WO2025199852A1 - 触控显示面板及触控显示装置 - Google Patents

触控显示面板及触控显示装置

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Publication number
WO2025199852A1
WO2025199852A1 PCT/CN2024/084346 CN2024084346W WO2025199852A1 WO 2025199852 A1 WO2025199852 A1 WO 2025199852A1 CN 2024084346 W CN2024084346 W CN 2024084346W WO 2025199852 A1 WO2025199852 A1 WO 2025199852A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
electrode
layer
touch
gap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/084346
Other languages
English (en)
French (fr)
Inventor
颜俊
董向丹
崔宏达
仝可蒙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Chengdu BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN202480000626.4A priority Critical patent/CN121039608A/zh
Priority to PCT/CN2024/084346 priority patent/WO2025199852A1/zh
Publication of WO2025199852A1 publication Critical patent/WO2025199852A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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

Definitions

  • Touch display panels have been widely used in mobile phones, tablet computers and other terminal devices. While displaying images, they can also realize human-computer interaction through touch operation. In the prior art, touch display panels reflect ambient light, which affects the display effect.
  • a touch display panel comprising:
  • the electrode layer is a mesh structure formed by intersecting grid lines, and the first light-transmitting holes overlap with mesh holes of the mesh structure;
  • the second touch electrodes include a plurality of electrode columns distributed and connected along the row direction, and the electrode columns include a plurality of second electrode blocks distributed at intervals along the column direction and a transfer bridge connecting two adjacent second electrode blocks;
  • the first touch electrode and the second touch electrode cross the transfer bridge via the electrode connecting portion, and the electrode connecting portion and the transfer bridge are located in different layers that are insulated from each other.
  • the touch layer further includes:
  • a transfer layer is provided on the light-emitting side of the display substrate; the transfer bridge is located on the transfer layer;
  • the electrode layer is provided on a surface of the isolation layer away from the display substrate; and the electrode connection portion is located on the electrode layer;
  • At least one of the touch leads includes a first wire body located in the transfer layer and a second wire body located in the electrode layer, and the first wire body and the second wire body are connected via a contact hole passing through the isolation layer.
  • the touch layer further includes:
  • the touch-sensitive flat layer covers the first light-absorbing layer and fills the first light-transmitting hole; the refractive index of the touch-sensitive flat layer is greater than the refractive index of the first light-absorbing layer.
  • the touch display panel further includes:
  • a second light absorption layer is provided on a surface of the touch flat layer away from the display substrate and has a plurality of second light-transmitting holes, wherein a second light-transmitting hole overlaps with a first light-transmitting hole;
  • a transparent flat layer covers the second light absorbing layer and fills the second light-transmitting hole; the refractive index of the transparent flat layer is greater than the refractive index of the second light absorbing layer.
  • the display substrate includes:
  • a pixel definition layer which is provided on the same side of the driving backplane as the light-emitting devices and has pixel openings defining the range of each light-emitting device;
  • the orthographic projection of the pixel opening on the driving backplane is located within the orthographic projection of the first light-transmitting hole on the driving backplane, and the orthographic projection of the first light-transmitting hole on the driving backplane is located within the orthographic projection of the second light-transmitting hole on the driving backplane.
  • the touch display panel further includes:
  • the reflection reduction layer is arranged on the light-emitting side of the display substrate, and the touch layer is arranged on the side of the reflection reduction layer away from the display substrate; the reflection reduction layer includes multiple filter parts, one filter part overlaps with one light-emitting device, and the color of any filter part is the same as the light-emitting color of the light-emitting device overlapping with it.
  • the display substrate includes:
  • a pixel definition layer which is provided on the same side of the driving backplane as the light-emitting devices and has pixel openings defining the range of each light-emitting device;
  • the reflective reduction layer further comprises:
  • a distance between a boundary of an orthographic projection of the pixel opening on the driving backplane and a boundary of an orthographic projection of the anti-reflection hole on the driving backplane is 0.5 ⁇ m-1 ⁇ m.
  • a touch display device comprising any one of the above-mentioned touch display panels.
  • a and B are “set in the same layer” means that A and B belong to different continuous or disconnected regions in the same film layer, and each region can be formed at the same time;
  • a and B are located in "different layers” means that A and B belong to different film layers, and different film layers refer to film layers that are not formed at the same time.
  • the peripheral circuit is connected to the pixel circuit and is used to input a driving signal to the pixel circuit to control the pixel circuit.
  • the peripheral circuit may include a gate drive circuit and a light emitting control circuit, and of course, may also include other circuits.
  • the specific structure of the peripheral circuit is not particularly limited here.
  • the shape and size of the light-emitting device LD are both defined by the pixel opening PH.
  • the range of the light-emitting device LD is the range of the pixel opening PH, and the size of the light-emitting device LD is the size of the pixel opening PH.
  • each light-emitting device LD includes at least two light-emitting devices LD of different sizes, i.e., two light-emitting devices LD of different sizes; the light-emitting devices LD of different sizes emit different colors.
  • the light-emitting device LD can be divided into multiple light-emitting units.
  • the organic layer IJP may be disposed on the surface of the first inorganic layer CVD1 away from the driving backplane BP.
  • the boundary of the orthographic projection of the organic layer IJP on the driving backplane BP may be located in the peripheral area WA to ensure that the organic layer IJP can cover each light emitting device LD.
  • the second inorganic layer CVD2 can cover the organic layer IJP and the first inorganic layer CVD1 not covered by the organic layer IJP.
  • the second inorganic layer CVD2 can block the intrusion of water and oxygen, and achieve planarization through the organic layer IJP, which has fluidity before curing.
  • the second inorganic layer CVD2 can be made of inorganic insulating materials such as silicon nitride and silicon oxide.
  • the touch display panel may further include a low-reflection layer (RL), which may be disposed on the light-emitting side of the display substrate PNL, i.e., the side of the encapsulation layer TFE away from the driver backplane BP.
  • the low-reflection layer RL may be disposed on the surface of the second inorganic layer CVD2 away from the driver backplane BP.
  • other film layers may also be disposed between the low-reflection layer RL and the encapsulation layer TFE.
  • the low-reflection layer RL can reduce ambient light reflected by the second electrode CAT and other film layers in the display substrate PNL, thereby reducing interference with light emitted by the light-emitting device LD and improving the display effect.
  • the filtering effect of the filter material can be utilized to absorb external ambient light and ambient light reflected by the second electrode CAT, thereby reducing reflection of ambient light.
  • the anti-reflection layer RL may include multiple filter sections CF, each of which transmits monochromatic light while absorbing light of other colors. Furthermore, a filter section CF can overlap with a light-emitting device LD, and the color of any filter section CF is the same as the color of the light-emitting device LD with which it overlaps, ensuring that light emitted by each light-emitting device LD can be emitted through the overlapping filter section CF.
  • the filtering effect of the filter section CF absorbs light of a different color from the ambient light, reducing the amount of ambient light that reaches reflective layers such as the second electrode CAT. Furthermore, the filter section CF can also absorb a portion of the ambient light reflected by layers such as the second electrode CAT, thereby reducing reflection of ambient light and improving the display effect.
  • the anti-reflection layer RL may also include a light-absorbing layer BM1, which can be disposed on the light-exiting side of the display substrate PNL and on the same surface as the filter CF.
  • the anti-reflection layer BM1 can be made of a black light-absorbing material. For example, it can be made of a resin mixed with carbon black, thereby absorbing light.
  • the anti-reflection layer BM1 has multiple anti-reflection holes BH1. Each filter CF is at least partially confined within a hole BH1. This means that each hole BH1 is filled with a filter CF in a one-to-one correspondence.
  • the anti-reflection layer BM1 defines the position of each filter CF and prevents light from passing between adjacent filter CFs.
  • the thickness of the filter CF and the depth of the anti-reflection holes BH1 can be the same or different, and are not specifically limited here.
  • a single anti-reflection hole BH1 can overlap with a pixel opening PH, allowing light emitted by a light-emitting device LD to exit through the overlapping filter CF.
  • the optical device LD can be configured such that the orthographic projection of the pixel opening PH on the driving backplate BP is located within the orthographic projection of a reflection reducing aperture BH1 on the driving backplate BP.
  • the boundary of the orthographic projection of the pixel opening PH on the driving backplate BP is located inside the boundary of the orthographic projection of the reflection reducing aperture BH1 on the driving backplate BP, and the distance between the two boundaries is 0.5 ⁇ m-1 ⁇ m, i.e., not less than 0.5 ⁇ m and not greater than 1 ⁇ m.
  • the boundary of the orthographic projection of the pixel opening PH on the driving backplate BP may also coincide with the boundary of the orthographic projection of the reflection reducing aperture BH1 on the driving backplate BP.
  • the anti-reflection layer RL may further include a anti-reflection planarization layer (ROC), which may cover the filter portion CF and the anti-reflection light-absorbing layer BM1 and is used to achieve planarization to facilitate stacking of other layers thereon.
  • ROC anti-reflection planarization layer
  • the ROC may be made of a material such as a transparent optical adhesive, and is not specifically limited herein.
  • the anti-reflection layer RL performs a anti-reflection function through the filter portion CF, eliminating the need for a thick circular polarizer to achieve this function, thereby reducing the overall thickness of the touch display panel.
  • the embodiments of the present disclosure do not preclude the use of a circular polarizer in the anti-reflection layer RL. The specific structure and principle of the circular polarizer will not be described in detail here.
  • the aforementioned anti-reflection layer RL may not be provided, that is, a special film layer may be used to reduce the reflection of ambient light, and the display effect may be improved by increasing the display brightness.
  • the electrode layer TMB is divided into multiple electrode blocks TB by electrode gaps TG. At least some of the electrode blocks TB are distributed along the row direction X and the column direction Y. The electrode blocks TB are used to sense touch operations. At least some of the electrode blocks TB are located within the display area AA, which is both the area for displaying images and the area for touch control.
  • the electrode layer TMB may also include touch leads TL connected to the electrode blocks TB. The touch leads TL extend to the fan-out area FA and connect to the binding portion BA for transmitting touch signals.
  • the touch layer TEL may adopt a capacitive touch structure, and the capacitive touch structure may be a mutual capacitance structure or a self-capacitance structure, as exemplified below:
  • each electrode block TB can be used as a touch electrode
  • the number of touch leads can be the same as the number of electrode blocks TB
  • one end of a touch lead TL is connected to a touch electrode TP
  • the other end can extend to the fan-out area FA.
  • the shape of the electrode block TB can be rectangular or other polygonal. Capacitance can be generated between the electrode block TB and the finger. When the finger touches, the capacitance of the touch area can change, thereby generating a touch sensing signal.
  • the touch leads TL may include first touch leads TL1 and second touch leads TL2.
  • One end of each first touch lead TL1 is connected to a first touch electrode TX, and the other end may extend to the fan-out area FA.
  • One end of each second touch lead TL2 is connected to a second touch electrode RX, and the other end may extend to the fan-out area FA.
  • a first touch electrode TX may be connected to one or two first touch leads TL1. If two first touch leads TL1 are connected, the two first touch leads TL1 may be located on both sides of the display area AA.
  • One of the first touch electrode TX and the second touch electrode RX can be used as a driving electrode, and the other can be used as a sensing electrode.
  • the driving electrode can receive a driving signal to form a capacitor between the adjacent first electrode block TBt and the second electrode block TBr.
  • the capacitance of the touch area can change, and the sensing electrode can send a touch sensing signal.
  • a first touch electrode TX may include multiple (at least two) electrode rows Th distributed along the column direction Y.
  • An electrode row Th includes multiple first electrode blocks TBt distributed along the row direction X and an electrode connecting portion TBc connecting two adjacent first electrode blocks TBt.
  • the electrode connecting portion TBc may be a continuous integral structure. It may also include a plurality of connectors distributed at intervals along the column direction Y, and the connector of the same electrode connecting portion TBc may be connected to two adjacent first electrode blocks TBt at the same time.
  • the electrode rows Th of the same first touch electrode TX can be connected, and the first electrode blocks TBt of the same first touch electrode TX can be connected into a conductive whole, so that they can be connected to the first touch electrode TX through a first touch lead TL1; for example, the first electrode blocks TBt located at the end (the same end) of each electrode row Th can be connected in the column direction Y.
  • a second touch electrode RX may include multiple (at least two) electrode columns Rh distributed and connected along the row direction X.
  • Each electrode column Rh may include multiple second electrode blocks TBr spaced apart along the column direction Y and a transfer bridge TBb connecting two adjacent second electrode blocks TBr.
  • the transfer bridge TBb may be a continuous, integral structure or may include multiple bridges spaced apart along the row direction X. The bridges of the same transfer bridge TBb may simultaneously connect to two adjacent second electrode blocks TBr.
  • the electrode columns Rh of the same second touch electrode RX can be connected, and the second electrode blocks TBr of the same second touch electrode RX can be connected into a conductive whole, so that they can be connected to the second touch electrode RX through a second touch lead TL2.
  • the second electrode blocks TBr of each electrode column Rh located at the end (the same end) away from the fan-out area FA can be connected in the row direction X.
  • the first touch electrodes TX and the second touch electrodes RX are arranged to intersect with each other via electrode connecting portions TBc and transfer bridges TBb, and the electrode connecting portions TBc and transfer bridges TBb are located on different, insulated layers.
  • the touch layer further includes a transfer layer TMA and an isolation layer TLD, wherein:
  • the transfer layer TMA is disposed on the light-emitting side of the display substrate PNL, and the transfer bridge TBb is located on the transfer layer TMA.
  • the isolation layer TLD overlies the transfer layer TMA. Its material can be inorganic insulating materials such as silicon nitride, silicon oxide, or silicon oxynitride, or organic insulating materials such as optical adhesives. There are no specific limitations here, as long as it is insulating.
  • the electrode layer TMB is disposed on the surface of the isolation layer TLD distal from the display substrate PNL, thereby being insulated from the transfer layer TMA.
  • the electrode connecting portion TBc is located on the electrode layer TMB. In other words, the electrode layer TMB includes not only the electrode blocks TB but also the electrode connecting portion TBc.
  • the electrode connecting portion TBc and the first electrode block TBt to which it is connected can be an integral structure.
  • the touch lead TL may be a single-layer structure, which may be located on the transfer layer TMA or the electrode layer TMB, or, as shown in FIG. 23 and FIG. 24 ,
  • the touch lead TL can also have a multilayer structure comprising multiple conductive layers.
  • the touch lead TL may include a first line body TLs1 located on the transfer layer TMA and a second line body TLs2 located on the electrode layer TMB.
  • the first line body TLs1 and the second line body TLs2 extend along the same path and are connected by a contact hole TLH passing through the isolation layer TLD.
  • the multilayer structure helps reduce the resistance of the touch lead TL.
  • Each touch lead TL can adopt the multilayer structure described above, or some can adopt a multilayer structure and some a single-layer structure.
  • the transition layer (TMA) and the electrode layer (TMB) can be single-layer or multi-layer conductive structures.
  • the electrode layer (TMB) can include two outer layers and an intermediate layer located between the two outer layers.
  • the outer layers can be made of titanium, and the intermediate layer can be made of aluminum, meaning the electrode layer (TMB) has a Ti/Al/Ti structure.
  • the outer layers can be made of indium tin oxide (ITO), and the intermediate layer can be made of aluminum, meaning the electrode layer (TMB) has an ITO/Ag/ITO structure.
  • the transition layer (TMA) has a multi-layer structure, it can also have a Ti/Al/Ti structure or an ITO/Ag/ITO structure.
  • the touch layer TEL may further include a touch buffer layer TBU and a touch flat layer TOC, wherein:
  • the buffer layer TBU can be provided on the light-emitting side of the display substrate PNL.
  • the material thereof can include inorganic insulating materials such as silicon nitride, silicon oxide, and silicon oxynitride, and is used to prevent impurities on the side of the touch layer TEL close to the display substrate PNL from affecting the formation of the touch layer TEL.
  • the touch planarization layer (TOC) can cover either the electrode layer (TMB) or the transition layer (TMA), depending on the relative positions of the transition layer (TMA) and the electrode layer (TMB). If the transition layer (TMA) is located on the side of the electrode layer (TMB) closer to the display substrate (PNL), the touch planarization layer (TOC) covers the electrode layer (TMB).
  • the touch planarization layer (TOC) is used to achieve planarization for stacking other film layers.
  • the touch planarization layer (TOC) can be made of materials such as light-transmitting optical adhesive, without specific limitations.
  • the touch layer TEL may not be provided with either the touch buffer layer TBU or the touch flat layer TOC.
  • the electrode layer TMB may have a mesh structure formed by intersecting grid lines NHL, having a plurality of mesh holes NH.
  • One mesh hole NH may overlap at least one light-emitting device LD.
  • the mesh holes NH may overlap with the pixel opening PH in a one-to-one correspondence, and the mesh holes NH may be no smaller than the overlapping pixel opening PH. This allows light emitted by the light-emitting device LD to pass through the mesh holes NH.
  • the transition layer TMA may also have a mesh structure formed by intersecting grid lines NHL, having a plurality of mesh holes NH.
  • the first gap TG1 and the second gap TG2 can be formed by forming sub-breaks TCs that cut off the grid lines NHL on part of the grid lines NHL in the electrode layer TMB, and the mesh NH surrounded by the sub-breaks and the grid lines NHL on which they are located is connected, and one electrode break TC can be divided into Two sub-breaks TCs.
  • the first gap TG1 and the second gap TG2 are formed by sub-breaks TCs distributed along a certain track and meshes NH connected by the sub-breaks TCs.
  • two adjacent first electrode blocks TBT in the same electrode row Th are connected by the electrode connecting portion TBc, and the two first electrode blocks TBT and the electrode connecting portion TBc can be an integrated structure. Therefore, the electrode gap TG does not cut off the electrode connecting portion TBc, so that the two first electrode blocks TBT are not separated by the electrode gap TG, but the first electrode block TBT is surrounded by the electrode gap TG except for the area connected to the electrode connecting portion TBc, so that the outline of the first electrode block TBT is mainly formed by the division of the electrode gap TG.
  • the electrode gap TG mentioned above divides the electrode block TB, and it does not require that any two electrode blocks TB are completely cut off by the electrode gap TG, as long as at least two independent electrode blocks TB are divided.
  • the first electrode block TBT and the electrode connecting portion TBc of the same electrode row Th are an integrated structure, it is independent of any second electrode block TBr, that is, it is separated.
  • the mesh NH overlapping with the larger light-emitting device LD is larger than the mesh NH overlapping with the smaller light-emitting device LD; that is, the larger the light-emitting device LD, the larger the mesh NH overlapping with it.
  • the edges of the first electrode block TBT and the second electrode block TBr may be provided with interdigitated fingers spaced circumferentially.
  • a portion of the interdigitated fingers of the first electrode block TBT may be located between a portion of the interdigitated fingers of the second electrode block TBr, but not in contact with each other, so that the interdigitated fingers of the first electrode block TBT and the interdigitated fingers of the second electrode block TBr are alternately arranged.
  • the interdigitated fingers can make the extension trajectory of the gap between the first electrode block TBT and the second electrode block TBr more tortuous, which is beneficial for increasing the capacitance between the two and improving the sensitivity of the touch sensing operation. Furthermore, for the embodiment in which the above-mentioned dummy electrode TD exists, the dummy electrode TD may extend along the electrode gap TG extending along the zigzag trajectory defined by the interdigitated fingers.
  • the touch layer TEL can be directly disposed on the surface of the encapsulation layer TFE away from the driving back plate BP, and the anti-reflection layer RL can be disposed on the touch layer TEL away from the driving back plate BP.
  • the anti-reflection layer RL uses the filter portion CF and anti-reflection light-absorbing layer BM1 described above, the anti-reflection light-absorbing layer BM1 can be used to shield the electrode layer TMB from reflecting ambient light, eliminating the need for a light-absorbing film layer in the touch layer TEL.
  • this method helps simplify the structure of the touch layer TEL, reducing manufacturing difficulty and cost; on the other hand, because the touch layer TEL is close to the light-emitting device LD, the second electrode CAT of the light-emitting device LD increases the load on the touch layer TEL. Signals from the second electrode CAT and other film layers reduce the signal-to-noise ratio (SNR) of the touch layer TEL signal, causing interference with the touch function.
  • SNR signal-to-noise ratio
  • the first light-absorbing layer BM2 may further include first light-transmitting holes BH2 that overlap with the light-emitting devices LD.
  • the first light-transmitting holes BH2 may overlap with the pixel openings PH in a one-to-one correspondence.
  • the orthographic projection of a pixel opening PH on the driving backplane BP may be located within the orthographic projection of the overlapping first light-transmitting holes BH2 on the driving backplane BP, thereby preventing the first light-absorbing layer BM2 from blocking the light-emitting devices LD.
  • the first light-transmitting holes BH2 can also give the first light-absorbing layer BM2 a mesh structure, covering the grid lines of the mesh-structured electrode layer TMB.
  • the inventors have found that when performing touch operations based on the touch layer TEL with the first light absorbing layer BM2, touch anomalies may sometimes occur.
  • the material of the first light absorbing layer BM2 is difficult to ensure complete insulation and has weak conductivity.
  • the resin mixed with carbon black can be regarded as an insulating material, it still has weak conductivity. If the first light absorbing layer BM2 directly covers On the surface of the electrode layer TMB, where the two are in direct contact, this weak conductivity could cause a short circuit between adjacent electrode blocks TB, leading to touch anomalies.
  • an insulating layer can be applied to the electrode layer TMB.
  • the width of the electrode gap TG is the distance between its two sides, that is, the distance between two electrode blocks separated by the electrode gap TG.
  • the width of the electrode gap TG can be the distance between the closest regions of the two electrode blocks, such as the width of the electrode cutout TC.
  • the electrode gap TG includes an electrode break TC that cuts off the grid line NHL.
  • the first light absorption layer BM2 forms a light absorption break BC in the area corresponding to the electrode break TC, and the light absorption break BC can be distributed along the distribution direction of the electrode gap TG; at the same time, the mesh holes NH of the electrode layer TMB are surrounded by the grid lines NHL.
  • the first light absorption layer BM2 is a mesh structure surrounded by absorption lines.
  • the mesh holes of the mesh structure are the first light-transmitting holes BH2, and the first light-transmitting holes BH2 are surrounded by absorption lines BML.
  • the light absorption break BC cuts off part of the absorption line, so that the light absorption break BC can connect part of the first light-transmitting holes BH2, thereby forming a light absorption gap BG.
  • the touch planarization layer TOC covers the first light absorption layer BM2 and fills the first light transmission hole BH2 to achieve planarization.
  • the side wall of the light-absorbing fracture BC may include a top surface ST perpendicular to the width direction and two arc-shaped transition surfaces SC smoothly connected to both sides of the top surface ST.
  • the two transition surfaces SC are smoothly connected to the two side walls SS of the absorption line BML where the light-absorbing fracture BC is located, and the top surfaces of the two side walls of the light-absorbing fracture BC are parallel.
  • the side wall of the light-absorbing fracture BC may also include a top surface ST perpendicular to the width direction and two transition surfaces SC connected to both sides of the top surface ST.
  • the two transition surfaces SC are connected to the two side walls SS of the absorption line BML where the light-absorbing fracture BC is located.
  • the transition surface SC is a plane that has a certain angle (not 0°) with the top surface ST; the top surfaces ST of the two side walls of the light-absorbing fracture BC are parallel.
  • the side wall of the light-absorbing fracture BC may also include a first top surface ST1 perpendicular to the width direction and a second top surface ST2 connected to one side of the first top surface ST1 at a certain angle (not 0°) to the first top surface ST1; the two first top surfaces ST1 of the two side walls of the light-absorbing fracture BC are parallel, and the two second top surfaces ST2 are parallel.
  • the sidewalls of the electrode gap TG are not necessarily completely perpendicular to the display substrate PNL, but rather form a slope that causes the electrode gap TG to shrink in a direction close to the display substrate PNL.
  • the slope causes the sidewalls of the electrode block TB to expand in a direction close to the display substrate PNL.
  • the boundary of the positive projection of the light absorbing gap BG on the display substrate PNL can be located inside the boundary of the positive projection of the electrode gap TG on the display substrate PNL, that is, the width of the light absorbing gap BG is smaller than the width of its corresponding electrode gap TG, that is, the positive projection of the light absorbing gap BG on the display substrate PNL is located within the positive projection of the electrode gap TG on the display substrate PNL, and is spaced apart from the boundary of the positive projection of the electrode gap TG on the display substrate PNL.
  • the first light absorbing layer BM2 can extend into the electrode gap TG, thereby not only covering the electrode gap TG, but also covering the electrode gap TG on the display substrate PNL.
  • the electrode layer TMB is away from the surface of the display substrate PNL and can also cover the sidewalls of the electrode layer TMB, thereby enclosing the surface of the electrode layer TMB except the surface in contact with the anti-reflection layer RL to reduce reflection of ambient light.
  • the number of light absorption gaps BG can be one or more (no less than two). If multiple light absorption gaps BG are used, each light absorption gap BG can be distributed along the width direction of the electrode gap TG.
  • the orthographic projection of each light absorption gap BG on the display substrate PNL is located within the orthographic projection of the electrode gap TG on the display substrate PNL.
  • the first light absorption layer BM2 is interrupted by the multiple light absorption gaps BG, which can further reduce the risk of short circuits.
  • the width direction is the direction perpendicular to the boundaries of the electrode gap TG. Furthermore, the width direction can be the extension direction of the line connecting the two ends of the electrode break TC and its extension line.
  • the aforementioned dummy electrode TD is disposed within the electrode gap TG.
  • Two light absorption gaps BG are provided, including a first light absorption gap BG1 overlapping the first gap TG1 and a second light absorption gap BG2 overlapping the second gap TG2. This allows the first light absorption layer BM2 to be interrupted by the first and second light absorption gaps BG1 and BG2, reducing the risk of short circuits.
  • the orthographic projection of the first light absorption gap BG1 onto the display substrate PNL can be positioned within the orthographic projection of the first gap TG1
  • the orthographic projection of the second light absorption gap BG2 onto the display substrate PNL can be positioned within the orthographic projection of the second gap TG2, minimizing reflection of ambient light.
  • the width of the first light absorption gap BG1 can be smaller than the first gap TG1 it overlaps with
  • the width of the second light absorption gap BG2 can be smaller than the second gap TG2 it overlaps with, allowing the first light absorption layer BM2 to cover the sidewalls of the sub-fracture.
  • the number of light absorption gaps BG is two, including a first light absorption gap BG1 overlapping with the first gap TG1 and a second light absorption gap BG2 overlapping with the second gap TG2.
  • the orthographic projection of the first light absorption gap BG1 on the display substrate PNL can be located within the orthographic projection of the first gap TG1 on the display substrate PNL
  • the second light absorption gap BG2 can be located within the orthographic projection of the second gap TG2 on the display substrate PNL.
  • the orthographic projection of gap BG2 on the display substrate PNL lies within the orthographic projection of second gap TG2 on the display substrate PNL, minimizing reflection of ambient light. Furthermore, the width of the first light-absorbing gap BG1 can be smaller than the overlapping first gap TG1, and the width of the second light-absorbing gap BG2 can be smaller than the overlapping second gap TG2. The sidewalls of the sub-fracture can be covered by the first light-absorbing layer BM2.
  • a light absorption gap BG for a light absorption gap BG, at least two regions of the boundary of its orthographic projection on the display substrate PNL can be at different distances from the boundary of the orthographic projection of the electrode gap TG on the display substrate PNL, making the light absorption gap BG more tortuous. Even if the light absorption gap BG has reflections, the visual interference can be reduced by making the light absorption gap BG more tortuous. For example:
  • the electrode layer TMB has the mesh structure described above.
  • the light-absorbing fractures BC that constitute the light-absorbing gap BG at least some of these fractures BC may be staggered across the width of the electrode gap TG. That is, the light-absorbing fractures BC may not be located in the center of the electrode gap TG, but may be offset to either side.
  • the light-absorbing fractures BC of the overlapping light-absorbing gaps BG may be located in at least two of the following three positions:
  • the centerline of the light-absorbing fracture BC and the centerline of the electrode gap TG coincide with their orthographic projections on the display substrate PNL.
  • the centerlines of the light-absorbing fracture BC and the electrode gap TG are spaced apart, meaning they do not coincide. This reduces the clutter in areas where reflections may occur, reducing interference with the display.
  • each light absorption fracture BC of the light absorption gap BG is located on the same side of the center line of the electrode gap TG.
  • the width of the light absorption fracture BC is less than half the width of the electrode fracture TC.
  • the side wall of the first light-transmitting hole BH2 may be a slope that converges toward the display substrate PNL, so that the refractive index of the touch flat layer TOC can be greater than the refractive index of the first light-absorbing layer BM2, so that part of the light emitted by the light-emitting device LD is totally reflected at the contact interface between the touch flat layer TOC and the side wall of the first light-transmitting hole BH2, thereby realizing light convergence, which is beneficial to improving the brightness of the front of the touch display panel.
  • the touch display panel may further include a second light absorbing layer BM3 and a transparent flat layer EOC, which may be disposed on the surface of the touch flat layer TOC away from the display substrate PNL.
  • the second light absorbing layer BM3 may be made of a black resin or other light-absorbing material, and may be made of the same material as the first light absorbing layer BM2.
  • the second light absorbing layer BM3 may have a plurality of second light-transmitting holes BH3, with each second light-transmitting hole BH3 overlapping with each first light-transmitting hole BH2, and the two may have a one-to-one correspondence.
  • the sidewalls of the second light-transmitting holes BH3 may be sloped surfaces that converge toward the display substrate PNL.
  • the orthographic projection of the pixel opening PH on the driving backplane BP can be located within the orthographic projection of a first light-transmitting hole BH2 on the driving backplane BP, and the orthographic projection of a first light-transmitting hole BH2 on the driving backplane BP is located within the orthographic projection of a second light-transmitting hole BH3 on the driving backplane BP.
  • the above-mentioned refractive index is the same and is based on light of the same wavelength, which may be 550 nm, or other values.
  • the present disclosure also provides a touch display device, which may include the touch display panel of any of the aforementioned embodiments.
  • the specific structure and beneficial effects of the touch display panel can be referenced above with respect to the touch display panel embodiments and will not be further described here.
  • the display device of the present disclosure can be a medium-to-large touch display device such as a tablet computer, a laptop computer, or an in-vehicle display. It can also be used in other electronic devices with touch display capabilities, such as mobile phones and smart watches, which are not listed here.

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Abstract

一种触控显示面板及显示装置,涉及触控技术领域。触控显示面板包括显示基板和触控层,显示基板包括沿行方向和列方向分布的多个发光器件;触控层设于显示基板的出光侧,且包括电极层和第一吸光层;电极层通过电极间隙分割出多个电极块;第一吸光层覆盖电极层的表面,且开设有与电极间隙交叠的吸光间隙和与发光器件交叠的第一透光孔,吸光间隙沿电极间隙的延伸方向延伸。可降低对环境光的反射。 (图2)

Description

触控显示面板及触控显示装置 技术领域
本公开涉及触控技术领域,具体而言,涉及一种触控显示面板及触控显示装置。
背景技术
触控显示面板已经广泛的应用于手机、平板电脑等终端设备,在显示图像的同时,可通过触控操作实现人机交互。现有技术中,触控显示面板会反射环境光,而反射的环境光会影响显示效果。
需要说明的是,在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解,因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本公开提供一种触控显示面板及触控显示装置。
根据本公开的一个方面,提供一种触控显示面板,包括:
显示基板,包括沿行方向和列方向分布的多个发光器件;
触控层,设于所述显示基板的出光侧,且包括电极层和第一吸光层;所述电极层通过电极间隙分割出多个电极块;所述第一吸光层覆盖所述电极层的表面,且开设有与所述电极间隙交叠的吸光间隙和与所述发光器件交叠的第一透光孔,所述吸光间隙沿所述电极间隙的延伸方向延伸。
在本公开的一种示例性实施方式中,所述吸光间隙在所述显示基板上的正投影位于所述电极间隙在所述显示基板上的正投影以内,且与所述电极间隙在所述显示基板上的正投影的边界间隔分布。
在本公开的一种示例性实施方式中,所述吸光间隙的数量为多个,且沿所述电极间隙的宽度方向分布;各所述吸光间隙在所述显示基板上的正投影位于所述电极间隙在所述显示基板上的正投影以内。
在本公开的一种示例性实施方式中,所述吸光间隙在所述显示基板上的正投影的边界的至少两个区域与所述电极间隙在所述显示基板上的 正投影的边界的距离不同。
在本公开的一种示例性实施方式中,所述吸光间隙在所述显示基板上的正投影的中心线与所述电极间隙在所述显示基板上的正投影的中心线间隔分布。
在本公开的一种示例性实施方式中,所述电极层还包括:
虚设电极,设于所述电极间隙内,且沿所述电极间隙的延伸方向延伸;所述虚设电极将所述电极间隙分割为第一间隙和第二间隙;
所述吸光间隙包括与所述第一间隙交叠的第一吸光间隙和与所述第二间隙交叠的第二吸光间隙。
在本公开的一种示例性实施方式中,所述电极层为由交叉的网格线形成的网状结构,所述第一透光孔与所述网状结构的网孔交叠;
所述电极间隙由截断部分所述网格线的电极断口形成;所述第一吸光层在对应所述电极断口的区域形成吸光断口,所述吸光间隙由所述吸光断口形成。
在本公开的一种示例性实施方式中,各所述发光器件中至少包括两种大小不同的发光器件,且大小不同的发光器件的发光颜色不同;各所述网孔中至少包括两种大小不同的网孔,一所述网孔与一所述发光器件交叠;
在与大小不同的两个所述发光器件交叠的网孔中,与较大的发光器件交叠的网孔大于与较小的发光器件交叠的网孔;所述吸光间隙至少截断大小不同的两种网孔。
在本公开的一种示例性实施方式中,所述触控显示面板具有显示区和位于所述显示区外的外围区,所述外围区具有与所述显示区沿所述列方向分布的扇出区;所述扇出区具有绑定部;至少部分所述电极块位于所述显示区;
所述电极层还包括与所述电极块连接的触控引线,所述触控引线延伸至所述扇出区,并与所述绑定部连接;所述第一吸光层在对应于相邻两所述触控引线之间的区域断开设置。
在本公开的一种示例性实施方式中,所述第一吸光层覆盖所述触控引线远离所述显示基板的表面和所述触控引线的侧壁。
在本公开的一种示例性实施方式中,各所述电极块中包括多个第一电极块和多个第二电极块;所述触控层包括沿所述列方向间隔分布的多个第一触控电极和沿所述行方向间隔分布的多个第二触控电极;所述第一触控电极和所述第二触控电极在交叉处绝缘设置;所述第一触控电极包括多个所述第一电极块,所述第二触控电极包括多个所述第二电极块;所述电极间隙分隔所述第一电极块和所述第二电极块。
在本公开的一种示例性实施方式中,一所述第一触控电极包括沿所述列方向分布且连接的多个电极行,一所述电极行包括沿所述行方向分布的多个所述第一电极块以及连接相邻两所述第一电极块的电极连接部;
一所述第二触控电极包括沿所述行方向分布且连接的多个电极列,一所述电极列包括沿所述列方向间隔分布的多个第二电极块以及连接相邻两所述第二电极块的转接桥;
所述第一触控电极和所述第二触控电极通过所述电极连接部与所述转接桥交叉,且所述电极连接部与所述转接桥位于相互绝缘的不同层。
在本公开的一种示例性实施方式中,所述触控层还包括:
转接层,设于所述显示基板的出光侧;所述转接桥位于所述转接层;
隔离层,覆盖所述转接层;所述电极层设于所述隔离层远离所述显示基板的表面;所述电极连接部位于所述电极层;
至少一个所述触控引线包括位于所述转接层的第一线体和位于所述电极层的第二线体,所述第一线体和所述第二线体通过穿过所述隔离层的接触孔连接。
在本公开的一种示例性实施方式中,所述触控层还包括:
触控平坦层,覆盖所述第一吸光层,且填充所述第一透光孔;所述触控平坦层的折射率大于所述第一吸光层的折射率。
在本公开的一种示例性实施方式中,所述触控显示面板还包括:
第二吸光层,设于所述触控平坦层远离所述显示基板的表面,且具有多个第二透光孔,一所述第二透光孔与一所述第一透光孔交叠;
透明平坦层,覆盖所述第二吸光层,且填充所述第二透光孔;所述透明平坦层的折射率大于所述第二吸光层的折射率。
在本公开的一种示例性实施方式中,所述显示基板包括:
驱动背板;
像素定义层,与所述发光器件设于所述驱动背板同一侧,且具有限定各所述发光器件范围的像素开口;
一所述像素开口在所述驱动背板上的正投影位于一所述第一透光孔在所述驱动背板上的正投影以内,所述第一透光孔在所述驱动背板上的正投影位于一所述第二透光孔在所述驱动背板上的正投影以内。
在本公开的一种示例性实施方式中,所述触控显示面板还包括:
降反层,设于所述显示基板的出光侧,所述触控层设于所述降反层远离所述显示基板的一侧;所述降反层包括多个滤光部,一所述滤光部与一所述发光器件交叠,任一所述滤光部的颜色和与其交叠的所述发光器件的发光颜色相同。
在本公开的一种示例性实施方式中,所述显示基板包括:
驱动背板;
像素定义层,与所述发光器件设于所述驱动背板同一侧,且具有限定各所述发光器件范围的像素开口;
所述降反层还包括:
降反吸光层,设于所述显示基板的出光侧,且具有多个降反孔,任一所述滤光部至少部分限定于一所述降反孔内;一所述降反孔与一所述像素开口交叠;
一所述像素开口在所述驱动背板上的正投影位于一所述降反孔在所述驱动背板上的正投影以内。
在本公开的一种示例性实施方式中,所述像素开口在所述驱动背板上的正投影的边界与所述降反孔在所述驱动背板上的正投影的边界的距离为0.5μm-1μm。
根据本公开的一个方面,提供一种触控显示装置,包括上述任意一项所述的触控显示面板。
应当理解的是,以上的一般描述和后文的细节描述仅是示例性和解释性的,并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分,示出了符合本公开的实施例,并与说明书一起用于解释本公开的原理。显而易见地,下面描述中的附图仅仅是本公开的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本公开触控显示面板一实施方式的俯视图。
图2为本公开触控显示面板一实施方式的中触控层的俯视示意图。
图3为本公开触控显示面板一实施方式的中触控层的局部放大图。
图4为本公开触控显示面板一实施方式的局部截面图。
图5为本公开触控显示面板第一种实施方式的局部放大图。
图6为图5中电极层的俯视图。
图7为图5中第一吸光层的俯视图。
图8为图5的一种实施方式的A-A截面图。
图9为图5的一种实施方式的B-B截面图。
图10为图5的另一种实施方式的A-A截面图。
图11为图5的另一种实施方式的B-B截面图。
图12为本公开触控显示面板第二种实施方式的局部放大图。
图13为图12中电极层的俯视图。
图14为图12中第一吸光层的俯视图。
图15为本公开触控显示面板第三种实施方式的局部放大图。
图16为图15中第一吸光层的俯视图。
图17为本公开触控显示面板第四种实施方式的局部放大图。
图18为图17中第一吸光层的俯视图。
图19-图22分别为第一至第四种吸光间隙的示意图。
图23为本公开触控显示面板一实施方式中触控引线的局部放大图。
图24为图23的C-C截面图。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而,示例实施方式能够以多种形式实施,且不应被理解为限于在此阐述的实施方式;相反, 提供这些实施方式使得本公开将全面和完整,并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构,因而将省略它们的详细描述。此外,附图仅为本公开的示意性图解,并非一定是按比例绘制。
虽然本说明书中使用交叠性的用语,例如“上”“下”来描述图标的一个组件对于另一组件的交叠关系,但是这些术语用于本说明书中仅出于方便,例如根据附图中所述的示例的方向。能理解的是,如果将图标的装置翻转使其上下颠倒,则所叙述在“上”的组件将会成为在“下”的组件。当某结构在其它结构“上”时,有可能是指某结构一体形成于其它结构上,或指某结构“直接”设置在其它结构上,或指某结构通过另一结构“间接”设置在其它结构上。
用语“一个”、“一”、“该”、“所述”和“至少一个”用以表示存在一个或多个要素/组成部分/等;用语“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等;用语“第一”、“第二”和“第三”等仅作为标记使用,不是对其对象的数量限制。
本文中的行方向X和列方向Y为两个交叉的方向,在本公开的附图中,行方向X为横向,列方向Y为纵向,二者相互垂直,但并不限于此,行方向X和列方向Y也可以是不垂直的方向。此外,本领域技术人员可以知晓,随着显示面板的旋转,行方向X和列方向Y的实际朝向可能发生变化,但二者的相对位置不变。
本文中的A特征和B特征“交叠”是指A特征在一平面上的正投影和B特征在该平面上的正投影至少部分重合;该平面可以是显示基板、驱动背板、衬底等的表面。
本文中的A和B“同层设置”是指A和B属于同一膜层中连续或断开的不同区域,各区域可同时形成;A和B位于“不同层”是指A和B属于不同膜层,不同膜层是指不同时形成的膜层。
本公开实施方式提供了一种触控显示面板,如图1所示,触控显示面板包括显示区AA和位于显示区AA外的外围区WA,外围区WA可以是围绕显示区AA的连续环形区域;也可以是不连续地围绕于显示区 AA外的区域,例如,外围区WA可分布于显示区AA的两侧。显示区AA可用于发光,以显示图像,外围区WA则不发光。
外围区WA为围绕于显示区AA外的连续的环形区域,其可包括与显示区AA沿列方向Y分布的扇出区FA,例如,外围区WA可由扇出区FA和呈U形的周边区围成。扇出区FA具有绑定部BA,绑定部BA可具有多个导电触片,导电触片可通过柔性电路板与驱动电路板连接,或者直接与驱动电路板连接;驱动电路板、柔性电路板和扇出区FA之一可设有控制图像显示的显示芯片。
在一些实施方式中,扇出区FA内可具有沿行方向X延伸的弯折区,弯折区为可弯折的柔性结构,绑定部BA位于弯折区远离显示区AA的一侧。通过使弯折区弯折,可将扇出区FA弯折至触控显示面板的背光侧,即与出光方向相反的一侧;从而可在触控显示面板的背光侧与绑定部BA连接。
如图8-图11所示,触控显示面板可包括用于显示图像的显示基板PNL,其可包括驱动背板BP和设于驱动背板BP一侧的多个发光器件LD,其中:
驱动背板BP具有驱动电路,通过驱动电路可驱动发光器件LD发光,以显示图像。在本公开的一些实施方式中,驱动背板BP可包括衬底和位于衬底一侧的电路层,衬底可为平板结构,其材料可以是玻璃等硬质材料,也可以是聚酰亚胺等柔性材料。同时,衬底可以是单层或多层结构。
电路层包括上述的驱动电路,举例而言,驱动电路可包括位于显示区AA的像素电路和位于外围区WA的外围电路,其中,像素电路可以是3T1C、7T1C、8T1C等结构,只要能驱动发光器件LD发光即可,在此不对其结构做特殊限定,其中,nTmC表示一个像素电路包括n个薄膜晶体管(用字母“T”表示)和m个电容(用字母“C”表示)。像素电路的数量可与发光器件LD的数量相同,且一一对应地与各发光器件LD连接。当然,同一像素电路也可连接多个发光器件LD,在此不做特殊限定。
外围电路与像素电路连接,用于向像素电路输入驱动信号,以便控 制发光器件LD发光。外围电路可包括栅极驱动电路和发光控制电路,当然,还可包括其它电路,在此不对外围电路的具体结构做特殊限定。
上述的驱动电路可包括多个薄膜晶体管和电容,其中,薄膜晶体管可以是顶栅或底栅型薄膜晶体管,每个薄膜晶体管均可包括交叠设置的有源层和栅极,各薄膜晶体管的有源层同层设置于同一半导体层;或者,也可以设置在多个半导体层,不同薄膜晶体管的有源层可分布在不同的半导体层。半导体层的材料可以是多晶硅,也可以是金属氧化物,在此不做特殊限定。
电路层还可包括与像素电路和外围电路连接的用于传输信号的走线,例如,一列像素电路可与一个沿列方向Y延伸的数据线连接,通过数据线可传输数据信号,数据线可延伸至扇出区FA,并与绑定部BA连接,栅极驱动电路和发光控制电路可与时钟信号线等多个走线连接,这些走线也可延伸至扇出区FA,并与绑定部BA连接。
以顶栅型薄膜晶体管为例,在一些实施方式中,电路层可包括沿背离衬底的方向依次堆叠设置的半导体层、第一栅绝缘层、第一栅极层、第二栅绝缘层、第二栅极层、层间介质层、第一源漏层、钝化层、第一平坦层、第二源漏层和第二平坦层,薄膜晶体管的有源层位于半导体层,栅极位于第一栅极层,电容的两个极板位于第一栅极层和第二栅极层,第一源漏层和第二源漏层用于在至少部分薄膜晶体管之间以及薄膜晶体管和电容之间实现连接,且用于传输驱动信号,驱动信号的类型和各膜层的具体图案视驱动电路的具体构成而定,在此不做特殊限定。
如图8-图11所示,发光器件LD可以是采用有机发光材料的OLED(有机发光二极管),也可以是采用无机发光材料的Mini LED(次毫米发光二极管,尺寸为100μm-200μm)、Micro LED(微型发光二极管,尺寸不大于100μm)和LED(发光二极管,尺寸大于200μm)等,在此不做特殊限定,只要能够发光即可。发光器件LD位于显示区AA内,当然,也可以存在部分发光器件LD位于外围区WA,但位于外围区WA的发光器件LD可以浮接,而不发光。
以发光器件LD采用OLED为例,发光器件LD可包括沿远离驱动背板BP的方向依次堆叠的第一电极ANO、发光层EL和第二电极CAT, 通过向第一电极ANO和第二电极CAT施加电信号,可激发发光层EL发光,具体发光原理在此不再详述。第一电极ANO可作为阳极,第二电极CAT可作为阴极,二者的材料包括金属、金属氧化物等导电材料。发光层EL可包括沿远离驱动背板BP的方向依次层叠的空穴注入层、空穴传输层、发光材料层、电子传输层和电子注入层。当然,也可以采用其它结构,只要能与第一电极ANO和第二电极CAT配合发光即可。
发光器件LD可采用顶发射结构,即第一电极ANO可采用反光结构,而第二电极CAT为透光结构,使得发光器件LD向远离驱动背板BP的方向出光;此时,显示基板PNL的出光侧即为发光器件LD远离驱动背板BP的一侧,背光侧为驱动背板BP远离发光器件LD的一侧。或者,发光器件LD也可采用底发射结构,即第二电极CAT可采用反光结构;而第一电极ANO为透光结构,使得发光器件LD向驱动背板BP出光,此时,显示基板PNL的出光侧即为驱动背板BP远离发光器件LD的一侧,背光侧为发光器件LD远离驱动背板BP的一侧。本文中仅以顶发射结构的发光器件LD为例进行说明。
需要说明的是,上述针对第一电极ANO和第二电极CAT的反光结构和透光结构,并不意味着反射率和透射率达到100%,透光结构可以存在一定的反射作用,反射结构也可以存在一定的透射。
如图8-图11所示,显示基板还可包括分隔发光器件LD的像素定义层PDL,其可与发光器件LD设于驱动背板BP的同一侧,例如,像素定义层PDL可与第一电极ANO设于第二平坦层远离衬底的表面。同时,像素定义层PDL的厚度大于第一电极ANO的厚度,并覆盖各第一电极ANO的部分区域,且像素定义层PDL具有露出各第一电极ANO的像素开口PH,一个像素开口PH露出一个第一电极ANO。
发光层EL和第二电极CAT在像素开口PH内依次堆叠在第一电极ANO上。在一些实施方式中,发光层EL为间断的结构,每个发光器件LD的发光层EL分别独立间隔设置,不同发光器件LD的发光颜色可以不同;第二电极CAT为连续的整层结构,且第二电极CAT位于像素开口PH内的部分覆盖发光层EL,第二电极CAT位于像素开口PH外的部分还可覆盖像素定义层PDL。发光层EL和第二电极CAT的厚度之和小 于像素定义层PDL的厚度,使得第二电极CAT在像素开口PH处凹陷。
发光器件LD的形状和尺寸均由像素开口PH限定,发光器件LD的范围即为像素开口PH的范围,发光器件LD的大小即为像素开口PH的大小。同时,各发光器件LD中至少包括两种大小不同的发光器件LD,即两种尺寸不同的发光器件LD;大小不同的发光器件LD的发光颜色不同。进一步的,发光器件LD可划分为多个发光单元,一个发光单元可包括至少三个发光器件LD,同一发光单元中至少三个发光器件LD的发光颜色不同;举例而言,一个发光单元包括三个发光器件LD,即发红光的第一发光器件、发蓝光的第二发光器件和发绿光的第三发光器件,三个发光器件LD在驱动背板BP上的正投影的形状均为矩形,且第一发光器件和第二发光器件的正投影的面积大于第三发光器件的正投影的面积,第一发光器件和第二发光器件的正投影的面积可以相同,也可以不同,例如,第一发光器件的正投影的面积大于第二发光器件的正投影的面积。
如图8-图11所示,触控显示面板还包括封装层TFE,其可覆盖各发光器件LD,用于阻隔外界的水汽和氧气,防止发光器件LD被侵蚀。在本公开的一些实施方式中,封装层TFE可采用薄膜封装的方式,其可包括第一无机层CVD1、有机层IJP和第二无机层CVD2,其中:
第一无机层CVD1可覆盖各个发光器件LD,即第一无机层CVD1可覆盖于第二电极CAT远离驱动背板BP的表面,对于间断结构的第二电极CAT而言,第一无机层CVD1还可覆盖像素定义层PDL未被第二电极CAT覆盖的区域;第一无机层CVD1的厚度小于像素定义层PDL的厚度,且可在像素开口PH处凹陷。第一无机层CVD1的材料可以包括氮化硅、氧化硅等无机绝缘材料。
有机层IJP可设于第一无机层CVD1远离驱动背板BP的表面,有机层IJP在驱动背板BP上的正投影的边界可位于外围区WA,确保有机层IJP能覆盖各发光器件LD。
第二无机层CVD2可覆盖有机层IJP和未被有机层IJP覆盖的第一无机层CVD1,可通过第二无机层CVD2阻挡水氧侵入,通过在固化前具有流动性的有机层IJP实现平坦化。第二无机层CVD2的材料可以包括氮化硅、氧化硅等无机绝缘材料。
显示基板PNL的第二电极CAT等膜层会对环境光产生反射,从而影响显示效果;为此,在本公开的一些实施方式中,触控显示面板还可包括降反层RL,其可设于显示基板PNL的出光侧,即封装层TFE远离驱动背板BP的一侧,例如,降反层RL可设于第二无机层CVD2远离驱动背板BP的表面;当然,降反层RL与封装层TFE之间还可以设置其它膜层。通过降反层RL可以减少被显示基板PNL中的第二电极CAT等膜层反射的环境光,从而减少对发光器件LD发出的光线的干扰,改善显示效果。
如图8-图11所示,在本公开的一些实施方式中,可利用滤光材料的滤光作用,吸收外界的环境光和被第二电极CAT反射的环境光,从而降低对环境光的反射。降反层RL可包括多个滤光部CF,每个滤光部CF可透过单色光,而吸收其它颜色的光线。同时,一个滤光部CF可与一个发光器件LD交叠,且任一滤光部CF的颜色和与其交叠的发光器件LD的发光颜色相同,保证每个发光器件LD发出的光线可从与其交叠的滤光部CF出射。通过滤光部CF的滤光作用,可吸收环境光中与其颜色不同的光线,减少照射至第二电极CAT等可反光的膜层的环境光,同时,对于第二电极CAT等膜层反射的环境光,滤光部CF还可以吸收一部分,由此,可起到降低环境光反射的作用,改善显示效果。
降反层RL还可包括降反吸光层BM1,其可设于显示基板PNL的出光侧,且与滤光部CF设于同一表面。降反吸光层BM1可采用黑色的吸光材料,例如,降反吸光层BM1可采用混合有碳黑的树脂,从而可起到吸收光线的作用。降反吸光层BM1具有多个降反孔BH1,任一滤光部CF至少部分限定于一降反孔BH1内,即可利用滤光部CF一一对应地填充各降反孔BH1,从而通过降反吸光层BM1限定各滤光部CF的位置,并防止相邻的滤光部CF之间透光。滤光部CF的厚度与降反孔BH1的深度可以相同,也以不同,在此不做特殊限定。一个降反孔BH1可与一个像素开口PH交叠,使得一个发光器件LD发出的光线可通过与其交叠的滤光部CF出射。
进一步的,如图8和图10所示,为了防止降反吸光层BM1遮挡发 光器件LD,可使像素开口PH在驱动背板BP上的正投影位于一降反孔BH1在驱动背板BP上的正投影以内,例如,像素开口PH在驱动背板BP上的正投影的边界位于降反孔BH1在驱动背板BP上的正投影的边界的内侧,且两个边界的距离为0.5μm-1μm,即不小于0.5μm,且不大于1μm。当然,像素开口PH在驱动背板BP上的正投影的边界位于一降反孔BH1在驱动背板BP上的正投影的边界也可以重合。
进一步的,如图8-图11所示,降反层RL还可包括降反平坦层ROC,其可覆盖滤光部CF和降反吸光层BM1,用于实现平坦化,以便在其上堆叠其它膜层。降反平坦层ROC可采用透光的光学胶等材料,在此不做特殊限定。
在上述实施方式中,降反层RL通过滤光部CF起到降反的作用,可免于采用厚度较大的圆偏光片来实现降反功能,有利于降低触控显示面板整体的厚度。当然,本公开的实施方式中并不排除降反层RL采用圆偏光片,圆偏光片的具体结构及其原理在此不再详述。
此外,在本公开的其它实施方式中,也可以不设置上述的降反层RL,即也可以采用专门的膜层降低对环境光的反射,而可以通过增大显示亮度等方式改善显示效果。
如图8-图11所示,触控显示面板还可包括触控层TEL,其可设于显示基板PNL的出光侧,且触控层TEL可包括电极层TMB,其中:
如图2、图3和图6所示,电极层TMB通过电极间隙TG分割出多个电极块TB,至少部分电极块TB沿行方向X和列方向Y分布。电极块TB用于感应触控操作。至少部分电极块TB位于显示区AA内,显示区AA既是显示图像的区域,也是触控的区域。电极层TMB还可包括与电极块TB连接的触控引线TL,触控引线TL延伸至扇出区FA,并与绑定部BA连接,用于传输触控信号。
触控层TEL可采用电容式触控结构,而电容式触控结构可以是互容结构,也可以是自容结构,下面进行示例性说明:
以自容结构为例,在一些实施方式中,每个电极块TB可作为一个触控电极,触控引线的数量可与电极块TB的数量相同,且一个触控引线TL的一端与一个触控电极TP连接,另一端可延伸至扇出区FA。电 极块TB的形状可为矩形或其他多边形。电极块TB与手指之间可产生电容,在手指触摸时,可使触摸区域的电容发生变化,从而产生触控感应信号。
以互容结构为例,如图2、图3和图6所示,触控层TEL可包括多个第一触控电极TX和第二触控电极RX,各第一触控电极TX可沿行方向X延伸,且沿列方向Y间隔分布;各第二触控电极RX可沿列方向Y延伸,且沿行方向X间隔分布,使得各第二触控电极RX与第一触控电极TX交叉,且二者在交叉处绝缘设置。同时,各电极块TB中包括多个第一电极块TBt和多个第二电极块TBr;第一触控电极TX包括多个第一电极块TBt,第二触控电极RX包括多个第二电极块TBr。
如图2所示,触控引线TL可包括第一触控引线TL1和第二触控引线TL2,一个第一触控引线TL1的一端与一个第一触控电极TX连接,另一端可延伸至扇出区FA。一个第二触控引线TL2的一端与一个第二触控电极RX连接,另一端可至扇出区FA。同一第一触控电极TX可连接一个或两个第一触控引线TL1,且若连接两个第一触控引线TL1,该两个第一触控引线TL1可分布于显示区AA两侧。
第一触控电极TX和第二触控电极RX中的一个可作为驱动电极,另一个作为感应电极,驱动电极可接收驱动信号,在相邻的第一电极块TBt和第二电极块TBr之间形成电容,在手指触摸时,可使触摸区域的电容发生变化,感应电极发出触控感应信号。
在本公开的一些实施方式中,如图2和图3所示,第一触控电极TX可包括多个沿行方向X依次连接的多个第一电极块TBt以及连接相邻两第一电极块TBt的电极连接部TBc,第二触控电极RX可包括沿列方向Y依次连接的多个第二电极块TBr以及连接相邻两第二电极块TBr的转接桥TBb。电极连接部TBc和转接桥TBb位于不同层且交叉设置,使第二触控电极RX与第一触控电极TX交叉且绝缘。
如图2和图3所示,在本公开的一些实施方式中,一个第一触控电极TX可包括沿列方向Y分布的多个(至少两个)电极行Th,一个电极行Th包括沿行方向X分布的多个第一电极块TBt以及连接相邻两第一电极块TBt的电极连接部TBc。电极连接部TBc可以是连续的整体结构, 也可以包括沿列方向Y间隔分布的多个连接体,同一电极连接部TBc的连接体可同时与两个相邻的第一电极块TBt连接。
可使同一第一触控电极TX的各电极行Th连接,将同一第一触控电极TX的第一电极块TBt连成一个导电的整体,从而可通过一个第一触控引线TL1与第一触控电极TX连接;举例而言,可将各电极行Th中位于端部(同一端)的第一电极块TBt在列方向Y上连接。
一个第二触控电极RX可包括沿行方向X分布且连接的多个(至少两个)电极列Rh,一个电极列Rh可包括沿列方向Y间隔分布的多个第二电极块TBr以及连接相邻两第二电极块TBr的转接桥TBb。转接桥TBb可以是连续的整体结构,也可以包括沿行方向X间隔分布的多个桥体,同一转接桥TBb的桥体可同时与两个相邻的第二电极块TBr连接。
可使同一第二触控电极RX的各电极列Rh连接,将同一第二触控电极RX的第二电极块TBr连成一个导电的整体,从而可通过一个第二触控引线TL2与第二触控电极RX连接;举例而言,可将各电极列Rh中位于远离扇出区FA的端部(同一端)的第二电极块TBr在行方向X上连接。
如图3和图4所示,上述的第一触控电极TX和第二触控电极RX通过电极连接部TBc与转接桥TBb交叉设置,且电极连接部TBc与转接桥TBb位于相互绝缘的不同层。举例而言,触控层还包括转接层TMA和隔离层TLD,其中:
转接层TMA设于显示基板PNL的出光侧,转接桥TBb位于转接层TMA。
隔离层TLD覆盖转接层TMA,其材料可以采用氮化硅、氧化硅、氮氧化硅等无机绝缘材料,也可以采用光学胶等有机绝缘材料,在此不做特殊限定,只要绝缘即可。电极层TMB设于隔离层TLD远离显示基板PNL的表面,从而与转接层TMA绝缘设置。电极连接部TBc位于电极层TMB,即电极层TMB除了包括电极块TB,还包括电极连接部TBc,电极连接部TBc及其连接的第一电极块TBt可为一体结构。
进一步的,在一些实施方式中,上述的触控引线TL可为单层结构,其可以位于转接层TMA或电极层TMB,或者,如图23和图24所示, 触控引线TL也可以为包括多个导电层的多层结构;以多层结构为例,触控引线TL可包括位于转接层TMA的第一线体TLs1和位于电极层TMB的第二线体TLs2,第一线体TLs1和第二线体TLs2沿相同的路径延伸,且通过穿过隔离层TLD的接触孔TLH连接。通过多层结构有利于降低触控引线TL的电阻。各触控引线TL都可以采用上述的多层结构,也可以部分采用多层结构,而部分采用单层结构。
此外,在本公开的一些实施方式中,转接层TMA和电极层TMB可互换位置,即转接层TMA位于电极层TMB远离显示基板PNL的一侧,隔离层TLD覆盖电极层TMB。但转接层TMA位于电极层TMB靠近显示基板PNL的一侧会使电极块TB更加远离第二电极CAT,有利于减少信号干扰。
转接层TMA和电极层TMB均可以是单层或多层的导电结构,举例而言,电极层TMB可包括两层外部层和位于两层外部层之间的中间层,外部层的材料可为钛,中间层的材料可为铝,即电极层TMB为Ti/Al/Ti结构;或者,外部层的材料可为铟锡氧化物(ITO),中间层的材料可为铝,即电极层TMB为ITO/Ag/ITO结构。同时,转接层TMA若为多层结构,也可以是Ti/Al/Ti结构、ITO/Ag/ITO结构。
进一步的,如图8-图11所示,在本公开的一些实施方式中,触控层TEL还可包括触控缓冲层TBU和触控平坦层TOC,其中:
缓冲层TBU可设于显示基板PNL的出光侧,其材料可包括氮化硅、氧化硅、氮氧化硅等无机绝缘材料,用于防止触控层TEL靠近显示基板PNL一侧的杂质对触控层TEL的形成造成影响。
触控平坦层TOC可覆盖电极层TMB或转接层TMA,具体视转接层TMA和电极层TMB的相对位置而定,若转接层TMA位于电极层TMB靠近显示基板PNL的一侧,则触控平坦层TOC覆盖电极层TMB。触控平坦层TOC用于实现平坦化,以便在其上堆叠其它膜层。触控平坦层TOC可采用透光的光学胶等材料,在此不做特殊限定。
当然,在本公开的其它实施方式中,触控层TEL可以不设置触控缓冲层TBU和触控平坦层TOC中的任意一个。
在本公开的一些实施方式中,如图6所示,为了提高电极层TMB 的膜层的均一性,电极层TMB还包括虚设电极TD,其可设于电极间隙TG内,且沿电极间隙TG的延伸方向延伸,并将电极间隙TG分隔为位于虚设电极TD两侧的第一间隙TG1和第二间隙TG2,第一间隙TG1和第二间隙TG2可视为电极间隙TG中位于虚设电极TD以外的区域。虚设电极TD可以在局部断开,而不一定沿电极间隙TG连续延伸。当然,在本公开的其它实施方式中,电极间隙TG内也可以不设置虚设电极TD。
在本公开的一些实施方式中,如图6所示,电极层TMB可为由交叉的网格线NHL形成的网格状结构,其具有多个网孔NH;一个网孔NH可与至少一个发光器件LD交叠,例如,可使网孔NH与像素开口PH一一对应地交叠,且网孔NH不小于与其交叠的像素开口PH。由此,使得发光器件LD发出的光线可从网孔NH透过。同时,转接层TMA也可以是由交叉的网格线NHL形成的网格状结构,其具有多个网孔NH。转接层TMA的网孔NH与电极层TMB的网孔NH一一对应地交叠,且大小和形状相同。也就是说,第一触控电极TX(第一电极块TBt和电极连接部TBc)和第二触控电极RX(第二电极块TBr和转接桥TBb)均为具有网孔NH的网状结构,且对于具有虚设电极TD的实施方式而言,虚设电极TD也可以采用上述的具有网孔NH的网状结构。
上述的任一网孔NH可由多个网格线NHL围成,其可以是矩形、菱形、五边形等多边形,多边形的每一个边即为一个网格线NHL。电极间隙TG可由在电极层TMB中的部分网格线NHL上形成截断网格线NHL的电极断口TC形成,且由于网孔NH是网格线NHL围成的,使得电极断口TC及其所处的网格线NHL围成的网孔NH连通,因而电极间隙TG是由沿一定轨迹分布的电极断口TC以及被电极断口TC连通的网孔NH形成的,该轨迹可以呈折线延伸,具体路径视电极块TB的形状而定,只要能分割出电极块TB即可。
进一步的,如图6所示,对于设有虚设电极TD的电极间隙TG,第一间隙TG1和第二间隙TG2可由在电极层TMB中的部分网格线NHL上形成截断网格线NHL的子断口TCs形成,子断口及其所处的网格线NHL围成的网孔NH连通,一个电极断口TC可被虚设电极TD分隔为 两个子断口TCs。第一间隙TG1和第二间隙TG2由沿一定轨迹分布的子断口TCs以及被子断口TCs连通的网孔NH形成。
需要说明的是,如图3和图4所示,同一电极行Th中相邻两个第一电极块TBt通过电极连接部TBc连接,且该两个第一电极块TBt和电极连接部TBc可为一体结构,因此,电极间隙TG并不截断电极连接部TBc,使得该两个第一电极块TBt并不被电极间隙TG分隔,但第一电极块TBt中除了与电极连接部TBc连接的区域外,均被电极间隙TG围绕,使得第一电极块TBt的轮廓主要还是由电极间隙TG分割而形成,因此,上文中提到的电极间隙TG分割出电极块TB,并不要求任意两个电极块TB都被电极间隙TG完全截断,只要分割出至少两个独立的电极块TB即可,虽然同一电极行Th的第一电极块TBt与电极连接部TBc为一体结构,但其与任意一个第二电极块TBr都是独立的,即分割开的。
在本公开的一些实施方式中,如图5和图6所示,若存在至少两种大小不同(在驱动背板BP上的正投影的面积不同)发光器件LD,则各网孔NH中至少存在两种大小不同的网孔NH,且在与大小不同的两个发光器件LD交叠的网孔NH中,与较大的发光器件LD交叠的网孔NH大于与较小的发光器件LD交叠的网孔NH;也就是说,发光器件LD越大,与其交叠的网孔NH越大。
在本公开的一些实施方式中,为了增大相邻的一第一电极块TBt和一第二电极块TBr之间正对的区域,以便增大电容,可使第一电极块TBt和第二电极块TBr的边沿设置沿周向间隔分布的叉指。在相邻的一第一电极块TBt和一第二电极块TBr中,第一电极块TBt的一部分叉指可位于第二电极块TBr的一部分叉指之间内,但互不接触,使得第一电极块TBt的该部分叉指与第二电极块TBr的该部分叉指交替间隔排列,通过叉指可使第一电极块TBt和第二电极块TBr间的间隙的延伸轨迹更加曲折,有利于增大二者之间的电容,提高感应触控操作的灵敏度。进一步的,对于存在上述虚设电极TD的实施方式,虚设电极TD可沿叉指限定出的沿折线轨迹延伸的电极间隙TG延伸。
在本公开的一些实施方式中,触控层TEL可直接设于封装层TFE远离驱动背板BP的表面,降反层RL可设于触控层TEL远离驱动背板 BP的一侧;此时,降反层RL若采用上文中的滤光部CF和降反吸光层BM1,则可利用降反吸光层BM1对电极层TMB进行遮挡,防止其反射环境光,而不用在触控层TEL中设置吸光的膜层。发明人发现,这样一来,一方面,有利于简化触控层TEL的结构,降低工艺难度和成本;另一方面,触控层TEL与发光器件LD较近,发光器件LD的第二电极CAT会增大触控层TEL的负载,第二电极CAT等膜层的信号使触控层TEL的信号的信噪比(SNR)降低,对触控功能造成干扰。
如图8-图11所示,在本公开的一些实施方式中,可将触控层TEL设于降反层RL远离显示基板PNL的一侧,例如,降反层RL直接堆叠于封装层TFE远离驱动背板BP的表面,触控层TEL则可直接堆叠于降反层RL远离驱动背板BP的表面。如此一来,可增大电极层TMB与第二电极CAT的距离,降低第二电极CAT对电极层TMB的干扰,提升信噪比,有利于提高触控精度,降低触控异常的风险;但是,降反吸光层BM1无法遮挡电极层TMB,因此,在一些实施方式中,可在触控层TEL中设置第一吸光层BM2,且第一吸光层BM2位于电极层TMB远离显示基板PNL的一侧,其可采用黑色的绝缘材料,例如,第一吸光层BM2可采用混合有碳黑的树脂,在此不对其材料做特殊限定。利用第一吸光层BM2可对第二电极CAT进行遮挡,吸收环境光,防止电极层TMB反射的环境光对显示效果造成影响。
进一步的,如图8和图10所示,为了避免遮挡发光器件LD发光,第一吸光层BM2还可设有与发光器件LD交叠的第一透光孔BH2,第一透光孔BH2可与像素开口PH一一对应地交叠,一像素开口PH在驱动背板BP上的正投影可位于与其交叠的第一透光孔BH2在驱动背板BP上的正投影以内,防止第一吸光层BM2遮挡发光器件LD。第一透光孔BH2可使第一吸光层BM2也呈网状结构,第一吸光层BM2覆盖网状结构的电极层TMB的网格线。
发明人发现,基于上述具有第一吸光层BM2的触控层TEL进行触控操作时,有时会存在触控异常,经过分析后发现,第一吸光层BM2的材料难以确保完全绝缘,具有弱导电性,例如,混合有碳黑的树脂虽然可以视为绝缘材料,但仍具有弱导电性。若第一吸光层BM2直接覆盖 在电极层TMB的表面,即二者直接接触,则这种弱导电性可能会使相邻的电极块TB短路,导致触控异常;为了防止第一吸光层BM2造成的短路,在一些实施方式中,可在电极层TMB上覆盖绝缘层,该绝缘层可以是氮化硅、氮氧化硅等无机绝缘材料,也可以是光学胶等有机绝缘材料;将第一吸光层BM2设于该绝缘层远离显示基板PNL的表面,从而防止第一吸光层BM2造成的短路。但这样一来,触控层TEL以及触控显示面板整体的厚度会增大,且需要额外的掩膜工艺来形成绝缘层,使成本增加。
为了在不设置绝缘层的情况下,降低短路风险,如图8-图11所示,发明人提出,可将第一吸光层BM2与电极层TMB直接接触,且第一吸光层BM2至少覆盖电极层TMB远离显示基板PNL的表面;并在第一吸光层BM2对应于电极间隙TG的区域开设吸光间隙BG,吸光间隙BG沿电极间隙TG的延伸方向延伸,且与电极间隙TG交叠,使第一吸光层BM2至少在吸光间隙BG处断开,切断造成电极块TB短路的路径,可在不额外增加绝缘膜层的基础上,防止短路,降低发生触控异常的风险;且由于吸光间隙BG与电极间隙TG对应,而电极间隙TG的宽度远小于电极块在任意方向的尺寸,因而即便吸光间隙BG处透光,其下方的膜层也不会大量反射环境光,不会对显示效果造成明显的干扰。
电极间隙TG的宽度为其两个侧边之间的距离,也即电极间隙TG分隔的两个电极块的距离。其中,对于网状结构的电极层TMB而言,电极间隙TG的宽度可为该两个电极块距离最近的区域之间的距离,例如电极断口TC的宽度。
如图5和图7所示,对于网状结构的电极层TMB及转接层TMA而言,电极间隙TG包括截断网格线NHL的电极断口TC,第一吸光层BM2在对应电极断口TC的区域形成吸光断口BC,吸光断口BC可沿电极间隙TG的分布方向分布;同时,电极层TMB的网孔NH由网格线NHL围成,相应的,结合图19-图22所示,第一吸光层BM2为由吸光线围成的网状结构,该网状结构的网孔即为第一透光孔BH2,且第一透光孔BH2由吸光线BML围成,吸光断口BC截断部分吸光线,使得吸光断口BC可连通部分第一透光孔BH2,从而形成吸光间隙BG。
由于第一吸光层BM2覆盖电极层TMB,触控平坦层TOC覆盖第一吸光层BM2,且填充第一透光孔BH2,用于实现平坦化。
吸光断口BC的两侧壁(即被吸光断口BC截断的吸光线的自由端的端面)可沿直线、折线、曲线或其它轨迹延伸,举例而言:
如图19所示,在第一种吸光断口中,吸光断口BC的两侧壁沿垂直于其宽度方向的直线延伸,具体来说,吸光线BML断开形成吸光断口BC,吸光断口BC的两侧壁ST平行。
如图20所示,在第二种吸光断口中,吸光断口BC的侧壁可包括垂直于宽度方向的顶面ST和平滑连接于顶面ST两侧的两个呈弧形的过渡面SC,该两个过渡面SC与该吸光断口BC所在的吸光线BML的两侧壁SS平滑连接,吸光断口BC的两个侧壁的顶面平行。
如图21所示,在第三种吸光断口中,吸光断口BC的侧壁也可包括垂直于宽度方向的顶面ST和连接于顶面ST两侧的两个过渡面SC,该两个过渡面SC与该吸光断口BC所在的吸光线BML的两侧壁SS连接,过渡面SC为与顶面ST呈一定夹角(不为0°)的平面;吸光断口BC的两个侧壁的顶面ST平行。
如图22所示,在第四种吸光断口中,吸光断口BC的侧壁也可包括垂直于宽度方向的第一顶面ST1和与第一顶面ST1呈一定夹角(不为0°)的连接于第一顶面ST1一侧的第二顶面ST2;吸光断口BC的两个侧壁的两个第一顶面ST1平行,两个第二顶面ST2平行。
进一步的,如图9-图11所示,由于工艺精度以及误差等因素的限制,电极间隙TG的侧壁不一定完全垂直于显示基板PNL,而是一个使电极间隙TG沿靠近显示基板PNL的方向收缩的坡面,相应的,该坡面使电极块TB的侧壁沿靠近显示基板PNL的方向扩张。为了进一步提高降低环境光反射的效果,可使吸光间隙BG在显示基板PNL上的正投影的边界位于电极间隙TG在显示基板PNL上的正投影的边界的内侧,即吸光间隙BG的宽度小于其对应的电极间隙TG的宽度,也即,吸光间隙BG在显示基板PNL上的正投影位于电极间隙TG在显示基板PNL上的正投影以内,且与电极间隙TG在显示基板PNL上的正投影的边界间隔分布,也就是说,第一吸光层BM2可延伸至电极间隙TG内,从而不仅覆盖电 极层TMB远离显示基板PNL的表面,还可覆盖电极层TMB的侧壁,从而将电极层TMB中除了与降反层RL接触的表面外的其它表面包覆起来,减少对环境光的反射。
此外,如此设计,也可提前为因工艺误差等原因造成的吸光间隙BG的宽度大于电极间隙TG的情况留出工艺余量,防止发生电极层TMB远离显示基板PNL的表面未被第一吸光层BM2覆盖的情况。
吸光间隙BG的数量可为一个或多个(不少于两个),且在采用多个吸光间隙BG,则各吸光间隙BG可沿电极间隙TG的宽度方向分布,各吸光间隙BG在显示基板PNL上的正投影位于电极间隙TG在显示基板PNL上的正投影以内,也就是说,在吸光间隙BG的范围内,第一吸光层BM2被多个吸光间隙BG截断,可进一步降低短路风险。基于上文对电极间隙TG的宽度的说明,宽度方向为垂直于电极间隙TG两侧边界的方向,进一步的,宽度方向可为电极断口TC两端连线及其延伸线的延伸方向。
如图3、图5-图7所示,在本公开的第一种实施方式中,电极间隙TG内设有上述的虚设电极TD,吸光间隙BG的数量为两个,且包括与第一间隙TG1交叠的第一吸光间隙BG1和与第二间隙TG2交叠的第二吸光间隙BG2,从而通过第一吸光间隙BG1和第二吸光间隙BG2截断第一吸光层BM2,降低短路风险。同时,可使第一吸光间隙BG1在显示基板PNL上的正投影位于第一间隙TG1在显示基板PNL上的正投影以内,第二吸光间隙BG2在显示基板PNL上的正投影位于第二间隙TG2在显示基板PNL上的正投影以内,最大程度的降低对环境光的反射。进一步的,可使第一吸光间隙BG1的宽度小于其交叠的第一间隙TG1,第二吸光间隙BG2的宽度小于其交叠的第二间隙TG2,利用第一吸光层BM2覆盖子断口的侧壁。
如图12-图14所示,在本公开的第二种实施方式中,电极间隙TG内不设置虚设电极TD,避免反光,吸光间隙BG的数量为两个,且包括与第一间隙TG1交叠的第一吸光间隙BG1和与第二间隙TG2交叠的第二吸光间隙BG2。同时,可使第一吸光间隙BG1在显示基板PNL上的正投影位于第一间隙TG1在显示基板PNL上的正投影以内,第二吸光 间隙BG2在显示基板PNL上的正投影位于第二间隙TG2在显示基板PNL上的正投影以内,最大程度的降低对环境光的反射。进一步的,可使第一吸光间隙BG1的宽度小于其交叠的第一间隙TG1,第二吸光间隙BG2的宽度小于其交叠的第二间隙TG2,利用第一吸光层BM2覆盖子断口的侧壁。
在本公开的第三种实施方式中,对于一个吸光间隙BG而言,可使其在显示基板PNL上的正投影的边界的至少两个区域与电极间隙TG在显示基板PNL上的正投影的边界的距离不同,使吸光间隙BG更加曲折,即便吸光间隙BG存在反光,也可通过使吸光间隙BG更加曲折,减弱其在视觉上的干扰。举例而言:
如图15和图16所示,为了防止吸光间隙BG露出虚设电极TD,对环境光造成反射,在电极间隙TG内不设置虚设电极TD,且电极层TMB为上文的网状结构。在构成吸光间隙BG的各吸光断口BC中,可以存在至少部分吸光断口BC在电极间隙TG的宽度方向上错开设置,即吸光断口BC可以不位于电极间隙TG的中间,而是向两侧偏移。以距离电极间隙TG两侧壁距离相等的点的集合为电极间隙TG的中心线,相互交叠的吸光间隙BG的吸光断口BC可以存在以下三种位置中的至少两种:
一种是吸光断口BC的中心线与电极间隙TG的中心线在显示基板PNL上的正投影重合;另两种是吸光断口BC的中心线与电极间隙TG的中心线间隔分布,即不重合。由此,使得可能存在反光的区域更加杂乱,减弱对显示效果的干扰。
如图17和图18所示,在本公开的第四种实施方式中,吸光间隙BG的数量可为一个,且吸光间隙的两个边界在显示基板PNL上的正投影与电极间隙TG的两个边界在显示基板PNL上的正投影的距离不同,即吸光间隙BG不位于电极间隙TG的中间,而是向一侧偏移;也就是说,第一吸光层BM2可延伸至电极间隙TG内,还可进一步延伸至越过电极间隙TG的中心线,通过一个吸光间隙BG防止短路,且可以增大第一吸光层BM2遮盖的范围,最大程度的降低对环境光的反射。举例而言:
以电极间隙TG内不设置虚设电极TD,且电极层TMB为上文的网 状结构的实施方式为例:吸光间隙BG的各吸光断口BC位于电极间隙TG的中心线的同一侧。吸光断口BC的宽度小于电极断口TC的宽度的一半。
如图23和图24所示,在本公开的一些实施方式中,第一吸光层BM2在对应于相邻两触控引线TL之间的区域断开设置,防止第一吸光层BM2的若导电性造成相邻触控引线TL短路。进一步的,可使第一吸光层BM2覆盖触控引线TL远离显示基板PNL的表面和触控引线TL的侧壁,即完全包覆触控引线TL被露出的表面,防止触控引线TL反光。
如图8和图10所示,在本公开的第一实施方式中,第一透光孔BH2的侧壁可为向靠近显示基板PNL的方向收敛的坡面,可使触控平坦层TOC的折射率大于第一吸光层BM2的折射率,以便使发光器件LD发出的部分光线,在触控平坦层TOC和第一透光孔BH2的侧壁的接触界面发生全反射,实现光线的汇聚,有利于提高触控显示面板正面的亮度。
进一步的,如图9和图10所示,在本公开的第一实施方式中,触控显示面板还可包括第二吸光层BM3和透明平坦层EOC,其可设于触控平坦层TOC远离显示基板PNL的表面,第二吸光层BM3的材料可以是黑色的树脂或其他可以吸收光线的材料,其可以与第一吸光层BM2采用相同的材料。同时,第二吸光层BM3可具有多个第二透光孔BH3,且一个第二透光孔BH3与一个第一透光孔BH2交叠,二者可以是一一对应的关系。第二透光孔BH3的侧壁可为向靠近显示基板PNL的方向收敛的坡面。
为了防第一吸光层BM2和第二吸光层BM3对发光器件LD造成遮挡,可使像素开口PH在驱动背板BP上的正投影位于一第一透光孔BH2在驱动背板BP上的正投影以内,且一第一透光孔BH2在驱动背板BP上的正投影位于一第二透光孔BH3在驱动背板BP上的正投影以内。
透明平坦层EOC覆盖第二吸光层BM3,且填充第二透光孔BH3。可使透明平坦层EOC的折射率大于第二吸光层BM3的折射率,以便使发光器件LD发出的部分光线,在透明平坦层EOC和第二透光孔BH3的侧壁的接触界面发生全反射,实现光线的汇聚,有利于提高触控显示面板正面的亮度。
需要说明的是,上述的折射率相同,是以同一波长的光线为准的,该波长可以是550nm,当然还可以是其他数值。
本公开实施方式还提供一种触控显示装置,其可包括上述任意实施方式的触控显示面板,触控显示面板的具体结构和有益效果可参考上文的触控显示面板的实施方式,在此不再详述。本公开的显示装置可以是平板电脑、笔记本电脑、车载显示器等中大型触控显示装置,也可以用于手机、只能手表等其它具有触控显示功能的电子设备,在此不再一一列举。
本领域技术人员在考虑说明书及实践这里公开的发明后,将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化,这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的,本公开的真正范围和精神由所附的权利要求指出。

Claims (20)

  1. 一种触控显示面板,其中,包括:
    显示基板,包括沿行方向和列方向分布的多个发光器件;
    触控层,设于所述显示基板的出光侧,且包括电极层和第一吸光层;所述电极层通过电极间隙分割出多个电极块;所述第一吸光层覆盖所述电极层的表面,且开设有与所述电极间隙交叠的吸光间隙和与所述发光器件交叠的第一透光孔,所述吸光间隙沿所述电极间隙的延伸方向延伸。
  2. 根据权利要求1所述的触控显示面板,其中,所述吸光间隙在所述显示基板上的正投影位于所述电极间隙在所述显示基板上的正投影以内,且与所述电极间隙在所述显示基板上的正投影的边界间隔分布。
  3. 根据权利要求1所述的触控显示面板,其中,所述吸光间隙的数量为多个,且沿所述电极间隙的宽度方向分布;各所述吸光间隙在所述显示基板上的正投影位于所述电极间隙在所述显示基板上的正投影以内。
  4. 根据权利要求2所述的触控显示面板,其中,所述吸光间隙在所述显示基板上的正投影的边界的至少两个区域与所述电极间隙在所述显示基板上的正投影的边界的距离不同。
  5. 根据权利要求1所述的触控显示面板,其中,所述吸光间隙在所述显示基板上的正投影的中心线与所述电极间隙在所述显示基板上的正投影的中心线间隔分布。
  6. 根据权利要求1所述的触控显示面板,其中,所述电极层还包括:
    虚设电极,设于所述电极间隙内,且沿所述电极间隙的延伸方向延伸;所述虚设电极将所述电极间隙分割为第一间隙和第二间隙;
    所述吸光间隙包括与所述第一间隙交叠的第一吸光间隙和与所述第二间隙交叠的第二吸光间隙。
  7. 根据权利要求1所述的触控显示面板,其中,所述电极层为由交叉的网格线形成的网状结构,所述第一透光孔与所述网状结构的网孔交叠;
    所述电极间隙由截断部分所述网格线的电极断口形成;所述第一吸光层在对应所述电极断口的区域形成吸光断口,所述吸光间隙由所述吸光断口形成。
  8. 根据权利要求7所述的触控显示面板,其中,各所述发光器件中至少包括两种大小不同的发光器件,且大小不同的发光器件的发光颜色不同;各所述网孔中至少包括两种大小不同的网孔,一所述网孔与一所述发光器件交叠;
    在与大小不同的两个所述发光器件交叠的网孔中,与较大的发光器件交叠的网孔大于与较小的发光器件交叠的网孔;所述吸光间隙至少截断大小不同的两种网孔。
  9. 根据权利要求1所述的触控显示面板,其中,所述触控显示面板具有显示区和位于所述显示区外的外围区,所述外围区具有与所述显示区沿所述列方向分布的扇出区;所述扇出区具有绑定部;至少部分所述电极块位于所述显示区;
    所述电极层还包括与所述电极块连接的触控引线,所述触控引线延伸至所述扇出区,并与所述绑定部连接;所述第一吸光层在对应于相邻两所述触控引线之间的区域断开设置。
  10. 根据权利要求9所述的触控显示面板,其中,所述第一吸光层覆盖所述触控引线远离所述显示基板的表面和所述触控引线的侧壁。
  11. 根据权利要求9所述的触控显示面板,其中,各所述电极块中包括多个第一电极块和多个第二电极块;所述触控层包括沿所述列方向间隔分布的多个第一触控电极和沿所述行方向间隔分布的多个第二触控电极;所述第一触控电极和所述第二触控电极在交叉处绝缘设置;所述第一触控电极包括多个所述第一电极块,所述第二触控电极包括多个所述第二电极块;所述电极间隙分隔所述第一电极块和所述第二电极块。
  12. 根据权利要求11所述的触控显示面板,其中,一所述第一触控电极包括沿所述列方向分布且连接的多个电极行,一所述电极行包括沿所述行方向分布的多个所述第一电极块以及连接相邻两所述第一电极块的电极连接部;
    一所述第二触控电极包括沿所述行方向分布且连接的多个电极列,一所述电极列包括沿所述列方向间隔分布的多个第二电极块以及连接相邻两所述第二电极块的转接桥;
    所述第一触控电极和所述第二触控电极通过所述电极连接部与所述 转接桥交叉,且所述电极连接部与所述转接桥位于相互绝缘的不同层。
  13. 根据权利要求12所述的触控显示面板,其中,所述触控层还包括:
    转接层,设于所述显示基板的出光侧;所述转接桥位于所述转接层;
    隔离层,覆盖所述转接层;所述电极层设于所述隔离层远离所述显示基板的表面;所述电极连接部位于所述电极层;
    至少一个所述触控引线包括位于所述转接层的第一线体和位于所述电极层的第二线体,所述第一线体和所述第二线体通过穿过所述隔离层的接触孔连接。
  14. 根据权利要求1-13任一项所述的触控显示面板,其中,所述触控层还包括:
    触控平坦层,覆盖所述第一吸光层,且填充所述第一透光孔;所述触控平坦层的折射率大于所述第一吸光层的折射率。
  15. 根据权利要求14所述的触控显示面板,其中,所述触控显示面板还包括:
    第二吸光层,设于所述触控平坦层远离所述显示基板的表面,且具有多个第二透光孔,一所述第二透光孔与一所述第一透光孔交叠;
    透明平坦层,覆盖所述第二吸光层,且填充所述第二透光孔;所述透明平坦层的折射率大于所述第二吸光层的折射率。
  16. 根据权利要求15所述的触控显示面板,其中,所述显示基板包括:
    驱动背板;
    像素定义层,与所述发光器件设于所述驱动背板同一侧,且具有限定各所述发光器件范围的像素开口;
    一所述像素开口在所述驱动背板上的正投影位于一所述第一透光孔在所述驱动背板上的正投影以内,所述第一透光孔在所述驱动背板上的正投影位于一所述第二透光孔在所述驱动背板上的正投影以内。
  17. 根据权利要求1-13任一项所述的触控显示面板,其中,所述触控显示面板还包括:
    降反层,设于所述显示基板的出光侧,所述触控层设于所述降反层 远离所述显示基板的一侧;所述降反层包括多个滤光部,一所述滤光部与一所述发光器件交叠,任一所述滤光部的颜色和与其交叠的所述发光器件的发光颜色相同。
  18. 根据权利要求17所述的触控显示面板,其中,所述显示基板包括:
    驱动背板;
    像素定义层,与所述发光器件设于所述驱动背板同一侧,且具有限定各所述发光器件范围的像素开口;
    所述降反层还包括:
    降反吸光层,设于所述显示基板的出光侧,且具有多个降反孔,任一所述滤光部至少部分限定于一所述降反孔内;一所述降反孔与一所述像素开口交叠;
    一所述像素开口在所述驱动背板上的正投影位于一所述降反孔在所述驱动背板上的正投影以内。
  19. 根据权利要求18所述的触控显示面板,其中,所述像素开口在所述驱动背板上的正投影的边界与所述降反孔在所述驱动背板上的正投影的边界的距离为0.5μm-1μm。
  20. 一种触控显示装置,其中,包括权利要求1-19任一项所述的触控显示面板。
PCT/CN2024/084346 2024-03-28 2024-03-28 触控显示面板及触控显示装置 Pending WO2025199852A1 (zh)

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