Patent Description:
With the rapid development of display technologies, various new technologies are constantly emerging, and a display device has diversified functions. For example, a mirror display device has both an image display function and a mirror imaging function, and is able to meet various needs of people, and the application thereof is increasingly wide.

<CIT> provides a display substrate and a preparation method thereof and a display device. The display substrate comprises a light-emitting unit layer arranged on a base and a reflecting layerarranged on the light-emitting unit layer, the light-emitting unit layer comprises a plurality of light-emitting units corresponding to different colors, and the reflecting layer is provided with light-transmitting holes corresponding to the light-emitting units in a one-to-one mode. A light modulation layer is arranged on the side, away from the substrate, of the reflection layer and is configured to reflect part of light of the blue light wave band and transmit light of the wave band outside the blue light wave band. According to the display device, the light modulation layer is arranged in the mirror surface display substrate, and the light modulation layer is configured to reflect part of the light of the blue light wave band and transmit the light of the wave band outside the blue light wave band.

<CIT> provides an organic light emitting display device includes a substrate, a dielectric mirror structure, a reflection pattern, and a pixel structure. The substrate includes a first region and a second region adjacent to the first region. The dielectric mirror structure is disposed on the substrate. The reflection pattern is disposed in the second region on the substrate. The pixel structure is disposed in the first region on the substrate.

<CIT> provides a display substrate and a preparation method thereof and a display device. The display substrate comprises a light-emitting unit layer arranged on a substrate and a mirror surface layer arranged on the light-emitting unit layer. A light modulation layer is arranged on one side, far away from the substrate, of the mirror surface layer, and the light modulation layer is configured to form mirror surface display with a set color. According to the invention, the light modulation layer is arranged in the mirror surface display substrate; the light modulation layer is configured to form mirror surface display of a set color; high transmittance of light can be ensured during display.

In an aspect, the present disclosure provides a display panel, which is defined in independent claim <NUM>.

In another aspect, the present disclosure provides a display device, which is defined in independent claim <NUM>.

In yet another aspect, the present disclosure provides a method for manufacturing a display panel, which is defined in independent claim <NUM>.

It is to be understood that both the forgoing general description and the following detailed description are exemplary only, and are not restrictive of the present disclosure.

In order to describe technical solutions in the present disclosure more clearly, accompanying drawings to be used in some embodiments of the present disclosure will be introduced briefly below. Obviously, the accompanying drawings to be described below are merely accompanying drawings of some embodiments of the present disclosure, and a person of ordinary skill in the art may obtain other drawings according to these drawings. In addition, the accompanying drawings to be described below may be regarded as schematic diagrams, but are not limitations on an actual size of a product, an actual process of a method, and an actual timing of a signal involved in the embodiments of the present disclosure.

Technical solutions in some embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings below. Obviously, the described embodiments are merely some but not all embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure shall be included in the protection scope of the present disclosure.

Unless the context requires otherwise, throughout the description and the claims, the term "comprise" and other forms thereof such as the third-person singular form "comprises" and the present participle form "comprising" are construed as an open and inclusive meaning, i.e., "including, but not limited to. " In the description of the specification, the terms such as "one embodiment," "some embodiments," "exemplary embodiments," "an example," "specific example" or "some examples" are intended to indicate that specific features, structures, materials or characteristics related to the embodiment(s) or example(s) are included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment(s) or example(s). In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any suitable manner.

Hereinafter, the terms such as "first" and "second" are only used for descriptive purposes, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the term "a plurality of/the plurality of" means two or more unless otherwise specified.

The phrase "at least one of A, B and C" has the same meaning as the phrase "at least one of A, B or C", both including following combinations of A, B and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B and C.

The phrase "A and/or B" includes following three combinations: only A, only B, and a combination of A and B.

The use of the phrase "applicable to" or "configured to" herein means an open and inclusive expression, which does not exclude devices that are applicable to or configured to perform additional tasks or steps.

In addition, the use of the phrase "based on" is meant to be open and inclusive, in that a process, step, calculation, or other action that is "based on" one or more of the stated conditions or values may, in practice, be based on additional conditions or values exceeding those stated.

The term such as "approximately" or "substantially" as used herein includes a stated value and an average value within an acceptable range of deviation of a particular value determined by a person of ordinary skill in the art, considering measurement in question and errors associated with measurement of a particular quantity (i.e., limitations of a measurement system).

Exemplary embodiments are described herein with reference to sectional views and/or plan views as idealized exemplary drawings. In the accompanying drawings, thicknesses of layers and regions are enlarged for clarity. Thus, variations in shape relative to the accompanying drawings due to, for example, manufacturing techniques and/or tolerances may be envisaged. Therefore, the exemplary embodiments should not be construed to be limited to the shapes of regions shown herein, but to include deviations in shape due to, for example, manufacturing. For example, an etched region shown in a rectangular shape generally has a curved feature. Therefore, the regions shown in the accompanying drawings are schematic in nature, and their shapes are not intended to show actual shapes of the regions in a device, and are not intended to limit the scope of the exemplary embodiments.

In the related art, a mirror display device directly reflects an incident light by using a metal reflection layer, so as to realize mirror function(s). However, the metal reflection layer has a high light reflectivity, and when a user uses the mirror function(s) of the mirror display device, a mirror surface has a single color, and the user is likely to feel glare, thereby generating a dazzling feeling.

Based on this, as shown in <FIG>, some embodiments of the present disclosure provide a display panel <NUM>. The display panel <NUM> includes a substrate <NUM>, a light-emitting structure layer <NUM>, a specular reflection layer <NUM> and an interference adjustment layer <NUM>. The light-emitting structure layer <NUM> is located on a side of the substrate <NUM>. The light-emitting structure layer <NUM> has a plurality of light-emitting regions <NUM> and a non-light-emitting region <NUM> for spacing the plurality of light-emitting regions <NUM> apart from each other. The specular reflection layer <NUM> is located on a side of the light-emitting structure layer <NUM> away from the substrate <NUM>. The specular reflection layer <NUM> covers at least the non-light-emitting region <NUM>. The interference adjustment layer <NUM> is located on a side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>. The interference adjustment layer <NUM> is configured such that lights of some colors interfere destructively to form a mirror display of a set color.

The substrate <NUM> may be made of polyimide (PI).

The light-emitting structure layer <NUM> has the plurality of light-emitting regions <NUM>. For example, the light-emitting structure layer <NUM> may have a plurality of red light-emitting regions 201a, a plurality of green light-emitting regions 201b and a plurality of blue light-emitting regions 201c (as shown in <FIG>). Alternatively, the light-emitting structure layer <NUM> may have a plurality of red light-emitting regions, a plurality of green light-emitting regions, a plurality of blue light-emitting regions and a plurality of white light-emitting regions. Light-emitting devices in the plurality of light-emitting regions <NUM> may be driven to emit light, so as to realize a display function of the display panel <NUM>. The number of the light-emitting regions <NUM>, an arrangement of the light-emitting regions <NUM> of different colors, and a size of the light-emitting region <NUM> are not limited in the present disclosure, as long as the display panel <NUM> is able to display a screen.

For example, the display panel <NUM> may be an OLED display panel, and in this case, the light-emitting device in the light-emitting structure layer <NUM> may be an organic light-emitting diode. Based on this, the light-emitting structure layer <NUM> may include an anode layer, an organic light-emitting layer and a cathode layer. Alternatively, the light-emitting structure layer <NUM> may include an anode layer, a hole transport layer, an organic light-emitting layer, an electron transport layer and a cathode layer. Alternatively, the light-emitting structure layer <NUM> may include an anode layer, a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, an electron injection layer and a cathode layer.

The specular reflection layer <NUM> covers at least the non-light-emitting region <NUM>, which may be that the specular reflection layer <NUM> covers only the non-light-emitting region <NUM>, or the specular reflection layer <NUM> covers both the plurality of light-emitting regions <NUM> and the non-light-emitting region <NUM>.

In some embodiments, as shown in <FIG>, the specular reflection layer <NUM> covers only the non-light-emitting region <NUM>. In this case, the specular reflection layer <NUM> may be a metal reflection layer <NUM>, and the metal reflection layer <NUM> may include a plurality of second openings <NUM> for exposing the plurality of light-emitting regions <NUM>. By such arrangement, not only the metal reflection layer <NUM> is able to effectively reflect light incident on the display panel <NUM>, but also a case that the display panel <NUM> cannot display normally due to light emitted from the light-emitting region <NUM> being blocked by the specular reflection layer <NUM> is able to be avoided.

The specular reflection layer <NUM> may be a single-layer metal reflection layer. For example, a material of the specular reflection layer <NUM> may include at least one of aluminum, molybdenum, titanium, silver and copper.

Alternatively, the specular reflection layer <NUM> may be of a multi-layer structure including a metal reflection layer. For example, the specular reflection layer <NUM> may include a titanium metal layer, an aluminum metal layer and a titanium metal layer that are stacked in sequence. Alternatively, the specular reflection layer <NUM> may include an indium tin oxide layer, a silver metal layer and an indium tin oxide layer that are stacked in sequence.

In some other embodiments, as shown in <FIG>, the specular reflection layer <NUM> covers both the plurality of light-emitting regions <NUM> and the non-light-emitting region <NUM>. In this case, the specular reflection layer <NUM> may be a transflective layer <NUM>, and the lights emitted from the light-emitting regions <NUM> may pass through the specular reflection layer <NUM> to exit. Therefore, no opening is required to be provided in the specular reflection layer <NUM>, so that a manufacturing process of the specular reflection layer <NUM> is simplified, thereby saving time and reducing a manufacturing cost.

For example, the transflective layer <NUM> may be a reflective polarizing optical sheet, or a multi-layer optical film composed of a reflective polarizing optical sheet and a polarizer.

In some embodiments, the thickness of the specular reflection layer <NUM> may be in a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>). Here, "<NUM> ± <NUM>" means that the thickness of the specular reflection layer <NUM> may be <NUM>, and the specular reflection layer <NUM> is allowed to have a deviation of ± <NUM> in thickness, which may be caused by a process of forming the specular reflection layer <NUM>.

It will be noted that visible lights are a part that may be perceived by human eyes in an electromagnetic spectrum, and wavelengths of electromagnetic waves that may be perceived by an ordinary person's eyes are in a range of <NUM> to <NUM>. Still others are able to perceive electromagnetic waves with wavelengths between approximately <NUM> and <NUM>. Each color of visible light corresponds to a different wavelength range. For example, a purple light corresponds to a wavelength range of <NUM> to <NUM>, a blue light corresponds to a wavelength range of <NUM> to <NUM>, a green-blue light corresponds to a wavelength range of <NUM> to <NUM>, a blue-green light corresponds to a wavelength range of <NUM> to <NUM>, a green light corresponds to a wavelength range of <NUM> to <NUM>, a yellow-green light corresponds to a wavelength range of <NUM> to <NUM>, a yellow light corresponds to a wavelength range of <NUM> to <NUM>, an orange light corresponds to a wavelength range of <NUM> to <NUM>, a red light corresponds to a wavelength range of <NUM> to <NUM>.

Interference means that two or more waves are overlapped and superimposed in space to form a new waveform. Interference conditions are that two light waves have a same vibration frequency, and have a fixed phase difference at a meeting point. Destructive interference means that in the interference of light, wave crests and wave troughs of two light waves meet, and an amplitude is equal to zero.

Based on this, referring to <FIG>, the interference adjustment layer <NUM> makes the lights of some colors interfere destructively, which may be, for example, as follows. A part of a light L of a certain color is reflected on an upper surface of the interference adjustment layer <NUM>, so as to obtain a light a1. Another part of the light L is transmitted into the interference adjustment layer <NUM>, is reflected on a lower surface of the interference adjustment layer <NUM>, and is finally emitted from the upper surface of the interference adjustment layer <NUM>, so as to obtain a light a2. The interference adjustment layer <NUM> makes a path difference between the light a1 and the light a2 be an odd multiple of a half-wavelength of the light of this color, so that wave crests and wave troughs of the light a1 and the light a2 meet in the interference, and an amplitude becomes zero.

In the claimed invention, the interference adjustment layer <NUM> is provided on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>, and the interference adjustment layer <NUM> is used to make the lights of some colors interfere destructively. On one hand, an intensity of a light reflected by the display panel <NUM> is able to be effectively reduced, so that a color of a mirror display screen of the display panel <NUM> is dark, and a user is less likely to feel glare and dazzling when using mirror function(s) of the display panel <NUM>. On another hand, by this arrangement, the display panel <NUM> is able to form the mirror display of the set color, so that the display panel is more beautiful, and a fashionability of the display panel <NUM> is improved.

In some embodiments, as shown in <FIG>, not forming part of the claimed invention, the interference adjustment layer <NUM> includes at least two first refractive index layers <NUM> that are stacked, and a second refractive index layer <NUM> located between every two adjacent first refractive index layers <NUM>. A refractive index of the second refractive index layer <NUM> is greater than that of the first refractive index layer <NUM>.

For example, the interference adjustment layer <NUM> may include a first refractive index layer <NUM>, a second refractive index layer <NUM>, a first refractive index layer <NUM>, a second refractive index layer <NUM> and a first refractive index layer <NUM> that are stacked in sequence (as shown in <FIG>). Alternatively, the interference adjustment layer <NUM> may include a first refractive index layer <NUM>, a second refractive index layer <NUM> and a first refractive index layer <NUM> that are stacked in sequence. Alternatively, the interference adjustment layer <NUM> may include a first refractive index layer <NUM>, a second refractive index layer <NUM>, a first refractive index layer <NUM>, a second refractive index layer <NUM>, a first refractive index layer <NUM>, a second refractive index layer <NUM> and a first refractive index layer <NUM> that are stacked in sequence. The number of first refractive index layers <NUM> and the number of second refractive index layer(s) <NUM> are not limited thereto in the present disclosure, as long as the lights of some colors interfere destructively.

By providing an outermost layer of the interference adjustment layer <NUM> as the first refractive index layer <NUM> with a low refractive index, more light irradiated from a side of the interference adjustment layer <NUM> away from the specular reflection layer <NUM> to the interference adjustment layer <NUM> is able to be incident into the interference adjustment layer <NUM>. Moreover, since the interference adjustment layer <NUM> includes a structure in which the first refractive index layers <NUM> with a low refractive index and the second refractive index layer(s) <NUM> with a high refractive index are overlapped with each other, it is possible to make the lights of some colors interfere destructively by using the multiple-beam interference principle, so that a color of a mirror surface formed by the interference adjustment layer <NUM> is dark.

In some embodiments, a material of the first refractive index layer <NUM> may include silicon dioxide (SiO<NUM>) or magnesium fluoride (MgF).

In some embodiments, the refractive index of the first refractive index layer <NUM> is in a range of <NUM> to <NUM>, inclusive.

In some embodiments, a material of the second refractive index layer <NUM> may include metal. For example, the second refractive index layer <NUM> may made of any one of aluminum, molybdenum, titanium, silver and copper. The thickness of the second refractive index layer <NUM> may be in a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>). That is, the thickness of the second refractive index layer <NUM> may be <NUM>, and the second refractive index layer <NUM> may have a deviation of ± <NUM> in thickness, which may be caused by a process of forming the second refractive index layer <NUM>.

In some embodiments, the thickness of the first refractive index layer <NUM> may be in any one of a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ±<NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>) or a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>). It will be noted that "± <NUM>" means that the first refractive index layer <NUM> may have a deviation of ± <NUM> in thickness, and this deviation may be caused by a process of forming the first refractive index layer <NUM>.

For example, in a case where the specular reflection layer <NUM> is made of molybdenum metal, the first refractive index layer <NUM> is made of silicon dioxide, the second refractive index layer <NUM> is made of titanium metal, the thickness of the specular reflection layer <NUM> is <NUM>, the thickness of the second refractive index layer <NUM> is <NUM>, and the thickness of the first refractive index layer <NUM> is <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or <NUM>, test results of a reflectivity (i.e., a ratio of a light intensity of a reflected light to a light intensity of an incident light) of the interference adjustment layer <NUM> after lights with wavelengths are reflected by the interference adjustment layer <NUM> are shown in <FIG>; not forming part of the claimed invention.

In combination with <FIG>, it can be seen that in the case where the thickness of the first refractive index layer <NUM> is <NUM>, for light with a wavelength range of approximately <NUM> to <NUM>, the reflectivity is highest. That is, the interference adjustment layer <NUM> reflects a purple light most, and the interference adjustment layer <NUM> may form a purple mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, for light with a wavelength range of approximately <NUM> to <NUM>, the reflectivity is highest. That is, the interference adjustment layer <NUM> reflects a blue light most, and thus the interference adjustment layer <NUM> may form a blue mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, for light with a wavelength range of approximately <NUM> to <NUM>, the reflectivity is highest. That is, the interference adjustment layer <NUM> reflects a green light most, and the interference adjustment layer <NUM> may form a green mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, for light with a wavelength range of approximately <NUM> to <NUM>, the reflectivity is highest. That is, the interference adjustment layer <NUM> reflects a yellow light most, and the interference adjustment layer <NUM> may form a yellow mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, for light with a wavelength range of approximately <NUM> to <NUM>, the reflectivity is highest. That is, the interference adjustment layer <NUM> reflects an orange light most, and the interference adjustment layer <NUM> may form an orange mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, for light with a wavelength range of approximately <NUM> to <NUM>, the reflectivity is highest. That is, the interference adjustment layer <NUM> reflects a red light most, and the interference adjustment layer <NUM> may form a red mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, for light with a wavelength range of approximately <NUM> to <NUM>, the reflectivity is highest. That is, the interference adjustment layer <NUM> reflects a purple-red light most, and the interference adjustment layer <NUM> may form a purple-red mirror display.

In addition, based on the reflectivity curves shown in <FIG>, in combination with the light source spectrum and the color matching function of human eyes, tristimulus values X, Y and Z are able to be calculated. According to the tristimulus values X, Y and Z, chromaticity coordinate values may be calculated, so that a color of a light reflected by the interference adjustment layer <NUM> is obtained by using the chromaticity coordinate values and the CIE chromaticity diagram.

For example, the tristimulus values X, Y and Z may be calculated by using following Formula (<NUM>), Formula (<NUM>) and Formula (<NUM>), and then the chromaticity coordinate values may be calculated by using Formula (<NUM>) and Formula (<NUM>). <MAT> <MAT> <MAT> <MAT>.

Here, R(λ) represents a reflectivity for a light with a wavelength of λ , S(λ) represents an energy of a light with a wavelength of λ in a natural light source, x(λ), y(λ) and z(λ) represent color matching function values for a light with a wavelength of λ , and λ is a wavelength of a light wave.

Following chromaticity coordinate values may be calculated by using the above formulas. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the first refractive index layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the first refractive index layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the first refractive index layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the first refractive index layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the first refractive index layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the first refractive index layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>).

On this basis, in combination with <FIG>, not forming part of the claimed invention, it can be seen that in the case where the thickness of the first refractive index layer <NUM> is <NUM>, a chromaticity coordinate point is located in a purple region, and is close to an edge of the chromaticity diagram. That is, the interference adjustment layer <NUM> is able to reflect a dark purple light to form a dark purple mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, a chromaticity coordinate point is located in a blue region, and is close to the edge of the chromaticity diagram, and the interference adjustment layer <NUM> reflects a dark blue light to form a dark blue mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, a chromaticity coordinate point is located in a green region, and is close to the edge of the chromaticity diagram, and the interference adjustment layer <NUM> reflects a dark green light to form a dark green mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, a chromaticity coordinate point is located in a yellow region, and is close to the edge of the chromaticity diagram, and the interference adjustment layer <NUM> reflects a dark yellow light to form a dark yellow mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, a chromaticity coordinate point is located in an orange region, and is close to the edge of the chromaticity diagram, and the interference adjustment layer <NUM> reflects a dark orange light to form a dark orange mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, a chromaticity coordinate point is located in a red region, and is close to the edge of the chromaticity diagram, and the interference adjustment layer <NUM> reflects a dark red light to form a dark red mirror display. In the case where the thickness of the first refractive index layer <NUM> is <NUM>, a chromaticity coordinate point is located in a purple-red region, and is close to the edge of the chromaticity diagram, and the interference adjustment layer <NUM> reflects a dark purple-red light to form a dark purple-red mirror display.

In this way, in a case where the structure of the interference adjustment layer <NUM> is used in some embodiments of the present disclosure, the color of the mirror surface formed by reflection of the display panel <NUM> may be adjusted by changing the thickness of the first refractive index layer <NUM>, and the color of the mirror surface may be any one of dark purple, dark blue, dark green, dark yellow, dark orange, dark red or dark purple-red.

In some embodiments, not forming part of the claimed invention, referring to <FIG> and <FIG>, in a case where the interference adjustment layer <NUM> includes the at least two first refractive index layers <NUM> and the second refractive index layers <NUM> located between every two adjacent first refractive index layers <NUM>, the interference adjustment layer <NUM> may further include a plurality of first openings <NUM> for exposing the plurality of light-emitting regions <NUM>.

The plurality of first openings <NUM> are provided in the interference adjustment layer <NUM> to expose the plurality of light-emitting regions <NUM>, so that light emitted from the light-emitting device in the light-emitting region <NUM> is able to not pass through the interference adjustment layer <NUM>, so as to reduce an energy loss of the light emitted from the light-emitting device, thereby ensuring that the display panel <NUM> is able to normally display a screen when a color mirror display is realized.

In the claimed invention, the interference adjustment layer <NUM> is of a single-layer structure. In this case, a material of the interference adjustment layer <NUM> includes at least one of tantalum (Ta) metal and molybdenum oxide (MoOx). Alternatively, the material of the interference adjustment layer <NUM> includes at least one of molybdenum dioxide (MoO<NUM>), ferric oxide (Fe<NUM>O<NUM>) and indium oxide (In<NUM>O<NUM>). Alternatively, the material of the interference adjustment layer <NUM> includes at least one of niobium carbide (NbC) and zinc oxide (ZnO).

For example, in a case where the interference adjustment layer <NUM> is made of a mixture of tantalum metal and molybdenum oxide, by adjusting proportions of tantalum metal and molybdenum oxide, for a light with a wavelength of <NUM>, a refractive index of the interference adjustment layer <NUM> is approximately <NUM>, and an extinction coefficient of the interference adjustment layer <NUM> is approximately <NUM>. In a case where the interference adjustment layer <NUM> is made of a mixture of molybdenum dioxide, ferric oxide and indium oxide, by adjusting proportions of molybdenum dioxide, ferric oxide and indium oxide, for the light with the wavelength of <NUM>, the refractive index of the interference adjustment layer <NUM> is approximately <NUM>, and the extinction coefficient of the interference adjustment layer <NUM> is approximately <NUM>. In a case where the interference adjustment layer <NUM> is made of a mixture of niobium carbide and zinc oxide, by adjusting proportions of niobium carbide and zinc oxide, for the light with the wavelength of <NUM>, the refractive index of the interference adjustment layer <NUM> is approximately <NUM>, and the extinction coefficient of the interference adjustment layer <NUM> is approximately <NUM>.

The interference adjustment layer <NUM> is configured such that, for the light with the wavelength of <NUM>, the refractive index of the interference adjustment layer is in a range of <NUM> to <NUM>, inclusive, and the extinction coefficient of the interference adjustment layer is in a range of <NUM> to <NUM>, inclusive.

By using the single-layer interference adjustment layer in the claimed invention, an absorption effect of the interference adjustment layer <NUM> on a light incident on the display panel <NUM> is able to be improved, thereby realizing a dark color mirror display of the display panel <NUM>.

In a case where the interference adjustment layer <NUM> is of the single-layer structure, and, in some embodiments, the specular reflection layer <NUM> is made of aluminum metal, the mirror surface formed by the interference adjustment layer <NUM> has a wider color gamut. That is, chromaticity coordinate points are more dispersed in the chromaticity diagram, and are closer to the edge of the chromaticity diagram, and the color of the mirror display may be darker.

In some embodiments, the thickness of the interference adjustment layer <NUM> may be in any one of a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>) or a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>). Here, "± <NUM>" means that the interference adjustment layer <NUM> may have a deviation of ± <NUM> in thickness, and this deviation may be, for example, caused by a process of forming the interference adjustment layer <NUM>.

For example, in a case where the specular reflection layer <NUM> is made of aluminum metal, the material of the interference adjustment layer <NUM> includes niobium carbide and zinc oxide, the thickness of the specular reflection layer <NUM> is <NUM>, and the thickness of the interference adjustment layer <NUM> is <NUM>, <NUM> or <NUM>, test results of the reflectivity of the interference adjustment layer <NUM> after lights with wavelengths are reflected by the interference adjustment layer <NUM> are shown in <FIG>.

On this basis, according to the reflectivity curves shown in <FIG>, in combination with the light source spectrum and the color matching function of human eyes, tristimulus values X, Y and Z of a light reflected by the interference adjustment layer <NUM> may be calculated by using the above Formula (<NUM>), Formula (<NUM>) and Formula (<NUM>) in the case where the thickness of the interference adjustment layer <NUM> is <NUM>, <NUM> or <NUM>. Based on the tristimulus values X, Y and Z of the light reflected by the interference adjustment layer <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> may be calculated according to the above Formula (<NUM>) and Formula (<NUM>). In the case where the thickness of the interference adjustment layer <NUM> is <NUM>, <NUM> or <NUM>, the color of the light reflected by the interference adjustment layer <NUM> may be determined by using the chromaticity coordinate values and the CIE chromaticity diagram.

In the case where the thickness of the interference adjustment layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are calculated to be x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the interference adjustment layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are calculated to be x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the interference adjustment layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are calculated to be x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>).

In combination with <FIG>, it can be seen that in the case where the thickness of the interference adjustment layer <NUM> is <NUM>, a chromaticity coordinate point is located in the yellow region, and is close to the edge of the chromaticity diagram, and thus the interference adjustment layer <NUM> reflects a dark yellow light to form a dark yellow mirror display. In the case where the thickness of the interference adjustment layer <NUM> is <NUM>, a chromaticity coordinate point is located in the purple region, and is close to the edge of the chromaticity diagram, and thus the interference adjustment layer <NUM> reflects a dark purple light to form a dark purple mirror display. In the case where the thickness of the interference adjustment layer <NUM> is <NUM>, a chromaticity coordinate point is located in the blue region, and is close to the edge of the chromaticity diagram, and thus the interference adjustment layer <NUM> reflects a dark blue light to form a dark blue mirror display.

In this way, the single-layer interference adjustment layer <NUM> is formed on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>. On one hand, the intensity of the light reflected by the display panel <NUM> may be low, the color of the mirror display may be dark, so that the user is less likely to feel glare and dazzling when using the display panel <NUM>. On another hand, by changing the thickness of the interference adjustment layer <NUM>, the display panel <NUM> is able to display a dark yellow mirror surface, a dark purple mirror surface or a dark blue mirror surface, so that the fashionability of the display panel <NUM> is improved.

In the claimed invention, as shown in <FIG>, in the case where the interference adjustment layer <NUM> is of the single-layer structure, the interference adjustment layer <NUM> may include a plurality of first openings <NUM> for exposing the plurality of light-emitting regions <NUM>. In this way, when the display panel <NUM> drives the light-emitting device in the light-emitting region <NUM> to emit light, the light emitted from the light-emitting device may not pass through the interference adjustment layer <NUM>, so as to reduce a loss of the light emitted from the light-emitting region <NUM>, thereby ensuring that the display panel <NUM> is able to normally display a screen when the color mirror display of the display panel <NUM> is realized.

In some other embodiments, the thickness of the interference adjustment layer <NUM> is in a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>). Here, "<NUM> ± <NUM>" means that the thickness of the interference adjustment layer <NUM> may be <NUM>, and the interference adjustment layer <NUM> is allowed to have a deviation of ± <NUM> in thickness, and this deviation may be caused by the process of forming the interference adjustment layer <NUM>.

On this basis, the display panel <NUM> may further include a light transmission adjustment layer <NUM>. The light transmission adjustment layer <NUM> may be provided between the specular reflection layer <NUM> and the interference adjustment layer <NUM>. The thickness of the light transmission adjustment layer <NUM> may be in any one of a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), or a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>). Here, "± <NUM>" means that the light transmission adjustment layer <NUM> may have a deviation of ± <NUM> in thickness, and this deviation may be, for example, caused by a process of forming the light transmission adjustment layer <NUM>.

By providing the light transmission adjustment layer <NUM>, the thickness of the interference adjustment layer <NUM> is able to be reduced, and a transmittance of the interference adjustment layer <NUM> is able to be increased. When the display function of the display panel <NUM> is realized, even if the light emitted from the light-emitting region <NUM> passes through the interference adjustment layer <NUM>, the energy loss is small, and the interference adjustment layer <NUM> has little influence on a display effect of the display panel <NUM>. Based on this, no openings are required to be provided at respective positions of the interference adjustment layer <NUM> corresponding to the plurality of light-emitting regions <NUM>, so that when the interference adjustment layer <NUM> is manufactured, the openings are not required to be formed by etching, which simplifies a process, and reduces costs.

For example, in a case where the specular reflection layer <NUM> is made of molybdenum metal, the material of the interference adjustment layer <NUM> includes niobium carbide and zinc oxide, the light transmission adjustment layer <NUM> is made of indium tin oxide, the thickness of the specular reflection layer <NUM> is <NUM>, the thickness of the interference adjustment layer <NUM> is <NUM>, and the thickness of the light transmission adjustment layer <NUM> is <NUM>, <NUM> or <NUM>, test results of a reflectivity of the display panel <NUM> after lights with different wavelengths are reflected by the display panel <NUM> are shown in <FIG>.

On this basis, according to the reflectivity curves shown in <FIG>, in combination with the light source spectrum and the color matching function of human eyes, tristimulus values X, Y and Z of the light reflected by the interference adjustment layer <NUM> may be obtained by using the above Formula (<NUM>), Formula (<NUM>) and Formula (<NUM>) in the case where the thickness of the light transmission adjustment layer <NUM> is <NUM>, <NUM> or <NUM>. Based on the tristimulus values X, Y and Z, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> may be calculated by using the above Formula (<NUM>) and Formula (<NUM>). The color of the light reflected by the interference adjustment layer <NUM> may be determined according to the chromaticity coordinate values and the CIE chromaticity diagram.

In the case where the thickness of the light transmission adjustment layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are calculated to be x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the light transmission adjustment layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are calculated to be x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>). In the case where the thickness of the light transmission adjustment layer <NUM> is <NUM>, chromaticity coordinate values of the light reflected by the interference adjustment layer <NUM> are calculated to be x that is equal to <NUM>, and y that is equal to <NUM> (i.e., x=<NUM> and y=<NUM>).

In combination with <FIG>, it can be seen that in the case where the thickness of the light transmission adjustment layer <NUM> is <NUM>, a chromaticity coordinate point is located in the yellow region, and is close to the edge of the chromaticity diagram, and thus the interference adjustment layer <NUM> reflects a dark yellow light to form a dark yellow mirror display. In the case where the thickness of the light transmission adjustment layer <NUM> is <NUM>, a chromaticity coordinate point is located in the purple region, and is close to the edge of the chromaticity diagram, and thus the interference adjustment layer <NUM> reflects a dark purple light to form a dark purple mirror display. In the case where the thickness of the light transmission adjustment layer <NUM> is <NUM>, a chromaticity coordinate point is located in the blue region, and is close to the edge of the chromaticity diagram, and thus the interference adjustment layer <NUM> reflects a dark blue light to form a dark blue mirror display.

In this way, the color of the mirror display of the display panel <NUM> may be adjusted by changing the thickness of the light transmission adjustment layer <NUM>, so that the mirror display is able to display dark yellow, dark purple or dark blue, thereby improving the fashionability of the display panel <NUM>.

For example, the light transmission adjustment layer <NUM> may be made of indium tin oxide (ITO). Alternatively, the light transmission adjustment layer <NUM> may be made of silicon nitride (SiNx). Alternatively, for example, the light transmission adjustment layer <NUM> may be made of silicon dioxide (SiO<NUM>).

In some embodiments, as shown in <FIG>, <FIG>, <FIG> and <FIG>, the display panel <NUM> further includes an encapsulation layer <NUM>. The encapsulation layer <NUM> is located between the light-emitting structure layer <NUM> and the specular reflection layer <NUM>. The encapsulation layer <NUM> is configured to encapsulate the light-emitting structure layer <NUM> on the substrate <NUM>. In a case where the display panel <NUM> is an organic light-emitting diode (OLED) display panel, the light-emitting structure layer may be a light-emitting functional layer (e.g., including an anode, an organic light-emitting structure layer and a cathode). In this case, the encapsulation layer <NUM> is provided between the light-emitting structure layer <NUM> and the specular reflection layer <NUM>, which is further able to be beneficial to protecting the light-emitting structure layer <NUM>, so as to prevent the light-emitting structure layer <NUM> from being corroded by water vapor.

For example, the encapsulation layer <NUM> may be of a multi-layer structure, which includes an inorganic material layer, an organic material layer and an inorganic material layer that are stacked in sequence. The organic material layer is provided between the two inorganic material layers.

In some embodiments, as shown in <FIG>, the display panel <NUM> further includes an optical adhesive layer <NUM> and a protective cover plate <NUM>. The protective cover plate <NUM> is located on the side of the interference adjustment layer <NUM> away from the specular reflection layer <NUM>. The protective cover plate <NUM> is configured to protect the interference adjustment layer <NUM>, the specular reflection layer <NUM> and the light-emitting structure layer <NUM>. The optical adhesive layer <NUM> is located between the interference adjustment layer <NUM> and the protective cover plate <NUM>. The optical adhesive layer <NUM> is configured to adhere the protective cover plate <NUM> to a surface of the interference adjustment layer <NUM> away from the specular reflection layer <NUM>.

The protective cover plate <NUM> may be a glass cover plate.

It will be noted that as shown in <FIG>, the display panel <NUM> further includes a circuit structure layer <NUM> disposed between the light-emitting structure layer <NUM> and the substrate <NUM>. The circuit structure layer <NUM> is used for driving the light-emitting devices in the light-emitting regions <NUM> in the light-emitting structure layer <NUM> to emit light.

In some embodiments, the circuit structure layer <NUM> may include a plurality of thin film transistors and storage capacitors for forming pixel driving circuits. The thin film transistor may be, for example, a low temperature poly-silicon (LTPS) thin film transistor, or an indium gallium zinc oxide (IGZO) thin film transistor. For example, the circuit structure layer <NUM> may include an active layer, a first insulating layer, a first gate metal layer, a second insulating layer, a second gate metal layer, an interlayer dielectric layer, a source-drain electrode layer and a planarization layer that are away from the substrate <NUM> in sequence.

As shown in <FIG>, some embodiments of the present disclosure provide a method for manufacturing a display panel. The method includes S1 to S4.

In S1, a substrate <NUM> is provided. For example, a material of the substrate <NUM> may include polyimide.

In S2, a light-emitting structure layer <NUM> is formed on a side of the substrate <NUM>. The light-emitting structure layer <NUM> has a plurality of light-emitting regions <NUM> and a non-light-emitting region <NUM> for spacing the plurality of light-emitting regions <NUM> apart from each other.

In S3, a specular reflection layer <NUM> is formed on a side of the light-emitting structure layer <NUM> away from the substrate <NUM>. The specular reflection layer <NUM> covers at least the non-light-emitting region <NUM>.

In S4, the interference adjustment layer <NUM> is formed on a side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>. The interference adjustment layer <NUM> is configured such that lights of some colors interfere destructively to form a mirror display of a set color.

In the display panel manufactured by using the method for manufacturing the display panel in some embodiments of the present disclosure, the interference adjustment layer <NUM> is provided on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>, and the interference adjustment layer <NUM> may further make the lights of some colors interfere destructively. Therefore, an intensity of a light reflected by the display panel <NUM> is able to be effectively reduced, so that a color of the mirror display of the display panel <NUM> is dark, and a user is less likely to feel glare and dazzling when using the display panel <NUM>. Moreover, the display panel <NUM> is further able to form the mirror display of the set color, thereby improving the fashionability of the display panel <NUM>.

In some embodiments, not forming part of the claimed invention, as shown in <FIG>, in S4, forming the interference adjustment layer <NUM> on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>, includes S41.

In S41, first refractive index layers <NUM> and second refractive index layer(s) <NUM> are sequentially and alternately formed on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>. The number of the first refractive index layers <NUM> is one more than the number of the second refractive index layer(s) <NUM>. A refractive index of the first refractive index layer <NUM> is less than a refractive index of the second refractive index layer <NUM>.

In this way, the second refractive index layer <NUM> is located between two adjacent first refractive index layers <NUM>, and an outermost layer of the interference adjustment layer <NUM> is a low refractive index layer. More light irradiated from a side of the interference adjustment layer <NUM> away from the specular reflection layer <NUM> to the interference adjustment layer <NUM> are able to be incident into the interference adjustment layer <NUM>. Moreover, since the interference adjustment layer <NUM> includes a structure in which the first refractive index layers <NUM> with a low refractive index and the second refractive index layer(s) <NUM> with a high refractive index are overlapped with each other, it is possible to make the lights of some colors interfere destructively by using the multiple-beam interference principle, so that the color of the mirror display is dark.

In some embodiments, not forming part of the claimed invention, as shown in <FIG>, in S4, forming the interference adjustment layer <NUM> on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>, further includes S42.

In S42, all the first refractive index layers <NUM> and all the second refractive index layer(s) <NUM> are etched to form a plurality of first openings <NUM> for exposing the plurality of light-emitting regions <NUM>.

In the claimed invention, as shown in <FIG>, in S4, forming the interference adjustment layer <NUM> on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>, includes S43.

In S43, the interference adjustment layer <NUM> of a single-layer structure is formed on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>.

A material for forming the interference adjustment layer <NUM> includes at least one of tantalum metal and molybdenum oxide. Alternatively, the material for forming the interference adjustment layer <NUM> includes at least one of molybdenum dioxide, ferric oxide and indium oxide. Alternatively, the material for forming the interference adjustment layer <NUM> includes at least one of niobium carbide and zinc oxide.

For example, the thickness of the interference adjustment layer <NUM> may be in any one of a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>) or a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>). In this case, referring to <FIG>, in S4, forming the interference adjustment layer <NUM> on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>, further includes S44.

In S44, the interference adjustment layer <NUM> of the single-layer structure is etched to form a plurality of first openings <NUM> for exposing the plurality of light-emitting regions <NUM>.

By forming the plurality of first openings <NUM> in S42 or S44, when the display panel <NUM> drives the light-emitting devices in the light-emitting regions <NUM> to emit light, light emitted from the light-emitting device is able to not pass through the interference adjustment layer <NUM>, so as to reduce an energy loss of the light emitted from the light-emitting device, thereby ensuring that the display panel <NUM> is able to normally display a screen when the mirror display of the set color is realized.

For example, the thickness of the interference adjustment layer <NUM> is in a range of a difference between15 nm and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>). Based on this, as shown in <FIG>, in S4, before forming the interference adjustment layer <NUM> on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>, the method for manufacturing the display panel further includes S5.

In S5, a light transmission adjustment layer <NUM> is formed on the side of the specular reflection layer <NUM> away from the light-emitting structure layer <NUM>. The thickness of the light transmission adjustment layer <NUM> is in any one of a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>), or a range of a difference between <NUM> and <NUM> to a sum of <NUM> and <NUM> (i.e., <NUM> ± <NUM>).

By providing the light transmission adjustment layer <NUM>, the thickness of the interference adjustment layer <NUM> is able to be reduced, and a transmittance of the interference adjustment layer <NUM> is able to be increased. Thus, when the display function of the display panel <NUM> is realized, the light emitted from the light-emitting region has small energy loss after passing through the interference adjustment layer <NUM>. That is, the interference adjustment layer <NUM> has little influence on the display effect of the display panel <NUM>. Based on this, no openings are required to be provided at respective positions of the interference adjustment layer <NUM> corresponding to the plurality of light-emitting regions <NUM>, so that when the interference adjustment layer <NUM> is manufactured, the openings are not required to be formed by etching, which simplifies a manufacturing process of the display panel, and reduces costs.

In some embodiments, as shown in <FIG>, in S3, forming the specular reflection layer <NUM> on the side of the light-emitting structure layer <NUM> away from the substrate <NUM>, includes S31.

In S31, a metal reflection film is formed on the side of the light-emitting structure layer <NUM> away from the substrate <NUM>, and is etched to form a specular reflection layer <NUM> including a plurality of second openings <NUM>. The plurality of second openings <NUM> expose the plurality of light-emitting regions <NUM>.

In this way, not only light incident on the display panel <NUM> is able to be effectively reflected by using the specular reflection layer <NUM>, but also a case that the display panel <NUM> cannot display normally due to the light emitted from the light-emitting region <NUM> being blocked by the specular reflection layer <NUM> is able to be avoided.

Alternatively, in some other embodiments, as shown in <FIG>, in S3, forming the specular reflection layer <NUM> on the side of the light-emitting structure layer <NUM> away from the substrate <NUM>, includes S32.

In S32, a transflective film is formed on the side of the light-emitting structure layer <NUM> away from the substrate <NUM>. The transflective film covers the plurality of light-emitting regions <NUM> and the non-light-emitting region <NUM>, and the transflective film is the specular reflection layer <NUM>.

In this way, the light emitted from the light-emitting region <NUM> may pass through the specular reflection layer <NUM> to exit. Therefore, no openings are required to be provided in the specular reflection layer <NUM>, thereby simplifying a manufacturing process of the specular reflection layer <NUM>, saving time, and reducing manufacturing costs.

As shown in <FIG>, some embodiments of the present disclosure provide a display device <NUM> including the display panel <NUM> in any one of the above embodiments.

The display device may be an organic light-emitting diode (OLED) display device or a quantum dot light-emitting diode (QLED) display device.

The display device may be any component with a display function, such as a TV, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, or a navigator.

Beneficial effects that the display device is able to realize in the present disclosure are the same as those of the display panel in the above technical solutions, and will not be repeated here.

Claim 1:
A display panel (<NUM>), comprising:
a substrate (<NUM>);
a light-emitting structure layer (<NUM>) located on a side of the substrate; wherein the light-emitting structure layer (<NUM>) has a plurality of light-emitting regions (<NUM>) and a non-light-emitting region (<NUM>) for spacing the plurality of light-emitting regions (<NUM>) apart from each other;
a specular reflection layer (<NUM>) located on a side of the light-emitting structure layer (<NUM>) away from the substrate (<NUM>) and covering at least the non-light-emitting region (<NUM>); and
an interference adjustment layer (<NUM>) located on a side of the specular reflection (<NUM>) layer away from the light-emitting structure layer (<NUM>); wherein the interference adjustment layer (<NUM>) is configured such that lights of some colors interfere destructively to form a mirror display of a set color;
characterized in that the interference adjustment layer (<NUM>) is of a single-layer structure;
wherein a material of the interference adjustment layer (<NUM>) includes at least one of tantalum metal and molybdenum oxide; or the material of the interference adjustment layer (<NUM>) includes at least one of molybdenum dioxide, ferric oxide and indium oxide; or the material of the interference adjustment layer (<NUM>) includes at least one of niobium carbide and zinc oxide; and
the interference adjustment layer (<NUM>) is configured such that for a light with a wavelength of <NUM>, a refractive index of the interference adjustment layer (<NUM>) is in a range of <NUM> to <NUM>, inclusive, and an extinction coefficient of the interference adjustment layer (<NUM>) is in a range of <NUM> to <NUM>, inclusive.