CN219872004U - MURA test fixture for display module - Google Patents

Abstract

The utility model provides a MURA test fixture for a display module, which comprises a base, wherein rails are symmetrically arranged on the base, a first fixed block and a second fixed block are fixed on one side of each symmetrical rail, a first sliding block and a second sliding block are arranged on each symmetrical rail in a sliding way, a mounting groove is formed in one side of each first sliding block, one side of each second sliding block, which is close to each other, is connected with a sliding rail, a first sliding column is connected onto each symmetrical sliding rail in a sliding way, a pressure component is arranged on each second fixed block, a pressure detection device is arranged on each pressure component, a second sliding column is arranged on each second sliding block, the first sliding column and the second sliding column are connected with a clamping component, the distance is adjusted along the rail direction through the matching of the rails and the two sliding blocks, and the distance is adjusted along the direction perpendicular to the rails through the matching of the sliding rails, so that the MURA test fixture is used for clamping display modules with different sizes, and the pressure applied when different MURA values are detected through the pressure detection device, and the pressure resistance MURA test capability of the display modules is quantized.

Description

MURA test fixture for display module

Technical Field

The utility model mainly relates to the technical field of display module testing, in particular to a MURA test fixture for a display module.

Background

With the development of modern technology, people's daily life relies on intelligent equipment more and more, no matter medical equipment, industrial production, household appliances etc. are widely used, simultaneously with the progress of technology, in order to make things convenient for people to use more simultaneously, improve the comfort level of using, the size of display screen is bigger and bigger, the corresponding casing that is used for fixing TFT display module assembly is bigger along with the increase of size, the risk of warpage is bigger, after TFT display module assembly is attached with the apron on the casing, deformation stress on the casing can be transmitted to TFT display module assembly, like this TFT display module assembly can appear light leakage (MURA) scheduling problem;

the MURA (moire) refers to various pollution plaques generated by uneven brightness of the display screen, and the formation cause may be that the display screen is generated in the manufacturing process, or in the process of installing the casing or the middle frame, due to certain warpage of the iron frame surface of the display module, and the levelness difference of the casing or the middle frame, the MURA of the display screen may appear in the formed terminal product. The presence of MURA makes the display screen display the image, especially when the image of large tracts of land smooth area, the display result is unusual, and picture luminance is inhomogeneous, has reduced spectator's viewing comfort level.

The existing MURA test technology generally only needs to place a display screen product on a fixed clamp, ensures that the display screen product is perpendicular to a test lens, calculates the MURA value of the display screen by utilizing a shooting grabbing picture, and generally can judge that the MURA value is qualified when the MURA value is more than 50%. The MURA level is an important index for evaluating and displaying the quality of products, so that the capability of resisting the pressure MURA of the TFT module in actual production is very important, firstly, the capability of resisting the pressure MURA of the TFT module can be intuitively detected, and secondly, enterprises can be helped to evaluate and predict the risk that deformation stress generated by the warping of the shell influences the MURA value of the TFT module to be lower than 50% in actual production, so that a detection standard is established. In actual production, the pressure cannot be quantified by manually pressing the periphery of a product by using fingers in a traditional method, the detection process is too subjective, specific data cannot be obtained, an evaluation standard cannot be formed, and effective test and evaluation are difficult to realize.

In the prior art, for example, the patent with the application number of 2020217574733 comprises a bottom plate and a panel which is arranged in parallel with the bottom plate, wherein the panel is connected with the bottom plate through a supporting plate, a mounting through groove is formed in the panel, and a bracket is detachably arranged in the mounting through groove and is used for fixing a display screen to be tested; the panel is equipped with telescopic machanism respectively in the position corresponding to each summit of support, telescopic machanism's flexible end and support summit fixed connection, telescopic machanism passes through flexible end and drives the support summit and take place the position change. The testing fixture can utilize the telescopic mechanism to drive each vertex position of the support to change, realizes simulation of an actual installation structure of a display screen terminal, and then is beneficial to exploring the assembly limit state of the display screen terminal for MURA test under different distortion states of the display screen.

In view of the foregoing, the inventor has recognized that there is a need for an adjustable display module MURA test apparatus for clamping display modules of different sizes and quantifying the stress applied during the twist state MURA test.

Disclosure of Invention

The utility model aims to provide a device capable of testing a display module MURA, which is used for testing the capability of resisting pressure MURA of a TFT module, and replacing the conventional mode of detecting whether MURA is unqualified by finger pressing, so as to solve the problems in the prior art.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a MURA test fixture for display module assembly, includes the base, the symmetry is equipped with the track on the base, the symmetry track one side is fixed with first fixed block and second fixed block respectively, the symmetry on the track sliding connection have first sliding block and second sliding block, the track is two to the recessed groove of base, the lower extreme of first sliding block and second sliding block is equipped with the slidable sliding tooth in the insertion groove, one side that first fixed block and second fixed block are close to each other is equipped with the mounting groove, one side that first sliding block and second sliding block are close to each other is equipped with the mounting groove, the symmetry can dismantle between the mounting groove and be connected with the slide rail, the slide rail is two, the symmetry on the slide rail sliding connection have first sliding column, first sliding column lower extreme is equipped with the recess with slide rail matched with, be fixed with pressure component on the second fixed block, be fixed with the second sliding column on the second sliding block, first sliding block and second sliding block are equipped with the sliding groove, first sliding block and second sliding block are mutually close to each other, and one side that the second sliding block is equipped with the second sliding block is mutually close to each other is equipped with the mounting groove, and then can be adjusted the vertical measurement value through the two sliding columns and can be adjusted the vertical measurement of the size of the visual display module assembly along the two, can the vertical measurement of the visual display module assembly, can draw a visual display device through the measurement with the two-quality display device.

Further, be fixed with the erection column on the first slip post, the clamping assembly is used for centre gripping display module assembly, including fixing the lower connecting rod on the first slip post, the connecting rod other end is equipped with down the grip block down, erection column outer wall cover is equipped with the connecting rod, it is equipped with the grip block to go up the connecting rod other end, the connecting rod is equipped with the screw hole respectively with lower connecting rod, go up the connecting rod and pass through the screw connection with lower connecting rod.

Further, the pressure component is including fixing the fixed column in second fixed block upper end, the fixed column is hollow structure, fixed column one side is equipped with the side groove, the fixed column internal rotation is connected with the lead screw, the upper end of fixed column is equipped with the connecting block, the lead screw upper end runs through the connecting block and is connected with adjust knob, both ends are connected with connecting block and fixed column bottom through the bearing respectively about the lead screw, lead screw swing joint has clamping assembly, thereby realizes the effect to display module assembly force through adjust knob adjustment clamping assembly displacement.

Further, the clamping assembly comprises a lower connecting plate and an upper connecting plate, a limiting rod is fixed on one side of the lower connecting plate, the limiting rod is connected with a threaded ring, the threaded ring is movably connected with a screw rod, the other end of the lower connecting plate is connected with a lower clamping block, the upper connecting plate is connected with an upper clamping block, threaded holes are formed in the upper connecting plate and the lower connecting plate respectively, and the upper connecting plate is connected with the lower connecting plate through screws and matched with the clamping assembly to clamp the display module.

Further, the pressure detection device is a pressure sensor arranged at the upper end of the lower clamping block connected with the lower connecting plate, and an actual pressure value is obtained through the pressure sensor.

Furthermore, the MURA test fixture for the display module assembly further comprises a frame which can be installed between the upper connecting plate and the lower connecting plate, between the upper connecting rod and the lower connecting rod, and the display module assembly is installed in the frame for testing, so that the actual installation structure of the display screen terminal can be simulated, and the display module assembly is obtained more truly.

Further, the erection column is cylindrical, go up the connecting rod be equipped with erection column complex round hole, go up the connecting rod and connect on the erection column through rotatable mode, need not to take off last connecting rod when dismantling or installing, convenient operation.

Further, the lower connecting plate is provided with a connecting column, and the upper connecting plate is rotationally connected to the lower connecting plate through the connecting column.

Further, a limiting block is arranged on one side of the lower clamping block to play a role in positioning.

Further, the contact surfaces of the upper clamping block, the lower clamping block, the limiting block and the display module are all provided with antistatic gaskets, so that the test result is prevented from being influenced by static electricity.

Compared with the prior art, the utility model has the beneficial effects that:

through clamping assembly centre gripping display module assembly, through the cooperation of track and two sliding blocks, can follow track direction adjustment distance, can follow the orbital direction adjustment distance of perpendicular to through the cooperation of slide rail and first slip post to can be used for the not unidimensional display module assembly of centre gripping, the pressure of exerting when detecting different MURA values through pressure detection device, the ability of the compressive resistance MURA of quantification display module assembly.

The utility model will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic overall structure of embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view showing the whole structure of embodiment 1 of the present utility model;

FIG. 3 is a schematic view of a pressure assembly according to embodiment 1 of the present utility model;

FIG. 4 is a schematic view of a clamping assembly according to embodiment 1 of the present utility model;

fig. 5 is a schematic view of the structure of the lower connecting plate in embodiment 1 of the present utility model;

FIG. 6 is a schematic structural diagram of embodiment 2 of the present utility model;

fig. 7 is a schematic structural diagram of embodiment 3 of the present utility model.

In the figure: 1. a base; 11. a track; 12. a first fixed block; 13. a slide rail; 14. a second fixed block; 2. a first slider; 21. a second slider; 3. a first sliding column; 31. a mounting column; 32. a second sliding column; 4. a clamping assembly; 41. a lower connecting rod; 411. a lower clamping block; 412. a limiting block; 42. an upper connecting rod; 421. an upper clamping block; 422. a gasket; 5. a pressure assembly; 51. fixing the column; 52. a side groove; 53. a connecting block; 54. an adjustment knob; 55. a screw rod; 56. a lower connecting plate; 561. a stop lever, 562, a threaded ring; 57. an upper connecting plate; 58. a connecting column; 6. and a frame.

Detailed Description

In order that the utility model may be more fully understood, a more particular description of the utility model will be rendered by reference to the appended drawings, in which several embodiments of the utility model are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs, and the terms used herein in this description of the utility model are for the purpose of describing particular embodiments only and are not intended to be limiting of the utility model, with the term "and/or" as used herein including any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1-2, a MURA test fixture for a display module comprises a base 1, wherein a rail 11 is symmetrically arranged on the base 1, a first fixing block 12 and a second fixing block 14 are respectively fixed on one side of the rail 11, a first sliding block 2 and a second sliding block 21 are connected to the rail 11 in a sliding manner, the rail 11 is provided with two grooves recessed toward the base 1, sliding teeth capable of sliding in the insertion grooves are arranged at the lower ends of the first sliding block 2 and the second sliding block 21, a mounting groove is arranged on one side, close to each other, of the first fixing block 12 and the second fixing block 14, a mounting groove is arranged on one side, close to each other, of the first sliding block 2 and the second sliding block 21, a sliding rail 13 is detachably connected between the mounting grooves, two sliding rails 13 are connected to a first sliding column 3 in a sliding manner, the lower end of the first sliding column 3 is provided with a groove matched with the sliding rail 13, the second fixed block 14 is fixedly provided with a pressure component 5, the pressure component 5 is provided with a pressure detection device, the second sliding block 21 is fixedly provided with a second sliding column 32, the first sliding column 3 and the second sliding column 32 are connected with a clamping component 4, the distance can be adjusted along the direction of the rail 11 through the matching of the rail 11 and the two sliding blocks, the distance can be adjusted along the direction vertical to the rail 11 through the matching of the sliding rail 13 and the first sliding column 3, so that the device can be used for clamping display modules with different sizes, the device is matched with test lenses to be mutually vertical, then a MURA value of a display screen is calculated by photographing a grabbing picture, the MURA value can be judged to be qualified generally over 50 percent, and the pressure applied when the pressure detection device is combined to detect different MURA values, and obtaining the pressure resistance MURA of the display module.

Referring to fig. 4, the first sliding column 3 is fixedly provided with a mounting column 31, the clamping assembly 4 is used for clamping the display module, the display module comprises a lower connecting rod 41 fixed on the first sliding column 3, the other end of the lower connecting rod 41 is provided with a lower clamping block 411, an outer wall of the mounting column 31 is sleeved with an upper connecting rod 42, the other end of the upper connecting rod 42 is provided with an upper clamping block 421, the connecting rod and the lower connecting rod 41 are respectively provided with a threaded hole, the upper connecting rod 42 and the lower connecting rod 41 are connected through screws, the first sliding column 3 is fixedly provided with the mounting column 31, the clamping assembly 4 is used for clamping the display module, the display module comprises a lower connecting rod 41 fixed on the first sliding column 3, the other end of the lower connecting rod 41 is provided with a lower clamping block 411, the outer wall of the mounting column 31 is sleeved with an upper connecting rod 42, the other end of the upper connecting rod 42 is provided with an upper clamping block 421, the connecting rod and the lower connecting rod 41 are respectively provided with threaded holes, and the upper connecting rod 42 and the lower connecting rod 41 are connected through screws.

Referring to fig. 1 and 3, the pressure assembly 5 includes a fixing column 51 fixed at an upper end of the second fixing block 14, the fixing column 51 is of a hollow structure, a side slot 52 is formed on one side of the fixing column 51, a screw rod 55 is rotatably connected to the fixing column 51, a connecting block 53 is disposed at an upper end of the fixing column 51, an adjusting knob 54 is connected to an upper end of the screw rod 55 through the connecting block 53, upper and lower ends of the screw rod 55 are respectively connected to the connecting block 53 and a bottom of the fixing column 51 through bearings, and a clamping assembly is movably connected to the screw rod 55, and a force applied to the display module is achieved by adjusting displacement of the clamping assembly through the adjusting knob 54.

Referring to fig. 1 and 5, the clamping assembly includes a lower connecting plate 56 and an upper connecting plate 57, the lower connecting plate 56 is provided with a connecting column 58, the upper connecting plate 57 is rotatably connected to the lower connecting plate 56 through the connecting column 58, a limit rod 561 is fixed on one side of the lower connecting plate 56, the limit rod 561 is connected with a threaded ring 562, the threaded ring 562 is movably connected with a screw rod 55, the other end of the lower connecting plate 56 is connected with a lower clamping block 411, one side of the lower clamping block 411 is provided with a limiting block 412 to play a role in positioning, the contact surfaces of the upper clamping block 421, the lower clamping block 411, the limiting block 412 and the display module are all provided with an antistatic gasket 422 to avoid the test result from being affected by static electricity, the pressure detection device is a pressure sensor installed at the upper end of the lower clamping block 411 connected to the lower connecting plate 56, an actual pressure value is obtained through the pressure sensor, the upper connecting plate 57 is connected with the upper clamping block 421, the upper connecting plate 57 and the lower connecting plate 56 are respectively provided with threaded holes, and the upper connecting plate 57 and the lower connecting plate 56 are connected with the clamping assembly 4 through screws to be used for clamping the display module.

The specific operation mode is as follows:

firstly, the positions of the first sliding block 2 and the second sliding block 21 are adjusted, then the position of the first sliding column 3 is adjusted to place a display module on the lower connecting plate 56 and the lower connecting rod 41, limiting is carried out through the limiting block 412, the first sliding block 2, the second sliding block 21 and the first sliding column 3 are adjusted to clamp the display module, the upper connecting plate 57 is sleeved on the mounting column 31, the upper connecting plate 57 is rotated to the position above the lower connecting plate 56, the display module is lightened through screw fixation, a power supply is connected, the screw rod 55 is driven to rotate by the rotary adjusting knob 54, the lower connecting plate 56 is driven to move downwards by the screw rod 55, accordingly downward force is applied to the display module, the test lens is perpendicular to the display module in cooperation with the test lens, then a shooting grabbing picture is calculated to obtain the MURA value of the display screen, and meanwhile, the pressure value is recorded through the pressure sensor.

Example 2

Referring to fig. 6, the MURA test fixture for the display module further includes a frame 6 that can be installed between the upper connecting plate 57 and the lower connecting plate 56, and the upper connecting rod 42 and the lower connecting rod 41, and the display module is installed in the frame 6 for testing, so as to simulate the actual installation structure of the display screen terminal, thereby obtaining a more testing result.

Example 3

Referring to fig. 7, the mounting post 31 is cylindrical, the upper connecting rod 42 is provided with a circular hole matched with the mounting post 31, and the upper connecting rod 42 is connected to the mounting post 31 in a rotatable manner, so that the upper connecting rod 42 is not required to be removed when being detached or installed, and the operation is convenient.

While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the embodiments described above, but is intended to be within the scope of the utility model, as long as such insubstantial modifications are made by the method concepts and technical solutions of the utility model, or the concepts and technical solutions of the utility model are applied directly to other occasions without any modifications.

Claims (10)

1. A MURA test fixture for display module assembly, its characterized in that, including base (1), the symmetry is equipped with track (11) on base (1), the symmetry track (11) one side is fixed with first fixed block (12) and second fixed block (14) respectively, the symmetry on track (11) sliding connection has first sliding block (2) and second sliding block (21), one side that first fixed block (12) and second fixed block (14) are close to each other is equipped with the mounting groove, one side that first sliding block (2) and second sliding block (21) are close to each other is equipped with the mounting groove, the symmetry can dismantle between the mounting groove and be connected with slide rail (13), the symmetry on slide rail (13) sliding connection has first sliding column (3), be fixed with pressure component (5) on second fixed block (14), be equipped with pressure detection device on pressure component (5), be fixed with second sliding column (32) on second sliding block (21), first sliding column (3) and second sliding block (21) are close to each other and are connected with clamping component (4).

2. The MURA test fixture for the display module assembly according to claim 1, wherein the first sliding column (3) is fixedly provided with a mounting column (31), the clamping assembly (4) comprises a lower connecting rod (41) fixed on the first sliding column (3), the other end of the lower connecting rod (41) is provided with a lower clamping block (411), the outer wall of the mounting column (31) is sleeved with an upper connecting rod (42), the other end of the upper connecting rod (42) is provided with an upper clamping block (421), the upper connecting rod (42) and the lower connecting rod (41) are respectively provided with threaded holes, and the upper connecting rod (42) and the lower connecting rod (41) are connected through screws.

3. The MURA test fixture for the display module according to claim 2, wherein the pressure assembly (5) comprises a fixing column (51) fixed at the upper end of the second fixing block (14), the fixing column (51) is of a hollow structure, a side groove (52) is formed in one side of the fixing column (51), a screw rod (55) is rotationally connected to the fixing column (51), a connecting block (53) is arranged at the upper end of the fixing column (51), an adjusting knob (54) is connected to the upper end of the screw rod (55) through the connecting block (53), the upper end and the lower end of the screw rod (55) are connected with the bottom of the connecting block (53) and the bottom of the fixing column (51) through bearings respectively, and the screw rod (55) is movably connected with a clamping assembly.

4. A MURA test fixture for a display module according to claim 3, wherein the clamping assembly comprises a lower connecting plate (56) and an upper connecting plate (57), a limit rod (561) is fixed on one side of the lower connecting plate (56), the limit rod (561) is connected with a threaded ring (562), the threaded ring (562) is movably connected with a screw rod (55), the other end of the lower connecting plate (56) is connected with a lower clamping block (411), the upper connecting plate (57) is connected with an upper clamping block (421), threaded holes are respectively formed in the upper connecting plate (57) and the lower connecting plate (56), and the upper connecting plate (57) is connected with the lower connecting plate (56) through screws.

5. The MURA test fixture for a display module according to claim 4, wherein the pressure detecting means is a pressure sensor installed at an upper end of a lower clamping block (411) connected to a lower connection plate (56).

6. The MURA test fixture for a display module according to claim 4, further comprising a frame (6) mountable between the upper connecting plate (57), the lower connecting plate (56), and the upper and lower connecting rods (42, 41).

7. A MURA test fixture for a display module according to claim 2, wherein the mounting post (31) is cylindrical, and the upper connecting rod (42) is provided with a circular hole cooperating with the mounting post (31).

8. The MURA test fixture for a display module according to claim 4, wherein the lower connection plate (56) is provided with connection posts (58), and the upper connection plate (57) is rotatably connected to the lower connection plate (56) through the connection posts (58).

9. The MURA test fixture for the display module according to claim 4, wherein a stopper (412) is provided at one side of the lower clamping block (411).

10. The MURA test fixture for the display module according to claim 9, wherein the contact surfaces of the upper clamping block (421), the lower clamping block (411) and the limiting block (412) for clamping the display module are respectively provided with an antistatic gasket.