CN110865490A - Array substrate, display panel and display device - Google Patents
Array substrate, display panel and display device Download PDFInfo
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- CN110865490A CN110865490A CN201911205733.8A CN201911205733A CN110865490A CN 110865490 A CN110865490 A CN 110865490A CN 201911205733 A CN201911205733 A CN 201911205733A CN 110865490 A CN110865490 A CN 110865490A
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
Abstract
The invention discloses an array substrate, a display panel and a display device.A fingerprint identification structure is arranged in the array substrate and is not arranged on one side of a backlight module far away from the display panel like the prior art, so that the embodiment of the invention does not need to carry out special design (such as hole opening) on the backlight module, and further, the fingerprint identification device can not cause adverse effect on the uniformity of a backlight source provided by the backlight module, thereby ensuring that the display device can normally display; moreover, the embedded design of the fingerprint identification structure is realized, so that the thickness of the display device can be reduced, and the light and thin design is realized while the fingerprint identification function is realized. In addition, in the fingerprint identification process, the fingerprint identification device is close to the fingerprint, and the signal received by the fingerprint identification device is stronger, so that the fingerprint identification device can be quickly and accurately identified, and the efficiency and accuracy of fingerprint identification are improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to an array substrate, a display panel and a display device.
Background
The liquid crystal display is a non-self-luminous device, needs to be provided with a backlight module, and realizes a display function by utilizing a backlight source provided by the backlight module. For the lcd, if the fingerprint identification function is to be implemented, a fingerprint identification device is required to be disposed, and in the prior art, the fingerprint identification device is generally disposed on one side of the non-light-emitting surface of the backlight module, that is, the fingerprint identification device is disposed on one side of the backlight module away from the display panel.
However, if realize the fingerprint identification function, need set up the trompil in backlight unit to in the light of fingerprint reflection can incide to the fingerprint identification device, accomplish fingerprint identification. Therefore, the uniformity of the backlight source provided by the backlight module can be influenced, and the display effect of the liquid crystal display is influenced.
Therefore, how to avoid adverse effects on the display effect while realizing the fingerprint identification function is a technical problem to be urgently solved by the technical personnel in the field.
Disclosure of Invention
The embodiment of the invention provides an array substrate, a display panel and a display device, which are used for realizing a fingerprint identification function and avoiding adverse effects on a display effect.
In a first aspect, an embodiment of the present invention provides an array substrate, including:
a substrate base plate;
and locate in proper order first circuit structure, fingerprint identification structure and pixel electrode above the substrate base plate, the fingerprint identification structure includes: the pixel electrode comprises a first electrode, a piezoelectric layer and a second electrode which are arranged in a stacked mode, wherein the second electrode is arranged between the piezoelectric layer and the pixel electrode, and the second electrode is multiplexed as a common electrode;
wherein the first circuit structure is electrically connected to the first electrode for: and providing a fingerprint driving signal to the first electrode, and carrying out fingerprint identification according to a fingerprint identification signal detected by the first electrode.
In a second aspect, an embodiment of the present invention provides a display panel, including: the liquid crystal display panel comprises an array substrate, an opposite substrate and liquid crystal, wherein the array substrate and the opposite substrate are oppositely arranged, and the liquid crystal is positioned between the array substrate and the opposite substrate;
the array substrate is as described above according to the embodiment of the present invention.
In a third aspect, an embodiment of the present invention provides a display device, including: the display panel is positioned on a light-emitting surface of the backlight module;
the display panel is as described above in the embodiments of the present invention.
The invention has the following beneficial effects:
the array substrate, the display panel and the display device provided by the embodiment of the invention have the following advantages:
first, because the fingerprint identification structure is disposed in the array substrate and not disposed on a side of the backlight module away from the display panel as in the prior art, the backlight module does not need to be specially designed (for example, perforated) in the embodiment of the present invention, and the fingerprint identification device does not adversely affect the uniformity of the backlight source provided by the backlight module, thereby ensuring that the display device can normally display.
Second, owing to set up the fingerprint identification structure in array substrate, realized the embedded design of fingerprint identification structure, so, can reduce display device's thickness for when realizing the fingerprint identification function, realize frivolous design.
Third, owing to set up the fingerprint identification structure in the array substrate, so at the fingerprint identification in-process, the fingerprint identification device is nearer apart from the fingerprint, and the signal that the fingerprint identification device received is stronger for the fingerprint identification device can be discerned fast accurately, improves fingerprint identification's efficiency and rate of accuracy.
Drawings
FIG. 1 is a schematic diagram of a fingerprint identification structure in the prior art;
fig. 2 is a schematic structural diagram of a first array substrate according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second array substrate according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a third array substrate provided in an embodiment of the invention;
fig. 5 is a schematic structural diagram of a fourth array substrate provided in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a fifth array substrate according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a distribution of a plurality of fingerprint identification structures provided in an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display device provided in the embodiment of the present invention.
The display panel comprises a substrate 10, a substrate 20, a first circuit structure, a fingerprint identification structure 30, a first electrode 31, a second electrode 32, a piezoelectric layer 33, an insulating layer 34, a pixel electrode 40, a second circuit structure 50, a bridge electrode 60, a first conductive structure 70, a second conductive structure 80, a shading structure 90, a display panel 100, an array substrate 101, an opposite substrate 102, a liquid crystal 103, a backlight module 200, a lower polarizer 300, an upper polarizer 400, a cover plate 500, a z-fingerprint, a k-opening and a w-display device.
Detailed Description
Embodiments of an array substrate, a display panel and a display device according to embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventor of the present invention has found in the research that, for the lcd having the fingerprint recognition structure, the specific structure can be as shown in fig. 1, which shows the backlight module 200, the lower polarizer 300, the display panel 100, the upper polarizer 400, the cover plate 500, and the fingerprint recognition structure 30; wherein, fingerprint identification structure 30 sets up the one side that deviates from display panel 100 at backlight unit 200, because fingerprint identification structure 30 when discerning fingerprint z, need receive the light that reflects from fingerprint z, so need set up trompil k among the backlight unit 200, and need the collimation design, even make the surface that the reverberation can incide to fingerprint identification structure 30 collimatably to make fingerprint identification structure 30 can accurately discern fingerprint z.
However, with this arrangement, there are several problems:
1. since the fingerprint identification structure 30 is designed independently of the backlight module 200 and the display panel, the thickness of the display device is increased, which is not favorable for the light and thin design;
2. since the opening k is required to be disposed in the backlight module 200, the existence of the opening k may adversely affect the uniformity of the backlight source provided by the backlight module 200, resulting in a decrease in the display effect of the display device.
3. Because of fingerprint identification structure 30 is located backlight unit 200 and deviates from one side of display panel 100, and what contact with fingerprint z is display panel 100, so fingerprint identification structure 30 is far away from fingerprint z, and the signal that leads to fingerprint identification structure 30 to receive is more weak, and unable accurate discernment effectively reduces fingerprint identification's rate of accuracy.
Accordingly, the embodiment of the invention provides an array substrate, which is used for avoiding adverse effects on the uniformity of a backlight source provided by a backlight module, improving the accuracy of fingerprint identification and realizing the light and thin design of a display device.
Specifically, as shown in fig. 2 to 6, fig. 2 to 6 are schematic structural views of array substrates with five different structures respectively.
Referring to fig. 2 to 6, the array substrate may include:
a base substrate 10;
and a first circuit structure 20, a fingerprint identification structure 30 and a pixel electrode 40 sequentially located on the substrate 10, the fingerprint identification structure 30 including: a first electrode 31, a piezoelectric layer 33, and a second electrode 32, which are stacked, the second electrode 32 being disposed between the piezoelectric layer 33 and the pixel electrode 40, the second electrode 32 being multiplexed as a common electrode;
wherein the first circuit structure 20 is electrically connected to the first electrode 31 for: the fingerprint driving signal is supplied to the first electrode 31, and fingerprint recognition is performed based on the fingerprint recognition signal detected by the first electrode 31.
In the embodiment of the present invention, the pixel electrode 40 and the common electrode cooperate to generate an electric field for deflecting the liquid crystal molecules to implement display, wherein the material of the pixel electrode 40 and/or the material of the common electrode may be indium tin oxide.
The material of the first electrode 31 may be indium tin oxide.
In the embodiment of the present invention, since the fingerprint identification structure 30 is disposed in the array substrate and is not disposed on the side of the backlight module away from the display panel as in the prior art, the backlight module does not need to be specially designed (for example, perforated) in the embodiment of the present invention, and the fingerprint identification device does not adversely affect the uniformity of the backlight source provided by the backlight module, thereby ensuring that the display device can normally display.
Moreover, the fingerprint identification structure 30 is arranged in the array substrate, so that the embedded design of the fingerprint identification structure 30 is realized, the thickness of the display device can be reduced, and the light and thin design is realized while the fingerprint identification function is realized.
In addition, owing to set up fingerprint identification structure 30 in the array substrate, so at the fingerprint identification in-process, fingerprint identification structure 30 is nearer apart from the fingerprint, and the signal that fingerprint identification structure 30 received is stronger for fingerprint identification structure 30 can accurately discern fast, improves fingerprint identification's efficiency and rate of accuracy.
In specific implementation, in the embodiment of the present invention, a plurality of fingerprint identification structures may be provided;
the second electrode and the piezoelectric layer are arranged on the whole surface, and the first electrode is provided with a plurality of electrodes which are mutually insulated.
For example, fig. 7 shows a distribution diagram of a plurality of fingerprint identification structures, wherein 6 fingerprint identification structures 30 are shown, and the second electrodes 32 and the piezoelectric layers 33 are all disposed in a single layer, that is, the second electrodes 32 in different fingerprint identification structures 30 form a single structure, and the input signals are the same, the piezoelectric layers 33 in different fingerprint identification structures 30 also form a single structure, and the first electrodes 31 in different fingerprint identification structures 30 are insulated and independent from each other.
So, because second electrode 32 can multiplex to public electrode, so second electrode 32 whole face set up can, and piezoelectric layer 33 also can whole face set up, so, can simplify fingerprint identification structure 30's structure, reduce fingerprint identification structure 30's the preparation degree of difficulty, and then reduce array substrate's the preparation degree of difficulty to improve array substrate's preparation efficiency.
And, the dotted arrows in fig. 7 indicate the propagation direction of the ultrasonic waves, and the ultrasonic waves reflected at different positions in the fingerprint z can be detected by different first electrodes 31 after being converted into fingerprint identification signals, so that the fingerprint identification signals can be analyzed and identified through the first circuit structures 20 (the first circuit structures 20 are not shown in fig. 7) located in the film layer m 1.
In addition, the film m2 in fig. 7 includes a plurality of structures, such as structures other than the fingerprint identification structure 30 and the first circuit structure 20 in the array substrate, liquid crystal, an opposite substrate, and the like, and here, only one film m2 is used to represent a propagation medium of the ultrasonic wave, and the structure specifically included in the film m2 is not particularly limited.
It should be noted that the specific structure of the first circuit structure 20 electrically connected to the first electrode 31 in different fingerprint identification structures 30 may be the same or different, and all that is required by the embodiments of the present invention is that the fingerprint identification can be achieved.
Moreover, the specific structure of the first circuit structure 20 (only one transistor is used to replace the first circuit structure 20 in fig. 2 to 6, but this does not mean that the first circuit structure 20 includes only one transistor) is not specifically limited in the embodiment of the present invention, and the specific structure also belongs to the protection scope of the embodiment of the present invention as long as fingerprint identification can be achieved.
That is, the first electrodes 31 in the different fingerprint identification structures 30 can respectively detect the fingerprint identification signal corresponding to the ultrasonic wave reflected by the fingerprint peak and the fingerprint identification signal corresponding to the ultrasonic wave reflected by the fingerprint valley, and the fingerprint identification can be realized by analyzing the received different fingerprint identification signals.
Because the first electrode 31 is electrically connected with the first circuit structure 20, and the fingerprint identification signal can be transmitted to the first circuit structure 20 through the first electrode 31, the first electrodes 31 in different fingerprint identification structures 30 need to be arranged in an insulating manner, so that mutual interference between different fingerprint identification structures 30 is avoided, and further the accuracy of fingerprint identification is prevented from being influenced.
Specifically, the working principle of the fingerprint identification structure in the embodiment of the present invention is as follows:
the fingerprint identification structure mentioned in the embodiment of the invention can be regarded as a capacitor, and the first electrode and the second electrode can be regarded as two electrode plates of the capacitor.
Moreover, the fingerprint identification structure can be understood as an ultrasonic fingerprint identification device, wherein ultrasonic waves are sound waves with the frequency higher than 20000Hz, the directivity is good, the penetrating power is strong, more concentrated sound energy is easy to obtain, the propagation distance in water is long, and the ultrasonic fingerprint identification structure can be propagated in other media and can be used for distance measurement, speed measurement, cleaning, welding, stone breaking, sterilization, disinfection and the like.
If the ultrasonic wave is transmitted to a certain direction, the distance between the transmitting point and the reflecting point can be calculated by detecting the time and the intensity of the sound wave from the transmission to the reflection, so that the fingerprint information can be acquired according to the principle, and the fingerprint identification is realized.
In conjunction with the structures shown in fig. 2 and 7, in a specific fingerprint identification process, in order to enable the piezoelectric layer 33 to generate ultrasonic waves, and the second electrode 32 is multiplexed as a common electrode, the common signal input to the second electrode 32 is a fixed signal, accordingly, the fingerprint driving signal input to the first electrode 31 through the first circuit structure 20 may be a high-frequency signal (such as, but not limited to, a high-frequency sinusoidal signal), and under the action of a high-frequency electric field formed by the first electrode 31 and the second electrode 32, the piezoelectric layer 33 located between the first electrode 31 and the second electrode 32 may generate and emit ultrasonic waves.
Moreover, the fingerprint driving signals input to the first electrodes 31 in different fingerprint identification structures 30 may be the same, so that each fingerprint identification structure 30 generates the same ultrasonic wave, so as to facilitate subsequent fingerprint identification, and reduce the difficulty of fingerprint identification.
After the generation of the ultrasound waves, the first circuit arrangement 20 may stop inputting the fingerprint driving signal to the first electrode 31, i.e. at this time the first circuit arrangement 20 stops inputting any signal to the first electrode 31.
When the ultrasonic wave meets the fingerprint z, because the fingerprint z has peaks and valleys, and the peaks and valleys have different reflection intensities to the ultrasonic wave, that is, the gap between the position of the peak and the display panel is small, the existing air is small, so the reflection intensity is large, the gap between the position of the valley and the display panel is large, the existing air is large, so the reflection intensity is small, therefore, when the reflected ultrasonic wave reaches the piezoelectric layer 33, the reflected ultrasonic wave signal can be converted into a fingerprint identification signal through the piezoelectric layer 33, and then the fingerprint identification signal is detected by the different first electrodes 31 and transmitted to the first circuit structure 20, so that the first circuit structure 20 detects the fingerprint identification signal, and the fingerprint identification is realized.
Optionally, in the embodiment of the present invention, as shown in fig. 3, the fingerprint identification structure 30 further includes an insulating layer 34;
the insulating layer 34 is disposed between the first electrode 31 and the piezoelectric layer 33.
The reason for this is that:
in the operation process of the display panel, a phenomenon of electric leakage may occur due to some reasons, that is, the first electrode 31 can still detect an electric signal when fingerprint identification is not performed, and the electric signal is not obtained by converting the reflected ultrasonic wave by the piezoelectric layer 33, that is, the electric signal is an interference signal, and if the interference signal is transmitted to the first circuit structure 20 by the first electrode 31, an erroneous judgment may be generated, so that the accuracy of fingerprint identification is reduced.
After the insulating layer 34 is added, the insulating layer 34 can prevent the interference signal from being transmitted to the first electrode 31, and further prevent the interference signal from being transmitted to the first circuit structure 20 through the first electrode 31, so as to prevent the occurrence of misjudgment and improve the accuracy of fingerprint identification.
Optionally, in an embodiment of the present invention, the array substrate further includes: a second circuit structure electrically connected to the pixel electrode;
the second circuit structure is used for providing display signals for the pixel electrode;
the first circuit structure and the second circuit structure are arranged on the same layer.
For example, as shown in fig. 4, the second circuit structure 50 is shown by only one transistor, but this does not mean that the second circuit structure 50 includes only one transistor, and the specific structure of the second circuit structure 50 may be any structure known to those skilled in the art, and is not limited herein.
Referring to fig. 4, the pixel electrode 40 is electrically connected to the drain D1 of the transistor in the second circuit structure 50, so as to input a display signal to the pixel electrode 40, so that an electric field is formed between the pixel electrode 40 and the common electrode (i.e. the second electrode 32), thereby driving the liquid crystal (not shown) to deflect, thereby implementing a display function.
Because the first circuit structure 20 and the second circuit structure 50 are arranged on the same layer, the first circuit structure 20 can be manufactured at the same time when the second circuit structure 50 is manufactured, so that the manufacturing process of the array substrate is simplified, the manufacturing difficulty of the array substrate is reduced, and the manufacturing efficiency of the array substrate is improved. Meanwhile, the thickness of the array substrate is reduced, so that the thickness of the display panel is reduced, and the light and thin design is realized.
In a specific implementation, in an embodiment of the present invention, the array substrate further includes: a first conductive structure for providing a common signal;
the first conductive structure is positioned between the substrate base plate and the piezoelectric layer;
the first conductive structure is electrically connected to the second electrode.
So, can input public signal to the second electrode to make the second electrode can realize the function of public electrode and realize the function of fingerprint identification device, thereby guarantee that display panel can normally show, guarantee that fingerprint identification device realizes fingerprint identification.
Specifically, in order to electrically connect the first conductive structure and the second electrode, the following configurations may be adopted:
mode 1:
optionally, in an embodiment of the present invention, the first conductive structure and the second electrode are directly electrically connected through the via.
For example, as shown in fig. 6, the first conductive structure 70 is disposed on the same layer as the first electrode 31, and a via hole (e.g., a dashed circle 4) may be disposed in the piezoelectric layer 33 to electrically connect the first conductive structure 70 and the second electrode 32.
For another example, the first conductive structure may be disposed on the same layer as the source of the transistor in the first circuit structure, and in this case, a via hole, not shown, needs to be disposed in the piezoelectric layer and the insulating film between the first electrode and the source of the transistor to electrically connect the first conductive structure and the second electrode.
For another example, the first conductive structure may also be located on other film layers, and accordingly, a via hole, not shown, may be formed in each film layer located between the first conductive structure and the second electrode, so as to electrically connect the first conductive structure and the second electrode.
Therefore, in practical situations, the position of the first conductive structure can be set according to actual needs, and the via hole is correspondingly manufactured, so that the first conductive structure is electrically connected with the second electrode, the requirements of various application scenarios are met, and the design flexibility is improved.
Mode 2:
optionally, in an embodiment of the present invention, the array substrate further includes: and the first conductive structure is electrically connected with the second electrode through the bridging electrode.
For example, as shown in fig. 4, the bridging electrode 60 and the pixel electrode 40 are disposed at the same layer, and the first conductive structure 70 and the first electrode 31 are disposed at the same layer, at this time, the bridging electrode 60 can electrically connect the first conductive structure 70 and the second electrode 32, respectively, so as to electrically connect the first conductive structure 70 and the second electrode 32.
When the pixel electrode 40 is manufactured, since the pixel electrode 40 needs to be electrically connected to the drain D1 of the transistor, the via 1 (as shown by the dotted line 1 in fig. 4) may need to be manufactured at the same time when the pixel electrode 40 is manufactured; if the bridging electrode 60 is simultaneously formed when the pixel electrode 40 is formed, the via hole 2 (e.g., the dotted line 2 in fig. 4) and the via hole 3 (e.g., the dotted line 3 in fig. 4) may be simultaneously formed in the process, so that the first conductive structure 70 is electrically connected to the second electrode 32.
Therefore, compared with the mode 1, the manufacturing process of the via hole is reduced, the manufacturing process of the array substrate is simplified, the manufacturing difficulty of the array substrate is reduced, and the manufacturing efficiency of the array substrate is improved.
Specifically, in this mode 2, when the position of the first conductive structure is set, there may be the following cases:
case 1:
optionally, in the embodiment of the present invention, as shown in fig. 2 and fig. 4, the first conductive structure 70 and the first electrode 31 are made of the same material and are disposed in the same layer.
Therefore, the first conductive structure 70 can be simultaneously manufactured when the first electrode 31 is manufactured, the manufacturing process of the array substrate is simplified, the manufacturing difficulty of the array substrate is reduced, and the manufacturing efficiency of the array substrate is improved.
Case 2:
optionally, in an embodiment of the invention, as shown in fig. 3, the first circuit structure 20 includes a transistor, and the first conductive structure 70 and a source/drain (e.g., D2) of the transistor are made of the same material and disposed in the same layer. The source/drain of the transistor is made of metal.
Therefore, the first conductive structure 70 can be simultaneously manufactured when the source/drain electrode D2 of the transistor is manufactured, the manufacturing process of the array substrate is simplified, the manufacturing difficulty of the array substrate is reduced, and the manufacturing efficiency of the array substrate is improved.
Case 3:
optionally, in an embodiment of the present invention, as shown in fig. 5, the array substrate further includes: a conductive layer located between the first circuit structure 20 and the fingerprint identification structure 30, the conductive layer including a plurality of second conductive structures 80 arranged in an insulating manner, the first electrode 31 being electrically connected to the first circuit structure 20 through the second conductive structures 80;
the first conductive structure 70 and the second conductive structure 80 are made of the same material and are disposed on the same layer.
In practical applications, a data line (not shown) is formed on the array substrate, and the data line may be made of the same material and disposed on the same layer as the source/drain D2 of the transistor in the first circuit structure 20 shown in fig. 5. If the number of data lines is large, in order to avoid the occurrence of short circuit due to too small gap between the data lines and the adverse effect on the transmission of the display signal, part of the data lines and the source/drain electrodes D2 of the transistors may be made of the same material and be disposed in the same layer, and the rest of the data lines and the second conductive structures 80 may be made of the same material and be disposed in the same layer, so as to increase the gap between the data lines, avoid the occurrence of short circuit between the data lines, and ensure the normal and effective transmission of the display signal.
Therefore, under the condition, the first conductive structure and the second conductive structure can be made of the same material and arranged in the same layer, namely the first conductive structure is manufactured simultaneously when the second conductive structure is manufactured, so that the manufacturing process of the array substrate is simplified, the manufacturing difficulty of the array substrate is reduced, and the manufacturing efficiency of the array substrate is improved; meanwhile, the reliability of the display device is also improved.
For the three conditions, the setting can be carried out according to actual needs so as to meet the needs of different application scenes and improve the flexibility of design.
It should be noted that, optionally, in the embodiment of the present invention, referring to fig. 3, taking one transistor in the first circuit structure 20 as an example, a light shielding structure 90 may be disposed between the substrate 10 and the active layer Y to avoid adverse effects on the active layer Y of the transistor, so as to improve the performance of the transistor, thereby improving the performance of the first circuit structure 20 and improving the reliability of the display device.
The light shielding structure 90 may be made of any material that can achieve a light shielding effect, and is not limited herein; the size of the light shielding structure 90 may be any size that can ensure the active layer Y to operate normally, and is not particularly limited herein.
Based on the same inventive concept, an embodiment of the present invention provides a display panel, such as the specific structure of the display panel 100 in the schematic structural diagram of the display device w shown in fig. 8, which may include: an array substrate 101 and an opposite substrate 102 which are oppositely arranged, and a liquid crystal 103 which is positioned between the array substrate 101 and the opposite substrate 102;
the array substrate 101 is the array substrate provided in the embodiment of the present invention.
Based on the same inventive concept, an embodiment of the present invention provides a display device, as shown in fig. 8, which may include: the display panel comprises a backlight module 200 and a display panel 100 positioned on a light-emitting surface of the backlight module 200;
the display panel 100 is the display panel provided in the embodiment of the present invention.
In a specific implementation, the display device may be: any product or component with a display function, such as a mobile phone (as shown in fig. 9), a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. The display device can be implemented by referring to the above embodiments of the display panel, and repeated descriptions are omitted.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. An array substrate, comprising:
a substrate base plate;
and locate in proper order first circuit structure, fingerprint identification structure and pixel electrode above the substrate base plate, the fingerprint identification structure includes: the pixel electrode comprises a first electrode, a piezoelectric layer and a second electrode which are arranged in a stacked mode, wherein the second electrode is arranged between the piezoelectric layer and the pixel electrode, and the second electrode is multiplexed as a common electrode;
wherein the first circuit structure is electrically connected to the first electrode for: and providing a fingerprint driving signal to the first electrode, and carrying out fingerprint identification according to a fingerprint identification signal detected by the first electrode.
2. The array substrate of claim 1, wherein the fingerprint identification structure further comprises an insulating layer;
the insulating layer is disposed between the first electrode and the piezoelectric layer.
3. The array substrate of claim 1, wherein the array substrate further comprises: a second circuit structure electrically connected to the pixel electrode;
the second circuit structure is used for providing display signals for the pixel electrode;
the first circuit structure and the second circuit structure are arranged on the same layer.
4. The array substrate of claim 1, wherein the array substrate further comprises: a first conductive structure for providing a common signal;
the first conductive structure is located between the substrate base plate and the piezoelectric layer;
the first conductive structure is electrically connected to the second electrode.
5. The array substrate of claim 4, wherein the array substrate further comprises: and the first conductive structure is electrically connected with the second electrode through the bridging electrode.
6. The array substrate of claim 4, wherein the first conductive structure and the first electrode are of the same material and are disposed in the same layer.
7. The array substrate of claim 4, wherein the first circuit structure comprises a transistor, and the first conductive structure and a source/drain of the transistor are made of the same material and are disposed in the same layer.
8. The array substrate of claim 4, wherein the array substrate further comprises: the conducting layer is positioned between the first circuit structure and the fingerprint identification structure and comprises a plurality of second conducting structures which are arranged in an insulating mode, and the first electrode is electrically connected with the first circuit structure through the second conducting structures;
the first conductive structure and the second conductive structure are made of the same material and are arranged on the same layer.
9. The array substrate according to any one of claims 1 to 8, wherein the fingerprint identification structure is provided in plurality;
the second electrode and the piezoelectric layer are arranged on the whole surface, and the first electrodes are arranged in a plurality and mutually insulated.
10. A display panel, comprising: the liquid crystal display panel comprises an array substrate, an opposite substrate and liquid crystal, wherein the array substrate and the opposite substrate are oppositely arranged, and the liquid crystal is positioned between the array substrate and the opposite substrate;
wherein the array substrate is as claimed in any one of claims 1 to 9.
11. A display device, comprising: the display panel is positioned on a light-emitting surface of the backlight module;
wherein the display panel is as claimed in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205733.8A CN110865490A (en) | 2019-11-29 | 2019-11-29 | Array substrate, display panel and display device |
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| CN112133199A (en) * | 2020-09-29 | 2020-12-25 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113345944A (en) * | 2021-05-28 | 2021-09-03 | 京东方科技集团股份有限公司 | Display substrate, display method thereof and display device |
| CN113345917A (en) * | 2021-05-21 | 2021-09-03 | 武汉华星光电技术有限公司 | Array substrate, manufacturing method thereof and display panel |
| CN113642485A (en) * | 2021-08-18 | 2021-11-12 | 云谷（固安）科技有限公司 | Display panel and display device |
| CN114168011A (en) * | 2021-12-07 | 2022-03-11 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
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