CN113485584A - Touch display device and test method thereof - Google Patents
Touch display device and test method thereof Download PDFInfo
- Publication number
- CN113485584A CN113485584A CN202110852110.0A CN202110852110A CN113485584A CN 113485584 A CN113485584 A CN 113485584A CN 202110852110 A CN202110852110 A CN 202110852110A CN 113485584 A CN113485584 A CN 113485584A
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- touch
- electrodes
- display device
- test pad
- module
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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
- G06F3/0416—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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
A touch display device and a test method thereof are provided. The touch display device comprises a display module and a touch module. The touch module is connected with the display module and comprises a touch substrate, a first touch electrode, a second touch electrode, a first touch wire, a second touch wire, a first switch unit and a second switch unit. The test method of the touch display device comprises the following steps: shorting the first drain; electrically connecting the short-circuited first drain electrode with the first test pad; shorting the second drain; electrically connecting the second drain electrode after short circuit with a second test bonding pad; conducting the first grid and the second grid by a switching signal; and testing whether a short circuit is generated between the first test pad and the second test pad.
Description
Technical Field
The present disclosure relates to the field of touch display technologies, and in particular, to a touch display device and a test method thereof.
Background
In the touch panel, if the touch traces are routed to both sides of the display after changing the lines under the pad bending area (pad bending area), a large number of touch traces are generated. However, the touch traces are too dense and large in number, so that the touch traces are difficult to test.
Particularly, for a product with a self-contained and integrated Touch and Display Driver (TDDI) chip, the touch trace at the middle position of the pad bending area cannot be tested, so that it is impossible to monitor whether a problem occurs in the manufacturing process.
Therefore, a touch display device and a testing method thereof are needed to solve the problems in the prior art.
Disclosure of Invention
In order to solve the above technical problems, the present application provides a touch display device and a testing method thereof. In the present application, the plurality of first switch units are electrically connected to the plurality of first touch traces, respectively; electrically connecting the plurality of second switch units with the plurality of second touch-control wires respectively; electrically connecting the short-circuited first drains with a first test pad; and electrically connecting the second drain electrodes after short circuit with the second test bonding pad, and detecting the routing to detect the technical problem. Particularly, the touch panel can detect whether the routing on the pad bending area which is bent to the back of the panel and bound with the touch display chip is abnormal or not.
Based on the above objective, the present application provides a touch display device. The touch display device comprises a display module and a touch module. The touch module is connected with the display module and comprises a touch substrate, a plurality of first touch electrodes, a plurality of second touch electrodes, a plurality of first touch wires, a plurality of second touch wires, a plurality of first switch units and a plurality of second switch units. The plurality of first touch electrodes are arranged in a plurality of straight rows along a first direction and are arranged on the touch substrate. The plurality of second touch electrodes are arranged in a plurality of rows along the second direction and are arranged on the touch substrate, and the plurality of second touch electrodes and the plurality of first touch electrodes are arranged in a staggered manner. The plurality of first touch-control wires are respectively electrically connected with the plurality of first touch-control electrodes and a part of the plurality of second touch-control wires. The plurality of second touch-control wires are respectively electrically connected with the plurality of first touch-control electrodes and the other part of the plurality of second touch-control wires. The plurality of first switch units are respectively electrically connected with the plurality of first touch-control wires and comprise a plurality of first grids, a plurality of first sources and a plurality of first drains. The plurality of second switch units are respectively electrically connected with the plurality of second touch-control wires and comprise a plurality of second grids, a plurality of second source electrodes and a plurality of second drain electrodes. The plurality of first gates and the plurality of second gates receive a switching signal.
Preferably, the touch substrate is a flexible touch substrate.
Preferably, the touch module further includes a plurality of data traces electrically connected to the display module.
Preferably, the touch display device of the present application further includes a touch display chip electrically connected to the display module and the touch module.
Preferably, the touch display chip generates the touch coordinate data according to the variation of the first touch electrodes in the rows and the second touch electrodes in the columns.
Preferably, the touch display chip generates touch coordinate data according to capacitance variation between the adjacent first touch electrodes and the adjacent second touch electrodes.
In view of the above, the present application further provides a method for testing a touch display device, which is used to test the touch display device, and includes:
shorting the plurality of first drains;
electrically connecting the short-circuited first drains with a first test pad;
shorting the plurality of second drains;
electrically connecting the short-circuited second drains with a second test pad;
conducting the plurality of first grids and the plurality of second grids by using a switching signal; and
and testing whether a short circuit is generated between the first test pad and the second test pad.
Preferably, the first test pad and the second test pad are electrically connected to the plurality of first drains and the plurality of second drains, respectively, in a manner of pseudo-pressing the flexible printed circuit board.
Preferably, the first test pad and the second test pad are respectively located at two opposite sides of the touch module.
Preferably, the method for testing the touch display device further includes testing whether a short circuit is generated between the first test pad and the second test pad by using a plurality of multimeters.
Preferably, the testing method of the touch display device is performed before the touch display chip is electrically connected with the display module and the touch module.
In order to make the aforementioned and other objects of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a block diagram of a touch display device according to the present application.
Fig. 2 is a schematic view of a touch display device according to the present application.
Fig. 3 is a first schematic view of a touch module of a touch display device according to the present application.
Fig. 4 is a second schematic view of a touch module of the touch display device according to the present application.
Fig. 5 is a third schematic view of a touch module of the touch display device according to the present application.
Fig. 6 is a schematic test diagram of the touch display device of the present application.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below. Furthermore, directional phrases used herein, such as, for example, upper, lower, top, bottom, front, rear, left, right, inner, outer, lateral, peripheral, central, horizontal, lateral, vertical, longitudinal, axial, radial, uppermost or lowermost, etc., refer only to the direction of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting.
In the drawings, elements having similar structures are denoted by the same reference numerals.
As shown in fig. 1 to 5, the present application provides a touch display device 10. The touch display device 10 includes a touch module 100 and a display module 200. The touch module 100 is connected to the display module 200 to provide a touch function and a display function. Specifically, the touch display device 10 may be a device having a touch function and a display function, such as a mobile phone, a tablet computer, a wearable device, and the like.
Further, the touch module 100 includes a touch substrate 101, a plurality of first touch electrodes 102, a plurality of second touch electrodes 103, a plurality of first touch traces 104, a plurality of second touch traces 105, a plurality of first switch units 106, and a plurality of second switch units 107. The display module 200 may include a display screen, such as a liquid crystal display screen or an organic light emitting diode.
The plurality of first touch electrodes 102 are arranged in a plurality of straight rows along a first direction and are disposed on the touch substrate 101, the plurality of second touch electrodes 103 are arranged in a plurality of horizontal rows along a second direction and are disposed on the touch substrate 101, and the plurality of second touch electrodes 103 and the plurality of first touch electrodes 102 are arranged in a staggered manner. Specifically, as shown in fig. 3, the second touch electrodes 103 are disposed around the first touch electrodes 102, and the first touch electrodes 102 are disposed around the second touch electrodes 103.
The first touch traces 104 are electrically connected to a portion of the first touch electrodes 102 and a portion of the second touch electrodes 103, respectively, and the second touch traces 105 are electrically connected to another portion of the first touch electrodes 102 and the second touch electrodes 103, respectively.
In one embodiment, as shown in fig. 3, the first touch electrodes 102 and the second touch electrodes 103 form a four-by-four touch electrode matrix. In the first row of the touch electrode matrix, from left to right, the first touch electrode 102, the second touch electrode 103, the first touch electrode 102 and the second touch electrode 103 are respectively. The first touch electrodes 102 in the first row can be regarded as odd touch electrodes, and the second touch electrodes 103 can be regarded as even touch electrodes. Similarly, in the second row of the touch electrode matrix, the touch electrodes 102 in the first row can be regarded as even touch electrodes, and the second touch electrodes 103 can be regarded as odd touch electrodes.
In this embodiment, the first touch trace 104 can be connected to the odd touch electrodes, and the second touch trace 105 can be connected to the even touch electrodes. However, the disclosure is not limited thereto, in other embodiments, the first touch trace 104 may be electrically connected to only the first touch electrodes 102 of the first touch electrodes 102 and the second touch electrodes 103; the second touch trace 105 can be electrically connected to only the plurality of first touch electrodes 102 and the plurality of second touch electrodes 103 of the plurality of second touch electrodes 103. The connection relationship between the first touch electrode 102, the plurality of second touch electrodes 103, the first touch trace 104 and the second touch trace 105 can be set according to actual requirements.
Further, as shown in fig. 3 and 4, the plurality of first switch units 106 are electrically connected to the plurality of first touch traces 104, and include a plurality of first gates 1061, a plurality of first sources 1062, and a plurality of first drains 1063. The second switch units 107 are electrically connected to the second touch traces 105, and include second gates 1071, second sources 1072, and second drains 1073. The first gates 1061 and the second gates 1071 receive a switch signal through the switch signal line 109 to control whether the first touch trace 104 and the second switch unit 107 are conducted.
In one embodiment, the touch substrate 101 may be a flexible touch substrate to facilitate bending. Specifically, since the flexible touch substrate is easy to bend, the portion of the touch substrate 101 can be bent by about 180 degrees to serve as the terminal area.
In an embodiment, the touch module 100 further includes a plurality of data traces 108, and the plurality of data traces 108 are electrically connected to the display module 200. In other embodiments, the plurality of data traces 108 may also be electrically connected to the first touch electrode 102 and the second touch electrode 103. Therefore, the touch module 100 and the display module 200 can share the first touch electrode 102 and the second touch electrode 103, in other words, the first touch electrode 102 and the second touch electrode 103 can be used for displaying or used as touch electrodes, but are not limited thereto.
In one embodiment, the touch display device 10 further includes a touch display chip 300. The touch display chip 300 is electrically connected to the display module 200 and the touch module 100 to control the display module 200 to display and control the touch module 100 to perform a touch function. Further, the touch display chip 300 is a Touch and Display Driver Integration (TDDI) chip, so that the integration of touch and display driver can be realized. However, the present invention is not limited thereto, and a separate touch driving chip and a separate display driving chip may be used for other considerations.
In one embodiment, the touch display chip 300 can calculate and generate touch coordinate data according to the variation of the first touch electrodes 102 in the rows and the second touch electrodes 103 in the columns. In other words, the touch display device 10 of the present application can be a self-contained touch display device 10.
In another embodiment, the touch display chip 300 generates touch coordinate data according to capacitance variation between the adjacent first touch electrodes 102 and second touch electrodes 103. In other words, the touch display device 10 of the present application can also be a mutual capacitive touch display device 10.
In order to test the touch display device 10, the present application further provides a method for testing the touch display device 10, which includes:
s101: shorting the plurality of first drains 1063;
s102: electrically connecting the shorted first drains 1063 to the first test pad 400;
s103: shorting the plurality of second drains 1073;
s104: electrically connecting the shorted second drains 1073 with the second test pad 500;
s105: turning on the first and second gate electrodes 1061 and 1071 by a switching signal; and
s106: it is tested whether a short circuit is generated between the first test pad 400 and the second test pad 500.
Further, the testing method of the touch display device 10 is performed before the touch display chip 300 is electrically connected to the display module 200 and the touch module 100. In addition, the first test pad 400 and the second test pad 500 are respectively located at two opposite sides of the touch module 100.
In an embodiment, the step S106 further includes using a plurality of multimeters 600 to respectively test whether a short circuit occurs between the first test pad 400 and the second test pad 500, and if the short circuit occurs, it indicates that the first touch trace 104 and the second touch trace 105 have a defect, for example, a short circuit caused by a dust particle during manufacturing or a defect in manufacturing process.
In detail, according to the testing method of the touch display device 10 provided in the present application, it can be tested whether the first touch trace 104 and the second touch trace 105 of the touch module 100 have defects before the touch display chip 300 is bonded.
In an embodiment, the first test pad 400 and the second test pad 500 are electrically connected to the plurality of first drains 1063 and the plurality of second drains 1073, respectively, in a manner of pseudo-pressing a flexible printed circuit board, but not limited thereto. As shown in fig. 6, the touch module 100 and the display module 200 may be connected in a testing stage by way of pseudo-pressing the flexible printed circuit board, so as to provide the switching signals to the plurality of first gates 1061 and the plurality of second gates 1071 through the display module 200. In addition, in an embodiment, the switch signal is a low-level signal in a Cell Test (CT) phase, and is a high-level signal in a normal display phase, but not limited thereto, and may be set according to actual requirements, such as the types of the first switch unit 106 and the second switch unit 107.
In an embodiment, if the test of the first test pad 400 and the second test pad 500 is not short-circuited, which indicates that the first touch trace 104 and the second touch trace 105 are normal, the first test pad 400 and the second test pad 500 may be removed. At this time, the first drains 1063 are not shorted, and the second drains 1073 are not shorted, so that the subsequent bonding process of the touch display chip 300 may be performed.
In summary, in the touch display device 10 and the testing method thereof of the present application, the plurality of first switch units 106 are electrically connected to the plurality of first touch traces 104 respectively; electrically connecting the second switch units 107 with the second touch traces 105, respectively; electrically connecting the shorted first drains 1063 to the first test pad 400; and electrically connecting the short-circuited second drains 1073 with the second test pad 500, so that the traces can be detected under the condition that the traces are dense and difficult to detect. Particularly, the present invention can detect whether the trace on the pad bending area (pad bending area) bent to the back of the panel and bound with the touch display chip 300 is abnormal.
Although the application has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. This application is intended to embrace all such modifications and variations and is limited only by the scope of the appended claims. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification. In addition, while a particular feature of the specification may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for a given or particular application. Furthermore, to the extent that the terms "includes," has, "" contains, "or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term" comprising.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. A touch display device, comprising:
a display module; and
the touch module, with the display module assembly is connected, and includes:
a touch substrate;
the first touch electrodes are arranged in a plurality of straight rows along a first direction and are arranged on the touch substrate;
the second touch electrodes are arranged on the touch substrate in a plurality of rows along a second direction, and the second touch electrodes and the first touch electrodes are arranged in a staggered manner;
the first touch control wires are respectively and electrically connected with the first touch control electrodes and one part of the second touch control electrodes;
the second touch control wires are respectively electrically connected with the first touch control electrodes and the other parts of the second touch control electrodes;
the first switch units are respectively electrically connected with the first touch routing wires and comprise a plurality of first grids, a plurality of first sources and a plurality of first drains; and
the second switch units are respectively electrically connected with the second touch-control routing lines and comprise a plurality of second grid electrodes, a plurality of second source electrodes and a plurality of second drain electrodes;
wherein the plurality of first gates and the plurality of second gates receive a switching signal.
2. The touch display device of claim 1, wherein the touch substrate is a flexible touch substrate.
3. The touch display device of claim 1, further comprising a touch display chip electrically connected to the display module and the touch module.
4. The touch display device of claim 3, wherein the touch display chip generates touch coordinate data according to the variation of the first touch electrodes in the rows and the second touch electrodes in the columns.
5. The touch display device as claimed in claim 3, wherein the touch display chip generates touch coordinate data according to capacitance variation between the adjacent first touch electrodes and the adjacent second touch electrodes.
6. A method for testing a touch display device, the method for testing the touch display device of claim 1, comprising:
shorting the plurality of first drains;
electrically connecting the short-circuited first drains with a first test pad;
shorting the plurality of second drains;
electrically connecting the short-circuited second drains with a second test pad;
turning on the plurality of first gates and the plurality of second gates with the switching signal; and
and testing whether a short circuit is generated between the first test pad and the second test pad.
7. The method for testing a touch display device according to claim 6, wherein the first test pad and the second test pad are electrically connected to the first drains and the second drains, respectively, in a pseudo-compression flexible printed circuit board manner.
8. The method for testing a touch display device according to claim 6, wherein the first test pad and the second test pad are respectively located at two opposite sides of the touch module.
9. The method for testing a touch display device according to claim 6, further comprising testing whether a short circuit is generated between the first test pad and the second test pad by using a plurality of multimeters.
10. The method for testing a touch display device according to claim 6, wherein the method is performed before electrically connecting the touch display chip with the display module and the touch module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110852110.0A CN113485584B (en) | 2021-07-27 | 2021-07-27 | Touch display device and test method thereof |
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| CN202110852110.0A CN113485584B (en) | 2021-07-27 | 2021-07-27 | Touch display device and test method thereof |
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| CN113485584A true CN113485584A (en) | 2021-10-08 |
| CN113485584B CN113485584B (en) | 2022-11-01 |
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| CN113485584B (en) | 2022-11-01 |
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