Method and device for determining the position of LED chip

Abstract

The present application relates to a method for determining the orientation of an LED chip, which relates to the field of LEDs, and includes: setting a light beam to project onto a vertical elevation of the LED chip, so that an image acquisition device can clearly acquire an image of the vertical elevation of the LED chip to which the light beam is projected; comparing the average grayscale value of the image of the vertical elevation acquired by the image acquisition device and / or the average grayscale value of a key area of ​​the image of the vertical elevation with a preset grayscale value range to determine the orientation of the LED chip; one of the four orientation angles of the LED chip is incomplete; two opposite vertical elevations of the LED chip are provided with pins. The present application has the effect of being able to quickly and accurately identify the orientation of an LED chip, saving process time; being able to quickly and accurately adjust the orientation of an LED chip, saving time for adjusting the orientation of an LED chip.

Description

Technical Field

[0001] The present application relates to the field of LED chips, and in particular to a method for determining the orientation of an LED chip, a device for determining the orientation of an LED chip, and a method for adjusting the orientation of an LED chip. Background Art

[0002] At present, in the process of assembling LED chips, in order to ensure the correct orientation of the LED chips, an incident light source is used to project a light beam vertically onto the upper surface of the LED chip; then a camera is set so that the angle between the incident light source and the camera is close to zero degrees; the camera obtains an image of the upper surface of the LED chip, and compares the image with the image of the upper surface of a preset standard LED chip, so as to determine whether the orientation of the LED chip is correct. This method can identify whether the orientation of the LED chip is correct to a certain extent, but there are the following problems: 1. If there is residual glue or other reflective materials on the surface of one of the four orientation angles of the LED chip, it will affect the image of the missing corner obtained by the camera, thereby causing a misjudgment of the orientation of the LED chip; 2. If there are other debris on the upper surface of the LED chip, it will also interfere with the image of the missing corner obtained by the camera, and affect the judgment of the orientation of the LED chip during the image identification process.

[0003] In addition, some manufacturers place LED chips on PCB boards or other boards with electrical interfaces, and perform electrical detection on the pins of the LED chips to determine whether the orientation of the LED chips is correct. This method has the following problems: 1. It increases the process time before the LED chips are pasted onto the target PCB board; 2. It increases the LED chip detection mechanism; 3. It increases the workstations in production; 4. Electrical detection is prone to errors, affecting the judgment of the LED chip orientation; 5. The probes are severely worn, causing poor contact; 6. The probes need to be replaced after being severely worn, resulting in increased costs and the need for equipment shutdown. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a method for determining the orientation of an LED chip, a device for determining the orientation of an LED chip, and a method for adjusting the orientation of an LED chip.

[0005] The present application provides a method for determining the position of an LED chip using the following technical solution:

[0006] In a first aspect, a method for determining the position of an LED chip is provided, comprising:

[0007] Setting the light beam to project onto the vertical elevation of the LED chip, so that the image acquisition device can clearly acquire the image of the vertical elevation of the LED chip to which the light beam is projected;

[0008] Comparing the average grayscale value of the image of the vertical facade acquired by the image acquisition device and / or the average grayscale value of the key area of ​​the image of the vertical facade with a preset grayscale value range to determine the orientation of the LED chip;

[0009] Among the four azimuth angles of the LED chip, one azimuth angle is incomplete; two opposite vertical faces of the LED chip are provided with pins;

[0010] In a second aspect, a method for determining the position of an LED chip is also provided, comprising:

[0011] Setting the light beam to project onto the vertical elevation of the LED chip, so that the image acquisition device can clearly acquire the image of the vertical elevation of the LED chip to which the light beam is projected;

[0012] Matching the image of the vertical facade acquired by the image acquisition device with a pre-acquired standard image to determine the orientation of the LED chip;

[0013] Among the four azimuth angles of the LED chip, one azimuth angle is incomplete; two opposite vertical facades of the LED chip are provided with pins;.

[0014] Preferably, the light beam forms an angle less than 90 degrees with the horizontal plane of the LED chip.

[0015] Preferably, the camera of the image acquisition device is arranged to face the vertical facade of the LED chip to which the light beam is projected.

[0016] In a third aspect, a device for determining the position of an LED chip is also provided, comprising:

[0017] A light source, used to project a light beam toward a vertical elevation of the LED chip;

[0018] An image acquisition device, used to clearly acquire an image of the vertical elevation of the LED chip to which the light beam is projected;

[0019] A comparator is used to compare the average grayscale value of the image of the vertical facade acquired by the image acquisition device and / or the average grayscale value of the key area of ​​the image of the vertical facade with a preset grayscale value range to determine the orientation of the LED chip.

[0020] In a fourth aspect, a device for determining the position of an LED chip is also provided, comprising:

[0021] A light source, used to project a light beam toward a vertical elevation of the LED chip;

[0022] An image acquisition device, used to clearly acquire an image of the vertical elevation of the LED chip to which the light beam is projected;

[0023] A matcher is used to match the image of the vertical facade acquired by the image acquisition device with a pre-acquired standard image to determine the orientation of the LED chip.

[0024] Preferably, the light beam forms an angle less than 90 degrees with the horizontal plane of the LED chip.

[0025] Preferably, the camera of the image acquisition device is arranged to face the vertical facade of the LED chip to which the light beam is projected.

[0026] In a fifth aspect, a method for adjusting the position of an LED chip is also provided, comprising:

[0027] Setting the light beam to project onto the vertical elevation of the LED chip, so that the image acquisition device can clearly acquire the image of the vertical elevation of the LED chip to which the light beam is projected;

[0028] Comparing the average grayscale value of the image of the vertical facade acquired by the image acquisition device and / or the average grayscale value of the key area of ​​the image of the vertical facade with a preset grayscale value range to determine the orientation of the LED chip;

[0029] In response to the orientation of the LED chip not meeting a preset orientation requirement, rotating the LED chip to achieve a preset orientation;

[0030] Among the four azimuth angles of the LED chip, one azimuth angle is incomplete; two opposite vertical faces of the LED chip are provided with pins;

[0031] In a sixth aspect, a method for adjusting the position of an LED chip is also provided, comprising:

[0032] Setting the light beam to project onto the vertical elevation of the LED chip, so that the image acquisition device can clearly acquire the image of the vertical elevation of the LED chip to which the light beam is projected;

[0033] Matching the image of the vertical facade acquired by the image acquisition device with a pre-acquired standard image to determine the orientation of the LED chip;

[0034] In response to the orientation of the LED chip not meeting the preset orientation requirement, the LED chip is rotated to reach the preset orientation.

[0035] Among the four azimuth angles of the LED chip, one azimuth angle is incomplete; two opposite vertical facades of the LED chip are provided with pins.

[0036] In summary, the present application includes at least one of the following beneficial technical effects:

[0037] 1. The position of LED chips can be identified quickly and accurately, saving process time;

[0038] 2. The position of the LED chip can be adjusted quickly and accurately, saving the time of adjusting the position of the LED chip;

[0039] 3. Even if there are debris on the horizontal surface of the LED chip or the broken corner of the LED chip, it will not affect the determination of the orientation of the LED chip;

[0040] 4. Since the shooting is done from the side, there is no interference with the suction nozzle located above, and the two work in parallel, which improves the overall efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a first-view perspective image of a stereoscopic image of an LED chip;

[0042] Figure 2 is a second viewing angle diagram of a stereogram of an LED chip;

[0043] Figure 3 A first embodiment of a method for determining the position of an LED chip;

[0044] Figure 4 is a first vertical elevation view of the LED chip acquired by the image acquisition device;

[0045] Figure 5 is a second vertical elevation view of the LED chip acquired by the image acquisition device;

[0046] Figure 6 is a third vertical elevation view of the LED chip acquired by the image acquisition device;

[0047] Figure 7 is a fourth vertical elevation view of the LED chip acquired by the image acquisition device;

[0048] Figure 8 A second embodiment of a method for determining the position of an LED chip;

[0049] Fig. 9 It is a device for determining the position of an LED chip;

[0050] Fig.10 It is another device for determining the position of LED chips;

[0051] Fig.11 It is a working schematic diagram of LED chip, light source and image acquisition device;

[0052] Fig.12A first embodiment of a method for adjusting the position of an LED chip;

[0053] Fig.13 The present invention is a second embodiment of a method for adjusting the position of an LED chip.

[0054] Explanation of the reference numerals: 1. LED chip; 101. pin; 2. a device for determining the position of an LED chip; 3. light source; 4. image acquisition device; 201. comparator; 5. a device for determining the position of another LED chip; 501. matcher. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-13 It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0056] In order to solve the above technical problems, the embodiments of the present application provide a method for determining the orientation of an LED chip, a device for determining the orientation of an LED chip, and a method for adjusting the orientation of an LED chip.

[0057] Currently, if Figure 1 , Figure 2 As shown, the conventional LED chip 1 is a standard hexahedron, and one of the azimuth angles is defective; one of the four azimuth angles of the LED chip 1 is defective; two opposite vertical faces of the LED chip 1 are provided with pins; the purpose of the defective azimuth angle is to distinguish the orientation of the LED chip during welding so as to correctly weld the LED chip 1. Moreover, welding pins 101 are respectively provided on the two opposite faces of the LED chip 1. At present, in the process of large-scale welding of LED chips 1 to PCB boards, the orientation of the LED chip 1 is easily incorrect, which leads to the problem that the LED chip 1 welded to the PCB board cannot work normally. Although there is also a method in the industry of placing the LED chip 1 on a board with an electrical interface for electrical testing to determine the orientation of the LED chip 1; however, this method has an additional process, which increases the production cost and is not conducive to the large-scale assembly and production of LED chips 1. In addition, another method is to obtain an image of the surface of the LED chip 1 to determine the orientation of the LED chip, which also has many problems.

[0058] The present application provides a method for determining the position of an LED chip using the following technical solution:

[0059] First, as Figure 3 As shown, a method for determining the orientation of an LED chip is provided, comprising:

[0060] S101: Set the light beam to project onto the vertical surface of the LED chip, so that the image acquisition device can clearly acquire the image of the vertical surface of the LED chip to which the light beam is projected; the light source of the light beam can be ordinary white light or light of other colors; different colors of light are used to target the different colors of the surface of the LED chip. For example, if the surface of the LED chip is black, then if the light source is white light, the image acquisition device can more clearly acquire the image of the vertical surface of the LED chip projected by the white light;

[0061] S102: Compare the average grayscale value of the image of the vertical facade acquired by the image acquisition device and / or the average grayscale value of the key area of ​​the image of the vertical facade with the preset grayscale value range to determine the orientation of the LED chip. As mentioned above, one azimuth angle of the LED chip is incomplete, and pins are respectively provided on two opposite faces. Then, when the light beam is projected onto the vertical facade of the LED chip, the light beam will produce different reflections, so that the average grayscale value of the image acquired by the image acquisition device will be different. For example, the LED chip has four vertical facades, the first vertical facade has an incomplete azimuth angle, and there are no pins on the first vertical facade; the second vertical facade has pins; the third vertical facade has neither pins nor an incomplete azimuth angle; the fourth vertical facade has both pins and an incomplete azimuth angle. That is, there are four different images of the four vertical facades of the LED chip.

[0062] In addition, the image acquisition device 4 can also acquire the average grayscale value of the key area of ​​the image of the vertical facade. The key area includes: the area of ​​the two corners of the upper edge of the vertical facade of the LED chip, and the middle area of ​​the lower edge of the vertical facade of the LED chip. Obviously, in the area of ​​the two corners of the upper edge of the vertical facade, if one of the azimuth angles is incomplete, the luminous flux of the light beam reflected back to the image acquisition device 4 will be less, resulting in a larger average grayscale value at this position. In the middle area of ​​the lower edge of the vertical facade, there may be pins or there may be no pins; in the area with pins, the luminous flux of the light beam reflected back to the image acquisition device 4 will be slightly reduced, resulting in a relatively small average grayscale value at this position. In the case of no pins and no incomplete azimuth angles, the luminous flux of the light beam returning to the image acquisition device 4 will be relatively large, resulting in a small average grayscale value in the key position area at this moment.

[0063] Similarly, the average grayscale value of the vertical elevation image acquired by the image acquisition device 4 is also different. The different situations are as follows: Figure 4As shown, when the light beam reaches both the incomplete azimuth and the vertical elevation of the pin, the light flux of the light beam returning to the image acquisition device is limited, so that the average grayscale value of the vertical elevation acquired by the image acquisition device is the first grayscale value; Figure 5 As shown, when the light beam reaches the vertical facade with an incomplete azimuth angle of the LED chip, the light beam will be reflected at the position of the incomplete azimuth angle and will not return to the image acquisition device 4. Then, the average grayscale value of the vertical facade with an incomplete azimuth angle acquired by the image acquisition device 4 is the second grayscale value; Figure 6 As shown, when the light beam reaches the vertical facade without defective azimuth but with pins, due to the difference in materials between the pins and the vertical facade and the gap between the pins, when the light beam returns to the image acquisition device 4, the luminous flux of the reflected light beam acquired by the image acquisition device 4 will be different from the above situation, so that the average gray value of the vertical facade acquired by the image acquisition device 4 is the third gray value; Figure 7 As shown, when the light beam reaches the azimuth without defects and the vertical facade without pins, the light beam returns to the image acquisition device 4 more, so that the average grayscale value of the vertical facade acquired by the image acquisition device 4 is the fourth grayscale value; obviously, the first grayscale value is greater than the second grayscale value, the second grayscale value is greater than the third grayscale value, and the third grayscale value is greater than the fourth grayscale value.

[0064] Due to the difference in the ability of the four vertical facades to reflect light beams, the images acquired by the image acquisition device 4 are different; the images of the four vertical facades are processed on a computer to obtain their respective average grayscale values, which are also different; according to the respective average grayscale values ​​of the four vertical facades being within the preset grayscale value range, it is determined which of the four vertical facades the vertical facade corresponding to the average grayscale value belongs to, so that the current orientation of the LED chip can be determined. For example, the range of the image grayscale value is set to 0~255; if the average grayscale value range of the image with incomplete azimuth and pins is 200~255, the average grayscale value range of the image with incomplete azimuth is 150~199, the average grayscale value range of the image with pins is 50~100, and the average grayscale value range of the image without pins and without incomplete azimuth is 0~50. Then, if the average grayscale value of a certain image is within the above range, the orientation of the LED chip can be determined.

[0065] Due to the environment and light beam problems at the production site, the average grayscale value may not be within the above four ranges. Then, the average grayscale value of the key area can be combined with the average grayscale value of the vertical elevation to determine the orientation of the vertical elevation of the LED chip. The subsequent LED chip orientation determination method can also be used as a supplement to confirm the orientation of the LED chip that cannot be confirmed. The following orientation determination method can also be used alone.

[0066] Second, as Figure 8 A method for determining the position of an LED chip is also provided, comprising:

[0067] S201: Set the light beam to project onto the vertical facade of the LED chip 1, so that the image acquisition device 4 can clearly acquire the image of the vertical facade of the LED chip 1 to which the light beam is projected; one azimuth angle among the four azimuth angles of the LED chip 1 is incomplete; two opposite vertical facades of the LED chip 1 are provided with pins 101; this step of the above-mentioned second aspect is the same as the method provided in the first aspect, and will not be elaborated here.

[0068] S202: Match the image of the vertical elevation acquired by the image acquisition device 4 with the pre-acquired standard image to determine the orientation of the LED chip. After acquiring the images of the four vertical elevations of the LED chip 1, a variety of image recognition methods can be used to compare with the pre-acquired images of the four vertical elevations of the standard LED chip to determine which vertical elevation of the LED chip the acquired image is. For example, a pattern recognition method can be used to identify a certain acquired image to see whether it overlaps with the pre-acquired images of the four vertical elevations of the standard LED chip.

[0069] The above-mentioned method of identifying or comparing images can be used alone or in combination with the above-mentioned average gray value comparison method, and there is no restriction on which one is used first or which one is used later. As long as the image can be quickly processed by a computer to obtain which vertical elevation the image belongs to, it will be sufficient.

[0070] Preferably, the light beam is at an angle of less than 90 degrees to the horizontal plane of the LED chip 1. The light beam is not perpendicular to the horizontal plane of the LED chip 1. If it is at an angle of 90 degrees, it is equivalent to the prior art. In this embodiment, the angle between the light beam and the horizontal plane of the LED chip 1 is less than 90 degrees, so that the light beam can be reflected after encountering a vertical facade, so that the image acquisition device 4 can acquire the required image. If the angle is larger, the image acquisition device 4 acquires less light, and accordingly, the average grayscale value will be different, or the contrast of the image will be different; if the angle is smaller, the image acquisition device 4 acquires more light, and accordingly, the average grayscale value will be different, or the contrast of the image will be different. According to the above-mentioned different average grayscale values ​​and contrasts, the processing power of the computer that processes the image can be adjusted according to the production conditions on site and the processing power of the computer.

[0071] Preferably, the camera of the image acquisition device is arranged to face the vertical elevation of the LED chip to which the light beam is projected. In this embodiment, the camera is arranged to face the vertical elevation of the LED chip to which the light beam is projected, so that the light beam reflected to the camera can be acquired to the greatest extent. If the camera is not facing the vertical elevation of the LED chip to which the light beam is projected, but is at a certain angle, it is also possible, but the average gray value and / or contrast of the image to be processed must be adjusted at the same time.

[0072] Thirdly, Fig. 9 A device 2 for determining the position of an LED chip is also provided, comprising:

[0073] A light source 3, used to project a light beam toward a vertical surface of the LED chip;

[0074] The image acquisition device 4 is used to clearly acquire an image of the vertical elevation of the LED chip to which the light beam is projected; there is a certain angle between the light source and the image acquisition device, and they are located in the same plane perpendicular to the vertical elevation of the LED chip to which the light beam is projected, so that the image acquisition device can obtain a suitable reflected light beam as much as possible to generate a suitable image for subsequent image grayscale value and / or image contrast processing.

[0075] The comparator 201 is used to compare the average grayscale value of the image of the vertical facade acquired by the image acquisition device and / or the average grayscale value of the key area of ​​the image of the vertical facade with the preset grayscale value range to determine the orientation of the LED chip. As described in the above method, the average grayscale value acquired in real time and / or the average grayscale value of the key area of ​​the image of the vertical facade are compared with the preset grayscale value range, which is obtained by computer processing. The computer processing method belongs to the prior art and will not be described in detail here.

[0076] Fourthly, Fig.10 As shown, a device 5 for determining the position of an LED chip is also provided, comprising:

[0077] A light source 3, used for projecting a light beam toward a vertical surface of the LED chip 1;

[0078] An image acquisition device 4, used to clearly acquire an image of the vertical elevation of the LED chip 1 to which the light beam is projected;

[0079] The matcher 501 is used to match the image of the vertical facade acquired by the image acquisition device 4 with the pre-acquired standard image to determine the orientation of the LED chip. In this embodiment, a matcher is used to perform matching calculations on the acquired image and the standard image in real time, which also belongs to the prior art and will not be described here. The above two computer processing methods can be used in combination or separately; the combined method is a solution to compensate for the situation where the image cannot achieve the expected result due to different production environments.

[0080] like Fig.11 As shown, the light source 3 emits an incident light beam to the LED chip 1, and the image acquisition device 4 acquires the reflected light beam reflected by the vertical surface of the LED chip 1. The image acquisition device 4 includes various optical cameras or digital cameras. As long as the reflected light beam can be acquired, it can be used for this purpose.

[0081] Preferably, the light beam forms an angle less than 90 degrees with the horizontal plane of the LED chip.

[0082] Preferably, the camera of the image acquisition device is arranged to face the vertical facade of the LED chip to which the light beam is projected.

[0083] Fifthly, Fig.12 As shown, a method for adjusting the position of an LED chip is also provided, comprising:

[0084] S301: Setting the light beam to project onto the vertical surface of the LED chip 1, so that the image acquisition device 4 can clearly acquire the image of the vertical surface of the LED chip to which the light beam is projected; one of the four azimuth angles of the LED chip 1 is incomplete; two opposite vertical surfaces of the LED chip are provided with pins;

[0085] S302: comparing the average grayscale value of the image of the vertical facade acquired by the image acquisition device 4 and / or the average grayscale value of the key area of ​​the image of the vertical facade with a preset grayscale value range to determine the orientation of the LED chip;

[0086] S303: In response to the orientation of the LED chip 1 not meeting a preset orientation requirement, rotating the LED chip 1 to achieve a preset orientation.

[0087] If the position of the LED chip obtained does not conform to the predetermined position, the position needs to be adjusted. With this method, only one identification step is needed to determine the position of the LED chip 1, and there is no need to place the LED chip 1 on the electrical test platform to test whether its position is correct. If the position of the LED chip 1 does not conform to the predetermined position, an additional step is added, that is, the LED chip 1 is sucked and extracted, and then rotated a certain angle according to the difference between the predetermined position and the real-time position, and then the LED chip 1 is put down to complete the adjustment. The entire process has only two steps to achieve the correct position of the LED chip 1 and prevent the LED chip from being incorrectly assembled on the PCB.

[0088] Sixth, such as Fig.13 As shown, a method for adjusting the position of an LED chip 1 is also provided, comprising:

[0089] S401: Setting the light beam to project onto the vertical surface of the LED chip 1, so that the image acquisition device 4 can clearly acquire the image of the vertical surface of the LED chip 1 onto which the light beam is projected; one of the four azimuth angles of the LED chip 1 is incomplete; two opposite vertical surfaces of the LED chip 1 are provided with pins;

[0090] S402: matching the image of the vertical facade acquired by the image acquisition device 4 with a pre-acquired standard image to determine the orientation of the LED chip 1;

[0091] S403: In response to the orientation of the LED chip 1 not meeting a preset orientation requirement, rotating the LED chip 1 to achieve a preset orientation.

[0092] In summary, the present application includes at least one of the following beneficial technical effects:

[0093] 1. The position of LED chips can be identified quickly and accurately, saving process time;

[0094] 2. The position of the LED chip can be adjusted quickly and accurately, saving the time of adjusting the position of the LED chip;

[0095] 3. Even if there are debris on the horizontal surface of the LED chip or the broken corner of the LED chip, it will not affect the determination of the orientation of the LED chip;

[0096] 4. Since the shooting is done from the side, there is no interference with the suction nozzle located above, and the two work in parallel, which improves the overall efficiency.

[0097] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A method for determining the position of an LED chip, characterized in that: include: A light beam is set to project onto a vertical elevation of the LED chip to be positioned, and the light beam forms an angle of less than 90 degrees with the horizontal plane of the LED chip; the LED chip has four vertical elevations, the first vertical elevation is provided with both a pin and an incomplete azimuth; the second vertical elevation has an incomplete azimuth but no pin; the third vertical elevation is provided with a pin but no incomplete azimuth; the fourth vertical elevation has neither a pin nor an incomplete azimuth; one of the four azimuths of the LED chip is incomplete; two opposite vertical elevations of the LED chip are provided with pins; The camera of the image acquisition device is arranged to face the vertical elevation of the LED chip to which the light beam is projected, so as to collect an image of the vertical elevation of the LED chip to which the light beam is projected; Obtaining the average grayscale value of the image of the vertical facade acquired by the image acquisition device and / or the average grayscale value of the key area of ​​the image of the vertical facade, and comparing the average grayscale value with the preset grayscale value range; measuring the LED chip for reference in four different orientations in advance by the image acquisition device to obtain the preset grayscale value range, specifically including: when the light beam reaches the first vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the second vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the third vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the fourth vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; the preset grayscale value range includes the average grayscale value corresponding to the first vertical facade, the average grayscale value corresponding to the second vertical facade, the average grayscale value corresponding to the third vertical facade, and the average grayscale value corresponding to the fourth vertical facade; Determining a grayscale value range that matches the average grayscale value with the preset grayscale value range; The position corresponding to the matching gray value range is used as the position of the LED chip to be positioned.

2. A device for determining the position of an LED chip, characterized in that: include: A light source, used for projecting a light beam to a vertical elevation of an LED chip to be positioned; the light beam forms an angle of less than 90 degrees with a horizontal plane of the LED chip; the LED chip has four vertical elevations, the first vertical elevation is provided with both a pin and an incomplete azimuth; the second vertical elevation has an incomplete azimuth but no pin; the third vertical elevation is provided with a pin but no incomplete azimuth; the fourth vertical elevation has neither a pin nor an incomplete azimuth; one of the four azimuths of the LED chip is incomplete; two opposite vertical elevations of the LED chip are provided with pins; An image acquisition device is facing the vertical facade of the LED chip to which the light beam is projected, and is used to collect an image of the vertical facade of the LED chip to which the light beam is projected; it is also used to pre-measure the LED chip for reference in four different orientations to obtain the preset grayscale value range, specifically including: when the light beam reaches the first vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the second vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the third vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the fourth vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; the preset grayscale value range includes the average grayscale value corresponding to the first vertical facade, the average grayscale value corresponding to the second vertical facade, the average grayscale value corresponding to the third vertical facade, and the average grayscale value corresponding to the fourth vertical facade; A comparator is used to compare the average grayscale value of the image of the vertical facade acquired by the image acquisition device and / or the average grayscale value of the key area of ​​the image of the vertical facade with a preset grayscale value range, determine the grayscale value range that matches the average grayscale value with the preset grayscale value range; and use the orientation corresponding to the matching grayscale value range as the orientation of the LED chip to be positioned.

3. A method for adjusting the position of an LED chip, characterized in that: include: A light beam is set to project onto a vertical elevation of the LED chip to be positioned, and the light beam forms an angle of less than 90 degrees with the horizontal plane of the LED chip; the LED chip has four vertical elevations, the first vertical elevation is provided with both a pin and an incomplete azimuth; the second vertical elevation has an incomplete azimuth but no pin; the third vertical elevation is provided with a pin but no incomplete azimuth; the fourth vertical elevation has neither a pin nor an incomplete azimuth; one of the four azimuths of the LED chip is incomplete; two opposite vertical elevations of the LED chip are provided with pins; The camera of the image acquisition device is arranged to face the vertical elevation of the LED chip to which the light beam is projected so as to collect an image of the vertical elevation of the LED chip to which the light beam is projected; Obtaining the average grayscale value of the image of the vertical facade acquired by the image acquisition device and / or the average grayscale value of the key area of ​​the image of the vertical facade, and comparing the average grayscale value with the preset grayscale value range; measuring the LED chip for reference in four different orientations in advance by the image acquisition device to obtain the preset grayscale value range, specifically including: when the light beam reaches the first vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the second vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the third vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; when the light beam reaches the fourth vertical facade, the image acquisition device acquires the average grayscale value of the image of the vertical facade; the preset grayscale value range includes the average grayscale value corresponding to the first vertical facade, the average grayscale value corresponding to the second vertical facade, the average grayscale value corresponding to the third vertical facade, and the average grayscale value corresponding to the fourth vertical facade; Determining a grayscale value range that matches the average grayscale value with the preset grayscale value range; The position corresponding to the matching gray value range is used as the position of the LED chip to be positioned; In response to the orientation of the LED chip to be positioned not meeting a preset orientation requirement, the LED chip to be positioned is rotated to achieve the preset orientation.

Images