CN112416174B - Touch display panel light leakage analysis method, touch display panel and manufacturing method - Google Patents
Touch display panel light leakage analysis method, touch display panel and manufacturing method Download PDFInfo
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- CN112416174B CN112416174B CN202011342959.5A CN202011342959A CN112416174B CN 112416174 B CN112416174 B CN 112416174B CN 202011342959 A CN202011342959 A CN 202011342959A CN 112416174 B CN112416174 B CN 112416174B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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Abstract
The invention discloses a light leakage analysis method of a touch display panel, which comprises the following steps: step S1: lightening the touch display panel to display a black picture; step S2: sequentially cutting off various signal lines in the touch display panel, observing whether light leakage points of the touch display panel disappear after a certain signal line is cut off, and judging that the generation of the light leakage points is related to the signal line if the light leakage points disappear; and step S3: and analyzing the position of the interference electric field generated on the signal line related to the generation of the light leakage points according to the positions of the light leakage points and the film layer structure of the touch display panel. The touch display panel light leakage analysis method can quickly and accurately analyze the position of the touch display panel where the interference electric field is generated. The invention also discloses a touch display panel and a manufacturing method.
Description
Technical Field
The invention relates to a display technology, in particular to a touch display panel light leakage analysis method, a touch display panel and a manufacturing method.
Background
Nowadays, touch display panels are becoming more popular, however, in practical use, it is often found that the touch display panels have a light leakage phenomenon, which affects the display effect.
The touch display panel often generates an interference electric field due to alignment deviation or other structural defects between the touch layer and the TFT layer, and a part of liquid crystal molecules rotates due to interference of the interference electric field, resulting in light leakage. In the prior art, in order to solve the problem of light leakage, a common method is to compensate for the deviation of the touch layer, or to increase the line width of the black matrix on the color film substrate to block the light leakage, if the deviation compensation of the touch layer is adopted, the edge area of the substrate becomes smaller, the process difficulty of edge routing is increased, and if the deviation compensation of the touch layer is adopted, the transmittance of the product is influenced.
In addition, if the light shielding property of the metal circuit on the array substrate is to be improved, the array substrate needs to be designed in combination with a specific product, because the array substrate mainly plays a role in driving display, for TN and VA products, the number of film layers on the array substrate is relatively small, the change is relatively easy, the changed result is relatively easy to judge and predict, and other risks may exist. However, for IPS and LTPS products, the number of layers on the array substrate is large, and "pulling one layer to move the whole body" is easy, and the change and improvement needs to be comprehensively evaluated and comprehensively considered, and even this is likely to cause missing items, which causes unexpected results and delays in improvement.
Disclosure of Invention
In order to solve the above-mentioned deficiencies of the prior art, the present invention provides a method for analyzing light leakage of a touch display panel, which can quickly and accurately analyze a position of the touch display panel where an interference electric field is generated.
The invention also provides a touch display panel and a manufacturing method.
The technical problem to be solved by the invention is realized by the following technical scheme:
a touch display panel light leakage analysis method comprises the following steps:
step S1: lightening the touch display panel to display a black picture;
step S2: sequentially cutting off various signal lines in the touch display panel, observing whether light leakage points of the touch display panel disappear after a certain signal line is cut off, and judging that the generation of the light leakage points is related to the signal line if the light leakage points disappear;
and step S3: and analyzing the position of the interference electric field generated on the signal line related to the generation of the light leakage points according to the positions of the light leakage points and the film layer structure of the touch display panel.
Further, after determining that the generation of the light leakage spot is related to a certain type of signal line in step S2, the method further includes: and verifying the judgment result.
Further, the method for verifying the determination result comprises the following steps: different voltage signals are sequentially input into a certain type of signal line which is determined to be related, constant voltage signals are input into other types of signal lines, then the brightness change of the light leakage points is observed, and if the brightness of the light leakage points changes, the verification is passed.
Furthermore, the various signal lines in the touch display panel include scan lines, data lines, and touch lines.
Further, in step 2, laser is used to sequentially cut off various signal lines in the touch display panel.
A touch display panel comprises an array substrate including a plurality of first and second touch sensing electrodes,
the pixel structure comprises a plurality of scanning lines and a plurality of data lines, wherein the scanning lines and the data lines are mutually crossed and insulated to define a plurality of sub-pixel regions;
the pixel electrodes are arranged in the sub-pixel areas defined by the scanning lines and the data lines and are respectively connected with the corresponding scanning lines and the corresponding data lines;
the touch control device comprises a plurality of touch control lines and a plurality of touch control electrodes, wherein the touch control electrodes are respectively connected with corresponding touch control lines, each touch control electrode comprises a touch control area and a shielding area which are connected, the touch control area is covered above at least one sub-pixel area in an insulating mode, and the shielding area is covered above at least one scanning line in an insulating mode.
Furthermore, the shielding region covers the next scanning line adjacent to the shielding region in an insulating manner.
Further, the shielding region extends and protrudes above the scan line toward the sub-pixel region of an adjacent column.
Further, the array substrate further includes:
and the thin film transistors connect the corresponding pixel electrodes to the corresponding scanning lines and the corresponding data lines.
A manufacturing method of a touch display panel comprises the following steps of manufacturing an array substrate:
step 100: sequentially manufacturing a gate layer, a gate insulating layer and an active layer on a substrate, wherein the gate layer comprises a plurality of scanning lines and a plurality of gates, the gates are connected with the corresponding scanning lines, and the active layer comprises a silicon island which is positioned on the gate insulating layer and corresponds to the upper part of the gates;
step 200: manufacturing a source drain layer, wherein the source drain layer comprises data lines, a source electrode, a drain electrode and touch lines, the data lines are positioned on the gate insulating layer and are mutually crossed and insulated with the scanning lines to define a plurality of sub-pixel regions, the source electrode is connected with the corresponding data lines and is positioned on one side of the silicon island, the drain electrode is positioned on the other side of the silicon island and is separated from the source electrode, and the touch lines are parallel to the data lines and are respectively positioned on two sides of the corresponding sub-pixel regions;
step 300: manufacturing a first insulating layer, and forming a first via hole on the first insulating layer at a position corresponding to the touch line,
step 400: manufacturing a touch electrode layer, wherein the touch electrode layer comprises a plurality of touch electrodes, the touch electrodes are connected with corresponding touch lines through first via holes in the first insulating layer, the touch electrodes comprise touch areas and shielding areas which are connected, the touch areas are covered above at least one sub-pixel area in an insulating mode, and the shielding areas are covered above at least one scanning line in an insulating mode;
step 500: manufacturing a second insulating layer, and forming second via holes in the positions, corresponding to the drain electrodes, of the first insulating layer and the second insulating layer;
step 600: and manufacturing a pixel electrode layer which comprises a plurality of pixel electrodes, wherein the pixel electrodes are positioned in the corresponding sub-pixel regions and are connected with the corresponding drain electrodes through second through holes on the first insulating layer and the second insulating layer.
The invention has the following beneficial effects: the touch display panel light leakage analysis method can quickly and accurately analyze the position of the touch display panel where the interference electric field is generated.
Drawings
Fig. 1 is a schematic diagram of a light leakage spot on a touch display panel in the prior art;
FIG. 2 is a block diagram of a touch display panel light leakage analyzing method according to the present invention;
fig. 3 is a schematic view of a touch display panel according to the present invention;
fig. 4 is a block diagram illustrating a manufacturing method of a touch display panel according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples.
Example one
As shown in fig. 2, a method for analyzing light leakage of a touch display panel includes the following steps:
step S1: and lightening the touch display panel to display a black picture.
In step S1, the touch display panel is placed on a light emitting surface of a backlight, the backlight is then turned on to illuminate the touch display panel, and the touch display panel is then driven to display a black image so as to observe a light leakage point.
When the touch display panel is driven to display a black image, light emitted by the backlight source theoretically cannot transmit through the touch display panel, but due to the existence of the interference electric field, part of liquid crystal molecules in the touch display panel are interfered by the interference electric field to rotate, so that part of light can penetrate through the touch display panel to form light leakage points.
Step S2: and sequentially cutting off various signal lines in the touch display panel, observing whether the light leakage points of the touch display panel disappear after a certain signal line is cut off, and judging that the generation of the light leakage points is related to the signal line if the light leakage points disappear.
The touch display panel comprises a color film substrate of an array substrate which is relatively boxed, and liquid crystal molecules are filled between the array substrate and the color film substrate; the array substrate is provided with a plurality of scanning lines 11, a plurality of data lines 21 and a plurality of pixel electrodes, the scanning lines 11 and the data lines 21 are mutually crossed and insulated to define a plurality of sub-pixel regions, and the pixel electrodes are arranged in the sub-pixel regions defined by the scanning lines 11 and the data lines 21 and are respectively connected with the corresponding scanning lines 11 and the corresponding data lines 21; the color film substrate is provided with a black matrix used for defining a plurality of sub-pixel regions, a plurality of R color resistors, a plurality of G color resistors and a plurality of B color resistors, the R color resistors, the G color resistors and the B color resistors are all arranged in the sub-pixel regions defined by the black matrix, each R color resistor, each G color resistor and each B color resistor respectively correspond to one pixel electrode, one R color resistor and the corresponding pixel electrode thereof form one R sub-pixel, one G color resistor and the corresponding pixel electrode thereof form one G sub-pixel, one B color resistor and the corresponding pixel electrode thereof form one B sub-pixel, and the adjacent R sub-pixel, the G sub-pixel and the B sub-pixel form one RGB pixel unit.
The array substrate of the touch display panel is further provided with a plurality of touch lines 24 and a plurality of touch electrodes 3, the touch electrodes 3 are respectively connected with the corresponding touch lines 24, and the touch electrodes 3 are covered above at least one sub-pixel region in an insulating manner.
In step 2, at least one scanning line 11 may be cut off first, and then whether the light leakage spots on the touch display panel partially disappear is observed, if a part of the light leakage spots disappear, it is determined that the generation of the light leakage spots is related to the scanning line 11, and if no light leakage spot disappears, it is determined that the generation of the light leakage spots is not related to the scanning line 11; cutting at least one data line 21, observing whether the light leakage points on the touch display panel partially disappear, if partial light leakage points disappear, judging that the generation of the light leakage points is related to the data line 21, and if no light leakage points disappear, judging that the generation of the light leakage points is not related to the data line 21; and finally, cutting off at least one touch line 24, observing whether the light leakage points on the touch display panel partially disappear, if partial light leakage points disappear, judging that the generation of the light leakage points is related to the touch line 24, and if no light leakage points disappear, judging that the generation of the light leakage points is not related to the touch line 24.
In this embodiment, when the scanning lines 11 are cut off, the light leakage spots on the touch display panel corresponding to the cut scanning lines 11 disappear, and when the data lines 21 and the touch lines 24 are cut off, no light leakage spots on the touch display panel disappear, so that it is determined that the light leakage spots are generated in relation to the scanning lines 11, and not in relation to the data lines 21 and the touch lines 24.
In step 2, various signal lines in the touch display panel may be cut off in sequence by, but not limited to, laser.
Preferably, in step S2, after determining that the generation of the light leakage spot is related to a certain type of signal line, the method further includes: and verifying the judgment result.
The method for verifying the judgment result comprises the following steps: different voltage signals are sequentially input into a certain type of signal line which is judged to be related, constant voltage signals are input into other types of signal lines, then the brightness change of the light leakage points is observed, and if the brightness of the light leakage points changes, the verification is passed.
In this embodiment, the scan line 11 is determined to be related to the generation of the light leakage, so as shown in table 1 below, when performing the verification, the scan line 11 (GATE) is sequentially inputted with +15V, +10V, +8V, 0V and-8V voltage signals, the data line 21 (SD) and the touch line 24 (TP) are inputted with a constant 0V voltage signal, and then the brightness change of the light leakage is observed, and it is found that the brightness of the light leakage changes with the voltage change of the scan line 11, which indicates that the signal in the scan line 11 interferes with the liquid crystal molecules to cause the light leakage problem, and the brightness of the light leakage is positively related to the voltage difference between the scan line 11 and the data line 21/touch line 24.
Further, as shown in table 2 below, voltage signals of +15V, +10V, +8V, 0V, and-8V are sequentially input to the scanning line 11 (GATE), voltage signals of 0V, +1V, and ± 5V are sequentially input to the data line 21 (SD), a constant voltage signal of 0V is input to the touch line 24 (TP), and then a change in luminance of the light leakage spot is observed, and it is found that the luminance of the light leakage spot does not necessarily change with the change in the voltage difference between the scanning line 11 and the data line 21, and particularly, when +1V and-1V are input to the data line 21, the luminance of the light leakage spot does not change although the voltage difference between the scanning line 11 and the data line 21 is different, and thus it is possible to exclude the relationship between the luminance of the light leakage spot and the voltage difference between the scanning line 11 and the data line 21. When different voltage signals are input into the data lines 21, the brightness of the light leakage points changes because the brightness of a display screen influences the observation of the light leakage points, and when the voltage signals in the data lines 21 are higher, the screen brightness of the touch display panel is higher, the contrast with the light leakage points is lower, and the light leakage points and a normal screen are difficult to distinguish during observation.
Via step 2 above it can be finally determined: the light leakage point is generated by being related to the scanning line 11, the brightness of the light leakage point and the voltage difference between the scanning line 11 and the touch line 24 are in a positive correlation relationship, and the larger the voltage difference between the scanning line 11 and the touch line 24 is, the more serious the light leakage phenomenon of the touch display panel is.
And step S3: and analyzing the position of the interference electric field generated on the signal line related to the generation of the light leakage points according to the positions of the light leakage points and the film layer structure of the touch display panel.
In step S3, as shown in fig. 1, since each light leakage point is located on the lower right corner of the corresponding touch electrode 3, that is, on the lower right corner of the sub-pixel (for example, the sub-pixel B) covered by the touch electrode 3, where the right side refers to a side of each sub-pixel region far away from the corresponding data line 21, and the lower side refers to a side of each pixel region far away from the corresponding scan line 11, it can be finally determined that: an interference electric field is generated between the scanning line 11 and the edge of the upper row of touch electrodes 3.
Example two
As shown in fig. 3, a touch display panel includes an array substrate including,
a plurality of scan lines 11 and a plurality of data lines 21, the scan lines 11 and the data lines 21 being cross-insulated from each other to define a plurality of sub-pixel regions;
a plurality of pixel electrodes disposed in sub-pixel regions defined by the scan lines 11 and the data lines 21 and respectively connected to the corresponding scan lines 11 and the corresponding data lines 21;
the touch control device comprises a plurality of touch control lines 24 and a plurality of touch control electrodes 3 (dotted lines in the figure), wherein the touch control electrodes 3 are respectively connected with the corresponding touch control lines 24, each touch control electrode 3 comprises a touch control area 31 and a shielding area 32 which are connected, the touch control area 31 covers at least one sub-pixel area in an insulating mode, and the shielding area 32 covers at least one scanning line 11 in an insulating mode.
This touch-control display panel is through add shielding region 32 on touch-control electrode 3, shielding region 32 insulation cover behind scanning line 11 top, can with the voltage signal of scanning line 11 carries out local shielding, so that the position that produces the interference electric field between the edge of scanning line 11 and touch-control electrode 3 just in time is located the black matrix under, even like this interference electric field leads to this touch-control display panel to produce the light spot that leaks, the light spot that leaks also just can be sheltered from by the black matrix, can be in not increasing under the condition of black matrix linewidth, guarantee display effect.
The touch display panel also comprises a color film substrate, wherein the color film substrate and the array substrate are relatively boxed, and liquid crystal molecules are filled between the color film substrate and the array substrate; the color film substrate is provided with a black matrix used for defining a plurality of sub-pixel regions, a plurality of R color resistors, a plurality of G color resistors and a plurality of B color resistors, the R color resistors, the G color resistors and the B color resistors are all arranged in the sub-pixel regions defined by the black matrix, each R color resistor, each G color resistor and each B color resistor respectively correspond to one pixel electrode, one R color resistor and the corresponding pixel electrode thereof form one R sub-pixel, one G color resistor and the corresponding pixel electrode thereof form one G sub-pixel, one B color resistor and the corresponding pixel electrode thereof form one B sub-pixel, and the adjacent R sub-pixel, the G sub-pixel and the B sub-pixel form one RGB pixel unit.
The black matrix is located right above the position where the interference electric field is generated between the scanning line 11 and the edge of the touch electrode 3, so as to shield the light leakage point at the position.
The shielding region 32 covers the next scanning line 11 adjacent to the shielding region 32 in an insulating manner, that is, the shielding region 32 of the touch electrode 3 corresponding to the sub-pixel region in the previous row covers the scanning line 11 corresponding to the sub-pixel region in the next row, and the shielding region 32 extends and protrudes above the scanning line 11 to the sub-pixel regions in the adjacent column.
The array substrate further includes:
and the thin film transistors T connect corresponding pixel electrodes to corresponding scanning lines 11 and data lines 21, and each thin film transistor T includes a gate 22, a source 22 and a drain 23, the gate 22 is connected to the corresponding scanning line 11, the source 22 is connected to the corresponding data line 21, and the drain 23 is connected to the corresponding pixel electrode.
As shown in fig. 4, the method for manufacturing the touch display panel includes the steps of manufacturing an array substrate, wherein the steps of manufacturing the array substrate are as follows:
step 100: sequentially manufacturing a grid layer, a grid insulating layer and an active layer on a substrate, wherein the grid layer comprises a plurality of scanning lines 11 and a plurality of grid electrodes 22, the grid electrodes 22 are connected with the corresponding scanning lines 11, and the active layer comprises a silicon island which is positioned on the grid insulating layer and corresponds to the upper part of the grid electrodes 22;
step 200: manufacturing a source drain layer, wherein the source drain layer comprises a data line 21, a source electrode 22, a drain electrode 23 and a touch line 24, the data line 21 is positioned on the gate insulating layer and is mutually crossed and insulated with the scanning line 11 to define a plurality of sub-pixel regions, the source electrode 22 is connected with the corresponding data line 21 and is positioned on one side of the silicon island, the drain electrode 23 is positioned on the other side of the silicon island and is separated from the source electrode 22, and the touch line 24 is parallel to the data line 21 and is respectively positioned on two sides of the corresponding sub-pixel region with the data line 21;
step 300: manufacturing a first insulating layer, and forming a first via hole in a position, corresponding to the touch line 24, of the first insulating layer;
step 400: manufacturing a touch electrode layer, wherein the touch electrode layer comprises a plurality of touch electrodes 3, the touch electrodes 3 are connected with corresponding touch lines 24 through first via holes in the first insulating layer, the touch electrodes 3 comprise touch areas 31 and shielding areas 32 which are connected, the touch areas 31 are covered above at least one sub-pixel area in an insulating manner, and the shielding areas 32 are covered above at least one scanning line 11 in an insulating manner;
step 500: manufacturing a second insulating layer, and forming second via holes in the positions, corresponding to the drain 23, of the first insulating layer and the second insulating layer;
step 600: and manufacturing a pixel electrode layer which comprises a plurality of pixel electrodes, wherein the pixel electrodes are positioned in the corresponding sub-pixel regions and are connected with the corresponding drain electrodes 23 through second through holes on the first insulating layer and the second insulating layer.
The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.
Claims (4)
1. A touch display panel light leakage analysis method is characterized by comprising the following steps:
step S1: lightening the touch display panel to display a black picture;
step S2: sequentially cutting off various signal lines in the touch display panel, observing whether light leakage points of the touch display panel disappear after a certain signal line is cut off, and judging that the generation of the light leakage points is related to the signal line if the light leakage points disappear;
and step S3: analyzing the position of an interference electric field generated on a signal line related to the generation of the light leakage points according to the positions of the light leakage points and the film layer structure of the touch display panel;
in step S2, if it is determined that the generation of the light leakage spot is related to the scanning line, different voltage signals are input to the scanning line, different voltage signals with opposite polarities are sequentially input to the data line, and a constant voltage signal is input to the touch line.
2. The method of claim 1, wherein after determining that the light leakage point is generated in relation to a signal line of a certain type in step S2, the method further comprises: and verifying the judgment result.
3. The method of claim 2, wherein the method for verifying the determination result comprises: different voltage signals are sequentially input into a certain type of signal line which is judged to be related, constant voltage signals are input into other types of signal lines, then the brightness change of the light leakage points is observed, and if the brightness of the light leakage points changes, the verification is passed.
4. The touch display panel light leakage analysis method of claim 1, wherein in step 2, laser light is used to sequentially cut off various signal lines in the touch display panel.
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