition, the distance between the first lens assembly 50 and the second lens assembly 60 is set properly, so that the lens assembly forms a microscope, that is, the lens assembly can magnify the image of the light emitting diode 101 to be detected, and the magnified image is received by the image acquisition device 70, so as to analyze the image. The first lens assembly 50 and the second lens assembly 60 each include at least one convex lens, illustratively, the first lens assembly 50 may include a combination of at least one convex lens and at least one concave lens, or the first lens assembly 50 includes a plurality of convex lenses; similarly, the second lens assembly 60 may include a combination of at least one convex lens and at least one concave lens, or the second lens assembly 60 may include a plurality of convex lenses; to improve the imaging effect.
Further, the light source 40 is annular, and the light source 40 is disposed around the outer side of the first convex lens 50. With such an arrangement, on the basis that the light emitted by the light source 40 vertically irradiates on the light emitting diode 101 to be detected, the light source 40 is prevented from blocking the light reflected by the light emitting diode 101 to be detected from entering the first convex lens 50.
Illustratively, the light source 40 may include a lamp tube having a ring shape, and a filament is disposed inside the lamp tube, and the light source 40 may be driven to emit light by electrifying the filament when in use. Of course, the light source 40 may also include an annular lamp housing, in which the light emitting diode 101 or the bulb to be detected is disposed; furthermore, a frosted layer can be arranged on the inner wall of the annular lamp cover to scatter light, so that the light can be uniformly emitted to the light emitting diode 101 to be detected.
In this embodiment, the light-entering end of the light guide assembly 20 is disposed on the light source 40. The light inlet end of the light guide assembly 20 is disposed on the outer sidewall of the light source 40, so that the structure of the detection device is more compact.
Specifically, the light guide assembly 20 may be an optical fiber, one end of the optical fiber facing the sapphire substrate 10 is a light entrance end, the light entrance end may be connected to an outer sidewall of the annular light source 40 through an adhesive, and of course, the light entrance end may also be connected to an outer wall of the annular light source 40 through a clamping or bolt connection.
It should be noted that, in order to avoid the light emitted by the light source 40 entering the light-entering end of the light guide assembly 20, the light source 40 may emit light, and when the image of the light emitting diode 101 to be detected is detected by the image acquisition device 70, the power supply head is separated from the light emitting diode 101 to be detected, that is, the light detection assembly 30 does not detect the light; only when the light source 40 does not emit light, the power supply head is brought into contact with the light emitting diode 101 to be detected, and the spectrum of the light emitted from the light emitting diode 101 to be detected is detected by the light detection assembly 30.
In other implementations, the light input end of the light guide assembly 20 may be disposed at a position far away from the light source 40, and the light emitted from the light source 40 does not enter the light input end of the light guide assembly 20; at this time, the light source 40 emits light, and the image of the light emitting diode 101 to be detected in the acquisition region 102 is detected by the image acquisition device 70, and at the same time, the power supply head is in contact with the light emitting diode 101 to be detected in the lighting region 103, so that the light emitting diode 101 to be detected in the lighting region 103 emits light, and the light spectrum of the light emitting diode 101 to be detected in the lighting region 103 is acquired by the light detection assembly 30, thereby improving the detection efficiency.
In other implementation manners, the detection device may include at least one light guide assembly 20, that is, at least one optical fiber, and can detect a plurality of light emitting diodes 101 to be detected at the same time, so as to improve the detection efficiency.
The working process of the detection device provided by the embodiment is as follows: the light source 40 is turned on, so that light rays emitted by the light source 40 irradiate the light emitting diode 101 to be detected in the collection area 102 of the sapphire substrate 10, the light rays reflected by the light emitting diode 101 to be detected in the collection area 102 sequentially pass through the first convex lens 50 and the second convex lens 60 and are received by the image collection device 70, an image of the light emitting diode 101 to be detected in the collection area 102 is formed, and the epitaxial growth condition and appearance of the light emitting diode 101 to be detected in the collection area 102 are judged according to the image. Then, the light source 40 is turned off, the power supply head supplies the same current to at least part of the collection area 102 and the light emitting diodes 101 to be detected outside the collection area 102 (at this time, the collection area 102 is partially overlapped with the lighting area 103), the voltage value of each light emitting diode 101 to be detected is collected, meanwhile, light rays emitted by the light emitting diodes 101 to be detected in the collection area 102 sequentially pass through the first convex lens 50 and the second convex lens 60 and are received by the image collection device 70, an image of the light emitting diodes 101 to be detected in the collection area 102 is formed, and the brightness value of the light emitting diodes 101 to be detected in the collection area 102 is judged according to the image; after that, the power supply to the leds 101 to be detected in the collection area 102 is stopped, and only the leds 101 to be detected outside the collection area 102 are powered, and the light emitted by the leds 101 to be detected outside the collection area 102 enters from the light-entering end of the light guide assembly 20 and is conducted to the light-emitting end of the light guide assembly 20, and then is emitted from the light-emitting end of the light guide assembly 20 to the light detection assembly 30 to form a spectrum. The above process is repeated to inspect the light emitting diode 101 to be inspected on the entire sapphire substrate 10.
The light source 40, the lens assembly and the image acquisition device 70 form a microscopic imaging system, an image of the light emitting diode 101 to be detected is acquired through the microscopic imaging system, and whether the epitaxial growth condition and the appearance of the light emitting diode 101 to be detected are qualified or not is judged according to the image; after detecting that the epitaxial growth condition and the appearance are qualified, the power supply head drives the light emitting diode 101 to be detected to emit light, and then the light guide assembly 20 and the spectrometer are used for acquiring the spectrum of the light emitting diode 101 to be detected, so as to further judge whether the light emitting diode 101 to be detected is qualified. The detection device can acquire the appearance and spectrum of the light-emitting diode 101 to be detected and the brightness uniformity during light emission, and detect various data of the light-emitting diode 101 to be detected so as to improve the detection precision.
It should be noted that, in the above detection process, acquisition region 102 and illumination region 103 may completely coincide or partially coincide, and certainly, acquisition region 102 and illumination region 103 may not coincide, which is not limited in this embodiment.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A detection device, comprising: the light detection device comprises a power supply assembly, a light detection assembly and a light guide assembly, wherein the power supply assembly comprises a power supply head, and the power supply head is used for being electrically connected with a light emitting diode to be detected so as to enable the light emitting diode to be detected to emit light;
the light guide assembly is used for conducting light rays emitted by the light emitting diode to be detected to the light detection assembly.
2. The device according to claim 1, wherein the power supply assembly comprises an electrical detection device connected to the power supply header, the electrical detection device being configured to detect a current and/or a voltage of the light emitting diode to be detected.
3. The detecting device for detecting the rotation of a motor rotor as claimed in claim 1, wherein the power supply head comprises a first probe and a second probe, the first probe is used for being electrically connected with one electrode of the light emitting diode to be detected, and the second probe is used for being electrically connected with the other electrode of the light emitting diode to be detected.
4. The detecting device for detecting the rotation of a motor rotor according to claim 3, wherein the number of the power supply heads is multiple, and each power supply head is used for being electrically connected with one light emitting diode to be detected.
5. The detection device of claim 1, wherein the light guide assembly comprises an optical fiber.
6. The detection device according to any one of claims 1 to 5, wherein the detection device further comprises a light source and an image acquisition device, and light emitted by the light source irradiates on the light emitting diode to be detected; the image acquisition device is used for acquiring light rays reflected by the light emitting diode to be detected.
7. The inspection device of claim 6, further comprising a lens assembly positioned between the image capture device and the LED to be inspected, the lens assembly configured to focus light onto the image capture device.
8. The detecting device for detecting the rotation of a motor rotor according to the claim 7, wherein the lens assembly comprises a first lens assembly and a second lens assembly which are arranged at intervals, the first lens assembly and the second lens assembly each comprise at least one convex lens, the main optical axes of the first lens assembly and the second lens assembly are arranged in a collinear way, and the second lens assembly is positioned between the first lens assembly and the image acquisition device.
9. The detecting device for detecting the rotation of a motor rotor according to claim 8, wherein the light source is annular and surrounds the outer side of the first lens component.
10. The detecting device according to any one of claims 6 to 9, wherein the light guiding assembly includes a light inlet end and a light outlet end, the light inlet end is disposed toward the light emitting diode to be detected, the light outlet end is connected to the light detecting assembly, and the light inlet end is disposed on the light source.
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| CN201910979512.XA CN112665825A (en) | 2019-10-15 | 2019-10-15 | Detection device |
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| CN201910979512.XA CN112665825A (en) | 2019-10-15 | 2019-10-15 | Detection device |
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| CN103728544A (en) * | 2012-10-10 | 2014-04-16 | 新世纪光电股份有限公司 | Detection device |
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| US5541416A (en) * | 1993-08-06 | 1996-07-30 | Kabushiki Kaisha Toshiba | Estimation method and apparatus for semiconductor light emitting element capable of inspecting by wafer |
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Application publication date: 20210416 |