CN106908685B - A kind of test macro and its test method of mutual capacitance type touch display unit - Google Patents
A kind of test macro and its test method of mutual capacitance type touch display unit Download PDFInfo
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- CN106908685B CN106908685B CN201710100551.9A CN201710100551A CN106908685B CN 106908685 B CN106908685 B CN 106908685B CN 201710100551 A CN201710100551 A CN 201710100551A CN 106908685 B CN106908685 B CN 106908685B
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- 238000012360 testing method Methods 0.000 title claims abstract description 343
- 238000010998 test method Methods 0.000 title abstract 2
- 238000003466 welding Methods 0.000 claims description 44
- 238000000034 method Methods 0.000 claims description 13
- 229910000679 solder Inorganic materials 0.000 abstract 4
- 238000001514 detection method Methods 0.000 description 11
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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Abstract
The embodiment of the invention discloses a kind of test macros of mutual capacitance type touch display unit, comprising: test power supply；Test point disk, including most the first test solder joints, most the second test solder joints, thirds test solder joint；Touch unit comprising most items touch driving electrodes and most touch-sensing electrodes；Test display apparatus, it includes most the first display units and most the second display units, each display unit includes first electrode and second electrode, the first electrode of first display unit is connect with the second end of the different touch driving electrodes respectively, and the first electrode of second display unit is electrically connected with the second end of the different touch-sensing electrode respectively；The second electrode of first display unit and second display unit is electrically connected the third and tests solder joint.The embodiment of the invention also discloses a kind of test methods.Using the present invention, it is high to have the advantages that test short circuit, testing efficiency between two electrodes.
Description
Technical Field
The invention belongs to the field of testing, and particularly relates to a testing system and a testing method of a mutual capacitance type touch display device.
Background
The conventional mutual capacitance touch display device needs to detect a touch unit of the touch display device before being assembled into a product, test whether the touch unit normally works, for example, test whether a touch driving electrode TX is short-circuited or open-circuited, and test whether a touch sensing electrode RX is short-circuited or short-circuited, and if the touch unit has a problem, the touch display device can be assembled into the product after being repaired.
Whether a problem exists in a touch electrode of an existing touch unit is generally tested by means of an open/short detection machine (open/short detection machine), the open/short detection machine is provided with two rows of terminals, wherein one row of terminals is connected with one end of a plurality of touch driving electrodes TX, the other row of test terminals is correspondingly contacted with the other end of the touch driving electrodes TX, and then the open/short detection machine inputs a test signal to a pair of terminals of the open/short detection machine in a time-sharing manner, for example, the open/short detection machine inputs a test signal to one end of a first touch driving electrode TX in a first time period, and the other end receives a signal through the terminals, so as to complete the open circuit test of the first touch driving electrode TX and the short circuit test of an adjacent first touch electrode TX in a second time period, and similarly complete the open circuit test of a second touch driving electrode TX in the second time period, and testing the short circuit between the second touch driving electrode and the third touch driving electrode, and so on until the testing of all the touch driving electrodes TX is completed, next, disconnecting the two rows of terminals of the open/short detection machine from the touch driving electrodes TX, then connecting the two rows of terminals of the open/short detection machine with the touch sensing electrodes RX, and similarly, inputting a test signal to a pair of terminals of the open/short detection machine by the open/short detection machine in a time-sharing manner to complete the short circuit and open circuit testing of the touch sensing electrodes RX.
The inventor of the present invention finds that, in the process of testing the touch unit, in the conventional process of testing the touch driving electrode TX and the touch sensing electrode RX through an open/short detection machine, a short circuit between the touch driving electrode TX and the touch sensing electrode RX cannot be tested, that is, when one of the touch driving electrode TX and one of the touch sensing electrode RX are short-circuited, the testing method cannot be tested; moreover, the testing method is complicated, time-consuming and labor-consuming, and low in testing efficiency.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a testing system and a testing method for a mutual capacitance type touch display device. The method can be used for testing the short circuit between the touch driving electrode and the touch sensing electrode, and the testing efficiency is high.
In order to solve the above technical problem, a first aspect of the present invention provides a testing system for a mutual capacitance type touch display device, including:
the test power supply is used for outputting a plurality of test voltages;
the test point disk comprises a plurality of first test welding points, a plurality of second test welding points and a third test welding point, and the first test welding points, the second test welding points and the third test welding points receive the test voltage;
the touch unit comprises a plurality of touch driving electrodes and a plurality of touch sensing electrodes, wherein the first ends of the touch driving electrodes are electrically connected with the first test welding points, the first ends of the touch sensing electrodes are electrically connected with the second test welding points, the first test welding points electrically connected with the adjacent touch driving electrodes are different, and the second test welding points electrically connected with the adjacent touch sensing electrodes are different;
the test display device comprises a plurality of first display units and a plurality of second display units, each display unit comprises a first electrode and a second electrode, the first electrodes of the first display units are respectively connected with the second ends of the different touch driving electrodes, and the first electrodes of the second display units are respectively electrically connected with the second ends of the different touch sensing electrodes; the second electrodes of the first display unit and the second display unit are electrically connected with the third test welding spot.
In an embodiment of the first aspect of the present invention, the number of the first test pads is two, the first ends of odd touch driving electrodes share one of the first test pads, and the first ends of even touch driving electrodes share the other first test pad; or/and the number of the second test welding points is two, the first ends of the odd touch sensing electrodes share one of the first test welding points, and the first ends of the even touch sensing electrodes share the other first test welding point.
In an embodiment of the first aspect of the present invention, the number of the touch driving electrodes is the same as the number of the first test pads, and each touch driving electrode individually occupies one first test pad; and/or the first and/or second light sources,
the number of the touch sensing electrodes is the same as that of the second test welding points, and each touch sensing electrode independently occupies one second test welding point.
In an embodiment of the first aspect of the present invention, the number of the third test pads is one, and the second electrodes of the first display unit and the second display unit receive the test voltage output by the test power supply through the third test pads; or
The number of the third test welding points is multiple, and the second electrodes of the first display unit and the second display unit are respectively electrically connected with the third test welding points and receive the same test voltage output by the test power supply through the multiple third test welding points.
In an embodiment of the first aspect of the present invention, the test display device includes a first area and a second area, the first area is disposed separately from the second area, a plurality of the first display units are disposed in the first area, and a plurality of the second display units are disposed in the second area.
In an embodiment of the first aspect of the present invention, the test display device is a device other than the touch display device.
In an embodiment of the first aspect of the present invention, the touch display device comprises a display unit including the test display device.
In an embodiment of the first aspect of the present invention, the test display device is an OLED display device, the first electrode is an anode of the OLED display device, and the second electrode is a cathode of the OLED display device; or, the test display device is an LCD display device, the first electrode is a pixel electrode of the LCD display device, and the second electrode is a common electrode of the LCD display device.
In an embodiment of the first aspect of the present invention, the touch display device further includes a display unit, and the touch unit is disposed above the display unit or disposed in the display unit.
A second aspect of the embodiments of the present invention provides a method for testing a system for testing a mutual capacitance type touch display device, where the method includes:
a plurality of test voltages input by a test power supply in a first time period are supplied to a first electrode of a first display unit through a first test welding point and a touch driving electrode, wherein the test voltages received by two adjacent touch driving electrodes are respectively a high level and a low level;
a plurality of test voltages input by the test power supply in a second time period are supplied to the first electrode of the second display unit through the second test welding point and the touch sensing electrode, wherein the test voltages received by two adjacent touch sensing electrodes are respectively a high level and a low level;
the test power supply inputs the same test voltage and supplies the same test voltage to the second electrodes of the first display unit and the second display unit through the third test welding spot;
the first display unit performs brightness display according to the test voltage received by the first electrode and the test voltage received by the second electrode, and the second display unit performs brightness display according to the test voltage received by the first electrode and the test voltage received by the second electrode.
The embodiment of the invention has the following beneficial effects:
the test system comprises a test power supply, a test point disc, a touch unit and a test display device, wherein the test point disc is electrically connected with the test power supply to access test voltage, the touch unit is electrically connected with the test point disc, and the test display device is electrically connected with the touch unit, so that the test display device can display different brightness by inputting different test voltages from the test power supply, and therefore, according to the display of different brightness of the test display device, the short/open circuit of a touch driving electrode, the short/open circuit of a touch sensing electrode and the short circuit between the touch driving electrode and the touch sensing electrode can be obtained, the test is simple, and the efficiency is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram illustrating a testing system of a mutual capacitance touch display device according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a testing method of the testing system according to the first embodiment of the present invention;
FIG. 3 is a diagram illustrating a testing system of a mutual capacitance touch display device according to a second embodiment of the present invention;
description of the figure numbers:
110-a test power supply; 120. 320-test point disk; 121. 321-a first test pad; 122. 322-a second test pad; 123-a third test pad; 130-a touch unit; 200-testing the display device; 210-a first display unit; 220-a second display unit; 230-a first electrode; 240-a second electrode; 250-a first area; 260-a second area; TX-touch drive electrodes; RX-touch sensing electrodes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprising" and "having," and any variations thereof, as appearing in the specification, claims and drawings of this application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
First embodiment
Referring to fig. 1, an embodiment of the invention provides a testing system for a mutual capacitance type touch display device, including a testing power supply 110, a testing point plate 120, a touch unit 130, and a testing display device 200. The touch display device includes the touch unit 130 and a display unit, the display unit is used for displaying, and the touch unit 130 may be disposed in a display unit (in cell) or disposed above the display unit (on cell).
In this embodiment, the test power supply 110 is configured to output a plurality of test voltages to be provided to the test point tray 120, and the test voltage provided by the test power supply 110 may be controlled manually or by an automated device, such as a computer. The test power supply 110 may or may not be a stand-alone power supply.
The number of the test pads 120(test pads) may be one, or may be multiple, and in this embodiment, is one. The test point pad 120 includes a plurality of first test pads 121, a plurality of second test pads 122, and a third test pad 123, wherein the first test pads 121, the second test pads 122, and the third test pads 123 are respectively electrically connected to the test power source 110 for receiving the test voltage, the test power source 110 can provide different test voltages to the first test pads 121, the second test pads 122, and the third test pads 123, and the test voltages of the first test pads 121 may be different from each other, and the test voltages of the second test pads 122 may be different from each other.
The touch unit 130 includes a plurality of touch driving electrodes TX extending along a first direction and a plurality of touch sensing electrodes RX extending along a second direction, the touch driving electrodes TX and the touch sensing electrodes RX are arranged perpendicularly and crosswise, in this embodiment, the touch driving electrodes TX extend along an X-axis direction, and the touch sensing electrodes RX extend along a Y-axis direction, but the opposite is certainly possible; in this embodiment, the touch unit 130 is a mutual capacitance type touch unit. In this embodiment, a first end (right end in the figure) of the touch driving electrode TX is electrically connected to the first test pad 121, a first end (upper end in the figure) of the touch sensing electrode RX is electrically connected to the second test pad 122, and the first test pads 121 electrically connected to the adjacent touch driving electrodes TX are different, in this embodiment, the number of the first test pads 121 is the same as the number of the touch driving electrodes TX, each touch driving electrode TX corresponds to a first test pad 121 electrically connected to a different one, that is, each touch driving electrode TX individually occupies one first test pad 121, the first test pad 121 is not shared by other touch driving electrodes TX, the second test pads 122 electrically connected to the adjacent touch sensing electrodes RX are different, in this embodiment, the number of the second test pads 122 is the same as the number of the touch sensing electrodes RX, each of the touch sensing electrodes RX correspondingly and electrically connects to a different second test pad 122, that is, each of the touch sensing electrodes RX individually occupies one second test pad 122, and the second test pad 122 is not shared by other touch sensing electrodes RX.
In this embodiment, when the test display device 200 is used for testing, the test display device 200 displays different brightness, so that whether the touch unit 130 is short-circuited/open-circuited can be seen. Specifically, the test display device 200 includes a plurality of first display units 210 and a plurality of second display units 220, the first display units 210 may include one pixel or a plurality of pixels, similarly, the second display units 220 may include one pixel or a plurality of pixels, each display unit includes a first electrode 230 and a second electrode 240, that is, each first display unit 210 includes a first electrode 230 and a second electrode 240, each second display unit 220 also includes a first electrode 230 and a second electrode 240, in this embodiment, all the second electrodes 240 are electrically connected together and are a whole metal layer. The first electrodes 230 of the first display unit 210 are electrically connected to second ends (left ends in the figure) of the different touch driving electrodes TX, that is, the number of the first electrodes 230 of the first display unit 210 is the same as the number of the touch driving electrodes TX, and when a test voltage is input to the touch driving electrodes TX, the first electrodes 230 of the first display unit 210 receive the test voltage. The first electrodes 230 of the second display unit 220 are electrically connected to the second ends (lower ends in the figure) of the different touch sensing electrodes RX, that is, the number of the first electrodes 230 of the second display unit 220 is the same as the number of the touch sensing electrodes RX, and when a test voltage is input to the touch driving electrodes TX, the first electrodes 230 of the second display unit 220 receive the test voltage. The second electrodes 240 of the first display unit 210 and the second display unit 220 are electrically connected to the third test pads 123, in this embodiment, the number of the third test pads 123 is one, and the second electrodes 240 of the first display unit 210 and the second display unit 220 are electrically connected to the third test pads 123, that is, the second electrodes 240 of the first display unit 210 and the second display unit 220 receive the same test voltage output by the test power supply 110 through the same third test pads 123. In addition, in another embodiment of the present invention, the number of the third test pads may be multiple, and the second electrodes of the first display unit and the second display unit are respectively electrically connected to the third test pads and receive the same test voltage output by the test power source through the multiple third test pads. In the present embodiment, the test display device 200 displays different brightness according to the voltage difference between the first electrode 230 and the second electrode 240 of the first display unit 210 and the voltage difference between the first electrode 230 and the second electrode 240 of the second display unit 220.
In the following, how to test whether the touch units 130 are normal is illustrated by way of example, referring to fig. 1, in this example, the number of the touch driving electrodes TX is 3, the number of the touch sensing electrodes RX is also 3, at this time, the number of the first test pads 121 is 3, the number of the second test pads 122 is also 3, the number of the third test pads 123 is 1, the number of the first display units 210 is 3, and the number of the second display units 220 is also 3. The test voltage input by the test power supply 110 for the first time is a test voltage of a high level, a low level, and when the touch unit 130 is normal, the test voltage obtained by the test point panel 120, the touch unit 130, the test display device 200, and the brightness displayed by the test display device 200 are respectively as shown in table one:
watch 1
When the touch unit 130 is abnormal, for example, the first touch driving electrode TX is disconnected, the voltage signal obtained by the test display device 200 and the brightness displayed by the test display device 200 are respectively as shown in table two:
watch two
At this time, it can be clearly seen that the first display unit 210 corresponding to the first touch driving electrode TX is dark, so that it can be clearly determined that the first touch driving electrode TX corresponding to the first display unit 210 is open.
When the touch unit 130 is abnormal, for example, the first touch driving electrode TX and the second touch driving electrode TX are short-circuited, the voltage signal obtained by the test display device 200 and the brightness displayed by the test display device 200 are respectively as shown in table three:
watch III
At this time, it can be clearly seen that the first display unit 210 corresponding to the first touch driving electrode TX and the first display unit 210 corresponding to the second touch driving electrode TX are both medium-bright, that is, the brightness is a brightness between bright and dark, so that it can be clearly determined that two adjacent touch driving electrodes TX are short-circuited.
When the touch unit 130 is abnormal, for example, the first touch driving electrode TX is short-circuited with the first touch sensing electrode RX, the voltage signal obtained by the test display device 200 and the brightness displayed by the test display device 200 are respectively as shown in table four:
watch four
At this time, it can be clearly seen that the first display unit 210 corresponding to the first touch driving electrode TX and the second display unit 220 corresponding to the first touch sensing electrode RX are both medium-bright, that is, the brightness is a brightness between bright and dark; when the first touch driving electrode TX and the second touch sensing electrode RX are short-circuited, the tester can control the test power supply 110 to input a set of test voltages, such as low, high, low, and can test the short circuit between the two. In other embodiments of the present invention, a person skilled in the art can input other test voltages, which can also test the short circuit between the touch driving electrode and the touch sensing electrode. So that a short circuit between the touch driving electrode TX and the touch sensing electrode RX can be clearly determined.
Because the test system comprises the test power supply 110, the test point disk 120, the touch unit 130 and the test display device 200, the test point disk 120 is electrically connected with the test power supply 110 to be connected with a test voltage, the touch unit 130 is electrically connected with the test point disk 120, and the test display device 200 is electrically connected with the touch unit 130, the test display device 200 can display brightness of bright, medium bright and dark by inputting different test voltages from the test power supply 110, so that short/open circuit of the touch driving electrode TX, short/open circuit of the touch sensing electrode RX and short circuit between the touch driving electrode TX and the touch sensing electrode RX can be obtained according to different brightness display of the test display device 200, and the test is simple and high in efficiency.
In the present embodiment, the test display device 200 includes a first area 250 and a second area 260, the first area 250 and the second area 260 are separately disposed, a plurality of first display units 210 are disposed in the first area 250, and a plurality of second display units 220 are disposed in the second area 260. Thus, by separately disposing the two regions, it can be more clearly distinguished that the touch driving electrode TX or the touch sensing electrode RX is open/short-circuited, and that the touch driving electrode TX and the touch sensing electrode RX are short-circuited.
In this embodiment, the test display device 200 is a device other than a touch display device, that is, the test display device 200 is not a part of the touch display device, at this time, the test display device 200 may be used for testing touch display devices of different specifications, that is, the test display device 200 may be shared, and the operation is convenient. In addition, in another embodiment of the present invention, the test display device may also be a part of a touch display device, and specifically may be a part of a display unit, that is, the display unit includes the test display device, when the test is performed, the touch driving electrode is electrically connected to the first electrode of the first display unit, the touch sensing electrode is electrically connected to the first electrode of the second display unit, and after the test is completed, the touch driving electrode and the first electrode of the first display unit are cut off, and the touch sensing electrode and the first electrode of the second display unit are cut off.
In this embodiment, the test display device 200 is an OLED (Organic Light-Emitting Diode) display device, the first electrode 230 is an anode of the OLED display device, the second electrode 240 is a cathode of the OLED display device, and a Light-Emitting layer is sandwiched between the anode and the cathode. In addition, in another embodiment of the present invention, the test display device 200 may also be an LCD display device, the first electrode 230 is a pixel electrode, the second electrode 240 is a common electrode, and a liquid crystal material is disposed between the pixel electrode and the common electrode.
In addition, the present embodiment further provides a method for testing the testing system of the mutual capacitance type touch display device, please refer to fig. 1 and fig. 2, including the following steps:
in step S110, a plurality of test voltages are input to the first time period test power supply 110 and are supplied to the first electrode 230 of the first display unit 210 through the first test pad 121 and the touch driving electrodes TX, where the test voltages received by two adjacent touch driving electrodes TX are respectively at a high level and a low level.
A second time period test power supply 110 inputs a plurality of test voltages to be supplied to the first electrode 230 of the second display unit 220 via the second test pad 122 and the touch sensing electrodes RX, wherein the test voltages received by two adjacent touch sensing electrodes RX are respectively at a high level and a low level; in this embodiment, the first time period and the second time period are the same time period; of course, in other embodiments of the present invention, the first time period and the second time period may also be different time periods, and in this case, the first time period may be located before the second time period, or may be located after the second time period.
The test power supply 110 inputs the same test voltage to the second electrodes 240 of the first and second display units 210 and 220 through the third test pad 123S 130.
The first display unit 210 performs brightness display according to the test voltage received by the first electrode 230 and the test voltage received by the second electrode 240, and the second display unit 220 performs brightness display according to the test voltage received by the first electrode 230 and the test voltage received by the second electrode 240, S140. Accordingly, according to the luminance display of the first display unit 210 and the luminance display of the second display unit 220, the short/open circuit of the touch driving electrode TX, the short/open circuit of the touch sensing electrode RX, and the short circuit between the touch driving electrode TX and the touch sensing electrode RX can be determined. In the present embodiment, the steps of S110-S140 may be performed a plurality of times.
Second embodiment
Fig. 3 is a testing system of a mutual capacitance touch display device according to a second embodiment of the present invention, and the structure of fig. 3 is similar to that of fig. 1, so that the same reference numerals denote the same elements.
Referring to fig. 3, in the embodiment, the number of the first test pads 321 is two, and the first ends of the odd touch driving electrodes TX are electrically connected to one of the first test pads 321, that is, the first ends of the odd touch driving electrodes TX share one of the first test pads 321; the first ends of the even touch driving electrodes TX are electrically connected to another first test pad 321, that is, the first ends of the even touch driving electrodes TX share another first test pad 321; the number of the second test pads 322 is also two, and the first ends of the odd touch sensing electrodes RX are electrically connected to one of the first test pads 321, that is, the first ends of the odd touch sensing electrodes RX share one of the first test pads 321; the first ends of the even touch sensing electrodes RX are electrically connected to another first test pad 321, i.e., the first ends of the even touch sensing electrodes RX share another first test pad 321. Therefore, in the present embodiment, the area of the test point pad 320 may be reduced, and the connection point with the test power supply 110 may also be reduced, so that the cost and workload may be reduced, and the efficiency may be improved. In addition, in other embodiments of the present invention, the number of the first test pads may be two, and the number of the second test pads may be the same as the number of the touch sensing electrodes, or vice versa.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
Through the description of the above embodiments, the present invention has the following advantages:
the test system comprises a test power supply, a test point disc, a touch unit and a test display device, wherein the test point disc is electrically connected with the test power supply to access test voltage, the touch unit is electrically connected with the test point disc, and the test display device is electrically connected with the touch unit, so that the test display device can display different brightness by inputting different test voltages from the test power supply, and therefore, according to the display of different brightness of the test display device, the short/open circuit of a touch driving electrode, the short/open circuit of a touch sensing electrode and the short circuit between the touch driving electrode and the touch sensing electrode can be obtained, the test is simple, and the efficiency is high.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (9)
1. A system for testing a mutual capacitance touch display device, comprising:
the test power supply is used for outputting a plurality of test voltages;
the test point disk comprises a plurality of first test welding points, a plurality of second test welding points and a third test welding point, and the first test welding points, the second test welding points and the third test welding points receive the test voltage;
the touch unit comprises a plurality of touch driving electrodes and a plurality of touch sensing electrodes, wherein the first ends of the touch driving electrodes are electrically connected with the first test welding points, the first ends of the touch sensing electrodes are electrically connected with the second test welding points, the first test welding points electrically connected with the adjacent touch driving electrodes are different, and the second test welding points electrically connected with the adjacent touch sensing electrodes are different;
the test display device comprises a plurality of first display units and a plurality of second display units, each display unit comprises a first electrode and a second electrode, the first electrodes of the first display units are respectively connected with the second ends of the different touch driving electrodes, and the first electrodes of the second display units are respectively electrically connected with the second ends of the different touch sensing electrodes; the second electrodes of the first display unit and the second display unit are electrically connected with the third test welding spots;
the test display device is a device except the touch display device.
2. The system for testing a mutual capacitance touch display device according to claim 1, wherein the number of the first test pads is two, the first ends of the odd number of the touch driving electrodes share one of the first test pads, and the first ends of the even number of the touch driving electrodes share the other one of the first test pads; and/or the first and/or second light sources,
the number of the second test welding points is two, the first ends of the odd touch sensing electrodes share one of the first test welding points, and the first ends of the even touch sensing electrodes share the other first test welding point.
3. The testing system of a mutual capacitance touch display device according to claim 1, wherein the number of the touch driving electrodes is the same as the number of the first test pads, and each touch driving electrode individually occupies one of the first test pads; and/or the first and/or second light sources,
the number of the touch sensing electrodes is the same as that of the second test welding points, and each touch sensing electrode independently occupies one second test welding point.
4. The system for testing a mutual capacitance touch display device according to claim 1, wherein the number of the third test pads is one, and the second electrodes of the first display unit and the second display unit receive the test voltage output by the test power supply through the third test pads; or,
the number of the third test welding points is multiple, and the second electrodes of the first display unit and the second display unit are respectively electrically connected with the third test welding points and receive the same test voltage output by the test power supply through the multiple third test welding points.
5. The system for testing a mutual capacitance touch display device according to claim 1, wherein the test display device comprises a first area and a second area, the first area being disposed apart from the second area, a plurality of the first display units being disposed in the first area, and a plurality of the second display units being disposed in the second area.
6. The system for testing a mutual capacitance touch display device according to any one of claims 1-5, wherein the touch display device comprises a display unit comprising the test display device.
7. The system for testing a mutual capacitance touch display device according to any one of claims 1-5, wherein the test display device is an OLED display device, the first electrode is an anode of the OLED display device, and the second electrode is a cathode of the OLED display device; or, the test display device is an LCD display device, the first electrode is a pixel electrode of the LCD display device, and the second electrode is a common electrode of the LCD display device.
8. The system for testing a mutual capacitance touch display device according to any one of claims 1-5, wherein the touch display device further comprises a display unit, the touch unit is disposed above the display unit or the touch unit is disposed within the display unit.
9. A method for testing a system for testing a mutual capacitance touch display device according to any one of claims 1-8, comprising the steps of:
a plurality of test voltages input by a test power supply in a first time period are supplied to a first electrode of a first display unit through a first test welding point and a touch driving electrode, wherein the test voltages received by two adjacent touch driving electrodes are respectively a high level and a low level;
a plurality of test voltages input by the test power supply in a second time period are supplied to the first electrode of the second display unit through the second test welding point and the touch sensing electrode, wherein the test voltages received by two adjacent touch sensing electrodes are respectively a high level and a low level;
the test power supply inputs the same test voltage and supplies the same test voltage to the second electrodes of the first display unit and the second display unit through the third test welding spot;
the first display unit performs brightness display according to the test voltage received by the first electrode and the test voltage received by the second electrode, and the second display unit performs brightness display according to the test voltage received by the first electrode and the test voltage received by the second electrode.
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| CN102809707A (en) * | 2011-05-19 | 2012-12-05 | 马克西姆综合产品公司 | Touch panel testing using mutual capacitor measurements |
| CN102981059A (en) * | 2012-08-29 | 2013-03-20 | 北京集创北方科技有限公司 | Method for detecting defects of capacitive touch screen device |
| CN103970339A (en) * | 2013-01-28 | 2014-08-06 | 三星显示有限公司 | Display device integrated with touch screen panel |
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