Light-emitting device, light-emitting device detection method and system

Abstract

The present invention discloses a light-emitting device, a light-emitting device detection method, and a light-emitting device detection system. The substrate of the light-emitting device is provided with a reflective surface on the surface where the light-emitting chip is located, and the reflective surface is provided with textures, and the textures are light-absorbing structures; or the substrate is provided with a light-absorbing surface on the surface where the light-emitting chip is located, and the light-absorbing surface is provided with textures, and the textures are light-reflecting structures. For detection equipment, the structural design of the substrate surface of the light-emitting device will specifically generate two types of light. After being processed by the package body, the two types of light will form a relatively orderly and measurable light composition, which can be used for detection by the detection equipment, is beneficial to subsequent quality inspection, and has good implementation convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of light-emitting devices, and in particular to a light-emitting device, a light-emitting device detection method and a light-emitting device detection system. Background Art

[0002] In the current quality inspection process of light-emitting devices (such as LEDs), quality inspections are generally only carried out on their normal working conditions, appearance defects and other issues. In actual implementation, for some light-emitting devices with high requirements, in addition to conventional quality inspections, quality inspections are also required on the molding structure of their packaging bodies.

[0003] In actual implementation, the surface profile of the package is generally curved. Due to the extremely high production speed of light-emitting devices, using traditional surface inspection tools to obtain the surface profile of the package is time-consuming and affects production efficiency. Therefore, in order to quickly inspect the package structure of light-emitting devices, a new inspection method is needed. Summary of the Invention

[0004] The present invention seeks to protect a light-emitting device, a light-emitting device detection method and a system. For the detection equipment, two types of light will be generated in a targeted manner through the structural design of the substrate surface of the light-emitting device. After the two types of light are processed by the packaging body, they will form a relatively orderly and measurable light composition, which can be used for detection by the detection equipment, is beneficial to subsequent quality detection, and has good implementation convenience.

[0005] Correspondingly, the present invention further provides a light-emitting device, comprising a substrate, a light-emitting chip, and an encapsulation layer, wherein the light-emitting chip is bonded to the substrate, the encapsulation layer is encapsulated on the light-emitting chip, the encapsulation layer is a droplet structure or a hemispherical structure, the substrate is provided with a reflective surface on the surface where the light-emitting chip is provided, and the light-emitting surface is provided with textures, wherein the textures are light-absorbing structures;

[0006] Or the substrate is provided with a light absorbing surface on the surface where the light emitting chip is provided, and the light absorbing surface is provided with lines, and the lines are reflective structures.

[0007] In an optional embodiment, the pattern includes a plurality of horizontal stripes and a plurality of vertical stripes.

[0008] Accordingly, the present invention further provides a light-emitting device detection system for detecting light-emitting devices, comprising:

[0009] Point light source, used to emit stable detection light in all directions;

[0010] A conveyor belt, having a full circle trajectory and surrounding the point light source, for transporting the light-emitting device;

[0011] A visual inspection belt is provided corresponding to the endless conveyor belt and has a plurality of fixed visual inspection units. The light emitting device is provided at any position along the running track of the conveyor belt. The reflected light from the light emitting device after the detection light is irradiated on the reflective surface or the light absorbing surface falls on the visual inspection belt.

[0012] The processing module is used to receive the data stream of the reflected light received by the annular visual inspection belt, and evaluate the quality of the light-emitting device based on the data stream.

[0013] An optional implementation manner further includes:

[0014] The self-rotating part is arranged on the conveyor belt and moves along with the conveyor belt, and has a self-rotating function; the light-emitting device is arranged on the self-rotating part.

[0015] In an optional embodiment, the trajectory of the conveyor belt further includes unconnected inlets and outlets.

[0016] Accordingly, the present invention further provides a light-emitting device detection method, which is implemented based on the light-emitting device testing system, and includes:

[0017] Driving the point light source to start;

[0018] The conveyor belt is driven to start, and the light-emitting devices on the conveyor belt move along with the conveyor belt; the visual inspection belt continuously receives the reflected light and generates a data stream and sends it to the processing module; the processing module evaluates the quality of the light-emitting devices based on the data stream.

[0019] In an optional embodiment, the driving the conveyor belt to start, and the light-emitting devices on the conveyor belt moving along with the conveyor belt, includes:

[0020] The number of the light-emitting devices on the transmission belt is more than two, and different light-emitting devices are respectively located at different axial positions of the transmission belt.

[0021] In an optional embodiment, the visual detection belt continuously receives the reflected light and generates a data stream and sends it to the processing module, including:

[0022] The data stream includes unit image data formed by the reflected light received by the visual detection unit and the reception time of the unit image data.

[0023] In an optional embodiment, the processing module evaluating the quality of the light-emitting device based on the data stream includes:

[0024] confirming the activation order of the visual inspection units of the visual inspection belt according to the running track of the conveyor belt;

[0025] Determining the reception time difference between two adjacent visual inspection units according to the running speed of the conveyor belt;

[0026] In the unit image data received by the processing module, the unit image data from different visual detection units are classified into a plurality of image sets in combination with the activation order of the visual detection units and the reception time difference;

[0027] Each of the image sets includes unit image data corresponding to one light-emitting device;

[0028] The quality of the corresponding light-emitting device is evaluated based on the unit image data in each of the image sets.

[0029] In an optional embodiment, evaluating the quality of the corresponding light-emitting device based on the unit image data in each of the image sets includes:

[0030] reconstructing overall evaluation data about the light-emitting device using all unit image data in the image set, and evaluating the quality of the light-emitting device based on a comparison result between the overall evaluation data and evaluation data of corresponding original samples;

[0031] Or the quality of the light-emitting device is evaluated based on the comparison result of each unit image data in the image set and the evaluation data of the corresponding original sample.

[0032] The present invention discloses a light-emitting device, a light-emitting device detection method and a system. For the detection equipment, through the structural design of the substrate surface of the light-emitting device, two types of light, strong (bright) and weak (dark), will be generated in a targeted manner. After the two types of light are processed by the package, they will form a relatively orderly and measurable light composition, which can be used for detection by the detection equipment; it can be seen that the combination of the reflective surface (light-absorbing surface) and the texture on the substrate mainly functions to convert the light irradiating the package to obtain an additional type of light, so that after the package processes the light emitted by the light source, the light obtained has certain characteristics, thereby forming relevant data that can be observed by the detection device; through the sample statistical comparison method, data with no actual representational significance are compared, so as to screen out defective products, which has good implementation convenience and statistical convenience, and has good practical significance for high-speed quality inspection of light-emitting devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying any creative work.

[0034] Figure 1 Schematic diagram of the three-dimensional structure of the light emitting device detection system according to the second embodiment of the present invention;

[0035] Figure 2 This is a flow chart of a light emitting device detection method according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Example 1: Light-emitting device 10

[0038] Specifically, an embodiment of the present invention provides a light-emitting device 10, including a substrate, a light-emitting chip and an encapsulation layer, wherein the light-emitting chip is bonded to the substrate, the encapsulation layer is encapsulated on the light-emitting chip, the encapsulation layer is a droplet structure or a hemispherical structure, the substrate is provided with a reflective surface on the surface where the light-emitting chip is set, and the light-emitting surface is provided with a texture, and the texture is a light-absorbing structure; or the substrate is provided with a light-absorbing surface on the surface where the light-emitting chip is set, and the light-absorbing surface is provided with a texture 3, and the texture is a reflective structure.

[0039] Specifically, since the embodiment of the present invention is mainly used to detect light-emitting chips with curved surface contours, it is easier to detect planes in order to avoid light-emitting chips with polyhedron surface contours. Therefore, the embodiment of the present invention does not detect light-emitting chips with curved surface contours. Correspondingly, the structure of the packaging layer of the light-emitting chip with a curved surface contour is generally a droplet structure (the surface contour is an irregular curved surface) or a hemispherical structure (the surface contour is a regular curved surface).

[0040] The main idea of ​​the light-emitting chip detection embodiment of the present invention is to use an external light source to illuminate the package, obtain the package's processing of the light from the light source from multiple angles and generate relevant computer data. After processing the data using statistical and other mathematical methods, it is determined whether the structural molding quality of the package meets the requirements.

[0041] During the specific implementation, it was found that due to the accuracy problem of the measuring equipment, the quality inspection result obtained by directly irradiating the conventional packaging structure with a light source and according to the above method has a large error. Therefore, in order to realize the quality inspection of the light-emitting device 10 quickly and at low cost, the embodiment of the present invention makes certain adjustments to the structure of the light-emitting device 10.

[0042] Specifically, after light irradiates the package, the package will scatter, refract, and perform other light processing on the light. In order to amplify the "defects" that may exist in the package, the substrate in the embodiment of the present invention is provided with a reflective surface on the surface where the light-emitting chip is set, and the light-emitting surface is provided with texture, and the texture is a light-absorbing structure; or the substrate is provided with a light-absorbing surface on the surface where the light-emitting chip is set, and the light-absorbing surface is provided with texture, and the texture is a reflective structure.

[0043] Specifically, after the light enters the package, theoretically, some of it will reach the surface of the substrate 1. In an embodiment of the present invention, textures are provided on the surface of the substrate to process the light in a targeted manner. To the naked eye, due to the scattering effect of the package, for the application of the light-emitting device 10, a suitable texture design will not affect its actual application effect. For the detection equipment, through the structural design of the substrate surface, two types of light, strong (bright) and weak (dark), will be generated in a targeted manner. After being processed by the package, the two types of light will form a relatively orderly and measurable light composition, which can be used for detection by the detection equipment. It can be seen that the combination of the reflective surface (light-absorbing surface) and the texture on the substrate mainly converts the light irradiating the package to obtain an additional type of light, so that after the package processes the light emitted by the light source, the light obtained has certain characteristics, thereby forming relevant data that can be observed by the detection device.

[0044] Optionally, the pattern includes a plurality of horizontal stripes and a plurality of vertical stripes. This arrangement is primarily intended to improve the pattern's ability to process light in two orthogonal directions. In theoretical analysis, due to the unpredictability of the light path within the package, perception can only be achieved through statistical observation. However, testing has shown that after passing through the package, the image data generated by the horizontal and vertical stripes is more distinct. Furthermore, this embodiment provides a higher accuracy rate for detecting the structural quality of the package.

[0045] Example 2: Light-emitting device 10 detection system

[0046] Figure 1 Schematic diagram of the three-dimensional structure of the light emitting device 10 detection system of the embodiment of the present invention. With respect to the light emitting device 10 of the first embodiment, the embodiment of the present invention provides a light emitting device 10 detection system for detecting the light emitting device 10, comprising:

[0047] Point light source 11, used to emit detection light stably in all directions;

[0048] A conveyor belt 14 , which has a full circular trajectory and surrounds the point light source 11 , and is used to transport the light emitting device 10 ;

[0049] A visual inspection belt 13 is provided corresponding to the endless conveyor belt and has a plurality of fixed visual inspection units 12. The light emitting device 10 is located at any position along the running track of the conveyor belt 14. The reflected light from the light reflecting surface 2 or the light absorbing surface of the light emitting device 10 falls on the visual inspection belt 13.

[0050] The processing module is configured to receive a data stream of reflected light received by the annular visual inspection belt 13 and evaluate the quality of the light emitting device 10 based on the data stream.

[0051] Specifically, the basic arrangement positions of the components in the light emitting device 10 detection system are shown in FIG. Figure 2 As shown in the figure, specifically, the point light source 11 can be considered as a light source that emits light uniformly in all directions. In the embodiment of the present invention, only a hemispherical light-emitting range is actually used; the running trajectory of the conveyor belt 14 is set to surround the point light source 11, and the function of the conveyor belt 14 is to transport the light-emitting device 10. The movement trajectory of the light-emitting device 10 is consistent with the movement trajectory of the conveyor belt 14; in the embodiment of the present invention, the detection principle is to obtain the reflected light formed after the detection light emitted by the light source is irradiated to the package of the light-emitting device 10, and the molding quality of the package is detected by the reflected light. Accordingly, in order to cover all areas of the detection package, the most ideal approach is that the detection light can be irradiated around the package, and correspondingly, the device receiving the reflected light should also receive the corresponding reflected light. Therefore, in this embodiment of the present invention, based on uniformity considerations, the conveyor belt 14 is arranged to have a circular trajectory surrounding the point light source 11. The optimal placement of the light source is on the central axis of the trajectory. This arrangement ensures that the light-emitting device 10 receives the same illumination conditions at every position as it moves along the conveyor belt 14. Correspondingly, the placement of the visual inspection belt 13 is determined by the placement of the light source and the conveyor belt 14, ensuring that at least a portion of the reflected light from the light source, after passing through the package of the light-emitting device 10 on the conveyor belt 14, falls on the visual inspection units 12 of the visual inspection belt 13. This arrangement ensures that when the light-emitting device 10 is driven by the conveyor belt 14 along the trajectory, at any position, at least one visual inspection unit 12 on the visual inspection belt 13 will capture the reflected light from the light-emitting device 10. Furthermore, because the visual inspection units 12 on the conveyor belt 14 have fixed installation positions, statistical and other mathematical analysis methods can be used to locate package defects.

[0052] In an optional embodiment, the light emitting device 10 detection system further includes: a rotating part, which is arranged on the conveyor belt 14 and moves along with the conveyor belt 14 and has a self-rotation function; the light emitting device 10 is arranged on the rotating part.

[0053] As mentioned above, the purpose of the conveyor belt 14 having a full circle trajectory is to observe the light-emitting device 10 from multiple directions. Furthermore, the provision of the rotating member can give the light-emitting device 10 more degrees of freedom, which is conducive to improving the accuracy of detection.

[0054] In an optional embodiment, the trajectory of the conveyor belt 14 also includes unconnected entrances and exits. In practice, since the detection of the light-emitting device 10 is performed continuously and at high speed, in addition to forming a full-circle trajectory, the conveyor belt 14 also needs to be provided with entrances and exits to allow the light-emitting devices 10 to be continuously detected. In actual implementation, after the entrances and exits are provided, there will be local deviations between the trajectory of the conveyor belt 14 and the full circle. However, when a self-rotating member is provided, the movement of the self-rotating member allows the posture change of the light-emitting device 10 relative to the light source to cover a wide range of observation angles. Therefore, considering actual production, it is actually necessary to provide the conveyor belt 14 with entrances and exits to allow the light-emitting device 10 to perform continuous detection operations.

[0055] Example 3: Light-emitting device 10 detection method

[0056] Figure 2 This is a flow chart of a light emitting device testing method according to an embodiment of the present invention. Based on the first and second embodiments, the present invention further provides a light emitting device 10 testing method, which is implemented based on the light emitting device 10 testing system, including:

[0057] S101: driving the point light source 11 to start;

[0058] S102: driving the conveyor belt 14 to start, and the light-emitting devices 10 on the conveyor belt 14 move along with the conveyor belt 14;

[0059] S103: The visual detection belt 13 continuously receives the reflected light and generates a data stream and sends it to the processing module;

[0060] Specifically, referring to the light-emitting device 10 detection system of Example 2, S101 to S103 are used to start the driving system. Specifically, the start of the point light source 11 emits detection light uniformly in all directions. The start of the transmission belt 14 will drive the light-emitting device 10 to enter from the entrance and then run along the full circle trajectory and then leave from the exit. During this process, the visual detection belt 13 continues to run, and each visual detection unit 12 will obtain corresponding image / light data.

[0061] In this process, in order to increase the detection rate, a plurality of light-emitting devices 10 are generally provided on the conveyor belt 14 . Theoretically, at the same moment, a plurality of light-emitting devices 10 will exist in the full-circle track.

[0062] S104: The processing module evaluates the quality of the light-emitting device 10 based on the data stream.

[0063] Specifically, since the direction of the detection light in the package is unmeasurable, the data related to the reflected light generated by the package excited by the detection light and obtained by the visual detection unit 12 does not contain any information that can be used to evaluate the quality of the package. However, in statistics, the differences between different detection data can be used to reflect their differences.

[0064] Since the trajectory of the conveyor belt 14 is fixed, the running trajectory of the light-emitting device 10 is also fixed, and the posture of the light-emitting device 10 during operation is fixed. For different light-emitting devices 10, at the same position, the light emitted by the light source irradiates the package of the light-emitting device 10, and the resulting reflected light characteristics should be consistent or close. If there is a large difference in the characteristics of the reflected light of a certain light-emitting device 10, it means that there is a large difference between the light-emitting device 10 and other light-emitting devices 10.

[0065] Generally, the quality distribution of compliant industrial products exhibits statistical characteristics similar to a normal distribution, meaning that most products are of medium quality, while a small number have extremely poor or very bad quality. The present invention is based on this concept. Although the reflected light from the light-emitting device 10 itself does not contain interpretable information, by comparing a large number of samples, it is possible to detect abnormalities in the quality of the light-emitting product (excessively poor or excellent), thereby completing the quality assessment function.

[0066] Specifically, since the conveyor belt 14 is moving, for the same light-emitting device 10, the reflected light / image information obtained by the visual detection unit 12 has a time difference. Therefore, before performing data analysis, the data related to the light-emitting device 10 needs to be classified first.

[0067] Specifically, the processing module evaluates the quality of the light emitting device 10 based on the data stream, including:

[0068] According to the running track of the conveyor belt 14, confirm the activation order of the visual inspection units 12 of the visual inspection belt 13;

[0069] According to the running speed of the conveyor belt 14, the reception time difference between two adjacent visual inspection units 12 is determined;

[0070] In the unit image data received by the processing module, the unit image data from different visual detection units 12 are classified into a plurality of image sets in combination with the activation order of the visual detection units 12 and the reception time difference;

[0071] Each of the image sets includes unit image data corresponding to one light emitting device 10;

[0072] The quality of the corresponding light-emitting device 10 is evaluated based on the unit image data in each of the image sets.

[0073] In actual implementation, assuming that the conveyor belt 14 moves at a constant speed, it is only necessary to know the receiving time difference between the visual detection units 12 and the detection order of the visual detection units 12, and combine the time when the light-emitting device 10 enters from the entrance to confirm the correspondence between the data of each visual detection unit 12 and the light-emitting device 10.

[0074] In actual implementation, although it takes a certain amount of time for light to propagate, the speed of light is extremely fast, and since all light-emitting devices 10 have the same time deviation, the judgment method adopted in the embodiment of the present invention does not depend on individual circumstances. As long as all samples participating in the test follow the same rules (optical path delay), it can meet the actual requirements.

[0075] Specifically, for the comparison part, two comparison methods are provided in the embodiment of the present invention:

[0076] In an optional embodiment, evaluating the quality of the corresponding light-emitting device 10 based on the unit image data in each image set includes:

[0077] All unit image data in the image set are used to reconstruct overall evaluation data about the light-emitting device 10 , and the quality of the light-emitting device 10 is evaluated based on a comparison result between the overall evaluation data and evaluation data of the corresponding original sample.

[0078] Specifically, the aforementioned structural restrictions on the light-emitting device 10, whose packaging body is a water drop structure or a hemispherical structure, have a characteristic of uniform distribution along the circumferential direction (similar to isotropy). Therefore, all its data are integrated and then compared, that is, for the light-emitting device 10 only, it does not need to depend on whether the data in a specific direction is consistent with a large number of samples, that is, the overall evaluation data of the light-emitting device 10 and the consistency of a large number of sample data meet the preset conditions. In actual operation, this implementation is often used to ignore directionality, that is, the light-emitting device 10 can meet the consistency limitation conditions in one of the postures.

[0079] In addition, the quality of the light-emitting device 10 can be evaluated based on the comparison results of each unit image data in the image set with the evaluation data of the corresponding original sample. In this embodiment, the data obtained by each visual inspection unit 12 needs to be compared with a large number of original samples at the corresponding position for consistency. In this embodiment, a point-to-point approach is adopted to accurately analyze and evaluate the light processing conditions of the package lens in each direction.

[0080] In actual implementation, in an embodiment of the present invention, the image data acquired by the visual detection unit 12 actually contains light distribution information. Light has different intensities. After the light distribution information is grayscale processed, the grayscale data of each pixel can be linked to the light intensity. The positional relationship of the pixels and the grayscale data corresponding to the pixels are used to regularly form a two-dimensional grayscale matrix, or the image composed of pixels and grayscale is directly used as the object for processing. Specifically, the implementation method adopted in the embodiment of the present invention is the perceptual hashing method.

[0081] Specifically, the execution logic of the perceptual hashing method is:

[0082] Resizing: Reducing the image to a certain number of pixels (in the format of n*n). This step aims to preserve the structure while removing details, eliminate differences in size and aspect ratio, and uniformly scale the image to a certain size. This step is not required in the embodiments of the present invention.

[0083] Color simplification: Since the image in the embodiment of the present invention is a grayscale image, there is no need to implement the color simplification step.

[0084] Calculate DCT (Discrete Preselected Transform): Decompose the image into frequency clusters and trapezoidal shapes, and select 32*32 DCT transform.

[0085] Reduce DCT: Although the result of DCT is a 32*32 matrix, we only need to keep the 8*8 matrix in the upper left corner, which presents the lowest frequency in the image.

[0086] Compute Mean: Computes the mean of the DCT.

[0087] Further DCT reduction: Based on the 8x8 DCT matrix, a 64-bit hash value is set to 0 or 1. Values ​​greater than or equal to the DCT mean are set to "1", and values ​​less than the DCT mean are set to "0". This result does not reveal the true low frequencies, but only roughly indicates the relative proportion of the frequency relative to the mean. As long as the overall structure of the image remains unchanged, the hash value remains unchanged. This avoids the effects of gamma correction or color histogram adjustments.

[0088] Construct the hash value: Set 64bit to a 64-bit long integer. The order of combination is not important, as long as all images are in the same order. Convert the 32*32 DCT to a 32*32 image.

[0089] Comparative fingerprint: Compare the similarity of images using the Hamming distance. Specifically, the fingerprint is the hash value of the image (64 bits of 0s and 1s). If the value is 0, the images are highly similar; if the Hamming distance is less than 5, it means they are close; if the Hamming distance is greater than 10, it indicates completely different images.

[0090] In each comparison process, the corresponding data of the light-emitting device 10 to be tested is compared one by one with the original samples. In actual implementation, a probability threshold can be used for limitation. For example, the Hamming distance between the corresponding data of the light-emitting device 10 to be tested and the original sample is defined as qualified as 0 to 3. When the light-emitting device 10 and a certain threshold number of original samples in the original sample are all qualified, it is determined that the light-emitting device 10 is qualified in this comparison and meets the quality requirements.

[0091] In specific implementation, machine learning can also be used to evaluate quality in a more intelligent way.

[0092] In summary, the present invention provides a light-emitting device 10, a light-emitting device 10 detection method and system. For the detection equipment, through the structural design of the surface of the substrate 1 of the light-emitting device 10, two types of light, strong (bright) and weak (dark), will be generated in a targeted manner. After the two types of light are processed by the package, they will form a relatively orderly and measurable light composition, which can be used for detection by the detection equipment; it can be seen that the combination of the reflective surface 2 (light-absorbing surface) and the texture 3 on the substrate 1 mainly functions to convert the light irradiating the package to obtain an additional type of light, so that after the package processes the light emitted by the light source, the light obtained has certain characteristics, thereby forming relevant data that can be observed by the detection device; the data with no actual representational significance is compared by sample statistical comparison, so as to screen out defective products, which has good implementation convenience and statistical convenience, and has good practical significance for high-speed quality inspection of the light-emitting device 10.

[0093] The above is a detailed introduction to a light-emitting device, a light-emitting device detection method and a system provided in the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for general technical personnel in this field, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A light emitting device detection system, characterized in that: Used for testing light-emitting devices, the light-emitting devices include a substrate, a light-emitting chip and an encapsulation layer, the light-emitting chip is bonded to the substrate, the encapsulation layer is encapsulated on the light-emitting chip, the encapsulation layer is a droplet structure or a hemispherical structure, characterized in that the substrate is provided with a reflective surface on the surface where the light-emitting chip is provided, the reflective surface is provided with textures, and the textures are light-absorbing structures; Or the substrate is provided with a light absorbing surface on the surface where the light emitting chip is provided, and the light absorbing surface is provided with textures, and the textures are reflective structures; The light emitting device detection system comprises: Point light source, used to emit stable detection light in all directions; A conveyor belt, having a full circle trajectory and surrounding the point light source, for transporting the light-emitting device; A visual inspection belt is provided corresponding to the conveyor belt and has a plurality of fixed visual inspection units. The light emitting device is provided at any position along the running track of the conveyor belt. The reflected light from the light emitting device after the detection light is irradiated on the reflective surface or the light absorbing surface falls on the visual inspection belt. The processing module is used to receive the data stream of the reflected light received by the annular visual detection belt, and evaluate the quality of the light-emitting device based on the data stream.

2. The light emitting device detection system according to claim 1, wherein: The lines include a plurality of horizontal stripes and a plurality of vertical stripes.

3. The light emitting device detection system according to claim 1, wherein: Also includes: A self-rotating member, which is arranged on the conveyor belt and moves along with the conveyor belt and has a self-rotating function; The light emitting device is arranged on the rotating member.

4. The light emitting device detection system according to claim 1, wherein: The conveyor belt trajectory also includes disconnected inlets and outlets.

5. A method for online quality inspection of a light-emitting device, characterized in that: The light emitting device detection system according to any one of claims 1 to 4 is implemented, comprising: Driving the point light source to start; Driving the conveyor belt to start, so that the light-emitting devices on the conveyor belt move along with the conveyor belt; The visual detection belt continuously receives the reflected light and generates a data stream and sends it to the processing module; The processing module evaluates the quality of the light emitting device based on the data stream.

6. The method for online quality inspection of a light emitting device according to claim 5, wherein: The driving of the conveyor belt to start, so that the light-emitting devices on the conveyor belt follow the movement of the conveyor belt, comprises: The number of the light-emitting devices on the transmission belt is more than two, and different light-emitting devices are respectively located at different axial positions of the transmission belt.

7. The method for online quality inspection of a light emitting device according to claim 5, wherein: The visual detection belt continuously receives the reflected light and generates a data stream and sends it to the processing module, including: The data stream includes unit image data formed by the reflected light received by the visual detection unit and the reception time of the unit image data.

8. The method for online quality inspection of a light emitting device according to claim 5, wherein: The processing module evaluating the quality of the light emitting device based on the data stream includes: confirming the activation order of the visual inspection units of the visual inspection belt according to the running track of the conveyor belt; Determining the reception time difference between two adjacent visual inspection units according to the running speed of the conveyor belt; In the unit image data received by the processing module, the unit image data from different visual detection units are classified into a plurality of image sets in combination with the activation order of the visual detection units and the reception time difference; Each of the image sets includes unit image data corresponding to one light-emitting device; The quality of the corresponding light-emitting device is evaluated based on the unit image data in each of the image sets.

9. The method for online quality inspection of a light emitting device according to claim 8, wherein: Evaluating the quality of the corresponding light-emitting device based on the unit image data in each of the image sets includes: reconstructing overall evaluation data about the light-emitting device using all unit image data in the image set, and evaluating the quality of the light-emitting device based on a comparison result between the overall evaluation data and evaluation data of corresponding original samples; Or the quality of the light-emitting device is evaluated based on the comparison result of each unit image data in the image set and the evaluation data of the corresponding original sample.

Images