CN112130704A - Touch display substrate, driving method thereof, display device and electronic equipment - Google Patents
Touch display substrate, driving method thereof, display device and electronic equipment Download PDFInfo
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- CN112130704A CN112130704A CN201910554007.0A CN201910554007A CN112130704A CN 112130704 A CN112130704 A CN 112130704A CN 201910554007 A CN201910554007 A CN 201910554007A CN 112130704 A CN112130704 A CN 112130704A
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- 239000000758 substrate Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910004205 SiNX Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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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
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- General Physics & Mathematics (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the disclosure relates to a touch display substrate, a driving method of the touch display substrate, a display device and electronic equipment. The touch display substrate may include: a plurality of touch driving electrodes; a plurality of touch sensing electrodes spaced apart from the plurality of touch driving electrodes to form capacitive coupling nodes therebetween; each touch driving electrode may include at least two sub touch driving electrodes, two ends of each sub touch driving electrode are electrically connected to an electrode trace, and the two electrode traces at the two ends of each sub touch driving electrode are configured to receive a scan input voltage signal at the same time. According to the scheme of the embodiment of the disclosure, under the condition that impedance is not increased, the capacitance load between the original touch driving electrode and the cathode is reduced, so that the charging time is obviously shortened, the scanning frequency is further improved, and the application of the On Cell TP On the large-area OLED display panel is facilitated.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of display, and in particular relates to a touch display substrate, a driving method of the touch display substrate, a touch display device and an electronic device.
Background
The integration of the touch display screen and the display panel comprises an In cell method and an On cell method. The In cell is a method for embedding the functions of the touch display module panel into the liquid crystal pixels; the On cell is a method for embedding the functions of the touch display module panel between the color filter substrate and the polarizer.
At present, in the field of display products such as mobile phones and computers, display products made of OLED (Organic light Emitting Diode) display panels are rapidly replacing the conventional LCD display screens.
In the related art, the external touch screen (On Cell TP) of the OLED display panel is driven in a mutual capacitance type, which usually requires a row of touch driving electrode Tx channels and Rx channels perpendicular to the Tx channels. With regard to the above technical solutions, the inventors have found that at least some of the following technical problems exist:
for example, the On Cell TP of the OLED display panel is about 10 μm since it is close to the Cathode (Cathode) of the OLED display panel, which causes a relatively large capacitance between the Tx and Rx channels of the On Cell TP and the Cathode. Due to the existence of the capacitor, the resistance-capacitance Delay (RC Delay) of Tx or Rx is large, and further the charging time of each channel is long, so that the improvement of the scanning frequency of the On Cell TP is limited, and the On Cell TP can be applied to a large-area OLED display panel. Accordingly, there is a need to ameliorate one or more of the problems with the related art solutions described above.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the embodiments of the present disclosure is to provide a touch display substrate, a driving method thereof, a display device, and an electronic apparatus, thereby overcoming one or more problems due to limitations and disadvantages of the related art, at least to some extent.
According to a first aspect of the embodiments of the present disclosure, there is provided a touch display substrate, including:
a plurality of touch driving electrodes;
a plurality of touch sensing electrodes spaced apart from the plurality of touch driving electrodes to form capacitive coupling nodes therebetween;
each touch driving electrode comprises at least two sections of sub touch driving electrodes, the adjacent sub touch driving electrodes are disconnected, two ends of each sub touch driving electrode are electrically connected with an electrode wire, and the two electrode wires at the two ends of each sub touch driving electrode are used for receiving a scanning input voltage signal at the same time.
In an exemplary embodiment of the present disclosure, at least one of the two electrode traces corresponding to each of the sub touch driving electrodes passes through the surface of the other sub touch driving electrode and is spaced apart from the touch sensing electrode.
In an exemplary embodiment of the present disclosure, the electrode traces passing through the surfaces of the other sub touch driving electrodes are connected to the bonding area of the touch display substrate.
In an exemplary embodiment of the present disclosure, each sub touch driving electrode includes a plurality of disconnected electrode portions, adjacent electrode portions are electrically connected through a metal bridge line, and an electrode trace passing through the surface of another sub touch driving electrode is on the same layer as the metal bridge line.
In an exemplary embodiment of the present disclosure, each of the touch sensing electrodes includes at least two segments of sub touch sensing electrodes, adjacent sub touch sensing electrodes are disconnected, and two ends of each sub touch sensing electrode are electrically connected to one electrode trace.
In an exemplary embodiment of the present disclosure, each of the touch sensing electrodes is separated from each of the sub touch driving electrodes by an insulating layer.
In an exemplary embodiment of the present disclosure, the sub touch driving electrodes and the touch sensing electrodes are formed using Metal Mesh or ITO material.
According to a second aspect of the embodiments of the present disclosure, a touch display device is provided, which includes the touch display substrate described above, and a touch sensing circuit coupled to the touch sensing electrode to measure a capacitance change at a capacitive coupling node.
According to a third aspect of the embodiments of the present disclosure, there is provided a touch electronic device including the touch display device.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a touch driving method, which is applied to the touch display substrate, and the driving method includes:
receiving scanning input voltage signals to the plurality of sub touch driving electrodes through two electrode wires at two ends of each sub touch driving electrode;
detecting a touch operation, and measuring the capacitance variation of each capacitive coupling node on the touch display substrate when the touch operation is detected;
and determining a touch position for generating the touch operation according to the variation of the capacitance.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in an embodiment of the disclosure, through the touch display substrate, each touch driving electrode includes at least two segments of sub touch driving electrodes, adjacent sub touch driving electrodes are disconnected, two ends of each sub touch driving electrode are electrically connected with an electrode trace, and the two electrode traces at the two ends of each sub touch driving electrode are used for receiving a scan input voltage signal at the same time. The capacitive load between the original touch driving electrode and the cathode is reduced under the condition that impedance is not increased, so that the charging time is obviously shortened, the scanning frequency is further improved, and the application of the On Cell TP On the large-area OLED display panel is facilitated.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 illustrates a schematic diagram of a touch display substrate in the prior art;
fig. 2 illustrates a schematic structural diagram of a touch display substrate in an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
Referring to fig. 1, fig. 1 is a touch display substrate in the prior art, which may be used on an OLED display panel. The touch display substrate includes 3 touch driving electrodes 100, i.e., electrodes Tx1, Tx2, Tx3, distributed longitudinally, and 2 touch sensing electrodes 200, i.e., electrodes Rx1, Rx2, perpendicular to the touch driving electrodes 100. Two ends of each touch driving electrode 100 are provided with an electrode trace 300 connected to the bonding region 400 of the touch display substrate. The respective adjacent electrode portions of the electrodes Tx1, Tx2, Tx3 are electrically connected through the metal bridge line 500. The touch driving electrode 100 and the touch sensing electrode 200 are located on a cathode of the OLED display panel, and have a relatively large capacitance with the cathode. Due to the existence of the capacitor, the RC Delay (RC Delay) of the touch driving electrode 100 or the touch sensing electrode 200 is large, and further the charging time of each channel is long, which limits the improvement of the On Cell TP scanning frequency and the application of the On Cell TP On the large-area OLED display panel.
In order to improve the problems in the prior art, the present exemplary embodiment first provides a touch display substrate, which may include a plurality of touch driving electrodes 100 in a vertical direction and a plurality of touch sensing electrodes 200 in a horizontal direction, as shown in fig. 2. The plurality of touch sensing electrodes 200, e.g., 2 bar electrodes (Rx1, Rx2), are spaced apart from the plurality of touch driving electrodes 100, e.g., 3 bar electrodes (Tx1, Tx2, Tx3) to form capacitive coupling nodes therebetween. Each touch driving electrode 100 may include at least two segments of sub touch driving electrodes 101, adjacent sub touch driving electrodes 101 are disconnected, two ends of each sub touch driving electrode 101 are electrically connected to one electrode trace 300, and the two electrode traces 300 at two ends of each sub touch driving electrode 101 are configured to receive a scan input voltage signal at the same time.
With the touch display substrate in the above embodiment, each touch driving electrode 100 may include at least two segments of sub touch driving electrodes 101, adjacent sub touch driving electrodes 101 are disconnected, two ends of each sub touch driving electrode 101 are electrically connected to one electrode trace 300, and the two electrode traces 300 at two ends of each sub touch driving electrode 101 are configured to receive a scan input voltage signal at the same time. Thus, one Tx electrode channel is divided into multiple sections, each section of channel is provided with two electrode wires 300 connected with the Tx electrode channel, and through splitting of the Tx electrode channel, the capacitance load between the original Tx electrode channel, namely the touch driving electrode, and the cathode of the OLED display panel can be reduced to half or one third of the original capacitance load without increasing the channel impedance, for example. When the touch screen scans, the multiple Tx sub-channels split from the same original Tx electrode channel write signals together, namely, the signals are charged, and the charging voltages received by the multiple sub-channels are all scanning input voltage signals, so that the charging time can be obviously shortened, the scanning frequency is further improved, and the application of the On Cell TP On the large-area OLED display panel is facilitated.
Further, optionally, in an embodiment, at least one of the two electrode traces 300 corresponding to each of the sub touch driving electrodes 101 passes through the surface of the other sub touch driving electrode 101 and is spaced apart from the touch sensing electrode 200.
Further, optionally, in an embodiment, the electrode traces 300 passing through the surfaces of the other sub touch driving electrodes 101 are connected to the bonding area 400 of the touch display substrate.
As shown in fig. 2, when the number of the sub touch driving electrodes 101 is 2, the electrode trace 300 on the upper end of the upper sub touch driving electrode 101 is directly connected to the bonding area 400, and the electrode trace 300 on the lower end may pass through the surface of the lower sub touch driving electrode 101 and then be connected to the bonding area 400. The electrode trace 300 of the lower sub touch driving electrode 101 is the same in principle.
When the number of the sub touch driving electrodes is 3, the electrode trace 300 at the lower end of the uppermost sub touch driving electrode 101 passes through the surfaces of the two sub touch driving electrodes 101 therebelow and is then connected to the bonding area 400. While the upper end electrode trace 300 of the middle sub touch driving electrode 101 passes through the surface of the upper sub touch driving electrode 101, and the lower end electrode trace 300 passes through the surface of the lower sub touch driving electrode 101.
When the number of the sub touch driving electrodes is greater than 3, the electrode routing can be arranged according to the technical scheme.
Further, optionally, in an embodiment, each sub touch driving electrode 101 may include a plurality of disconnected electrode portions 1011, adjacent electrode portions 1011 are electrically connected by a metal bridge line 500, and the electrode trace 300 passing through the surface of other sub touch driving electrodes 101 is in the same layer as the metal bridge line 500. The arrangement can simplify the layer manufacturing process, reduce the cost and improve the efficiency.
Further, optionally, in an embodiment, according to a principle that the touch driving electrode is divided into a plurality of sub touch driving electrodes, each of the touch sensing electrodes 200 may include at least two sub touch sensing electrodes, adjacent sub touch sensing electrodes are disconnected, and two ends of each sub touch sensing electrode are electrically connected to an electrode trace. In a similar way, each electrode routing line of the sub-touch sensing electrode is connected with the binding region of the touch display substrate, so that the capacitance load between the original touch sensing electrode and the cathode of the OLED display panel is reduced under the condition of not increasing the impedance. When the input voltage signal is scanned, the charging voltage received by each electrode wire is the input voltage, so that the charging time is obviously shortened, and the scanning frequency is further improved.
Further, optionally, in an embodiment, each of the touch sensing electrodes is separated from the sub touch driving electrode by an insulating layer. And the touch sensing electrode is not connected with the sub touch driving electrode to form mutual capacitance. The insulating layer can be made of SiNx or SiO2The inorganic layer may be an organic layer such as OC, but is not limited thereto. The prior art is referred to for the process technology of the insulating layer.
Further, optionally, in an embodiment, the sub touch driving electrodes 101 and the touch sensing electrodes 200 may be formed by using a Metal Mesh or an ITO (indium tin oxide) material, but are not limited thereto. The Metal Mesh or Indium Tin Oxide (ITO) technology of the Metal grid is mature, the process reliability is reliable, and the yield is high.
The touch display device may include the touch display substrate according to any of the above embodiments, and a touch sensing circuit coupled to a touch sensing electrode in the touch display substrate to measure a capacitance change at a capacitive coupling node. The touch display device may be an OLED display panel, but is not limited thereto.
The present example embodiment also provides a touch electronic device, which may include the touch display device of the above-described embodiment. The touch electronic device may be a smartphone, a tablet, a wearable device, or the like.
In this embodiment, in the touch display device and the touch electronic apparatus, each touch driving electrode 100 of the touch display substrate may include at least two segments of sub touch driving electrodes 101, adjacent sub touch driving electrodes 101 are disconnected, two ends of each sub touch driving electrode 101 are electrically connected to one electrode trace 300, and the two electrode traces 300 at two ends of each sub touch driving electrode 101 are configured to receive a scan input voltage signal at the same time. Thus, one Tx electrode channel is divided into multiple sections, each section of channel is provided with two electrode wires 300 connected with the Tx electrode channel, and through splitting of the Tx electrode channel, the capacitance load between the original Tx electrode channel, namely the touch driving electrode, and the cathode of the OLED display panel can be reduced to half or one third of the original capacitance load without increasing the channel impedance, for example. When the touch screen scans, the multiple Tx sub-channels split from the same original Tx electrode channel write signals together, namely, the signals are charged, and the charging voltages received by the multiple sub-channels are all scanning input voltage signals, so that the charging time can be obviously shortened, the scanning frequency is further improved, and the application of the On Cell TP On the large-area OLED display panel is facilitated.
The present exemplary embodiment further provides a touch driving method, which is applied to the touch display substrate described in any of the above embodiments, and the driving method may include:
s101: receiving a scan input voltage signal to the plurality of sub touch driving electrodes through two electrode traces 300 at two ends of each sub touch driving electrode 101;
s102: detecting a touch operation, and measuring the capacitance variation of each capacitive coupling node on the touch display substrate when the touch operation is detected;
s103: and determining a touch position for generating the touch operation according to the variation of the capacitance.
Through the application of the touch driving method of the above embodiment, the same technical effects as those of the touch display substrate can be achieved, and the details are not described here.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A touch display substrate, comprising:
a plurality of touch driving electrodes;
a plurality of touch sensing electrodes spaced apart from the plurality of touch driving electrodes to form capacitive coupling nodes therebetween;
each touch driving electrode comprises at least two sections of sub touch driving electrodes, the adjacent sub touch driving electrodes are disconnected, two ends of each sub touch driving electrode are electrically connected with an electrode wire, and the two electrode wires at the two ends of each sub touch driving electrode are used for receiving a scanning input voltage signal at the same time.
2. The touch display substrate according to claim 1, wherein at least one of the two electrode traces corresponding to each of the sub touch driving electrodes passes through the surface of the other sub touch driving electrode and is spaced apart from the touch sensing electrode.
3. The touch display substrate of claim 2, wherein the electrode traces that pass through the surface of the other sub-touch drive electrodes are connected to the bonding regions of the touch display substrate.
4. The touch display substrate of claim 2, wherein each sub-touch driving electrode comprises a plurality of disconnected electrode portions, adjacent electrode portions are electrically connected through a metal bridge line, and the electrode traces passing through the surfaces of the other sub-touch driving electrodes are in the same layer as the metal bridge line.
5. The touch display substrate according to claim 1, wherein each touch sensing electrode comprises at least two segments of sub touch sensing electrodes, adjacent sub touch sensing electrodes are disconnected, and two ends of each sub touch sensing electrode are electrically connected with an electrode trace.
6. The touch display substrate of any one of claims 1 to 5, wherein each touch sensing electrode is separated from each sub touch driving electrode by an insulating layer.
7. The touch display substrate according to any one of claims 1 to 5, wherein the sub touch driving electrodes and the touch sensing electrodes are formed by Metal Mesh or Indium Tin Oxide (ITO) material.
8. A touch display device comprising the touch display substrate of any of claims 1-7 and touch sensing circuitry coupled to the touch sensing electrodes to measure a change in capacitance at a capacitive coupling node.
9. A touch electronic device characterized by comprising the touch display device according to claim 8.
10. A touch driving method applied to the touch display substrate according to any one of claims 1 to 7, the driving method comprising:
receiving scanning input voltage signals to the plurality of sub touch driving electrodes through two electrode wires at two ends of each sub touch driving electrode;
detecting a touch operation, and measuring the capacitance variation of each capacitive coupling node on the touch display substrate when the touch operation is detected;
and determining a touch position for generating the touch operation according to the variation of the capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910554007.0A CN112130704A (en) | 2019-06-25 | 2019-06-25 | Touch display substrate, driving method thereof, display device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910554007.0A CN112130704A (en) | 2019-06-25 | 2019-06-25 | Touch display substrate, driving method thereof, display device and electronic equipment |
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| CN112130704A true CN112130704A (en) | 2020-12-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112214121A (en) * | 2019-07-09 | 2021-01-12 | 陕西坤同半导体科技有限公司 | Touch display substrate, driving method thereof, display device and electronic equipment |
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