CN112445014A - Display module and display device - Google Patents

Display module and display device Download PDF

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Publication number
CN112445014A
CN112445014A CN202011442413.7A CN202011442413A CN112445014A CN 112445014 A CN112445014 A CN 112445014A CN 202011442413 A CN202011442413 A CN 202011442413A CN 112445014 A CN112445014 A CN 112445014A
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China
Prior art keywords
substrate
electrode
voltage
display
display module
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Granted
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CN202011442413.7A
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Chinese (zh)
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CN112445014B (en
Inventor
邓卓
何春燕
沈柏平
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • 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
    • G02F1/1341—Filling or closing of cells
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136213—Storage capacitors associated with the pixel electrode
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers

Abstract

The invention discloses a display module and a display device, wherein the display module comprises a display panel and a zooming panel, and the display panel comprises a plurality of first electrodes; the zoom panel comprises liquid drops clamped between a first substrate and a second substrate, the first substrate is positioned on one side of the second substrate far away from the light-emitting surface, the first substrate comprises a first substrate, one side of the first substrate close to the second substrate comprises a plurality of induction electrodes, and the second substrate comprises an opposite electrode; in the direction perpendicular to the plane of the first substrate base plate, the induction electrode is at least partially overlapped with the first electrode; the display module comprises a display stage and a zooming stage, wherein the display stage transmits a first voltage to the first electrode, no voltage difference exists between the induction electrode and the opposite electrode, and the contact angle of the liquid drop is 0 degree; the zooming stage transmits a second voltage to the first electrode, a voltage difference exists between the induction electrode and the opposite electrode, and the contact angle of the liquid drop is larger than 0 degrees. The zooming function of the display module is realized by controlling the change of the contact angle of the liquid drop.

Description

Display module and display device
Technical Field
The invention relates to the technical field of display, in particular to a display module and a display device.
Background
The head-up display is called a parallel display system for short HUD, and refers to a multifunctional instrument panel which is operated by a driver in a blind mode. The automobile navigation system has the function of projecting important driving information such as speed per hour, navigation and the like onto a windshield in front of a driver, so that the driver can see the important driving information such as speed per hour, navigation and the like without lowering head or turning head as much as possible.
In existing HUD displays, it is often based on projection-type techniques, i.e. imaging on the windshield. Generally, the focal length of the HUD is usually a single focal length, since the HUD's condenser system and reflector system are fixed. However, in the practical application process, since the HUD needs to face the complex road condition, the focal length required to be displayed should be correspondingly changed according to the complex real environment, so that the visual interference brought to the driver due to the non-uniform focal length can be avoided.
Disclosure of Invention
In view of this, the present invention provides a display module and a display device, so that the display module and the display device have a zoom function.
On one hand, the invention provides a display module, which comprises a display panel and a zooming panel which are oppositely arranged, wherein the zooming panel is positioned on one side of the display panel close to a light-emitting surface;
the display panel includes a first electrode layer including a plurality of first electrodes;
the zoom panel comprises a first substrate and a second substrate which are arranged oppositely, and a medium layer clamped between the first substrate and the second substrate, wherein the medium layer comprises liquid drops, the first substrate is positioned on one side, far away from the light emergent surface, of the second substrate, the first substrate comprises a first substrate, one side, close to the second substrate, of the first substrate comprises a plurality of induction electrodes, and the second substrate comprises opposite electrodes;
in the direction perpendicular to the plane of the first substrate base plate, the sensing electrode is at least partially overlapped with the first electrode;
the display module comprises a display stage and a zooming stage, wherein in the display stage, a first voltage is transmitted to the first electrode, no voltage difference exists between the induction electrode and the opposite electrode, and the contact angle of the liquid drop is 0 degree; and in a zooming stage, transmitting a second voltage to the first electrode, wherein the sensing electrode and the first electrode form a capacitance structure, a voltage difference is formed between the sensing electrode and the opposite electrode, and the contact angle of the liquid drop is larger than 0 degrees.
On the other hand, the invention also provides a display device which comprises the display module.
Compared with the prior art, the display module and the display device provided by the invention at least realize the following beneficial effects:
the display module comprises a display panel and a zooming panel which are oppositely arranged, wherein the zooming panel is positioned on one side of the display panel close to a light-emitting surface and is used for zooming the display panel; the zoom panel comprises a first substrate, a second substrate and a medium layer, wherein the first substrate and the second substrate are arranged oppositely, the medium layer is clamped between the first substrate and the second substrate and comprises liquid drops, the first substrate is positioned on one side, far away from the light-emitting surface, of the second substrate, the first substrate comprises a first substrate base plate, one side, close to the second substrate, of the first substrate base plate comprises a plurality of induction electrodes, and the second substrate comprises an opposite electrode; in the direction perpendicular to the plane of the first substrate base plate, the induction electrode is at least partially overlapped with the first electrode; the display module comprises a display stage and a zooming stage, wherein in the display stage, a first voltage is transmitted to the first electrode, no voltage difference exists between the induction electrode and the opposite electrode, the contact angle of the liquid drop is 0 degrees, the light emitted by the display panel cannot be refracted when passing through the liquid drop of the zooming panel, so that the light emitting route cannot be changed, and the zooming panel has no focusing effect on the display panel; in the zooming stage, a second voltage is transmitted to the first electrode, the induction electrode and the first electrode form a capacitance structure, when the voltage of the first electrode changes, the voltage value of the induction electrode also changes to the second voltage, at the moment, a voltage difference exists between the induction electrode and the opposite electrode, the contact angle of the liquid drop is larger than 0 degree, when the light-emitting of the display panel passes through the liquid drop of the zooming panel, the light can be refracted, the focal length of the light-emitting changes, the zooming panel focuses on the light-emitting of the display panel, and when the voltage values of the second voltage are different, the voltage difference between the induction electrode and the opposite electrode is also different, the contact angle of the liquid drop is also different, so that the focal length is changed. According to the invention, the capacitance structure is formed by the first electrode in the display panel and the induction electrode in the zooming panel, so that the induction electrode generates the voltage equal to the first electrode, the voltage difference is generated between the induction electrode and the opposite electrode in the zooming panel, the focal length of the display module is changed, and the display module has the zooming function.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic plan view of a display module according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is a further sectional view taken along line A-A' of FIG. 1;
FIG. 4 is a further sectional view taken along line A-A' of FIG. 1;
FIG. 5 is a further sectional view taken along line A-A' of FIG. 1;
FIG. 6 is a further sectional view taken along line A-A' of FIG. 1;
FIG. 7 is an amplifying circuit diagram provided by the present invention;
FIG. 8 is a schematic plan view of a display module according to another embodiment of the present invention;
FIG. 9 is a cross-sectional view taken along line B-B' of FIG. 8;
FIG. 10 is a further sectional view taken along line B-B' of FIG. 8;
FIG. 11 is a further sectional view taken along line B-B' of FIG. 8;
FIG. 12 is a further sectional view taken along line A-A' of FIG. 1;
FIG. 13 is a further sectional view taken along line A-A' of FIG. 1;
fig. 14 is a schematic view of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, fig. 1 is a schematic plan structure view of a display module according to the present invention, fig. 2 is a sectional view taken along a direction a-a ' in fig. 1, fig. 3 is another sectional view taken along a direction a-a ' in fig. 1, fig. 4 is another sectional view taken along a direction a-a ' in fig. 1, fig. 2 is a sectional view of the display module at a display stage, fig. 3 and fig. 4 are sectional views of the display module at a zoom stage, wherein fig. 3 and fig. 4 show that the focal lengths of the display module are different.
Referring to fig. 1 to 4, the display module 100 includes a display panel 1 and a zoom panel 2 disposed opposite to each other, and the zoom panel 2 is located on one side of the display panel 1 close to the light emitting surface OU;
it can be understood that, along the first direction X, the display panel 1 and the zoom panel 2 are disposed opposite to each other, and the zoom panel 2 is configured to zoom light emitted from the display panel 1, where the display panel 1 may be a liquid crystal display panel, and may also be an organic self-luminous display panel, and the type of the display panel 1 is not particularly limited.
The display panel 1 includes a first electrode layer 3, the first electrode layer 3 including a plurality of first electrodes 4;
in some alternative embodiments, the first electrode 4 may be an original electrode in the display panel, or may be an electrode separately disposed on the basis of the original display panel. The first electrodes 4 may be arranged in an array, and are not limited in this regard.
The zoom panel 2 comprises a first substrate 5 and a second substrate 6 which are oppositely arranged, and a medium layer 7 which is clamped between the first substrate 5 and the second substrate 6, wherein the medium layer 7 comprises liquid drops 8, the first substrate 5 is positioned on one side of the second substrate 6 far away from the light emitting surface OU, the first substrate 5 comprises a first substrate 9, one side of the first substrate 9 close to the second substrate 6 comprises a plurality of induction electrodes 10, and the second substrate 6 comprises an opposite electrode 11;
the induction electrode 10 at least partially overlaps the first electrode 4 in a direction perpendicular to the plane of the first substrate base plate 9;
the display module 100 comprises a display stage and a zooming stage, wherein in the display stage, a first voltage is transmitted to the first electrode 4, no voltage difference exists between the induction electrode 10 and the opposite electrode 11, and the contact angle of the liquid drop 8 is 0 degree; in the zooming stage, a second voltage is transmitted to the first electrode 4, the sensing electrode 10 and the first electrode 4 form a capacitance structure, a voltage difference exists between the sensing electrode 10 and the opposite electrode 11, and the contact angle of the liquid drop 8 is larger than 0 °.
The variable focus panel 2 in the present invention is based on electrowetting display technology, where wetting refers to the process of replacing one fluid of a solid surface by another fluid. The liquid can spread on the solid surface, and the solid-liquid contact surface has a tendency of expansion, namely the adhesive force of the liquid to the solid surface is greater than the cohesive force of the liquid, namely wetting. The liquid can not spread on the solid surface, and the contact surface has the tendency of shrinking into a spherical shape, namely, the liquid is not wetted, or the liquid has smaller adhesive force to the solid surface than the cohesive force. Electrowetting is a phenomenon in which the wettability of a liquid droplet on a substrate, that is, a contact angle, is changed by changing a voltage between the liquid droplet and an insulating substrate, and the liquid droplet is deformed or displaced. Along first direction X, first base plate 5 and second base plate 6 are relative setting, are dielectric layer 7 between first base plate 5 and second base plate 6, have liquid drop 8 in the dielectric layer 7, still have hydrophobic material layer in the dielectric layer 7 certainly, and immiscible between hydrophobic material layer and the liquid drop 8, and liquid drop 8 can be hydrophilic material, such as ethanol, methyl alcohol, water, etc. certainly for further adjusting the electric infiltration performance of liquid drop 8, also can add surfactant etc. wherein. When an electrical potential is applied to the array of sensing electrodes 10 beneath the dielectric film, the wetting characteristics of the dielectric film with the surface liquid can be altered. When the liquid is on the surface of the hydrophobic layer, the contact angle of the liquid can be controlled to change by applying voltage, so that the property of the liquid surface can be changed.
Of course, the sensing electrodes 10 may be arranged in an array, the opposite electrodes 11 may be arranged on the whole surface, and the opposite electrodes 11 may also be arranged in an array, which is not limited herein.
Optionally, the first electrode 4, the sensing electrode 10, and the opposite electrode 11 may be transparent electrodes, and the material may be ITO (indium tin oxide), and when the transparent electrodes are used, the opening area of the display panel is not affected, and the light extraction rate is not affected.
It can be understood that, in a direction perpendicular to the plane of the first substrate 9, the sensing electrode 10 at least partially overlaps the first electrode 4, and the sensing electrode 10 and the first electrode 4 form a capacitance structure, and according to the property of the capacitance structure, when the voltage of one plate changes, the voltage of the other plate also changes, so that after the voltage is applied to the first electrode 4, the voltage of the sensing electrode 10 also changes with the first electrode 4 and is equal to the voltage of the first electrode 4.
Referring to fig. 2, in the display phase, a first voltage is transmitted to the first electrode 4, there is no voltage difference between the sensing electrode 10 and the opposite electrode 11, and the contact angle of the droplet 8 is 0 °, as described above, when the first voltage is transmitted to the first electrode 4, the voltage of the sensing electrode 10 also becomes the first voltage, and certainly, the voltage input to the opposite electrode also needs to be the first voltage, so that the voltage difference between the sensing electrode 10 and the opposite electrode 11 can be 0, and the light emitted from the display panel 1 passes through the droplet of the zoom panel 2 without being refracted, and is emitted in the direction perpendicular to the plane of the first substrate, so the light emitting path of the display panel does not change, and the zoom panel does not have a focusing effect on the display panel.
Referring to fig. 3 and 4, in the zooming stage, a second voltage is transmitted to the first electrode 4, since the sensing electrode 10 and the first electrode 4 form a capacitance structure, when the voltage of the first electrode 4 changes, the voltage value of the sensing electrode 10 also changes to the second voltage, certainly, the voltage input to the opposite electrode 11 is not equal to the second voltage, at this time, a voltage difference exists between the sensing electrode 10 and the opposite electrode 11, the liquid drop 8 is divided into a plurality of small liquid drops, and the contact angle of the liquid drop is greater than 0 °, when the light output from the display panel 1 passes through the liquid drop of the zooming panel 2, the light is refracted, the focal length of the light output changes, and the zooming panel 2 focuses the light output from the display panel 1. As can be seen from fig. 3 and 4, when the voltage values of the second voltages are different, the voltage difference between the sensing electrode and the opposite electrode is different, the contact angle of the liquid droplet 8 is different, and the focal distance is different, and in fig. 3, the contact angle is smaller, while in fig. 4, the contact angle is larger, so the focal distance of the display module in fig. 3 is smaller than that of the display module in fig. 4.
The voltage of the inductive electrode 10 may be larger or smaller than the voltage of the counter electrode 11, for example, the voltage of the inductive electrode 10 is 5V and the voltage of the counter electrode 11 is 3V, but it is needless to say that the voltage of the inductive electrode is 3V and the voltage of the counter electrode 11 is 5V, or the voltage of the inductive electrode 10 is 2V and the voltage of the counter electrode 11 is-2V, as long as a voltage difference exists between the inductive electrode 10 and the counter electrode 11.
Compared with the prior art, the embodiment has at least the following beneficial effects:
according to the invention, a capacitance structure is formed by the first electrode 4 in the display panel 1 and the induction electrode 10 in the zooming panel 2, so that the induction electrode 10 generates a voltage equal to that of the first electrode 4, the induction electrode 10 in the zooming panel 2 and the opposite electrode 11 have a voltage difference, the contact angle of the liquid drop 8 is larger than 0 degree, when the light emitted from the display panel 1 passes through the liquid drop of the zooming panel 2, the light can be refracted, the focal length of the light emitted is changed, and the zooming panel 2 focuses the light emitted from the display panel 1.
In addition, because the plurality of first electrodes 4 are provided, and the sensing electrodes 10 and the first electrodes 4 are in one-to-one correspondence, the voltage variation of different areas of the zoom panel 2 and the corresponding image display can be controlled, and the function of focal length variation of different positions of the same image is realized.
In some alternative embodiments, referring to fig. 5, fig. 5 is a cross-sectional view taken along a-a' direction in fig. 1, and fig. 5 is a cross-sectional view of the display module at a zooming stage.
One side of the induction electrode 10, which is far away from the first substrate base plate 9, comprises an amplifying circuit 12, the amplifying circuit 12 is electrically connected with the induction electrode 10, one side of the amplifying circuit 12, which is far away from the first substrate base plate 9, comprises an amplifying electrode 13, and the amplifying electrode 13 is electrically connected with the amplifying circuit 12;
the amplifying electrode 13 at least partially overlaps the counter electrode 11 in a direction perpendicular to the plane of the first substrate base plate 9;
the amplifier circuit 12 amplifies the second voltage of the inductive electrode 10 to a third voltage and transmits the third voltage to the amplifier electrode 13, and the difference in voltage between the amplifier electrode 13 and the counter electrode 11 changes the contact angle of the liquid droplet 8.
It is understood that the amplifying circuit 12 in this embodiment is used to amplify the voltage on the sensing electrode 10, but any type of amplifying circuit may be used as long as it can amplify the voltage, and the amplifying circuit is not limited thereto.
In this embodiment, the discharge circuit 12 is electrically connected to the sensing electrode 10 and the amplifying electrode 13, and amplifies the voltage on the sensing electrode 10 and transmits the amplified voltage to the amplifying electrode 13, for example, the second voltage on the sensing electrode 10 is 5V, and the amplified second voltage can be amplified to 10V by the amplifying circuit 12, so that the voltage difference between the amplifying electrode 13 and the opposite electrode 11 can be further increased, which is beneficial to controlling the contact angle of the liquid drop 8 to change, thereby generating different focusing effects at different positions, thereby realizing the synergistic effect of the display panel 1 and the zoom panel 2, and simultaneously controlling the voltage change of different areas of the zoom panel 2 and the display of corresponding pictures, and realizing the function of the focal length change at different positions of the same picture.
In some alternative embodiments, referring to fig. 6 and 7, fig. 6 is a further cross-sectional view taken along line a-a' of fig. 1, and fig. 7 is an enlarged circuit diagram provided by the present invention.
The amplifier circuit 12 includes: a voltage input terminal I electrically connected to the sensing electrode 10; a voltage output terminal O electrically connected to the amplification electrode 13; a first end of the transistor 14 is electrically connected with the voltage input end I, a second end of the transistor 14 is electrically connected with the voltage output end O, and a third end of the transistor 14 is grounded; base bias resistor RBBase bias resistor RBIs electrically connected to a first terminal of transistor 14; base power supply UBBBase power supply UBBPositive electrode and base electrode bias resistor RBIs electrically connected with the second terminal of the base power supply UBBThe negative electrode of (2) is grounded; collector resistance RCCollector resistance RCAre electrically connected to the second terminals of the transistors 14, respectively; collector power supply UCCCollector power supply UCCPositive and collector resistance RCIs electrically connected with the second end of the collector power supply UCCThe negative electrode of (2) is grounded.
Fig. 6 is a schematic diagram of only one amplifier circuit 12. Fig. 7 illustrates the principle of the amplifier circuit 12 of the present invention: the collector (i.e., the second terminal of transistor 14) current is controlled by the base (i.e., the first terminal of transistor 14) current, and small variations in the base (i.e., the first terminal of transistor 14) current cause large variations in the collector (i.e., the second terminal of transistor 14) current, and the variations satisfy a certain proportionality: variation of collector (i.e. second terminal of transistor 14) currentThe amount of change is β times of the current change of the base (i.e. the first terminal of the transistor 14), i.e. the current change is amplified by β times, i.e. the amplification of the transistor (β is generally much larger than 1, for example, several tens, several hundreds). The base bias resistor RB first provides a stable base bias current that causes a base current I when the voltage I changesBVariation of (2), base current IBIs amplified, resulting in a collector current ICA fold change occurs. And the collector current ICIs flowing through the collector resistance Rc, the output voltage O at the collector resistance Rc varies greatly according to the voltage calculation formula U-R I. The output voltage O is the amplified voltage signal.
In this embodiment, the transistor 14 is only an NPN transistor, and certainly may also be a PNP transistor, which is not limited herein.
In this embodiment, the amplifying circuit 12 is electrically connected to the sensing electrode 10 and the amplifying electrode 13, and the second voltage on the sensing electrode 10 is amplified by β times and transmitted to the amplifying electrode 13, so that the voltage difference between the amplifying electrode 13 and the opposite electrode 11 can be further increased, which is beneficial to controlling the change of the contact angle of the liquid droplet 8, thereby generating different focusing effects at different positions, thereby realizing the synergistic effect of the display panel 1 and the zoom panel 2, and simultaneously controlling the voltage change of different areas of the zoom panel 2 and the corresponding image display, and realizing the function of the focal length change at different positions of the same image.
In some alternative embodiments, referring to fig. 8 and 9, fig. 8 is a schematic plan view of another display module provided by the present invention, and fig. 9 is a cross-sectional view along direction B-B' in fig. 8.
The display panel 1 comprises a third substrate 15 and a fourth substrate 16 which are oppositely arranged, wherein the third substrate 15 is positioned on one side of the fourth substrate 16 far away from the zoom panel 2;
the display panel 1 further includes a display area AA and a non-display area BB surrounding the display area AA, the non-display area BB includes a driving chip IC, the third substrate 15 further includes a plurality of signal lines 17, one end of each signal line 17 is electrically connected to the first electrode 4, the other end of each signal line 17 is electrically connected to the driving chip IC, and the signal lines 17 are used for transmitting a first voltage or a second voltage to the first electrodes 4.
Of course, when the display panel 1 is a liquid crystal display panel, the third substrate 15 may be an array substrate, and the fourth substrate 16 may be a color film substrate.
In fig. 8, the first electrode 4 in the display panel 1 is not pattern-filled. Fig. 9 only shows the case where the first electrode 4 is located on the third substrate 15, but of course, the third substrate 15 may also be located on the fourth substrate 16, which is not specifically limited herein, and the pattern filling is not performed on the fourth substrate 16.
In this embodiment, the driving chip IC provides the first voltage or the second voltage, and transmits the first voltage to the first electrode 4 through the signal line 17, and transmits the first voltage through the signal line 17 in the display stage, and transmits the second voltage through the signal line 17 in the zoom stage. Namely, the first voltage and the second voltage are both control signals provided by a driving chip IC positioned in the display panel 1, so that the display panel 1 and the zooming panel 2 cooperate to switch between displaying and zooming; in addition, the voltages transmitted by different signal lines 17 are different, and in the zooming stage, the second voltage provided by each signal line 17 can be different, so that focusing effects with different focal lengths can be generated according to different positions in the display module.
In some alternative embodiments, with continued reference to fig. 8 and 9, the third substrate 15 includes a second substrate 18, the first electrode 4 is located on a side of the second substrate 18 close to the fourth substrate 16, the signal line 17 is located on a side of the first electrode 4 close to the second substrate 18, and the signal line 17 is electrically connected to the first electrode 4 through a via.
Fig. 9 does not pattern fill the second substrate 18.
Fig. 9 shows the first electrode 4 on the third substrate 15, and it can be understood that the driving chip IC is located on the third substrate 15, so the first electrode 4 is disposed on the third substrate 15, which facilitates signal transmission, the signal line 17 can be directly electrically connected to the first electrode 4 through a via, no wire is required to be wound in a frame, and the manufacturing process is simpler.
In some alternative embodiments, referring to FIG. 10, FIG. 10 is a further cross-sectional view taken along line B-B' of FIG. 8.
The fourth base plate 16 comprises a third base plate 19, and the first electrode 4 is located on the third base plate 19 side close to the third base plate 15.
In this embodiment, the first electrode 4 is located on the fourth substrate 16, it should be noted that the driving chip IC is also located on the third substrate 15, and the signal line 17 needs to be routed to the fourth substrate 16 in the non-display area BB, specifically, the signal line 17 needs to be routed to the side of the first electrode 4 close to the third substrate 19, and then the signal line 17 is electrically connected to the third substrate 19 by means of the via G.
In this embodiment, the first electrode 4 is disposed on the fourth substrate 16, the first electrode 4 is closer to the sensing electrode 10 in the direction perpendicular to the plane of the first substrate 9, the capacitance structure formed between the first electrode 4 and the sensing electrode 10 is more stable, and when the second voltage is transmitted to the first electrode 4, the voltage of the sensing electrode 10 is more easily changed to be the same as the voltage of the first electrode 4, so that a voltage difference is generated between the sensing electrode 10 and the opposite electrode 11, the contact angle of the liquid droplet is changed, the focal length is changed, and zooming is achieved.
In some alternative embodiments, referring to FIG. 11, FIG. 11 is a further cross-sectional view taken along line B-B' of FIG. 8.
The fourth substrate 16 includes a third substrate 19, the first substrate 9 is reused as the third substrate 19, and the sensing electrode 10 is located on a side of the third substrate 19 away from the third substrate 15.
In the manufacturing process, the first substrate 9 may be reused as the third substrate 19 by first forming a corresponding film layer (not filled with a pattern in the figure) for display on the third substrate 19 to obtain the fourth substrate 16, then facing the fourth substrate 16 to the third substrate 15 to obtain the display panel 1, and then forming the sensing electrode 10 on the side of the third substrate 19 away from the third substrate.
In this embodiment, the first substrate 9 is reused as the third substrate 19, which is beneficial to reducing the thickness of the display module, and on the other hand, the distance between the first electrode 4 and the sensing electrode 10 can be reduced, the capacitance structure formed between the first electrode 4 and the sensing electrode 10 is more stable, and when the second voltage is transmitted to the first electrode 4, the voltage of the sensing electrode 10 is more easily changed to be the same as the voltage of the first electrode 4, so that a voltage difference is generated between the sensing electrode 10 and the opposite electrode 11, the contact angle of the liquid drop is changed, the focal length is changed, and zooming is achieved.
In some alternative embodiments, with continued reference to fig. 2 to 4, the sensing electrode 10 is formed on the side of the first substrate 9 close to the second substrate 6 by a micro-nano process.
Specifically, the induction electrode 10 is formed on one side of the first substrate 9 close to the second substrate 6 through a micro-nano etching process, certainly, the forming process of the amplifying circuit or the opposite electrode can also be the micro-nano etching process, the etching process comprises a dry etching process and a wet etching process, and the micro-nano etching process is mature and has better flexibility.
In some alternative embodiments, referring to FIG. 12, FIG. 12 is a further cross-sectional view taken along line A-A' of FIG. 1.
In fig. 12, the first substrate 5 further includes a first hydrophobic layer 20, the second substrate 6 further includes a second hydrophobic layer 21, the first hydrophobic layer 20 is located on one side of the sensing electrode 10 close to the dielectric layer 7, and the second hydrophobic layer 21 is located on one side of the dielectric layer 7 far from the first substrate 5.
It should be noted that the dielectric layer 7 is filled with air except for the droplet 8, so that the droplet 8 can change the contact angle when it is subjected to the voltage difference between the sensing electrode 10 and the counter electrode 11.
Alternatively, the material of the first water-repellent layer 20 and the second water-repellent layer 21 may be an inorganic material such as silicon nitride, or an organic material such as a polysilazane or a polypropylene. The dielectric layer 7 is not filled with (air medium) or a non-conductive medium such as silicone oil is used to stabilize the droplets 8.
The surface tension between the first water-repellent layer 20 and the second water-repellent layer 21 and the liquid drop 8 determines whether the zooming effect is achieved, when a voltage difference exists between the sensing electrode 10 and the opposite electrode 11, the tension between the micro-liquid drop 10 and the water-repellent layer 9 changes, the contact angle of the liquid can be controlled to change through pressurization, and therefore the surface property of the liquid drop changes accordingly, namely the wetting effect of the micro-liquid drop 10 is changed, and the zooming effect is achieved.
In some alternative embodiments, with continued reference to fig. 2-4, the refractive index of droplet 8 is greater than 1.
It can be understood that, in the present invention, to implement zooming, the light emitted from the display panel 1 needs to be refracted after passing through the liquid droplets 8, so that the light can be refracted only when the refractive index of the liquid droplets 8 is greater than 1, thereby implementing zooming effect.
In some alternative embodiments, with reference to FIG. 13 and with continuing reference to FIG. 10, FIG. 13 is a further cross-sectional view taken along line A-A' of FIG. 1.
In fig. 13, the display panel 1 is a liquid crystal display panel, and in fig. 10, the display panel is an organic self-luminous display panel 1.
Fig. 13 shows that the display panel 1 includes a third substrate 15 and a fourth substrate 16, where the third substrate 15 may be an array substrate, the fourth substrate 16 may be a color filter substrate, a liquid crystal is sandwiched between the third substrate 15 and the fourth substrate 16, the first electrode 4 may be a common electrode, and a driving circuit and a pixel electrode are not shown in fig. 13, and certainly, a voltage difference between the pixel electrode and the common electrode drives the liquid crystal to deflect, so as to perform display. Certainly, when the display panel 1 is a liquid crystal display panel, the display module further includes a backlight module (not shown in the figure), and the backlight module is located on one side of the display panel 1 away from the light exit surface and provides a backlight source for the display panel 1.
The display panel 1 in fig. 10 may be an organic self-luminous display panel, and of course, the organic self-luminous display panel further includes a driving circuit layer, a light-emitting function layer, and an encapsulation layer (not shown) stacked on the second substrate 18 in sequence, and the fourth substrate 16 includes a glass cover plate (i.e., the third substrate 19 in fig. 10), and the first electrode 4 is disposed on a side of the glass cover plate (the third substrate 19) close to the third substrate 15, so that a distance between the first electrode 4 and the sensing electrode 10 can be reduced, and a capacitance structure formed between the first electrode 4 and the sensing electrode 10 is more stable.
The display module 100 of the present invention may be a liquid crystal display panel, or an organic self-luminous display panel, and the zoom panel 2 is adaptable to different types of display panels, and has a wider applicability.
In some optional embodiments, with continued reference to fig. 8, the display panel 1 further comprises a touch phase, in which a third voltage is transmitted to the first electrode 4.
It can be understood that the display panel 1 may also have a touch function, and the signal lines 17 may be multiplexed as touch traces, and of course, the touch stage, the display stage, and the zoom stage are all driven in a time-sharing manner.
In the touch stage, the third voltage is transmitted to the first electrode 4, and it should be noted that, at this time, the third voltage also needs to be transmitted in the opposite electrode 11, so that when the voltage on the first electrode 4 is the third voltage, the voltage of the sensing electrode 10 is also equal to the third voltage, and at this time, the voltage difference between the sensing electrode 10 and the opposite electrode 11 is 0, so that it can be ensured that the zooming situation does not occur in the touch stage.
The first electrode 4 in the invention is reused as a touch electrode, has the functions of displaying and zooming, and also has the touch function, so that the application range is wider.
The present invention further provides a display device 200 including the display module 100 according to any of the above embodiments of the present invention. Fig. 14 is a schematic view of a display device according to the present invention, and referring to fig. 14, a display device 200 includes the display module 100 according to any of the embodiments of the present invention. The embodiment of fig. 14 only illustrates the display device 200 by taking an in-vehicle display device as an example, but it is needless to say that the display device 200 provided in the embodiment of the present invention may be other display devices having a display function, such as a computer, a television, a mobile phone, and the like, and the present invention is not limited thereto. The display device 200 provided in the embodiment of the present invention has the zooming beneficial effect of the display module 100 provided in the embodiment of the present invention, and specific reference is specifically made to the specific description of the display device in the foregoing embodiments, and the detailed description of the embodiment is not repeated herein.
According to the embodiment, the display module and the display device provided by the invention at least realize the following beneficial effects:
the display module comprises a display panel and a zooming panel which are oppositely arranged, wherein the zooming panel is positioned on one side of the display panel close to a light-emitting surface and is used for zooming the display panel; the zoom panel comprises a first substrate, a second substrate and a medium layer, wherein the first substrate and the second substrate are arranged oppositely, the medium layer is clamped between the first substrate and the second substrate and comprises liquid drops, the first substrate is positioned on one side, far away from the light-emitting surface, of the second substrate, the first substrate comprises a first substrate base plate, one side, close to the second substrate, of the first substrate base plate comprises a plurality of induction electrodes, and the second substrate comprises an opposite electrode; in the direction perpendicular to the plane of the first substrate base plate, the induction electrode is at least partially overlapped with the first electrode; the display module comprises a display stage and a zooming stage, wherein in the display stage, a first voltage is transmitted to the first electrode, no voltage difference exists between the induction electrode and the opposite electrode, the contact angle of the liquid drop is 0 degrees, the light emitted by the display panel cannot be refracted when passing through the liquid drop of the zooming panel, so that the light emitting route cannot be changed, and the zooming panel has no focusing effect on the display panel; in the zooming stage, a second voltage is transmitted to the first electrode, the induction electrode and the first electrode form a capacitance structure, when the voltage of the first electrode changes, the voltage value of the induction electrode also changes to the second voltage, at the moment, a voltage difference exists between the induction electrode and the opposite electrode, the contact angle of the liquid drop is larger than 0 degree, when the light-emitting of the display panel passes through the liquid drop of the zooming panel, the light can be refracted, the focal length of the light-emitting changes, the zooming panel focuses on the light-emitting of the display panel, and when the voltage values of the second voltage are different, the voltage difference between the induction electrode and the opposite electrode is also different, the contact angle of the liquid drop is also different, so that the focal length is changed. According to the invention, the capacitance structure is formed by the first electrode in the display panel and the induction electrode in the zooming panel, so that the induction electrode generates the voltage equal to the first electrode, the voltage difference is generated between the induction electrode and the opposite electrode in the zooming panel, the focal length of the display module is changed, and the display module has the zooming function.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (13)

1. A display module is characterized by comprising a display panel and a zooming panel which are oppositely arranged, wherein the zooming panel is positioned on one side of the display panel close to a light-emitting surface;
the display panel includes a first electrode layer including a plurality of first electrodes;
the zoom panel comprises a first substrate and a second substrate which are arranged oppositely, and a medium layer clamped between the first substrate and the second substrate, wherein the medium layer comprises liquid drops, the first substrate is positioned on one side, far away from the light emergent surface, of the second substrate, the first substrate comprises a first substrate, one side, close to the second substrate, of the first substrate comprises a plurality of induction electrodes, and the second substrate comprises opposite electrodes;
in the direction perpendicular to the plane of the first substrate base plate, the sensing electrode is at least partially overlapped with the first electrode;
the display module comprises a display stage and a zooming stage, wherein in the display stage, a first voltage is transmitted to the first electrode, no voltage difference exists between the induction electrode and the opposite electrode, and the contact angle of the liquid drop is 0 degree; and in a zooming stage, transmitting a second voltage to the first electrode, wherein the sensing electrode and the first electrode form a capacitance structure, a voltage difference is formed between the sensing electrode and the opposite electrode, and the contact angle of the liquid drop is larger than 0 degrees.
2. The display module according to claim 1, wherein a side of the sensing electrode away from the first substrate comprises an amplifying circuit, the amplifying circuit is electrically connected with the sensing electrode, a side of the amplifying circuit away from the first substrate comprises an amplifying electrode, and the amplifying electrode is electrically connected with the amplifying circuit;
the amplifying electrode and the counter electrode at least partially overlap in a direction perpendicular to a plane of the first substrate base plate;
the amplifying circuit amplifies the second voltage of the induction electrode into a third voltage and transmits the third voltage to the amplifying electrode, and the contact angle of the liquid drop is changed by the voltage difference between the amplifying electrode and the opposite electrode.
3. The display module of claim 2, wherein the amplifying circuit comprises:
a voltage input terminal electrically connected to the sensing electrode;
a voltage output end electrically connected with the amplifying electrode;
the first end of the triode is electrically connected with the voltage input end, the second end of the triode is electrically connected with the voltage output end, and the third end of the triode is grounded;
the first end of the base electrode biasing resistor is electrically connected with the first end of the triode;
the anode of the base power supply is electrically connected with the second end of the base bias resistor, and the cathode of the base power supply is grounded;
the first end of the collector resistor is electrically connected with the second end of the triode respectively;
and the anode of the collector power supply is electrically connected with the second end of the collector resistor, and the cathode of the collector power supply is grounded.
4. The display module of claim 1, wherein the display panel comprises a third substrate and a fourth substrate disposed opposite to each other, and the third substrate is located on a side of the fourth substrate away from the zoom panel;
the display panel further comprises a display area and a non-display area surrounding the display area, the non-display area comprises a driving chip, the third substrate further comprises a plurality of signal lines, one end of each signal line is electrically connected with the first electrode, the other end of each signal line is electrically connected with the driving chip, and the signal lines are used for transmitting the first voltage or the second voltage to the first electrodes.
5. The display module of claim 4, wherein the third substrate comprises a second substrate, the first electrode is disposed on a side of the second substrate adjacent to the fourth substrate, the signal line is disposed on a side of the first electrode adjacent to the second substrate, and the signal line and the first electrode are electrically connected through a via.
6. The display module of claim 4, wherein the fourth substrate comprises a third substrate, and the first electrode is disposed on a side of the third substrate adjacent to the third substrate.
7. The display module of claim 4, wherein the fourth substrate comprises a third substrate, the first substrate is reused as the third substrate, and the sensing electrode is located on a side of the third substrate away from the third substrate.
8. The display module of claim 1, wherein the sensing electrode is formed on one side of the first substrate close to the second substrate by a micro-nano process.
9. The display module according to claim 1, wherein the first substrate further comprises a first hydrophobic layer, the second substrate further comprises a second hydrophobic layer, the first hydrophobic layer is located on one side of the sensing electrode close to the dielectric layer, and the second hydrophobic layer is located on one side of the dielectric layer far from the first substrate.
10. The display module of claim 1, wherein the droplets have a refractive index greater than 1.
11. The display module as claimed in claim 1, wherein the display panel is a liquid crystal display panel or an organic self-emissive display panel.
12. The display module of claim 1, wherein the display panel further comprises a touch stage, and a third voltage is transmitted to the first electrode during the touch stage.
13. A display device, comprising the display module of any one of claims 1 to 12.
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