Micro LED detection device

Abstract

A Micro LED detection device disclosed by the present invention comprises a lower end portion and an upper end portion rotatably installed on the lower end portion, a positioning structure for accommodating a Micro LED is integrated on the lower end portion, a detection assembly for detecting the Micro LED is integrated on the upper end portion, and when the upper end portion is rotatably folded relative to the lower end portion, the detection assembly is fixed on the lower end portion. The positioning structure automatically adjusts a bonding pad of the Micro LED so as to be in contact with the detection assembly; a Micro LED is positioned and placed by integrating a positioning structure at the lower end part, and automatic positioning adjustment is realized when the upper end part rotates and is folded relative to the lower end part, so that a bonding pad of the Micro LED can be automatically matched with a detection assembly integrated at the upper end part to be reliably connected; in the detection process, automatic position correction can be achieved in the rotating and folding process of the upper end portion only by preliminarily placing the Micro LED, alignment adjustment can be conducted without manual intervention, and the detection efficiency can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of Micro LED detection, and in particular, to a Micro LED detection device. Background Art

[0002] Micro LED does not require liquid crystal, and the LED itself emits light, having superior performance compared to existing display screens in all aspects such as contrast ratio, response speed, color reduction rate, viewing angle, brightness, maximum resolution, and lifespan; Micro LED is applied to electronic devices such as large TVs, monitors, automotive display screens, wearable display screens, AR / VR display screens, etc., and has a wide range of applications.

[0003] The manufacturing of Micro LED is carried out on a wafer. After manufacturing, detection is performed, and then the wafer is cut, and individual panels are detected. Since the characteristics of the display elements need to be detected during the detection process for the light-emitting elements, when using a probe detection device, it is necessary to avoid the light-emitting surface and perform pad connection to achieve detection. For this reason, it is currently difficult to detect a large number of panels at one time, but instead, the panels are connected one by one for detection.

[0004] In the specific detection process, it is necessary to precisely align and connect the pads of the Micro LED with the probes, which requires a large amount of time. Therefore, a method of accelerating the rapid positioning of the pads and the probes to avoid manual intervention needs to be considered. Summary of the Invention

[0005] The purpose of the present invention is to provide a Micro LED detection device to solve the problem of automatically positioning and connecting during Micro LED detection to avoid manual intervention and improve the detection efficiency.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A Micro LED detection device includes a lower end portion and an upper end portion rotatably mounted on the lower end portion. The lower end portion is integrated with a positioning structure for accommodating Micro LED, and the upper end portion is integrated with a detection component for detecting Micro LED. When the upper end portion rotates and folds relative to the lower end portion, the positioning structure automatically adjusts the pads of the Micro LED to contact the detection component.

[0007] Preferably, the positioning structure includes a sample loading portion formed on the lower end portion, a first adjustment groove and a second adjustment groove located on one side of the sample loading portion. An initial limiting structure is installed in the first adjustment groove, and a calibration limiting structure is installed in the second adjustment groove; the initial limiting structure is used for initially positioning the pads of the Micro LED, and the calibration limiting structure is pressed by the upper end portion to adjust the pad positioning in the sample loading portion.

[0008] Preferably, the initial limiting structure includes a positioning block installed in the first adjustment groove and a first sliding block slidably installed in the positioning block. The first sliding block includes a first pushing portion extending into the sample loading portion. At least two first springs are installed on the first sliding block, and the first springs are connected in the first adjustment groove.

[0009] Preferably, the calibration limiting structure includes a second pushing block slidably installed in the second adjustment groove and a second pushing portion installed on the second pushing block. At least two connecting members connecting the second pushing portion are provided on the second pushing block, and second springs are sleeved on the connecting members; a slope structure inclined outward from the second pushing portion is provided on the second pushing block.

[0010] Preferably, the upper end portion is provided with a pressing portion and a protruding portion provided on the pressing portion. When the upper end portion rotates and folds relative to the lower end portion, the protruding portion slides along the slope structure to push the second pushing block to slide.

[0011] Preferably, the detection assembly includes a probe head provided on the upper end portion and a plurality of probes integrated on the probe head. A signal connection portion attached to the upper end portion is connected to the probe head, and the signal connection portion is used for connecting an external instrument; the distance between adjacent two probes is 10μm - 20μm.

[0012] Preferably, a window exposing the sample loading portion is formed on the upper end portion.

[0013] Preferably, limiting notches are formed on both sides of the upper end portion, and a positioning portion cooperating with the limiting notches is provided on the lower end portion; a buckling portion is provided on the upper end portion, and a locking portion cooperating with the buckling portion is provided on the lower end portion.

[0014] Preferably, the positioning structure and the detection assembly are integrated into an integral structure and installed on the lower end portion; the integral structure includes a positioning seat installed on the lower end portion and a thin film type contactor installed on the positioning seat. A buffer spring piece is provided between the thin film type contactor and the positioning seat, and detection contacts are integrated on the thin film type contactor.

[0015] Preferably, the positioning structure and the detection component are integrated into an integral structure and installed on the lower end; the integral structure is a flexible printed circuit board, and detection contacts are integrated on the flexible printed circuit board.

[0016] Advantageous effects: By integrating the positioning structure at the lower end to position and place the Micro LED, and realizing automatic positioning adjustment when the upper end rotates and folds relative to the lower end, so that the pads of the Micro LED can be automatically matched and reliably connected with the detection components integrated on the upper end. Therefore, during the detection process, only a preliminary placement of the Micro LED is required, and then automatic position correction can be achieved during the rotation and folding of the upper end, without manual intervention for alignment adjustment, which can significantly improve the detection efficiency. Description of the drawings

[0017] Figure 1 It is a schematic structural diagram of an open state of an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a folded and closed state of an embodiment of the present invention; Figure 3 It is a schematic structural diagram of the integrated structure at the lower end in an embodiment of the present invention; Figure 4 It is a schematic structural diagram of the correction and limiting structure in an embodiment of the present invention; Figure 5 It is Figure 4 the cross-sectional structural diagram of; Figure 6 It is a schematic structural diagram of the initial limiting structure in an embodiment of the present invention; Figure 7 It is Figure 6 the cross-sectional structural diagram of; Figure 8 It is a schematic structural diagram of the integrated structure at the upper end in an embodiment of the present invention; Figure 9 It is Figure 8 the partial enlarged structural diagram at A in; Figure 10 It is a schematic structural diagram of the second embodiment of the present invention; Figure 11 It is a schematic structural diagram of the integrated structure in the second embodiment of the present invention; Figure 12 It is a schematic structural diagram of the thin-film contactor in the second embodiment of the present invention; Figure 13 It is a schematic structural diagram of the third embodiment of the present invention; Figure 14 It is a schematic structural diagram of the flexible printed circuit board in the third embodiment of the present invention; InFigures 1 to 14 In it, the corresponding relationship between the component names or lines and the drawing numbers is as follows: Lower end portion 1, positioning portion 101, locking portion 102, upper end portion 2, pressing portion 201, protruding portion 202, viewing window 203, limiting notch 204, buckling portion 205, positioning structure 3, sample loading portion 31, first adjustment groove 32, second adjustment groove 33, initial limiting structure 34, positioning block 341, first sliding block 342, first pushing portion 343, first spring 344, calibration limiting structure 35, second pushing block 351, second pushing portion 352, connecting member 353, second spring 354, inclined surface structure 355, detection assembly 4, probe head 41, probe 42, signal connection portion 43, positioning seat 5, thin film type contactor 6, buffer elastic piece 7, flexible printed circuit board 8, rotating pin 9, torsion spring 10. Specific implementation manner

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] See Figures 1 - 9 As shown, in the embodiment of the present invention, a Micro LED detection device is proposed, which includes a lower end portion 1 and an upper end portion 2 rotatably mounted on the lower end portion 1. A positioning structure 3 for accommodating Micro LED is integrated on the lower end portion 1, and a detection assembly 4 for detecting Micro LED is integrated on the upper end portion 2. When the upper end portion 2 rotates and folds relative to the lower end portion 1, the positioning structure 3 automatically adjusts the pads of the Micro LED to contact the detection assembly 4; by using the rotation and folding process of the upper end portion 2 relative to the lower end portion 1, the positioning structure 3 is pushed to automatically adjust the pad position of the Micro LED to ensure reliable connection with the detection assembly 4, so that manual intervention is not required for connection during the detection process, and the detection efficiency is improved.

[0020] Among them, the positioning structure 3 is to initially position the entire Micro LED and correct the positioning of the pads at the same time to meet the positioning process when the upper end 2 rotates and folds downward towards the lower end 1; specifically, the positioning structure 3 includes a sample loading part 31 opened on the lower end 1 and a first adjustment slot 32 and a second adjustment slot 33 located on one side of the sample loading part 31. An initial limiting structure 34 is installed in the first adjustment slot 32, and a correction limiting structure 35 is installed in the second adjustment slot 33; among them, the initial limiting structure 34 is used to initially position the pads of the Micro LED, and the correction limiting structure 35 is pressed by the upper end 2 to adjust the pad positioning in the sample loading part 31; the initial limiting structure 34 is to be able to initially position the pads in the sample loading part 31 after the entire Micro LED is placed into the first adjustment slot 32, and the correction limiting structure 35 is pressed during the rotation and folding process of the upper end 2 towards the lower end 1 to further limit the pads of the Micro LED at the position of the sample loading part 31, so as to ensure the reliable connection and pressing of the pads with the detection component 4.

[0021] Among them, the initial limiting structure 34 includes a positioning block 341 installed in the first adjustment slot 32 and a first sliding block 342 slidably installed in the positioning block 341. The first sliding block 342 includes a first pushing part 343 extending into the sample loading part 31. At least two first springs 344 are installed on the first sliding block 342, and the first springs 344 are connected in the first adjustment slot 32; the first springs 344 are used to pull the first slider to slide towards the sample loading part 31 side. After the entire Micro LED is placed into the first adjustment slot 32 and positioned by the first sliding block 342, the first sliding block 342 is pushed backward to move, and after releasing the Micro LED, it is pulled by the first springs 344 to move the Micro LED, and the position of the pads is pushed towards the sample loading part 31 by the first sliding block 342 to achieve initial positioning.

[0022] Meanwhile, the calibration and limiting structure 35 includes a second pushing block 351 slidably installed in the second adjustment groove 33 and a second pushing portion 352 installed on the second pushing block 351. At least two connecting members 353 connecting the second pushing portion 352 are provided on the second pushing block 351, and a second spring 354 is sleeved on the connecting member 353. The second pushing portion 352 is connected to the second pushing block 351 through the connecting member 353 and the second spring 354, so that when the second pushing portion 352 is driven to calibrate the position of the pad, it is floatingly adjusted, avoiding the risk of damage to the pad caused by hard pushing. The second pushing block 351 is pushed during the rotation and folding of the upper end portion 2 relative to the lower end portion 1. Thus, the adjustment of the pad position is automatically realized during the rotation of the upper end portion 2. In order to realize self-pushing during the rotation, an inclined surface structure 355 inclined outward from the second pushing portion 352 is provided on the second pushing block 351. By using the inclined surface structure 355 being pushed, the second pushing block 351 slides toward the sample loading portion 31, so that the second pushing portion 352 moves floatingly toward the sample loading portion 31 to form a reliable positioning of the pad in the sample loading portion 31, realizing a reliable connection between the detection component 4 and the pad after the upper end portion 2 and the lower end portion 1 are folded.

[0023] Specifically, when the upper end portion 2 rotates and folds, it is necessary to stably push the second pushing block 351 to slide. A pressing portion 201 is provided on the upper end portion 2 and a protruding portion 202 is provided on the pressing portion 201. When the upper end portion 2 rotates and folds relative to the lower end portion 1, the protruding portion 202 slides along the inclined surface structure 355 to push the second pushing block 351 to slide. By the cooperation of the protruding portion 202 and the inclined surface structure 355, the second sliding block is pushed to move. In order to reduce the resistance, the end of the protruding portion 202 is a spherical structure, forming a point contact, having a small frictional force. And a limiting state is formed on the second pushing block 351 by the protruding portion 202. Thus, after the pad is pushed in place by the second pushing portion 352, a stop is formed, and there is no risk of relative displacement during the contact between the detection component 4 and the pad, resulting in connection failure.

[0024] The detection component 4 integrated in the upper end 2 is in reliable contact with the pad to achieve detection, and the detection component 4 includes a probe head 41 arranged on the upper end 2 and a plurality of probes 42 integrated on the probe head 41, and the probe head 41 is connected to a signal connection part 43 attached to the upper end 2, and the signal connection part 43 is used to connect an external instrument, and the spacing between two adjacent probes 42 is 10μm~20μm; since the overall positioning of the Micro LED and the precise positioning of the pad are achieved through the positioning structure 3 on the lower end 1, the matching probe head 41 follows the upper end 2 to rotate and fold and then forms a corresponding connection with the pad, and the probe 42 is connected to the corresponding contact on the pad, that is, the pre-set spacing can achieve reliable connection within the range of 10μm~20μm, and the signal connection part 43 can adopt FPCB or PCB, and after connecting with an external detection instrument, it can realize power supply and signal communication for the Micro LED, thereby achieving detection.

[0025] The Micro LED will emit light during the detection process. To facilitate visual observation, a window 203 exposing the sample loading portion 31 is provided at the upper end portion 2 , and the state of the Micro LED during the detection process can be observed through the window 203 .

[0026] In order to keep the upper end 2 and the lower end 1 in the folded state after being folded, the upper end 2 is provided with limiting notches 204 on both sides, the lower end 1 is provided with a positioning part 101 that cooperates with the limiting notches 204, and a buckle part 205 is provided on the upper end 2, and a locking part 102 that cooperates with the buckle part 205 is provided on the lower end 1; the positioning part 101 cooperates with the limiting notches 204 to achieve guidance and positioning during the folding process, and the buckle part 205 is limited by the locking part 102 to achieve a stable folding state between the upper end 2 and the lower end 1 during the detection process, avoiding the situation of loosening of the internal connection. The specific locking part 102 and the buckle part 205 can adopt conventional structures, such as elastic buckle structures.

[0027] The upper end portion 2 is rotatably connected to the lower end portion 1 via a rotating pin 9, on which a torsion spring 10 is sleeved, respectively abutting against the upper end portion 2 and the lower end portion 1. Thus, after the locking portion 102 and the snap portion 205 are unlocked, the upper end portion 2 is relatively bounced up at a certain angle under the action of the torsion spring 10, so as to facilitate rapid opening of the upper end portion 2.

[0028] Therefore, the above technical solution can realize the process of automatic positioning, position correction, and automatic matching connection of the structure of the pad on one side of the Micro LED. After the Micro LED is initially placed, it is only necessary to rotate the upper end 2 to complete the process of automatic positioning and connection detection, thereby reducing manual intervention in the intermediate process and improving detection efficiency.

[0029] Based on the above embodiments, for the structural form in which the pads are integrated on the back side of the Micro LED, as Figures 10 - 12 shown, by integrating the positioning structure 3 and the detection component 4 into an integral structure and installing it on the lower end portion 1, and the upper end portion 2 is rotated and folded to press and position the Micro LED. Specifically, the integral structure includes a positioning seat 5 installed on the lower end portion 1 and a thin-film contactor 6 installed on the positioning seat 5. A buffer spring sheet 7 is provided between the thin-film contactor 6 and the positioning seat 5, and detection contacts are integrated on the thin-film contactor 6; a MEMS thin film, or wire probes, MEMS probes, etc. are integrated on the thin-film contactor 6 to achieve a reliable conduction connection to the pads. The buffer spring sheet 7 forms a buffer protection during the process of pressing the Micro LED. Specifically, elastic materials such as PDMS (polydimethylsiloxane) or polyurethane can be used to ensure the contact reliability under the elastic buffer effect.

[0030] The specific content and method for detecting the Micro LED are all prior arts. In this embodiment, it is to quickly position and satisfy the conductive connection before detection, and the external detection instrument connected to the detection component 4 is a mature instrument for detecting the Micro LED at present.

[0031] Based on the above two embodiments, as Figures 13 - 14 shown, the positioning structure 3 and the detection component 4 can also be integrated into an integral structure and installed on the lower end portion 1, and the integral structure is independent and can be disassembled relative to the lower end portion 1. Similarly, it can also be adapted to achieve connection positioning during the rotation and folding of the upper end portion 2 towards the lower end portion 1. In this embodiment, the integral structure is a flexible printed circuit board 8, and detection contacts are integrated on the flexible printed circuit board 8.

[0032] In the present invention, unless otherwise clearly defined and limited, the terms "install", "connect", "connection", "fix" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0034] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A Micro LED detection device, characterized in that: The device comprises a lower end portion (1) and an upper end portion (2) rotatably mounted on the lower end portion (1); the lower end portion (1) is integrated with a positioning structure (3) for accommodating a Micro LED; the upper end portion (2) is integrated with a detection component (4) for detecting the Micro LED; when the upper end portion (2) is rotated and folded relative to the lower end portion (1), the positioning structure (3) automatically adjusts the solder pad of the Micro LED to contact the detection component (4).

2. A Micro LED detection device according to claim 1, characterized in that: The positioning structure (3) comprises a sample loading portion (31) opened on the lower end portion (1), and a first adjustment slot (32) and a second adjustment slot (33) located on one side of the sample loading portion (31); an initial limiting structure (34) is installed in the first adjustment slot (32), and a correction limiting structure (35) is installed in the second adjustment slot (33); The initial limiting structure (34) is used to preliminarily position the solder pad of the Micro LED, and the correction limiting structure (35) is pressed by the upper end portion (2) to adjust the positioning of the solder pad in the sample loading portion (31).

3. The Micro LED detection device according to claim 2, characterized in that: The initial limiting structure (34) comprises a positioning block (341) installed in the first adjustment groove (32) and a first sliding block (342) slidably installed in the positioning block (341), the first sliding block (342) comprises a first pushing portion (343) extending into the sample loading portion (31), and at least two first springs (344) are installed on the first sliding block (342), and the first springs (344) are connected in the first adjustment groove (32).

4. The Micro LED detection device according to claim 2, characterized in that: The correction limiting structure (35) comprises a second pushing block (351) slidably mounted in the second adjustment slot (33) and a second pushing portion (352) mounted on the second pushing block (351); the second pushing block (351) is provided with at least two connecting members (353) connected to the second pushing portion (352); and the connecting members (353) are sleeved with a second spring (354); The second pushing block (351) is provided with an inclined surface structure (355) which is inclined outwards from the second pushing portion (352).

5. The Micro LED detection device according to claim 4, characterized in that: The upper end portion (2) is provided with a pressing portion (201) and a protruding portion (202) provided on the pressing portion (201); when the upper end portion (2) is rotated and folded relative to the lower end portion (1), the protruding portion (202) slides along the inclined surface structure (355) to push the second pushing block (351) to slide.

6. A Micro LED detection device according to any one of claims 2 to 5, characterized in that: The detection assembly (4) comprises a probe head (41) disposed on the upper end portion (2) and a plurality of probes (42) integrated on the probe head (41); the probe head (41) is connected to a signal connection portion (43) attached to the upper end portion (2); the signal connection portion (43) is used to connect to an external instrument; The distance between two adjacent probes (42) is 10 μm to 20 μm.

7. The Micro LED detection device according to claim 6, characterized in that: The upper end portion (2) is provided with a window (203) for exposing the sample loading portion (31).

8. The Micro LED detection device according to claim 6, characterized in that: The upper end portion (2) is provided with limiting notches (204) located on both sides, and the lower end portion (1) is provided with a positioning portion (101) that cooperates with the limiting notches (204); The upper end portion (2) is provided with a buckle portion (205), and the lower end portion (1) is provided with a lock portion (102) that cooperates with the buckle portion (205).

9. The Micro LED detection device according to claim 1, characterized in that: The positioning structure (3) and the detection component (4) are integrated into an integral structure and are mounted on the lower end portion (1); The integrated structure comprises a positioning seat (5) mounted on the lower end portion (1) and a film-type contactor (6) mounted on the positioning seat (5), a buffer spring (7) being provided between the film-type contactor (6) and the positioning seat (5), and a detection contact being integrated on the film-type contactor (6).

10. The Micro LED detection device according to claim 1, characterized in that: The positioning structure (3) and the detection component (4) are integrated into an integral structure and are mounted on the lower end portion (1); The integrated structure is a flexible printed circuit board (8), and detection contacts are integrated on the flexible printed circuit board (8).

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