CN218729841U

CN218729841U - Mini LED screen mainboard lighting test fixture

Info

Publication number: CN218729841U
Application number: CN202222886162.2U
Authority: CN
Inventors: 马浪; 刘鹏; 靳亮亮; 高飞; 尹辉
Original assignee: Lixin Technology Kunshan Co ltd
Current assignee: Lixin Technology Kunshan Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-24
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses a test fixture is lighted to Mini LED screen mainboard, it includes the bottom plate, bears the support plate of the examination mainboard that awaits measuring, is used for the pre-compaction to await measuring apron of the peripheral profile of mainboard, is located pin fixed plate, the drive of bottom plate below the first driving piece of pin fixed plate up-and-down motion, fixed the setting are in on the pin fixed plate right the examination mainboard with a plurality of locating pins and the horizontal activity that the apron advances line location set up the Mura membrane module in bottom plate top space. The utility model discloses can close the accurate lid of apron and carry out accurate pre-compaction location to the peripheral profile of Mini LED screen mainboard on the support plate, guarantee test positioning accuracy and reduce the impaired risk of product.

Description

Mini LED screen mainboard lighting test fixture

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of the test of LED display, especially, relate to a test fixture is lighted to Mini LED screen mainboard.

[ background of the invention ]

Mini LED screen mainboard belongs to accurate product, and product thickness is below 0.4mm and whole is soft sheet structure. In the production process, the main board of the Mini LED screen needs to be subjected to a Mura test (i.e. an LED light emitting uniformity test, also called as a brightness and color difference test). The traditional LED lighting film coating test is that an operator places a main board to be tested on a support plate, then presses the peripheral outline of the main board to be tested by using a cover plate, then moves a Mura film to the position above the main board to be tested, is communicated with the main board to be tested through an electric connection jig to realize lighting, then obtains the effect of the main board to be tested after lighting above the Mura film through a camera, and judges whether the brightness and color difference uniformity is qualified or not through an internal test program. In this test mode, the assembly and positioning of the motherboard to be tested and the carrier board by an operator are difficult and inconvenient to operate; because electronic components on the main board of the Mini LED screen are very fragile, the components inside the main board are very easily damaged when an operator overlaps the cover board on the carrier board; when the Mura film is moved to the position above the mainboard to be tested, the alignment precision of the Mura film is poor, and the positions are difficult to realize unification.

Therefore, it is necessary to provide a new lighting test fixture for Mini LED screen main board to solve the above problems.

[ Utility model ] content

The utility model discloses a main aim at provides a test fixture is lighted to Mini LED screen mainboard can close the accurate lid of apron and carry out accurate pre-compaction location to the peripheral profile of Mini LED screen mainboard on the support plate, guarantee test positioning accuracy and reduce the impaired risk of product.

The utility model discloses a following technical scheme realizes above-mentioned purpose: the utility model provides a Mini LED screen mainboard lighting test fixture, its includes the bottom plate, bears the support plate of the mainboard that awaits measuring, is used for the apron of the peripheral profile of pre-compaction mainboard that awaits measuring, is located the pin fixed plate of bottom plate below, drive the first driving piece of pin fixed plate up-and-down motion, fixed the setting is right on the pin fixed plate await measuring the mainboard with a plurality of locating pins that the apron carries out the location, and the horizontal activity sets up the Mura membrane module in bottom plate top space.

Furthermore, be provided with on the bottom plate right the support plate periphery carries on a plurality of first stoppers spacing, first stopper is jointly around forming the support plate and placing the district, the support plate is placed in the district.

Furthermore, the upper surface of bottom plate is provided with the vacuum adsorption chamber and will the sealing washer including the vacuum adsorption chamber centers on corresponding to the support plate is placed the district, be provided with on the support plate with the awaiting measuring mainboard profile modeling hold the groove, the tank bottom of holding the groove be provided with the vacuum adsorption chamber intercommunication a plurality of vacuum adsorption holes.

Furthermore, the two opposite sides of the bottom plate are provided with buckle components for fastening the carrier plate.

Furthermore, the locating pin includes a plurality of first locating pins that go on the peripheral profile of examination mainboard and right a plurality of second locating pins that go on the location are lapped the position to the examination, the bottom plate with all be provided with on the support plate and supply first locating pin with the first through-hole that the second locating pin passed.

Furthermore, a second through hole for the first positioning pin to pass through, a third through hole for the second positioning pin to partially pass through, and a hollow-out opening for exposing the main body part of the mainboard to be tested are arranged on the cover plate.

Further, the second positioning pin sequentially comprises a first cylindrical section and a second cylindrical section from top to bottom, the diameter of the second cylindrical section is larger than that of the first cylindrical section and that of the third through hole, and the diameter of the first cylindrical section is smaller than that of the third through hole, so that a step supporting structure is formed on the second positioning pin.

Further, the Mura membrane assembly comprises a Mura carrier plate, a Mura membrane placed on the Mura carrier plate, and a plurality of second limiting blocks for limiting the peripheral outline of the Mura membrane; the Mura support plate is horizontally arranged on a pair of slide rails in a sliding mode, and the slide rails are fixedly arranged on the upper surfaces of the pair of supporting vertical plates.

Furthermore, the opposite two sides of the Mura carrier plate are provided with first positioning parts, and the support vertical plate is provided with a second positioning part which is matched with the first positioning parts to realize the positioning of the position of the Mura carrier plate.

Further, the Mura membrane module also comprises a second driving piece for driving the Mura carrier plate to horizontally slide.

Compared with the prior art, the utility model relates to a Mini LED screen mainboard lighting test fixture's beneficial effect lies in: a plurality of positioning pins capable of moving up and down are arranged below a bottom plate supporting a carrier plate, so that a mainboard to be tested and a cover plate placed on the carrier plate are accurately positioned, the convenience and accuracy of accurate alignment of the cover plate are improved, and the problem that electronic components on the mainboard to be tested are damaged due to frequent friction between the cover plate and the mainboard to be tested when the cover plate is manually stacked is avoided; the carrier plate is placed on the bottom plate, and quick buckling and fixing are realized through the buckle assembly on the bottom plate, so that the carrier plate is convenient to take, place and fix; the vacuum adsorption cavity is arranged on the bottom plate, the vacuum adsorption hole is arranged on the support plate in a matched mode, and the mainboard to be tested is adsorbed and fixed, so that the mainboard to be tested can be attached to the support plate more smoothly, and the reliability of a test result is improved; the Mura membrane assembly is horizontally and movably arranged in the upper space of the carrier plate, when appearance defect detection is carried out, the Mura membrane assembly moves to an avoidance position, and when Mura test is required, the Mura membrane assembly moves to a test position to complete Mura test in a matching manner; at the testing position, the first positioning piece on the Mura carrier plate is matched with the second positioning piece arranged at the testing position, so that the position of the Mura carrier plate is fixed, the position stability of the Mura film in the testing process is guaranteed, and the reliability of the testing result is guaranteed.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an exploded schematic view of a carrier plate and a cover plate according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the exploded bottom plate in the embodiment of the present invention;

fig. 4 is a schematic structural view of a second positioning pin in the embodiment of the present invention;

the figures in the drawings represent:

the lighting test fixture for the main board of the 100-Mini LED screen; 101-a mainboard to be tested;

1-a bottom plate, 11-a first limiting block, 12-a carrier plate placing area, 13-a vacuum adsorption cavity and 14-a buckle component; 2-a carrier plate, 21-a bearing groove, 22-a vacuum adsorption hole, 23-a first through hole; 3-cover plate, 31-second through hole, 32-third through hole, 33-hollow; 4-pin fixing plate; 5-a first driving member; 6-locating pin, 61-first locating pin, 62-second locating pin, 621-first cylindrical section, 622-second cylindrical section, 63-blocking locating pin; the device comprises a 7-Mura membrane assembly, a 71-Mura carrier plate, a 72-Mura membrane, a 73-second limiting block, a 74-sliding rail, a 75-supporting vertical plate, a 76-first positioning piece and a 77-second positioning piece.

[ detailed description ] embodiments

The first embodiment is as follows:

referring to fig. 1 to 4, the embodiment is a Mini LED screen motherboard lighting test fixture 100, which includes a bottom plate 1, a carrier plate 2 for carrying a motherboard 101 to be tested, a cover plate 3 for pre-pressing a peripheral profile of the motherboard 101 to be tested, a pin fixing plate 4 located below the bottom plate 1, a first driving member 5 for driving the pin fixing plate 4 to move up and down, a plurality of positioning pins 6 fixedly disposed on the pin fixing plate 4 for positioning the motherboard 101 to be tested and the cover plate 3, and a Mura 7 horizontally and movably disposed in a space above the bottom plate 1.

The bottom plate 1 is provided with a plurality of first limiting blocks 11 for accurately limiting the periphery of the carrier plate 2, the first limiting blocks 11 jointly surround and form a carrier plate placing area 12, the upper surface of the bottom plate 1 is provided with a vacuum adsorption cavity 13 corresponding to the carrier plate placing area 12, the bottom plate 1 is further provided with a sealing ring (not marked in the figure) surrounding the vacuum adsorption cavity 13, and the two opposite sides of the bottom plate 1 are provided with buckle components 14 for buckling the carrier plate 2.

The carrier plate 2 is provided with a bearing groove 21 copying with the mainboard 101 to be tested, and the bottom of the bearing groove 21 is provided with a plurality of vacuum adsorption holes 22 communicated with the vacuum adsorption cavity 13. The carrier plate 2 bears a mainboard 101 to be tested and is placed on the carrier plate placing area 12, the periphery of the carrier plate is quickly and accurately positioned through the first limiting block 11, and then the surface of the carrier plate 2 is buckled and pressed through the buckling component 14, so that the carrier plate is buckled and fixed on the bottom plate 1; the gap between the carrier plate 2 and the carrier plate placement area 12 on the base plate 1 is sealed by means of said sealing ring. Through the external vacuum apparatus in vacuum adsorption cavity 13 production negative pressure in vacuum adsorption cavity 13, then adsorb fixedly with the mainboard 101 that awaits measuring through vacuum adsorption hole 22, guarantee that the mainboard 101 that awaits measuring can be more smooth attached on support plate 2, prevent apron 3 when the mainboard 101 that awaits measuring of pre-compaction, the protruding coincide pre-compaction position precision and the test reliability of influence of the intermediate position swell of the mainboard 101 that awaits measuring.

The positioning pins 6 comprise a plurality of first positioning pins 61 for positioning the peripheral outline of the main board 101 to be tested, a plurality of second positioning pins 62 for accurately positioning the position of the cover plate 3, and a blocking positioning pin 63 for blocking the Mura membrane assembly 7 from entering the upper part of the carrier plate placing area 12. The base plate 1 and the carrier plate 2 are respectively provided with a first through hole 23 for the first positioning pin 61 and the second positioning pin 62 to pass through.

The first positioning pins 61 are uniformly distributed along the peripheral contour of the main board 101 to be tested. The cover plate 3 is provided with a second through hole 31 for the first positioning pin 61 to pass through, a third through hole 32 for the second positioning pin 62 to partially pass through, and a hollow opening 33 for exposing the main body of the mainboard 101 to be tested. The second positioning pin 62 sequentially comprises a first cylindrical section 621 and a second cylindrical section 622 from top to bottom, the diameter of the second cylindrical section 622 is larger than the diameter of the first cylindrical section 621 and the diameter of the third through hole 32, and the diameter of the first cylindrical section 621 is smaller than the diameter of the third through hole 32, so that a step supporting structure is formed on the second positioning pin 62. So that when the second positioning pin 62 is lifted upwards, the cover plate 3 is firstly seated on the second positioning pin 62 and then slowly pressed on the main plate 101 to be tested along with the descending of the second positioning pin 62, and accurate pre-pressing positioning is realized.

The Mura membrane assembly 7 comprises a Mura carrier plate 71, a Mura membrane 72 placed on the Mura carrier plate 71, and a plurality of second limiting blocks 73 for accurately limiting the peripheral outline of the Mura membrane 72. The Mura carrier plate 71 is horizontally slidably disposed on a pair of slide rails 74, and the slide rails 74 are fixedly disposed on the upper surfaces of a pair of supporting vertical plates 75. In order to improve the stability of the position of the Mura film 72 after moving above the bottom plate 1, first positioning members 76 are disposed on two opposite sides of the Mura carrier plate 71, and a second positioning member 77 cooperating with the first positioning members 76 to position the Mura carrier plate 71 is disposed on the supporting vertical plate 75. In this embodiment, a first magnetic block (not shown) is disposed on a surface of the first positioning element 76 facing the supporting vertical plate 75, and the second positioning element 77 is a second magnetic block attracted to the first magnetic block. In other embodiments, the first positioning element 76 may also be provided with an elastic supporting bead, and the second positioning element 77 is a slot engaged with the elastic supporting bead; or the first positioning member 76 may be provided with a locking groove, and the second positioning member 77 may be provided with an elastic supporting bead. One side of the Mura carrier 71 is provided with a limiting groove (not labeled) matched with the blocking positioning pin 63.

The Mura membrane module 7 further comprises a second driving member (not shown) for driving the Mura carrier plate 71 to slide horizontally. In other embodiments, manual pushing may also be employed.

During testing, the first driving part 5 drives the pin fixing plate 4 to be in a jacking state, all the positioning pins 6 are jacked upwards, then an operator places the mainboard 101 to be tested on the carrier plate 2, then places the carrier plate 2 on the carrier plate placing area 12, fastens the carrier plate 2 through the buckle assembly 14, realizes accurate positioning of the periphery of the mainboard 101 to be tested on the carrier plate 2 through jacking the first positioning pins 61, and the Mura carrier plate 71 is blocked on one side through the blocking positioning pins 63 in the jacking state; negative pressure is generated in the vacuum adsorption cavity 13, and the mainboard 101 to be tested is adsorbed through the vacuum adsorption holes 22 and is smoothly attached to the support plate 2, so that a precondition foundation is laid for the follow-up cover plate 3 to effectively pre-press the edge of the mainboard to be tested; then, the cover plate 3 is placed on the second positioning pin 62, and the step supporting structure on the second positioning pin 62 is used for accurately positioning and supporting the cover plate 3; starting the equipment, driving the pin fixing plate 4 to descend by the first driving piece 5, descending all the positioning pins 6, and enabling the cover plate 3 to fall on the support plate 2 and effectively prepressing the edge of the mainboard 101 to be tested; lighting the mainboard 101 to be tested, taking a picture of the upper part of the mainboard 101 to be tested by a testing camera, and checking whether the appearance of the mainboard 101 to be tested has defects; then the Mura carrier plate 71 with the Mura film 72 moves to the upper part of the mainboard 101 to be tested, the position is fixed through the first positioning piece 76 and the second positioning piece 77, the camera takes a picture again, and the uniformity defect of the brightness and the color difference displayed after lighting is detected.

What has been described above is merely some embodiments of the present invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. The utility model provides a Mini LED screen mainboard lighting test fixture, its includes bottom plate (1), bears support plate (2) of awaiting measuring mainboard (101), is used for apron (3) of the peripheral profile of pre-compaction awaiting measuring mainboard (101), its characterized in that: the testing device is characterized by further comprising a pin fixing plate (4) located below the bottom plate (1), a first driving piece (5) for driving the pin fixing plate (4) to move up and down, a plurality of positioning pins (6) fixedly arranged on the pin fixing plate (4) for positioning the main plate (101) to be tested and the cover plate (3), and a Mura membrane assembly (7) horizontally movably arranged in the space above the bottom plate (1).

2. The lighting test fixture for main board of Mini LED screen of claim 1, wherein: be provided with on bottom plate (1) right support plate (2) periphery carries on a plurality of first stopper (11) spacing, first stopper (11) are jointly around forming the support plate and place district (12), support plate (2) are placed the support plate is placed in district (12).

3. The lighting test fixture for main board of Mini LED screen of claim 2, wherein: the upper surface of bottom plate (1) corresponds to the support plate is placed district (12) and is provided with vacuum adsorption chamber (13) and incites somebody to action vacuum adsorption chamber (13) are around the sealing washer including, be provided with on support plate (2) with the groove (21) of holding of examination mainboard (101) profile modeling, the tank bottom of holding groove (21) be provided with a plurality of vacuum adsorption holes (22) of vacuum adsorption chamber (13) intercommunication.

4. The Mini LED screen mainboard lighting test fixture of any one of claims 1 to 3, wherein: and the two opposite sides of the bottom plate (1) are provided with buckling components (14) for buckling the carrier plate (2).

5. The lighting test fixture for main board of Mini LED screen of claim 1, wherein: the positioning pin (6) comprises a plurality of first positioning pins (61) for positioning the peripheral outline of the mainboard (101) to be tested and a plurality of second positioning pins (62) for positioning the position of the cover plate (3), and first through holes (23) for the first positioning pins (61) and the second positioning pins (62) to pass through are formed in the base plate (1) and the carrier plate (2).

6. The lighting test fixture for main board of Mini LED screen of claim 5, wherein: and the cover plate (3) is provided with a second through hole (31) for the first positioning pin (61) to pass through, a third through hole (32) for the second positioning pin (62) to partially pass through and a hollow opening (33) for exposing the main body part of the mainboard (101) to be tested.

7. The lighting test fixture for main board of Mini LED screen of claim 6, wherein: the second positioning pin (62) sequentially comprises a first cylindrical section (621) and a second cylindrical section (622) from top to bottom, the diameter of the second cylindrical section (622) is larger than the diameter of the first cylindrical section (621) and the diameter of the third through hole, and the diameter of the first cylindrical section (621) is smaller than the diameter of the third through hole, so that a step supporting structure is formed on the second positioning pin (62).

8. The lighting test fixture for main board of Mini LED screen of claim 1, wherein: the Mura membrane assembly (7) comprises a Mura carrier plate (71), a Mura membrane (72) placed on the Mura carrier plate (71), and a plurality of second limiting blocks (73) for limiting the peripheral outline of the Mura membrane (72); the Mura carrier plate (71) is horizontally arranged on a pair of slide rails (74) in a sliding mode, and the slide rails (74) are fixedly arranged on the upper surfaces of a pair of supporting vertical plates (75).

9. The Mini LED screen motherboard lighting test fixture of claim 8, wherein: first positioning pieces (76) are arranged on two opposite sides of the Mura carrier plate (71), and second positioning pieces (77) which are matched with the first positioning pieces (76) to realize the positioning of the Mura carrier plate (71) are arranged on the supporting vertical plate (75).

10. The Mini LED screen motherboard lighting test fixture of claim 8, wherein: the Mura membrane assembly (7) further comprises a driving piece for driving the Mura carrier plate (71) to horizontally slide.