CN105629527B - A kind of probe block, detection device and display panel testing method - Google Patents

Abstract

The invention discloses a probe block, a detection device and a display panel detection method, so as to solve the problems of high cost and unsatisfactory detection effect in the prior art in the detection mode of Drive IC combined with COF for display panel detection. The probe block includes a flexible circuit board, the flexible circuit board includes a plurality of signal lines for transmitting detection signals, and the signal lines include a first signal line and a second signal line whose one end corresponds to the line in the liquid crystal panel bonding pad one-to-one. Signal line, the other end of the first signal line is overlapped with the detection circuit board, and the other end of the second signal line is suspended; the flexible circuit board has a first patch area and a second patch area located at the non-end, and the first The line segments of the line and the second signal line located in the first patch area and the second patch area are exposed, and the exposed line segments of the first signal line and the second signal line are used for pasting the patch electrically connected by the connecting line to Electrical connection is achieved between the first signal line and the second signal line that transmit the same detection signal.

Description

A probe block, detection device and display panel detection method

technical field

The present invention relates to the field of display technology, in particular to a probe block, a detection device and a display panel detection method.

Background technique

In the manufacturing process of liquid crystal panels, the box-forming process is to laminate the finished color filter glass and array glass, and then obtain a liquid crystal panel of a specific size after cutting. In order to reduce costs, most manufacturers choose to stick polarizing film Before lighting the panel, you can check whether the LCD panel has bad points, such as bright spots or dark spots.

At present, the existing probe block design uses a special drive IC (Drive IC) combined with a chip on film (Chip OnFilm, COF) to achieve signal expansion. As shown in FIG. 1 , during the lighting inspection, the liquid crystal panel 100 is first fixed on the inspection base, and the chip on film 102 in the probe block 121 is overlapped with the bonding pad (not shown) of the liquid crystal panel 100, so that The signal lines in the chip on film are connected to the lines of the liquid crystal panel, wherein the COF refers to the die soft film that fixes the integrated circuit (Integrated Circuit, IC) on the flexible circuit board. The COF 102 includes a plurality of connecting lines 111, and the Flexible Printed Circuit Board (FPC) 101 includes a plurality of connecting lines 112. The connecting lines 111 are connected to the connecting lines 112 in one-to-one correspondence. When the liquid crystal panel is checked for lighting, The signal generator 122 connected to the FPC 101 inputs a signal to each of the connection lines 112 in the FPC 101 to light up the liquid crystal panel.

However, the current detection method requires a specific Drive IC combined with COF, so the cost is high, and the precise bonding between the Drive IC and the FPC is not ideal, which affects the lighting detection effect of the LCD panel.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a probe block, a detection device and a display panel detection method, so as to solve the problem that the detection method of a specific Drive IC combined with COF is used for the detection of the display panel in the prior art, which has high cost and unsatisfactory detection effect. question.

The purpose of this invention is to realize through the following technical solutions:

An embodiment of the present invention provides a probe block including a flexible circuit board, the flexible circuit board includes a plurality of signal lines for transmitting detection signals, the signal lines include a first signal line and a second signal line, each of the first signal lines One end of a signal line and one end of each of the second signal lines are respectively overlapped with the lines in the liquid crystal panel bonding pads in a one-to-one correspondence, the other end of the first signal line is overlapped with the detection circuit board, and the second The other end of the signal line is left floating;

The flexible circuit board has a first patch area and a second patch area located at the non-end portion, and the first signal line and the second signal line are located in the first patch area and the second patch area. The line segments in the chip area are exposed, and the exposed line segments of the first signal line and the second signal line are used to cover the patch electrically connected by the connecting line, so that the first signal line that transmits the same detection signal and the second signal line is electrically connected.

In this embodiment, the flexible circuit board of the probe block has the first patch area and the second patch that expose the first signal line and the second signal line, so that the The exposed line segment of the first signal line and the line segment of the second signal line can be directly covered with patches that are electrically connected according to predetermined requirements, so as to realize the use of the first signal line and the matching at least one of the second signals The line transmits the same detection signal, and does not need a specific Drive IC combined with COF technology, which reduces the cost; at the same time, it is connected by SMD technology, which has good continuity and improves the detection effect.

Preferably, the probe block further includes a number of first patches and a number of second patches in equal numbers, and each of the first patches is used to cover the first patch corresponding to the first patch area. On the exposed line segments of the signal lines and/or the second signal lines, each of the second patches is used to cover the first signal lines and/or the first signal lines and/or the first signal lines corresponding to the second patch area. On the exposed line segment of the second signal line;

Each of the first patches and each of the second patches are electrically connected through a connecting wire in a one-to-one correspondence, and the first patch and the second patch that are electrically connected through the same connecting wire are respectively Corresponding to one of the first signal lines and one of the second signal lines; or the first patch and the second patch that are electrically connected through the same connecting line correspond to two different first patches respectively. Two signal lines.

In this embodiment, patches corresponding to the line segment of the first signal line and the line segment of the second signal line exposed by the first patch area and the second patch are provided.

Preferably, all the first signal lines are a first signal line group, all the second signal lines are a second signal line group, and the first signal line group and the second signal line group have no intersection;

The first patch area corresponds to all the first signal lines and all the second signal lines, and the second patch area corresponds only to the second signal lines; Corresponding to the second signal lines, the second patch area corresponds to all the first signal lines and all the second signal lines.

Preferably, all the first signal lines are divided into two first signal line groups, and all the second signal lines are a second signal line group; the second signal line group is located in two of the first signal lines between groups, and have no intersection with the first signal line group;

The first patch area corresponds to all the first signal lines in the first signal line group and all the second signal lines in the second signal line group, and the second patch area corresponds to All the first signal lines in the other first signal line group and all the second signal lines in the second signal line group; or,

The first patch area corresponds to all the first signal lines and all the second signal lines, and the second patch area corresponds to only all the second signal lines.

Preferably, the length of one end of the first signal line overlapped with the detection circuit board exceeds the suspended end of the second signal line.

Preferably, the number of the second signal lines is greater than or equal to the number of the first signal lines.

Preferably, the exposed pattern of each of the signal lines in the first patch area and the second patch area is a rectangle.

Preferably, the material of the signal line is any one of copper, aluminum, platinum, gold and silver or a mixed metal of at least two of them.

The beneficial effects of the embodiments of the present invention are as follows: by making the flexible circuit board of the probe block have the first patch area and the second patch that expose the first signal line and the second signal line, Therefore, the exposed line segments of the first signal line and the line segments of the second signal line can be directly covered with patches that are electrically connected according to predetermined requirements, so that the first signal line and the matching at least one The second signal line transmits the same detection signal, and does not need a specific Drive IC combined with COF technology, which reduces the cost; at the same time, it is connected by SMD technology, which has good continuity and improves the detection effect.

An embodiment of the present invention provides a detection device, including a detection circuit board for providing detection signals and the probe block as described above.

The beneficial effects of the embodiments of the present invention are as follows: by making the flexible circuit board of the probe block have the first patch area and the second patch that expose the first signal line and the second signal line, Therefore, the exposed line segments of the first signal line and the line segments of the second signal line can be directly covered with patches that are electrically connected according to predetermined requirements, so that the first signal line and the matching at least one The second signal line transmits the same detection signal, and does not need a specific Drive IC combined with COF technology, which reduces the cost; at the same time, it is connected by SMD technology, which has good continuity and improves the detection effect.

An embodiment of the present invention provides a method for detecting a display panel, using the above-mentioned detection device, and the method includes:

Provide a number of first patches and a number of second patches in equal numbers, and attach each of the first patches to the first signal line and/or the second signal corresponding to the first patch area On the exposed line segments of the lines, each of the second patches is attached to the exposed segments of the first signal lines and/or the second signal lines corresponding to the second patch area; wherein, Each of the first patches and each of the second patches are electrically connected through a connecting wire in a one-to-one correspondence, and the first patch and the second patch that are electrically connected through the same connecting wire are respectively Corresponding to one of the first signal lines and one of the second signal lines, or, the first patch and the second patch that are electrically connected through the same connection line correspond to two different the second signal line;

A detection signal is provided to each of the first signal lines, so that the detection signal is transmitted from the first signal line to the circuit in the liquid crystal panel bonding pad where the first signal line overlaps, and the The detection signal is transmitted to at least one of the second signal lines directly or indirectly connected to the first patch or the second patch attached to the first signal line, so that the detection signal is The at least one second signal line is transmitted to the line in the liquid crystal panel bonding pad that the at least one second signal line overlaps.

The beneficial effects of the embodiments of the present invention are as follows: by making the flexible circuit board of the probe block have the first patch area and the second patch that expose the first signal line and the second signal line, Therefore, the exposed line segments of the first signal line and the line segments of the second signal line can be directly covered with patches that are electrically connected according to predetermined requirements, so that the first signal line and the matching at least one The second signal line transmits the same detection signal, and the above-mentioned probe block is used for detection, which does not require a specific Drive IC combined with COF technology, which reduces the cost; at the same time, the first signal line connected by the patch technology and all The second signal line has good continuity and improves the detection effect.

Description of drawings

FIG. 1 is a schematic structural diagram of a probe block provided by the prior art used for display panel lighting detection;

2 is a schematic structural diagram of a first probe block provided by an embodiment of the present invention;

3 is a schematic structural diagram of a set patch in a first probe block provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating that the collective patch shown in FIG. 3 is attached to the exposed line segment of the probe block shown in FIG. 2;

5 is a schematic diagram of an arrangement mode of signal lines and a patch area combination mode in a first probe block provided by an embodiment of the present invention;

6 is a schematic diagram of an arrangement mode of signal lines and a patch area combination mode in a second probe block provided by an embodiment of the present invention;

7 is a flowchart of a method for detecting a display panel according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of the direction of detection signals in a probe block according to an embodiment of the present invention.

Detailed ways

The implementation process of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

Referring to FIG. 2, an embodiment of the present invention provides a probe block including a flexible circuit board, the flexible circuit board includes a plurality of signal lines for transmitting detection signals, and the signal lines include a first signal line 1 and a second signal line 2, each of which is a first signal line 1 and a second signal line 2. One end of a signal line 1 and one end of each second signal line 2 are respectively overlapped with the lines in the liquid crystal panel bonding pad, the other end of the first signal line 1 is overlapped with the detection circuit board, and the second signal line 2 the other end of the dangling;

The flexible circuit board has a first patch area 3 and a second patch area 4 located at the non-end, and the first signal line 1 and the second signal line 2 are located in the line segment of the first patch area 3 and the second patch area exposed. For example, in FIG. 2 , the first signal line 1 is exposed in the line segment 11 of the first patch area 3, the first signal line 1 is exposed in the line segment 12 of the second patch area 4; the second signal line 2 is in the first patch area. 3. The exposed line segment 21, and the exposed line segment 22 of the second signal line 2 in the second patch area 4;

The exposed line segments of the first signal line 1 and the second signal line 2 are used for affixing the patch electrically connected by the connecting line, so as to realize the electrical connection between the first signal line 1 and the second signal line 2 that transmit the same detection signal. connect.

Since the first signal line 1 is used as the signal line for providing the detection signal, the length of the overlapping end of the first signal line 1 and the detection circuit board can exceed the floating end of the second signal line 2, which can save space.

Preferably, the number of the second signal lines 2 is greater than or equal to the number of the first signal lines 1 .

Preferably, the exposed pattern of each signal line in the first patch area 3 and the second patch area 4 is a rectangle. Of course, the exposed pattern of each signal line in the first patch area 3 and the second patch area 4 can also be other geometric shapes, such as circles, triangles, hexagons, trapezoids, etc., for the purpose of easy realization , preferably rectangular.

Preferably, the material of the first signal line 1 and the second signal line 2 is any one of copper, aluminum, platinum, gold and silver or a mixed metal of at least two of them.

In order to match the exposed line segments of each signal line (eg, the first signal line 1 and the second signal line 2 ) in the first patch area 3 and the second patch area 4 , corresponding set patches are provided. As shown in FIG. 3 , the probe block further includes a number of first patches 5 and a number of second patches 6 , and each first patch 5 is used to cover the first signal corresponding to the first patch area 3 . On the exposed line segments (eg line segment 11 and/or line segment 21 ) of line 1 and/or second signal line 2 , each second patch 6 is used to cover the first signal line 1 corresponding to the second patch area 4 and/or on the exposed line segment (eg line segment 12 and/or line segment 22) of the second signal line 2;

Each of the first patches 5 and each of the second patches 6 are electrically connected through a connecting wire 7 in a one-to-one correspondence, and the first patch 5 and the second patch 6 that are electrically connected through the same connecting wire 7 correspond to one The first signal line 1 and one second signal line 2 ; or the first patch 5 and the second patch 6 electrically connected by the same connecting line 7 respectively correspond to two different second signal lines 2 . In this embodiment, patches corresponding to the line segment of the first signal line 1 and the line segment of the second signal line 2 exposed by the first patch area 3 and the second patch, the first patch 5 and the second patch 6 are provided. A schematic diagram of the line segment of the first signal line 1 and the line segment of the second signal line 2 exposed on the first patch area 3 and the second patch is shown in FIG. 4 .

The beneficial effects of this embodiment are as follows: by making the flexible circuit board of the probe block have the first patch area 3 and the second patch area 4 exposing the first signal line 1 and the second signal line 2, the exposed first patch area 3 and the second patch area 4 are exposed. The line segment of a signal line 1 and the line segment of the second signal line 2 can be directly covered with patches that are electrically connected according to predetermined requirements, so as to realize the transmission of the same detection signal by the first signal line 1 and the matched at least one second signal line 2, There is no need for a specific Drive IC combined with COF technology, which reduces the cost; at the same time, it is connected by SMD technology, which has good continuity and improves the detection effect.

Of course, the first signal line 1 and the second signal line 2 can be arranged in various ways, and the corresponding first patch area 3 and the second patch area 4 also have groups that match the arrangement:

For example, as shown in FIG. 5, all the first signal lines 1 are divided into two first signal line groups 13, and all the second signal lines 2 are second signal line groups 23; the second signal line groups 23 are located in the two first signal line groups 23. between the signal line groups 13, and the second signal line group 23 and the first signal line group 13 have no intersection;

The first patch area 3 corresponds to all the first signal lines 1 in the first signal line 1 group and all the second signal lines 2 in the second signal line 2 group, and the second patch area 4 corresponds to another first signal line All first signal lines 1 in group 1 and all second signal lines 2 in group 2; The two patch areas 4 only correspond to all the second signal lines 2 , and details are not described herein again.

For another example, as shown in FIG. 6 , all the first signal lines 1 are the first signal line group 13 , all the second signal lines 2 are the second signal line group 23 , the first signal line group 13 and the second signal line group 23 There is no intersection; the first patch area 3 only corresponds to the second signal line 2, and the second patch area 4 corresponds to all the first signal lines 1 and all the second signal lines 2; of course, the first patch area 3 corresponds to all the first signal lines 2. One signal line 1 and all the second signal lines 2, and the second patch area 4 only corresponds to the second signal line 2, which will not be repeated here.

The arrangement of the first signal line 1 and the second signal line 2 shown in FIG. 5 and FIG. 6 above can be modified according to the needs of the arrangement of the first patch area 3 and the second patch area 4, so as to be able to Adapt to different testing needs.

The beneficial effects of the embodiments of the present invention are as follows: the flexible circuit board of the probe block has a first patch area and a second patch area exposing the first signal line and the second signal line, so that the exposed first signal line is The line segment of the first signal line and the line segment of the second signal line can be directly attached to the patch that is electrically connected according to the predetermined requirements, so as to realize the transmission of the same detection signal by the first signal line and at least one matched second signal line, without the need for a specific DriveIC combined with COF technology , which reduces the cost; at the same time, it is connected by patch technology, which has good continuity and improves the detection effect.

An embodiment of the present invention provides a detection device, including a detection circuit board for providing detection signals and the above probe block.

The beneficial effects of the embodiments of the present invention are as follows: the flexible circuit board of the probe block has a first patch area and a second patch area exposing the first signal line and the second signal line, so that the exposed first signal line is The line segment of the first signal line and the line segment of the second signal line can be directly attached to the patch that is electrically connected according to the predetermined requirements, so as to realize the transmission of the same detection signal by the first signal line and at least one matched second signal line, without the need for a specific DriveIC combined with COF technology , which reduces the cost; at the same time, it is connected by patch technology, which has good continuity and improves the detection effect.

Referring to FIG. 7 , an embodiment of the present invention provides a display panel detection method, using the above detection device, the method includes:

201. Provide a number of first patches and a number of second patches in equal numbers, and attach each first patch on the exposed segment of the first signal line and/or the second signal line corresponding to the first patch area , each second patch is attached to the corresponding first signal line and/or the exposed line segment of the second signal line in the second patch area; wherein, each first patch corresponds to each second patch one-to-one The first patch and the second patch that are electrically connected through the same connecting wire respectively correspond to a first signal wire and a second signal wire, or, through the same connecting wire The first patch and the second patch that are electrically connected correspond to two different second signal lines respectively;

202. Provide a detection signal to each of the first signal lines, so that the detection signal is transmitted from the first signal line to the circuit in the liquid crystal panel bonding pad overlapped by the first signal line, and the detection signal is transmitted to the first signal line. The first patch or the second patch attached to the signal line has at least one second signal line in a direct or indirect connection relationship, so that the detection signal is transmitted from the at least one second signal line to the at least one second signal line. Connect the circuit in the LCD panel bonding pad.

Referring to FIG. 7 , in order to describe the specific direction of the detection signal more clearly, a schematic diagram of the direction of the detection signal in the probe block covered with the collective patch shown in FIG. 4 is provided, wherein the detection signal is provided by the arrow 90 to a first A signal line 1, on the one hand, is transmitted through the first signal line 1 along the direction of arrow 91 to the circuit in the overlapped liquid crystal display panel bonding pad, and on the other hand, is transmitted through the connecting line 7 along the direction of arrow 92 to a direct electrical The connected second signal line 2 (it can also be understood as the second patch 6 on the first signal line 1 and the first patch 5 on the second signal line 2 transmit the detection signal through the connecting line 7), and then the detection The signal is transmitted through the second signal line 2 along the direction of arrow 93 to the lines in the bonding pads of the liquid crystal display panel that are overlapped, and the detection signal is transmitted through the second signal line 2 along the direction of arrow 94 and arrow 95 to another. One second signal line 2 and another second signal line 2 repeat the above-mentioned transmission of the second signal line 2 .

The beneficial effects of the embodiments of the present invention are as follows: the flexible circuit board of the probe block has a first patch area and a second patch area exposing the first signal line and the second signal line, so that the exposed first signal line is The line segment of the first signal line and the line segment of the second signal line can be directly attached to the patch that is electrically connected according to the predetermined requirements, so as to realize the transmission of the same detection signal by the first signal line and the matched at least one second signal line, and use the above-mentioned probe block for detection. , it does not need a specific Drive IC combined with COF technology, which reduces the cost; at the same time, the first signal line and the second signal line connected by SMD technology have good continuity and improve the detection effect.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A probe block comprising a flexible circuit board comprising several signal lines for transmitting detection signals, characterized in that: The signal lines include a first signal line and a second signal line, and one end of each of the first signal lines and each of the second signal lines is respectively overlapped with the lines in the liquid crystal panel bonding pads in one-to-one correspondence, so The other end of the first signal line is overlapped with the detection circuit board, and the other end of the second signal line is suspended; The flexible circuit board has a first patch area and a second patch area located at the non-end portion, and the first signal line and the second signal line are located in the first patch area and the second patch area. The line segments in the chip area are exposed, and the exposed line segments of the first signal line and the second signal line are used to cover the patch electrically connected by the connecting line, so that the first signal line that transmits the same detection signal and the second signal line is electrically connected. 2 . The probe block according to claim 1 , wherein the probe block further comprises a plurality of first patches and a plurality of second patches in equal numbers, and each of the first patches is used for sticking. 3 . On the exposed line segments of the first signal line and/or the second signal line corresponding to the first patch area, each of the second patches is used for attaching to the second patch area on the exposed line segment of the corresponding first signal line and/or the second signal line; Each of the first patches and each of the second patches are electrically connected through a connecting wire in a one-to-one correspondence, and the first patch and the second patch that are electrically connected through the same connecting wire are respectively Corresponding to one of the first signal lines and one of the second signal lines; or the first patch and the second patch that are electrically connected through the same connecting line correspond to two different first patches respectively. Two signal lines. 3. The probe block according to claim 1 or 2, wherein all the first signal lines are a first signal line group, all the second signal lines are a second signal line group, and the first signal line is a second signal line group. A signal line group has no intersection with the second signal line group; The first patch area corresponds to all the first signal lines and all the second signal lines, and the second patch area corresponds only to the second signal lines; Corresponding to the second signal lines, the second patch area corresponds to all the first signal lines and all the second signal lines. 4. The probe block according to claim 1 or 2, wherein all the first signal lines are divided into two first signal line groups, and all the second signal lines are second signal line groups; the second signal line group is located between the two first signal line groups and has no intersection with the first signal line group; The first patch area corresponds to all the first signal lines in the first signal line group and all the second signal lines in the second signal line group, and the second patch area corresponds to All the first signal lines in the other first signal line group and all the second signal lines in the second signal line group; or, The first patch area corresponds to all the first signal lines and all the second signal lines, and the second patch area corresponds to only all the second signal lines. 5 . The probe block according to claim 1 , wherein the length of one end of the first signal line overlapping with the detection circuit board exceeds the suspended end of the second signal line. 6 . 6 . The probe block of claim 1 , wherein the number of the second signal lines is greater than or equal to the number of the first signal lines. 7 . 7 . The probe block of claim 1 , wherein the exposed line segments of each of the signal lines in the first patch area and the second patch area are rectangular in shape. 8 . 8 . The probe block according to claim 1 , wherein the material of the signal line is any one of copper, aluminum, platinum, gold, and silver, or a mixed metal of at least two of them. 9 . 9 . A detection device, comprising a detection circuit board for providing detection signals, characterized in that, the detection device further comprises the probe block according to any one of claims 1 to 8 . 10. A display panel detection method, using the detection device as claimed in claim 9, wherein the method comprises: Provide a number of first patches and a number of second patches in equal numbers, and attach each of the first patches to the first signal line and/or the second signal corresponding to the first patch area On the exposed line segments of the lines, each of the second patches is attached to the exposed segments of the first signal lines and/or the second signal lines corresponding to the second patch area; wherein, Each of the first patches and each of the second patches are electrically connected through a connecting wire in a one-to-one correspondence, and the first patch and the second patch that are electrically connected through the same connecting wire are respectively Corresponding to one of the first signal lines and one of the second signal lines, or, the first patch and the second patch that are electrically connected through the same connection line correspond to two different the second signal line; A detection signal is provided to each of the first signal lines, so that the detection signal is transmitted from the first signal line to the circuit in the liquid crystal panel bonding pad where the first signal line overlaps, and the The detection signal is transmitted to at least one of the second signal lines directly or indirectly connected to the first patch or the second patch attached to the first signal line, so that the detection signal is The at least one second signal line is transmitted to the line in the liquid crystal panel bonding pad that the at least one second signal line overlaps.