TWI781725B - Display device - Google Patents

Abstract

A display device includes a device array substrate, a first meta-surface structure layer and a second meta-surface structure layer. The first meta-surface structure layer is disposed at one side of the device array substrate and includes a plurality of first meta-surface structure sets. The second meta-surface structure layer is disposed between the first meta-surface structure layer and the device array substrate and includes a plurality of second meta-surface structure sets. The pattern of the first meta-surface structure set is complementary to that of the second meta-surface structure set.

Description

display device

The present invention relates to a display device, and in particular to a display device capable of improving 5G millimeter wave coverage while maintaining good display quality.

With the commercialization of the fifth-generation mobile communication technology (5G), applications such as telemedicine, VR live broadcast, 4K quality live broadcast, and smart home have new opportunities for development. Since 5G has high data rate, reduced delay, energy saving, cost reduction, increased system capacity and large-scale device connection, etc., operators in different fields can also form cross-border alliances to jointly create a new generation of 5G ecological chain.

In order to improve the coverage of 5G millimeter waves, the transmittable distance of electromagnetic waves can be extended by setting a meta-surface structure (Meta-surface structure) in the display device. However, since both the metasurface structure and the display units in the display device have structural periodicity, directly combining the metasurface structure in the display device will produce a so-called moire effect, resulting in a decrease in the display quality of the display device.

The present invention provides a display device capable of improving the coverage of 5G millimeter waves while maintaining good display quality.

One embodiment of the present invention proposes a display device, comprising: an element array substrate; a first metasurface structure layer, located on one side of the element array substrate, and including multiple sets of first metasurface structure groups; and a second metasurface structure layer , is located between the first metasurface structure layer and the element array substrate, and includes multiple sets of second metasurface structure groups, wherein the patterns of the first metasurface structure group and the second metasurface structure group are complementary.

In an embodiment of the present invention, it further includes a display element layer located between the second supersurface structure layer and the element array substrate.

In an embodiment of the present invention, a filter substrate is further included, wherein the first metasurface structure layer is located between the filter substrate and the second metasurface structure layer.

In an embodiment of the present invention, a filter substrate is further included, wherein the filter substrate is located between the first metasurface structure layer and the second metasurface structure layer.

In an embodiment of the present invention, a filter substrate is further included, wherein the second metasurface structure layer is located between the filter substrate and the first metasurface structure layer.

In an embodiment of the present invention, the above-mentioned multiple sets of first metasurface structure sets or multiple sets of second metasurface structure sets are the same or different from each other.

In an embodiment of the present invention, the above-mentioned first metasurface structure group and the second metasurface structure group respectively include a plurality of metasurface structures, and the plurality of metasurface structures have the same shape and different sizes and spacings from each other. or bearing.

In an embodiment of the present invention, the above-mentioned first metasurface structure group includes a plurality of first metasurface structures, the second metasurface structure group includes a plurality of second metasurface structures, and the second metasurface structures have corresponding An opening of the metasurface structure, wherein the ratio of the length of the first metasurface structure to the length of the corresponding opening of the second metasurface structure is 0.99-1.01.

In an embodiment of the present invention, the above-mentioned first metasurface structure group includes a plurality of first metasurface structures, the second metasurface structure group includes a plurality of second metasurface structures, and the second metasurface structures have corresponding The openings of a metasurface structure, wherein the ratio of the spacing between the first metasurface structures to the corresponding spacing between the openings of the second metasurface structure is 0.99-1.01.

In an embodiment of the present invention, the above-mentioned first metasurface structure group and second metasurface structure group include transparent conductive materials.

One embodiment of the present invention proposes a display device, comprising: an element array substrate; a first metasurface structure layer, located on one side of the element array substrate, and including multiple sets of first metasurface structure groups; and a second metasurface structure layer , is located between the first metasurface structure layer and the element array substrate, and includes multiple sets of second metasurface structure groups, wherein the area of the second metasurface structure group is larger than the area of the first metasurface structure group.

In an embodiment of the present invention, the above-mentioned second metasurface structure group is grounded.

In an embodiment of the present invention, the above-mentioned orthographic projection of the first metasurface structure group on the device array substrate overlaps the orthographic projection of the second metasurface structure group on the device array substrate.

In an embodiment of the present invention, the above-mentioned second metasurface structure group is located in the device array substrate.

In an embodiment of the present invention, it further includes a display element layer located between the first super-surface structure layer and the second super-surface structure layer.

In an embodiment of the present invention, the above-mentioned first set of metasurface structures and the second set of metasurface structures include opaque conductive materials.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

FIG. 1A is a schematic partial cross-sectional view of a display device 10 according to an embodiment of the invention. FIG. 1B is a partial plan view of the metasurface structure layer 120 of the display device 10 shown in FIG. 1A . FIG. 1C is a partial plan view of the metasurface structure layer 130 of the display device 10 shown in FIG. 1A .

Please refer to FIG. 1A to FIG. 1C at the same time, the display device 10 includes: an element array substrate 110; a metasurface structure layer 120, located on one side of the element array substrate 110, and includes multiple sets of metasurface structure groups MS1; and a metasurface structure layer 130 , is located between the metasurface structure layer 120 and the element array substrate 110 , and includes multiple sets of metasurface structure sets MS2 , wherein the patterns of the metasurface structure set MS1 and the metasurface structure set MS2 are complementary.

In the display device 10 of an embodiment of the present invention, by setting the metasurface structure group MS1, 130 to control the phase delay of the electromagnetic wave, the beam steering (beam steering) of the electromagnetic wave can be realized, so that the display device 10 helps to extend the electromagnetic wave The transmission distance can be improved, thereby improving the coverage of 5G millimeter wave. In addition, by making the metasurface structure group MS1 and the metasurface structure group MS2 have complementary patterns, the uneven transmittance can be compensated and the moiré effect can be prevented, thereby maintaining good display quality.

Hereinafter, with reference to the drawings, the implementation of each component of the display device 10 will be continuously described. Referring to FIG. 1A , the element array substrate 110 of the display device 10 may include a transparent substrate or a non-transparent substrate, and its material may be quartz, glass, polymer or other suitable materials, but the present invention is not limited thereto. In this embodiment, the element array substrate 110 may further include a driving circuit layer DL, and the driving circuit layer DL may include lines or elements required by the display device 10, such as power lines, driving signal lines, timing signal lines, detection signal lines, The current compensation line, the driving element, the switching element, the storage capacitor, etc., and the above-mentioned lines or elements can be electrically connected to the lines or elements outside the driving circuit layer DL through pads or wires.

The metasurface structure layer 120 is located on the element array substrate 110 . The metasurface structure group MS1 of the metasurface structure layer 120 may include a plurality of metasurface structures constituting a minimum repeating unit. For example, in this embodiment, the metasurface structures B1, B2, and B3 constitute the minimum repeating unit, therefore, the metasurface structure group MS1 may include the metasurface structures B1, B2, and B3. Since the metasurface structures B1, B2, and B3 with different sizes have different resonance frequencies of electromagnetic waves, when an electromagnetic wave of a specific frequency is incident on the metasurface structures B1, B2, and B3, the metasurface structures B1, B2, and B3 will produce different phase delays. The induced current changes the phase of the reflected electromagnetic wave. In this way, by controlling the size of the metasurface structures B1, B2, and B3, the phase delay of the induced current can be controlled, and at the same time, the emission angle of the electromagnetic wave can be controlled by changing the size of the metasurface structures B1, B2, and B3, thereby realizing The effect of beam steering.

The sets of metasurface structure groups MS1 of the metasurface structure layer 120 may be the same as or different from each other. For example, in this embodiment, the metasurface structure layer 120 may include multiple sets of metasurface structure groups MS1 that are identical to each other, that is, the metasurface structure groups MS1 may have the same shape, size, orientation, etc., but The present invention is not limited thereto. In some embodiments, the metasurface structure layer 120 may include multiple sets of metasurface structure groups different from each other in shape, size and/or orientation.

The metasurface structure group MS1 can be roughly arranged in an array. For example, in the embodiment shown in FIG. 1B , the six sets of metasurface structure sets MS1 can be roughly arranged in a 2×3 matrix, but not limited thereto. In some embodiments, the six sets of metasurface structure sets MS1 can also be arranged in a matrix of 1x6, 3x2 or 6x1.

The metasurface structures B1 , B2 , B3 in the metasurface structure group MS1 may have the same shape as each other but different sizes from each other. For example, in this embodiment, the metasurface structures B1, B2, and B3 of the metasurface structure group MS1 can all be cross structures, and the size of the metasurface structure B1 is larger than the size of the metasurface structure B2, and the size of the metasurface structure B2 The size is larger than that of the metasurface structure B3. That is to say, the metasurface structures B1 , B2 , B3 have the same shape but different sizes, and the sizes of the metasurface structures B1 , B2 , B3 show a decreasing relationship. It should be noted that the shapes of the metasurface structures B1, B2, and B3 are not limited to the cross structure shown in Figure 1B, and the size changes of the metasurface structures B1, B2, and B3 can also be changed individually or in combination with respect to their three-dimensional dimensions. , and the shapes, sizes and orientations of the metasurface structures B1, B2, and B3 in the individual metasurface structure group MS1 can also be individually fine-tuned to achieve the required beam steering.

The size of the metasurface structures B1, B2, B3 may depend on the wavelength of the incident electromagnetic wave. For example, in this embodiment, for millimeter-wave electromagnetic waves, the size of the metasurface structures B1, B2, and B3 can be between 0.01 x 0.01 mm ² and 10 x 10 mm ² , but this is not a limitation. limit. In addition, in this embodiment, the material of the metasurface structures B1 , B2 , B3 may include transparent conductive materials, such as indium tin oxide, zinc aluminum oxide, zinc gallium oxide, zinc indium oxide, and the like.

The metasurface structure layer 130 may include multiple metasurface structure groups MS2, the metasurface structure group MS2 may include metasurface structures C1, C2, and C3, and the patterns of the metasurface structures C1, C2, and C3 are respectively the same as those of the metasurface structure group MS1. The metasurface structures B1, B2, B3 are complementary. For example, in this embodiment, the metasurface structures C1, C2, and C3 can have openings O1, O2, and O3 respectively, and the shapes and sizes of the openings O1, O2, and O3 are the same as those of the metasurface structures B1, B2, and B3. and dimensions can be the same or similar, so that the patterns of the metasurface structure layers 120, 130 can complement each other. That is to say, if the metasurface structures B1 , B2 , and B3 are placed in the openings O1 , O2 , and O3 of the metasurface structures C1 , C2 , and C3 , respectively, a flat or near-flat structure can be formed.

In this embodiment, the material of the metasurface structures C1, C2, and C3 may include transparent conductive materials, such as indium tin oxide, zinc aluminum oxide, zinc gallium oxide, zinc indium oxide, and the like. In addition, the display device 10 can also include insulating layers I1, I2 and a filter substrate CG, wherein the metasurface structure layer 120 can be located between the filter substrate CG and the metasurface structure layer 130, and the metasurface structure layer 120 can be located between the filter substrate CG and the filter substrate CG. Between the substrate CG and the insulating layer I1 , the metasurface structure layer 130 may be located between the insulating layer I1 and the insulating layer I2 to avoid unnecessary electrical connection.

In some embodiments, considering the process rationality and visual effect, the metasurface structures B1, B2, B3 of the metasurface structure group MS1 of the metasurface structure layer 120 and the metasurface of the metasurface structure group MS2 of the metasurface structure layer 130 The orthographic projections of the structures C1 , C2 , and C3 on the device array substrate 110 may partially overlap or be separated by 1%, but not limited thereto. For example, in some embodiments, the spacing W1 between the metasurface structures B1 and B2 of the metasurface structure layer 120 is the same as the spacing between the openings O1 and O2 of the corresponding metasurface structures C1 and C2 in the metasurface structure layer 130 The ratio of the distance W2 may be between 0.99-1.01. In some embodiments, the ratio of the lateral length W3 of the metasurface structure B3 of the metasurface structure layer 120 to the lateral length W4 of the opening O3 of the corresponding metasurface structure C3 in the metasurface structure layer 130 may also be 0.99-1.01.

Since the metasurface structure has the opposite characteristic for electromagnetic wave performance (such as transmittance) when the pattern is opposite, when the metasurface structure group MS1 has a low transmittance for millimeter wave signals, the metasurface structure group MS2 can be used for millimeter wave signals. Has a high penetration rate. In this way, most of the millimeter wave signal will be reflected by the metasurface structure group MS1 and will not go to the metasurface structure group MS2 below. In this case, the effect on the millimeter wave signal mainly comes from the metasurface structure group MS1, and The metasurface group MS2 will not affect the characteristics of mmWave signals. At the same time, the metasurface structure group MS1 and the metasurface structure group MS2 with complementary patterns will enable the display device 10 to have a uniform transmittance for visible light and prevent the moiré effect.

In the following, other embodiments or implementation aspects of the present invention will be described in conjunction with FIGS. 2 to 8 , wherein the same or similar element numbers as those in the embodiment of FIGS. 1A to 1C are used to denote the same or similar elements, and omitted Description of the same technical content. For the description of the omitted parts, reference may be made to the embodiment shown in FIG. 1A to FIG. 1C , which will not be repeated in the following description.

FIG. 2 is a schematic partial cross-sectional view of a display device 20 according to an embodiment of the invention. The display device 20 includes: an element array substrate 110 , a metasurface structure layer 120 , a metasurface structure layer 130 , a filter substrate CG, and an insulating layer I2 . Compared with the display device 10 shown in FIGS. 1A to 1C , the difference of the display device 20 shown in FIG. 2 is that the display device 20 may further include a color filter structure CF and a light shielding structure BM, and the color filter The structure CF and the light-shielding structure BM can replace the insulating layer I1 of the display device 10 and be located between the metasurface structure layer 120 and the metasurface structure layer 130 . That is to say, the metasurface structure layers 120 and 130 can be disposed inside the filter substrate CG, and the metasurface structure layers 120 and 130 can be located on opposite sides of the color filter structure CF and the light shielding structure BM.

FIG. 3A is a schematic partial cross-sectional view of a display device 30 according to an embodiment of the invention. FIG. 3B is a partial plan view of the metasurface structure layer 123 of the display device 30 shown in FIG. 3A . FIG. 3C is a partial plan view of the metasurface structure layer 133 of the display device 30 shown in FIG. 3A . The display device 30 includes: an element array substrate 110 , a metasurface structure layer 123 , a metasurface structure layer 133 , a filter substrate CG, and insulating layers I1 and I2 . Compared with the display device 10 shown in FIGS. 1A to 1C , the display device 30 shown in FIG. 3 is different in that: the metasurface structure layer 123 of the display device 30 includes a metasurface structure group as shown in FIG. 1C MS2 , and the metasurface structure layer 133 includes the metasurface structure group MS1 as shown in FIG. 1B .

In this embodiment, since the metasurface structure group MS2 of the metasurface structure layer 123 has a high penetration rate for millimeter wave signals, and the metasurface structure group MS1 of the metasurface structure layer 133 has a low penetration rate for millimeter wave signals, Most of the millimeter wave signals will penetrate the metasurface structure set MS2 of the metasurface structure layer 123 and then be reflected by the metasurface structure set MS1 of the metasurface structure layer 133 . In this case, the effect on the millimeter wave signal mainly comes from the metasurface structure group MS1, and the metasurface structure group MS2 also does not affect the characteristics of the millimeter wave signal. Likewise, the complementary patterns of the metasurface structure group MS1 and the metasurface structure group MS2 will enable the display device 30 to have a uniform transmittance for visible light and prevent the moiré effect.

FIG. 4 is a schematic partial cross-sectional view of a display device 40 according to an embodiment of the invention. The display device 40 includes: an element array substrate 110 , a metasurface structure layer 120 , a metasurface structure layer 130 , a filter substrate CG, an insulating layer I2 , a color filter structure CF and a light shielding structure BM. Compared with the display device 20 shown in FIG. 2, the difference of the display device 40 shown in FIG. The layer 120 may be located between the cover plate US and the filter substrate CG, and the metasurface structure layer 130 may be located between the color filter structure CF and the light shielding structure BM and the filter substrate CG. That is to say, the metasurface structure layer 120 can be located outside the filter substrate CG, and the metasurface structure layer 130 can be located inside the filter substrate CG, so that the filter substrate CG can be located between the metasurface structure layer 120 and the metasurface structure layer Between 130.

FIG. 5 is a schematic partial cross-sectional view of a display device 50 according to an embodiment of the invention. The display device 50 includes: an element array substrate 110 , a metasurface structure layer 120 , a metasurface structure layer 130 , a filter substrate CG, an insulating layer I2 , a color filter structure CF, a light shielding structure BM and a cover US. Compared with the display device 40 shown in FIG. 4, the difference of the display device 50 shown in FIG. I1, and the metasurface structure layer 120 may be located between the cover US and the insulating layer I1, and the metasurface structure layer 130 may be located between the insulating layer I1 and the filter substrate CG. That is to say, both the metasurface structure layers 120 and 130 may be disposed outside the filter substrate CG, and the metasurface structure layer 130 may be located between the filter substrate CG and the metasurface structure layer 120 .

FIG. 6 is a schematic partial cross-sectional view of a display device 60 according to an embodiment of the invention. The display device 60 includes: an element array substrate 110 , a metasurface structure layer 120 , a metasurface structure layer 130 , a filter substrate CG, an insulating layer I2 , a color filter structure CF and a light shielding structure BM. Compared with the display device 20 shown in FIG. 2, the difference of the display device 60 shown in FIG. 6 is that the display device 60 may further include a display element layer LC (such as a liquid crystal layer), a common electrode layer CM, and a polarizing layer P1, P2.

In this embodiment, the display device 60 may be a liquid crystal display device, wherein the display element layer LC is located between the metasurface structure layer 130 and the element array substrate 110, and the common electrode layer CM is located between the metasurface structure layer 130 and the display element layer LC. between, and the insulating layer I2 is located between the metasurface structure layer 130 and the common electrode layer CM. In addition, the polarizing layers P1 and P2 are respectively located on the lowermost side and the uppermost side of the display device 60 , and the polarizing layer P2 can further reduce the reflection of ambient light.

FIG. 7 is a schematic partial cross-sectional view of a display device 70 according to an embodiment of the invention. The display device 70 includes: an element array substrate 110 , a metasurface structure layer 120 , a metasurface structure layer 130 , a filter substrate CG, an insulating layer I2 , a color filter structure CF and a light shielding structure BM. Compared with the display device 20 shown in FIG. 2 , the display device 70 shown in FIG. 7 is different in that: the display device 70 may further include a light emitting element layer LD.

In this embodiment, the light-emitting element layer LD of the display device 70 may be located between the insulating layer I2 and the driving circuit layer DL, and the light-emitting element layer LD may include a plurality of light-emitting elements, such as micro light-emitting diodes (Micro-LEDs). Or an organic light emitting diode (OLED), so that the display device 70 may be a micro light emitting diode or an organic light emitting diode display device.

FIG. 8 is a schematic partial cross-sectional view of a display device 80 according to an embodiment of the invention. The display device 80 includes: an element array substrate 110, a metasurface structure layer 128, a metasurface structure layer 138, a filter substrate CG, an insulating layer I2, a color filter structure CF, a light shielding structure BM, a display element layer LC, and a common electrode layer CM And polarizing layers P1, P2. Compared with the display device 60 shown in FIG. 6 , the difference of the display device 80 shown in FIG. 8 is that the area of the metasurface structure group of the metasurface structure layer 138 is larger than that of the metasurface structure group of the metasurface structure layer 128 area, and the display element layer LC is located between the metasurface structure layer 128 and the metasurface structure layer 138 .

In this embodiment, the metasurface structure layer 128 may be located between the color filter structure CF and the light shielding structure BM and the filter substrate CG, and the metasurface structure layer 138 may be located between the display element layer LC and the element array substrate 110 . In some embodiments, the metasurface structure group of the metasurface structure layer 138 may be part of the device array substrate 110 and located in the device array substrate 110 . In some embodiments, the metasurface structure group of the metasurface structure layer 138 may also belong to the same film layer as the conductive layer in the device array substrate 110 and be electrically separated.

In this embodiment, the metasurface structure group of the metasurface structure layer 138 can be grounded, so that the metasurface structure groups of the metasurface structure layers 128 and 138 can form a patch antenna (Patch antenna). In addition, the orthographic projection of the metasurface structure group of the metasurface structure layer 128 on the element array substrate 110 can overlap a part of the orthographic projection of the metasurface structure group of the metasurface structure layer 138 on the element array substrate 110, so that the metasurface structure layer 138 The set of metasurface structures may also act as a reflective electrode for the display device 80 . Furthermore, the set of metasurface structures of the metasurface structure layer 128, 138 may comprise an opaque conductive material, such as a metal with a high reflectivity.

FIG. 9 is a schematic diagram of a metasurface structure that can be used in embodiments of the present invention. In the above embodiments, the metasurface structure of the metasurface structure layers 120, 123, 128, 130, 133, 138 can also have (a) straight bars, (b) herringbone, (c) people word anchor, (d) cross, (e) swastika, (f) cross ring, (g) herringbone ring, (h) ring, (i) square ring, (j) hexagonal ring, (k) square, (l) Hexagonal block, (m) round block, (n) sub-shaped, (o) end-folded cross ring, (p) herringbone ring-tripod and other shapes or a combination of the above shapes.

FIG. 10A is a schematic partial plan view of a metasurface structure layer 129 according to an embodiment of the present invention. Compared with the metasurface structure layer 120 shown in FIG. 1B , the difference of the metasurface structure layer 129 shown in FIG. 10A is that the metasurface structure layer 129 includes metasurface structure group sets 129K, 129L, 129M different from each other. , 129N, 129O.

For example, in this embodiment, the metasurface structures in the sets of metasurface structures 129K, 129L, 129M, and 129N have the same cross structure shape as each other, but different sizes, pitches, and/or orientations from each other, and the metasurfaces The metasurface structures of the structure group set 1290 can also be added with phase-shifting lines respectively. In detail, the metasurface structures of the metasurface structure set 129K may have different sizes, so that incident electromagnetic waves may be reflected or anomalously reflected. In addition, the metasurface structures in the set of metasurface structures 129L may have different pitches, so that incident electromagnetic waves can be scattered to generate scattered electromagnetic waves. In addition, the metasurface structures of the metasurface structure set 129M can have different orientations, so frequency shifting, intensity modulation, or polarization state control can be performed on incident electromagnetic waves to generate modulated electromagnetic waves. In addition, the metasurface structures of the set of metasurface structures 129N can have different sizes and pitches, so that incident electromagnetic waves can generate focused electromagnetic waves. By having a plurality of sets of metasurface structures 129K, 129L, 129M, and 129N on the element array substrate 110 at the same time, beam steering or multi-directional beam scattering can be realized for electromagnetic waves with multiple wavelengths or multiple incident angles at the same time, thereby achieving Improve the effect of 5G signal coverage.

FIG. 10B is a schematic partial plan view of a metasurface structure layer 139 according to an embodiment of the present invention. The metasurface structure layer 139 has a complementary pattern to that of the metasurface structure layer 129 shown in FIG. 10A . For example, the metasurface structure layer 139 may include metasurface structure group sets 139K, 139L, 139M, 139N, 139O, and the patterns of the metasurface structure group sets 139K, 139L, 139M, 139N, 139O are respectively related to the The patterns of 129K, 129L, 129M, 129N, 129O are complementary. In some embodiments, the metasurface structure layer 129 shown in FIG. 10A can be used to replace the metasurface structure layer 120 of the display device 10 shown in FIG. 1A, and the metasurface structure layer 139 shown in FIG. The metasurface structure layer 130 of the shown display device 10 is used to provide a display device capable of beam steering for electromagnetic waves of multiple wavelengths or multiple incident angles simultaneously and having good display quality.

In summary, the display device of the present invention controls the phase delay of electromagnetic waves through the metasurface structure with complementary patterns, which can help to extend the transmission distance of electromagnetic waves and improve the coverage of 5G millimeter waves, and can also provide uniform Visible light transmittance and prevent moire effect, so as to maintain good display quality.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.

10, 20, 30, 40, 50, 60, 70, 80: display device 110: element array substrate 120, 123, 128, 129, 130, 133, 138, 139: metasurface structure layer 129K, 129L, 129M, 129N, 129O: Collection of Metasurface Structure Groups 139K, 139L, 139M, 139N, 139O: Collection of Metasurface Structure Groups B1, B2, B3, C1, C2, C3: metasurface structures BM: light-shielding structure CF: Color filter structure CG: filter substrate CM: common electrode layer DL: driving circuit layer I1, I2: insulating layer LC: display element layer LD: light emitting element layer MS1, MS2: Metasurface Structure Group O1, O2, O3: opening P1, P2: polarizing layer US: Cover W1, W2: Spacing W3, W4: Length

FIG. 1A is a schematic partial cross-sectional view of a display device 10 according to an embodiment of the invention. FIG. 1B is a partial plan view of the metasurface structure layer 120 of the display device 10 shown in FIG. 1A . FIG. 1C is a partial plan view of the metasurface structure layer 130 of the display device 10 shown in FIG. 1A . FIG. 2 is a schematic partial cross-sectional view of a display device 20 according to an embodiment of the invention. FIG. 3A is a schematic partial cross-sectional view of a display device 30 according to an embodiment of the invention. FIG. 3B is a partial plan view of the metasurface structure layer 123 of the display device 30 shown in FIG. 3A . FIG. 3C is a partial plan view of the metasurface structure layer 133 of the display device 30 shown in FIG. 3A . FIG. 4 is a schematic partial cross-sectional view of a display device 40 according to an embodiment of the invention. FIG. 5 is a schematic partial cross-sectional view of a display device 50 according to an embodiment of the invention. FIG. 6 is a schematic partial cross-sectional view of a display device 60 according to an embodiment of the invention. FIG. 7 is a schematic partial cross-sectional view of a display device 70 according to an embodiment of the invention. FIG. 8 is a schematic partial cross-sectional view of a display device 80 according to an embodiment of the invention. FIG. 9 is a schematic diagram of a metasurface structure that can be used in embodiments of the present invention. FIG. 10A is a partial plan view of a metasurface structure layer 129 according to an embodiment of the present invention. FIG. 10B is a schematic partial plan view of a metasurface structure layer 139 according to an embodiment of the present invention.

10: Display device 110: element array substrate 120, 130: metasurface structure layer CG: filter substrate DL: driving circuit layer I1, I2: insulating layer W1, W2: Spacing W3, W4: Length

Claims (9)

A display device, comprising: an element array substrate; a first metasurface structure layer located on one side of the element array substrate, and including multiple sets of first metasurface structure groups; and a second metasurface structure layer located on the first metasurface structure layer Between a metasurface structure layer and the element array substrate, and including multiple sets of second metasurface structure groups, wherein the patterns of the first metasurface structure group and the second metasurface structure group are complementary, wherein the The first metasurface structure group and the second metasurface structure group respectively include a plurality of metasurface structures, and the plurality of metasurface structures have the same shape as each other and different sizes, distances or orientations from each other. The display device according to claim 1, further comprising a display element layer located between the second metasurface structure layer and the element array substrate. The display device according to claim 1, further comprising a filter substrate, wherein the first metasurface structure layer is located between the filter substrate and the second metasurface structure layer. The display device according to claim 1, further comprising a filter substrate, wherein the filter substrate is located between the first metasurface structure layer and the second metasurface structure layer. The display device according to claim 1, further comprising a filter substrate, wherein the second metasurface structure layer is located between the filter substrate and the first metasurface structure layer. The display device according to claim 1, wherein the plurality of first metasurface structure groups or the plurality of second metasurface structure groups are the same or different from each other. The display device according to claim 1, wherein the first set of metasurface structures and the second set of metasurface structures comprise transparent conductive materials. The display device according to claim 1, wherein the first metasurface structure group includes a plurality of first metasurface structures, the second metasurface structure group includes a plurality of second metasurface structures, and the second The metasurface structure has an opening corresponding to the first metasurface structure, wherein the ratio of the length of the first metasurface structure to the length of the opening corresponding to the second metasurface structure is 0.99-1.01. The display device according to claim 1, wherein the first metasurface structure group includes a plurality of first metasurface structures, the second metasurface structure group includes a plurality of second metasurface structures, and the second The metasurface structures have openings corresponding to the first metasurface structures, wherein the ratio of the spacing between the first metasurface structures to the spacing between the openings of the corresponding second metasurface structures is 0.99 -1.01.

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