CN112037676A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN112037676A CN112037676A CN202011016713.9A CN202011016713A CN112037676A CN 112037676 A CN112037676 A CN 112037676A CN 202011016713 A CN202011016713 A CN 202011016713A CN 112037676 A CN112037676 A CN 112037676A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- 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
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- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
Abstract
The application discloses a display panel, a display device and an electronic device. A display panel comprises a driving back plate, a pixel defining layer, an electroluminescent device layer, a supporting layer and a wave modulation layer which are sequentially stacked, wherein the luminescent device layer comprises a plurality of sub-pixels which are arranged in a matrix; the wave modulation layer comprises a plurality of wavelength adjusting pieces, the wavelength adjusting pieces correspond to the sub-pixels one to one, and the wavelength adjusting pieces are used for changing the light emitting wavelengths of the sub-pixels. According to the display panel, the wave modulation layer is arranged on the supporting layer, so that each wavelength adjusting piece of the wave modulation layer corresponds to each sub-pixel of the light emitting device layer, the wavelength adjusting piece adjusts the light emitting wavelength of the sub-pixel, namely a micro/mini LED, and the stress accumulation of the sub-pixel, namely the micro/mini LED, caused by epitaxy is further compensated; therefore, the problems that the wavelength of the existing Micro LED/Mini LED display device is not uniform, the uniformity of displayed chromaticity is not good, even chromaticity drift is easy to cause and the like are effectively solved.
Description
Technical Field
The application relates to the technical field of display devices, in particular to a display panel and a display device.
Background
Micro LED/Mini LED (Micro LED) technology, i.e. LED scaling and matrixing technology; the LED display screen is characterized in that a high-density micro-sized LED array is integrated on a chip, if each pixel of the LED display screen can be addressed and independently driven to be lightened, the LED display screen can be regarded as a miniature version of an outdoor LED display screen, and the distance between pixel points is reduced from a millimeter level to a micron level.
The epitaxy is an important part of a Micro LED/Mini LED display in the manufacturing process, and the stress accumulation of a light emitting layer is more and more caused by the one-by-one preparation of multilayer structures in the epitaxy process, so that the wavelength of the emergent light is not uniform in actual display, and the problem of poor chromaticity uniformity and even chromaticity drift is caused.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, and aims to solve the problems that the existing Micro LED/Mini LED display is uneven in light emitting wavelength, poor in chromaticity uniformity and even chromaticity drift is easily caused, and the like.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
the present application provides, in a first aspect, a display panel, which includes a driving backplane, a pixel defining layer, a light emitting device layer, a supporting layer, and a wave modulating layer, which are sequentially stacked, where the light emitting device layer includes a plurality of sub-pixels arranged in a matrix;
the wave modulation layer comprises a plurality of wavelength adjusting pieces, the wavelength adjusting pieces correspond to the sub-pixels one to one, and the wavelength adjusting pieces are used for changing the light emitting wavelengths of the sub-pixels.
In some modified embodiments of the first aspect of the present application, in the display panel, the wavelength adjusting member includes a deformation layer, a first electrode layer, and a second electrode layer;
the deformation layer is arranged on one side of the supporting layer, which is far away from the driving back plate;
the first electrode layer and the second electrode layer are electrically connected to a driving power supply of the display panel;
the deformation layer deforms in response to the voltage difference between the first electrode layer and the second electrode layer so as to compensate for the internal stress of the sub-pixels and adjust the light-emitting wavelength of the sub-pixels.
In some modified embodiments of the first aspect of the present application, in the display panel, the first electrode layer and the second electrode layer are disposed on the same layer on a side of the deformation layer facing away from the driving backplane; or
The first electrode layer and the second electrode layer are arranged on the same layer on one side of the deformation layer facing the driving back plate.
In some modified embodiments of the first aspect of the present application, in the display panel, the first electrode layer includes a plurality of first electrode lines arranged side by side and at intervals along a first direction;
the second electrode layer comprises a plurality of second electrode wires which are arranged side by side along the first direction at intervals;
the plurality of first electrode wires and the plurality of second electrode wires are alternately arranged along the first direction;
the first direction is the length direction of the driving backboard, or the width direction of the driving backboard, or a direction forming a preset included angle with the length/width direction of the TTF substrate.
In some modified embodiments of the first aspect of the present application, the display panel further includes a first connection line and a second connection line;
the first connecting line and the second connecting line are arranged along the first direction and are arranged oppositely;
the first connecting lines are connected to the first ends of the first electrode wires at the same time, and the second connecting lines are connected to the ends, far away from the first ends of the first electrode wires, of the second electrode wires at the same time.
In some modified embodiments of the first aspect of the present application, in the display panel, a width of the first electrode lines and the second electrode lines along the first direction is 1 to 10 micrometers;
the distance between the adjacent first electrode lines and the adjacent second electrode lines in the first direction is 1-40 micrometers.
In some modified embodiments of the first aspect of the present application, in the display panel, the first electrode layer and the second electrode layer are polarized electrode layers, and polarization directions of the first electrode layer and the second electrode layer are opposite to each other.
In some modified embodiments of the first aspect of the present application, in the display panel, the deformation layer is a piezoelectric material.
In some variations of the first aspect of the present application, in the display panel, an orthographic projection of the wavelength tuning member toward the driving backplane is smaller than an orthographic projection of the sub-pixels toward the driving backplane.
In some modified embodiments of the first aspect of the present application, the display panel further includes a reinforcing layer;
the strengthening layer is arranged between the supporting layer and the wavelength adjusting piece and used for improving the wavelength adjusting function of the wavelength adjusting piece.
A second aspect of the present application provides a display device including the above display panel.
Compared with the prior art, according to the display panel provided by the first aspect of the application, the wave modulation layer is arranged on the supporting layer, so that each wavelength adjusting piece of the wave modulation layer corresponds to each sub-pixel of the light emitting device layer, the wavelength adjusting piece adjusts the light emitting wavelength of the sub-pixel, namely, the micro/mini LED, and the stress accumulation of the sub-pixel, namely, the micro/mini LED, caused by epitaxy is further compensated; therefore, the problems that the existing Micro LED/Mini LED display device is uneven in wavelength, poor in uniformity of displayed chromaticity and even chromaticity drift are easily caused are effectively solved; the application provides a display panel sets up the wave layer of transferring outside the supporting layer, and the light-emitting wavelength of adjustment display panel guarantees light-emitting wavelength homogeneity, guarantees to show the colourity.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
fig. 1 schematically illustrates a structural diagram of a display panel provided in an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a structure of a wavelength adjustment member in a display panel according to an embodiment of the present disclosure;
FIG. 3 schematically illustrates a strain versus wavelength diagram;
fig. 4 schematically illustrates a flow chart of a manufacturing method of a display panel provided in an embodiment of the present application;
the reference numbers illustrate: the backlight module comprises a driving back plate 1, a light emitting device layer 2, sub-pixels 21, a support layer 3, a wave modulation layer 4, a wavelength adjusting member 41, a focusing layer 311, a first electrode layer 412, a first electrode line 4121, a first connecting line 4122, a deformation layer 313, a second electrode layer 413, a second electrode line 4131 and a second connecting line 4132.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
example 1
Referring to fig. 1, a display panel provided in this embodiment of the present application includes a driving backplane 1, a pixel defining layer, a light emitting device layer 2, a supporting layer 3, and a wave modulating layer 4, which are sequentially stacked, where the light emitting device layer 2 includes a plurality of sub-pixels 21 arranged in a matrix;
the wavelength modulation layer 4 comprises a plurality of wavelength adjusting pieces 41, the wavelength adjusting pieces 41 correspond to the sub-pixels 21 one by one, and the wavelength adjusting pieces 41 are used for changing the light-emitting wavelength of the sub-pixels 21.
Specifically, in order to solve the problems of uneven light emitting wavelength, poor uniformity of display chromaticity, even chromaticity drift, and the like of the existing Micro LED/Mini LED display device, the wavelength modulation layer 4 is arranged on the upper side of the supporting layer 3, so that the light emitting wavelength of the sub-pixels 21 can be adjusted through the wavelength modulation layer 4 in the debugging process of the display before leaving the factory, and the purposes of uniform light emitting wavelength and uniform display chromaticity are achieved.
The driving backplane 1 is a structure including a source drain layer, an electrode layer and other related functional layers, and the structure of the driving backplane 1 can be easily understood by those skilled in the art with reference to the prior art, and is used for driving and displaying sub-pixels in a Micro LED/Mini LED display panel, so that the description is omitted here.
The pixel defining layer (not shown in the figure) is used to divide the display panel into a plurality of sub-display regions, and the light emitting device layer 2 in fig. 1 can be understood as including the pixel defining layer, and the above structure can be easily understood by those skilled in the art with reference to the prior art, wherein specifically, the light emitting device layer 2 is formed by arranging a plurality of sub-pixels 21 in a matrix form on the driving backplane 1, one sub-pixel 21 corresponds to one micro/mini LED chip, and the structure can be easily understood and implemented by those skilled in the art, and will not be described herein; in addition, in the technical scheme of the application, the light emitting device layer 2 is an inorganic light emitting device layer, that is, a display panel formed by a plurality of Micro/Mini LED chips is a Micro LED/Mini LED display panel, and the following contents in this embodiment are all set as an inorganic light emitting device layer for the Micro LED/Mini LED display panel, that is, a plurality of Micro/Mini LED chips are arranged in a matrix form; the above-mentioned contents can be easily understood by those skilled in the art, and will not be described in too much detail herein.
The supporting layer 3 is made of sapphire, the sapphire is of a single crystal structure, the intensity is high, the supporting layer can support the light-emitting device layer 2, and the intensity of the light-emitting device layer 2 is maintained; the thickness of the sapphire support layer 3 is 30-200 microns.
The wave modulation layer 4 is arranged on one side of the support layer 3 departing from the driving backplane 1, and the wavelength adjusting member 41 in the wave modulation layer 4 can change the light-emitting wavelength of the sub-pixel 21 corresponding to the wave modulation layer, so as to adjust the display chromaticity of the whole display panel; specifically, the wavelength adjusting member 41 may be electrically driven to deform to compensate for strain energy in the sub-pixel 21, so as to adjust the wavelength of the light emitted from the sub-pixel 21, thereby ensuring uniformity.
According to the above list, in the display panel provided by the first aspect of the present application, the wavelength modulation layer 4 is disposed on the support layer 3, so that each wavelength modulation member 41 of the wavelength modulation layer 4 corresponds to each sub-pixel 21 of the light emitting device layer 2, and the wavelength modulation member 41 adjusts the light emitting wavelength of the sub-pixel 21, that is, the micro/mini LED, so as to further compensate the stress accumulation of the sub-pixel 21, that is, the micro/mini LED, due to epitaxy; therefore, the problems that the existing Micro LED/Mini LED display device is uneven in wavelength, poor in uniformity of displayed chromaticity and even chromaticity drift are easily caused are effectively solved; the application provides a display panel sets up wave regulation layer 4 outside supporting layer 3, adjusts display panel's light-emitting wavelength, guarantees light-emitting wavelength homogeneity, guarantees to show the colourity.
The term "and/or" herein is merely an associative relationship describing an associated object, meaning that three relationships may exist, e.g., a and/or B, specifically understood as: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.
Further, referring to fig. 1 and fig. 2, in a display panel provided in an embodiment of the present application, in a specific implementation, the first wave modulating layer 41 includes a deformation layer 411, a first electrode layer 412, and a second electrode layer 413;
the deformation layer is arranged on one side of the supporting layer 3, which is far away from the driving back plate 1;
the first electrode layer 412 and the first electrode layer 413 are electrically connected to a driving power supply of the display panel;
the deformation layer 411 deforms in response to a voltage difference between the first electrode layer 412 and the first electrode layer 413, so as to compensate for an internal stress of the sub-pixel 21 and adjust an outgoing light wavelength of the sub-pixel 21.
Specifically, in order to realize the adjustment of the wavelength adjusting member 41 on the light-emitting wavelength of the sub-pixel 21, in this embodiment, the deformation layer 411 is deformed by the electric driving of the first electrode layer 412 and the first electrode layer 413, so as to compensate the strain energy accumulated in the sub-pixel 21 in the epitaxial process, and further adjust the light-emitting wavelength of the sub-pixel; referring to fig. 3, four curves from bottom to top, when the strain energy (i.e. abscissa) is increased, the wavelength (i.e. ordinate) corresponding to each curve is decreased, and conversely, when the strain energy is decreased, the wavelength corresponding to each curve is increased; therefore, in this embodiment, before the display panel is shipped, the display panel needs to be tested, when the strain in the sub-pixels 21 is large, the stress direction represents tension, and the emitted light is a long wavelength, the wavelength adjustment member 41 needs to generate a compressive force to compensate the stress with the short wavelength, so as to ensure that the light emitting wavelengths of all the sub-pixels 21 are the same during final display.
The deformation layer 411 is a structure mainly deformed in the wavelength adjusting member 4, and is disposed on a side of the sapphire support layer 3 away from the driving backplate 1, and is deformed to generate a tensile stress or a compressive force for compensating original strain energy in the sub-pixels 21, so as to adjust the light emitting wavelength, in this embodiment, the deformation layer 411 is preferably configured as a transparent PZT (lead zirconate titanate piezoelectric material) which can be better grown by the sapphire support layer 3; the deformation layer 3 applies different voltages to the first electrode layer 412 and the first electrode layer 413, so that the deformation layer 411 of the piezoelectric material is deformed under the action of the voltage, and generates tensile stress or compressive force. The first electrode layer 412 and the first electrode layer 413 are provided in the following two ways:
the first method comprises the following steps: referring to fig. 1 and fig. 2, the first electrode layer 412 and the second electrode layer 413 are disposed on the same layer on the side of the deformation layer 411 facing away from the driving back plate 1; second (not shown): the first electrode layer 412 and the second electrode layer 413 are arranged on the same layer on the side of the deformation layer 411 facing the driving back plate 1; at this time, different voltages are applied to the first electrode layer 412 and the second electrode layer 413 respectively to generate a voltage difference, so that the deformation layer 411 can be deformed to generate a tensile stress or a compressive force; the first electrode layer 413 and the second electrode layer 413 may be made of transparent ITO (indium tin oxide), which can ensure the display effect of the display panel and realize voltage driving; the first electrode layer 413 and the second electrode layer 413 may also be nickel (Ni)/gold (Au) or gold (Au)/(Ni).
Further, referring to fig. 2, in a display panel provided in this embodiment of the present application, in a specific implementation, the first electrode layer 412 includes a plurality of first electrode lines 4121 arranged side by side and at intervals along a first direction; the second electrode layer 413 comprises a plurality of second electrode lines 4131 arranged side by side along the first direction at intervals; the plurality of first electrode lines 4121 and the plurality of second electrode lines 4131 are alternately arranged along the first direction; the first direction is a length direction of the driving backboard 1, or a width direction of the driving backboard 1, or a direction forming a preset included angle with the length/width direction of the TTF substrate 1.
Specifically, in order to realize that the deformation layer 411 can be driven to deform when the first electrode layer 412 and the first electrode layer 413 are disposed on the same layer, in this embodiment, the first electrode layer 412 and the second electrode layer 413 are disposed as a plurality of first electrode lines 4121 and second electrode lines 4131 which are alternately disposed;
the first direction is the length direction of the driving backboard 1, or the width direction of the driving backboard 1, or a direction forming a preset included angle with the length/width direction of the TTF substrate 1; for example: referring to fig. 2, when the driving backplate 1 is rectangular, the first electrode lines 4121 and the second electrode lines 4131 are simultaneously disposed on the side of the deformation layer 411(PZT) facing away from the supporting layer 3, and are alternately and alternately disposed along the length direction of the driving backplate 1, i.e. the up-down direction in the figure, then, in the debugging process before shipping, the strain energy of the sub-pixels 21 in the display panel needs to be tested, if the stress direction existing in a certain sub-pixel 21 is tensile stress, then the display panel emits long wavelength after emitting light, therefore, the debugging process needs to apply a driving voltage to the first electrode lines 4121 and the second electrode lines 4131 in the wavelength tuning element 411 corresponding to the sub-pixel 21 so as to drive the deformation layer 411 to generate a compressive force, the original long wavelength is compensated by the short wavelength, so that the light emitting wavelength of the light emitting diode is consistent with the light emitting wavelength of other sub-pixels; correspondingly, when the stress direction existing in a certain sub-pixel 21 is a compressive force, the driving manner is opposite to the above, and will not be described in detail herein.
It should be noted that: when the shape of the driving back plate 1 changes, the arrangement directions of the first electrode wires 4121 and the second electrode wires 4131 can be adjusted, as long as the first electrode wires 4121 and the second electrode wires 4131 are arranged alternately and at intervals; for example: when the driving back plate 1 is circular, the first electrode wires 4121 and the second electrode wires 4131 are alternately arranged in concentric circles at intervals; wherein the distance between the adjacent first electrode lines 4121 and second electrode lines 4131 is 1-40 micrometers, and the width of the first electrode lines 4121 and second electrode lines 4131 is 1-10 micrometers; in this arrangement, the first electrode lines 4131 and the second electrode lines 4131 may be made of the above-mentioned metals, and thus the first electrode lines 4131 and the second electrode lines 4131 are spaced apart from each other, and the spacers may transmit light, so that the light emission display of the display panel is not affected.
The thickness of the deformation layer 313 is 2-20 micrometers, the thickness of the first electrode layer 412 and the first electrode layer 413 is 40-300 nanometers, and the thickness of the focusing layer 311 is 1-5 micrometers.
Further, referring to fig. 2, in an implementation, the display panel provided in the embodiment of the present application further includes first connection lines 4122 and second connection lines 4132;
the first connecting line 4122 and the second connecting line 4132 are both arranged along the first direction and are arranged oppositely;
the first connecting lines 4122 are simultaneously connected to the first ends of the first electrode lines 4121, and the second connecting lines 4132 are simultaneously connected to the ends of the second electrode lines 4131 far away from the first ends of the first electrode lines 4121.
Specifically, in order to realize that the plurality of first electrode lines 4121 are applied with the same driving voltage at the same time and the plurality of second electrode lines 4131 are applied with the same driving voltage at the same time, in this embodiment, the first connecting line 4122 and the second connecting line 4132 are provided, and are made of a material which is respectively communicated with the first electrode lines 4121 and the second electrode lines 4131, and the arrangement of the first connecting line 4122 and the second connecting line 4132 enables the plurality of first electrode lines 4121 to be communicated with each other and the plurality of second electrode lines 4132 to be communicated with each other, so that the same driving voltage can be applied to the plurality of electrode lines at the same time when the driving voltage is applied, and the simultaneity and convenience are realized; of course, it is understood that: the obtained first electrode lines 4121 and the second electrode lines 4131 may be respectively and simultaneously connected to a driving power source, so as to obtain driving voltages respectively, which can be easily understood and implemented by those skilled in the art, and will not be described herein in detail.
Further, referring to fig. 2, in a specific implementation of the display panel provided in the embodiment of the present application, the first electrode layer 412 and the second electrode layer 413 are polarized electrode layers, and polarization directions of the first electrode layer 412 and the second electrode layer 413 are opposite.
Specifically, in order to achieve the purpose that the energy consumption is reduced on the premise that the deformation layer 4 is electrically driven to adjust the light-emitting wavelength of the sub-pixel 21, in this embodiment, the first electrode layer 412 and the second electrode layer 413 are polarized to obtain a polarized electrode, and then the driving voltage can be reduced when the sub-pixel 21 is subjected to stress compensation, so that the energy consumption is reduced; referring to fig. 2, when a positive voltage and a zero voltage are applied to the first electrode layer 412 and the first electrode layer 413 during polarization respectively, when the actual driving voltage differential direction of the first electrode layer 412 and the second electrode layer 413 is the same as the actual driving voltage differential direction, the deformation layer 411(PZT) is concave and deformed, i.e. a vertical screen is inward in the figure, and a tensile stress is generated; when the actual driving voltage difference direction of the first electrode layer 412 and the second electrode layer 413 is opposite to that of the first electrode layer, the deformation layer 411(PZT) is in a convex shape opposite to the above direction, that is, a compressive force is generated outwards from a vertical screen in the figure; another example is: when the driving backplate 1 is rectangular, the driving backplate 1 and the driving backplate 1 are alternately arranged at intervals along a direction forming an angle of 45 degrees with the length direction of the driving backplate 1, and when a positive voltage and a zero voltage are respectively applied in the polarization processes of the first electrode layer 412 and the second electrode layer 413, the deformation layer 411(PZT) is concave and deformed when the actual driving voltage differential direction of the first electrode layer 412 and the first electrode layer 413 is the same as the direction of the actual driving voltage differential direction, so that tensile stress is generated; when the actual driving voltage difference direction between the first electrode layer 412 and the second electrode layer 413 is opposite to that, the deformation layer 411(PZT) is deformed to be convex in the opposite direction, thereby generating a compressive force.
Further, referring to fig. 1, in a specific implementation of a display panel provided in the embodiment of the present application, an orthographic projection of the wavelength adjustment member 4 toward the driving backplane 1 is smaller than an orthographic projection of the sub-pixel 21 toward the driving backplane 1.
Specifically, in order to ensure that the wavelength adjusting element 4 can completely act on the Micro LED chip after being deformed and avoid generating additional strain energy, in this embodiment, the wavelength adjusting element 41 is set to be smaller than the sub-pixel 21, because the sub-pixel 21 is larger than the Micro LED chip in the actual display panel manufacturing, in this embodiment, the orthographic projection of the wavelength adjusting element 41 toward the driving backplane 1 is set to cover at most the orthographic projection of the Micro LED chip toward the driving backplane 1; referring to fig. 1, only when the orthographic projection area of the wavelength adjusting member 41 facing the driving backplane 1 is less than or equal to the orthographic projection area of the Micro LED chip facing the driving backplane 1, the strain energy generated when the deformation layer 411(PZT) in the wavelength adjusting member 41 deforms can be fully compensated into the sub-pixel 21, so that the strain energy generated by the deformation layer 411(PZT) is not caused to be used for compensating the strain energy of the sub-pixel 21 and then extra residual exists, thereby affecting the light-emitting wavelength of the sub-pixel 21.
Further, referring to fig. 1, in a specific implementation of the display panel provided in the embodiment of the present application, the display panel further includes a strengthening layer 5, where the strengthening layer 5 is disposed between the supporting layer 3 and the wavelength adjustor 41, and is used to improve a wavelength adjusting function of the wavelength adjustor 41.
Specifically, in order to enhance the piezoelectric property of the deformation layer 411(PZT) in the wavelength adjuster 41 to improve the chromaticity uniformity adjustability of the display panel, in this embodiment, the strengthening layer 5 is disposed in the display panel, the strengthening layer 5 is preferably made of platinum (Pt), the strengthening layer 5 (platinum) is disposed on the sapphire support layer 3, and then the wave adjusting layer 4, that is, the wavelength adjuster 41, is disposed on a side of the strengthening layer 5 (platinum) away from the sapphire support layer 3, so as to improve the quality of the deformation layer 411(PZT), and further ensure the piezoelectric property of the deformation layer 411 (PZT).
Further, referring to fig. 4, for a case that the first electrode layer 312 and the second electrode layer 314 are disposed on the same layer on a side of the deformation layer 411 facing away from the driving back plate 1, a method for manufacturing a display panel according to an embodiment of the present disclosure is as follows:
101. preparing a driving back plate 1, a light-emitting device layer 2 and a supporting layer 3;
preparing the driving backplane 1, the light emitting device layer 2, and the support layer 3 according to a preparation method well known to those skilled in the art; specifically, the light emitting device layer 2 is prepared on the driving backplane 1, and a process manner known by those skilled in the art, such as bulk transfer, wafer bonding, or flip chip bonding, may be used in this process, which is not described herein in detail; and preparing a sapphire supporting layer 3 on one side of the light-emitting device layer 2, which is far away from the driving back plate 1, and mechanically thinning the sapphire supporting layer 3 to a thickness of 30-200 microns.
Then preparing a wave modulation layer 4 on one side of the supporting layer 3 departing from the driving back plate 1;
102. preparing a deformation layer 411 (PZT);
specifically, spin-coating the precursor solution of the deformation layer 411(PZT) on the sapphire support layer 3 at 6000rpm, and performing annealing at >550 ℃ for 2min to form microcrystals and sinter, so that the deformation layer 313(PZT) generates a lattice effect (piezoelectric effect) after annealing and has a specific crystal orientation and piezoelectric characteristics; then, the positions of the sub-pixels 21 are patterned by photolithography, and the entire surface of the deformation layer 411(PZT) is divided into island-like shapes corresponding to the sub-pixels 21 one by one.
103. Preparing a first electrode layer 412 and a second electrode layer 413;
depositing the first electrode layer 412(ITO/Ti/Au) and the second electrode layer 413(ITO/Au/Ti) on the side of the deformation layer 411(PZT) facing away from the sapphire support layer 3; it can be understood that: in this embodiment, the deformation layer 411 has a plurality of deformation layers corresponding to the plurality of sub-pixels 21, so that the first electrode layer 412(ITO/Ti/Au) and the second electrode layer 413(ITO/Au/Ti) need to be patterned, and a plurality of relatively independent first electrode layers 412(ITO/Ti/Au) can be formed corresponding to the plurality of wavelength adjusters 41; further, the first electrode layer 412(ITO/Ti/Au) and the second electrode layer 413(ITO/Au/Ti) need to be patterned to form a plurality of first electrode lines 4121 and a plurality of second electrode lines 4131.
Further, step 104 may be further included after step 103
104. Polarizing the first electrode layer (ITO/Ti/Au) and the second electrode layer 413 (ITO/Au/Ti);
specifically, the first electrode layer 412 and the first electrode layer 413 are polarized in different directions, so that the piezoelectric property of the deformation layer 411(PZT) is enhanced by 20%, and further, the power consumption of the first electrode layer 412(ITO/Ti/Au) and the second electrode layer 413(ITO/Au/Ti) is reduced when the electrodes are driven; the polarization conditions in this example are 120 ℃, 6hr, and 10Kv, but the present invention is not limited thereto, and can be adjusted by those skilled in the art according to actual design.
The above-mentioned manufacturing process of the display panel is only an example, and does not limit the scope of the present application, and other means or processes known to those skilled in the art may be used, so long as the structure of the display panel finally obtained is included in the display panel structure disclosed in the present application, which all fall into the scope of the present application.
Example 2
Further, an embodiment of the present application provides a display device, which includes the display panel.
The specific structure and the principle of solving the uneven light emitting wavelength of the display panel described in embodiment 1 are described in detail in embodiment 1, and are not described herein again.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A display panel, characterized in that: which comprises
The light-emitting device comprises a driving back plate, a pixel defining layer, a light-emitting device layer, a supporting layer and a wave modulating layer which are sequentially stacked, wherein the light-emitting device layer comprises a plurality of sub-pixels which are arranged in a matrix;
the wave modulation layer comprises a plurality of wavelength adjusting pieces, the wavelength adjusting pieces correspond to the sub-pixels one to one, and the wavelength adjusting pieces are used for changing the light emitting wavelengths of the sub-pixels.
2. The display panel according to claim 1, characterized in that:
the wavelength adjusting piece comprises a deformation layer, a first electrode layer and a second electrode layer;
the deformation layer is arranged on one side of the supporting layer, which is far away from the driving back plate;
the first electrode layer and the second electrode layer are electrically connected to a driving power supply of the display panel;
the deformation layer deforms in response to the voltage difference between the first electrode layer and the second electrode layer so as to compensate for the internal stress of the sub-pixels and adjust the light-emitting wavelength of the sub-pixels.
3. The display panel according to claim 2, characterized in that:
the first electrode layer and the second electrode layer are arranged on the same layer on one side of the deformation layer, which is far away from the driving back plate; or
The first electrode layer and the second electrode layer are arranged on the same layer on one side of the deformation layer facing the driving back plate.
4. The display panel according to claim 3, wherein:
the first electrode layer comprises a plurality of first electrode wires which are arranged side by side along a first direction at intervals;
the second electrode layer comprises a plurality of second electrode wires which are arranged side by side along the first direction at intervals;
the plurality of first electrode wires and the plurality of second electrode wires are alternately arranged along the first direction;
the first direction is the length direction of the driving backboard, or the width direction of the driving backboard, or a direction forming a preset included angle with the length/width direction of the TTF substrate.
5. The display panel according to claim 4, characterized in that:
the device also comprises a first connecting line and a second connecting line;
the first connecting line and the second connecting line are arranged along the first direction and are arranged oppositely;
the first connecting lines are connected to the first ends of the first electrode wires at the same time, and the second connecting lines are connected to the ends, far away from the first ends of the first electrode wires, of the second electrode wires at the same time.
6. The display panel according to claim 4, wherein:
the width of the first electrode lines and the width of the second electrode lines along the first direction are 1-10 micrometers;
the distance between the adjacent first electrode lines and the adjacent second electrode lines in the first direction is 1-40 micrometers.
7. The display panel according to claim 3, wherein:
the first electrode layer and the second electrode layer are polarized electrode layers, and the polarization directions of the first electrode layer and the second electrode layer are opposite.
8. The display panel according to claim 2, characterized in that:
the deformation layer is a piezoelectric material.
9. The display panel according to claim 1, characterized in that:
the orthographic projection of the wavelength adjusting piece towards the driving back plate is smaller than the orthographic projection of the sub-pixels towards the driving back plate.
10. The display panel according to claim 1, characterized in that:
also includes a strengthening layer;
the strengthening layer is arranged between the supporting layer and the wavelength adjusting piece and used for improving the wavelength adjusting function of the wavelength adjusting piece.
11. A display device, characterized in that it comprises:
the display panel of any one of claims 1-10.
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