CN111508386A - Ultrasonic display panel and display device - Google Patents
Ultrasonic display panel and display device Download PDFInfo
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- CN111508386A CN111508386A CN202010467088.3A CN202010467088A CN111508386A CN 111508386 A CN111508386 A CN 111508386A CN 202010467088 A CN202010467088 A CN 202010467088A CN 111508386 A CN111508386 A CN 111508386A
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- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 9
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
- A61B8/461—Displaying means of special interest
- A61B8/462—Displaying means of special interest characterised by constructional features of the display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The invention relates to the technical field of display, and discloses an ultrasonic display panel and a display device, wherein the ultrasonic display panel comprises a substrate base plate, the substrate base plate is divided into a plurality of sub-pixel units, and the ultrasonic display panel further comprises: the ultrasonic sensor is positioned in each sub-pixel unit of the substrate base plate and comprises a signal receiving end and a signal transmitting end, and the signal receiving end is electrically connected with the voltage supply circuit; the first insulating layer is positioned on one side, away from the substrate, of the ultrasonic sensor; and the light-emitting circuit is arranged on one side of the first insulating layer, which is far away from the ultrasonic sensor, and is positioned in each sub-pixel unit, the light-emitting circuit is electrically connected with a signal transmitting end of the ultrasonic sensor in each sub-pixel unit, and when the ultrasonic sensor is in a detection mode, an induction signal of the ultrasonic sensor controls the light-emitting circuit to display. The ultrasonic display panel realizes the simplification of ultrasonic detection, effectively shortens the detection time during ultrasonic detection, simplifies ultrasonic detection equipment and realizes the intelligent home idea.
Description
Technical Field
The invention relates to the technical field of display, in particular to an ultrasonic display panel and a display device.
Background
For ultrasonic detection, a specially-made wafer (called as a transducer) generates mechanical vibration under the excitation of electric pulses, the vibration generates ultrasonic pulses, the ultrasonic pulses are reflected or scattered back by a transmission medium in the transmission process, the echoes reflected or scattered back to the transducer at discontinuous physical properties in the medium are different, a receiving transducer can generate vibration, the vibration is converted into electric signals, and different processing is carried out on the electric signals, so that information such as the structure and the surface morphology of the transmission medium can be obtained.
Disclosure of Invention
The invention discloses an ultrasonic display panel and a display device, wherein an ultrasonic sensor is combined with the display panel, and the ultrasonic sensor can control a light-emitting circuit to display according to an induction signal in each sub-pixel unit, so that the display panel displays an image of a detected object, the ultrasonic detection is simplified, the detection time in the ultrasonic detection can be effectively shortened, the ultrasonic detection equipment is simplified, the detection economic cost of the ultrasonic detection is reduced, and the intelligent home idea is realized.
In order to achieve the purpose, the invention provides the following technical scheme:
an ultrasonic display panel, comprising a substrate base plate, wherein the substrate base plate is divided into a plurality of sub-pixel units, and the ultrasonic display panel further comprises:
the ultrasonic sensor is positioned in each sub-pixel unit of the substrate base plate and comprises a signal receiving end and a signal transmitting end, and the signal receiving end is electrically connected with a voltage supply circuit for inputting an electric signal;
a first insulating layer on a side of the ultrasonic sensor facing away from the substrate base plate;
and the light-emitting circuit is arranged on one side of the first insulating layer, which is far away from the ultrasonic sensor, and is positioned in each sub-pixel unit, the light-emitting circuit is electrically connected with a signal transmitting end of the ultrasonic sensor in each sub-pixel unit, and when the detection mode is in use, an induction signal of the ultrasonic sensor controls the light-emitting circuit to display.
The ultrasonic display panel comprises a substrate base plate, wherein the substrate base plate is divided into a plurality of sub-pixel units, a plurality of ultrasonic sensors are arranged on the substrate base plate, the ultrasonic sensors are arranged in one-to-one correspondence with the sub-pixel units, the ultrasonic sensors are arranged in the sub-pixel units, each ultrasonic sensor comprises a signal receiving end and a signal transmitting end, the signal receiving end is electrically connected with a voltage supply circuit for inputting a voltage signal, the voltage supply circuit supplies a certain voltage signal to the ultrasonic sensor, the ultrasonic sensor can generate ultrasonic waves and transmit the ultrasonic waves for detection, a first insulating layer is arranged on each ultrasonic sensor, a plurality of light emitting circuits are arranged on the first insulating layer, the light emitting circuits are arranged in the sub-pixel units and are arranged in one-to-one correspondence with the sub-pixel units, and in each sub-pixel unit, the light emitting circuits are connected with the signal transmitting ends of the ultrasonic sensors, when the ultrasonic display panel is in a detection mode, the ultrasonic sensor receives a voltage signal of the voltage supply circuit and generates ultrasonic waves, the ultrasonic waves are reflected or scattered back by a propagation medium (such as a human body) after being propagated, the ultrasonic sensor receives the reflected ultrasonic waves and generates induction signals, the ultrasonic sensor is electrically connected with the light-emitting circuit and sends the induction signals to the light-emitting circuit to control the light-emitting circuit to perform corresponding gray scale display, so that an image of the propagation medium is formed, the ultrasonic detection effect is achieved, the ultrasonic display combines the ultrasonic detection module and the display screen, the ultrasonic sensor can perform single-point control on the light-emitting circuit according to the induction signals in each sub-pixel unit to display, the resolution of medical detection imaging is met, a clear image of a detected object is formed, and the ultrasonic display panel has a medical use value, the ultrasonic sensor is introduced into the display unit, so that the simplification of ultrasonic detection equipment is realized, the ultrasonic detection is convenient, the ultrasonic sensor is combined with the display screen, the display screen can be applied to household appliances in life, people can carry out ultrasonic detection more conveniently in life, the monitoring of the user to the health of the body is facilitated, and the intelligent household concept is realized.
Therefore, in the ultrasonic display panel, the ultrasonic sensor is combined with the display panel, and in each sub-pixel unit, the ultrasonic sensor can control the light-emitting circuit to display according to the sensing signal, so that the display panel displays the image of the detected object, the ultrasonic detection is simple and convenient, the detection time in the ultrasonic detection can be effectively shortened, the ultrasonic detection equipment is simplified, the economic detection cost of the ultrasonic detection is reduced, and the intelligent home idea is realized.
Optionally, the light emitting circuit includes a driving circuit, and the driving circuit includes a TFT switch, a bottom electrode electrically connected to the TFT switch, a top electrode, and a light emitting module electrically connected to the top electrode and the top electrode.
Optionally, the light emitting module comprises O L ED, mini led, or Micro led.
Optionally, the ultrasonic sensor comprises: the piezoelectric material layer, locate the first electrode of piezoelectric material layer one side and locate the piezoelectric material layer deviates from the second electrode of one side of first electrode, first electrode with the second electrode respectively with supply to press the circuit electricity to be connected, just first electrode with the second electrode respectively with the luminescent circuit electricity is connected, wherein, first electrode with the second electrode with supply to press the electric connection of circuit switch on with first electrode with the second electrode with the electricity between the luminescent circuit switches on for time sequence control.
Optionally, the material of the piezoelectric material layer comprises polyvinylidene fluoride.
Optionally, the ultrasonic sensor includes an ultrasonic generating layer and an ultrasonic receiving layer that are insulated from each other, the ultrasonic receiving layer is located on a side of the ultrasonic generating layer away from the substrate, the ultrasonic generating layer includes a first piezoelectric material layer, a third electrode disposed on a side of the first piezoelectric material layer, and a fourth electrode disposed on a side of the first piezoelectric material layer away from the third electrode, and the third electrode and the fourth electrode are electrically connected to the voltage supply circuit respectively; the ultrasonic receiving layer comprises a second piezoelectric material layer, a fifth electrode arranged on one side of the second piezoelectric material layer and a sixth electrode arranged on one side of the second piezoelectric material layer, which is far away from the fifth electrode, wherein the fifth electrode and the sixth electrode are respectively and electrically connected with the light-emitting circuit; the electrical connection between the third electrode and the fourth electrode and the voltage supply circuit and the electrical connection between the fifth electrode and the sixth electrode and the light-emitting circuit are controlled in a time sequence.
Optionally, the first piezoelectric material layers located in each of the sub-pixel units are connected to each other and form an integrated structure.
Optionally, the material of the first piezoelectric material layer comprises polyvinylidene fluoride; and/or the material of the second piezoelectric material layer comprises polyvinylidene fluoride.
Optionally, a signal processing circuit is connected between the ultrasonic sensor and the light emitting circuit.
Based on the same inventive concept, the invention also provides a display device, which comprises any one of the ultrasonic display panels provided by the technical scheme.
Drawings
Fig. 1 is a schematic structural diagram of an ultrasonic display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an ultrasonic display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an ultrasonic display panel according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a film structure of an ultrasonic sensor and a light-emitting circuit in an ultrasonic display panel according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a film structure of an ultrasonic sensor and a light-emitting circuit in an ultrasonic display panel according to an embodiment of the present invention;
fig. 6a to 6c are schematic diagrams illustrating inverse piezoelectric effects of piezoelectric material layers according to embodiments of the present invention;
fig. 6d and fig. 6e are schematic diagrams illustrating the positive piezoelectric effect of the piezoelectric material layer according to the embodiment of the invention;
FIG. 7 is a schematic coordinate diagram illustrating timing control of ultrasonic wave generation and reception by an ultrasonic sensor according to an embodiment of the present invention;
FIG. 8 is a simplified circuit diagram of an ultrasound display panel in a detection mode according to an embodiment of the present invention;
fig. 9 is a simplified circuit diagram of an ultrasound display panel in a display mode according to an embodiment of the present invention;
icon: 1-a substrate base plate; 2-an ultrasonic sensor; 3-a first insulating layer; 4-a light emitting circuit; 21-a layer of piezoelectric material; 22-a first electrode; 23-a second electrode; 24-an ultrasound generating layer; 25-an ultrasound receiving layer; 41-TFT switch; 42-bottom electrode; 43-a top electrode; 44-a light emitting module; 241-a first voltage material layer; 242 — a third electrode; 243-a fourth electrode; 251-a second voltage material layer; 252-a fifth electrode; 253-sixth electrode.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1 and 4, an embodiment of the present invention provides an ultrasonic display panel, including a substrate 1, where the substrate 1 is divided into a plurality of sub-pixel units, and further including: the ultrasonic sensor 2 is positioned in each sub-pixel unit of the substrate base plate, the ultrasonic sensor 2 comprises a signal receiving end and a signal transmitting end, and the signal receiving end is electrically connected with a voltage supply circuit for inputting electric signals; a first insulating layer 3, wherein the first insulating layer 3 is positioned on one side of the ultrasonic sensor, which is far away from the substrate base plate 1; and the light-emitting circuit 4 is arranged on one side of the first insulating layer 3, which is away from the ultrasonic sensor 2, and is positioned in each sub-pixel unit, the light-emitting circuit 4 is electrically connected with a signal transmitting end of the ultrasonic sensor 2, and when in a detection mode, an induction signal of the ultrasonic sensor 2 controls the light-emitting circuit 4 to display.
The ultrasonic display panel comprises a substrate base plate, wherein the substrate base plate is divided into a plurality of sub-pixel units, a plurality of ultrasonic sensors are arranged on the substrate base plate, the ultrasonic sensors are arranged in one-to-one correspondence with the sub-pixel units, the ultrasonic sensors are arranged in the sub-pixel units, each ultrasonic sensor comprises a signal receiving end and a signal transmitting end, the signal receiving end is electrically connected with a voltage supply circuit for inputting a voltage signal, the voltage supply circuit supplies a certain voltage signal to the ultrasonic sensor, the ultrasonic sensor can generate ultrasonic waves and transmit the ultrasonic waves for detection, a first insulating layer is arranged on each ultrasonic sensor, a plurality of light emitting circuits are arranged on the first insulating layer, the light emitting circuits are arranged in the sub-pixel units and are arranged in one-to-one correspondence with the sub-pixel units, and in each sub-pixel unit, the light emitting circuits are connected with the signal transmitting ends of the ultrasonic sensors, when the ultrasonic display panel is in a detection mode, the ultrasonic sensor receives a voltage signal of the voltage supply circuit and then generates ultrasonic waves, the ultrasonic waves are reflected or scattered back by a propagation medium (such as a human body) after being propagated, then the ultrasonic sensor receives the reflected ultrasonic waves and generates sensing signals, the ultrasonic sensor is electrically connected with the light-emitting circuit and sends the sensing signals to the light-emitting circuit so as to control the light-emitting circuit to perform corresponding gray scale display, for example, when the ultrasonic display panel is detected by the human body, the ultrasonic sensors are reflected by the human body after being detected, the human body comprises epithelial tissues, muscle tissues, nerve tissues, connective tissues, blood and other liquid tissues, acoustic impedance of different tissues is not uniformly distributed, each ultrasonic sensor receives different reflected waves and generates different sensing signals, and the different sensing signals are input into the corresponding light-emitting circuit to realize echo ultrasonic imaging, reach ultrasonic testing's effect, above-mentioned ultrasonic display combines ultrasonic testing module and display screen, in each sub-pixel unit, ultrasonic sensor can carry out single-point control to luminescent circuit according to sensing signal and show, satisfy the resolution ratio that medical treatment detected the formation of image, thereby form the clear image that is detected the object, medical use value has, introduce ultrasonic sensor in the display element, realize ultrasonic testing equipment simplification, make ultrasonic testing convenient, and, combine ultrasonic sensor and display screen, the display screen also can be for being applied to the house display electrical apparatus in the life, make people can more conveniently carry out ultrasonic testing in the life, be favorable to user self to healthy control, intelligent house theory has been realized.
Therefore, in the ultrasonic display panel, the ultrasonic sensor is combined with the display panel, and in each sub-pixel unit, the ultrasonic sensor can control the light-emitting circuit to display according to the sensing signal, so that the display panel displays the image of the detected object, the ultrasonic detection is simple and convenient, the detection time in the ultrasonic detection can be effectively shortened, the ultrasonic detection equipment is simplified, the economic detection cost of the ultrasonic detection is reduced, and the intelligent home idea is realized.
As shown in fig. 4, in each sub-pixel unit of the ultrasonic display panel, the light emitting circuit 4 includes a driving circuit, the driving circuit includes a TFT switch 41, a bottom electrode 42 electrically connected to the TFT switch 41, a top electrode 43, and a light emitting module 44 electrically connected to the bottom electrode 42 and the top electrode 43, specifically, the light emitting module includes O L ED, mini led, or Micro led, the ultrasonic display panel is a display panel in which sub-pixels can be controlled by a single point, and has a high resolution, and can form an image with a high resolution, as shown in fig. 8, when performing ultrasonic detection, the ultrasonic sensor 2 is electrically connected to the light emitting circuit 4, can detect an image, and form a relatively clear image, and improve the accuracy of medical diagnosis, as shown in fig. 9, in the display mode, the light emitting circuit 4 is also electrically connected to a driving IC, so that the ultrasonic display panel can perform normal display, so that the ultrasonic display panel can have both a detection mode and a display mode, and can have a detection display function, as well as household or other display functions, and display screen resolution is relatively clear and reliable.
For the structural arrangement of the ultrasonic sensor, there can be multiple setting modes, such as:
the first method is as follows:
referring to fig. 4, as shown in fig. 6a, fig. 6a is a schematic diagram of an internal structure of an ultrasonic sensor, where the ultrasonic sensor includes: the light-emitting diode comprises a piezoelectric material layer 21, a first electrode 22 arranged on one side of the piezoelectric material layer 21, and a second electrode 23 arranged on one side of the piezoelectric material layer 21, which is far away from the first electrode 22, wherein the first electrode 22 and the second electrode 23 are respectively electrically connected with a voltage supply circuit, and the first electrode 22 and the second electrode 23 are respectively electrically connected with the light-emitting circuit, and the electrical connection conduction between the first electrode and the voltage supply circuit and the electrical connection conduction between the first electrode and the light-emitting circuit and between the second electrode and the light-emitting circuit are time sequence control.
Referring to fig. 6b and 6c and fig. 6d and 6e for the technical principle of generating and receiving ultrasonic waves by the piezoelectric material layer, and fig. 6a is a schematic diagram of the piezoelectric material layer in an initial state (no electric signal is applied and no ultrasonic wave is received), wherein, as shown in fig. 6b and 6c, a positive electric signal is applied to the piezoelectric material layer 21, the piezoelectric wafer in the piezoelectric material layer 21 is stretched, a negative signal is applied, the piezoelectric wafer is compressed, an alternating electric signal is applied to two ends of the piezoelectric material layer, so that the piezoelectric wafer generates mechanical vibration with corresponding frequency, the phenomenon that the electric energy is converted into mechanical energy is called inverse piezoelectric effect, a high-frequency (2 MHz-10 MHz) electric pulse signal is applied to the surface of the piezoelectric material layer (inverse piezoelectric effect), and the piezoelectric wafer generates a pulse type ultrasonic signal commonly used for diagnosis, thereby generating ultrasound; as shown in fig. 6d and 6e, if a mechanical pressure or vibration is applied to the piezoelectric wafer, an electric charge is generated on the surface of the piezoelectric material layer 21, and this phenomenon of converting mechanical energy into electric energy is called a positive piezoelectric effect, when an ultrasonic wave is applied to the piezoelectric material, the piezoelectric wafer is deformed by stretching and contracting, and an alternating electric potential is generated at the same time, and the electric potential is processed, that is, an induction signal of the ultrasonic sensor is formed, and is transmitted to the light emitting circuit, so that the light emitting circuit can be controlled to emit light for display.
As shown in fig. 7, the ultrasonic sensor adopts time-series control by applying an electric signal to the piezoelectric material layer and receiving an ultrasonic wave, that is, when the electric signal is applied to the piezoelectric material layer, the voltage supply circuit forms a path with the first electrode and the second electrode to apply the electric signal to the piezoelectric material layer to generate the ultrasonic wave, as shown in a period a in the figure, and at the same time, the first electrode and the second electrode are electrically disconnected from the light emitting circuit, which is in an open circuit state; after the ultrasonic wave is generated, the ultrasonic sensor needs to receive the ultrasonic wave, as shown in a time period B in fig. 7, the voltage supply circuit is disconnected with the first electrode and the second electrode to form an open circuit state, the light emitting circuit is electrically connected and conducted with the first electrode and the second electrode to form a path, when the piezoelectric material receives the reflected ultrasonic wave to generate an induction signal, the induction signal is transmitted to the light emitting circuit to control the light emitting circuit to perform corresponding display, and the ultrasonic sensor adopts a single-layer piezoelectric material layer to realize the generation and the reception of the ultrasonic wave.
Specifically, as shown in fig. 4, for the specific connection between the ultrasonic sensor and the light-emitting circuit, the driving circuit of the light-emitting circuit may include a TFT switch 41, a bottom electrode 42 electrically connected to the TFT switch 41, a top electrode 43, and a light-emitting module 44 electrically connected to the bottom electrode 42 and the top electrode 43, where the bottom electrode may be a pixel electrode, the top electrode may be a common electrode, the first electrode 22 in the ultrasonic sensor is connected to a fixed potential and may be grounded, the second electrode 23 may be electrically connected to the common electrode of the light-emitting circuit, when the ultrasonic display panel is in the detection mode, the pixel electrode of the light-emitting circuit is provided with the fixed potential, and the sensing signal generated by the ultrasonic sensor is transmitted to the common electrode, so that the light-emitting module performs light-emitting display; or, the second electrode may also be electrically connected to a pixel electrode of the light-emitting circuit, when the ultrasound display panel is in the detection mode, a fixed potential is provided to the common electrode of the light-emitting circuit, and the sensing signal generated by the ultrasound sensor is transmitted to the pixel electrode, so that the light-emitting module performs light-emitting display.
In the first embodiment, the piezoelectric material layer may be made of polyvinylidene fluoride or other piezoelectric polymers, and the embodiment is not limited.
The second method comprises the following steps:
as shown in fig. 2 and 5, the ultrasonic sensor 2 includes an ultrasonic generating layer 24 and an ultrasonic receiving layer 25 which are insulated from each other, the ultrasonic receiving layer 25 is located on a side of the ultrasonic generating layer 24 which is away from the substrate, the ultrasonic generating layer 24 includes a first piezoelectric material layer 241, a third electrode 242 which is arranged on a side of the first piezoelectric material layer 241, and a fourth electrode 243 which is arranged on a side of the first piezoelectric material layer which is away from the third electrode, and the third electrode 242 and the fourth electrode 243 are respectively electrically connected with a voltage supply circuit; the ultrasonic receiving layer 25 comprises a second piezoelectric material layer 251, a fifth electrode 252 arranged on one side of the second piezoelectric material layer 251 and a sixth electrode 253 arranged on one side of the second piezoelectric material layer, which is far away from the fifth electrode, wherein the fifth electrode 252 and the sixth electrode 253 are respectively and electrically connected with the light-emitting circuit; and the electric connection and conduction of the third electrode and the fourth electrode and the voltage supply circuit and the electric connection and conduction of the fifth electrode and the sixth electrode and the light-emitting circuit are time sequence control.
The technical principle of generating ultrasonic waves for the first piezoelectric material layer and receiving ultrasonic waves for the second piezoelectric material layer is as follows: applying a positive electric signal to the first piezoelectric material layer, stretching a piezoelectric wafer in the first piezoelectric material layer, applying a negative signal to compress the piezoelectric wafer, applying alternating electric signals to two ends of the first piezoelectric material layer, so that the piezoelectric wafer can generate mechanical vibration with corresponding frequency, the phenomenon that the electric energy is converted into the mechanical energy is called inverse piezoelectric effect, and applying a high-frequency (2 MHz-10 MHz) electric pulse signal (inverse piezoelectric effect) to the surface of the first piezoelectric material layer, so that the piezoelectric wafer can generate pulse type ultrasonic signals commonly used for diagnosis, thereby generating ultrasonic waves; in the second piezoelectric material layer, if mechanical pressure or vibration is applied to the piezoelectric wafer, electric charge can be generated on the surface of the second piezoelectric material layer, the phenomenon that the mechanical energy is converted into electric energy is called positive piezoelectric effect, when ultrasonic waves act on the piezoelectric material, the piezoelectric wafer is made to stretch and deform, and meanwhile, alternating potential can be generated, the potential is processed, namely, induction signals of the ultrasonic sensor are formed and transmitted to the light-emitting circuit, light-emitting display of the light-emitting circuit can be controlled, the generation of the ultrasonic waves and the reception of the ultrasonic waves are completed by adopting two mutually isolated piezoelectric material layers, mutual interference is avoided, and the stability of signal transmission is favorably improved;
in addition, the ultrasonic sensor adopts time sequence control for applying an electric signal to the first piezoelectric material layer and receiving ultrasonic waves by the second piezoelectric material layer, namely, when the electric signal is applied to the first piezoelectric material layer, the voltage supply circuit, the third electrode and the fourth electrode form a passage to apply the electric signal to the piezoelectric material layer to generate the ultrasonic waves, meanwhile, the fifth electrode and the sixth electrode are disconnected from the light-emitting circuit and are in an open circuit state, after the ultrasonic waves are generated, the voltage supply circuit is disconnected from the third electrode and the fourth electrode to form an open circuit state, the light-emitting circuit is electrically connected and conducted with the fifth electrode and the sixth electrode to form a passage, when the second piezoelectric material receives the reflected ultrasonic waves to generate induction signals, the induction signals are transmitted to the light-emitting circuit to control the light-emitting circuit to correspondingly display, and the ultrasonic sensor adopts two piezoelectric material layers to realize the generation and the receiving of the ultrasonic waves, and signal transmission control is carried out on the first piezoelectric material layer and the second piezoelectric material layer in a time sequence control mode, mutual interference is avoided, and signal transmission stability is facilitated.
Specifically, as shown in fig. 5, for the specific connection between the ultrasound sensor and the light-emitting circuit in the second mode, the driving circuit of the light-emitting circuit may include a TFT switch 41, a bottom electrode 42 electrically connected to the TFT switch 41, a top electrode 43, and a light-emitting module 44 electrically connected to the bottom electrode 42 and the top electrode 43, where the bottom electrode is a pixel electrode, the top electrode is a common electrode, the fifth electrode 252 in the ultrasound sensor is connected to a fixed potential and may be grounded, the sixth electrode 253 may be electrically connected to the common electrode of the light-emitting circuit, when the ultrasound display panel is in the detection mode, the fixed potential is provided to the pixel electrode of the light-emitting circuit, and the sensing signal generated by the ultrasound sensor is transmitted to the common electrode, so that the light-emitting module performs light-emitting display; or, the sixth electrode may also be electrically connected to a pixel electrode of the light-emitting circuit, when the ultrasound display panel is in the detection mode, a fixed potential is provided to the common electrode of the light-emitting circuit, and the sensing signal generated by the ultrasound sensor is transmitted to the pixel electrode, so that the light-emitting module performs light-emitting display.
As shown in fig. 3, in the second mode, the structural arrangement of the second piezoelectric material layer can make the first piezoelectric material layers in each sub-pixel unit connected to each other and form an integrated structure, that is, the ultrasonic receiving layer in each sub-pixel unit forms the ultrasonic receiving layer 25 with an integrated structure, so that the structure is simple and reliable, and the fabrication is simple.
In the second embodiment, the material of the first piezoelectric material layer includes polyvinylidene fluoride; and/or the material of the second piezoelectric material layer comprises polyvinylidene fluoride.
Specifically, a signal processing circuit is connected between the ultrasonic sensor and the light emitting circuit, the ultrasonic sensor receives ultrasonic waves to generate an induction signal, and the signal processing circuit can be a signal amplifying circuit, amplifies the induction signal and then transmits the amplified induction signal to the light emitting circuit; alternatively, the signal processing circuit may be a signal reduction circuit that reduces the sensing signal and transmits the reduced sensing signal to the light emitting circuit.
Based on the same inventive concept, the embodiment further provides a display device, which includes any one of the ultrasonic display panels provided by the embodiments, and the ultrasonic display panel can be a large-size display panel or a mirror display panel, so that the combination of ultrasonic detection and household display appliances can be realized, and the multifunction and intellectualization of household appliances can be realized.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of 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 (10)
1. An ultrasonic display panel, includes the substrate base plate, the substrate base plate divide into a plurality of sub pixel unit, its characterized in that still includes:
the ultrasonic sensor is positioned in each sub-pixel unit of the substrate base plate and comprises a signal receiving end and a signal transmitting end, and the signal receiving end is electrically connected with a voltage supply circuit for inputting an electric signal;
a first insulating layer on a side of the ultrasonic sensor facing away from the substrate base plate;
and the light-emitting circuit is arranged on one side of the first insulating layer, which is far away from the ultrasonic sensor, and is positioned in each sub-pixel unit, the light-emitting circuit is electrically connected with a signal transmitting end of the ultrasonic sensor in each sub-pixel unit, and when the detection mode is in use, an induction signal of the ultrasonic sensor controls the light-emitting circuit to display.
2. The ultrasonic display panel of claim 1, wherein the light emitting circuit comprises a driving circuit comprising a TFT switch, a bottom electrode electrically connected to the TFT switch, a top electrode, and a light emitting module electrically connected to the top electrode and the top electrode.
3. The ultrasonic display panel of claim 2, wherein the light emitting module comprises O L ED, miniled, or Micro led.
4. The ultrasonic display panel of claim 1, wherein the ultrasonic sensor comprises: the piezoelectric material layer, locate the first electrode of piezoelectric material layer one side and locate the piezoelectric material layer deviates from the second electrode of one side of first electrode, first electrode with the second electrode respectively with supply to press the circuit electricity to be connected, just first electrode with the second electrode respectively with the luminescent circuit electricity is connected, wherein, first electrode with the second electrode with supply to press the electric connection of circuit switch on with first electrode with the second electrode with the electricity between the luminescent circuit switches on for time sequence control.
5. The ultrasonic display panel of claim 4, wherein the material of the piezoelectric material layer comprises polyvinylidene fluoride.
6. The ultrasonic display panel according to claim 1, wherein the ultrasonic sensor comprises an ultrasonic generating layer and an ultrasonic receiving layer which are insulated from each other, the ultrasonic receiving layer is located on a side of the ultrasonic generating layer facing away from the substrate, the ultrasonic generating layer comprises a first piezoelectric material layer, a third electrode arranged on a side of the first piezoelectric material layer, and a fourth electrode arranged on a side of the first piezoelectric material layer facing away from the third electrode, and the third electrode and the fourth electrode are respectively electrically connected with the voltage supply circuit; the ultrasonic receiving layer comprises a second piezoelectric material layer, a fifth electrode arranged on one side of the second piezoelectric material layer and a sixth electrode arranged on one side of the second piezoelectric material layer, which is far away from the fifth electrode, wherein the fifth electrode and the sixth electrode are respectively and electrically connected with the light-emitting circuit; the electrical connection between the third electrode and the fourth electrode and the voltage supply circuit and the electrical connection between the fifth electrode and the sixth electrode and the light-emitting circuit are controlled in a time sequence.
7. The ultrasonic display panel of claim 6, wherein the first piezoelectric material layers within each of the sub-pixel units are connected to each other and form a unitary structure.
8. The ultrasonic display panel of claim 6, wherein the material of the first piezoelectric material layer comprises polyvinylidene fluoride; and/or the material of the second piezoelectric material layer comprises polyvinylidene fluoride.
9. The ultrasonic display panel according to claim 1, wherein a signal processing circuit is connected between the ultrasonic sensor and the light emitting circuit.
10. A display device comprising the ultrasonic display panel according to any one of claims 1 to 9.
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