CN106707575B - Liquid crystal display panel and test method thereof - Google Patents
Liquid crystal display panel and test method thereof Download PDFInfo
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- CN106707575B CN106707575B CN201710166555.7A CN201710166555A CN106707575B CN 106707575 B CN106707575 B CN 106707575B CN 201710166555 A CN201710166555 A CN 201710166555A CN 106707575 B CN106707575 B CN 106707575B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/1309—Repairing; Testing
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Abstract
The invention discloses a liquid crystal display panel and a test method thereof.A test circuit of the liquid crystal display panel comprises touch electrode blocks which are arranged in a matrix manner, and the number of the touch electrode blocks in a first electrode group and the second electrode group in any touch electrode block row is the same; the first common electrode signal line is electrically connected with the touch electrode block of the first electrode group, and the second common electrode signal line is electrically connected with the touch electrode block of the second electrode group; the touch control wiring group comprising n touch control wirings corresponds to the touch control electrode blocks one by one, and each touch control electrode block is electrically connected with the n touch control wirings in the corresponding touch control wiring group; in the same touch electrode block column, at least one first switch is arranged between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group. By the technical scheme, the waste of materials such as the control chip or the flexible circuit board in the module manufacturing process is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a liquid crystal display panel and a test method thereof.
Background
The manufacturing process of the liquid crystal display panel generally includes three processes, namely an array process, an assembly process and a module process, the test for the liquid crystal display panel is generally performed before the module process, when the liquid crystal display panel includes a plurality of touch electrode blocks arranged in a matrix, a test circuit is generally arranged to communicate a first signal line with m touch electrode blocks in a touch electrode block row and communicate a second signal line with the remaining m touch electrode blocks in the touch electrode block row, and m is a positive integer.
When invalid signals are input into the first signal line and the second signal line, the pixel units corresponding to the touch electrode block are in a bright state (or a dark state); when the data signals introduced from the data signal lines are input to the first signal lines and the second signal lines, the pixel units corresponding to the touch electrode blocks are in a dark state (or a bright state). Therefore, whether the test circuit connected with the touch electrode block is broken or not cannot be detected, and the test circuit is used for connecting the control chip or the flexible circuit board to the touch electrode block during the module manufacturing process so as to provide a control signal for the touch electrode block. Because the test circuit connected with the touch electrode block cannot be detected whether the circuit is broken or not, the circuit between the control chip or the flexible circuit board and the circuit of the touch electrode can be broken during the module manufacturing process, so that the waste of materials such as the control chip or the flexible circuit board is caused, and the manufacturing cost of the liquid crystal display panel is increased.
Disclosure of Invention
The invention provides a liquid crystal display panel and a manufacturing method thereof, which are used for detecting the open circuit condition of a test circuit connected with a touch electrode block, realizing bad interception of the test circuit before a module manufacturing process and reducing the waste of materials such as a control chip or a flexible circuit board and the like in the module manufacturing process.
In a first aspect, an embodiment of the present invention provides a liquid crystal display panel test circuit, including:
the touch electrode blocks are arranged in a matrix, and each touch electrode block in the matrix comprises a plurality of touch electrode block rows; any one touch electrode block column comprises a first electrode group and a second electrode group, and the number of the touch electrode blocks in the first electrode group is the same as that of the touch electrode blocks in the second electrode group;
a first common electrode signal line and a second common electrode signal line, wherein the first common electrode signal line is electrically connected to the touch electrode blocks in the first electrode group in each touch electrode block row, and the second common electrode signal line is electrically connected to the touch electrode blocks in the second electrode group in each touch electrode block row;
the touch electrode blocks are in one-to-one correspondence with the touch wiring groups, each touch wiring group comprises n touch wirings, each touch electrode block is electrically connected with the n touch wirings in the corresponding touch wiring group, and n is a positive integer;
in the same touch electrode block column, at least one first switch is arranged between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group, wherein i is a positive integer less than or equal to n.
In a second aspect, an embodiment of the present invention further provides a liquid crystal display panel, including the liquid crystal display panel test circuit according to the first aspect.
In a third aspect, an embodiment of the present invention further provides a method for testing a liquid crystal display panel according to the second aspect, where the liquid crystal display panel includes the liquid crystal display panel testing circuit according to the first aspect, and the method includes: controlling a first common electrode signal line to input a data signal to the touch electrode block in the first electrode group, and transmitting an invalid signal to a second common electrode signal line; only in the same touch electrode block row, the first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group is controlled to be opened so as to test whether the ith touch wire electrically connected with the touch electrode block in the second electrode group is open circuit or not;
controlling a first common electrode signal line to transmit an invalid signal, and inputting a data signal to the touch electrode block in a second electrode group by a second common electrode signal line; and only in the same touch electrode block row, the first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group is controlled to be opened so as to test whether the ith touch wire electrically connected with the touch electrode block in the first electrode group is open circuit.
The embodiment of the invention provides a liquid crystal display panel and a test method thereof.A matrix arrangement touch electrode block comprising a plurality of touch electrode block rows is arranged in a liquid crystal display panel test circuit, and the touch electrode block rows comprise a first electrode group and a second electrode group, so that the number of the touch electrode blocks in the first electrode group and the second electrode group is the same; setting a first common electrode signal line and a second common electrode signal line, so that the first common electrode signal line is electrically connected with the touch electrode blocks in the first electrode group in each touch electrode block row, and the second common electrode signal line is electrically connected with the touch electrode blocks in the second electrode group in each touch electrode block row; the method comprises the steps that a plurality of touch routing groups corresponding to touch electrode blocks one to one are arranged, each touch routing group comprises n touch routing lines, and each touch electrode block is electrically connected with the n touch routing lines in the corresponding touch routing group respectively, wherein n is a positive integer; in the same touch electrode block row, at least one first switch is arranged between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group, wherein i is a positive integer less than or equal to n, detection of the open circuit condition of the touch wires connected with the touch electrode blocks is realized, bad interception of a connecting circuit is realized before a module manufacturing process, and waste of materials such as a control chip or a flexible circuit board in the module manufacturing process is reduced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a test circuit for an lcd panel according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a method for testing a liquid crystal display panel according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the invention provides a liquid crystal display panel test circuit, which comprises touch electrode blocks arranged in a matrix, wherein the touch electrode blocks arranged in the matrix comprise a plurality of touch electrode block rows, any one touch electrode block row comprises a first electrode group and a second electrode group, and the number of the touch electrode blocks in the first electrode group is the same as that of the touch electrode blocks in the second electrode group; the touch control device comprises a first common electrode signal line and a second common electrode signal line, wherein the first common electrode signal line is electrically connected with touch control electrode blocks in a first electrode group in each touch control electrode block row, and the second common electrode signal line is electrically connected with touch control electrode blocks in a second electrode group in each touch control electrode block row; the touch control electrode block comprises a plurality of touch control routing groups which correspond to the touch control electrode blocks one by one, each touch control routing group comprises n touch control routing, each touch control electrode block is electrically connected with the n touch control routing in the corresponding touch control routing group, and n is a positive integer; in the same touch electrode block column, at least one first switch is arranged between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group, wherein i is a positive integer less than or equal to n.
The liquid crystal display panel is generally tested before the module process, if the test circuit is directly connected with the first common electrode signal line to the touch electrode block in the first electrode group in each touch electrode block row and the second common electrode signal line to the touch electrode block in the second electrode group in each touch electrode block row, when invalid signals are input to the first common electrode signal line and the second common electrode signal line or data signals are input to the first common electrode signal line and the second common electrode signal line, the pixel units corresponding to the touch electrode blocks are in a bright state or a dark state, and whether open circuit exists in the part of the connecting circuit except the part connecting the touch electrode blocks and the common electrode signal lines cannot be detected.
When the module is manufactured, the control chip or the flexible circuit board is connected to the touch electrode block, and whether the part of the connecting circuit, which is connected to the touch electrode block and the common electrode signal line, is broken or not can not be detected, so that the broken circuit possibly exists between the wires connected with the control chip or the flexible circuit board and the touch electrode block, the waste of materials such as the control chip or the flexible circuit board is caused, and the manufacturing cost of the liquid crystal display panel is increased.
The touch electrode blocks which are arranged in a matrix and comprise a plurality of touch electrode block rows are arranged in the liquid crystal display panel test circuit, the touch electrode block rows comprise a first electrode group and a second electrode group, and the number of the touch electrode blocks in the first electrode group is the same as that of the touch electrode blocks in the second electrode group; setting a first common electrode signal line and a second common electrode signal line, so that the first common electrode signal line is electrically connected with the touch electrode blocks in the first electrode group in each touch electrode block row, and the second common electrode signal line is electrically connected with the touch electrode blocks in the second electrode group in each touch electrode block row; the method comprises the steps that a plurality of touch routing groups corresponding to touch electrode blocks one to one are arranged, each touch routing group comprises n touch routing lines, and each touch electrode block is electrically connected with the n touch routing lines in the corresponding touch routing group respectively, wherein n is a positive integer; particularly, in the same touch electrode block row, at least one first switch is arranged between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group, and the touch wires connected in series with the first switch can be communicated through the first switch, so that the detection of the open circuit condition of the part of the touch wires except the touch electrode blocks connected with the common electrode signal wires is realized, the detection of the open circuit condition of the touch wires connecting the touch electrode blocks to the control chip or the flexible circuit board is also realized, the bad interception of the connecting wires is realized before the module manufacturing process, and the waste of materials such as the control chip or the flexible circuit board in the module manufacturing process is reduced.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a test circuit for a liquid crystal display panel according to an embodiment of the present invention. As shown in fig. 1, the test circuit of the liquid crystal display panel includes a matrix arrangement of touch electrode blocks 1, the matrix arrangement of touch electrode blocks 1 includes a plurality of touch electrode block columns 10, any touch electrode block column 10 includes a first electrode group 101 and a second electrode group 102, and the number of touch electrode blocks 1 in the first electrode group 101 and the second electrode group 102 is the same; the touch panel comprises a first common electrode signal line 21 and a second common electrode signal line 22, wherein the first common electrode signal line 21 is electrically connected with the touch electrode blocks 1 in the first electrode group 101 in each touch electrode block column 10, and the second common electrode signal line 22 is electrically connected with the touch electrode blocks 1 in the second electrode group 102 in each touch electrode block column 10.
A plurality of touch routing groups 3 are arranged in one-to-one correspondence with the touch electrode blocks 1, each touch electrode routing group 3 includes n touch routing lines, n is exemplarily set to be 2 in fig. 1, that is, each touch routing group 3 includes 2 touch routing lines, as shown in fig. 1, each touch electrode block 1 is electrically connected to 2 touch routing lines in the corresponding touch routing group 3. For example, the touch traces in the touch trace group 3 may be electrically connected to the corresponding touch electrode block 1 through at least one via hole 103, as shown in fig. 1, the touch traces in the touch trace group 3 may be electrically connected to the corresponding touch electrode block 1 through two via holes 103.
In the same touch electrode block row 10, at least one first switch 4 is disposed between the ith touch trace electrically connected to one touch electrode block 1 in the first electrode group 101 and the ith touch trace electrically connected to one touch electrode block 1 in the second electrode group 102. For example, as shown in fig. 1, in the same touch electrode block row 10, a first switch 41 is disposed between a first touch trace 31 electrically connected to one touch electrode block 1 in a first electrode group 101 and a first touch trace 33 electrically connected to one touch electrode block 1 in a second electrode group 102; similarly, in the same touch electrode block row 10, a first switch 42 is disposed between the first touch trace 32 electrically connected to one touch electrode block 1 in the first electrode group 101 and the first touch trace 34 electrically connected to one touch electrode block 1 in the second electrode group 102.
It should be noted that: first, fig. 1 illustrates only that, in the same touch electrode block column 10, at least one first switch 4 is disposed between the i-th touch traces electrically connected to the first touch electrode block 1 in the first electrode group 101 and the i-th touch traces electrically connected to the first touch electrode block 1 in the second electrode group 102, or at least one switch 4 is disposed between the i-th touch traces electrically connected to the first touch electrode block 1 in the first electrode group 101 and the i-th touch traces electrically connected to any other touch electrode block 1 in the second electrode group 102 in the same touch electrode block column 10, which is not limited in the embodiment of the present invention. Next, fig. 1 illustrates that the first half touch electrode blocks 1 in each touch electrode block row 10 constitute the first electrode group 101, and the remaining touch electrode blocks 1 constitute the second electrode group 102, but the touch electrode blocks 1 in each touch electrode block row 10 may also constitute the first electrode group 101 and the second electrode group 102 in other forms, as long as the number of touch electrode blocks 1 in the first electrode group 101 and the second electrode group 102 is ensured to be the same. In addition, fig. 1 only exemplarily shows a case where each touch routing group 3 includes two touch routing lines, each touch routing group 3 may include n touch routing lines, where n may be any positive integer, and the embodiment of the present invention does not limit that each touch routing group 3 includes several touch routing lines. Meanwhile, fig. 1 is only exemplary in that the first switch 4 is disposed between the touch traces 31 and 33 and between the touch traces 32 and 34, and the first switch 4 may also be disposed between the touch traces 31 and 34 and between the touch traces 32 and 33, when each touch trace group 3 includes a plurality of touch traces, as long as two touch traces electrically connected to the same first switch 4 are respectively located in the first electrode group 101 and the second electrode group 102 in the same touch electrode block column 10, which is not limited in the embodiment of the present invention.
For convenience of description, the following examples are illustrated by taking n equal to 2, and n may be any other positive integer.
Optionally, a plurality of pad groups 5 may be arranged in one-to-one correspondence to the touch routing group 3, where each pad group 5 includes n pads, and specifically, n is equal to 2; 2 pads in the pad group 5 are electrically connected to 2 touch traces in the corresponding touch trace group 3 one by one. As shown in fig. 1, the pads 51 in the pad group 5 are electrically connected to the touch traces 31 in the corresponding touch trace group 3, and the pads 52 in the pad group 5 are electrically connected to the touch traces 32 in the corresponding touch trace group 3. Similarly, the pads 53 in the pad group 5 are electrically connected to the touch traces 33 in the corresponding touch trace group 3, and the pads 54 in the pad group 5 are electrically connected to the touch traces 34 in the corresponding touch trace group 3. For example, in a module manufacturing process of a liquid crystal display panel, the pad group 5 may be used to electrically connect a control chip or a flexible circuit board, one pin of the control chip may be directly pressed and connected with the pad 51 and the pad 52 in the pad group 5, and the other pin may be directly pressed and connected with the pad 53 and the pad 54 in the pad group 5.
Optionally, a plurality of pad groups 5 are arranged in one-to-one correspondence with the touch routing group 3, and in the same touch electrode block row 10, at least one first switch may be arranged between a pad corresponding to an i-th touch routing electrically connected to one touch electrode block 1 in the first electrode group 101 and a pad corresponding to an i-th touch routing electrically connected to one touch electrode block 1 in the second electrode group. For example, as shown in fig. 1, in the same touch electrode block row 10, a first switch 41 is disposed between a pad 51 corresponding to a touch trace 31 electrically connected to one touch electrode block 1 in a first electrode group 101 and a pad 53 corresponding to a touch trace 33 electrically connected to one touch electrode block 1 in a second electrode group 102; similarly, in the same touch electrode block row 10, the first switch 42 is disposed between the pad 52 corresponding to the touch trace 32 electrically connected to one touch electrode block 1 in the first electrode group 101 and the pad 54 corresponding to the touch trace 34 electrically connected to one touch electrode block 1 in the second electrode group 102. The first switch 4 can detect the open circuit condition of any one of the touch traces 31, 32, 33 and 34 in the testing process of the liquid crystal display panel.
Alternatively, each touch electrode block 1 in the first electrode group 101 may be electrically connected to the first common electrode signal line 21 through at least one second switch 61, and each touch electrode block 1 in the second electrode group 102 may be electrically connected to the second common electrode signal line 22 through at least one third switch 62. As shown in fig. 1, each touch electrode block 1 in the first electrode group 101 is electrically connected to the first common electrode signal line 21 through the second switch 61, and each touch electrode block 1 in the second electrode group 102 is electrically connected to the second common electrode signal line 22 through the third switch 62, i.e., the second switch 61 and the third switch 62 can control whether an electrical signal is input to the touch electrode block 1 in the first electrode group 101 through the first common electrode signal line 21 or whether an electrical signal is input to the touch electrode block 1 in the second electrode group 102 through the second common electrode signal line 22.
The embodiment of the invention provides a test method of a liquid crystal display panel, which comprises the steps that touch electrode blocks 1 which are arranged in a matrix and comprise a plurality of touch electrode block arrays 10 are arranged in a test circuit of the liquid crystal display panel, each touch electrode block array 10 comprises a first electrode group 101 and a second electrode group 102, and the number of the touch electrode blocks 1 in the first electrode group 101 is the same as that of the touch electrode blocks 1 in the second electrode group 102; arranging a first common electrode signal line 21 and a second common electrode signal line 22, so that the first common electrode signal line 21 is electrically connected with the touch electrode blocks 1 in the first electrode group 101 in each touch electrode block row 10, and the second common electrode signal line 22 is electrically connected with the touch electrode blocks 1 in the second electrode group 102 in each touch electrode block row 10; a plurality of touch routing groups 3 which correspond to the touch electrode blocks 1 one by one are arranged, each touch routing group 3 comprises n touch routing lines, and each touch electrode block 1 is electrically connected with the n touch routing lines in the corresponding touch routing group 3 respectively, wherein n is a positive integer; particularly, in the same touch electrode block row 10, at least one first switch 4 is arranged between the i-th touch wires electrically connected with one touch electrode block 1 in the first electrode group 101 and the i-th touch wires electrically connected with one touch electrode block 1 in the second electrode group 102, and the touch wires connected in series with the first switch 4 can be communicated through the first switch 4, so that the detection of the open circuit condition of the part of the touch wires except the touch electrode block 1 connected with the common electrode signal line is realized, the detection of the open circuit condition of the touch wires connecting the touch electrode blocks 1 to a control chip or a flexible circuit board is also realized, the bad interception of the connecting wires is realized before the module manufacturing process, and the waste of materials such as the control chip or the flexible circuit board in the module manufacturing process is reduced.
On the basis of the foregoing embodiments, an lcd panel according to an embodiment of the present invention includes the lcd panel test circuit in the foregoing embodiments, so that the lcd panel according to an embodiment of the present invention also has the beneficial effects described in the foregoing embodiments, and further description thereof is omitted.
Optionally, the liquid crystal display panel further includes a plurality of data signal lines, at least one of the data signal lines is electrically connected to the first common electrode signal line 21, and is configured to provide a data signal to the first common electrode signal line 21; at least one data signal line is electrically connected to the second common electrode signal line 22 for supplying a data signal to the second common electrode signal line 22.
When the liquid crystal display panel displays, the data signal line is electrically connected with the pixel electrode to provide a data signal for the corresponding pixel electrode, at the moment, a common voltage signal is provided on the common electrode, liquid crystal molecules deflect under the action of an electric field formed between the pixel electrode and the common electrode, the display function of the liquid crystal display panel is realized, and the common electrode can be reused as a touch electrode. It should be noted that, the liquid crystal display panel in the embodiment of the present invention may be a liquid crystal display panel in a normally bright mode, and may also be a liquid crystal display panel in a normally dark mode, for the liquid crystal display panel in the normally bright mode, when an electric field exists between the pixel electrode and the touch electrode (common electrode), the arrangement directions of the liquid crystal molecules are all the same as the direction of the electric field, and the liquid crystal molecules are not optically rotated, because the polarized light directions of the polarizing plates on both sides of the liquid crystal molecules are perpendicular to each other in the liquid crystal display panel in the normally bright mode, the pixel unit corresponding to the pixel electrode is in a dark state; when no electric field exists between the pixel electrode and the touch electrode, the pixel unit corresponding to the pixel electrode is in a bright state. For a normally dark mode liquid crystal display panel, the polarization directions of the polarizing films on two sides of the liquid crystal molecules are parallel to each other, and when an electric field exists between a pixel electrode and a touch electrode (a common electrode), a pixel unit corresponding to the pixel electrode is in a bright state; when no electric field exists between the pixel electrode and the touch electrode, the pixel unit corresponding to the pixel electrode is in a dark state. For convenience of description, the liquid crystal display panel in the normally dark mode is taken as an example to illustrate, and it should be understood by those skilled in the art that the bright state and the dark state of the pixel unit in the embodiment of the present invention are opposite.
At the detection stage of the liquid crystal display panel, the data signal lines still provide data signals for the pixel electrodes, at this time, at least one data signal line can be electrically connected with the first common electrode signal line so as to provide the data signals for the first common electrode signal line, and the first common electrode signal line is electrically connected with the corresponding touch electrode block through the touch wiring; or at least one data signal line is electrically connected with the second common electrode signal line to provide data signals for the second common electrode signal line, and the second common electrode signal line is electrically connected with the corresponding touch electrode block through a touch wiring, so that the touch electrode block and the pixel electrode are both data signals, no voltage difference exists between the touch electrode block and the pixel electrode, namely, an electric field for controlling the deflection of liquid crystal molecules between the touch electrode block and the pixel electrode cannot be formed between the touch electrode block and the pixel electrode, namely, the pixel unit corresponding to the touch electrode block is in a dark state; when the first common electrode signal line cannot provide a data signal to the corresponding touch electrode block, or the second common electrode signal line cannot provide a data signal to the corresponding touch electrode block, the liquid crystal molecules deflect under the action of an electric field formed between the pixel electrode and the touch electrode block, that is, the pixel unit corresponding to the touch electrode block is in a bright state.
Fig. 2 is a schematic flow chart of a method for testing a liquid crystal display panel according to an embodiment of the present invention, where the liquid crystal display panel includes a liquid crystal display panel test circuit according to the above embodiment, and the technical solution of this embodiment may be applied to a scenario where a liquid crystal display panel needs to be tested, and may be implemented by the liquid crystal display panel test circuit according to the embodiment of the present invention. The liquid crystal display panel testing method comprises the following steps:
s110, the first common electrode signal line is controlled to input data signals to the touch electrode blocks in the first electrode group, and the second common electrode signal line transmits invalid signals.
The data signal input from the first common electrode signal line 21 to the touch electrode block 1 in the first electrode group 101 may be provided by a data signal line electrically connected to the pixel electrode in the liquid crystal display panel. For example, as shown in fig. 1, the second switch 61 may be turned on to control the data signal line connected to the pixel electrode to supply the data signal to the touch electrode block 1 electrically connected to the first common electrode signal line 21 through the first common electrode signal line 21. The second common electrode signal line 22 may be suspended to allow an inactive signal to be transmitted on the second common electrode signal line 22.
And S120, only controlling a first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group to be opened in the same touch electrode block row.
If n is equal to 1, that is, each touch trace group 3 only includes 1 touch trace, the touch trace electrically connected to one touch electrode block 1 in the first electrode group 101 in the same touch electrode block row 10 is controlled to open the first switch between the touch traces electrically connected to one touch electrode block 1 in the second electrode group 102.
If n is greater than 1, it is exemplarily set that n is equal to 2, that is, each touch trace group 3 includes 2 touch traces, as shown in fig. 1, the first switch 41 between the first touch trace 31 electrically connected to one touch electrode block 1 in the first electrode group 101 and the first touch trace 33 electrically connected to one touch electrode block 1 in the second electrode group 102 in the same touch electrode block row 10 is controlled to be turned on, and all the first switches 42 are turned off. Or in the same touch electrode block column 10, the second touch trace 32 electrically connected to one touch electrode block 1 in the first electrode group 101 and the first switch 42 between the second touch traces 34 electrically connected to one touch electrode block 1 in the second electrode group 102 are turned on, and all the first switches 41 are turned off. Optionally, when any first switch corresponding to any touch electrode block column 10 is turned on, the first switches corresponding to other touch electrode block columns 10 may be turned off. Optionally, one first switch corresponding to each of the at least two touch electrode block rows 10 may be turned on simultaneously.
S130, testing whether the ith touch wire electrically connected with the touch electrode block in the second electrode group is open circuit.
Optionally, whether the ith touch trace electrically connected to the touch electrode block 1 in the second electrode group 102 is open may be tested according to the brightness of the pixel unit corresponding to the touch electrode block 1 in the second electrode group 102.
Optionally, if the pixel units corresponding to the touch electrode blocks 1 in the first electrode group 101 and the second electrode group 102 are in a dark state, it is determined that the ith touch trace electrically connected to the touch electrode block 1 in the second electrode group 102 is normal; if the pixel unit corresponding to the touch electrode block 1 in the first electrode group 101 is in a dark state and the pixel unit corresponding to the touch electrode block in the second electrode group 102 is in a bright state, it is determined that the ith touch trace electrically connected to the touch electrode block 1 in the second electrode group 102 is open.
For example, as shown in fig. 1, in the same touch electrode block column 10, the first switch 41 between the first touch trace 31 electrically connected to one touch electrode block 1 in the first electrode group 101 and the first touch trace 33 electrically connected to one touch electrode block 1 in the second electrode group 102 is controlled to be turned on, and all the first switches 42 are controlled to be turned off. Because a data signal is input on the first common electrode signal line 21, if the pixel units corresponding to the touch electrode blocks 1 in the first electrode group 101 and the second electrode group 102 are both in a dark state, because the data signal line provides a data signal to the pixel electrodes electrically connected therewith, only when the pixel electrodes are all data signals on the touch electrode blocks 1 electrically connected with the first common electrode signal line 21, the pixel units corresponding to the touch electrode blocks 1 are in a dark state, which proves that the data signal input on the first common electrode signal line 21 can be transmitted to the corresponding touch electrode blocks 1 in the second electrode group 102 through the touch wirings 31, 33, and then it is determined that the touch wiring 31 electrically connected with the touch electrode blocks 1 in the second electrode group 102 is not disconnected, and the touch wiring 33 electrically connected with the touch electrode blocks 1 in the second electrode group 102 is not disconnected; if the pixel unit corresponding to the touch electrode block 1 in the first electrode group 101 is in a dark state, and the pixel unit corresponding to the touch electrode block 1 in the second electrode group 102 is in a bright state, only when the signals on the touch electrode block 1 electrically connected between the pixel electrode and the first common electrode signal line 21 are different, the pixel unit corresponding to the touch electrode block 1 is in a bright state, which proves that the data signal input on the first common electrode signal line 21 cannot be transmitted to the touch electrode block 1 in the second electrode group 102 through the touch trace 33, and it is determined that the touch trace 33 electrically connected to the touch electrode block 1 in the second electrode group 102 is possibly open-circuited.
For example, as shown in fig. 1, in the same touch electrode block column 10, the second touch trace 32 electrically connected to one touch electrode block 1 in the first electrode group 101 is controlled to be opened, and the first switches 42 between the second touch traces 34 electrically connected to one touch electrode block 1 in the second electrode group 102 are controlled to be opened, and all the first switches 41 are controlled to be closed. Because a data signal is input on the first common electrode signal line 21, if the pixel units corresponding to the touch electrode blocks 1 in the first electrode group 101 and the second electrode group 102 are both in a dark state, it is proved that the data signal input on the first common electrode signal line 21 can be transmitted to the corresponding touch electrode blocks 1 in the second electrode group 102 through the touch traces 32 and 34, and it is determined that there is no open circuit in the second touch trace 32 electrically connected to one touch electrode block 1 in the first electrode group 101, and there is no open circuit in the touch trace 34 electrically connected to the touch electrode block 1 in the second electrode group 102; if the pixel unit corresponding to the touch electrode block 1 in the first electrode group 101 is in a dark state and the pixel unit corresponding to the touch electrode block 1 in the second electrode group 102 is in a bright state, it is proved that the data signal input on the first common electrode signal line 21 cannot be transmitted to the touch electrode block 1 in the second electrode group 102 through the touch trace 34, and it is determined that the touch trace 34 electrically connected to the touch electrode block 1 in the second electrode group 102 is possibly open-circuited.
S140, the first common electrode signal line is controlled to transmit an invalid signal, and the second common electrode signal line inputs a data signal to the touch electrode block in the second electrode group.
For example, as shown in fig. 1, the third switch 62 may be turned on to control the data signal line connected to the pixel electrode to supply the data signal to the touch electrode block 1 electrically connected to the second common electrode signal line 22 through the second common electrode signal line 22. The first common electrode signal line 21 may be left floating, so that an invalid signal is transmitted on the first common electrode signal line.
S150, only controlling a first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group to be opened in the same touch electrode block row.
S160, testing whether the ith touch wire electrically connected with the touch electrode block in the first electrode group is open circuit.
Optionally, whether the ith touch trace electrically connected to the touch electrode block in the first electrode group is open-circuited may be tested according to the brightness of the pixel unit corresponding to the touch electrode block in the first electrode group.
Optionally, if the pixel units corresponding to the touch electrode blocks 1 in the first electrode group 101 and the second electrode group 102 are both in a dark state, it is determined that the ith touch trace electrically connected to the touch electrode block 1 in the first electrode group 101 is normal; if the pixel unit corresponding to the touch electrode block 1 in the first electrode group 101 is in a bright state and the pixel unit corresponding to the touch electrode block in the second electrode group 102 is in a dark state, it is determined that the ith touch trace electrically connected to the touch electrode block in the first electrode group 101 is open.
For example, as shown in fig. 1, in the same touch electrode block column 10, the first switch 41 between the first touch trace 31 electrically connected to one touch electrode block 1 in the first electrode group 101 and the first touch trace 33 electrically connected to one touch electrode block 1 in the second electrode group 102 is controlled to be turned on, and all the first switches 42 are controlled to be turned off. Because the data signal is input on the second common electrode signal line 22, if the pixel units corresponding to the touch electrode blocks 1 in the first electrode group 101 and the second electrode group 102 are both in a dark state, it is proved that the data signal input on the second common electrode signal line 22 can be transmitted to the corresponding touch electrode blocks 1 in the first electrode group 101 through the touch traces 33, 31, and it is determined that there is no open circuit in the touch trace 31 electrically connected to the touch electrode block 1 in the first electrode group 101, and there is no open circuit in the touch trace 33 electrically connected to the touch electrode block 1 in the second electrode group 102; if the pixel unit corresponding to the touch electrode block 1 in the first electrode group 101 is in a bright state and the pixel unit corresponding to the touch electrode block 1 in the second electrode group 102 is in a dark state, it is proved that the data signal input on the second common electrode signal line 22 cannot be transmitted to the touch electrode block 1 in the first electrode group 101 through the touch trace 31, and it is determined that the touch trace 31 electrically connected to the touch electrode block 1 in the first electrode group 101 is possibly open-circuited.
For example, as shown in fig. 1, in the same touch electrode block column 10, the second touch trace 32 electrically connected to one touch electrode block 1 in the first electrode group 101 is controlled to be opened, and the first switches 42 between the second touch traces 34 electrically connected to one touch electrode block 1 in the second electrode group 102 are controlled to be opened, and all the first switches 41 are controlled to be closed. Because the data signal is input on the second common electrode signal line 22, if the pixel units corresponding to the touch electrode blocks 1 in the first electrode group 101 and the second electrode group 102 are both in a dark state, it is proved that the data signal input on the second common electrode signal line 22 can be transmitted to the corresponding touch electrode blocks 1 in the first electrode group 101 through the touch traces 34, 32, and it is determined that the touch trace 32 electrically connected to the touch electrode block 1 in the first electrode group 101 is not broken and the touch trace 34 electrically connected to the touch electrode block 1 in the second electrode group 102 is not broken; if the pixel unit corresponding to the touch electrode block 1 in the first electrode group 101 is in a bright state and the pixel unit corresponding to the touch electrode block 1 in the second electrode group 102 is in a dark state, it is proved that the data signal input on the second common electrode signal line 22 cannot be transmitted to the touch electrode block 1 in the first electrode group 101 through the touch trace 32, and it is determined that the touch trace 32 electrically connected to the touch electrode block 1 in the first electrode group 101 is possibly open-circuited.
The embodiment of the invention provides a liquid crystal display panel testing method, which comprises the steps of inputting data signals to a touch electrode block in a first electrode group by controlling a first common electrode signal line, and transmitting invalid signals to a second common electrode signal line; and only controlling a first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group to be opened in the same touch electrode block row so as to test whether the ith touch wire electrically connected with the touch electrode block in the second electrode group is open circuit. The first common electrode signal line is controlled to transmit an invalid signal, and the second common electrode signal line inputs a data signal to the touch electrode block in the second electrode group; and only controlling a first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group to be opened in the same touch electrode block row so as to test whether the ith touch wire electrically connected with the touch electrode block in the first electrode group is open circuit. The detection of the open circuit condition of the part of the touch wiring, which is connected with the touch electrode block 1 and the public electrode signal wire, is realized, the detection of the open circuit condition of the touch wiring, which is connected with the touch electrode block 1 to a control chip or a flexible circuit board, is also realized, the bad interception of the connection circuit is realized before the module manufacture procedure, and the waste of materials such as the control chip or the flexible circuit board in the module manufacture procedure is reduced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (7)
1. A liquid crystal display panel, comprising:
the touch electrode blocks are arranged in a matrix, and each touch electrode block in the matrix comprises a plurality of touch electrode block rows; any one touch electrode block column comprises a first electrode group and a second electrode group, and the number of the touch electrode blocks in the first electrode group is the same as that of the touch electrode blocks in the second electrode group;
a first common electrode signal line and a second common electrode signal line, wherein the first common electrode signal line is electrically connected to the touch electrode blocks in the first electrode group in each touch electrode block row, and the second common electrode signal line is electrically connected to the touch electrode blocks in the second electrode group in each touch electrode block row;
the touch electrode blocks are in one-to-one correspondence with the touch wiring groups, each touch wiring group comprises n touch wirings, each touch electrode block is electrically connected with the n touch wirings in the corresponding touch wiring group, and n is a positive integer;
in the same touch electrode block column, at least one first switch is arranged between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group, wherein i is a positive integer less than or equal to n;
the liquid crystal display panel comprises a plurality of data signal lines, at least one of the data signal lines is electrically connected with the first common electrode signal line and is used for providing data signals for the first common electrode signal line;
at least one data signal line is electrically connected with the second common electrode signal line and used for providing the data signal for the second common electrode signal line;
the touch control wiring group comprises a plurality of pad groups which are in one-to-one correspondence with the touch control wiring groups, each pad group comprises n pads, and the n pads in each pad group are electrically connected with the n touch control wirings in the corresponding touch control wiring group one by one;
n is larger than 1, and the common electrode is reused as a touch electrode.
2. The lcd panel of claim 1, wherein in a same row of touch electrode blocks, at least one first switch is disposed between a pad corresponding to an i-th touch trace electrically connected to one touch electrode block in the first electrode group and a pad corresponding to an i-th touch trace electrically connected to one touch electrode block in the second electrode group.
3. The liquid crystal display panel according to claim 1, wherein each of the touch electrode blocks in the first electrode group is electrically connected to the first common electrode signal line through at least one second switch, and each of the touch electrode blocks in the second electrode group is electrically connected to the second common electrode signal line through at least one third switch.
4. A test method for testing the liquid crystal display panel according to any one of claims 1 to 3, the test method comprising:
controlling a first common electrode signal line to input a data signal to the touch electrode block in the first electrode group, and transmitting an invalid signal to a second common electrode signal line; only in the same touch electrode block row, the first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group is controlled to be opened so as to test whether the ith touch wire electrically connected with the touch electrode block in the second electrode group is open circuit or not;
controlling a first common electrode signal line to transmit an invalid signal, and inputting a data signal to the touch electrode block in a second electrode group by a second common electrode signal line; and only in the same touch electrode block row, the first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group is controlled to be opened so as to test whether the ith touch wire electrically connected with the touch electrode block in the first electrode group is open circuit.
5. The method according to claim 4, wherein the controlling to open the first switch between an i-th touch trace electrically connected to one touch electrode block in the first electrode group and an i-th touch trace electrically connected to one touch electrode block in the second electrode group only in the same touch electrode block column includes:
if n is greater than 1, only controlling the first switch between the ith touch wire electrically connected with one touch electrode block in the first electrode group and the ith touch wire electrically connected with one touch electrode block in the second electrode group to be opened in the same touch electrode block row, and switching off the rest first switches.
6. The method according to claim 4, wherein the testing whether an ith touch trace electrically connected to the touch electrode block in the second electrode group is open circuit includes:
testing whether the ith touch wire electrically connected with the touch electrode block in the second electrode group is open circuit according to the brightness of the pixel unit corresponding to the touch electrode block in the second electrode group;
the testing whether the ith touch wire electrically connected with the touch electrode block in the first electrode group is open-circuited comprises:
and testing whether the ith touch wire electrically connected with the touch electrode block in the first electrode group is open circuit according to the brightness of the pixel unit corresponding to the touch electrode block in the first electrode group.
7. The method according to claim 6, wherein the testing whether an ith touch trace electrically connected to the touch electrode block in the second electrode group is open circuit includes:
if the pixel units corresponding to the touch electrode blocks in the first electrode group and the second electrode group are in a dark state, judging that the ith touch wire electrically connected with the touch electrode blocks in the second electrode group is normal; if the pixel unit corresponding to the touch electrode block in the first electrode group is in a dark state and the pixel unit corresponding to the touch electrode block in the second electrode group is in a bright state, determining that the ith touch wire electrically connected with the touch electrode block in the second electrode group is open-circuited;
the testing whether the ith touch wire electrically connected with the touch electrode block in the first electrode group is open-circuited comprises:
if the pixel units corresponding to the touch electrode blocks in the first electrode group and the second electrode group are in a dark state, judging that the ith touch wire electrically connected with the touch electrode blocks in the first electrode group is normal; and if the pixel unit corresponding to the touch electrode block in the first electrode group is in a bright state and the pixel unit corresponding to the touch electrode block in the second electrode group is in a dark state, judging that the ith touch wire electrically connected with the touch electrode block in the first electrode group is broken.
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| CN108037608A (en) * | 2018-01-02 | 2018-05-15 | 京东方科技集团股份有限公司 | Array base palte, touch-control display panel and display device |
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