Display module and display device

Abstract

A display module. The display module comprises a light modulation layer (30) arranged between a color film layer (40) and a display substrate (10). The light modulation layer (30) comprises a plurality of modulation sections (31); a modulation section (31) is arranged accordingly between a light-emitting section (14) and a color film section (41). The modulation section (31) comprises a modulation structure (315) and a transmission structure (313); the color film section (41) comprises a first region (41A) and a second region (41B), wherein an orthographic projection of the transmission structure (313) on the color film section (41) is located in the first region (41A).The second region (41B) is adjacent to a color film portion (41) having a different color, and an orthographic projection of the modulation structure (315) on the color film portion (41) is located in the second region (41B); the modulation structure (315) is used to converge the output light from the corresponding light-emitting portion (14).

Description

FIELD OF TECHNOLOGY

[0001] The present disclosure relates to the field of display technologies and, more particularly, to a display module and a display device. STATE OF THE ART

[0002] A display device typically comprises a display substrate and a color film layer for implementing color conversion. The display substrate comprises a plurality of light-emitting portions, and the color film layer comprises a plurality of color film portions, wherein a light-emitting portion is arranged corresponding to a color film portion, and adjacent color film portions have different colors. SUMMARY

[0003] In one aspect, a display module is provided. The display module comprises a display substrate, a color film layer, and a light modulation layer. The display substrate comprises a plurality of light-emitting portions. The color film layer is located on a light-exit side of the display substrate; wherein the color film layer comprises a plurality of color film portions; wherein the plurality of color film portions each cover the plurality of light-emitting portions; wherein the plurality of color film portions comprise at least two types of color film portions having different colors.The light modulation layer is arranged between the color film layer and the display substrate; wherein the light modulation layer comprises a plurality of modulation sections; wherein a modulation section is arranged correspondingly between a light-emitting section and a color film section; wherein the modulation section comprises a modulation structure and a transmission structure; wherein the color film section comprises a first region and a second region; wherein an orthographic projection of the transmission structure on the color film section is located in the first region, wherein the second region is adjacent to a color film section having a different color, wherein an orthographic projection of the modulation structure on the color film section is located in the second region, wherein the modulation structure is used to converge the output light from the corresponding light-emitting section.

[0004] In some embodiments, an orthographic projection of the transmission structure on the display substrate completely covers the corresponding light-emitting portion.

[0005] In some embodiments, the transmission structure comprises a vacuum layer.

[0006] In some embodiments, an orthographic projection of the modulation portion on the display substrate coincides with an orthographic projection of the corresponding color film portion on the display substrate.

[0007] In some embodiments, the modulation structure comprises a metasurface structure comprising a plurality of unit structures, the plurality of unit structures arranged in an array, the distances between centerlines of two adjacent unit structures being equal, and each unit structure having an equal height in a direction perpendicular to the display substrate.

[0008] In some embodiments, the plurality of (a majority of) unit structures are centrally symmetric.

[0009] In some embodiments, a material of the unit structure comprises silicon nitride.

[0010] In some embodiments, the metasurface structure further comprises an isolation structure disposed between the plurality of unit structures, wherein a refractive index of the unit structure is greater than a refractive index of the isolation structure.

[0011] In some embodiments, a difference between the refractive index of the unit structure and the refractive index of the isolation structure is in a value range of 1.03 to 1.3.

[0012] In some embodiments, the modulation structure comprises a first edge and a second edge arranged opposite each other, wherein the first edge is arranged near the transmission structure and the second edge is arranged away from the transmission structure; wherein a distance between the first edge and the second edge is L and satisfies the following formula: L=T2×tan θ; where L is the distance between the first edge and the second edge; T2 is a thickness of the color film portion corresponding to the modulation structure; and θ is an angle through which the modulation structure deflects light from the light-emitting portion, where θ = sin -1 (1 / n), where n is a refractive index of the color film portion corresponding to the modulation structure.

[0013] In some embodiments, any one of the unit structures has a different phase value, the unit structure including a first column extending in a third direction, the first column corresponding to any one of the unit structures having a different size; the third direction intersecting the display substrate.

[0014] In some embodiments, a phase value of the unit structure ranges from 0 to 2π(m-1) / m, where m is a positive integer.

[0015] In some embodiments, the first column is a cylinder and a radius r of the first column corresponds to any one of the unit structures that satisfies the following formula: neff=n12−(U(r,n2)λ2πr)2; where n eff is an equivalent refractive index corresponding to the unit structure, and φ=2πλneffH, where φ is a phase value corresponding to the unit structure, H is a height of the unit structure in a direction perpendicular to the display substrate, and λ is a wavelength of light from the light-emitting portion corresponding to the unit structure; U(r, n2) is a Bessel function expressed as r and n2, where r is the radius of the first pillar corresponding to the unit structure, and n2 is a refractive index of the unit structure; and n1 is a refractive index of the isolation structure.

[0016] In some embodiments, the coordinates of the first column corresponding to any of the unit structures satisfy the following formula: φ(x,y)=2πn2λ(x+y)sin θ; where n2 is the refractive index of the unit structure; λ is the wavelength of light from the light-emitting section corresponding to the unit structure; θ is an angle by which the unit structure deflects the light from the corresponding light-emitting section; x is a coordinate value of the unit structure on a first coordinate axis extending in a first direction; and y is a coordinate value of the unit structure on a second coordinate axis extending in a second direction, wherein a common origin of the first coordinate axis and the second coordinate axis is located at a center of the modulation section, wherein the first direction and the second direction are parallel to the display substrate, and the first direction and the second direction intersect.

[0017] In some embodiments, the plurality of (a plurality of) unit structures have equal phase values, the unit structure including a second column extending in a third direction, the second column corresponding to any one of the unit structures having an equal size; the third direction intersecting the display substrate.

[0018] In some embodiments, the display module further comprises an encapsulation layer and the light modulation layer is disposed between the encapsulation layer and the color film layer; wherein the second column satisfies the following formula: d(nin sin θin±nout sin θout)=mλ; where d is a distance between the centerlines of adjacent unit structures; n in is a refractive index of the encapsulation layer, and 0", an angle between the light from the light-emitting section corresponding to the unit structure and a normal; n out is a refractive index of the color film portion corresponding to the unit structure, and θ out is an angle between the light exiting the corresponding color film section and the normal; m is a coefficient and m=1; λ is a wavelength of the light from the light-emitting section corresponding to the unit structure.

[0019] In some embodiments, the ratio of the diameter of the second column to the distance between the centerlines of two adjacent unit structures is in a range of 0.3 to 0.6.

[0020] In some embodiments, the modulation structure is arranged around the transmission structure.

[0021] In some embodiments, the modulation structure comprises a first subsection, a second subsection, a third subsection, and a fourth subsection sequentially connected end-to-end; wherein the first subsection and the third subsection extend in a first direction and are arranged opposite each other in a second direction, wherein the second subsection and the fourth subsection extend in the second direction and are arranged opposite each other in the first direction.The first direction and the second direction are parallel to the display substrate, the first direction and the second direction intersecting each other; wherein a width of the first sub-portion in the second direction, a width of the third sub-portion in the second direction, a width of the second sub-portion in the first direction, and a width of the fourth sub-portion in the first direction are the same.

[0022] In another aspect, a display device is provided. The display device comprises the display module as described in any of the above embodiments. SHORT DESCRIPTION OF THE CHARACTERS

[0023] In order to more clearly describe technical solutions in the present disclosure, the attached drawings used in some embodiments of the present disclosure are briefly introduced below. Of course, the attached drawings to be described below are merely attached drawings of some embodiments of the present disclosure, and a person of ordinary skill in the art can obtain other drawings from these drawings. Furthermore, the attached drawings described below can be regarded as schematic representations, but do not impose limitations on the actual size of a product, an actual process of a method, and an actual timing of a signal to which the embodiments of the present disclosure refer. Fig. 1 is a block diagram showing the structure of a display device according to some embodiments; Fig. 2 is a structural diagram of a display module in the display device in Fig. 1; Fig. 3 is a structural diagram of a display module according to some embodiments in the related art; Fig. 4 is a structural diagram of a display module according to some other embodiments in the related art; Fig. 5 is a structural diagram of a display module according to some other embodiments in the related art; Fig. 6 is an enlarged partial view of an area F in Fig. 2; Fig. 7 is a top view of a modulation section according to some embodiments; Fig. 8 is a structural diagram showing an arrangement of color film sections according to some embodiments; Fig. 9 is a structural diagram of an optical wedge according to some embodiments; Fig. 10 is a structural diagram of a metasurface structure according to some embodiments; Fig. 11 is a plan view of a modulation section according to some other embodiments; Fig. 12 is a transmission diagram of a light path between a color film portion and its corresponding light-emitting portion according to some embodiments; Fig. 13 is a structural diagram of a unit structure in a metasurface structure according to some embodiments; Fig. 14 is a relationship curve of an equivalent refractive index of a first column to a duty cycle of the first column according to some embodiments; Fig. 15 is a structural diagram of two adjacent color film sections in a display module according to some embodiments; Fig. 16 is a brightness distribution diagram according to some embodiments before deflection of the exit light entering the adjacent color film section; Fig. 17 is a brightness distribution diagram according to some embodiments after deflection of the exit light entering the adjacent color film section; Fig. 18 is a structural diagram of a display module according to some other embodiments; Fig. 19 is a structural diagram of a modulation section according to some further embodiments; Fig. 20 is a plan view of a modulation section according to some further embodiments; and Fig. 21 is a structural diagram of a display module according to some further embodiments. DETAILED DESCRIPTION OF REVELATION

[0024] Technical solutions in some embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings. Of course, the described embodiments are only some, but not all, of the embodiments of the present disclosure. All other embodiments that a person of ordinary skill in the art can derive from the embodiments of the present disclosure are within the scope of the present disclosure.

[0025] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" and other forms thereof, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as inclusive and including, that is, "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" are intended to indicate that certain features, structures, materials, or properties related to the embodiments or examples 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 or example.Furthermore, the particular features, structures, materials, or properties described may be included in one or more embodiments or examples in any suitable manner.

[0026] Hereinafter, terms such as "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply the relative importance or number of the specified technical features. Thus, features defined as "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" or "the plurality of" means two or more, unless otherwise specified.

[0027] In the description of some embodiments, the terms "connected" and derivatives thereof may be used. For example, the term "connected" may be used in the description of some embodiments to indicate that two or more components are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the content described herein.

[0028] 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", and both include the following combinations of A, B and C: A only, B only, C only, 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.

[0029] The phrase “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0030] The term “suitable for” or “configured for” as used herein is an open and inclusive term that does not exclude devices that are suitable or configured to perform additional tasks or steps.

[0031] Furthermore, the use of the term “based on” is intended to be open and inclusive, since a process, step, calculation, or other action “based on” one or more of the specified conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those specified values.

[0032] The term "approximately", "substantially" or "approximately" as used herein includes a stated value and an average value within an acceptable range of deviation from a given value, where the acceptable range of deviation is determined by a person of ordinary skill in the art, taking into account the measurement in question and the errors inherent in the measurement of a particular quantity (i.e., the limitations of the measuring system).

[0033] The term "parallel" or "perpendicular," as used herein, includes a specified condition and a condition similar to the specified condition, where a range of the similar condition lies within an acceptable range of deviation, the acceptable range of deviation being determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with measuring a particular quantity (i.e., the limits of the measurement system). For example, the term "parallel" includes absolute parallelism and approximate parallelism, where an acceptable range of deviation of approximate parallelism may be a deviation within 5°; and the term "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation of approximate perpendicularity may also be a deviation within 5°.

[0034] It is understood that when it is stated that a layer or element is located on another layer or substrate, the layer or element may be located directly on the other layer or substrate, or there may be one or more intermediate layers between the layer or element and the other layer or substrate.

[0035] Exemplary embodiments are described herein with reference to sectional views and / or plan views as idealized exemplary accompanying drawings. In the accompanying drawings, the layer thicknesses and the sizes of the regions are shown enlarged for clarity. Therefore, deviations in the shapes compared to the accompanying drawings are conceivable, e.g., due to manufacturing technologies and / or tolerances. Therefore, the exemplary embodiments should not be understood as being limited to the shapes of the regions shown here, but should also include deviations in the shapes that are attributable, for example, to manufacturing.

[0036] Fig. 1 is a structural diagram of a display device according to some embodiments. As in Fig. 1, the display device 1000 is a product having a function of displaying images (including static images or dynamic images, where the dynamic images may be a video). The display device 1000 may be, for example, one of the following devices: a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigation device, a vehicle, a large-area wall, a household appliance, an information retrieval device (e.g., a business retrieval device for an e-government department, a bank, a hospital, an electricity company, or the like), a monitor, or the like. The display device 1000 includes a display module 100 as described in one of the following embodiments.

[0037] Fig. 2 is a structural diagram of a display module 100 in the display device 1000 in Fig. 1. The display module 100 may be an organic light-emitting diode (OLED) display panel, a quantum dot light-emitting diode (QLED) display panel, and a tiny LED display panel (including a mini-LED or a micro-LED, where the LED is a light-emitting diode). Of course, the display module 100 may also be used for other display devices, which is not limited in the present disclosure.

[0038] As in Fig. 2, the display module 100 includes a display substrate 10, an encapsulation layer 20, a color film layer 40, and a cover plate 50, wherein the display substrate 10 includes a substrate 11 and a circuit structure layer 12, wherein the circuit structure layer 12 is located on one side of the substrate 11.

[0039] The substrate 11 can be, for example, a flexible substrate or a rigid substrate. For example, if the substrate 11 is a flexible substrate, the material of the substrate 11 can be a material with high elasticity, such as dimethylsiloxane, polyimide (PI), polyethylene terephthalate (PET), or the like. For example, if the substrate 11 is a rigid substrate, the material of the substrate 11 can be glass or the like.

[0040] The substrate 11 may have a display region 111 and an edge region adjacent to the display region 111, and the display region 111 includes a plurality of sub-pixel regions 1113. The circuit structure layer 12 includes a plurality of pixel driver circuits 123, and one pixel driver circuit 123 is provided corresponding to one sub-pixel region 1113.

[0041] The display substrate 10 further includes a plurality of light-emitting sections 14. The plurality of light-emitting sections 14 are located on a side of the circuit structure layer 12 remote from the substrate 11, and one light-emitting section 14 is provided corresponding to a pixel driver circuit 123. The display substrate 10 may further include first electrodes 13, a pixel definition layer 16, and a second electrode layer 15. The first electrode 13 is located between the light-emitting section 14 and the circuit structure layer 12, and the second electrode layer 15 is located on a side of the light-emitting section 14 remote from the first electrode 13. The pixel definition layer 16 is located between adjacent light-emitting sections 14, and the pixel definition layer 16 is also located between the second electrode layer 15 and the circuit structure layer 12.By the above arrangement, each pixel driving circuit 123 can drive a corresponding light-emitting portion 14 to emit light.

[0042] The encapsulation layer 20 may be located between the display substrate 10 and the ink film layer 40. For example, the encapsulation layer 20 is located on a side of the second electrode layer 15 remote from the substrate 11. The material of the encapsulation layer 20 may, for example, comprise an inorganic and an organic material. For example, the material of the encapsulation layer 20 may comprise at least one of SiNx, SiO2, SiC, Al2O3, and ZnS; alternatively, the material of the encapsulation layer 20 may comprise resin or the like. The encapsulation layer 20 is used as a protective structure for the display substrate 10. In some embodiments, the thickness of the encapsulation layer 20 may range from 0.8 µm to 0.9 µm. For example, the thickness of the encapsulation layer 20 may be 0.8 µm, 0.85 µm, or 0.9 µm.

[0043] The color film layer 40 is located on a light-exiting side of the display substrate 10. For example, a color film portion 41 may be disposed between the encapsulation layer 20 and the cover plate 50. The light-exiting side of the display substrate 10 is a side of the substrate 11 on which the light-emitting portion 14 is disposed. In some embodiments, the thickness of the color film layer 40 may range from 1 to 1.4 µm. For example, the thickness of the encapsulation layer 20 may be 1 µm, 1.2 µm, or 1.4 µm.

[0044] The color film layer 40 includes a plurality of color film sections 41, and the plurality of color film sections 41 cover the plurality of light-emitting sections 14. For example, one color film section 41 is provided corresponding to one light-emitting section 14. Since each light-emitting section 14 is provided corresponding to a pixel driving circuit 123, after a pixel driving circuit 123 drives the corresponding light-emitting section 14 to emit light, the light emitted from the corresponding light-emitting section 14 passes through the corresponding color film section 41, so that the color film layer 40 can perform filtering.

[0045] The plurality of color film sections 41 include at least two types of color film sections 41 with different colors. For example, the plurality of color film sections 41 may include first color film sections 411, second color film sections 412, and third color film sections 413. For example, the first color film section 411 may be a red color film section 41, the second color film section 412 may be a green color film section 41, and the third color film section 413 may be a blue color film section 41. For example, the first color film sections 411, the second color film sections 412, and the third color film sections 413 may be alternately arranged so that the color film sections 41 of different colors are adjacent to each other. With the above arrangement, the output light emitted from the plurality of light-emitting sections 14 can pass through the color film sections 41 to display a predetermined image.

[0046] With further reference to Fig. 2, the display module 100 further comprises a cover plate 50. The cover plate 50 is located on a side of the ink film layer 40 remote from the display substrate 10, so that the cover plate 50 can fulfill a protective function. The cover plate 50 can comprise, for example, a cover plate 50 made of glass.

[0047] Fig. 3 is a structural diagram of a display module 90 according to some embodiments in the related art. As shown in Fig. As shown in Figure 3, a portion (e.g., exit light at a position A2 in the figure) of the exit light emitted from the light-emitting portion 14 (e.g., at a position B1 in the figure) enters a corresponding color film portion 41 (e.g., at a position B2 in the figure), and another portion (e.g., exit light at a position A1 in the figure) of the exit light enters a color film portion 41 adjacent to the corresponding color film portion 41 (e.g., at a position B3 in the figure). The color film portions 41 of different colors are adjacent to each other, so that crosstalk occurs between adjacent color film portions 41.

[0048] Fig. 4 is a structural diagram of a display module 90 according to some other embodiments in the related art. As shown in Fig. As shown in Figure 4, a black matrix 91 may be provided between adjacent color film sections 41, and the material of the black matrix 91 has a high light absorption rate to absorb a portion (e.g., at a position C1 in the figure) of the light from the light-emitting section 14 (e.g., at a position D1 in the figure). Thus, the light entering a color film section 41 adjacent to the corresponding color film section 41 (e.g., at a position D2 in the figure) is reduced, thereby reducing crosstalk between adjacent color film sections 41. For a display module 90 with high pixels per inch (PPI, the number of pixels per inch), the size of the color film section 41 is reduced accordingly, and the size of the black matrix 91 should be reduced accordingly.However, since the size of the black matrix 91 is limited by the precision of the fine metal mask (FMM), the size of the black matrix 91 is relatively large, resulting in a reduction in the amount of exit light from the color film portion 41.

[0049] Fig. 5 is a structural diagram of a display module 90 according to some further embodiments in the related art. As in Fig. As shown in Figure 5, a corresponding overlap layer 92 may be provided on a side of the color film portion 41 remote from the display substrate 10 (e.g., at a position E1 in the figure), and the corresponding overlap layer 92 (e.g., at a position E2 in the figure) and the adjacent color film portion 41 (e.g., at a position E3 in the figure) may have the same color. Filtering by the overlap layer 92 can reduce the influence of large-angle light between adjacent color film portions 41, thereby reducing crosstalk between adjacent color film portions 41. Due to the different light filtering requirements of the color film portions 41 of different colors, the widths of the overlap regions between the color film portions 41 of different colors and the corresponding overlap layers 92 may be different (e.g., E4, E5, and E6 have different widths in the figure).However, in order to ensure the reduction of the effect of crosstalk between adjacent color film sections 41, the overlap layer 92 has a relatively large width, which limits the further reduction of the size of the color film section 41.

[0050] In order to ensure the amount of light emitted from the color film section 41, the Fig. 5 typically adopts a large cavity long microcavity mode to cause an increase in the thickness of the ink film layer 40 and an increase in the angle of the light from the light-emitting portion 14, thereby causing a portion of the light from the corresponding light-emitting portion 14 to enter the adjacent ink film layer 40 and further causing a color shift in the display module 100.

[0051] In view of the above and with further reference to Fig. 2, in some embodiments of the present disclosure, a light modulation layer 30 is further included. The light modulation layer 30 is located between the color film layer 40 and the display substrate 10. For example, the light modulation layer 30 may be disposed between the encapsulation layer 20 and the color film layer 40.

[0052] The first direction X and the second direction Y are parallel to the display substrate 10, and the first direction X intersects the second direction Y. The third direction Z intersects the display substrate 10. For example, the first direction X is perpendicular to the second direction Y, and the third direction Z is perpendicular to the display substrate 10. The following describes only an example in which the first direction X is perpendicular to the second direction Y and the third direction Z is perpendicular to the display substrate 10.

[0053] The light modulation layer 30 includes a plurality of modulation sections 31, and a modulation section 31 is arranged between a light-emitting section 14 and a color film section 41, respectively. The modulation section 31 includes a modulation structure 315 and a transmission structure 313. For example, a modulation section 31 is arranged opposite a light-emitting section 14 along one side of the third direction Z, and a modulation section 31 is arranged corresponding to a color film section 41 along the other side of the third direction Z. With the above arrangement, the exit light from a light-emitting section 14 can pass through the corresponding modulation section 31 and then enter the corresponding color film section 41.

[0054] The transmission structure 313 can be used to transmit a portion of the output light from the corresponding light-emitting section 14 into the corresponding color film section 41. The modulation structure 315 can be adjacent to the transmission structure 313. By providing the transmission structure 313, it can be ensured that the output light from the light-emitting section 14 enters the corresponding color film section 41 through the transmission structure 313, thereby ensuring the amount of output light from the corresponding color film section 41.

[0055] Fig. 6 is an enlarged partial view of an area F in Fig. 2. As in Fig. 6, in some embodiments, an orthographic projection of the transmission structure 313 on the display substrate 10 completely covers the corresponding light-emitting portion 14. For example, the area of ​​the orthographic projection of the transmission structure 313 on the display substrate 10 is larger than the area of ​​the light-emitting portion 14, and the light-emitting portion 14 is located within the orthographic projection of the transmission structure 313 on the display substrate 10. The above arrangement can further ensure that the exit light from the light-emitting portion 14 exits through the corresponding transmission structure 313 into the corresponding color film portion 41, thereby further increasing the amount of exit light from the corresponding color film portion 41 and further improving the brightness of the display module 100.

[0056] Of course, in some other embodiments, the light-emitting portion 14 may further completely cover the orthographic projection of the corresponding transmission structure 313 on the display substrate 10. Alternatively, in some other embodiments, the orthographic projection of the transmission structure 313 on the display substrate 10 may coincide with the corresponding light-emitting portion 14. The embodiments of the present disclosure are not specifically limited thereto.

[0057] In some embodiments, the transmission structure 313 may include a vacuum layer. For example, during the manufacture of the modulation section 31, a vacuum layer may be formed in an area adjacent to the modulation structure 315 by vacuum deposition. By providing the vacuum layer, the exit light from the corresponding light-emitting section 14 is not deflected after entering the transmission structure 313, which is advantageous for further increasing the amount of light passing through the corresponding transmission structure 313, thereby further increasing the amount of exit light from the corresponding color film section 41 and further improving the brightness of the display module 100.

[0058] Of course, in some other embodiments, the material of the transmission structure 313 may also comprise another material with a low refractive index. The refractive index of the transmission structure 313 may range from 1.3 to 1.4. The refractive index of the transmission structure 313 may be, for example, 1.3, 1.35, or 1.4 to ensure the amount of light passing through the corresponding transmission structure 313 in the output light emitted by the light-emitting section 14, thereby ensuring the brightness of the display module 100.

[0059] Alternatively, the transmission structure 313 may be made of an appropriate material according to actual needs, which is not limited in some embodiments of the present disclosure.

[0060] As in Fig. As shown in Figure 6, the color film section 41 comprises a first region 41A and a second region 41B. The orthographic projection of the transmission structure 313 on the color film section 41 is located in the first region 41A. The second region 41B borders a color film section 41 with a different color. The orthographic projection of the modulation structure 315 on the color film section 41 is located in the second region 41B.

[0061] For example, since the orthographic projection of the transmission structure 313 on the color film portion 41 is located in the first region 41A, in an embodiment in which the orthographic projection of the transmission structure 313 on the display substrate 10 completely covers the corresponding light-emitting portion 14, the orthographic projection of the first region 41A on the display substrate 10 also completely covers the corresponding light-emitting portion 14. The above arrangement can ensure that the exit light from the light-emitting portion 14 passes through the corresponding transmission structure 313 and exits into the first region 41A of the corresponding color film portion 41, thereby increasing the amount of exit light from the corresponding color film portion 41 and further improving the brightness of the display module 100.

[0062] For example, the first region 41A and the second region 41B of the color film portion 41 are adjacent to each other. For example, the second region 41B can be arranged on one side of the first region 41A. Since the orthographic projection of the modulation structure 315 onto the color film portion 41 is located in the second region 41B, the modulation structure 315 can be arranged on one side of the transmission structure 313. With the above arrangement, a portion of the output light from the light-emitting portion 14 exits through the modulation structure 315 into the color film layer 40.

[0063] The modulation structure 315 is used to converge the exit light from the corresponding light-emitting section 14. For example, after the exit light enters the modulation structure 315 at a first angle S1, the modulation structure 315 converges the exit light so that the exit light enters the ink film layer 40 at a second angle S2. The first angle S1 is larger than the second angle S2, where the first angle S1 is an angle between the exit light from the light-emitting section 14 and the third direction Z, and the second angle S2 is an angle between the converged exit light and the third direction Z. By the above arrangement, it may be possible to reduce the exit light entering the adjacent ink film section 41, thereby reducing crosstalk between the adjacent ink film sections 41.In some embodiments, the modulation structure 315 may, for example, comprise a microlens to converge the exit light from the corresponding light-emitting portion 14.

[0064] In summary, in the display module 100 provided by some embodiments of the present disclosure, the light modulation layer 30 is disposed between the color film layer 40 and the display substrate 10. The light modulation layer 30 includes a plurality of modulation sections 31, wherein a modulation section 31 is provided between a light-emitting section 14 and a color film section 41, respectively. The modulation section 31 includes a modulation structure 315 and a transmission structure 313. The color film section 41 includes a first region 41A and a second region 41B, and an orthographic projection of the transmission structure 313 on the color film section 41 is located in the first region 41A.The above arrangement ensures that the output light from the light-emitting portion 14 exits through the corresponding transmission structure 313 into the first region 41A of the corresponding color film portion 41, thereby increasing the amount of output light from the corresponding color film portion 41 and further improving the brightness of the display mode 100. The second region 41B is adjacent to a color film portion 41 having a different color, and an orthographic projection of the modulation structure 315 on the color film portion 41 is located in the second region 41B. The modulation structure 315 is used to converge the output light from the corresponding light-emitting portion 14. With the above arrangement, a portion of the output light from the light-emitting portion 14 enters the modulation structure 315.The modulation structure 315 converges the output light, which has a beneficial effect on increasing the output light entering the second region 41B of the corresponding color film section 41 and reducing the output light entering a color film section 41 adjacent to the corresponding color film section 41. Thus, crosstalk between the adjacent color film sections 41 can be reduced, which contributes to improving the display contrast of the display module 100.

[0065] Furthermore, the above arrangement is advantageous to increase the exit light entering the second region 41B of the corresponding color film portion 41 and reduce the exit light entering a color film portion 41 adjacent to the corresponding color film portion 41, and is also advantageous to improve the color shift between adjacent color film portions 41.

[0066] Fig. 7 is a top view of a modulation section 31 according to some embodiments. In combination with Fig. 6 and as in Fig. As shown in Figure 7, the modulation structure 315 may be arranged around the transmission structure 313. For example, the modulation structure 315 may be arranged along a circumferential direction of the transmission structure 313. For example, the cross section of the transmission structure 313 may have the shape of a rectangle, the cross section of the modulation structure 315 may have the shape of a ring, and the transmission structure 313 may be located in the annular space of the modulation structure 315.

[0067] It is understood that the light-emitting section 14 is a Lambertian light-emitting section, ie, the radiation angle of the exit light may range from -60° to +60° (ie, with ± 60°). Here, the "angle" refers to an angle between the exit light and the third direction Z. With reference to Fig. 6, in the exit light from the light-emitting portion 14, a large-angle exit light is likely to enter a color film portion 41 adjacent to the corresponding color film portion 41 after transmission through the encapsulation layer 20, thereby forming the crosstalk between adjacent color film portions 41.

[0068] With the above arrangement, for the same color film portion 41, it is advantageous to dispose the modulation structure 315 far from the center of the color film portion 41 relative to the transmission structure 313 to allow large-angle exit light to enter the modulation structure 315, so that the modulation structure 315 converges the large-angle exit light, that is, the angle of the converged exit light is reduced. By converging the exit light at a large angle, it may be advantageous to further increase the exit light entering the second region 41B of the corresponding color film portion 41 and further reduce the exit light entering a color film portion 41 adjacent to the corresponding color film portion 41, thereby reducing crosstalk between adjacent color film portions 41, which is beneficial for improving the contrast of the display module 100.

[0069] In some embodiments, the color film layer 40 may include a plurality of color film sections 41 arranged in an array, and any two adjacent color film sections 41 have different colors. Fig. 8 is a structural diagram showing an arrangement of color film sections 41 according to some embodiments. As in Fig. As shown in Figure 8, a color film portion 41 located in the center of the figure may be a first color film portion 411, and color film portions 41 adjacent to the first color film portion 411 may include second color film portions 412 and third color film portions 413. The second color film portions 412 and the third color film portions 413 are alternately arranged along the circumferential direction of the first color film portion 411. Crosstalk is likely to occur between the first color film portion 411 and any color film portion 41 adjacent to the first color film portion 411, that is, crosstalk is likely to occur in the annular region M in the figure. The modulation structure 315 is arranged around the transmission structure 313, and crosstalk between any two adjacent color film portions 41 can be reduced, thereby further improving the contrast of the display module 100.

[0070] In some other embodiments, the modulation structures 315 may be arranged at intervals along the circumferential direction of the transmission structure 313. For example, the cross-section of the transmission structure 313 may have the shape of a rectangle, and the modulation structures 315 may be arranged along any two adjacent lateral edges of the transmission structure 313. Alternatively, the modulation structures 315 may be arranged along any three adjacent lateral edges of the transmission structure 313. Alternatively, in some other embodiments, the modulation structures 315 may be arranged on one side of the transmission structure 313. Of course, the positional arrangement of the modulation structure 315 and the transmission structure 313 may be determined according to actual requirements, which is not specifically limited in some embodiments of the present disclosure.

[0071] In some embodiments, with further reference to Fig. 7, the modulation structure 315 may include a first subsection 315A, a second subsection 315B, a third subsection 315C, and a fourth subsection 315D, which are sequentially connected end-to-end. The first subsection 315A and the third subsection 315C extend in the first direction X and are arranged opposite each other in the second direction Y. The second subsection 315B and the fourth subsection 315D extend in the second direction Y and are arranged opposite each other in the first direction X. For example, the cross-sectional shapes of the first subsection 315A, the second subsection 315B, the third subsection 315C, and the fourth subsection 315D are all rectangular.The first subsection 315A is located between the second subsection 315B and the fourth subsection 315D, and the first subsection 315A is adjacent to each of the second subsection 315B and the fourth subsection 315D. The third subsection 315C is located between the second subsection 315B and the fourth subsection 315D, and the third subsection 315C is adjacent to each of the second subsection 315B and the fourth subsection 315D. Thus, the first subsection 315A, the second subsection 315B, the third subsection 315C, and the fourth subsection 315D are sequentially connected end-to-end.

[0072] A width of the first subsection 315A in the second direction Y, a width of the third subsection 315C in the second direction Y, a width of the second subsection 315B in the first direction X, and a width of the fourth subsection 315D in the first direction X may be the same. For example, the width of the first subsection 315A in the second direction Y may be a first distance h1, the width of the second subsection 315B in the first direction X may be a second distance h2, the width of the third subsection 315C in the second direction Y may be a third distance h3, and the width of the fourth subsection 315D in the first direction X may be a fourth distance h4. The first distance h1, the second distance h2, the third distance h3, and the fourth distance h4 may all be the same.The above arrangement is also advantageous for improving the regularity of the modulation structure 315 and further improving the regularity of the modulation section 31, and is advantageous for reducing the manufacturing difficulty of the light modulation layer 30 and improving the manufacturing efficiency of the light modulation layer 30.

[0073] It is noted that the term "equal" encompasses both absolute equality and approximate equality. Due to certain uncontrollable errors (e.g., errors in the manufacturing process, equipment accuracy, measurement errors, or the like), the width of the first subsection 315A in the second direction Y, the width of the third subsection 315C in the second direction Y, the width of the second subsection 315B in the first direction X, and the width of the fourth subsection 315D in the first direction X can be considered approximately equal if the difference between any two widths is within an acceptable deviation range. The acceptable deviation range can be 30%, 20%, 10%, or 5% of either width.

[0074] Of course, in some other embodiments, the width of the first subsection 315A in the second direction Y, the width of the third subsection 315C in the second direction Y, the width of the second subsection 315B in the first direction X, and the width of the fourth subsection 315D in the first direction X may be adjusted according to actual needs, respectively. For example, the width of the first subsection 315A in the second direction Y, the width of the third subsection 315C in the second direction Y, the width of the second subsection 315B in the first direction X, and the width of the fourth subsection 315D in the first direction X may be different from each other, which is not limited in some embodiments of the present disclosure.

[0075] In some embodiments, an orthographic projection of the modulation section 31 on the substrate coincides with an orthographic projection of the corresponding color film section 41 on the substrate. For example, the cross-sectional shape of the modulation section 31 is the same as the cross-sectional shape of the color film section 41, and an edge of the modulation section 31 is aligned with an edge of the corresponding color film section 41, i.e., an edge of the modulation structure 315 in the modulation section 31 is aligned with the edge of the corresponding color film section 41.With the above arrangement, in any two adjacent color film sections 41, the corresponding two modulation structures 315 are adjacent to each other, so that the exit light can be further converged at a large angle, which is advantageous for further increasing the exit light entering the second region 41B of the corresponding color film section 41 and further reducing the exit light entering a color film section 41 adjacent to the corresponding color film section 41. Thus, crosstalk between adjacent color film sections 41 can be reduced, contributing to improving the display contrast of the display module 100.

[0076] It should be noted that the term "coincidence" encompasses absolute coincidence and approximate coincidence. That is, a fluctuation range of a distance between the orthographic projection of the modulation section 31 on the substrate and the orthographic projection of the corresponding color film section 41 on the substrate does not exceed the error threshold, and it can also be assumed that the edges of the two orthographic projections "coincide" relatively. The present disclosure does not limit the specific value of the error threshold, and it is guaranteed that the distance is within the range of the error threshold.

[0077] Of course, in some other embodiments, the plurality of color film sections 41 may be arranged differently, and the position of the modulation structure 315 in the modulation section 31 may be adjusted accordingly. For example, the first color film section 411, the second color film section 412, and the third color film section 413 may be arranged alternately next to one another in the first direction X. Accordingly, the modulation structure 315 in the modulation section 31 may be located on both sides of the transmission structure 313 in the first direction X.

[0078] Fig. 9 is a structural diagram of a metasurface structure 315E according to some embodiments. As in Fig. As shown in Figure 9, in some embodiments, the modulation structure 315 may comprise a metasurface structure. The metasurface structure 315E comprises a plurality of unit structures 3153, and the plurality of unit structures 3153 are arranged in an array. The distances between centerlines of two adjacent unit structures 3153 are equal, and each unit structure 3153 has the same height in a direction perpendicular to the display substrate 10. The third direction Z is perpendicular to the display substrate 10.

[0079] For example, the plurality of unit structures 3153 may be arranged at intervals in a direction parallel to the display substrate 10, and the extending directions of the plurality of unit structures 3153 are all perpendicular to the display substrate 10. The unit structure 3153 may be on the order of a small wavelength, and the electromagnetic wave modulation of the metasurface structure 315E may be realized by an arrangement configuration of the unit structures.

[0080] Fig. 10 is a structural diagram of an optical wedge 93 according to some embodiments. As shown in Fig. 10, the optical wedge 93 is a prism with a very small apex angle (generally less than 1 / 10 radian), and the optical wedge 93 may also be referred to as a wedge mirror. When the light enters the optical wedge 93 perpendicularly or nearly perpendicularly, the optical wedge 93 may deflect the light. With further reference to Fig. 9, the light modulation principle of the metasurface structure 315E is similar to that of the optical wedge 93. For example, the metasurface structure 315E can also deflect the perpendicularly or nearly perpendicularly entering light and exiting it. That is, when the exit light from the light-emitting portion 14 enters the metasurface structure 315E at a relatively large angle, the metasurface structure 315E deflects the exit light, that is, the metasurface structure converges the exit light, and the converged exit light can exit at a relatively small angle.

[0081] For example, for the visible light wavelength band, the distance between the center lines of any two adjacent unit structures 3153 may be a periodic pitch P. The periodic pitch P may be equal to half the wavelength of the output light from the light-emitting portion 14, so that the size of the unit structure 3153 may be on the order of half a wavelength, and the unit structure 3153 may exhibit a discretized phase modulation effect. By arranging the plurality of unit structures 3153, the light beam modulation effect of the metasurface structure 315E can be realized on the order of hundreds of nanometers.

[0082] The term "equal" here refers to absolute equality and approximate equality. That is, a fluctuation range of a difference between the distance between the center lines of any two adjacent unit structures 3153 and half the wavelength of the output light from the light-emitting portion 41 does not exceed the error threshold. The present disclosure does not limit the specific value of the error threshold, and it is guaranteed that the distance is within the range of the error threshold.

[0083] As described in the above embodiments, in a high-PPI display module 100, the size of the color film portion 41 is reduced accordingly. For example, the size of the color film portion 41 can be reduced to the order of micrometers, and accordingly, the size of the corresponding modulation structure 315 can be reduced to the order of hundreds of nanometers. The above arrangement is advantageous for reducing crosstalk between adjacent pixels in the high-PPI display module 100.

[0084] Fig. 11 is a top view of another metasurface structure 315E according to some embodiments. Referring to Fig. 11, the plurality of unit structures 3153 may be centrally symmetric. As described in the above embodiments, the modulation structure 315 may be arranged around the transmission structure 313, and the modulation structure 315 includes a plurality of unit structures 3153, so that the plurality of unit structures 3153 may be arranged around the transmission structure 313. As shown in the figure, the plurality of unit structures 3153 are arranged centrally symmetrically around a center point O of the modulation structure 315. Since the size of the unit structures 3153 depends on a phase value generated by the unit structure 3153, the metasurface structure 315E can have a corresponding phase expression value by arranging the unit structures 3153, that is, the metasurface structure 315E has a desired light beam modulation effect.The above arrangement is advantageous to equally improve the crosstalk effect between any two adjacent color film sections 41, and further advantageous to achieve a uniform display effect of the display module 100.

[0085] Here, the term "centrally symmetric" means that the plurality of unit structures 3153 can include absolute central symmetry and approximate central symmetry. Approximate central symmetry can be understood as meaning that an overall structure of the plurality of unit structures 3153 has a tendency toward symmetry, and that there are changes in a part of the plurality of unit structures 3153. For example, as in Fig. As shown in Figure 11, in a direction from an edge of the modulation structure 315 to a center of the modulation structure 315 (i.e., an X' direction in the figure), the sizes of the plurality of unit structures 3153 increase from a small value to a maximum value and then decrease from the maximum value to a minimum value, so that the overall structure of the plurality of unit structures 3153 has a tendency toward symmetry. There may be a difference between the sizes of two unit structures 3153 that have a tendency toward symmetry (e.g., the unit structures 3153 at positions F1 and F2 in the figure), and a fluctuation range of the difference does not exceed the error threshold. The present disclosure does not limit the specific value of the error threshold, and it is guaranteed that the distance is within the range of the error threshold.

[0086] In some embodiments, a material of the unit structure 3153 may comprise silicon nitride. Here, the term "silicon nitride" means and includes a compound comprising silicon atom(s) and nitrogen atom(s). Silicon nitride may comprise silicon and nitrogen in a stoichiometric number (e.g., Si3N4) or silicon and nitrogen in a non-stoichiometric number (e.g., SiNx).

[0087] With the above arrangement, the output light from the light-emitting portion 14 can be deflected by the unit structures 3153, so that the unit structures 3153 converge the output light from the light-emitting portion 14. That is, the modulation structure 315 can converge the output light, which is advantageous for increasing the output light entering the corresponding color film portion 41 and reducing the output light entering a color film portion 41 adjacent to the corresponding color film portion 41. Thus, crosstalk between adjacent color film portions 41 can be reduced, contributing to improving the display contrast of the display mode 100.

[0088] With further reference to Fig. 11 and in connection with Fig. 9, the metasurface structure 315E further comprises an isolation structure 3155, and the isolation structure 3155 is located between the plurality of unit structures 3153. The refractive index of the unit structure 3153 is greater than the refractive index of the isolation structure 3155. The isolation structure 3155 may, for example, include a solid isolation material; e.g., the isolation structure 3155 may include an adhesive material. By providing the isolation structure 3155, the plurality of unit structures 3153 may be isolated from each other. Of course, in some other embodiments, the material of the isolation structure 3155 may be a material capable of providing isolation between the unit structures 3153.

[0089] In some embodiments, a difference between the refractive index of the unit structure 3153 and the refractive index of the isolation structure 3155 ranges from 1.03 to 1.3. For example, the difference between the refractive index of the unit structure 3153 and the refractive index of the isolation structure 3155 may be 1.03, 1.2, or 1.3. In the embodiment in which the isolation structure 3155 is an adhesive material, the refractive index of the isolation structure 3155 may range from 1.3 to 1.4. For example, the refractive index of the isolation structure 3155 may be 1.3, 1.35, or 1.4.Since the refractive index of the unit structure 3153 may be larger than the refractive index of the isolation structure 3155, and the difference between the refractive index of the unit structure 3153 and the refractive index of the isolation structure 3155 ranges from 1.03 to 1.3, the refractive index of the unit structure 3153 may range from 2.33 to 2.7. For example, the refractive index of the unit structure 3153 may be 2.33, 2.4, 2.5, 2.6, or 2.7. The difference between the refractive index of the unit structure 3153 and the refractive index of the isolation structure 3155 may approach 1.03, which is beneficial for ensuring the phase expression of the unit structure 3153 and further beneficial for realizing the modulation effect of the modulation structure 315.The difference between the refractive index of the unit structure 3153 and the refractive index of the isolation structure 3155 can approach 1.3, which is advantageous for improving the phase retardation effect of the unit structure 3153 and further increasing the angle of the exit light deflected by the unit structure 3153.

[0090] Of course, the difference between the refractive index of the unit structure 3153 and the refractive index of the isolation structure 3155 may be greater than 1.3 to further improve the phase retardation effect of the unit structure 3153 and further increase the angle of the exit light deflected by the unit structure 3153.

[0091] In summary, the above arrangement is advantageous for the unit structures 3153 to have an appropriate phase expression value, that is, for the metasurface structure 315E to have the required light beam modulation effect. As a result, the modulation structure 315 can converge the output light, which is advantageous for increasing the output light entering the corresponding color film portion 41 and reducing the output light entering a color film portion 41 adjacent to the corresponding color film portion 41. Thus, crosstalk between adjacent color film portions 41 can be reduced, contributing to improving the display contrast of the display mode 100.

[0092] In some examples, the material of the isolation structure 3155 may be the same as that of the transmission structure 313. For example, the material of the isolation structure 3155 and the material of the transmission structure 313 may be adhesive material. Alternatively, the isolation structure 3155 and the transmission structure 313 may comprise vacuum layers. The material of the isolation structure 3155 is the same as that of the transmission structure 313, so that the isolation structure 3155 and the transmission structure 313 are manufactured synchronously, which is advantageous for reducing the manufacturing difficulty of the light modulation layer 30 and further improving the manufacturing efficiency of the display module 100.

[0093] With further reference to Fig. 11, the modulation structure 315 may include a first edge 315A1 and a second edge 315A2 arranged opposite one another, with the first edge 315A1 being provided near the transmission structure 313 and the second edge 315A2 being provided away from the transmission structure 313. As described in the above embodiments, the modulation structure 315 may include the first subsection 315A, the second subsection 315B, the third subsection 315C, and the fourth subsection 315D, which are sequentially connected end-to-end. In some embodiments, the first edge 315A1 and the second edge 315A2 may be arranged in any of the first subsection 315A, the second subsection 315B, the third subsection 315C, and the fourth subsection 315D.

[0094] Using the first subsection 315A as an example, the positions of the first edge 315A1 and the second edge 315A2 in the first subsection 315A are described below. The cross-sectional shape of the first subsection 315A may be a rectangle, for example. The first subsection 315A may include the first edge 315A1, the second edge 315A2, a third edge 315A3, and a fourth edge 315A4. The first edge 315A1 and the second edge 315A2 are arranged opposite each other, and the third edge 315A3 and the fourth edge 315A4 are arranged opposite each other. An edge of the first subsection 315A near the transmission structure 313 may be the first edge 315A1, an edge of the first subsection 315A remote from the transmission structure 313 may be the second edge 315A2.An edge of the first subsection 315A that is adjacent to the fourth subsection 315D is the third edge 315A3, and the third edge 315A3 is also adjacent to the first edge 315A1 and the second edge 315A2, respectively. An edge of the first subsection 315A that is adjacent to the second subsection 315B is the fourth edge 315A4, and the fourth edge 315A4 is adjacent to the first edge 315A1 and the second edge 315A2, respectively. A distance L between the first edge 315A1 and the second edge 315A2 is a width of the first subsection 315A in the second direction Y, that is, the first distance h1.

[0095] As described in the above embodiments, the first distance h1, the second distance h2, the third distance h3, and the fourth distance h4 may all be the same. The distance L between the first edge 315A1 and the second edge 315A2 may be any of the first distance h1, the second distance h2, the third distance h3, and the fourth distance h4.

[0096] In some embodiments, the distance L between the first edge 315A1 and the second edge 315A2 may satisfy the following formula (1): L=T2×tan θ;

[0097] In formula (1), L is the distance between the first edge 315A1 and the second edge 315A2.

[0098] Fig. 12 is a transmission diagram of a light path between a color film portion 41 and its corresponding light-emitting portion 14 according to some embodiments. As shown in Fig. 12, in formula (1), T2 is the thickness of a color film portion 41 corresponding to the modulation structure 315; and θ is an angle by which the modulation structure 315 deflects the light from the light-emitting portion 14, where θ = sin -1 (1 / n), where n is a refractive index of the color film portion 41 corresponding to the modulation structure 315.

[0099] With reference to Fig. 12, the angle θ by which the modulation structure 315 deflects the light from the light-emitting section 14 refers to an angle between the exit light from the light-emitting section 14 and the exit light converged by the modulation structure 315.

[0100] With reference to Fig. 12, it is understood that the crosstalk between adjacent color film sections 41 is mainly influenced by the width W1 of the light-emitting section 14 and the width W2 of the color film section 41. For example, as the width W2 of the color film section 41 decreases and the width W1 of the light-emitting section 14 increases, the exit light entering the adjacent color film section 41 increases, resulting in an increase in the crosstalk between the adjacent color film sections 41.

[0101] With the above arrangement, the angle by which the modulation structure 315 deflects the light from the light-emitting portion 14 is a total reflection angle of the color film portion 41. The distance between the first edge 315A1 and the second edge 315A2 is determined according to the parameters of the color film portion 41, which is advantageous for further increasing the output light entering the corresponding color film portion 41 and reducing the output light entering a color film portion 41 adjacent to the corresponding color film portion 41. Thus, crosstalk between adjacent color film portions 41 is reduced, contributing to improving the display contrast of the display mode 100.

[0102] As described in the above embodiments, the color film sections 41 include the first color film sections 411, the second color film sections 412, and the third color film sections 413 with different colors. In some embodiments, the refractive indices corresponding to the first color film sections 411, the second color film sections 412, and the third color film sections 413 are all different, that is, the angles by which the corresponding modulation structures 315 deflect the light from the light-emitting section 14 are all different. In the color film sections 41 with different colors, the distances L between the first edges 315A1 and the second edges 315A2 in the corresponding modulation structures 315 are also all different.

[0103] With further reference to Fig. 11, any one of the unit structures 3153 may have a different phase value, and the unit structure 3153 may include a first column extending in the third direction Z, the first column corresponding to any one of the unit structures 3153 having a different size. By providing a plurality of unit structures 3153 with different phase values, the modulation structure 315 has the required light modulation capability. As described in the above embodiments, the heights of the unit structures 3153 in the direction perpendicular to the display substrate 10, that is, the pitches of the plurality of first columns 3153A in the third direction Z, are all the same.

[0104] For example, if the distance between the center lines of any two adjacent unit structures 3153 is 250 nm, the pitch of the first pillar 3153A in the third direction Z may be 850 nm, and the diameter of the first pillar 3153A may be in the range of 94 nm to 218 nm.

[0105] In some embodiments, the phase value of the unit structure 3153 may be in a value range from 0 to 2π(m-1) / m, where m is a positive integer. For example, 8 unit structures 3153 with different phase values ​​may be selected, i.e., m may be 8. The phase values ​​of the 8 unit structures may be evenly distributed within the value range. The phase values ​​of the unit structures 3153 may include 0, π / 4, π / 2, 3π / 4, π, 5π / 4, 3π / 2, and 7π / 4. By selecting the range of the phase value of the unit structure 3153, the modulation structure 315 can express the phase value within the corresponding range, that is, the value range of the phase value expressed by the modulation structure 315 is 0 to 2π, to realize a two-dimensional modulation characteristic of the modulation structure 315. As a result, the modulation structure 315 can perform a phase delay of the corresponding light beam, that is,The modulation structure 315 has the capability of light beam modulation. The larger the number of phase values ​​of the selected unit structures 3153, that is, the larger m, the more accurate the phase value expressed by the modulation structure 315.

[0106] At the same time, the phase values ​​of the plurality of unit structures may be evenly distributed within the value range so that the phase value can be expressed by the modulation structure 315.

[0107] In some embodiments, the plurality of light-emitting sections 14 are each configured to emit white light. The plurality of unit structures 3153 each perform phase modulation on white light, so that the modulation structure 315 has a modulation effect on white light. The periodic pitch P may be equal to half the wavelength of the white light.

[0108] The term "equal" here can encompass both absolute equality and approximate equality. This means that, due to certain uncontrollable errors (e.g., errors in the manufacturing process, instrumentation accuracy, measurement errors, or similar), a difference between the periodic spacing P and half the wavelength of white light can be considered approximately equal within an acceptable deviation range. The acceptable deviation range can be 30%, 20%, 10%, or 5% of this.

[0109] The design process of the size and position of the unit structure 3153 in the embodiments in which the plurality of light-emitting portions 14 are each configured to emit white light will be briefly described below.

[0110] Fig. 13 is a structural diagram of a unit structure 3153 in a metasurface structure 315E according to some embodiments. As in Fig. As shown in Figure 13, the first column 3153A may be a cylinder. As described in the above embodiments, each unit structure 3153 has a different phase value, and a first column 3153A corresponding to any unit structure 3153 has a different size, that is, the first column 3153A corresponding to any unit structure 3153 has a different radius.

[0111] Of course, in some other embodiments, the first column 3153A may be a prism or a column with a different cross-sectional shape. This is not specifically limited by some embodiments of the present disclosure.

[0112] In some examples, after selecting the value range of the unit structures 3153, each first column 3153A has a corresponding phase value. Based on the corresponding phase value of the first column 3153A, the corresponding radius of the first column 3153A can be calculated. The radius r of the first column 3153A corresponding to any unit structure 3153 satisfies the following formula (2): neff=n12−(U(r,n2)λ2πr)2

[0113] In formula (2) n eff an equivalent refractive index corresponding to the unit structure 3153. The equivalent refractive index n eff can satisfy the following formula (3): φ=2πλneffH;

[0114] In formula (3), φ is a phase value corresponding to the unit structure 3153, H is a height of the unit structure 3153 in the third direction Z, and λ is a wavelength of the light from the light-emitting section 14 corresponding to the unit structure 3153.

[0115] Since the light-emitting section 14 is configured to emit white light, the wavelength of the light from the light-emitting section 14 corresponding to the unit structure 3153 can be the wavelength of white light, so that the modulation section 31 can perform modulation to white light.

[0116] The height H of the unit structure 3153 in the third direction Z can be determined depending on a maximum phase value of the unit structure 3153. For example, if the phase value of the unit structure 3153 is 2π, i.e., φ = 2π, then H = λ / n eff . The maximum refractive index n max the unit structure 3153 can be considered as n eff , to obtain a first height H1 of the unit structure 3153 in the third direction Z, ie H1 = λ / n max. The above arrangement enables a phase delay of the corresponding light beam by the modulation structure 315, that is, the modulation structure 315 has the capability of light modulation.

[0117] Of course, in some other embodiments, the height H of the unit structure 3153 in the third direction Z may be determined according to other phase values ​​and equivalent refractive index values. For example, the height H of the unit structure 3153 in the third direction Z may be greater than the first height H1.

[0118] In formula (2) U(r, n2) is a Bessel function which is r and n2, where r is the radius of the first pillar 3153A corresponding to the unit structure 3153, and n2 is a refractive index of the unit structure 3153.

[0119] In formula (2), n1 is a refractive index of the isolation structure 3155.

[0120] In summary, the radius of the first pillar 3153A corresponding to the unit structure 3153 and the equivalent refractive index of the first pillar 3153A corresponding to the unit structure 3153 can be calculated according to the phase value of the unit structure 3153 by Formula (2) and Formula (3).

[0121] It is understood that the duty cycles of the plurality of unit structures 3153 are all different because the radii of the plurality of first columns 3153A are all different. Here, the duty cycle refers to the ratio between the diameter of the first column 3153A and the periodic pitch P. The periodic pitch P is the distance between the center lines of two adjacent unit structures 3153, that is, the distance between two adjacent first columns 3153A. A maximum value D maxof the diameter of the first column 3153A is equal to the periodic pitch P, that is, in a case where the diameter of the first column 3153A is the maximum value D max is, is D max / P = 1. Therefore, the duty cycle of the first column 3153A is 1.

[0122] Fig. 14 is a relationship curve of an equivalent refractive index of a first column 3153A to a duty cycle of the first column 3153A according to some embodiments. As in Fig. 14, since the diameter D of the first column 3153A is equal to the radius r of the first column 3153A multiplied by 2, the relationship curve of the equivalent refractive index n eff of the first column 3153A to the duty cycle of the first column 3153A can be obtained by formula (2) and formula (3).

[0123] In some other examples, the equivalent refractive index n effof the first column 3153A according to the phase value of the unit structure 3153 can be calculated by formula (3). The corresponding duty cycle of the first column 3153A is determined by looking up the relationship curve of the equivalent refractive index n eff of the first column 3153A to the duty cycle of the first column 3153A according to the equivalent refractive index n eff of the first column 3153A, and then the radius of the first column 3153A is obtained.

[0124] In some embodiments, as in Fig. As shown in Figure 11, corresponding coordinate values ​​of the unit structure 3153 can be determined according to the phase value of the unit structure 3153, that is, the position of the unit structure 3153 in the modulation structure 315 can be determined. The coordinates of the first column 3153A corresponding to any unit structure 3153 can satisfy the following formula (4): φ(x,y)=2πn2λ(x+y)sin θ;

[0125] In formula (4), n2 is the refractive index of the unit structure 3153, and λ is the wavelength of the light from the light-emitting portion 14 corresponding to the unit structure 3153. Since the light-emitting portion 14 is configured to emit white light, the wavelength of the light from the light-emitting portion 14 corresponding to the unit structure 3153 can be the wavelength of white light.

[0126] In formula (4) and with reference to Fig. 12, θ is the angle by which the unit structure 3153 deflects the light from the corresponding light-emitting portion 14. Since the light-emitting portion 14 is configured to emit white light, the wavelength of the light from the light-emitting portion 14 corresponding to the unit structure 3153 can be the wavelength of white light.

[0127] In formula (4) and with reference to Fig. 11, x is a coordinate value of the unit structure 3153 on a first coordinate axis extending in the first direction X; y is a coordinate value of the unit structure 3153 on a second coordinate axis extending in the second direction Y. A common origin of the first coordinate axis and the second coordinate axis is located at a center point of the modulation section 31. For example, the center point of the modulation section 31 is the center point O in the figure.

[0128] In summary, during the design and arrangement of the plurality of unit structures 3153 in the modulation section 31, a phase value within the value range of the phase value of the unit structure 3153 can be selected for each unit structure 3153. The corresponding equivalent refractive index and radius of the unit structure 3153 can be obtained by formula (2) and formula (3) from the corresponding phase value to obtain the size of the unit structure 3153. Furthermore, the corresponding coordinates of the unit structure 3153 are obtained by formula (4) from the corresponding phase value.Similarly, the sizes and positions of the plurality of unit structures 3153 can be designed to form the corresponding modulation structure 315 and achieve the corresponding light beam modulation effect, thereby reducing the exit light entering a color film portion 41 adjacent to the corresponding color film portion 41. As a result, crosstalk between adjacent color film portions 41 can be reduced, which is beneficial for improving the display contrast of the display module 100.

[0129] Fig. 15 is a structural diagram of two adjacent color film sections 41 in the display module 100 according to some embodiments. As shown in Fig. 15, in the exit light from the light-emitting portion 14, a maximum value of the angle between the exit light entering the adjacent color film portion 41 and the third direction Z is θ1, and a minimum value of the angle between the exit light entering the adjacent color film portion 41 and the third direction Z is θ2. For example, the maximum value θ1 of the angle between the exit light entering the adjacent color film portion 41 and the third direction Z may be 21°, and the minimum value θ2 of the angle between the exit light entering the adjacent color film portion 41 and the third direction Z may be 41°.That is, the output light emitted from the light-emitting portion 14 at an angle in the range of 21° to 41° can all enter the adjacent color film portion 41, forming crosstalk between adjacent color film portions 41.

[0130] Fig. 16 is a brightness distribution diagram before deflection of the exit light entering the adjacent color film section 41 according to some embodiments. Fig. 17 is a brightness distribution diagram after deflection of the exit light entering the adjacent color film section 41 according to some embodiments.

[0131] As in the Fig. 16 and Fig. As shown in Figure 17, the exit light is deflected after the exit light is modulated by using the metasurface structure 315E in the above embodiments. For example, the maximum value of the angle between the exit light entering the adjacent color film section 41 and the third direction Z may be 21°, and the minimum value of the angle between the exit light entering the adjacent color film section 41 and the third direction Z may be 41°. The angle of the deflected exit light is approximately in a range of 5° to 15°. Fig. 16 and Fig. 17, it can be seen that the output light entering the adjacent color film section 41 after modulation by the metasurface structure 315E can be 20% of the output light before deflection. It can be seen that the metasurface structure 315E formed by the above embodiment has a deflection effect on wide-angle light, so that the output light entering a color film section 41 adjacent to the corresponding color film section 41 is reduced. This can reduce crosstalk between adjacent color film sections 41, which contributes to improving the display contrast of the display module 100.

[0132] Fig. 18 is a structural diagram of a display module 100 according to some other embodiments. As in Fig. 18, in some other embodiments, the plurality of light-emitting sections 14 may be configured to emit light in three primary colors. For example, the light-emitting sections 14 may include first light-emitting sections 141, second light-emitting sections 142, and third light-emitting sections 143. The first light-emitting section 141 may be configured to emit red light, the second light-emitting section 142 may be configured to emit green light, and the third light-emitting section 143 may be configured to emit blue light.

[0133] As described in the above embodiments, the first color film portion 411 may be a red color film portion 41, the second color film portion 412 may be a green color film portion 41, and the third color film portion 413 may be a blue color film portion 41. The first light-emitting portion 141 may be arranged opposite the first color film portion 411, the second light-emitting portion 142 may be arranged opposite the second color film portion 412, and the third light-emitting portion 143 may be arranged opposite the third color film portion 413. With the above arrangement, the output light emitted from the light-emitting portions 14 can display a predetermined image through the corresponding color film portions 41.

[0134] In some embodiments, in a modulation section 31 corresponding to the first light-emitting section 141, the periodic spacing P may be equal to half the wavelength of the red light. In a modulation section 31 corresponding to the second light-emitting section 142, the periodic spacing P may be equal to half the wavelength of the green light. In a modulation section 31 corresponding to the third light-emitting section 143, the periodic spacing P may be equal to half the wavelength of the blue light.

[0135] The term "equal" here can encompass both absolute equality and approximate equality. This means that, due to certain uncontrollable errors (e.g., errors in the manufacturing process, instrument accuracy, measurement errors, or similar), a difference between the periodic spacing P and half the wavelength of the red light, green light, or blue light can be considered approximately equal within an acceptable deviation range. The acceptable deviation range can be 30%, 20%, 10%, or 5% of any of these.

[0136] The design process of the size and position of the unit structure 3153 in the embodiments in which the plurality of light-emitting sections 14 are configured to emit light in three primary colors will be briefly described below.

[0137] As described in the above embodiments, each unit structure 3153 has a different phase value, and a first column 3153A corresponding to any one unit structure 3153 has a different size, that is, the first column 3153A corresponding to any one unit structure 3153 has a different radius.

[0138] The radius of the first column 3153A corresponding to the unit structure 3153 can be calculated according to the phase value of the unit structure 3153 by Formula (2) and Formula (3). In Formula (2) and Formula (3), λ is the wavelength of the light from the light-emitting portion 14 corresponding to the unit structure 3153. Since the plurality of light-emitting portions 14 can be configured to emit light in three primary colors, the wavelengths of the light from the light-emitting portions 14 corresponding to the unit structures 3153 can include red light, green light, and blue light.

[0139] Furthermore, the coordinates of the first column 3153A corresponding to the unit structure 3153 can be calculated by formula (4) based on the phase value of the unit structure 3153. In formula (4), λ is the wavelength of the light from the light-emitting portion 14 corresponding to the unit structure 3153. Since the plurality of light-emitting portions 14 can be configured to emit light in three primary colors, the wavelengths of the light from the light-emitting portions 14 corresponding to the unit structures 3153 can include red light, green light, and blue light.

[0140] It should be understood that in embodiments where the plurality of light-emitting sections 14 are configured to emit light in three primary colors, the same modulation section 31 has different modulation effects on output light with different wavelengths. For example, the same modulation section 31 enables a larger deflection angle of red light and a smaller deflection angle of blue light.

[0141] By the above arrangement, the modulation section 31 arranged between the first color film section 411 and the first light-emitting section 141 can modulate red light, the modulation section 31 arranged between the second color film section 412 and the second light-emitting section 142 can modulate green light, and the modulation section 31 arranged between the third color film section 413 and the third light-emitting section 143 can modulate blue light.

[0142] In summary, for different light-emitting sections 14, the sizes and positions of the unit structures 3153 are adjusted accordingly. During the design and arrangement of the plurality of unit structures 3153 of the corresponding modulation section 31 in the same light-emitting section 14, a phase value within the value range of the phase value of the unit structure 3153 can be selected for each unit structure 3153. The corresponding equivalent refractive index and radius of the unit structure 3153 can be obtained by formula (2) and formula (3) from the corresponding phase value to obtain the size of the unit structure 3153. Furthermore, the corresponding coordinates of the unit structure 3153 are obtained by formula (4) from the corresponding phase value.Similarly, the sizes and positions of the plurality of unit structures 3153 can be designed to form the corresponding modulation structure 315 and achieve the corresponding light beam modulation effect. Similarly, for a different light-emitting section 14, the arrangement and layout process of the plurality of unit structures 3153 in the corresponding modulation section 31 is the same. In this way, the modulation sections 31 of different light-emitting sections 14 are designed accordingly, so that the modulation sections 31 corresponding to the different light-emitting sections 14 also have different modulation effects, which is beneficial for equally improving the crosstalk effect between any two adjacent color film sections 41, thereby realizing the uniform display effect of the display module 100.

[0143] Fig. 19 is a structural diagram of a modulation section 31 according to some other embodiments. Fig. 20 is a plan view of a modulation section 31 according to some further embodiments.

[0144] In some other embodiments and with reference to Fig. 19 and Fig. 20, the plurality of unit structures 3153 have the same phase values. The unit structure 3153 includes a second column 3153B extending in the third direction Z, wherein a second column 3153B corresponding to any one unit structure 3153 has the same size. The third direction Z is perpendicular to the display substrate 10.

[0145] As described in the above embodiments, the plurality of unit structures 3153 may be arranged at intervals in a direction parallel to the display substrate 10, and the extending directions of the plurality of unit structures 3153 are all perpendicular to the display substrate 10. The unit structure 3153 may be on the order of a small wavelength, and the electromagnetic wave modulation of the meta-surface structure 315E can be realized by the arrangement design of the unit structures.

[0146] For example, since the plurality of unit structures 3153 have the same phase values, the second pillars 3153B corresponding to the plurality of unit structures 3153 can all have the same sizes. It is understood that a radius of any second pillar 3153B also satisfies the above formula (2) and formula (3). It is apparent that the sizes of the second pillars 3153B corresponding to the plurality of unit structures 3153 can all be the same, and the equivalent refractive indices of the second pillars 3153B corresponding to the plurality of unit structures 3153 are all the same.

[0147] For example, the modulation structure 315 may include a plurality of second pillars 3153B having equal sizes, and the second pillars 3153B are arranged in an array. The distances between the center lines of two adjacent second pillars 3153B are equal. By the above arrangement, the central symmetry of the plurality of second pillars 3153B can be realized. As described in the above embodiments, an isolation structure 3155 is provided between adjacent unit structures 3153. All of the second pillars 3153B and the isolation structure 3155 may together form a metasurface grating. By providing the metasurface grating, modulation of the output light from the light-emitting portion 14 can be achieved to converge the output light, thereby preventing the output light from entering a color film portion 41 adjacent to the corresponding color film portion 41.Furthermore, the crosstalk between adjacent color film sections 41 can be reduced and the contrast of the display module 100 can be improved.

[0148] The second column 3153B may be a cylinder or the second column 3153B may be another column structure, such as a prism, which is not limited in some embodiments of the present disclosure.

[0149] It should be understood that in the above embodiments, in which the phase values ​​of the plurality of unit structures 3153 are all different, in order to achieve high phase coverage of the unit structures 3153, a plurality of phase values ​​are selected within the value range of the phase value of the unit structure 3153. According to the different phase values ​​of the plurality of unit structures 3153, the duty cycles of the first columns 3153A also include a plurality of different values. For a first column 3153A with a relatively large radius, a value of the duty cycle of the first column 3153A is relatively large. For example, the value of the duty cycle of the first column 3153A may be close to 1. However, if the value of the duty cycle of the first columns 3153A is relatively large, the processing difficulty of the first columns 3153A increases, and thus the manufacturing efficiency of the modulation structure 315 is reduced.

[0150] With the above arrangement, the structural uniformity of the modulation section 31 can be improved. Furthermore, the manufacturing difficulty of the second pillar 3153B can be reduced, and thus the manufacturing efficiency of the modulation structure 315 can be improved.

[0151] As mentioned in the above embodiments, the display module 100 further includes the encapsulation layer 20, and the light modulation layer 30 is located between the encapsulation layer 20 and the color film layer 40. With the above arrangement, the output light from the light-emitting portion 14 enters the corresponding modulation structure 315 through the encapsulation layer 20, and after converging through the corresponding modulation structure 315, the converged output light enters the corresponding color film portion 41.

[0152] In some embodiments, the second column 3153B satisfies the following formula: d(nmsin θin±nout sin θout)=mλ;

[0153] In formula (5), d is a distance between the centerlines of adjacent unit structures 3153. The distances between the centerlines of any two adjacent unit structures 3153 are equal. For example, the distance between the centerlines of the two second pillars 3153B may be close to the wavelength scale.

[0154] In formula (5) n in the refractive index of the encapsulation layer 20 and θ in the angle between the light from the light-emitting section 14 corresponding to the unit structure 3153 and a normal.

[0155] Of course, in some other embodiments, the encapsulation layer 20 may be replaced by a different film layer structure. That is, the exit light from the light-emitting section 14 enters the corresponding modulation structure 315 through a different film layer structure. In this case, n in the refractive index of the other film layer structure.

[0156] In formula (5) n out a refractive index of the color film portion 41 corresponding to the unit structure 3153, and θ out is an angle between the light exiting the corresponding color film section 41 and the normal.

[0157] As described in the above embodiments, the color film sections 41 include the first color film sections 411, the second color film sections 412, and the third color film sections 413 with different colors. In some embodiments, the refractive indices corresponding to the first color film sections 411, the second color film sections 412, and the third color film sections 413 are all different.

[0158] In formula (5), m is a coefficient and m=1, and λ is the wavelength of the light from the light-emitting section 14 corresponding to the unit structure 3153.

[0159] By the above arrangement, the distance between the center lines of adjacent unit structures 3153 can be determined. Since the plurality of unit structures 3153 are arranged in an array, the arrangement of the plurality of unit structures 3153 can be determined, ie, the coordinates of the plurality of unit structures 3153 can be determined.

[0160] In some embodiments, the ratio of a diameter of the second column 3153B to a distance between the centerlines of two adjacent unit structures 3153 is in a value range of 0.3 to 0.6. For example, the ratio of the diameter of the second column 3153B to the distance between the centerlines of two adjacent unit structures 3153 may be 0.3, 0.4, 0.5, or 0.6. The above arrangement is advantageous for improving the uniformity of the structure of the modulation section 31. As the ratio of the diameter of the second column 3153B to the distance between the centerlines of two adjacent unit structures 3153 approaches 0.3, it is advantageous for reducing the manufacturing difficulty of the second column 3153B, thereby further reducing the manufacturing efficiency of the modulation structure 315.

[0161] Fig. 21 is a structural diagram of a display module 100 according to some further embodiments. As in Fig. As shown in Figure 21, the plurality of light-emitting sections 14 are configured to emit light in three primary colors. For example, the light-emitting sections 14 may include first light-emitting sections 141, second light-emitting sections 142, and third light-emitting sections 143. The first light-emitting section 141 may be configured to emit red light, the second light-emitting section 142 may be configured to emit green light, and the third light-emitting section 143 may be configured to emit blue light.

[0162] As described in the above embodiments, the first color film portion 411 may be the red color film portion 41, the second color film portion 412 may be the green color film portion 41, and the third color film portion 413 may be the blue color film portion 41. The first light-emitting portion 141 may be arranged opposite the first color film portion 411, the second light-emitting portion 142 may be arranged opposite the second color film portion 412, and the third light-emitting portion 143 may be arranged opposite the third color film portion 413. With the above arrangement, the output light emitted from the light-emitting portions 14 can display a predetermined image through the corresponding color film portions 41.

[0163] That is, in a method for determining the distance between the center lines of adjacent unit structures 3153 according to formula (5), in formula (5), λ is the wavelength of the light from the light-emitting portion 14 corresponding to the unit structure 3153. Since the plurality of light-emitting portions 14 can be configured to emit light in three primary colors, the wavelengths of the light from the light-emitting portions 14 corresponding to the unit structures 3153 can include red light, green light, and blue light.

[0164] By the above arrangement, for different light-emitting sections 14, the sizes and positions of the unit patterns 3153 are adjusted accordingly, so that the modulation sections 31 corresponding to the different light-emitting sections 14 have different modulation effects, which is advantageous to equally improve the crosstalk effect between any two adjacent color film sections 41, and is further advantageous to realize the uniform display effect of the display module 100.

[0165] In some embodiments, in the modulation section 31 corresponding to the first light-emitting section 141, the periodic pitch P may be equal to half the wavelength of the red light; in the modulation section 31 corresponding to the second light-emitting section 142, the periodic pitch P may be equal to half the wavelength of the green light; and in the modulation section 31 corresponding to the third light-emitting section 143, the periodic pitch P may be equal to half the wavelength of the blue light.

[0166] Here, the term "equal" can encompass both absolute equality and approximate equality. That is, due to certain uncontrollable errors (e.g., errors in the manufacturing process, instrumentation accuracy, measurement errors, or similar), a difference between the periodic spacing P and half the wavelength of red light, green light, or blue light can be considered approximately equal within an acceptable deviation range. The acceptable deviation range can be 30%, 20%, 10%, or 5% of any of these.

[0167] In summary, for different light-emitting sections 14, the sizes and positions of the unit structures 3153 are adjusted accordingly. During the arrangement and layout process of the plurality of unit structures 3153 of the corresponding modulation section 31, in the same light-emitting section 14, for each unit structure 3153, the distance between the center lines of adjacent unit structures 3153 can be obtained by formula (5), and then the corresponding radius is obtained, so that the size of the unit structure 3153 is obtained. Further, the plurality of unit structures 3153 can be arranged according to the distance between the center lines of adjacent unit structures 3153, that is, the coordinates of the plurality of unit structures 3153 can be obtained.By analogy, the sizes and positions of the plurality of unit structures 3153 can be designed to form the corresponding modulation structure 315 and achieve the corresponding light beam modulation effect. Similarly, for a different light-emitting section 14, the arrangement and layout process of the plurality of unit structures 3153 in the corresponding modulation section 31 is the same. In this way, the modulation sections 31 of different light-emitting sections 14 are designed accordingly, so that the modulation sections 31 corresponding to the different light-emitting sections 14 also have different modulation effects, which is advantageous for equally improving the crosstalk effect between any two adjacent color film sections and thereby realizing the uniform display effect of the display module 100.

[0168] The foregoing descriptions are merely specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto. Variants or alternatives that any person skilled in the art can imagine within the scope of the present disclosure are included within the scope of the present disclosure. Therefore, the scope of the present disclosure is determined by the scope of the claims.

Claims

[1] Display module, characterized by that the display module includes: a display substrate including a plurality of light-emitting sections; a color film layer located on a light-exiting side of the display substrate; wherein the color film layer comprises a plurality of color film sections; wherein the plurality of color film sections each cover the plurality of light-emitting sections; wherein the plurality of color film sections comprise at least two types of color film sections having different colors; and a light modulation layer disposed between the color film layer and the display substrate; wherein the light modulation layer comprises a plurality of modulation sections; wherein a modulation section is disposed between a light-emitting section and a color film section, respectively; wherein the modulation section comprises a modulation structure and a transmission structure; wherein the color film section comprises a first region and a second region; wherein an orthographic projection of the transmission structure on the color film section is located in the first region; wherein the second region is adjacent to a color film section having a different color, wherein an orthographic projection of the modulation structure on the color film section is located in the second region; wherein the modulation structure is used to converge the output light from the corresponding light-emitting section. [2] Display module according to claim 1, characterized by that an orthographic projection of the transmission structure on the display substrate completely covers the corresponding light-emitting section. [3] Display module according to claim 2, characterized by that the transmission structure comprises a vacuum layer. [4] Display module according to one of claims 1 to 3, characterized by that an orthographic projection of the modulation section on the display substrate coincides with an orthographic projection of the corresponding color film section on the display substrate. [5] Display module according to one of claims 1 to 4, characterized byin that the modulation structure comprises a meta-surface structure comprising a plurality of unit structures, the plurality of unit structures being arranged in an array, the distances between centerlines of two adjacent unit structures being equal and each unit structure having an equal height in a direction perpendicular to the display substrate. [6] Display module according to claim 5, characterized by that the multitude of unit structures are centrally symmetric. [7] Display module according to claim 5 or claim 6, characterized by that a material of the unit structure comprises silicon nitride. [8] Display module according to one of claims 5 to 7, characterized by that the meta-surface structure further comprises an isolation structure disposed between the plurality of unit structures, wherein a refractive index of the unit structure is greater than a refractive index of the isolation structure. [9] Display module according to claim 8, characterized by that a difference between the refractive index of the unit structure and the refractive index of the isolation structure lies in a value range of 1.03 to 1.

3. [10] Display module according to claim 8 or claim 9, characterized by that the modulation structure comprises a first edge and a second edge arranged opposite each other, wherein the first edge is arranged near the transmission structure and the second edge is arranged away from the transmission structure; wherein a distance between the first edge and the second edge is L and satisfies the following formula: L=T2×tan θ; where L is the distance between the first edge and the second edge; T2 is a thickness of the color film portion corresponding to the modulation structure; and θ is an angle by which the modulation structure deflects light from the light-emitting section, where θ = sin -1 (1 / n), where n is a refractive index of the color film portion corresponding to the modulation structure. [11] Display module according to claim 10, characterized by that any one of the unit structures has a different phase value, the unit structure comprising a first column extending in a third direction, the first column corresponding to any one of the unit structures having a different size; wherein the third direction intersects the display substrate. [12] Display module according to claim 11, characterized by that the phase value of the unit structure lies in a range from 0 to 2π(m-1) / m, where m is a positive integer. [13] Display module according to claim 12, characterized bythat the first column is a cylinder and a radius r of the first column corresponding to any of the unit structures satisfies the following formula: neff=n12−(U(r,n2)λ2πr)2; where n eff is an equivalent refractive index corresponding to the unit structure, and φ=2πλneffH, where φ is a phase value corresponding to the unit structure, H is a height of the unit structure in a direction perpendicular to the display substrate, and λ is a wavelength of light from the light-emitting portion corresponding to the unit structure; U(r, n2) is a Bessel function related to r and n2, where r is the radius of the first column corresponding to the unit structure and n2 is a refractive index of the unit structure; and n1 is a refractive index of the insulation structure. [14] Display module according to claim 13, characterized bythat the coordinates of the first column corresponding to any of the unit structures satisfy the following formula φ(x,y)=2πn2λ(x+y)sin θ; where n2 is the refractive index of the unit structure; λ is the wavelength of light from the light-emitting section corresponding to the unit structure; θ is an angle by which the unit structure deflects the light from the corresponding light-emitting section; x is a coordinate value of the unit structure on a first coordinate axis extending in a first direction; and y is a coordinate value of the unit structure on a second coordinate axis extending in a second direction, wherein a common origin of the first coordinate axis and the second coordinate axis is located at a center of the modulation section, wherein the first direction and the second direction are parallel to the display substrate, and the first direction and the second direction intersect. [15] Display module according to claim 10, characterized by in that the plurality of unit structures have equal phase values, the unit structure comprising a second column extending in a third direction, the second column corresponding to any one of the unit structures having an equal size; wherein the third direction intersects the display substrate. [16] Display module according to claim 15, characterized bythat the display module further comprises an encapsulation layer and the light modulation layer is arranged between the encapsulation layer and the color film layer; wherein the second column satisfies the following formula: d(ninsin θin±nout sin θout)=mλ; where d is a distance between the centerlines of adjacent unit structures; n in is a refractive index of the encapsulation layer, and θ in is an angle between the light from the light-emitting portion corresponding to the unit structure and a normal; n out is a refractive index of the color film portion corresponding to the unit structure, and θ out is an angle between the light emerging at the corresponding color film section and the normal; m is a coefficient and m=1; λ is a wavelength of light from the light-emitting section corresponding to the unit structure. [17] Display module according to claim 16, characterized by that the ratio of the diameter of the second column to the distance between the center lines of two adjacent unit structures lies in a range of values ​​from 0.3 to 0.

6. [18] Display module according to one of claims 1 to 17, characterized by that the modulation structure is arranged around the transmission structure. [19] Display module according to claim 18, characterized byin that the modulation structure comprises a first subsection, a second subsection, a third subsection, and a fourth subsection, which are sequentially connected end-to-end; wherein the first subsection and the third subsection extend in a first direction and are arranged opposite each other in a second direction, wherein the second subsection and the fourth subsection extend in the second direction and are arranged opposite each other in the first direction; and wherein the first direction and the second direction are parallel to the display substrate, the first direction and the second direction intersecting each other; wherein a width of the first subsection in the second direction, a width of the third subsection in the second direction, a width of the second subsection in the first direction, and a width of the fourth subsection in the first direction are the same. [20] Display device, characterized by that the display device comprises the display module according to one of claims 1 to 19.

Images