CN110706630B

CN110706630B - Electrical detection jig and electrical detection method applied to narrow-frame display panel

Info

Publication number: CN110706630B
Application number: CN201911005377.5A
Authority: CN
Inventors: 王磊; 金艳
Original assignee: AU Optronics Kunshan Co Ltd
Current assignee: AU Optronics Kunshan Co Ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2022-08-30
Anticipated expiration: 2039-10-22
Also published as: CN110706630A

Abstract

The invention discloses an electrical detection jig and an electrical detection method applied to a narrow-frame display panel, wherein the electrical detection jig applied to the narrow-frame display panel comprises a base body, a cover plate and a detection pressure head, the base body comprises a placing surface, the cover plate is pivoted on the base body and enables the cover plate to movably cover the placing surface, the detection pressure head is arranged on the cover plate and enables the detection pressure head to be far away from or close to the placing surface along with the cover plate, the detection pressure head comprises a metal probe and a lifting mechanism, the metal probe is connected to the lifting mechanism, and when the cover plate covers the base body, the lifting mechanism drives the metal probe to move along a vertical direction. The electric detection jig and the electric detection method applied to the narrow-frame display panel adopt a two-section type pressing electric detection mode, are suitable for COF models and non-COF models, obviously improve the problem of scratching of the line end of the display panel to be detected, and have large operation space.

Description

Electrical detection jig and electrical detection method applied to narrow-frame display panel

Technical Field

The invention relates to the technical field of display device manufacturing, in particular to an electric detection jig which is used for detecting a display panel and is applied to a narrow-frame display panel and an electric detection method using the electric detection jig.

Background

In the manufacturing process of the liquid crystal display panel, the flexible circuit board on the display panel needs to be electrically tested. The existing electrical test fixture generally adopts the following two modes: 1) in the mode of rotating and pressing down the bearing, an electric test probe on the jig is easy to scrape and rub with a test pad at the line end of the display panel and nearby lines back and forth, and the quality of the display panel is influenced; 2) the perpendicular mode that pushes down of tool electrical test probe, when personnel got and put display panel under this mode, display panel easily collided with the electrical test pressure head, probably caused display panel breakage, personnel injured scheduling problem.

Disclosure of Invention

The invention aims to provide an electrical detection jig applied to a narrow-frame display panel, which solves the problem that the conventional electrical detection jig can damage the display panel.

Another objective of the present invention is to provide a method for electrically testing a display panel by using the above electrical testing fixture applied to a narrow-bezel display panel.

In order to achieve the above object, the electrical detection fixture applied to the narrow-frame display panel of the present invention includes a base, a cover plate and a detection pressure head, wherein the base includes a placing surface, the cover plate is pivoted to the base and movably covers the placing surface, and the detection pressure head is disposed on the cover plate so that the detection pressure head can be far away from or close to the placing surface along with the cover plate. The detection pressure head comprises a metal probe and a lifting mechanism, the metal probe is connected to the lifting mechanism, and when the cover plate covers the base body, the lifting mechanism drives the metal probe to move along a vertical direction.

In an embodiment of the electrical detection tool applied to the narrow-bezel display panel, one side of the cover plate is connected to one side of the base through a pivot, and the detection pressure head is connected to the side of the cover plate connected to the pivot.

In an embodiment of the electrical detection tool applied to the narrow-frame display panel, the detection pressure head extends along a first direction, and the first direction is parallel to the pivot.

In an embodiment of the above-mentioned electric detection tool applied to the narrow-bezel display panel, the lifting mechanism includes a support column, a return spring sleeved on the support column, and a shifting block connected with the metal probe, and the shifting block moves to drive the metal probe to move downwards along the vertical direction and compress the return spring.

In an embodiment of the above-mentioned electric detection tool applied to the narrow-bezel display panel, the metal probe includes a pointer plate, the pointer plate includes a guide hole, and the pointer plate is tied on the support column through the guide hole.

In an embodiment of the above-mentioned electric detection tool applied to the narrow-bezel display panel, the shifting block rotates and has a first position and a second position, in the first position, the shifting block supports against the pointer plate to move downwards along the vertical direction and compress the return spring, and in the second position, the return spring resets to drive the pointer plate to move upwards along the vertical direction.

In an embodiment of the electrical detection tool applied to the narrow-bezel display panel, the placing surface includes a fixing structure.

In an embodiment of the electrical detection tool applied to the narrow-bezel display panel, the cover plate includes a fixing structure.

In an embodiment of the electrical detection fixture applied to the narrow-frame display panel, the electrical detection fixture further includes a bearing plate, and the bearing plate is located between the cover plate and the base body.

In an embodiment of the foregoing electrical detection fixture applied to a narrow-bezel display panel, the fixture further includes an electric control unit for detecting whether the detection pressure head is electrified, and a hot plug unit electrically connected to the electric control unit.

The electrical detection method of the invention adopts the electrical detection jig applied to the narrow-frame display panel to electrically detect the display panel to be detected, and comprises the following steps:

s100, placing a display panel to be detected on a placing surface;

s200, the cover plate is rotationally covered on the placing surface to fix the display panel to be detected between the base body and the cover plate; and

and S300, the metal probe of the detection pressure head moves downwards along the vertical direction and is electrically connected with the test pad of the display panel to be detected.

In an embodiment of the electrical detection method, when the display panel to be detected is electrified, the metal probe of the detection pressure head is electrically connected with the test pad of the display panel to be detected through the hot plug unit, and the cover plate is locked and closed with the base body.

In an embodiment of the above electrical detection method, the step S200 further includes: when the cover plate is closed, the backlight switch is triggered to be opened, and when the cover plate is opened, the backlight switch is triggered to be closed.

The electric detection jig and the electric detection method applied to the narrow-frame display panel have the beneficial effects that the electric detection jig and the electric detection method adopt a two-section type pressing electric detection mode, are suitable for COF models and non-COF models, obviously improve the problem of scratching of the line end of the display panel to be detected, and have large operation space.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1 is a schematic structural diagram of a display panel to which an electrical detection fixture applied to a narrow-bezel display panel according to an embodiment of the present invention is applied;

fig. 2 is a schematic perspective view (with the cover closed) of the electrical detection tool applied to the narrow-bezel display panel according to the present invention;

fig. 3 is a schematic three-dimensional structure diagram (with the cover opened) of the electrical detection fixture applied to the narrow-bezel display panel according to the present invention;

FIG. 4 is a top view (with the cover closed) of the electrical inspection fixture applied to a narrow-bezel display panel according to the present invention;

FIG. 5 is a side view of the electrical inspection tool of the present invention applied to a narrow-bezel display panel (with the inspection indenter pressed down);

FIG. 6 is a side view of the electrical testing fixture applied to a narrow-bezel display panel according to the present invention (the testing indenter is not pressed down);

fig. 7 is a schematic perspective view illustrating an electrical detection fixture for a display panel with a narrow bezel according to an embodiment of the present invention;

fig. 8 is a schematic partial perspective view illustrating an electrical detection fixture applied to a narrow-bezel display panel according to an embodiment of the present invention;

FIG. 9 is a step diagram of the electrical detection method of the present invention.

Wherein the reference numerals

10: display panel

11: display area

12: peripheral zone

13: IC control circuit

13 a: test pad

14: chip on film

15: flexible circuit board

20: be applied to narrow frame display panel's electrical detection tool

100: base body

110: placing surface

111: fixing groove

120: side edge

200: cover plate

201: handle (CN)

202: fixing frame

210: side edge

300: detection pressure head

310: metal probe

311: pointer board

312: guide hole

313: test needle

320: lifting mechanism

321: support column

322: reset spring

323: shifting block

323 a: lowest end

400: pivot shaft

500: electric control unit

600: hot plug unit

700: bearing plate

800: backlight switch

Detailed Description

The following detailed description of the embodiments of the present invention with reference to the drawings and specific examples is provided for further understanding the objects, aspects and effects of the present invention, but not for limiting the scope of the appended claims.

References in the specification to "an embodiment," "another embodiment," "the present embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not intended to refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Where certain terms are used in the specification and following claims to refer to particular components or features, those skilled in the art will understand that various terms or numbers may be used by a skilled user or manufacturer to refer to the same component or feature. This specification and the claims that follow do not intend to distinguish between components or features that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. In addition, the term "coupled" is intended to include any direct or indirect coupling.

It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. appears on the basis of the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. For the sake of clarity, the terms "first," "second," "third," "fourth," and the like, as used herein, are used to distinguish one element, region, or section from another, the same or similar element, region, or section, and are not intended to limit the particular element, region, or section.

Fig. 1 is a schematic structural diagram of a display panel to which an electrical detection fixture applied to a narrow-bezel display panel of the present invention is applied. The display panel 10 has a display area 11 and a peripheral area 12, and with the trend of the display panel with a narrow frame, the smaller the proportion of the peripheral area 12 of the display panel 10 is, the better.

The display panel 10 further includes an IC control Circuit 13, a plurality of test pads 13a, a Chip On Film 14 (COF), and a Flexible Printed Circuit (FPC) 15, wherein the IC control Circuit 13 is disposed On the COF 14, and the test pads 13a electrically connected to the IC control Circuit 13 are disposed in the peripheral region 12. The IC integrated circuit 13 is connected to the flexible circuit board 15 through the COF 14, IC signals on the COF 14/the flexible circuit board 15 are transmitted to the display area 11 through the plurality of test pads 13a, and the test signals are transmitted through the plurality of test pads 13a during the test period.

Moreover, the chip on film 14 and the flexible circuit board 15 (shown by the dotted line in fig. 1) are bent and attached to the back surface of the display panel 10, which is beneficial to reducing the size of the peripheral region 12. The electrical detection jig of the invention is particularly suitable for the narrow-frame display panel or COF display panel.

In general, a plurality of test pads 13a of an IC control circuit of a narrow-bezel display panel or COF display panel are narrow, and a distance between adjacent test pads 13a is short.

As shown in fig. 2, 3 and 4, fig. 2 and 3 are schematic perspective views illustrating the cover plate closing and the cover plate opening of the electrical detection fixture applied to the narrow-bezel display panel according to the present invention, respectively, and fig. 4 is a top view illustrating the cover plate closing of the electrical detection fixture applied to the narrow-bezel display panel according to the present invention. The electrical detection fixture 20 applied to the narrow-bezel display panel of the present invention comprises a base 100, a cover plate 200 and a detection pressure head 300, wherein the base 100 comprises a placing surface 110, and the cover plate 200 is pivotally connected to the base 100, so that the cover plate 200 can movably cover the placing surface 110 of the base 100. That is, the cover 200 is rotated to cover the mounting surface 110 of the seat body 100, or the cover 200 is rotated to open with respect to the mounting surface 110 of the seat body 100. The detecting ram 300 is disposed on the cover plate 200, and when the cover plate 200 is movably covered on the placing surface 110, the detecting ram 300 can be far away from or close to the placing surface 110 along with the cover plate 200.

In an embodiment of the present invention, the cover plate 200 may further include a handle 201 disposed at the edge, and the cover plate 200 may be rotated away from or close to the placing surface 110 by the handle 201, wherein the handle 201 is, for example, a block.

Specifically, as shown in fig. 2, the detecting ram 300 includes a metal probe 310 and a lifting mechanism 320, wherein the metal probe 310 is connected to the lifting mechanism 320, and when the cover plate 200 is covered on the base 100, the lifting mechanism 320 drives the metal probe 310 to move along a vertical direction, which is a direction perpendicular to the display panel 10 or a direction perpendicular to the placing surface 110, with reference to fig. 1, so that the metal probe 310 is communicated with the test pad 13a on the display panel 10 and performs electrical detection. As shown in fig. 2, the placement surface 110 is, for example, horizontally inverted extending along the XY plane, and the vertical direction is the Z direction perpendicular to the XY plane.

The electrical detection jig 20 applied to the narrow-frame display panel of the present invention adopts a two-stage type pressing electrical detection mode, and is suitable for COF models and non-COF models.

First, the cover plate 200 is rotated to open or close with respect to the housing 100 along with the detection ram 300. When the cover plate 200 is opened relative to the seat body 100, the cover plate 200 and the detection indenter 300 thereon are far away from the display panel 10 on the placing surface 110, so that an enough operating space is provided for a worker to pick and place the display panel 10, the operation display panel 10 is effectively prevented from being collided and broken, and the metal probes 310 on the detection indenter 300 are not easy to scratch with the test pads 13a of the display panel 10 and nearby circuits. When the cover 200 is closed relative to the base 100, the display panel 20 is fixed between the base 100 and the cover 200.

Then, the cover plate 200 is pressed down vertically, that is, along the vertical direction Z, and after the cover plate 200 is covered on the base 100, the detection pressure head 300 on the cover plate 200 contacts with the test pad 13a of the display panel 10 in a vertically pressing manner, and performs an electrical test, so as to effectively prevent the test pad 13a of the display panel 10 and nearby circuits from being scratched.

In the present invention, the inspection indenter 300 may be disposed at any position of the cover plate 200 as needed, and the metal probes 310 of the inspection indenter 300 may correspond to the test pads 13a of the display panel 10 placed on the placement surface 110.

The side 210 of the cover plate 200 is connected to the side 120 of the housing 100 by a pivot 400, as shown in fig. 3 and 4, and in an embodiment of the present invention, the detection ram 300 is connected to the side 210 of the cover plate 200 connected to the pivot 400. Preferably, the detector ram 300 extends in a first direction X (shown in fig. 4), which is parallel to the axis of the pivot 400.

As shown in fig. 2 and 3 and fig. 5 and 6, fig. 5 and 6 are side views of the detecting press head of the electrical detecting tool applied to the narrow-frame display panel according to the present invention pressed and not pressed (the hot plug unit and the electrical control unit are not shown). The elevating mechanism 320 of the inspection head 300 includes a support column 321, a return spring 322, and a dial 323. The supporting posts 321 are a supporting base, and in this embodiment, two supporting posts 321 are connected and supported on the side 210 of the cover plate 200. The two return springs 322 are sleeved on the two support posts 321, and in this embodiment, the two return springs 322 are also sleeved on the two support posts 321 respectively. The block 323 is connected to the metal probe 310. The movement of the block 323 causes the metal probe 310 to move downward in the vertical direction and compress the return spring 322.

In detail, the metal probe 310 includes a pointer plate 311, a guide hole 312 (shown in fig. 2) is disposed on the pointer plate 311, and the pointer plate 311 is hitched on the support column 321 through the guide hole 312. When the cover 200 is closed relative to the base 100, the shifting block 323 moves to drive the pointer plate 311 to move downward along the vertical direction under the guidance of the supporting column 321.

The metal probe 310 further includes a test pin 313, and the test pin 313 is connected below the pointer plate 311 to be opposite to a test pad of the display panel 10. A return spring 322 is connected between the pointer plate 311 and the cover plate 100.

The shifting block 323 abuts against the pointer plate 311, and the shifting block 323 rotates to have a first position and a second position.

As shown in fig. 5, when the shifting block 323 rotates to the first position, that is, when the detection ram 300 is pressed down, the position of the lowest end 323a of the shifting block 323 in the vertical direction is lowered, and the pointer plate 311 sleeved on the supporting column 321 is pressed down in the vertical direction, and the return spring 322 is compressed. At this time, the test needles 313 lowered along with the pointer plates 311 communicate with the test pads of the display panel 10 positioned on the mounting surface 110, at which time the electrical test process can be performed.

As shown in fig. 6, when the display panel 10 is taken out after the electrical testing process, the shifting block 323 rotates to the second position, that is, when the detection ram is lifted, the position of the lowest end 323a of the shifting block 323 in the vertical direction rises, the force applied to the pointer plate 311 disappears, and at this time, the return spring 322 returns to push the pointer plate 311 to move upward in the vertical direction, and the test needle 313 connected to the pointer plate 311 rises together with the pointer plate 311 and is separated from the test pad 13a of the display panel 10.

Then, the cover plate 200 is rotated to open, the test indenter 300 is separated from the display panel 10 along with the cover plate 200, and the next real panel can be replaced by the worker.

Referring to fig. 1 and 2, the electrical detection tool 20 applied to the narrow-bezel display panel according to the embodiment of the present invention further includes an electrical control unit 500 and a hot plug unit 600, the electrical control unit 500 is used for detecting whether the detection ram 300 is electrified, and the hot plug unit 600 and the electrical control unit 500 are electrically connected to each other. When the electric control unit 500 detects that the display panel 10 to be detected is electrified, the metal probes 310 of the detection indenter 300 are in locking electrical connection with the test pads 13a of the display panel 10 to be detected through the hot swap unit 600, and the cover plate 200 is locked and closed with the base body 100. Once the electric control unit 500 detects that the display panel 10 is still electrified, the hot plug unit 600 ensures that the detection ram 300 cannot be bounced and the cover plate 200 cannot be opened, i.e., operations such as taking and placing the display panel 10 cannot be performed at this moment.

The hot plug unit 600 is arranged in the embodiment of the invention, when the jig is powered on, the hot plug unit 600 automatically fixes the cover plate 100 and the detection pressure head 300 to be immovable, the test pressure head 300 is prevented from being flicked and the cover plate 200 is prevented from being lifted when the power is not off, the static residue on the display panel 10 caused by improper operation methods of workers is effectively prevented, and the personal safety problem caused by abnormal operation of the workers is avoided.

In another embodiment of the present invention, the placing surface 110 of the electrical inspection tool 20 applied to the narrow-bezel display panel includes a fixing structure for fixing the display panel 10 to be inspected. As shown in fig. 7, the fixing structure is, for example, a fixing groove 111 having a size corresponding to the size of the display panel 10 to be inspected and provided on the placing surface 110.

In another embodiment of the present invention, the cover plate 200 of the electrical inspection fixture 20 applied to the narrow-bezel display panel includes a fixing structure for fixing the display panel 10 to be inspected. As shown in fig. 8, the fixing structure is, for example, a fixing frame 202 having a size corresponding to the size of the display panel 10 to be inspected, and provided to the cover plate 200 facing the mounting surface 111.

As shown in fig. 3, in another embodiment of the present invention, the electrical detection fixture 20 applied to the narrow-bezel display panel further includes a carrier tray 700, the carrier tray 700 is located between the cover plate 200 and the base 100, and the carrier tray 700 of this embodiment is designed to be independent from the main body 100 and the cover plate 200. Compared with the fixing structure of the above embodiment, the carrier tray 700 of the present embodiment can be designed to be suitable for fixing the display panels 10 with different sizes.

Correspondingly, the testing pins 313 of the testing indenter 300 are designed to have a sliding rail and movable positions to accommodate the testing pads 13a of the display panel 10 with different sizes, i.e., the testing pins 313 can be moved along the Y direction to adjust the positions to ensure correspondence with the testing pads 13a of the display panel 10.

To the test of different display panels, this embodiment can realize the electrical test through changing the test needle 311 counterpoint that bears dish 700 and adjustment test pressure head 300, need not change a whole set of tool and accomplish, has improved the suitability of tool, has practiced thrift the cost.

In summary, referring to fig. 9, fig. 9 is a step diagram of the electrical detection method of the present invention, and the electrical detection method of the present invention includes the following steps:

s100, placing a display panel to be detected on a placing surface of a seat body;

s200, the cover plate is rotatably covered on the placing surface of the base body so as to fix the display panel to be detected between the base body and the cover plate; and

When the display panel to be detected is electrified, the metal probe of the detection pressure head is electrically connected with the test pad of the display panel to be detected through the hot plug unit in a locking mode, and the cover plate is locked and closed with the base body.

The electrical detection fixture 20 applied to the narrow-bezel display panel further includes a backlight switch 800, and the step S200 further includes the following steps: referring to fig. 3, when the cover plate 200 is rotated and closed, the backlight switch 800 is triggered to be turned on, and when the cover plate 200 is opened, the backlight switch 800 is triggered to be turned off, so that the automatic backlight turning-on is realized.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides an be applied to narrow frame display panel's electrical detection tool which characterized in that includes:

a base body comprising a placing surface;

the cover plate is pivoted to the base body, so that the cover plate can movably cover the placing surface; and

a detection ram disposed on the cover plate such that the detection ram is movable with the cover plate away from or toward the placement surface, the detection ram comprising:

a metal probe; and

the lifting mechanism is used for driving the metal probe to move along a vertical direction when the cover plate covers the base body, and comprises a supporting column, a return spring sleeved on the supporting column and a shifting block connected with the metal probe, wherein the shifting block moves to drive the metal probe to move downwards along the vertical direction and compress the return spring; the metal probe comprises a pointer plate, the pointer plate comprises a guide hole, and the pointer plate is sleeved on the support column through the guide hole; the shifting block rotates to have a first position and a second position, in the first position, the shifting block supports against the pointer plate to move downwards along the vertical direction and compress the return spring, and in the second position, the return spring resets to drive the pointer plate to move upwards along the vertical direction.

2. The electrical testing fixture for display panels with narrow borders of claim 1, wherein a side of said cover plate is connected to a side of said base by a pivot, and said testing press head is connected to said side of said cover plate connected to said pivot.

3. The electrical inspection tool as claimed in claim 2 wherein the inspection indenter extends along a first direction, the first direction being parallel to the pivot axis.

4. The electrical testing fixture for narrow-bezel display panels as claimed in claim 1, wherein the mounting surface comprises a fixing structure.

5. The electrical testing fixture for display panels with narrow borders of claim 1, wherein said cover plate comprises a fixing structure.

6. The electrical testing fixture of claim 1, further comprising a tray disposed between the cover plate and the base.

7. The electrical detection fixture applied to the narrow-bezel display panel according to any one of claims 1 to 6, further comprising an electrical control unit for detecting whether the detection ram is electrified or not and a hot plug unit electrically connected with the electrical control unit.

8. An electrical testing method, characterized in that the electrical testing jig applied to the narrow-frame display panel of any one of claims 1 to 7 is used for electrically testing a display panel to be tested, comprising the following steps:

s100, placing a display panel to be detected on a placing surface;

9. The electrical detection method of claim 8, wherein when the display panel to be detected is electrified, the metal probe of the detection pressure head is electrically connected with the test pad of the display panel to be detected through locking of the hot-plug unit, and the cover plate is locked and closed with the base body.

10. The electrical detection method of claim 8, wherein the step S200 further comprises: when the cover plate is closed, the backlight switch is triggered to be opened, and when the cover plate is opened, the backlight switch is triggered to be closed.