CN114637415A - Touch display panel and electronic equipment - Google Patents
Touch display panel and electronic equipment Download PDFInfo
- Publication number
- CN114637415A CN114637415A CN202011472555.8A CN202011472555A CN114637415A CN 114637415 A CN114637415 A CN 114637415A CN 202011472555 A CN202011472555 A CN 202011472555A CN 114637415 A CN114637415 A CN 114637415A
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- Prior art keywords
- touch
- shielding
- display panel
- shielding part
- shielding portion
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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
- G06F3/0412—Digitisers structurally integrated in a display
-
- 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)
- Position Input By Displaying (AREA)
Abstract
The touch control display panel comprises a substrate, a plurality of touch control electrodes, a plurality of transmission lines and a shielding layer, wherein the plurality of touch control electrodes are arranged on one side of the substrate, the plurality of transmission lines are respectively and electrically connected with the plurality of touch control electrodes in a one-to-one correspondence manner, the shielding layer is arranged in an insulating manner at intervals with the plurality of touch control electrodes, the shielding layer comprises a first shielding part and a second shielding part, the first shielding part corresponds to the plurality of touch control electrodes, the second shielding part corresponds to the plurality of transmission lines, and the first shielding part and the second shielding part are arranged in an insulating manner. The first shielding part and the second shielding part form a complete shielding layer to play a role in shielding noise interference, the first shielding part is arranged corresponding to the touch electrodes, capacitance values between the first shielding part and the touch electrodes can be zero, and then the shielding layer does not influence the touch electrode induction on touch operation. The application also provides an electronic device.
Description
Technical Field
The application relates to the technical field of display, in particular to a touch display panel and an electronic device.
Background
At present, most electronic devices in the market have a touch function and a display function, and in order to prevent noise interference generated by a touch layer in the electronic device on the display layer, a shielding layer is added between the touch layer and the display layer in the electronic device to shield the noise interference. However, since the shielding layer needs to be connected with a fixed voltage, the capacitance between the touch layer and the shielding layer is increased, the touch function of the electronic device is affected, and the noise is still at a high level.
Disclosure of Invention
The application discloses a touch display panel, which can reduce noise interference between a touch layer and a display layer of electronic equipment and does not influence the touch function of the electronic equipment.
In a first aspect, the application provides a touch-control display panel, touch-control display panel includes base plate, a plurality of touch-control electrodes, many transmission lines and shielding layer, one side of base plate is provided with a plurality of touch-control electrodes, many transmission lines are the one-to-one electricity respectively and are connected a plurality of touch-control electrodes, the shielding layer with a plurality of touch-control electrode interval insulation sets up, the shielding layer includes first shielding part and second shielding part, first shielding part corresponds a plurality of touch-control electrode settings, second shielding part corresponds many transmission line settings, and first shielding part reaches the second shielding part insulation sets up.
The first shielding part and the second shielding part form a complete shielding layer to play a role in shielding noise interference, the first shielding part is arranged corresponding to the touch electrodes, capacitance values between the first shielding part and the touch electrodes can be zero, and then the shielding layer does not influence the touch electrode induction on touch operation.
In a second aspect, the present application further provides an electronic device, where the electronic device includes a housing and the touch display panel according to the first aspect, and the housing is used for bearing the touch display panel.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any inventive exercise.
Fig. 1 is a schematic top view of a touch display panel according to a first embodiment of the present disclosure.
Fig. 2 is a schematic sectional view taken along line I-I in fig. 1.
Fig. 3 is a schematic view illustrating a disposing manner of a shielding layer according to an embodiment of the present application.
Fig. 4 is a schematic view illustrating a disposing manner of a shielding layer according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a local circuit structure of a touch display panel according to an embodiment of the present application.
Fig. 6 is a schematic cross-sectional view of a touch display panel according to an embodiment of the disclosure.
Fig. 7 is a schematic top view of an electronic device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Fig. 1 and fig. 2 are combined, and fig. 1 is a schematic top view of a touch display panel according to a first embodiment of the present application; fig. 2 is a schematic sectional view taken along line I-I in fig. 1. The touch display panel 1 includes a substrate 11, a plurality of touch electrodes 12, a plurality of transmission lines 13, and a shielding layer 14. The touch electrodes 12 are arranged on one side of the substrate 11, the transmission lines 13 are respectively electrically connected to the touch electrodes 12 in a one-to-one correspondence manner, and the shielding layer 14 and the touch electrodes 12 are arranged in an insulating manner at intervals. The shielding layer 14 includes a first shielding portion 141 and a second shielding portion 142, the first shielding portion 141 is disposed corresponding to the touch electrodes 12, the second shielding portion 142 is disposed corresponding to the transmission lines 13, and the first shielding portion 141 and the second shielding portion 142 are disposed in an insulating manner.
Specifically, as shown in fig. 2, the arrangement of the first shielding part 141 corresponding to the plurality of touch electrodes 12 means that the orthographic projection range of the first shielding part 141 on the substrate 11 covers the orthographic projection range of the corresponding touch electrode 12 on the substrate 11, that is, a capacitance is formed between the first shielding part 141 and the touch electrode 12; similarly, the second shielding part 142 is disposed corresponding to the plurality of transmission lines 13, that is, the orthogonal projection range of the second shielding part 142 on the substrate 11 covers the orthogonal projection range of the corresponding transmission line 13 on the substrate 11, that is, a capacitor is formed between the second shielding part 142 and the transmission line 13. In this way, the voltage signal received by the first shielding portion 141 and the voltage signal received by the touch electrode 12 may be the same signal, or the voltage value of the signals received by the first shielding portion 141 and the voltage signal received by the touch electrode 12 are the same, so that the capacitance between the first shielding portion 141 and the touch electrode 12 is zero, and the shielding layer 14 formed by the first shielding portion 141 and the second shielding portion 142 plays a role of shielding noise interference.
It should be noted that the touch electrodes 12 are used for sensing a touch operation and generating a touch signal, and the transmission lines 13 are used for transmitting the touch signal. Compared with the prior art, the shielding layer 14 receives a fixed voltage signal, which results in an excessively large capacitance value formed between the shielding layer 14 and the touch electrode 12, and thus the touch operation sensed by the touch electrode 12 is affected.
It can be understood that, in this embodiment, the first shielding portion 141 and the second shielding portion 142 form the complete shielding layer 14 to shield noise interference, and the first shielding portion 141 is disposed corresponding to the touch electrodes 12, and a capacitance value between the first shielding portion 141 and the touch electrodes 12 may be zero, so that the shielding layer 14 will not affect the sensing of the touch electrodes 12 on the touch operation.
In a possible embodiment, please refer to fig. 3 and fig. 4, fig. 3 is a schematic diagram illustrating a touch electrode and a transmission line configuration method according to an embodiment of the present disclosure; fig. 4 is a schematic view illustrating a disposing manner of a shielding layer according to an embodiment of the present application. The touch electrodes 12 are divided into a plurality of touch electrode sets 121, and the adjacent touch electrode sets 121 are arranged at intervals. The plurality of transmission lines 13 form a plurality of transmission line groups 131, and each transmission line group 131 is disposed in a gap on one side of the corresponding touch electrode group 121. The first shielding portion 141 includes a plurality of first sub-shielding portions 143, and each of the first sub-shielding portions 143 is disposed corresponding to a single touch electrode group 121. The second shielding part 142 includes a plurality of second sub-shielding parts 144, and each of the second sub-shielding parts 144 is disposed corresponding to a single transmission line group 131.
Specifically, the first shielding portion 141 is electrically connected to a first signal input interface 145, and the first signal input interface 145 is configured to receive a voltage signal and transmit the voltage signal to the first shielding portion 141. The second shielding portion 142 is electrically connected to a second signal input interface 146, and the second signal input interface 146 is configured to receive a voltage signal and transmit the voltage signal to the second shielding portion 142. When the number of the first signal input interfaces 145 and the second signal input interfaces 146 is 1, as shown in fig. 4, the plurality of first sub-shielding portions 143 are connected at one end of the gap of the plurality of touch electrode sets 121 to form the first shielding portion 141; the plurality of second sub-shields 144 are connected at one side of the substrate 11 to form the second shield 142. It can be understood that, in this arrangement, on the premise of ensuring the shielding effect and not affecting the touch operation sensed by the touch electrode 12, the number of interfaces on the circuit is reduced, and the circuit layout is optimized.
In other possible embodiments, the number of the first signal input interfaces 145 and the second signal input interfaces 146 may be other numbers. When the number of the first signal input interfaces 145 and the second signal input interfaces 146 is other numbers, at least some of the first sub-shielding portions 143 are independent of each other, and each of the first sub-shielding portions 143 is electrically connected to at least one of the first signal input interfaces 145; similarly, at least some of the second sub-shielding portions 144 are independent from each other, and each of the second sub-shielding portions 144 is electrically connected to at least one of the second signal input interfaces 146. The arrangement mode can enable the voltage signals to be distributed more uniformly on the shielding layer 14, and the shielding effect is better. The number of the first signal input interface 145 and the second signal input interface is not limited in the present application.
In a possible embodiment, the front projection range of the first sub-shielding portion 143 on the substrate 11 covers the front projection range of the corresponding touch electrode group 121 on the substrate 11, and the front projection range of the second sub-shielding portion 144 on the substrate 11 covers the front projection range of the corresponding transmission line group 131 on the substrate 11.
Specifically, a capacitor is formed between the first sub-shielding portion 143 and the corresponding touch electrode group 121, and a capacitor is formed between the second sub-shielding portion 144 and the corresponding transmission line group 131. It can be understood that, when the touch display panel 1 is in operation, a capacitance value between each of the first sub-shielding portions 143 and the corresponding touch electrode group 121 is zero, so as to achieve an effect of localized control.
Next, a description will be made of the test and driving of the touch display panel 1 provided in the present application. It should be noted that, in a normal situation, before the touch display panel 1 is used, it needs to be tested whether the touch display panel can work normally, for example, whether the transmission line 13 is broken is detected.
In one possible embodiment, the first shielding part 141 receives a ground signal, and the second shielding part 142 receives a first touch signal generated by the touch electrode.
Specifically, since the first shielding part 141 receives a ground signal, a voltage difference exists between the first shielding part 141 and the touch electrode 12, so that a reference capacitance value detected during a test is mostly the capacitance value of the touch electrode 12. At this time, since the second shielding part 142 receives the first touch signal and the first touch signal is also transmitted in the transmission line 13, that is, the signals between the second shielding part 142 and the transmission line 13 are identical, the transmission line 13 is not affected by the second shielding part 142. The reference capacitance at the broken position of the transmission line 13 will change greatly, and whether the transmission line 13 is broken can be judged according to the reference capacitance ratio before and after the broken.
In a case where the touch display panel 1 works normally, in a possible embodiment, the first shielding part 141 receives a first touch signal generated by the touch electrode, and the second shielding part 142 receives the first touch signal.
Specifically, for the touch electrode 12, since the signals of the first shielding part 141 are consistent with the signals of the touch electrode 12, the capacitance between the first shielding part 141 and the touch electrode 12 is zero, and the load for driving the touch electrode 12 is greatly reduced. Meanwhile, the first shielding part 141 and the second shielding part 142 respectively cover the touch electrode 12 and the transmission line 13, so that a complete shielding surface is formed, and a shielding effect is maintained.
Next, a circuit embodiment of the touch display panel 1 will be explained.
In a possible embodiment, please refer to fig. 5, and fig. 5 is a schematic diagram of a local circuit structure of a touch display panel according to an embodiment of the present disclosure. The touch display panel 1 further includes a data selector 15, an input end of the data selector 15 is configured to receive a test signal, and an output end of the data selector 15 is electrically connected to the first shielding portion 141.
Specifically, the data selector 15 may transmit different voltage signals to the first shielding part 141 according to the different test signals.
In a possible embodiment, the touch display panel 1 further includes an operational amplifier 16, an input end of the operational amplifier 16 is electrically connected to the touch electrode 12, and an output end of the operational amplifier 16 is electrically connected to the second shielding portion 142.
Specifically, as shown in fig. 5, the operational amplifier 16 needs to be connected to the power supply VDD and then used. The operational amplifier 16 may amplify a weak signal, so that the second shielding part 142 or the first shielding part 141 receives the signal enough to generate a corresponding voltage for the second shielding part 142 or the first shielding part 141.
In a possible embodiment, the touch display panel 1 has a test phase and a driving phase, in the test phase, when the test signal received by the data selector 15 is at a first level, the data selector 15 is configured to transmit a ground signal to the first shielding portion 141; in the driving phase, when the test signal received by the data selector 15 is at the second level, the data selector 15 is configured to transmit the electrical signal output by the operational amplifier 16 to the first shielding part 141.
Specifically, when the touch display panel 1 is in the test stage or the driving stage, please refer to the above description for the test or working principle of the touch display panel 1, which is not described herein again.
In a possible embodiment, in the test phase and the driving phase, when the touch electrode 12 generates a first touch electrical signal and transmits the first touch electrical signal to the operational amplifier 16 through the corresponding transmission line 13, the operational amplifier 16 is configured to amplify the first touch electrical signal to obtain a second touch electrical signal, and the second shielding portion 142 is configured to receive the second touch electrical signal.
In one possible embodiment, the frequency and phase of the first touch electrical signal are the same as those of the second touch electrical signal, and the amplitude of the second touch electrical signal is greater than that of the first touch electrical signal.
Specifically, since the second touch electrical signal is amplified by the operational amplifier 16, the frequency and the phase of the first touch electrical signal are the same as those of the second touch electrical signal, and the amplitude of the second touch electrical signal is greater than that of the first touch electrical signal.
In a possible embodiment, please refer to fig. 6, and fig. 6 is a schematic cross-sectional view of a touch display panel according to an embodiment of the present disclosure. The touch display panel 1 further comprises a display screen 17, wherein the display screen 17 is disposed on one side of the shielding layer 14 departing from the touch electrode 12.
Specifically, when the touch display panel 1 operates, the first shielding portion 141 and the second shielding portion 142 receive the second touch electrical signal, so that the shielding layer 14 shields noise interference generated by the display screen 17 on the touch electrode 12. Meanwhile, the driving load of the touch electrode 12 is reduced.
In one possible embodiment, please refer to FIG. 6 again. The touch display panel 1 further includes a first adhesive layer 18 and a second adhesive layer 19, the first adhesive layer 18 is used for bonding the touch electrodes 12, the transmission lines 13 and the shielding layer 14, and the second adhesive layer 19 is used for bonding the shielding layer 14 and the display screen 17.
Specifically, the first adhesive layer 18 and the second adhesive layer 19 have a bearing and connecting function, and also have a spacing and insulating function. The first adhesive layer 18 separates the shielding layer 14 from the touch electrode 12 and the transmission line 13, so that a capacitance is formed between the first shielding part 141 and the touch electrode 12, and a capacitance is formed between the second shielding part 142 and the transmission line 13.
Fig. 7 is a schematic top view of an electronic device 2 according to an embodiment of the present application, and fig. 7 is a schematic top view of the electronic device 2. The electronic device 2 includes a housing 21 and the touch display panel 1 as described above, where the housing 21 is used for carrying the touch display panel 1. Please refer to the above description for the touch display panel 1, which is not described herein again.
The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (13)
1. The utility model provides a touch-control display panel, its characterized in that, touch-control display panel includes base plate, a plurality of touch-control electrodes, many transmission lines and shielding layer, one side of base plate is provided with a plurality of touch-control electrodes, many transmission lines are the one-to-one electricity respectively and are connected a plurality of touch-control electrodes, the shielding layer with a plurality of touch-control electrode interval insulation sets up, the shielding layer includes first shielding part and second shielding part, first shielding part corresponds a plurality of touch-control electrode settings, the second shielding part corresponds many transmission line settings, and first shielding part reaches the insulation of second shielding part sets up.
2. The touch display panel according to claim 1, wherein the plurality of touch electrodes are divided into a plurality of groups of touch electrodes, adjacent groups of the touch electrodes are spaced apart, the plurality of transmission lines form a plurality of transmission line groups, each group of the transmission line groups is disposed in a gap on one side of the corresponding touch electrode group, the first shielding portion includes a plurality of first sub-shielding portions, each of the first sub-shielding portions is disposed corresponding to a single group of the touch electrodes, and the second shielding portion includes a plurality of second sub-shielding portions, each of the second sub-shielding portions is disposed corresponding to a single group of the transmission line.
3. The touch display panel of claim 2, wherein the orthographic projection range of the first sub-shielding portion on the substrate covers the orthographic projection range of the corresponding touch electrode group on the substrate, and the orthographic projection range of the second sub-shielding portion on the substrate covers the orthographic projection range of the corresponding transmission line group on the substrate.
4. The touch display panel of claim 1, wherein the first shielding portion receives a ground signal and the second shielding portion receives a first touch signal generated by the touch electrode.
5. The touch display panel of claim 1, wherein the first shielding portion receives a first touch signal generated by the touch electrode, and the second shielding portion receives the first touch signal.
6. The touch display panel according to any one of claims 1 to 5, further comprising a data selector, wherein an input terminal of the data selector is configured to receive a test signal, and an output terminal of the data selector is electrically connected to the first shielding portion.
7. The touch display panel according to claim 6, further comprising an operational amplifier, wherein an input terminal of the operational amplifier is electrically connected to the touch electrode, and an output terminal of the operational amplifier is electrically connected to the second shielding portion.
8. The touch display panel of claim 7, wherein the touch display panel has a test phase and a driving phase, and in the test phase, when the test signal received by the data selector is at a first level, the data selector is configured to transmit a ground signal to the first shielding portion; in the driving phase, when the test signal received by the data selector is at a second level, the data selector is configured to transmit the electrical signal output by the operational amplifier to the first shielding part.
9. The touch display panel according to claim 8, wherein in the test phase and the driving phase, when the touch electrodes generate a first touch electrical signal and transmit the first touch electrical signal to the operational amplifier through the corresponding transmission lines, the operational amplifier is configured to amplify the first touch electrical signal to obtain a second touch electrical signal, and the second shielding portion is configured to receive the second touch electrical signal.
10. The touch display panel according to claim 8, wherein the frequency and phase of the first touch electrical signal are the same as those of the second touch electrical signal, and the amplitude of the second touch electrical signal is greater than that of the first touch electrical signal.
11. The touch display panel of claim 1, further comprising a display screen disposed on a side of the shielding layer facing away from the touch electrode.
12. The touch display panel according to any one of claims 1 to 11, further comprising a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is used for bonding the touch electrodes, the transmission lines, and the shielding layer, and the second adhesive layer is used for bonding the shielding layer and the display screen.
13. An electronic device, comprising a housing and the touch display panel of claim 12, wherein the housing is used for carrying the touch display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011472555.8A CN114637415A (en) | 2020-12-15 | 2020-12-15 | Touch display panel and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011472555.8A CN114637415A (en) | 2020-12-15 | 2020-12-15 | Touch display panel and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114637415A true CN114637415A (en) | 2022-06-17 |
Family
ID=81945107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011472555.8A Pending CN114637415A (en) | 2020-12-15 | 2020-12-15 | Touch display panel and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114637415A (en) |
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2020
- 2020-12-15 CN CN202011472555.8A patent/CN114637415A/en active Pending
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