TOUCH DISPLAY MODULE, TOUCH DISPLAY APPARATUS AND ELECTRONIC DEVICE
20260050341 ยท 2026-02-19
Inventors
- Jianghua Liu (Beijing, CN)
- Jun Yan (Beijing, CN)
- Jaeseung Kim (Beijing, CN)
- Benlian WANG (Beijing, CN)
- Zhiqiang Wang (Beijing, CN)
- Guiyu ZHANG (Beijing, CN)
- Ping LUO (Beijing, CN)
- Shui LIU (Beijing, CN)
- Jianjun LIU (Beijing, CN)
- Liqing JIANG (Beijing, CN)
- Hai ZHENG (Beijing, CN)
Cpc classification
G06F3/041
PHYSICS
G06F3/0446
PHYSICS
G06F2203/04107
PHYSICS
G06F3/0418
PHYSICS
G06F3/04164
PHYSICS
H10W42/20
ELECTRICITY
G06F3/0445
PHYSICS
G06F3/04166
PHYSICS
G06F2203/04111
PHYSICS
G06F2203/04112
PHYSICS
International classification
Abstract
Disclosed is a touch display module, the touch display module having a display area, and a non-display area that is connected to the display area. The touch display module comprises a first lead and a second lead, the second lead being disposed at a side of the first lead distant from the display area, a second signal is loaded on the second lead, the second signal having the same frequency as, but the opposite direction to, a first signal loaded on the first lead; the second signal can generate electromagnetic interference radiation opposite to that of the first signal, to weaken electromagnetic interference radiation generated by the first signal, thereby reducing the electromagnetic interference radiation of the touch display module and reducing interference with electronic devices. Also disclosed are a touch display apparatus and an electronic device.
Claims
1-25. (canceled)
26. A touch display module, having a display area and a non-display area connected to the display area, wherein the touch display module comprises: a base substrate; a first lead, provided on a side of the base substrate and located in the non-display area, and being configured to input a first signal; a second lead, an orthographic projection of the second lead on the base substrate being on a side of an orthographic projection of the first lead on the base substrate away from the display area, the second lead being configured to input a second signal, the second signal having a same frequency and being in an opposite direction with the first signal.
27. The touch display module according to claim 26, wherein during a non-touch driving period, the second lead inputs a reference signal; or the second lead is provided adjacent to the first lead, and the second lead is parallel to the first lead; or the touch display module further comprises a first grounding line, an orthographic projection of the first grounding line on the base substrate is between the orthographic projection of the second lead on the base substrate and the orthographic projection of the first lead on the base substrate, and the first grounding line is configured to input a reference signal.
28. The touch display module according to claim 26, wherein a dam away from the display area is provided in the non-display area, and the second lead is located on a side of the dam away from the display area or on a side of the dam close to the display area.
29. The touch display module according to claim 28, wherein the second lead comprises a signal segment and a binding segment connected in sequence, the signal segment is parallel to the dam, the binding segment is perpendicular to the dam, and a width of the signal segment is greater than a width of the binding segment.
30. The touch display module according to claim 29, wherein a ratio of the width of the signal segment to the width of the binding segment is 1-10.
31. The touch display module according to claim 26, wherein a number of second leads is plural, and the touch display module further comprises an adapter line, and the adapter line is connected to a plurality of first leads through via holes, respectively.
32. The touch display module according to claim 29, wherein the touch display module further comprises a haptic control layer, the haptic control layer comprises a first sub-haptic control layer and a second sub-haptic control layer, the first sub-haptic control layer and the second sub-haptic control layer are insulated from each other, and the second lead is provided on the same layer as at least one of the first sub-haptic control layer and the second sub-haptic control layer.
33. The touch display module according to claim 32, wherein the signal segment comprises a first sub-signal segment and second sub-signal segments at both ends of the first sub-signal segment, the first sub-signal segment is at the first sub-haptic control layer, the second sub-signal segment is located in the second sub-haptic control layer, and the second sub-signal segment is connected to the first sub-signal segment through a via hole.
34. The touch display module according to claim 26, wherein a width of the second lead is 30 m-200 m.
35. The touch display module according to claim 29, wherein the signal segment is disconnected at an edge or a corner of the non-display area.
36. The touch display module according to claim 26, wherein the non-display area further comprises a binding area, the binding area is provided with a binding pin, and the first lead and the second lead are bound to the binding pin.
37. The touch display module according to claim 26, wherein the touch display module further comprises a signal amplification module, an input end of the signal amplification module is configured to input a second signal, and the output end of the signal amplification module is connected to the first lead, and the amplification module is a voltage amplification module or a current amplification module.
38. The touch display module according to claim 26, wherein the touch display module further comprises a second grounding line, and an orthographic projection of the second grounding line on the base substrate is on the side of the orthographic projection of the second lead on the base substrate away from the display area.
39. The touch display module according to claim 32, wherein the first sub-haptic control layer comprises a first touch electrode and a second touch electrode, the first lead comprises a touch driving lead and/or a touch sensing lead, and the first touch electrode and the second touch electrode are connected to the touch driving lead and the touch sensing lead, respectively.
40. A touch display module applied to an in-vehicle display apparatus, comprising: a base substrate; a first lead, provided on a side of the base substrate and located in a non-display area, and being configured to input a first signal; a second lead, an orthographic projection of the second lead on the base substrate being on a side of an orthographic projection of the first lead on the base substrate away from the display area, the second lead being configured to input a second signal, the second signal having a same frequency and being in an opposite direction with the first signal; a haptic control layer, comprising a plurality of touch units, each of the touch units comprising sub-touch units arranged in an array, each of the sub-touch units comprising a first touch electrode portion and a second touch electrode portion, wherein one of the first touch electrode portion and the second touch electrode portion is interconnected, and the other of the first touch electrode portion and the second touch electrode portion is connected through a bridging layer, and a plurality of first touch electrode portions on a same straight line form a first touch electrode, a plurality of second touch electrode portions on a same straight line form a second touch electrode, the first touch electrode and the second touch electrode are connected to one first lead, respectively.
41. The touch display module according to claim 40, wherein each of the first touch electrode portions is provided with a first main body portion, and the second touch electrode portion is provided with a second main body portion, an orthographic projection of the first main body portion on the base substrate forms an overlapping position with an orthographic projection of the second main body portion on the base substrate, and the overlapping position is at a center of the sub-touch unit.
42. The touch display module according to claim 40, wherein the first touch electrode portion and the second touch electrode portion are coordinated through an interdigitated structure.
43. The touch display module according to claim 42, wherein the interdigitated structure comprises a first interdigitated portion provided on the first touch electrode portion and a second interdigitated portion provided on the second touch electrode portion, the first interdigitated portion and the second interdigitated portion are insulated on the same layer and nested with each other.
44. The touch display module according to claim 40, wherein the first touch electrode portion and the second touch electrode portion have grid-shaped electrode lines, the touch display module comprises a plurality of sub-pixels, and electrode lines of the first touch electrode portion and the second touch electrode portion are provided between the adjacent sub-pixels; or the electrode lines of the first touch electrode portion and the second touch electrode portion are at a same distance from the adjacent sub-pixels.
45. A touch display apparatus, comprising the touch display module according to claim 26.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The accompanying drawings, which are incorporated in and constitute part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. Apparently, the drawings in the following description are only for illustrating some embodiments of the present disclosure and those of ordinary skill in the art can also derive other drawings based on the drawings without paying any creative labor.
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LIST OF REFERENCE NUMBERS
[0059] 1display area, 10base substrate, 11thin film transistor, 111active layer, 1121first gate insulating layer, 1122second gate insulating layer, 113gate electrode, 1131first gate electrode, 1132second gate electrode, 114interlayer dielectric layer, 115first source electrode, 116drain electrode, 117second source electrode, 12light-emitting layer, 121first electrode, 122light-emitting element, 123second electrode, 13first planarization layer, 14second planarization layer, 15pixel defining layer, 151pixel opening, 16encapsulation layer, 17buffer layer, 18haptic control layer, 181first sub-haptic control layer, 182second sub-haptic control layer, 183first insulation layer, 184second insulation layer, 185sub-touch unit, 1851first touch electrode portion, 1852second touch electrode portion, 1853first main body portion, 1854first connecting portion, 1855first interdigitated portion, 1856second main body portion, 1857second connecting portion, 1858second interdigitated portion, 1859second cooperation portion, 186transition area, 2non-display area, 20dam, 201first filling layer, 202second filling layer, 203third filling layer, 21first lead, 211first sub-lead, 212second sub-lead, 213third insulation layer, 214forth insulation layer, 22third planarization layer, 23second lead, 231signal segment, 2311first sub-signal segment, 2312second sub-signal segment, 232binding segment, 233second sub-lead segment, 241first grounding line, 242second grounding line, 25adapter line, 251main line segment, 252branch line segment, 26binding pin, 3signal amplification module, 4touch drive chip, 5controller
DETAILED DESCRIPTION
[0060] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in a variety of forms and should not be construed as limiting the embodiments set forth herein. Instead, these embodiments are provided so that the present disclosure will be thorough and complete, and the concepts of the exemplary embodiments will be fully given to those skilled in the art. In addition, the drawings are merely schematic illustrations of the present disclosure, and are not necessarily drawn to scale. In addition, the drawings are merely schematic illustrations of the present disclosure, and are not necessarily drawn to scale.
[0061] Although relative terms such as above and under are used herein to describe the relationship of one component relative to another component, such terms are used herein only for the sake of convenience, for example, in the direction shown in the figure, it should be understood that if the referenced device is inversed upside down, a component described as above will become a component described as under. When a structure is described as above another structure, it probably means that the structure is integrally formed on another structure, or, the structure is directly disposed on another structure, or, the structure is indirectly disposed on another structure through a further structure.
[0062] Words such as one, an/a and said are used herein to indicate the presence of one or more elements/components/etc. Terms include and have are used to indicate an inclusive meaning and refer to the possibility of the existence of additional elements/components/etc. in addition to those as listed. Terms first, second and third are used herein only as markers but not limit the number of objects.
[0063] Electronic device relates to various types of signal reception, such as analog signals, 4G signals, 5G signals, WIFI signals, etc. In order to prevent harmful interference to vehicle receivers, electromagnetic radiation limits are set for the electronic device. The electronic device using touch screen technology typically uses touch drive chips driven by square waves, trapezoidal waves, or sine waves. The harmonic components of the rising and falling edges of the touch drive signal waveform may form interference harmonics, which radiate electromagnetic interference (EMI) outward. For the touch drive signals with square waves and trapezoidal waves, which contain a significant amount of harmonic components, the above situation is particularly significant.
[0064] The existing touch structure mainly relies on external devices, but compared to flexible multi-layer structures (FMLOC), this touch structure is more expensive and requires the introduction of flexible multi-layer structures to reduce touch costs. In addition, FMLOC technology may also be applied to curved display terminals. The higher the voltage of the touch drive signal is, the more frequency types of the touch drive signal are, and the larger the size of the touch screen is, the stronger the electromagnetic radiation of the touch drive signal to the outside is. The stronger electromagnetic radiation can interfere with the in-vehicle electronic devices.
[0065] In the art of vehicle industry, in order to prevent harmful electromagnetic radiation from interfering with vehicle electronic devices, electromagnetic interference radiation limits have been set for in-vehicle electronic device. In the art of new displays, OLED display modules have begun to be applied in-vehicle displays and have gradually adopted FMLOC touch structures. Compared to traditional external touch structures, for vehicle OLED display modules using FMLOC touch structures, their resistance and capacitance loads (RC loading) are large, and the display noise is also high.
[0066] In order to achieve better touch signal-to-noise ratio and touch performance, the vehicle OLED display module using FMLOC touch structure has a high voltage of the touch driving signal of the touch driving electrode. The increase in voltage of the touch drive signal can enhance electromagnetic interference radiation, which can exceed the electromagnetic radiation limit of in-vehicle electronic devices. The issue of electromagnetic interference radiation has become one of the main technical bottlenecks for the FMLOC touch structure of the vehicle OLED display modules.
[0067] Based on this, an embodiment of the present disclosure provides a touch display module. As shown in
[0068] The second lead 23 is provided on the side of the first lead 21 away from the display area 1. The second signal is loaded on the second lead 23, the second signal having a same frequency and being in an opposite direction with the first signal loaded on the first lead 21. The second signal may generate electromagnetic interference radiation in the opposite direction to the first signal, to weaken the electromagnetic interference radiation generated by the first signal and reducing the electromagnetic interference radiation of the entire touch display module, so as to reduce interference with electronic devices.
[0069] The touch display module involved in the embodiments of this disclosure will be described in detail below.
[0070] As shown in
[0071] The display layer group is provided on the base substrate 10 and may be directly stacked on a surface of the base substrate 10; alternatively, a buffer layer 17 may be provided on the surface of the base substrate 10, and the display layer group may be stacked on a surface of the buffer layer 17 away from the base substrate 10. The buffer layer 17 is made of an insulating material.
[0072] The driving circuit layer may include a plurality of thin film transistors, the thin film transistor may be a top gate or a bottom gate. Taking the top gate thin film transistor as an example, the thin film transistor may include an active layer 111, a gate electrode 113, a second gate electrode 1132, a first gate insulating layer 1121, a second gate insulating layer 1122, and a source-drain electrode.
[0073] The active layer 111 is provided on the side of the base substrate 10, and the material of the active layer 111 may be amorphous silicon semiconductor material, low-temperature polycrystalline silicon semiconductor material, metal oxide semiconductor material, organic semiconductor material, or other types of semiconductor materials. Therefore, the thin film transistor may be an N-type thin film transistor or a P-type thin film transistor. The active layer 131 may include a channel region and two different doping types of doping regions arranged on both sides of the channel region.
[0074] The first gate insulation layer 1121 is provided on a side of the active layer 111 away from the base substrate, the first gate insulation layer 1121 may cover the active layer 111 and the base substrate 10. The first gate electrode 1131 is provided on a side of the first gate insulation layer 1121 away from the base substrate 10, facing the active layer 111. That is, a projection of the first gate electrode 1131 on the base substrate 10 is within a projection of the active layer 111 on the base substrate 10. For example, the projection of the first gate electrode 1131 on the base substrate 10 coincides with a projection of the channel region of the active layer 111 on the base substrate 10. The second gate insulation layer 1122 is provided on the side of the first gate electrode 1131 away from the base substrate. The second gate insulation layer 1122 may cover both the first gate electrode 1131 and the first gate insulation layer 1121. The second gate electrode 1132 is provided on a side of the second gate insulation layer 1122 away from the base substrate 10, facing the active layer 111. The materials of the first gate insulation layer 1121 and the second gate insulation layer 1122 are an insulating material such as silicon oxide.
[0075] The thin film transistor may further include an interlayer dielectric layer 114, the interlayer dielectric layer 114 is provided on the side of the second gate electrode 1132 away from the base substrate. The interlayer dielectric layer 114 may cover the second gate electrode 1132 and the second gate insulating layer 1122, the interlayer dielectric layer 114 is made of an insulating material. The source-drain electrode is located on the surface of the interlayer dielectric layer 114 away from the base substrate 10, and the source-drain electrode includes a first source electrode 115 and a drain electrode 116. The first source electrode 115 and the drain electrode 116 are connected to the active layer 111, for example, the first source electrode 115 and the drain electrode 116 are respectively connected to the two doping regions of the corresponding active layer 111 through via holes.
[0076] The first planarization layer 13 is provided on a side of the source-drain electrode away from the base substrate 10, and a surface of the first planarization layer 13 away from the base substrate 10 is a plane. The source-drain electrode may further include a second source electrode 117, the second source electrode 117 is connected to the first source electrode 115. The second planarization layer 14 is provided on a side of the second source electrode 117 away from the base substrate 10, and the second planarization layer 14 covers the second source electrode 117 and the first planarization layer 13. A protective layer may further be provided on a side of the first source electrode 115 away from the base substrate 10, the protective layer covers the first source electrode 115 and the drain electrode 116. The first planarization layer 13 covers the protective layer.
[0077] The light-emitting layer is provided on the side of the first planarization layer 13 or the second planarization layer 14 away from an array substrate. The light-emitting layer may include a pixel defining layer 15 and a plurality of light-emitting units. The pixel defining layer 15 has a plurality of pixel openings 151, and the a plurality of light-emitting units are respectively arranged within different pixel openings 151. Each light-emitting unit may include a first electrode 121, a light-emitting element 122, and a second electrode 123. The first electrode 121 is provided on the surface of the first planarization layer 13 or the second planarization layer 14 away from the base substrate 10, the light-emitting element 122 is provided on a surface of the first electrode 121 away from the base substrate 10, and the second electrode 123 is provided on a surface of the light-emitting element 122 away from the base substrate 10. The light-emitting layer 12 may be driven to emit light through the first electrode 121 and the second electrode 123 to display images.
[0078] The first electrode 121 is connected to the first source electrode 115 or the second source electrode 117. The pixel defining layer 15 is provided on a side of the first electrode 121 away from the base substrate 10. When the thin film transistor only includes the first source electrode 115, the first electrode 121 is connected to the first source electrode 115, and the pixel defining layer 15 covers the first electrode 121 and the first planarization layer 13. When the thin film transistor further includes the second source electrode 117, the first electrode 121 is connected to the second source electrode 117, and the pixel defining layer 15 covers the first electrode 121 and the second planarization layer 14.
[0079] The second electrode 123 may serve as a cathode, and the first electrode 121 may serve as an anode. The light-emitting element 122 may be driven to emit light by applying a signal to the first electrode 121. The specific principle of light emission will not be described in detail herein. The light-emitting element 122 may include electroluminescent organic light-emitting materials and may be formed by processes such as evaporation. For example, the light-emitting element 122 may include a hole injection layer, a hole transport layer, a light generation layer, an electron transport layer, and an electron injection layer sequentially stacked on a layer of the first electrode 121. It should be noted that the light-emitting element 122 may include red, green, and blue light-emitting elements depending on the color of the light emitted.
[0080] In addition, the display panel of the present disclosure may also include an encapsulation layer 16, the encapsulation layer 16 may be provided on the light-emitting unit; the encapsulation layer 16 is provided on a side of the light-emitting layer 12 away from the base substrate 10, to encapsulate the light-emitting layer and prevent water and oxygen erosion. The encapsulation layer 16 may be a single-layer or multi-layer structure, and its material may include organic or inorganic materials, which are not specifically limited herein.
[0081] In this embodiment, the encapsulation layer 16 may include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer. The first inorganic encapsulation layer is provided on the side of the light-emitting layer 12 away from the base substrate 10, the organic encapsulation layer is provided on a side of the first inorganic encapsulation layer away from the base substrate 10, and the second inorganic encapsulation layer is provided on a side of the organic encapsulation layer away from the base substrate 10.
[0082] The display area 1 further includes a haptic control layer 18, the haptic control layer 18 may be mutual capacitance haptic control. The haptic control layer 18 includes a first sub-haptic control layer 181 and a second sub-haptic control layer 182. The first sub-haptic control layer 181 is a metal mesh layer (MM), and the second sub-haptic control layer 182 is a bridge metal layer (BM). A first insulation layer 183 is provided on a side of the first sub-haptic control layer 181 away from the base substrate 10, and a second insulation layer 184 is provided on a side of the second sub-haptic control layer 182 away from the base substrate 10. The protective layer 19 may also be provided on a side of the second insulation layer 184 away from the base substrate 10.
[0083] Due to the flow of liquid organic packaging materials, it is easy for them to overflow. In order to prevent the overflow of organic packaging materials, especially at the lower border position, a dam 20 may be provided in the non-display area away from the display area, which serves as a barrier. The cross-sectional shape of the dam 20 may be rectangular or trapezoidal as shown in the figures, and the dam 20 has at least one inclined side close to the display area, which is not limited herein.
[0084] The dam 20 is provided around the display area 1, and a stacked pattern of the dam 20 includes at least one filling layer, the filling layer is provided on the same layer and material as one or more of the first planarization layer 13, the second planarization layer 14, and the pixel defining layer 15. In this embodiment, the stacked pattern of the dam 20 may include a first filling layer 201, the first filling layer 201 is provided on the same layer and material as the first planarization layer 13. A second filling layer 202 may further be provided on the first filling layer 201, and the second filling layer 202 may be provided on the same layer and material as the second planarization layer 14. A third filling layer 203 may further be provided on the second filling layer 202, and the third filling layer 203 may be provided on the same layer and material as the pixel defining layer 15. The encapsulation layer 16, the first insulation layer 183, and the second insulation layer 184 are sequentially provided on a side of the dam 20 away from the base substrate 10.
[0085] A first lead may be provided on the non-display area 102 between the dam 20 and the display area, and on the side of the encapsulation layer 16 away from the base substrate 11. An orthographic projection of the second lead 23 on the base substrate is on a side of the orthographic projection of the first lead 21 on the base substrate away from the display area. If the second lead 23 is provided on the side of the first lead close to the display area, touch and display may be affected. The first lead 21 is configured to input the first signal, and the second lead 23 is configured to input the second signal.
[0086] The first lead 21 may be a touch signal line, the touch signal line may include: a first sub-lead 211 arranged on the same layer as the metal grid layer MM, and a second sub-lead 212 arranged on the same layer as the bridge metal layer BM and electrically connected to the first sub-lead 211. A third insulation layer 213 is provided between the second sub-lead 212 and the first sub-lead 211, and the third insulation layer 213 is provided on the same layer and material as the first insulation layer. A fourth insulation layer 214 is provided on the side of the second sub-lead 212 away from the base substrate, and the fourth insulation layer 214 is provided on the same layer and material as the second insulation layer.
[0087] By setting the touch signal line 185 as a double-layer wiring including the first sub-lead 211 and the second sub-lead 212, it is possible to load touch signals to a metal mesh layer MM through another layer of wiring even if one layer of wiring is partially broken, to effectively solve the problem of touch failure caused by the breakage of the single-layer wiring; in addition, compared to the design of single-layer wiring, the double-layer wiring can also reduce the resistance value of the touch signal line 185. In specific implementation, the first sub-lead 211 and the second sub-lead 212 are electrically connected through a via hole that penetrates the inorganic insulation layer.
[0088] The second lead 23 may be provided on the same layer as at least one of the first sub-haptic control layer and the second sub-haptic control layer. The second lead 23 is provided on the same layer as the first sub-haptic control layer, and certainly, the second lead 23 may also be provided on the same layer as the second sub-haptic control layer.
[0089] As shown in
[0090] Since gate lines and data lines (not shown) are usually provided on a side of the non-display area close to or away from the display area, the gate lines are provided on the same layer and material as the first gate electrode 1131 or the second gate electrode 1132, and the data lines are usually provided on the same layer and material as the first source electrode 115 and the drain electrode 116. Both the gate lines and the data lines are provided on a side of the haptic control layer close to the base substrate. Therefore, the non-display area 2 is further provided with a second planarization layer group that is provided on the side of the interlayer dielectric layer 114 away from the base substrate. The second planarization layer group flattens the side of the gate line and the data line away from the base substrate 10, allowing the first lead 21 to be evenly arranged on a flat surface and avoiding short circuits between a plurality of first leads 21.
[0091] The second planarization layer group may include a third planarization layer 22, the third planarization layer 22 is provided on the same layer and material as the interlayer dielectric layer 114. The second planarization layer group may further include a fourth planarization layer, the fourth planarization layer may be provided on the same layer and material as the second planarization layer 14 (not shown). The second planarization layer group may further include a fifth planarization layer (not shown), the fifth planarization layer may be provided on the same layer and material as the pixel defining layer.
[0092] The encapsulation layer 16 and the third insulation layer 213 may be provided on the side of the second planarization layer group away from the base substrate 10. Specifically, the third insulation layer 213 may be provided on the side of the encapsulation layer 16 away from the base substrate 10, and the encapsulation layer 16 may be provided on the side of the third planarization layer 22 away from the base substrate. The non-display area 2 may be provided with a fourth insulation layer 214 on the side of the second sub-touch lead and the second sub-signal segment 2312 away from the base substrate 10. The first lead 21 and the second lead 23 are insulated by the third insulation layer 213 and the fourth insulation layer 214, respectively.
[0093] In addition, the non-display area 2 also includes the buffer layer 17. It should be understood that other essential components of the display substrate should be understood by those skilled in the art, and should not be repeated here, nor should be used as a limitation to the present disclosure.
[0094] As shown in
[0095] The first lead 21 may be provided on the side of the dam 20 close to the display area, and the second lead 23 is provided between the dam 20 and the first lead 21. As shown in
[0096] As shown in
[0097] As shown in
[0098] The second lead 23 is required to counteract and weaken the electromagnetic interference radiation in the corresponding area of the first lead 21 as much as possible, in order to obtain the optimal voltage amplitude or current intensity of the second signal applied on the second lead 23, and minimize the electromagnetic interference radiation of the entire touch display module. Through the above simulation, the voltage amplitude or current intensity of the second signal may be obtained when the electromagnetic interference radiation of the touch display module is minimized.
[0099] The first signal is input through the binding pin 26 connected to the first lead 21, and the second signal is input through the binding pin 26 connected to the second lead 23. The second signal having a same frequency and being in an opposite direction with the first signal. As shown in
[0100] As shown in
[0101] As shown in
[0102] As shown in
[0103] The signal amplification module 3 outputs the amplified second signal to the binding pin 26 of the touch display panel. The second lead 23 radiates the amplified magnetic field lines in the opposite direction, weakening the touch electromagnetic interference radiation of the touch structure of the touch display apparatus.
[0104] The first signal is emitted in the self-capacitance stage and the mutual capacitance stage. The self-capacitance stage refers to a non-touch driving period of the touch display module, while the mutual capacitance stage refers to a touch driving period of the touch display module. As shown in
[0105] The second lead 23 has a width of 30 m-200 m, and it is preferred that the width of the second lead 23 is greater than or equal to 100 m. As shown in
[0106] As shown in
[0107] As shown in
[0108] As shown in
[0109] As shown in
[0110] As shown in
[0111] In order to further reduce electromagnetic interference radiation, it is possible to consider minimizing the current magnitude of the first signal as much as possible. The current magnitude of the first signal may be calculated by using an empirical formula I=Delta Cm/Cptx/Cprx, where I represents the current of the first signal, Delta Cm represents the change in capacitance value, Cptx represents the capacitance value between the first touch electrode and the cathode, and Cprx represents the capacitance value between the second touch electrode and the cathode. It should be noted that the first touch electrode herein is the touch driving electrode, and the second touch electrode is the touch sensing electrode.
[0112] The film layer above the in-vehicle touch structure is relatively thick, including the polarizing layer, adhesive layer, and cover plate, resulting in low touch signals sensed by the touch structure. In addition, considering the need to operate the touch screen while wearing gloves, the signal volume is even lower. The in-vehicle touch display panel is relatively large, generally ranging from 13 inches to 20 inches. With the existing touch drive chip 4, there is no more channels available. In order to improve touch sensitivity, the size of the touch unit may be increased.
[0113] The increase in size of the touch unit results in an increase in the area of the first and second touch electrodes of one single touch unit, as well as an increase in the capacitance between the first touch electrode and the cathode, an increase in the capacitance between the second touch electrode and the cathode, and an increase in the RC loading of the touch unit. Therefore, it is necessary to consider reducing the area of the first and second touch electrodes to lower Cptx and Cprx. However, the decrease in the area of the first touch electrode and the second touch electrode is not conducive to increasing the change in capacitance value, ensuring the accuracy of touch control.
[0114] Based on this, the embodiment of the present disclosure further provides a touch display module. As shown in
[0115] The haptic control layer includes a plurality of sub-touch units 185 arranged in an array. The first touch electrode includes a plurality of first touch electrode portions 1851, and the second touch electrode includes a plurality of second touch electrode portions 1852. The uniformity of the first touch electrode and the second touch electrode is high, which can balance the changes in capacitance values, the capacitance values between the first touch electrode portion 1851 and the cathode, and the capacitance values between the second touch electrode portion 1852 and the cathode, so as to reduce the current magnitude of the first signal without greatly affecting the touch accuracy. On the basis of the above-mentioned touch display module, electromagnetic interference radiation can be further reduced.
[0116] The touch display module involved in the embodiments of this disclosure will be described with reference to specific examples.
[0117] The haptic control layer 18 may be mutual capacitance haptic control, the haptic control layer 18 includes a first sub-haptic control layer 181 and a second sub-haptic control layer 182. The first sub-haptic control layer 181 is a metal mesh layer (MM), and the second sub-haptic control layer 182 is a bridge metal layer (BM). The metal grid is in the display area and may be divided into touch driving (Tx) metal grid and touch sensing (Rx) metal grid according to the horizontal and vertical directions.
[0118] The haptic control layer 18 includes a plurality of sub-touch units 185 arranged in an array. The sub-touch unit 185 includes a first touch electrode portion 1851 and a second touch electrode portion 1852. One of the first touch electrode portion 1851 and the second touch electrode portion 1852 is interconnected, and the other thereof is connected through a bridging layer. A plurality of first touch electrode portions 1851 on the same straight line form the first touch electrode, and a plurality of first touch electrode portions 1851 on the same straight line form the second touch electrode. The first touch electrode and the second touch electrode are respectively connected to one first lead 21.
[0119] The first touch electrode portion 1851 and the second touch electrode portion 1852 are grid-shaped electrode lines, and the touch display module includes a plurality of sub-pixels. The electrode lines of the first touch electrode and the second touch electrode are between adjacent sub-pixels. The electrode lines of the first touch electrode portion 1851 and the second touch electrode portion 1852 are at the same distance from adjacent sub-pixels to prevent any impact on the light emission of the touch display module.
[0120] Each first touch electrode portion 1851 has a first main body portion 1853, and the second touch electrode portion 1852 has a second main body portion 1856. An orthographic projection of the first main body portion 1853 on the base substrate forms an overlapping position with an orthographic projection of the second main body portion 1856 on the base substrate, and the overlapping position is at a center of the sub-touch unit 185. The first touch electrode portion 1851 and the second touch electrode portion 1852 are coordinated through an interdigitated structure. The interdigitated structure includes a first interdigitated portion 1855 on the first touch electrode portion 1851 and a second interdigitated portion 1858 on the second touch electrode portion 1852. The first interdigitated portion 1855 and the second interdigitated portion 1858 are insulated on the same layer and nested with each other.
[0121] The first touch electrode portion 1851 includes the first main body portion 1853, a first connecting portion 1854, and a plurality of first interdigitated portions 1855. The first connecting portion 1854 is connected to the first main body portion 1853 and extends outward in a direction perpendicular to the first main body portion 1853. A plurality of first interdigitated portions 1855 are connected to the first connecting portion 1854 and extend outward in a direction intersecting with the first main body portion 1853. The second touch electrode portion 1852 includes the second main body portion 1856, a second connecting portion 1857, and a plurality of second interdigitated portions 1858. The second connecting portion 1857 is connected to the second main body portion 1856 and extends outward in a direction perpendicular to the second main body portion 1856. A plurality of second interdigitated portions 1858 are connected to the second connecting portion 1857 and extend outward in a direction intersecting with the second main body portion 1856. The first main body portion 1853 and the second main body portion 1856 are overlapped in a cross shape at the center of each sub-touch unit 185.
[0122] As shown in
[0123] The first touch electrode portion 1851 includes one first main body portion 1853 arranged along the first direction and a plurality of first interdigitated portions 1855. A plurality of first interdigitated portions 1855 are respectively arranged on both sides of one first main body portion 1853. The second touch electrode portion 1852 includes one second main body portion 1856 arranged along the second direction, two second connecting portions 1857, and a plurality of second interdigitated portions 1858. The two second connecting portions 1857 are connected to one second main body portion 1856 and extend outward in a direction perpendicular to the second main body portion 1856. A plurality of second interdigitated portions 1858 are connected to the second connecting portion 1857 and extend in a direction perpendicular to the second main body portion 1856 towards the first main body portion 1853. The first interdigitated portion 1855 and the second interdigitated portion 1858 are insulated on the same layer and nested with each other. The first main body portion 1853 and the second main body portion 1856 are overlapped in a cross shape at the center of each sub-touch unit 185, with fewer transition areas 186 (dummy) at the overlapping position. The width of the transition area 186 is 60-130m.
[0124] As shown in
[0125] As shown in
[0126] Comparing the first type of touch unit with the second type of touch unit, the capacitance value change of pure finger touch (Delta Cm) increased by 59.8% from 0.106 picofarads (PF) to 0.1694 picofarads, indicating that both types of touch units meet the requirements of finger touch. The capacitance value change when touch with gloves increased from 0.04 picofarads to 0.087 picofarads. When wearing gloves for touch, the second type of touch unit is better than the first type of touch unit. The capacitance of all first touch electrodes (Total Cptx) increased by 55.3% from 505.38 picofarads to 784.67 picofarads, while the capacitance of all second touch electrodes (Total Cprx) increased by 19.6% from 471.76 picofarads to 564.12 picofarads. The second type of touch unit is closer to the limit value of the touch drive chip. The resistance of the first touch electrode increased by 35.4% from 13.81 ohms () to 18.7 ohms, while the resistance of the second touch electrode increased by 36.7% from 11.63 to 15.9, indicating that the resistance of the first type of touch unit is small. The proportion of transition area 186 has significantly decreased from 36.45% to 8.4%, while the capacitance when wearing gloves for touch control has increased by 66.9% from 1.029 picofarads to 1.717 picofarads. The second type of touch unit faces a higher risk of high and low temperature dotting, and the control pressure of the touch drive chip 4 is greater.
[0127] Comparing the first type of touch unit with the third type of touch unit, the capacitance values for pure finger touch are 1.029 picofarads and 1.026 picofarads, respectively. The changes in capacitance values for pure finger touch are 0.106 picofarads and 0.082 picofarads, respectively, with little difference. All first touch electrodes increased by 32.4% from 505.38 picofarads to 668.94 picofarads, while all second touch electrodes decreased by 3.2% from 471.76 to 457.08 picofarads. The applicability of the touch drive chip for the first touch unit is wider. The resistance of the first touch electrode increased by 21.9% from 13.81 ohms to 16.83 ohms, and the resistance of the first touch electrode increased by 75.2% from 11.63 ohms to 20.38 ohms, indicating that the overall resistance of the first type of touch unit is smaller. The proportion of transition area 186 is 36.45% and 34% respectively, with little difference.
[0128] As above described, compared to second type of touch unit and third type of touch unit, the first type of touch unit is better able to balance the relationship between the changes in capacitance values, the capacitance values between the first touch electrode and the cathode, and the capacitance values between the second touch electrode and the cathode, while ensuring the touch accuracy of the in-vehicle display apparatus and reducing the increase in RC loading. The touch unit should include as many sub-touch units 185 as possible.
[0129] The embodiment of the present disclosure further provides a touch display apparatus. The touch display apparatus may include any of the touch display modules disclosed in the embodiments. The specific structure and beneficial effects of the touch display module have been described in detail above, which will not be described in detail herein.
[0130] It should be noted that in addition to the touch display module, the touch display apparatus further includes other necessary components and compositions, such as circuit boards, power cords, etc. Those skilled in the art can supplement them according to the specific use requirements of the display apparatus, which will not be described in detail herein.
[0131] The embodiment of the present disclosure further provides an electronic device comprising a touch display apparatus according to any one of the disclosed embodiments. The electronic device can be traditional electronic devices such as mobile phones, computers, televisions, and camcorders, as well as in-vehicle electronic device, which will not be elaborated herein.
[0132] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed here. This application is intended to cover any variations, uses, or adaptations of the disclosure following the general principles thereof and including such departures from the present disclosure as come within known or customary practice in the art. It is intended that the specification and embodiments be considered as exemplary only, with a true scope and spirit of the present disclosure being indicated by the following claims.