CN104407466B - A kind of display base plate, display panel and display device - Google Patents
A kind of display base plate, display panel and display device Download PDFInfo
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- CN104407466B CN104407466B CN201410822411.9A CN201410822411A CN104407466B CN 104407466 B CN104407466 B CN 104407466B CN 201410822411 A CN201410822411 A CN 201410822411A CN 104407466 B CN104407466 B CN 104407466B
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- 239000000758 substrate Substances 0.000 claims abstract description 150
- 125000006850 spacer group Chemical group 0.000 claims description 72
- 239000010408 film Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 8
- 239000010409 thin film Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000003999 initiator Substances 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 16
- 230000005611 electricity Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a kind of display base plate, display panel and display device, wherein, the display base plate includes：Substrate；At least one conductive layer on the substrate is set；The multiple patterned piezoelectric layers being arranged on the conductive layer；A plurality of first wire being arranged on the patterned piezoelectric layer；Multiple principal post shape dottle pin bodies corresponding with first wire, when touch-control occurs, the principal post shape dottle pin body changes into electric signal through the patterned piezoelectric layer to the pressure of the patterned piezoelectric layer and exported by first wire.Technical scheme provided by the invention can enable display panel and display device reduce power consumption while touch controllable function is realized, so as to realize the effect of power saving.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a display panel and a display device.
Background
With the development of modern electronic technology, the application of touch technology to display devices has resulted in touch display devices, and the application of touch display devices is becoming more and more widespread.
The touch display device can be realized by adopting an external touch technology and an embedded touch technology, wherein the external touch technology is realized by adding a touch panel outside a display panel, so that the weight of the display device is greatly increased, and the requirement of the market on the lightness and thinness of the display device is not met; the embedded touch technology is mainly classified into an On-Cell touch technology and an In-Cell touch technology, wherein the On-Cell touch technology is a technology In which a sensing electrode (Sensor) of a projected capacitive touch technology is fabricated On the back surface (i.e., attached to a surface of a polarizer) of a Color Filter (CF) of a Color Filter substrate and integrated into a structure of the Color Filter, and the In-Cell touch technology is a technology In which the sensing electrode (Sensor) is embedded into a structure of a display panel.
Currently, the sensing methods mainly used can be classified into resistive (contact), capacitive and optical types, wherein the capacitive touch panel is the mainstream of the touch panel. However, the capacitive touch panel detects a capacitance formed between a touch driving electrode and a touch sensing electrode in the touch panel (corresponding to a mutual capacitance mode) or a capacitance between the touch electrode and a ground terminal in the touch panel (corresponding to a self capacitance mode), and detects a touch position according to a capacitance variation generated before and after the touch on the touch panel, so that a touch object (e.g., a finger) must be a conductor to affect the capacitance, and if the touch object is an insulator, the touch panel cannot detect the touch position.
No matter the embedded touch technology or the external touch technology, when detecting the touch position on the touch display device, a touch driving signal is provided to the display device for scanning the touch driving electrode or the touch electrode, and even if no touch occurs, the touch driving electrode or the touch electrode still needs to be scanned continuously, so that the power consumption of the display device is relatively large.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a display substrate, a display panel and a display device to solve the technical problem of large power consumption of a touch display device using a capacitive touch panel in the prior art.
In a first aspect, an embodiment of the present invention provides a display substrate, including:
a substrate;
at least one conductive layer disposed on the substrate;
a plurality of patterned piezoelectric layers disposed on the conductive layer;
a plurality of first conductive lines disposed on the patterned piezoelectric layer;
and when touch control occurs, the pressure of the main columnar spacer body on the patterned piezoelectric layer is converted into an electric signal through the patterned piezoelectric layer and is led out by the first lead.
In a second aspect, embodiments of the present invention further provide a display panel, which includes an opposite substrate and the display substrate of the first aspect, wherein a main pillar-shaped spacer body in the display substrate is disposed between a patterned piezoelectric layer in the display substrate and the opposite substrate.
In a third aspect, an embodiment of the present invention further provides a display device, including the display panel according to the second aspect.
According to the display substrate, the display panel and the display device provided by the embodiment of the invention, the conductive layer is arranged in the display substrate, the patterned piezoelectric layer is arranged on the conductive layer, and the first lead is arranged on the patterned piezoelectric layer, so that when touch occurs, the pressure of the main columnar spacer body corresponding to the first lead on the patterned piezoelectric layer is converted into an electric signal through the patterned piezoelectric layer and is led out by the first lead, namely when touch occurs, the patterned piezoelectric layer can generate the electric signal without being driven by extra driving voltage, and therefore, the display panel and the display device using the display substrate can reduce the power consumption while realizing the touch function, and the effect of saving electricity is realized.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 5 is a schematic top view of FIG. 4;
FIG. 6 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 7 is a schematic top view of FIG. 6;
FIG. 8 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 9 is a top schematic view of FIG. 8;
FIG. 10 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 12a is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 12b is a schematic top view of FIG. 12 a;
FIG. 13 is a schematic view of a display substrate according to another embodiment of the present invention;
FIG. 14 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a display panel including a functional unit according to an embodiment of the present invention;
fig. 17 is a schematic structural diagram of another display panel including a functional unit according to an embodiment of the present invention;
fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
The embodiment of the invention provides a display substrate. Fig. 1 is a schematic structural diagram of a combination of a display substrate and a main columnar spacer body according to an embodiment of the present invention. As shown in fig. 1, the display substrate includes: a substrate 11; at least one conductive layer 12 disposed on the substrate 11; a plurality of patterned piezoelectric layers 13 disposed on the conductive layer 12; a plurality of first conductive lines 14 disposed on the patterned piezoelectric layer 13; and a plurality of Main columnar Spacer bodies 15(Main Post Spacer, abbreviated as Main PS) corresponding to the first conductive lines 14, wherein when a touch occurs, a pressure of the Main columnar Spacer bodies 15 on the patterned piezoelectric layer 13 is converted into an electrical signal through the patterned piezoelectric layer 13 and is derived from the first conductive lines 14.
In the embodiments of the present invention, the direction from the substrate 11 to the conductive layer 12 is taken as an upward direction, and the opposite direction is taken as a downward direction, where the upper or lower direction is only the description of the orientation, and may refer to direct contact or indirect contact, and the specific structure is not limited.
Specifically, each main columnar spacer body 15 corresponding to a first conductive line in the display substrate corresponds to one coordinate, and at least one first conductive line 14 may be disposed on each patterned piezoelectric layer 13, i.e., each patterned piezoelectric layer 13 may correspond to at least one main columnar spacer body 15. By arranging the conductive layer 12 and the patterned piezoelectric layer 13 on the conductive layer 12 in the display substrate, wherein the conductive layer 12 can be applied with a fixed reference voltage (the reference voltage can be selected as required), when a touch occurs, the main columnar spacer body 15 will press the patterned piezoelectric layer 13, so that the patterned piezoelectric layer 13 at the contact position (which may be a direct contact or an indirect contact) with the main columnar spacer body 15 is deformed, under the action of the voltage on the conductive layer 12, a voltage difference is formed between the surface of the patterned piezoelectric layer 13 in contact with the conductive layer 12 and the surface of the patterned piezoelectric layer 13 in contact with the main columnar spacer body 15, that is, the patterned piezoelectric layer 13 converts the pressure applied by the main columnar spacer body 15 into an electrical signal, the obtained electrical signal is led out through the first conducting wire 14, and then the coordinates of the main columnar spacer body 15 at the touch occurrence position can be obtained by processing the electrical signal, so that the coordinates of the touch position can be determined.
As described above, in the display substrate provided with the conductive layer 12 and the patterned piezoelectric layer 13, when touch occurs, it is not necessary to apply a driving voltage to the patterned piezoelectric layer 13 for driving, and the patterned piezoelectric layer 13 itself can generate an electrical signal.
In fig. 1, the display substrate further includes a black matrix 16 and a color resist layer 17, where the black matrix 16 is disposed on the substrate 11, and the color resist layer 17 is disposed on the black matrix, and the display substrate shown in fig. 1 is a color filter substrate because the black matrix and the color resist layer are basic display structures of the color filter substrate. After sequentially disposing the black matrix 16 and the color resist layer 17 on the substrate 11, the conductive layer 12 is disposed on the color resist layer 17, then the patterned piezoelectric layer 13 is disposed on the conductive layer 12, and the first conductive line 14 is disposed on the patterned piezoelectric layer 13.
In an embodiment of the present invention, the patterned piezoelectric layer 13 may include a polymer, a monomer, a photopolymerization initiator, a solvent, and a piezoelectric material. Preferably, the piezoelectric material is a piezoelectric polymer, such as polyvinylidene fluoride, and the like, and since the piezoelectric material is soft, good in formability, impact-resistant, and high in piezoelectric voltage constant, the prepared piezoelectric layer 13 can improve the touch sensitivity.
Fig. 2 is a schematic top view of fig. 1. As shown in fig. 1 and 2, a first end of the first wire 14 is disposed between the main cylindrical spacer body 15 and the patterned piezoelectric layer 13, that is, the first end of the first wire 14 is used for receiving an electrical signal generated by the patterned piezoelectric layer 13 when a touch occurs, and a second end of the first wire 14 is used for deriving the electrical signal. Since the position where the patterned piezoelectric layer 13 is deformed more largely is where the patterned piezoelectric layer 13 contacts the main columnar spacer body 15 (the patterned piezoelectric layer 13 and the main columnar spacer body 15 are in indirect contact in fig. 1), the intensity of the electric signal generated by the patterned piezoelectric layer 13 at the contact is high when a touch occurs. The first wire 14 is used to derive the electrical signal to process the electrical signal to determine the coordinates of the touch position, so that the higher the intensity of the electrical signal that can be derived by the first wire 14, the better the accuracy and precision of the determined touch position. Since the intensity of the electrical signal generated at the contact of the patterned piezoelectric layer 13 with the main columnar spacer body 15 is high when a touch occurs, the first end of the first wire 14 is disposed between the main columnar spacer body 15 and the patterned piezoelectric layer 13, so that the first wire 14 can derive the electrical signal with high intensity, and the accuracy and precision of the determined touch position can be improved.
As shown in fig. 1, the shape and size of the first end of the first wire 14 are the same as those of the orthographic projection of the main columnar spacer body 15 on the substrate 11. Thus, the electric signal generated at the contact of the patterned piezoelectric layer 13 and the main columnar spacer body 15 when a touch occurs can be almost entirely derived from the first conductive line 14, so that the accuracy and precision of the determined touch position can be improved.
Except that the shape and size of the first end of the first wire 14 shown in fig. 1 are the same as those of the orthographic projection of the main columnar spacer body 15 on the substrate 11, as shown in fig. 3, the shape of the first end of the first wire 14 is the same as those of the orthographic projection of the main columnar spacer body 15 on the substrate 11, but the size of the first end of the first wire 14 is smaller than those of the orthographic projection of the main columnar spacer body 15 on the substrate 11. Since the size of the first end of the first conductive line 14 in fig. 3 is smaller than that of the first end of the first conductive line 14 in fig. 3, the intensity of the electrical signal output by the first conductive line 14 in fig. 1 is higher than that of the electrical signal output by the first conductive line 14 in fig. 3.
Since the top view of fig. 3 is the same as the top view of fig. 1, please refer to fig. 2 and the related description for the top view of fig. 3, which is not repeated herein.
In addition to fig. 1 and 3, as shown in fig. 4, the shape of the first end of the first wire 14 is the same as the shape of the orthographic projection of the main columnar spacer body 15 on the substrate 11, but the size of the first end of the first wire 14 is larger than the size of the orthographic projection of the main columnar spacer body 15 on the substrate 11. Since the electrical signal is mainly generated where the patterned piezoelectric layer 13 is in contact with the main columnar spacer body 15 (the patterned piezoelectric layer 13 and the main columnar spacer body 15 are in indirect contact in fig. 4), although the size of the first end of the first wire 14 in fig. 4 is larger than that of the first end of the first wire 14 in fig. 1, the strength of the electrical signal output by the first wire 14 in fig. 4 and the first wire 14 in fig. 1 is almost equal.
Fig. 5 is a schematic top view of fig. 4. As shown in fig. 5, it can be more clearly seen that the shape of the first end of the first wire 14 is the same as the shape of the orthographic projection of the main columnar spacer body 15 on the substrate 11, and the size of the first end of the first wire 14 is larger than the size of the orthographic projection of the main columnar spacer body 15 on the substrate 11. In the above figures, the shape of the first end of the first wire 14 is the same as the shape of the orthographic projection of the main columnar spacer body 15 on the substrate 11, however, in other specific examples, the shape of the first end of the first wire may be different from the shape of the orthographic projection of the main columnar spacer body on the substrate, and the shape is not limited herein.
Fig. 1 to 5 described above give some specific examples in which the first end of the first wire is disposed between the main columnar spacer body and the patterned piezoelectric layer. In another specific example, as shown in fig. 6, the first wires 14 are disposed at the periphery of the main columnar spacer body 15, and the shortest distance a of the first wires 14 to the surface of the main columnar spacer body 15 in the direction parallel to the substrate direction X is within a preset distance. Fig. 7 is a top view of fig. 6. As can also be seen from fig. 7, the first wires 14 are disposed at the periphery of the main columnar spacer body 15, and the shortest distance a of the first wires 14 from the surface of the main columnar spacer body 15 in the direction parallel to the substrate direction X is within a preset distance.
Since an electrical signal is mainly generated at a contact position of the patterned piezoelectric layer 13 and the main columnar spacer body 15 when a touch occurs (the patterned piezoelectric layer 13 and the main columnar spacer body 15 are in direct contact in fig. 6 and 7), if the shortest distance a from the first conductive line 14 to the surface of the main columnar spacer body 15 in the direction parallel to the substrate X is smaller, the intensity of the electrical signal output by the first conductive line 14 is higher, which is more advantageous for improving the accuracy and precision of the determined touch position. However, the strength of the electrical signal generated by the patterned piezoelectric layer 13 when a touch occurs is related to the thickness of the patterned piezoelectric layer 13, and the thicker the patterned piezoelectric layer 13 is, the stronger the electrical signal generated when a touch occurs is, and the weaker the electrical signal is otherwise. Therefore, for the display substrates shown in fig. 6 and 7, in order to secure the strength of the electric signal output from the first conductive line 14, it is preferable that the preset distance is not more than half the thickness of the patterned piezoelectric layer 13. By selecting the predetermined distance to be not more than half the thickness of the patterned piezoelectric layer 13, the strength of the electrical signal derived from the first conductive line 14 when a touch occurs can be ensured, and the accuracy and precision of the determined touch position can be determined.
As described above, the thicker the patterned piezoelectric layer 13 is, the stronger the electrical signal generated by the patterned piezoelectric layer 13 when a touch occurs. However, the thickness of the patterned piezoelectric layer 13 is increased, which not only increases the thickness and weight of the display substrate, but also affects the display effect of the display substrate, and in view of this, in the embodiment of the present invention, the thickness of the patterned piezoelectric layer 13 may be preferably 1 μm to 3 μm. However, in practical design, the thickness of the patterned piezoelectric layer 13 can be selected according to the needs and design, and the thickness can be other values than the above range, which is not limited herein.
In the display substrates shown in fig. 1 to 7, one first conductive line is provided on each patterned piezoelectric layer, which is just some specific examples of providing the first conductive lines on the patterned piezoelectric layers, and in other specific examples, a plurality of first conductive lines may be provided on each patterned piezoelectric layer, and accordingly, the plurality of first conductive lines correspond to the plurality of main columnar spacer bodies. For example, as shown in fig. 8, two first wires 14 are disposed on each patterned piezoelectric layer 13, and the two first wires 14 correspond to two main columnar spacer bodies 15, and a first end of each first wire 14 is located between the corresponding main columnar spacer body 15 and the patterned piezoelectric layer 13, and a size and a shape of the first end of each first wire 14 are the same as a size and a shape of an orthographic projection of the corresponding main columnar spacer body 15 on the substrate 11. Fig. 9 is a top view of fig. 8. As can be clearly seen from fig. 9, two first wires 14 are disposed on each patterned piezoelectric layer 13, and the two first wires 14 correspond to two main columnar spacer bodies 15, and a first end of each first wire 14 is located between the corresponding main columnar spacer body 15 and the patterned piezoelectric layer 13, and a second end thereof is used for deriving an electrical signal when a touch occurs.
In the display substrates shown in fig. 1 to 9, one patterned piezoelectric layer is provided on each conductive layer, which are just some specific examples of providing the conductive layers and the patterned piezoelectric layers. In other specific examples, a plurality of patterned piezoelectric layers may be disposed on each conductive layer. For example, as shown in fig. 10, two patterned piezoelectric layers 13 are disposed on each conductive layer 12, one main columnar spacer body 15 and one first conductive line 14 corresponding thereto are disposed on each patterned piezoelectric layer 13, wherein a first end of the first conductive line 14 is located between the main columnar spacer body 15 and the patterned piezoelectric layer 13, and a size and a shape of the first end of the first conductive line 14 are the same as a size and a shape of an orthographic projection of the main columnar spacer body 15 on the substrate 11. Or as shown in fig. 11, different from fig. 10, two first wires 14 are disposed on each patterned piezoelectric layer 13, and the two first wires 14 correspond to two main columnar spacer bodies 15, and a first end of each first wire 14 is located between the corresponding main columnar spacer body 15 and the patterned piezoelectric layer 13, and a size and a shape of the first end of each first wire 14 are the same as a size and a shape of an orthographic projection of the corresponding main columnar spacer body 15 on the substrate 11.
In the above embodiments of the present invention, preferably, the patterned piezoelectric layer 13 is a patterned piezoelectric type planarization layer. Specifically, in the display substrate, since the planarizing layer (OC) is closest to the main columnar spacer body 15 as compared with the color resist layer and the black matrix, patterning the patterned piezoelectric layer 13 with the piezoelectric type planarizing layer can not only realize the function of the patterned piezoelectric layer 13 but also planarize the surface of the display substrate on the side away from the substrate 11.
As shown in fig. 2, 5, 7 and 9, the display substrate further comprises a second conductive line 18, the second conductive line 18 being electrically connected to the conductive layer (covered by the patterned piezoelectric layer 13 in fig. 2, 5, 7 and 9), the second conductive line 18 being used for transmitting a fixed reference voltage to the conductive layer. The fixed reference voltage is transmitted to the conductive layer through the second wire 18, so that when a touch occurs, the patterned piezoelectric layer 13 can convert the pressure applied to the main columnar spacer body 15 into an electrical signal under the action of the fixed reference voltage carried by the conductive layer.
It should be noted that the above figures are only some specific examples given for illustrating the display substrate, and the number, shape and size of the conductive layer, the patterned piezoelectric layer, the first conductive lines, the second conductive lines, and the like, the arrangement manner of the first conductive lines, the number of the patterned piezoelectric layers arranged on one to the conductive layer, the number of the first conductive lines arranged on one patterned piezoelectric layer, and the like in the display substrate are not limited herein.
In each of the above embodiments, the display panels each include a black matrix and a color resist layer, and thus, the corresponding display panel is a color film substrate. However, in the present invention, the display panel may also be an array substrate, and some embodiments when the display panel is an array substrate will be given below.
As shown in fig. 12a, the display substrate includes: a substrate 21; a thin film transistor film layer 22 disposed on the substrate 21; a pixel electrode layer 23 disposed on the thin film transistor film layer 22; and a first insulating layer 241 provided over the pixel electrode layer 23; a conductive layer 251 disposed on the first insulating layer 241; a patterned piezoelectric layer 26 disposed on the conductive layer 251; first conductive lines 27 are disposed on the patterned piezoelectric layer 26. Further, in fig. 12, the main columnar spacer body 28 is disposed in correspondence with the first conductive line 27, and the first end of the first conductive line 27 is disposed between the main columnar spacer body 28 and the patterned piezoelectric layer 26.
In the embodiments of the present invention, the direction from the substrate 21 to the thin film transistor layer 22 is taken as an upward direction, and the opposite direction is taken as a downward direction, wherein the upper or lower direction is only the description of the orientation, and may refer to direct contact or indirect contact, and the specific structure is not limited.
The display substrate shown in fig. 12a includes a thin film transistor film layer 22 and a pixel electrode layer 23, and the display substrate shown in fig. 12a is an array substrate because the thin film transistor film layer and the pixel electrode layer are basic display structures of the array substrate.
Fig. 12b is a schematic top view of fig. 12 a. As shown in fig. 12a and 12b, a first end of the first wire 27 is disposed between the main pillar-shaped spacer body 28 and the patterned piezoelectric layer 26, i.e., the first end of the first wire 27 is used for receiving an electrical signal generated by the patterned piezoelectric layer 26 when a touch occurs, and a second end of the first wire 27 is used for deriving the electrical signal, and the shape and size of the first end of the first wire 27 are the same as the shape and size of the orthographic projection of the main pillar-shaped spacer body 28 on the substrate 21; in addition, as shown in fig. 12b, the display substrate further includes a second conductive line 252, and the second conductive line 252 is electrically connected to the conductive layer (covered by the patterned piezoelectric layer 26 in fig. 12 b), and the second conductive line 252 is used for transmitting a fixed reference voltage to the conductive layer.
The display substrate may include a common electrode layer in addition to the display substrate shown in fig. 12 a. As shown in fig. 13, on the basis of the display substrate shown in fig. 12a, the display substrate further includes a common electrode layer 29 disposed between the pixel electrode layer 23 and the first insulating layer 241, and the common electrode layer 29 is electrically insulated from the pixel electrode layer 23 by a second insulating layer 242. Note that the display substrate shown in fig. 13 may be an array substrate required for an FFS (Fringe Field Switching) liquid crystal driving mode, and the display substrate is an array substrate of a Top-Com structure.
In addition to the display substrate shown in fig. 13 being only one specific example of a display substrate provided with a common electrode layer and a pixel electrode layer, in another specific example, as shown in fig. 14, on the basis of the display substrate shown in fig. 12a, the display substrate further includes a common electrode layer 29 provided between the pixel electrode layer 23 and the thin film transistor film layer 22, and the common electrode layer 29 is electrically insulated from the pixel electrode layer 23 by a second insulating layer 242. It should be noted that the display substrate shown in fig. 14 may be an array substrate required for an FFS (Fringe Field Switching) liquid crystal driving mode, and the display substrate is an array substrate with a Middle-Com structure.
The top views of fig. 13 and 14 are the same as the top view of fig. 12a, and please refer to fig. 12b and the related description thereof for details, which are not repeated herein.
It should be noted that the display substrates in fig. 12a, fig. 13 and fig. 14 are only some specific examples of the display substrate being an array substrate, and the number, shape and size of the conductive layers, the patterned piezoelectric layers, the first conductive lines, the second conductive lines and the like, the arrangement manner of the first conductive lines, the number of the patterned piezoelectric layers arranged on one to the conductive layers, the number of the first conductive lines arranged on one patterned piezoelectric layer and the like in the display substrate are not limited herein.
The embodiment of the invention also provides a display panel. Fig. 15 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 15, the display panel includes a counter substrate 31 and a display substrate 32, wherein the display substrate 32 is the display substrate described in the above embodiments. In fig. 15, the display substrate 32 includes a substrate structure 321 and a main columnar spacer body 322, wherein the substrate structure 321 is a structure other than the main columnar spacer body in the embodiments described above with respect to the array substrate, that is, the substrate structure 321 includes a patterned piezoelectric layer in contact (direct contact or indirect contact) with the main columnar spacer body 322, and the main columnar spacer body 322 is disposed between the patterned piezoelectric layer and the opposite substrate 31.
Specifically, if the display substrate 31 is an array substrate, the opposite substrate 32 may be a color film substrate; if the display substrate 31 is a color filter substrate, the opposite substrate 32 may be an array substrate.
The display panel will be further described below using the display substrate 32 shown in fig. 12b as an example. The corresponding description applies equally to the other embodiments of the display substrate described above.
In fig. 16, the display substrate 32 in the display panel includes a patterned piezoelectric layer 323; a main columnar spacer body 322 disposed on the patterned piezoelectric layer 323; a conductive layer (not shown because it is covered by the patterned piezoelectric layer) disposed under the patterned piezoelectric layer 323; a first insulating layer 324 disposed under the conductive layer; a first wire 325 corresponding to the main columnar spacer body 322, wherein a first end of the first wire 325 is disposed between the patterned piezoelectric layer 323 and the main columnar spacer body 322, and a second end of the first wire 325 is used for deriving an electrical signal generated by the patterned piezoelectric layer 323 when a touch occurs; the second conductive line 326 is electrically connected to the conductive layer for transmitting a fixed reference voltage to the conductive layer. Please refer to fig. 12a and 12b and the related description thereof for the structure of the display substrate 32 in fig. 16.
Further, as shown in fig. 16, the display panel may further include a signal processing unit 331, where the signal processing unit 331 is electrically connected to the second end of the first conductive line 325, and is configured to process an electrical signal derived from the first conductive line 325 and obtain coordinates of the touch position.
As shown in fig. 16, further, the display panel may further include a reference voltage generating unit 332, wherein the reference voltage generating unit 332 is electrically connected to the second wire 326 for generating a fixed reference voltage. Wherein, the fixed reference voltage can be selected according to actual needs. It should be noted that the second conductive line 326 is used for transmitting a fixed reference voltage to the conductive layer, and the fixed reference voltage may be provided by a reference voltage generating unit 332 disposed in the display panel. However, the display panel may not be provided with a reference voltage generating unit, and the fixed reference voltage received by the second wire may be provided by a component with a reference voltage in the display panel, and the second wire is electrically connected to the component through the second wire, and the second wire may transmit the received reference voltage to the conductive layer as the fixed reference voltage, as long as the fixed reference voltage can ensure that the patterned piezoelectric layer converts the pressure of the main columnar spacer body on the conductive layer into an electrical signal when a touch occurs, and how the second wire obtains the fixed reference voltage is not limited herein.
Further, on the basis of fig. 16, as shown in fig. 17, the display panel may further include a signal filtering unit 333 and a signal amplifying unit 334, where the signal filtering unit 333 is electrically connected to the second end of the first conducting wire 325, and is configured to filter the electrical signal derived from the first conducting wire 325 and output the filtered electrical signal to the signal amplifying unit 334; the signal amplifying unit 334 amplifies the received filtered electrical signal and outputs the amplified electrical signal to the signal processing unit 331.
When no touch is generated, noise from the display panel itself, such as static electricity, may generate fluctuations in the electrical signal of the patterned piezoelectric layer in the display substrate, and the fluctuations in the electrical signal may affect the accuracy of the electrical signal generated when touch is generated, so in order to improve the accuracy of the electrical signal generated when touch is generated, the electrical signal output by the first conductive line 325 needs to be filtered by the signal filtering unit 333. The specific filtering method comprises the following steps: the fluctuation of the electric signal can be determined by detection when no touch occurs, the fluctuation of the electric signal is used as a background signal, and when touch occurs, a signal which is opposite to the background signal is superposed on the electric signal output by the first lead in a background signal deduction mode, so that the electric signal generated by the patterned piezoelectric layer can be obtained after the background signal is deducted.
When touch occurs, the strength of the electrical signal generated by the patterned piezoelectric layer is weak, which is not favorable for the signal processing unit 331 to determine the coordinates of the touch position, therefore, in order to enhance the electrical signal generated by the patterned piezoelectric layer, the signal amplifying unit 334 may be electrically connected between the signal filtering unit 333 and the signal processing unit 331, and the electrical signal output by the signal filtering unit 333 is amplified by the signal amplifying unit 334, which may improve the strength of the electrical signal, thereby being favorable for the signal processing unit 331 to determine the coordinates of the touch position, and further improving the accuracy and precision of the determined touch position.
The embodiment of the invention also provides a display device. Fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 18, the display device 40 includes a display panel 41, and may further include other components for supporting the normal operation of the display panel 41, where the display panel 41 is the display panel described in the foregoing embodiments. The display device 40 may be a mobile phone, a desktop computer, a notebook, a tablet computer, an electronic album, an electronic paper, and the like.
According to the display substrate, the display panel and the display device provided by the embodiment of the invention, the conductive layer is arranged in the display substrate, the patterned piezoelectric layer is arranged on the conductive layer, and the first lead is arranged on the patterned piezoelectric layer, so that when touch occurs, the pressure of the main columnar spacer body corresponding to the first lead on the patterned piezoelectric layer is converted into an electric signal through the patterned piezoelectric layer and is led out by the first lead, namely when touch occurs, the patterned piezoelectric layer can generate the electric signal without being driven by extra driving voltage, and therefore, the display panel and the display device using the display substrate can reduce the power consumption while realizing the touch function, and the effect of saving electricity is realized.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (12)
1. A display substrate, comprising:
a substrate;
at least one conductive layer disposed on the substrate;
a plurality of patterned piezoelectric type planarization layers disposed on the conductive layer;
a plurality of first conductive lines disposed on a surface of the patterned piezoelectric type planarization layer, the piezoelectric type planarization layer for planarizing the surface of the display substrate;
the display substrate is a color film substrate or an array substrate; the color film substrate comprises a black matrix and a color resistance layer; the array substrate comprises a thin film transistor film layer and a pixel electrode layer;
when touch control occurs, the pressure of the main columnar spacer bodies on the patterned piezoelectric type planarization layer is converted into an electric signal through the patterned piezoelectric type planarization layer and is led out by the first lead;
the first end of the first wire is arranged between the main columnar spacer body and the patterned piezoelectric type planarization layer, the second end of the first wire leads out the electric signal, and the shape and the size of the first end of the first wire are the same as those of the orthographic projection of the main columnar spacer body on the substrate; or,
the shortest distance from the first lead to the surface of the main columnar spacer in the direction parallel to the substrate is within a preset distance, and the preset distance is not more than half of the thickness of the patterned piezoelectric type planarization layer.
2. The display substrate of claim 1, wherein the patterned piezoelectric planarization layer has a thickness of 1 μm to 3 μm.
3. The display substrate according to any one of claims 1 to 2, wherein at least one of the first conductive lines is disposed on each of the patterned piezoelectric-type planarization layers.
4. The display substrate according to any one of claims 1-2, wherein at least one of the patterned piezoelectric-type planarization layers is disposed on each of the conductive layers.
5. The display substrate of claim 1, further comprising a second conductive line electrically connected to the conductive layer for transmitting a fixed reference voltage to the conductive layer.
6. The display substrate of claim 1, wherein the patterned piezoelectric planarization layer comprises a polymer, a monomer, a photopolymerization initiator, a solvent, and a piezoelectric material.
7. The display substrate of claim 6, wherein the piezoelectric material is a piezoelectric polymer.
8. A display panel comprising an opposing substrate and the display substrate of any of claims 1-7, wherein a main columnar spacer body in the display substrate is disposed between a patterned piezoelectric-type planarization layer in the display substrate and the opposing substrate.
9. The display panel according to claim 8, further comprising a signal processing unit, wherein the signal processing unit is electrically connected to the second end of the first conductive line, and is configured to process an electrical signal derived from the first conductive line and obtain coordinates of a touch position.
10. The display panel according to claim 9, characterized in that the display panel further comprises: and the reference voltage generating unit is electrically connected with the second conducting wire and is used for generating fixed reference voltage.
11. The display panel according to claim 9 or 10, further comprising a signal filtering unit and a signal amplifying unit, wherein,
the signal filtering unit is electrically connected with the second end of the first lead and is used for filtering the electric signal led out by the first lead and outputting the filtered electric signal to the signal amplifying unit;
the signal amplifying unit is used for amplifying the received filtered electric signal and outputting the amplified electric signal to the signal processing unit.
12. A display device characterized by comprising a display panel according to claims 8-11.
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| CN104834121B (en) * | 2015-05-11 | 2018-01-30 | 京东方科技集团股份有限公司 | Touch base plate, display panel, display device and touch control method |
| CN105652488B (en) * | 2016-01-14 | 2017-10-10 | 京东方科技集团股份有限公司 | One kind can write liquid crystal display device and preparation method thereof, driving method |
| CN105807988A (en) * | 2016-02-25 | 2016-07-27 | 京东方科技集团股份有限公司 | Touch display substrate, touch display screen and fabrication method for touch display substrate |
| CN105807991A (en) * | 2016-03-03 | 2016-07-27 | 京东方科技集团股份有限公司 | Display substrate, embedded touch screen, driving method for embedded touch screen and display apparatus |
| CN105867688B (en) * | 2016-03-29 | 2019-06-14 | 京东方科技集团股份有限公司 | Touch base plate and its driving method, display device |
| CN105929577B (en) * | 2016-04-22 | 2020-01-07 | 厦门天马微电子有限公司 | Display panel, display device and manufacturing method of display panel |
| CN106155421B (en) * | 2016-09-09 | 2019-11-26 | 京东方科技集团股份有限公司 | A kind of touch panel, touch control display apparatus and touch control method |
| CN106773347B (en) * | 2016-12-26 | 2019-08-02 | 武汉华星光电技术有限公司 | Touch panel and display device built in a kind of |
| CN112581894B (en) * | 2019-09-30 | 2022-08-26 | 京东方科技集团股份有限公司 | Display device and power supply method thereof |
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