CN220120695U - Display panel inspection machine - Google Patents

Abstract

The utility model relates to a display panel inspection machine which comprises an inspection table, a first lifting assembly, a second lifting assembly and an inspection main body. The inspection station comprises a bottom plate and a cross beam, and the display panel is placed on the bottom plate. The first lifting assembly comprises a fixing part, a telescopic part and a limiting piece, wherein the fixing part is arranged on the cross beam, and two ends of the telescopic part are respectively connected with the fixing part and the limiting piece. The second lifting assembly comprises a base, the base is provided with a containing cavity, the limiting piece is positioned in the containing cavity, and an air bag is arranged between the limiting piece and the cavity wall of the containing cavity. The inspection main body is arranged on the base, and the base is provided with air holes. The first driving piece drives the base to lift between the first position and the second position, and when the air bag is deflated, air is blown through the air hole to drive the base to lift between the second position and the third position. The structure is favorable for reducing the number of air holes and reducing the air injection control difficulty, and has the characteristics of simple overall structure and good inspection quality.

Description

Display panel inspection machine

Technical Field

The utility model relates to the technical field of display manufacturing, in particular to a display panel inspection machine.

Background

In the manufacturing process of the display panel, it is necessary to inspect the circuit pattern on the display panel to check whether the circuit pattern has a broken circuit or a short circuit defect. Referring to fig. 1, a conventional non-contact inspection apparatus includes an inspection table 1', a beam 2', and an inspection main body. The examination body is mounted on a beam 2', the examination body comprising a first electrode 3' and a second electrode 4'. The display panel 6' is placed on the inspection table 1' and is movable on the inspection table 1 '. A plurality of air holes 5 'are formed in one side surface of the inspection table 1' facing the display panel 6', and the air holes 5' are used for spraying air to the display panel 6', so that the display panel 6' is suspended below the inspection main body. The spacing between the display panel 6' and the inspection body is maintained in a suitable range (typically 100 μm to 200 μm) by adjusting the amount of air blown from the air holes 5' so that the first electrode 3' and the second electrode 4' can be capacitively coupled with the circuit pattern on the display panel 6 '. In the inspection, an alternating current detection signal is applied to the circuit pattern through the first electrode 3', the second electrode 4' acquires the detection signal from the corresponding circuit pattern, and the inspection main body processes the detection signal and judges whether the circuit pattern has a broken circuit or a short circuit defect.

The prior art has the following defects: because the overall size of the display panel 6' is large (e.g., 1800mm×2500 mm), all the air holes 5' must precisely control the air jet amount to maintain the display panel 6' in a horizontal state, and thus maintain the capacitive coupling state between the inspection body and the circuit pattern. In practical application, since the overall size of the display panel 6' is relatively large, a large number of air holes 5' and distance sensors are required to be arranged to maintain the horizontal state of the display panel 6', which results in complex overall structure and relatively high equipment cost. And, the air supply device for supplying air to the air holes 5' is affected by the aging of components, the blockage of pipelines, etc., which makes the control of the air injection amount difficult. In the checking process, when the air spraying amount is too small, the condition of failure of capacitive coupling between a checking main body and a circuit pattern is easy to occur, so that the checking is interrupted; when the amount of the air jet is excessively large, a case where the inspection main body collides with the circuit pattern easily occurs, and the circuit pattern is damaged.

Disclosure of Invention

The utility model aims to provide a display panel inspection machine which is simple in overall structure and good in inspection quality.

To achieve the purpose, the utility model adopts the following technical scheme:

provided is a display panel inspection machine including:

the inspection platform comprises a bottom plate for bearing a display panel and a cross beam positioned above the bottom plate, wherein a first position, a second position and a third position which are sequentially arranged from top to bottom are arranged between the cross beam and the display panel;

the first lifting assembly comprises a fixed part and a telescopic part, the fixed part is arranged on the cross beam, one end of the telescopic part is movably connected with the fixed part, the other end of the telescopic part is provided with a limiting part, and one side of the limiting part, which faces the fixed part, is provided with an inflatable and deflatable air bag;

the second lifting assembly comprises a base, a containing cavity is formed in the base, the telescopic part penetrates through the top of the base, the limiting piece is located in the containing cavity, the air bag is located between the limiting piece and the cavity wall of the containing cavity, and an air hole is further formed in the base and is used for injecting air downwards to drive the base to move in a lifting mode relative to the first lifting assembly;

an inspection body disposed on the base;

the first elevating assembly is capable of driving the base to elevate between the first position and the second position when the air bag is in an inflated state, and elevating between the second position and the third position when the air bag is in a deflated state, and capacitively coupling the inspection main body with the circuit pattern on the display panel.

As a preferred embodiment of the display panel inspection machine, a distance between the first position and the second position is larger than a distance between the second position and the third position.

As a preferable scheme of the display panel inspection machine, the display panel inspection machine further comprises at least three distance sensors, wherein the at least three distance sensors are distributed on one side face of the base, facing the bottom plate, in a triangular shape.

As a preferable mode of the display panel inspection machine, the base plate is provided with a plurality of driving wheels, the display panel is placed on the driving wheels, and the driving wheels are used for driving the display panel to move along the length direction of the base plate.

As a preferable mode of the display panel inspection machine, the cross beam is provided with a rack, and the fixing portion is in transmission connection with the rack so that the first lifting assembly can move along the width direction of the bottom plate.

As a preferable scheme of the display panel inspection machine, a guide groove is vertically arranged on the cavity wall of the accommodating cavity, a ball is arranged on the periphery of the limiting piece in a rolling mode, and the limiting piece is in rolling connection with the base through the ball and the guide groove.

As a preferable scheme of the display panel inspection machine, the guide grooves are multiple, the guide grooves are uniformly distributed at intervals along the circumferential direction of the accommodating cavity, the balls are multiple, and the balls and the guide grooves are in one-to-one correspondence.

As a preferable mode of the display panel inspection machine, a plurality of first lifting assemblies are arranged on the cross beam at intervals, and each first lifting assembly is correspondingly provided with the second lifting assembly and the inspection main body.

As a preferred scheme of the display panel inspection machine, the base comprises a mounting plate and a connecting part, the connecting part is arranged on one side surface of the mounting plate, which is away from the bottom plate, the connecting part and the mounting plate form the accommodating cavity therebetween, and the air holes and the inspection main body are arranged on the mounting plate.

As a preferable mode of the display panel inspection machine, the mounting plate is rectangular, and the air holes are arranged at least at four corners of the mounting plate; or alternatively, the first and second heat exchangers may be,

the mounting plate is circular, at least three air holes are formed in the mounting plate, and the at least three air holes are uniformly distributed at intervals along the circumferential direction of the mounting plate.

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

the display panel inspection machine of the utility model is characterized in that an inspection main body is arranged on a base, and an air hole for driving the base to lift is arranged on the base. Compared with the arrangement of air holes in the area corresponding to the display panel on the whole inspection table, the air holes are reduced, the integral structure is simplified, and the equipment cost is reduced. Meanwhile, the number of air holes on the base is small, the air spraying amount of the air holes is relatively easy to control, and the suspension height of the base and the horizontal state of the base are conveniently adjusted in real time so as to ensure that the inspection main body and the circuit pattern maintain a capacitive coupling state. Through setting up the gasbag that can fill the gassing for first lifting unit can descend the base to the second position that is close to display panel earlier, and rethread jet and self gravity make the base steadily descend to the position of implementing quality testing. In practical applications, the airbag is sized to control the descending height of the base from the second position to the third position, so as to avoid the circuit pattern from being damaged due to collision between the base and the display panel. Therefore, the display panel inspection machine has the characteristics of simple overall structure and good inspection quality.

Drawings

Fig. 1 is a cross-sectional view of a related art non-contact inspection apparatus.

Fig. 2 is a schematic diagram of a display panel inspection machine according to an embodiment of the utility model.

Fig. 3 is a cross-sectional view of a display panel inspection machine according to an embodiment of the present utility model.

Fig. 4 is a schematic view of a second lifting assembly in a first position according to an embodiment of the utility model.

Fig. 5 is a schematic view of the second lifting assembly in the second position according to the embodiment of the utility model.

Fig. 6 is a schematic view of the second lifting assembly in the third position according to the embodiment of the utility model.

FIG. 7 is a schematic view of a mounting plate according to an embodiment of the utility model.

Fig. 8 is a schematic view of a mounting plate according to another embodiment of the utility model.

In fig. 1:

1', an inspection table; 2', a cross beam; 3', a first electrode; 4', a second electrode; 5', air holes; 6', a display panel.

Fig. 2 to 8:

1. a first lifting assembly; 11. a fixing part; 12. a telescopic part; 13. a limiting piece; 14. an air bag; 15. a ball; 16. a first airway; 2. a second lifting assembly; 20. a receiving chamber; 21. a mounting plate; 22. a connection part; 23. a guide groove; 24. air holes; 3. an inspection station; 31. a bottom plate; 32. a cross beam; 33. a support plate; 34. a rack; 35. a guide rail; 36. a driving wheel; 4. a first electrode; 5. a second electrode; 6. a display panel; 7. a distance sensor.

Detailed Description

Advantages and features of the present utility model and methods of accomplishing the same may become apparent with reference to the following detailed description of embodiments taken in conjunction with the accompanying drawings. However, the present utility model is not limited to the embodiments disclosed below, but may be embodied in various different forms, which are provided only for the purpose of completing the disclosure of the present utility model and fully understanding the scope of the present utility model by those skilled in the art, and the present utility model is limited only by the scope of the claims. Like reference numerals denote like constituent elements throughout the specification.

Hereinafter, the present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 2 and 3, a display panel inspection machine is provided for inspecting whether or not a circuit pattern on a display panel 6 has a disconnection, a disconnection defect. The display panel 6 includes a glass substrate and a circuit pattern formed on the glass substrate. The display panel inspection machine includes an inspection table 3, a first elevating assembly 1, a second elevating assembly 2, and an inspection main body. Wherein the inspection table 3 plays a role of an overall support for mounting the first elevating assembly 1, the second elevating assembly 2 and the inspection body. The display panel 6 is placed on the inspection bench 3, and the first lifting assembly 1 and the second lifting assembly 2 are both used for driving the inspection main body to lift so that the inspection main body can be close to or far away from the display panel 6, and further quality inspection of the display panel 6 by the inspection main body is achieved.

The inspection station 3 includes a floor 31, a beam 32, and a support plate 33. The bottom plate 31 is used for carrying the display panel 6, a plurality of driving wheels 36 are distributed on the bottom plate 31 in an array, and the display panel 6 is placed on the driving wheels 36. The driving wheel 36 is rotated so that the driving wheel 36 can drive the display panel 6 to move in the longitudinal direction (X direction in the drawing) of the chassis 31. The support plates 33 are used for supporting the cross beam 32, two support plates 33 are respectively located at two ends of the bottom plate 31 in the width direction (Y direction in the drawing), and the support plates 33 and the bottom plate 31 are integrally formed. The length of the cross member 32 extends in the width direction of the bottom plate 31, and both ends of the cross member 32 are respectively connected to two support plates 33 such that the cross member 32 is disposed above the bottom plate 31 at a spacing. An inspection area for quality inspection of the display panel 6 is formed between the cross member 32 and the bottom plate 31. In quality inspection, the display panel 6 is positioned below the cross member 32.

Referring to fig. 3 and 4, the first lift assembly 1 includes a fixing portion 11, a telescopic portion 12, a stopper 13, and an airbag 14. The fixed part 11 is mounted on the cross beam 32, and one end of the telescopic part 12 is movably connected with the fixed part 11, so that the telescopic part 12 can move telescopically relative to the fixed part 11. The limiting piece 13 is of a flat plate structure, and the limiting piece 13 is arranged at one end of the telescopic part 12, which is away from the fixed part 11. The stopper 13 is disposed perpendicularly to the telescopic portion 12, and the telescopic portion 12 is coaxial with the stopper 13. The telescopic part 12 is vertically arranged, and when the first lifting assembly 1 performs telescopic movement, the telescopic part 12 and the limiting piece 13 perform lifting movement synchronously in the vertical direction. In an alternative embodiment, the first lifting assembly 1 may be a cylinder or an electric telescopic member, and the limiting member 13 is mounted at the output end of the cylinder or the electric telescopic member.

The air bag 14 is inflatable and deflatable, and the air bag 14 is provided on the side of the stopper 13 facing the fixing portion 11. The air bag 14 is of an annular structure, the air bag 14 is sleeved on the telescopic part 12, and the air bag 14 is annularly arranged in the peripheral area of the limiting piece 13. The telescopic part 12 and the limiting piece 13 are integrally formed, and a first air passage 16 for inflating or deflating the air bag 14 is formed in the telescopic part 12 and the limiting piece 13. Correspondingly, the first lifting assembly 1 further comprises a first air pump communicated with the first air passage 16 through an air pipe, and the air bag 14 is inflated or deflated by using the first air pump.

The second lifting assembly 2 comprises a base, the base is movably connected with the first lifting assembly 1, and the base is used for installing the inspection main body. Specifically, the base includes a mounting plate 21 and a connecting portion 22, the connecting portion 22 is disposed on a side surface of the mounting plate 21 facing away from the bottom plate 31, the connecting portion 22 is in a cavity structure, and the connecting portion 22 forms the accommodating cavity 20 between the mounting plate plates 21. The connection portion 22 is used for being connected with the first lifting assembly 1, specifically, the telescopic portion 12 is arranged at one end of the connection portion 22 away from the mounting plate 21 in a penetrating manner, that is, the telescopic portion 12 is arranged at the top of the base in a penetrating manner. The end of the telescopic part 12 facing away from the fixed part 11 extends into the accommodating cavity 20, so that the limiting piece 13 is positioned in the accommodating cavity 20. The connecting portion 22 is provided with a through hole for penetrating the telescopic portion 12, and the size of the limiting piece 13 is larger than the diameter of the through hole, so that the limiting piece 13 cannot penetrate through the through hole. The structure enables the base to hang on the first lifting assembly 1 under the limiting effect of the limiting piece 13, and the base can move along the length direction (Z direction in the drawing) of the telescopic part 12 so as to realize movable connection of the base and the first lifting assembly 1. Of course, the length of movement of the base along the telescopic portion 12 depends on the movement travel of the limiting member 13 within the housing cavity 20.

The balloon 14 is located between the stopper 13 and the cavity wall at the top of the receiving cavity 20. Under the weight of the base itself, the bladder 14 rests against the cavity wall of the containing cavity 20. Thus, the air bag 14 can act as a cushion between the base and the first lift assembly 1. Referring to fig. 5 and 6, when the air bag 14 is inflated, that is, the spacing between the stopper 13 and the top chamber wall of the accommodating chamber 20 is made L1; when the air bag 14 is deflated, the air bag 14 is in a concave state, the base can be lowered by a certain height relative to the limiting piece 13, so that the limiting piece 13 is close to the top cavity wall of the accommodating cavity 20, and at the moment, the spacing between the limiting piece 13 and the top cavity wall of the accommodating cavity 20 is L2, and L2 is smaller than L1.

Referring to fig. 4 and 7, the mounting plate 21 of the base is provided with air holes 24, and the openings of the air holes 24 face the bottom plate 31. Correspondingly, a second air passage communicated with the air hole 24 is also arranged on the mounting plate 21. Correspondingly, the second lifting assembly 2 further comprises a second air pump, and the second air pump is communicated with the second air passage so that the air pump can convey compressed air to the air hole 24 through the second air passage. The air is blown downwards through the air holes 24 to drive the base to move relative to the first lifting assembly 1, i.e. the air is blown through the air holes 24 to drive the base to move up and down.

The examination subject comprises a processor, a first electrode 4 and a second electrode 5. The first electrode 4 and the second electrode 5 are electrically connected with the processor. The first electrode 4 and the second electrode 5 are mounted on the mounting plate 21 with the first electrode 4 being spaced from the second electrode 5. When the base and the display panel 6 are at a suitable distance (typically a distance of 100 μm-200 μm), the first electrode 4 and the second electrode 5 can be capacitively coupled with the circuit pattern on the display panel 6. At this time, a closed loop is formed between the processor, the first electrode 4, the second electrode 5, and the circuit pattern. At the time of inspection, the first electrode 4 applies an alternating detection signal to the circuit pattern. The second electrode 5 acquires a detection signal from the corresponding circuit pattern, and the processor processes the detection signal and judges whether the circuit pattern has a broken circuit or a short circuit defect.

Referring to fig. 3 to 6, in this embodiment, the specific operation procedure of the display panel inspection machine is as follows:

in the first step, the first lift assembly 1 is in a shortened state and the air bag 14 is inflated. The display panel 6 is carried under the cross member 32 by the driving wheel 36 and positions the display panel 6. The cross member 32 and the display panel 6 have a first position, a second position, and a third position arranged in this order from top to bottom. At this time, the base is located at the first position, the distance between the mounting plate 21 and the display panel 6 is H1, and the distance between the stopper 13 and the top wall of the accommodating chamber 20 is L1;

in a second step, the first lifting assembly 1 is extended so that the first lifting assembly 1 can drive the base to descend from the first position to the second position. At this time, the base is located at the second position, the distance between the mounting plate 21 and the display panel 6 is H2, and the distance between the stopper 13 and the top wall of the accommodating chamber 20 is L1;

third, the air bag 14 is deflated and the air bag 14 is in a recessed state to enable the base to move up and down relative to the first lift assembly 1. At this time, the base can continue to descend to approach the display panel 6. The air holes 24 jet downwards, the descending speed of the base can be adjusted by controlling the air jet quantity of the air holes 24, and the base is suspended above the display panel 6 by the air holes 24 jet downwards. At this time, the base is located at the third position, the distance between the mounting plate 21 and the display panel 6 is H3, and the distance between the stopper 13 and the top wall of the accommodating chamber 20 is L2. When the base is in the third position, the first electrode 4 and the second electrode 5 on the mounting board 21 can be capacitively coupled with the circuit pattern on the display panel 6;

fourth, the inspection body performs quality inspection on the display panel 6, and the base returns to the first position after the inspection is completed.

It will be appreciated that the elevation of the base is affected by the size of the air bladder 14 as the base is moved up and down between the second and third positions. I.e. the spacing between the stop 13 and the top chamber wall of the receiving chamber 20 determines the movement stroke of the base relative to the first lifting assembly 1. Therefore, by selecting the size of the air bag 14, the descending height of the base from the second position is smaller than the distance H2 between the second position and the display panel 6, so that the base can still keep a spaced state with the display panel 6 when the base descends to the lowest position. So as to prevent the base from colliding with the display panel 6 due to abnormal control of the air jet quantity of the air hole 24.

Optionally, the spacing between the first position and the second position is greater than the spacing between the second position and the third position. I.e. the lifting stroke of the base driven by the first lifting assembly 1 is larger than the lifting stroke of the base controlled by air injection. It will be appreciated that the first lift assembly 1 directly drives the movement of the base by mechanical means, facilitating a rapid movement of the base from the first position to the second position. When the base moves from the second position to the third position, air is injected by the air holes 24 to control the smooth movement of the base and to suspend the base stably above the display panel 6. The motion travel of the base is relatively small during the air injection control, which is beneficial to reducing the difficulty of the air injection control, and further ensures that the inspection main body can maintain capacitive coupling with the circuit pattern on the display panel 6.

Alternatively, referring to fig. 7 and 8, the display panel inspection machine further includes a distance sensor 7, the distance sensor 7 being for detecting a distance between the mounting plate 21 of the base and the display panel 6. The number of the distance sensors 7 is at least three, and the at least three distance sensors 7 are distributed on the mounting plate 21 of the base in a triangular shape. It will be appreciated that the distance sensors 7 are distributed in a triangle, and the overall levelness of the mounting plate 21 can be detected. The distance sensor 7, the first electrode 4, the second electrode 5 and the air hole 24 are all arranged on one side surface of the mounting plate 21 facing the bottom plate 31, so that the mounting plate 21 can face the display panel 6.

In one embodiment, the mounting plate 21 is rectangular, and it is also understood that the mounting plate 21 is rectangular in cross-section. The number of the air holes 24 is four, and the four air holes 24 are respectively positioned at four corners of the mounting plate 21. The number of the distance sensors 7 is three, and the three distance sensors 7 are distributed at intervals in a triangle shape. The distance sensor 7 is electrically connected with the second lifting assembly 2. In practical application, the air injection amount of the air holes 24 is adjusted in real time by monitoring the distance between the mounting plate 21 and the display panel 6, so that the mounting plate 21 and the display panel 6 are ensured to be at a proper distance, and further, the capacitive coupling of the first electrode 4 and the second electrode 5 with the circuit patterns on the display panel 6 is ensured. At the same time, collision between the display panel 6 and the mounting plate 21 can be avoided.

In another embodiment, the mounting plate 21 is circular, and it is also understood that the mounting plate 21 has a circular cross section. The number of the air holes 24 is three, the three air holes 24 are uniformly distributed at intervals along the circumferential direction of the mounting plate 21, and the air holes 24 are arranged near the circumferential portion of the mounting plate 21. The number of the distance sensors 7 is three, and the three distance sensors 7 are distributed at intervals in a triangle shape. The distance sensor 7 is electrically connected with the second lifting assembly 2. In practical application, the air injection amount of the air holes 24 is adjusted in real time by monitoring the distance between the mounting plate 21 and the display panel 6, so that the mounting plate 21 and the display panel 6 are ensured to be at a proper distance, and further, the capacitive coupling of the first electrode 4 and the second electrode 5 with the circuit patterns on the display panel 6 is ensured. At the same time, collision between the display panel 6 and the mounting plate 21 can be avoided.

Of course, in other embodiments, the number and distribution of the air holes 24 may be reasonably selected according to the overall size of the mounting plate 21.

Alternatively, as shown with reference to fig. 4, a guide groove 23 is vertically provided on a cavity wall of the receiving cavity 20 of the base, i.e., a length of the guide groove 23 extends in a vertical direction. The stopper 13 is provided with balls 15 in a rolling manner on the periphery thereof, and the balls 15 are inserted into the guide grooves 23 and can roll along the longitudinal direction of the guide grooves 23. This structure enables rolling connection between the stopper 13 and the base through the balls 15 and the guide grooves 23, respectively, to reduce the movement resistance between the base and the first lift assembly 1. When the balloon 14 is deflated, the base can be lowered smoothly. Meanwhile, the guide groove 23 plays a role in guiding the limiting piece 13, so that the base can only move up and down relative to the first lifting assembly 1, the base can be prevented from rotating due to the influence of the air injection direction, and the inspection main body and the display panel 6 can be further ensured to maintain a capacitive coupling state.

In order to uniformly stress the entire base, a plurality of guide grooves 23 are provided, and the plurality of guide grooves 23 are uniformly spaced apart in the circumferential direction of the accommodating chamber 20. Correspondingly, a plurality of balls 15 are provided, and a plurality of balls 15 are provided in one-to-one correspondence with a plurality of guide grooves 23.

Optionally, referring to fig. 3, the inspection station 3 further includes a rack 34 and a rail 35, and the rack 34 and the rail 35 are parallel to the cross beam 32. Rack 34 and rail 35 are mounted on beam 32. The first lifting assembly 1 further comprises a motor and a gear, wherein the motor is used for providing movement power, the motor is arranged on the fixed part 11, the output end of the motor is in transmission connection with the gear, and the gear is meshed with the rack 34 so as to realize transmission connection between the fixed part 11 and the rack 34. The guide rail 35 is disposed through the fixing portion 11, and the fixing portion 11 is slidably connected to the guide rail 35. The relative movement between the gear and the rack 34 is driven by the motor to realize the movement of the first lifting assembly 1 in the width direction of the bottom plate 31. It will be appreciated that by moving the display panel 6 in the length direction of the chassis 31 and by moving the base in the width direction of the chassis 31, it is achieved that the inspection body on the base can be moved to various areas on the display panel 6 for quality inspection.

The cross beam 32 is provided with a plurality of first lifting assemblies 1 at intervals, and correspondingly, the number of the second lifting assemblies 2 and the number of the inspection main bodies are the same as those of the first lifting assemblies 1, namely, each first lifting assembly 1 is correspondingly provided with one second lifting assembly 2 and one inspection main body. By providing a plurality of inspection subjects, quality inspection can be performed simultaneously on a plurality of circuit patterns on the display panel 6.

In this embodiment, six first lifting assemblies 1 are provided on the cross beam 32, that is, six second lifting assemblies 2 and six inspection bodies are correspondingly provided. A first electrode 4 and a second electrode 5 are arranged on the mounting plate 21 at intervals, and the first electrode 4 and the second electrode 5 on different mounting plates 21 form an inspection main body. This approach is advantageous in reducing the overall size of the mounting board 21 and adapting to the specific length of the circuit pattern on the display panel 6. For example, when one end of one of the circuit patterns on the display panel 6 is located at the middle of the display panel 6, the other end is located at the periphery of the display panel 6. At this time, a loop may be formed by using the first electrode 4 on one of the bases at the middle position of the beam 32 and the second electrode 5 on the base at the end position of the beam 32 to achieve quality inspection of the circuit pattern.

The technical effects of this embodiment are: by mounting the inspection body on the base and providing the air hole 24 for driving the base to rise and fall on the base. Compared with the arrangement of the air holes 24 in the area corresponding to the display panel 6 on the whole inspection bench, the air holes 24 are reduced, the integral structure is simplified, and the equipment cost is reduced. Meanwhile, the number of the air holes 24 on the base is small, the air spraying amount of the air holes 24 is relatively easy to control, and the suspension height of the base and the horizontal state of the base are conveniently adjusted in real time so as to ensure that the inspection main body and the circuit pattern maintain a capacitive coupling state. By providing the inflatable and deflatable air bag 14, the first lifting assembly 1 can firstly lower the base to the second position close to the display panel 6, and then stably lower the base to the position for implementing quality detection through air injection and self gravity. In practical applications, the airbag 14 is sized to control the descending height of the base from the second position to the third position, so as to avoid the circuit pattern from being damaged due to collision between the base and the display panel 6. Therefore, the display panel inspection machine has the characteristics of simple overall structure and good inspection quality.

Although the embodiments of the present utility model have been described above with reference to the accompanying drawings, the present utility model is not limited to the above embodiments, but may be manufactured in various forms, and it will be understood by those skilled in the art that the present utility model may be embodied in other specific forms without changing the technical spirit or essential features of the present utility model. Accordingly, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive.

Claims (10)

1. A display panel inspection machine, comprising:

the inspection platform comprises a bottom plate for bearing a display panel and a cross beam positioned above the bottom plate, wherein a first position, a second position and a third position which are sequentially arranged from top to bottom are arranged between the cross beam and the display panel;

the first lifting assembly comprises a fixed part and a telescopic part, the fixed part is arranged on the cross beam, one end of the telescopic part is movably connected with the fixed part, the other end of the telescopic part is provided with a limiting part, and one side of the limiting part, which faces the fixed part, is provided with an inflatable and deflatable air bag;

the second lifting assembly comprises a base, a containing cavity is formed in the base, the telescopic part penetrates through the top of the base, the limiting piece is located in the containing cavity, the air bag is located between the limiting piece and the cavity wall of the containing cavity, and an air hole is further formed in the base and is used for injecting air downwards to drive the base to move in a lifting mode relative to the first lifting assembly;

an inspection body disposed on the base;

the first elevating assembly is capable of driving the base to elevate between the first position and the second position when the air bag is in an inflated state, and elevating between the second position and the third position when the air bag is in a deflated state, and capacitively coupling the inspection main body with the circuit pattern on the display panel.

2. The display panel inspection machine of claim 1, wherein a spacing between the first location and the second location is greater than a spacing between the second location and the third location.

3. The display panel inspection machine of claim 1, further comprising at least three distance sensors, wherein at least three of the distance sensors are triangularly distributed on a side of the base facing the base plate.

4. The display panel inspection machine according to claim 1, wherein a plurality of driving wheels are provided on the base plate, the display panel being placed on the driving wheels for driving the display panel to move in a length direction of the base plate.

5. The display panel inspection machine according to claim 4, wherein a rack is provided on the cross member, and the fixing portion is in driving connection with the rack so that the first elevating assembly can move in a width direction of the base plate.

6. The display panel inspection machine according to claim 1, wherein a guide groove is vertically provided on a cavity wall of the accommodating cavity, a ball is provided on a peripheral portion of the stopper in a rolling manner, and the stopper is in rolling connection with the base through the ball and the guide groove.

7. The display panel inspection machine according to claim 6, wherein the guide grooves are plural, the plural guide grooves are uniformly spaced along the circumferential direction of the accommodation chamber, the plural balls are plural, and the plural balls are disposed in one-to-one correspondence with the plural guide grooves.

8. The display panel inspection machine according to any one of claims 1 to 7, wherein a plurality of the first elevating assemblies are provided on the cross beam at intervals, each of the first elevating assemblies being provided with the second elevating assembly and the inspection main body, respectively.

9. The display panel inspection machine according to any one of claims 1 to 7, wherein the base includes a mounting plate and a connecting portion, the connecting portion is disposed on a side surface of the mounting plate facing away from the bottom plate, the receiving chamber is formed between the connecting portion and the mounting plate, and the air hole and the inspection body are both disposed on the mounting plate.

10. The display panel inspection machine according to claim 9, wherein the mounting plate is rectangular, and the air holes are provided at least at four corner positions of the mounting plate; or alternatively, the first and second heat exchangers may be,

the mounting plate is circular, at least three air holes are formed in the mounting plate, and the at least three air holes are uniformly distributed at intervals along the circumferential direction of the mounting plate.