CN113156732B - Reflective display panel, preparation method thereof and display device - Google Patents

Abstract

The embodiment of the disclosure provides a reflective display panel, a preparation method thereof and a display device. The reflective display panel includes: a first substrate and a second substrate arranged opposite to each other, and an ink structure layer between the first substrate and the second substrate; the ink structure layer includes: an ink including black microparticles; further comprises: a first reflecting structure and a second reflecting structure which are oppositely arranged, wherein the first reflecting structure is positioned on one side of the first substrate close to the second substrate and is configured to reflect part of light rays incident to the first reflecting structure to a direction close to the first substrate; the second reflecting structure is positioned on one side of the second substrate close to the first substrate and is configured to reflect the other part of light emitted from the first reflecting structure to the second reflecting structure towards the direction close to the first substrate.

Description

Reflective display panel, preparation method thereof and display device

Technical Field

The embodiment of the disclosure relates to the technical field of display, and in particular relates to a reflective display panel, a preparation method thereof and a display device.

Background

Currently, display devices can be classified into three types, transmissive, reflective, and transflective, depending on the type of light source (including backlight or ambient light) utilized by the display device. Among them, the reflective display device realizes display by reflecting ambient light incident into the reflective display device. Since the reflective display device does not need to additionally provide a backlight module to backlight its display, the reflective display device has been widely focused and applied. However, some reflective display devices in the art have problems of low reflectivity and poor display effect when displaying in a bright state.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

In a first aspect, embodiments of the present disclosure provide a reflective display panel, including: a first substrate and a second substrate arranged opposite to each other, and an ink structure layer between the first substrate and the second substrate; the ink structure layer includes: an ink including black microparticles;

Further comprises: a first reflecting structure and a second reflecting structure which are oppositely arranged, wherein the first reflecting structure is positioned on one side of the first substrate close to the second substrate and is configured to reflect part of light rays incident to the first reflecting structure to a direction close to the first substrate; the second reflecting structure is positioned on one side of the second substrate close to the first substrate and is configured to reflect the other part of light emitted from the first reflecting structure to the second reflecting structure towards the direction close to the first substrate.

In a second aspect, embodiments of the present disclosure provide a display apparatus including: the reflective display panel described in the above embodiment.

In a third aspect, an embodiment of the present disclosure provides a method for manufacturing a reflective display panel, where the reflective display panel is the reflective display panel described in the foregoing embodiment, and the method includes:

Providing a first substrate and a second substrate;

Forming a first reflecting structure on the first substrate;

forming a second reflecting structure on the second substrate;

And filling ink comprising black particles between the first substrate and the second substrate to form an ink structure layer.

In a fourth aspect, an embodiment of the present disclosure provides a method for manufacturing a reflective display panel, where the reflective display panel is the reflective display panel described in the foregoing embodiment, and the method includes:

Providing a first substrate and a second substrate;

Forming a first reflecting structure and the retaining wall structure on the first substrate, and forming a second reflecting structure on the second substrate, or forming a first reflecting structure on the first substrate, and forming a second reflecting structure and the retaining wall structure on the second substrate;

And filling ink comprising black particles between the first substrate and the second substrate to form an ink structure layer.

The embodiment of the disclosure provides a reflective display panel, a preparation method thereof and a display device, wherein the reflective display panel can comprise: the ink-jet printing device comprises a first substrate, a second substrate, an ink structure layer, a first reflecting structure and a second reflecting structure, wherein the first substrate and the second substrate are oppositely arranged, the ink structure layer is positioned between the first substrate and the second substrate, the first reflecting structure is positioned on one side of the first substrate close to the second substrate, and the first reflecting structure is configured to reflect part of light rays incident to the first reflecting structure to a direction close to the first substrate; and a second reflecting structure positioned on one side of the second substrate close to the first substrate and configured to reflect the other part of the light rays emitted from the first reflecting structure to the second reflecting structure toward the direction close to the first substrate. Thus, according to the reflective display panel provided by the exemplary embodiment of the disclosure, the second reflective structure is prepared on the second substrate, so that light leakage of the first reflective structure can be reflected again, and therefore, the bright state reflectivity of the reflective display panel can be improved, the contrast ratio and the bright state brightness of the reflective display panel can be improved, and the display quality of the reflective display panel can be improved.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. Other advantages of the present disclosure may be realized and attained by the structure particularly pointed out in the written description and drawings.

Other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.

Drawings

The accompanying drawings are included to provide an understanding of the technical aspects of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present disclosure and together with the embodiments of the disclosure, not to limit the technical aspects of the present disclosure. The shapes and sizes of various components in the drawings are not to scale true, and are intended to be illustrative of the present disclosure.

FIG. 1A is a schematic diagram of a reflective display device in a bright state;

FIG. 1B is a schematic diagram of a reflective display device in a dark state;

FIG. 1C is a schematic diagram of another reflective display device;

FIG. 1D is a schematic diagram of another reflective display device in a bright state;

FIG. 1E is a schematic diagram of another reflective display device in a dark state;

FIG. 1F is a schematic diagram showing a first light leakage of another reflective display device in a bright state;

FIG. 1G is a schematic diagram showing a second light leakage of another reflective display device in a bright state;

fig. 2 is a schematic structural view of a reflective display panel in an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a reflective display panel in a bright state display according to an exemplary embodiment of the present disclosure;

Fig. 4 is a schematic view of a retaining wall structure according to an exemplary embodiment of the present disclosure;

FIG. 5A is a schematic illustration of a second reflective structure in an exemplary embodiment of the present disclosure;

FIG. 5B is another schematic illustration of a second reflective structure in an exemplary embodiment of the present disclosure;

FIG. 5C is yet another schematic illustration of a second reflective structure in an exemplary embodiment of the present disclosure;

Fig. 6 is a schematic view of a first reflective structure and a retaining wall structure formed on a first substrate in an exemplary embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a second reflective structure formed on a second substrate in an exemplary embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a first reflective structure formed on a first substrate in an exemplary embodiment of the present disclosure;

fig. 9 is a schematic view of a second reflective structure and a retaining wall structure formed on a second substrate in an exemplary embodiment of the present disclosure.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail hereinafter with reference to the accompanying drawings. Note that embodiments may be implemented in a number of different forms. One of ordinary skill in the art can readily appreciate the fact that the manner and content may be varied into a wide variety of forms without departing from the spirit and scope of the present disclosure. Accordingly, the present disclosure should not be construed as being limited to the following description of the embodiments. Embodiments of the present disclosure and features of embodiments may be combined with each other arbitrarily without conflict.

In the drawings, the size of each constituent element, the thickness of a layer, or a region may be exaggerated for clarity. Accordingly, one aspect of the present disclosure is not necessarily limited to this dimension, and the shapes and sizes of the various components in the drawings do not reflect actual proportions. Further, the drawings schematically show ideal examples, and one mode of the present disclosure is not limited to the shapes or numerical values shown in the drawings, and the like.

The ordinal numbers of "first", "second", "third", etc. in the present specification are provided to avoid mixing of constituent elements, and are not intended to be limited in number.

In the present specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate an azimuth or a positional relationship, are used to describe positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus are not to be construed as limiting the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction in which the respective constituent elements are described. Therefore, the present invention is not limited to the words described in the specification, and may be appropriately replaced according to circumstances.

In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, it may be a fixed connection, a removable connection, or an integral connection; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intermediate members, or may be in communication with the interior of two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.

The reflective display device is a device structure for displaying by utilizing natural environment light, can realize clear display by utilizing the environment light under strong light or weak light, and has the advantages of small driving voltage, energy saving and less damage to eyes. The present reflective display device may include: electronic Ink (E-Ink) reflective display devices and Clear-Ink (CID) reflective display devices.

The working principle of the E-Ink reflective display device is as follows: when a voltage is applied to an electrode in the reflective display device, white particles in the ink move to the surface of the dielectric layer on the display side, black particles in the ink move to the side opposite to the display side, and light is reflected to realize bright state display; when a voltage is applied to the electrodes in the reflective display, white particles in the ink move to the opposite side of the display side, black particles in the ink move to the surface of the dielectric layer on the display side, and light is directly absorbed to realize dark state display.

Fig. 1A is a schematic structural diagram of a reflective display device in a bright state, and fig. 1B is a schematic structural diagram of a reflective display device in a dark state. As shown in fig. 1A and 1B, the reflective display device may include: the first and second substrates 111 and 121 disposed opposite to each other, the first electrode 112 disposed at a side of the first substrate 111 close to the second substrate 121, the second electrode 122 disposed at a side of the second substrate 121 close to the first substrate 111, and the microcapsule 13 disposed between the first and second electrodes 112 and 122, the microcapsule 13 may include: the ink 14 includes white fine particles 141 (which may be also referred to as white ink particles or white microsphere particles) and black fine particles 142 (which may be also referred to as black ink particles or black microsphere particles), wherein the charges carried by the black fine particles 142 and the white fine particles 141 are different. For example, when the first electrode 112 and the second electrode 122 are not energized, the black microparticles 142 are negatively charged, the white microparticles 141 are positively charged, and the overall microcapsule 13 assumes an electrically balanced state. For example, as shown in fig. 1A, when a positive voltage is applied to the first electrode 112, the black particles 142 approach the first electrode 112, the white particles 141 are distributed over the microcapsules 13, and the ambient light incident from the second substrate 121 is reflected at the white particles 141 in the microcapsules 13, and at this time, the display device may exhibit a bright state display. For example, as shown in fig. 1B, when the first electrode 112 is applied with a negative voltage, the white fine particles 141 approach the first electrode 112, the black fine particles 142 are distributed over the microcapsules 13, and the ambient light incident from the second substrate 121 is absorbed at the black fine particles 142 in the microcapsules 13, and at this time, the display device may exhibit a dark state display.

Another CID reflective display device works on the principle of: when voltage is applied to the electrode in the reflective display device, black particles in the ink move to the side opposite to the display side, and bright state display is realized by utilizing total reflection realized by the high refractive index of the medium layer and the low refractive index of the electronic ink; when a voltage is applied to an electrode in a reflective display device, black particles in ink move to the surface of a dielectric layer on the display side, so that light is directly absorbed to realize a dark state display.

Fig. 1C is a schematic structural diagram of another reflective display device, fig. 1D is a schematic structural diagram of another reflective display device in a bright state, and fig. 1E is a schematic structural diagram of another reflective display device in a dark state. In fig. 1D and 1E, a lens is illustrated as an example.

For example, as shown in fig. 1C, the reflective display may include: the first substrate 21 and the second substrate 22 disposed opposite to each other, a filter layer 29 disposed on a side of the first substrate 21 near the second substrate 22, a transparent lens 28 disposed on a side of the filter layer 29 near the second substrate 22, a first electrode 23 disposed on a side of the lens 28 near the second substrate 22, a first dielectric layer 24 disposed on a side of the first electrode 23 near the second substrate 22, a second electrode 25 disposed on a side of the second substrate 22 near the first substrate 21, a second dielectric layer 26 disposed on a side of the second electrode 25 near the first substrate 21, an ink 20 (including black particles) filled between the first substrate 21 and the second substrate 22, and a dam structure 27 disposed between the first substrate 21 and the second substrate 22. Among them, the black fine particles in the ink 20 have two main characteristics: (1) Is sensitive to voltage or electric field, and can move rapidly under the electric field or voltage; (2) the black fine particles themselves have light absorption ability. For example, as shown in fig. 1C and 1D, when the first electrode 23 applies the black fine particle repulsive voltage and the second electrode 25 applies the black fine particle attractive voltage, the black fine particles migrate in a direction away from the first substrate 21, so that at least light incident from the first substrate 21 of the reflective display may be totally reflected at an interface between the first dielectric layer 24 and the ink 20 due to the refractive index of the first dielectric layer 24 being greater than that of the ink 20, and the reflected light is absorbed and recognized by eyes of a user, thereby enabling bright state display of the reflective display. For example, as shown in fig. 1C and 1E, when the first electrode 23 applies a black particle attracting voltage and the second electrode 25 applies a black particle repelling voltage, the black particles in the ink 20 migrate toward the first substrate 21, the black particles in the ink 20 are adsorbed onto the surface of the first dielectric layer 24, and the total reflection condition on the surface of the first dielectric layer 24 is destroyed because the refractive index of the first dielectric layer 24 is smaller than that of the black particles, so that at least the light incident from the first substrate 21 of the reflective display can pass through the first dielectric layer 24 when the interface between the first dielectric layer 24 and the ink 20, but the light is directly absorbed by the black particles in the ink 20 after escaping from the first dielectric layer 24, and at this time, no reflected light escapes, and a dark display is presented.

CID reflective display devices have advantages of low driving voltage, low power consumption, and realization of color display compared to E-ink reflective display devices, but have been found through studies by the present inventors: on the other hand, as shown in fig. 1F, when the arc top position of the first dielectric layer 24 is vertically incident by external ambient light, the incident light angle is smaller than the total reflection angle of the interface between the first dielectric layer 24 and the ink 20, so that the light cannot be totally reflected at the interface between the first dielectric layer 24 and the ink 20, and the light is absorbed by the black particles after "leaking" from the interface into the ink 20, so that the overall reflectivity of the external light is reduced, and the contrast and bright state brightness of the reflective display panel are reduced, resulting in the reduction of the display quality of the reflective display panel. On the other hand, as shown in fig. 1G, the first dielectric layer 24 is generally manufactured by a process of embossing and thermal reflow, and the radian of the top of the first dielectric layer 24 is most difficult to control during the manufacturing process due to the process limitation, and when the radian of the top of the first dielectric layer 24 is smaller than the pre-designed value during the manufacturing process, the proportion of "light leakage" is further increased, so that the bright state reflectivity of the CID reflective display device is further reduced. Therefore, the CID reflective display device has a problem that a portion of the ambient incident light is not totally reflected at the interface between the first dielectric layer 24 and the ink 20 during the bright state display, so that the CID reflective display device has a problem of low reflectivity during the bright state display, so that the contrast ratio and the bright state brightness of the reflective display panel are reduced, and the display quality of the reflective display panel is reduced.

At least one exemplary embodiment of the present disclosure provides a reflective display panel. The reflective display panel may include: the ink-jet recording head comprises a first substrate, a second substrate and an ink structure layer, wherein the first substrate and the second substrate are oppositely arranged; the ink structure layer includes: an ink including black microparticles; the reflective display panel may further include: the first reflecting structure is positioned on one side of the first substrate close to the second substrate and is configured to reflect a part of light rays entering the first reflecting structure to a direction close to the first substrate; and a second reflecting structure positioned on one side of the second substrate close to the first substrate and configured to reflect the other part of the light rays emitted from the first reflecting structure to the second reflecting structure toward the direction close to the first substrate.

In this way, according to the reflective display panel provided by the exemplary embodiment of the present disclosure, the light leakage of the first reflective structure prepared on the first substrate can be reflected and utilized again through the second reflective structure prepared on the second substrate, so that the bright state reflectivity of the reflective display panel can be improved, the contrast ratio and the bright state brightness of the reflective display panel can be improved, and further the display quality of the reflective display panel can be improved.

Exemplary embodiments of the present disclosure provide a reflective display panel, for example, fig. 2 is a schematic structural diagram of the reflective display panel in exemplary embodiments of the present disclosure, and fig. 3 is a schematic structural diagram of the reflective display panel in exemplary embodiments of the present disclosure in a bright state. Here, in fig. 3, the first reflection structure includes: one lens is exemplified and one reflecting column in the second reflecting structure is exemplified. In fig. 3, the light rays indicated by the solid lines with arrows are incident light rays and light rays leaking from the first reflecting structure, the light rays indicated by the broken lines with arrows are primary reflected light rays reflected by the first reflecting structure, and the light rays indicated by the dashed lines with arrows are secondary reflected light rays reflected by the second reflecting structure.

As shown in fig. 2 and 3, the reflective display panel may include: a first substrate 21 and a second substrate 22 disposed opposite to each other, and an ink structural layer between the first substrate 21 and the second substrate 22; the ink structure layer may include: an ink 20 containing black microparticles; the reflective display panel may further include: a first reflecting structure 30 and a second reflecting structure 31 disposed opposite to each other, wherein the first reflecting structure 30 is located at a side of the first substrate 21 near the second substrate 22 and configured to reflect a part of light rays incident on the first reflecting structure 30 in a direction near the first substrate 21; the second reflecting structure 31, which is located at a side of the second substrate 22 near the first substrate 21, is configured to reflect another part of the light emitted from the first reflecting structure 30 to the second reflecting structure 31 toward a direction near the first substrate 21.

In an exemplary embodiment, as shown in fig. 2, the reflective display panel may further include: a retaining wall structure 27 disposed between the first substrate 21 and the second substrate 22. As shown in fig. 4, the retaining wall structure 27 may include: a plurality of pixel opening areas 271 and opaque regions 272 disposed between adjacent pixel opening areas 271.

In one exemplary embodiment, the retaining wall structure may be prepared by nanoimprinting.

In an exemplary embodiment, as shown in fig. 2, the reflective display panel may further include: filter layer 29, filter layer 29 may include: the plurality of color filters 291 and the light shielding layer 292 disposed between the adjacent color filters 291, the light shielding layer 292 corresponding to the light-opaque region 272, and the plurality of color filters 291 may correspond to the plurality of pixel opening regions 271. Thus, when the reflective display panel displays, the positions corresponding to the pixel opening areas can display the colors corresponding to the colors of the color filters, so that the color display of the reflective display panel can be realized.

In one exemplary embodiment, the light shielding layer may be a Black Matrix (BM) configured to avoid crosstalk between adjacent pixels and to shield light irradiated on the thin film transistor. For example, as shown in fig. 3, areas other than the pixel opening area are covered with a black matrix.

In one exemplary embodiment, in a plane perpendicular to the reflective display panel, the height of the barrier wall structure and the height of the second reflective structure satisfy the following relationship:

Wherein H represents the height of the retaining wall structure, and H represents the height of the second reflective structure. The height of the retaining wall structure and the height of the second reflective structure may refer to the maximum height along a direction perpendicular to the first substrate. Here, when the h height is small, the travel of the light escaping from the first reflecting structure 30 to the second reflecting structure 31 is long, the rate of absorption of the light escaping from the first reflecting structure 30 by the black microspheres increases, and the secondary reflection efficiency is low; when the h height is larger, the distance between the light escaping from the first reflecting structure 30 and the second reflecting structure 31 is shorter, and the secondary reflecting effect is better, but when the CID shows the dark state, the adhesion speed and the adhesion effect of the black particles to the first reflecting structure 30 are affected due to the smaller distance between the reflecting posts and the first reflecting structure 30. Therefore, the height of the retaining wall structure and the height of the second reflecting structure meet the relation, so that the reflecting efficiency can be better improved, and better attaching speed and attaching effect are ensured.

In an exemplary embodiment, to avoid the first electrode and the second electrode from being conducted, the material of the barrier wall structure may be an insulating material such as polyimide, resin (e.g., any one of acrylic resin and epoxy resin), or silicon dioxide, etc. Here, the embodiment of the present disclosure is not limited thereto.

In an exemplary embodiment, as shown in fig. 2, a surface of the first reflective structure 30 adjacent to the second substrate 22 is a first curved surface protruding toward a direction adjacent to the second substrate 22, and the first curved surface is a portion of a spherical surface. For example, the first curved surface may be a part of any one of a spherical surface and an ellipsoidal surface.

In one exemplary embodiment, a surface of the second reflective structure 31 adjacent to the first substrate 21 is any one of a flat surface and a second curved surface, and the second curved surface is any one of a part of a spherical surface, a part of a conical surface, and an uneven surface. For example, as shown in fig. 2, a surface of the second reflective structure 31 near the first substrate 21 may be a concave arc surface; either the side of the second reflective structure 31 near the first substrate 21 may be a flat reflective surface as shown in fig. 5A, or the side of the second reflective structure 31 near the first substrate 21 may be a saw-tooth reflective surface as shown in fig. 5B, or the side of the second reflective structure 31 near the first substrate 21 may be a convex arc surface as shown in fig. 5C. Here, fig. 5A to 5B illustrate only the shape of the reflection post in the second reflection structure, and do not illustrate the reflection film provided on the curved surface of the reflection post.

In one exemplary embodiment, the cross-sectional shape of the first curved structure may be a portion of any one of a circle and an ellipse in a plane perpendicular to the reflective display panel, and the cross-sectional shape of the curved structure of the second reflective structure may be a portion of any one of a circle, an ellipse, and a triangle.

In one exemplary embodiment, the second reflective structure may be prepared by nanoimprinting.

In one exemplary embodiment, the second reflective structure and the wall structure may be prepared by a one-time patterning process.

In an exemplary embodiment, as shown in fig. 2, when the first curved surface of the first reflective structure 30 and the second curved surface of the second reflective structure 31 are both part of a spherical surface, the diameter of the spherical surface where the first curved surface is located and the diameter of the spherical surface where the second curved surface is located may satisfy the following relationship:

wherein D represents the diameter of the sphere where the first curved surface is located, and D represents the diameter of the sphere where the second curved surface is located. The reflective columns have a certain blocking effect on the diffusion of black particles in the ink to a certain extent, and the smaller the diameter of the reflective columns is, the better the smaller the diameter is, and the maximum diameter of the reflective columns is not more than 1/2 of the caliber of the lens on the premise of guaranteeing secondary reflection of light leakage of the arc top of the first reflective structure 30. Thus, the diameter of the sphere where the second curved surface of the second reflecting structure 31 is larger than that of the sphere where the first curved surface of the first reflecting structure 30 is not more than 1/2 times of that of the sphere, so that better secondary reflection can be ensured, and diffusion resistance to black particles can be also ensured to be smaller.

In one exemplary embodiment, as shown in fig. 2, the first reflective structure 30 may include: the first dielectric layer 24 is positioned on one side of the plurality of lenses 28 away from the first substrate 21, wherein the refractive index of the first dielectric layer 24 is larger than that of the ink 20, and the refractive index of the first dielectric layer 24 is smaller than that of the black particles.

In an exemplary embodiment, as shown in fig. 2, the first reflective structure 30 may further include: a first electrode 23 located between the plurality of lenses 28 and the first dielectric layer 24.

In one exemplary embodiment, as shown in fig. 2, the second reflecting structure 31 may include: at least one reflection post 311 corresponding to at least one of the plurality of lenses 28, and a reflection film 312 positioned at a side of the at least one reflection post 311 near the first substrate 21, wherein a refractive index of the reflection film 312 may be smaller than a refractive index of the ink 20.

In one exemplary embodiment, the material of the at least one reflection post may be any one of acrylic resin and epoxy resin. For example, when the material of the at least one reflection column is acrylic resin, the nano-imprint filling effect is better due to low viscosity, so that the completeness of the curved surface morphology of the at least one reflection column is good. For example, when the material of the at least one reflection post is epoxy resin, the mechanical strength of the cured curved surface of the at least one reflection post can be made higher due to the higher viscosity of the epoxy resin.

In one exemplary embodiment, the reflective film may have a single-layer structure or a multi-layer structure, and for example, the reflective film may have a single-layer structure of a material with high reflectivity such as an Ag (silver) film, a white reflective material film, white oil, or the like. For example, the reflective film may have a multilayer structure of a material with high reflectivity such as ITO/Ag/ITO. Thus, the light incident on the reflective film can be reflected, so that a high-brightness light-emitting effect can be obtained.

In one exemplary embodiment, the total number of reflective columns may be less than the total number of lenses in at least one pixel opening area.

In an exemplary embodiment, the number of reflection posts in the pixel opening area corresponding to the color filters with the same color in the plurality of color filters is the same, and/or the number of reflection posts in the pixel opening area corresponding to the color filters with at least two different colors in the plurality of color filters is different. Thus, the number of the reflective columns in the pixel opening area corresponding to each sub-pixel can be adjusted according to the display effect. For example, after the reflective display panel is manufactured, if the overall display color is greenish, the number of reflective columns in the pixel opening area corresponding to the green sub-pixel can be reduced when the reflective columns are manufactured, so that the brightness of the green sub-pixel is reduced, and the image chromaticity of the reflective display panel is optimized and adjusted. Furthermore, with reference to the method, the number of reflection columns in the pixel opening area corresponding to the sub-pixels with different colors can be designed pertinently according to the feedback display effect of the device, so that the adjustment and optimization of the display effect of the reflection display panel can be realized.

In one exemplary embodiment, as shown in FIG. 2, the lens 28 may be made of a transparent material, which may allow for higher light transmittance of the reflective display device. For example, as shown in fig. 2, a transparent lens 28 may be disposed between the first electrode 23 and the first substrate 21, and a surface of the lens 28 adjacent to the second substrate 22 may be curved. For example, the curved surface may be prepared by a nanoimprint process, a photolithography process, or the like. For example, as shown in fig. 2, a surface of the lens 28 adjacent to the second substrate 22 may be a curved surface protruding toward a direction adjacent to the second substrate 22. For example, the curved surface may be a portion of a sphere (e.g., a sphere or an ellipsoid). For example, the curved surface may be a hemispherical curved surface. Of course, the curved surface of the lens 28 may be other shapes, and may be set according to the thickness requirement of the display device (such as the distance between the light incident surface of the first substrate 21 and the reflective surface of the first dielectric layer 24). Here, the embodiment of the present disclosure is not limited thereto.

In an exemplary embodiment, the material of the lens 28 may be a transparent inorganic material or an organic material, and the refractive index of the inorganic material or the organic material forming the transparent dielectric layer 204 is 1.5 to 2.0, for example, the refractive index of the lens 28 may be 1.5, 1.6, 1.7, 1.8, 1.9, or 2.0. For example, the organic material forming the lens 28 may include at least one of polystyrene and acrylic, the inorganic material forming the lens 28 may include at least one of silicon dioxide, silicon oxynitride, and silicon nitride, and the lens 28 may also be formed of a titanium dioxide material. Of course, other materials are also possible, as long as they have a refractive index of 1.5 to 2.0, and are transparent, and have a certain hardness, for example, a material having a refractive index identical or substantially identical to that of the first dielectric layer 24. Here, the embodiment of the present disclosure is not limited thereto. As shown in fig. 3, the refractive index of the lens 28 and the refractive index of the first electrode 23 may be the same or substantially the same as the refractive index of the first dielectric layer 24, so that when light incident from the first substrate 21 side passes through the lens 28 and then passes through the first electrode 23 and the first dielectric layer 24, the propagation direction of the light is substantially unchanged, and since the refractive index of the first dielectric layer 24 may be greater than the refractive index of the ink 20, the incident light may be totally reflected at the interface between the first dielectric layer 24 and the ink 20.

In an exemplary embodiment, the thickness of the lens may be 10 μm (micrometers) to 20 μm, for example, 10 μm, 15 μm, or 20 μm. Here, the thickness of the lens is the maximum thickness in the direction perpendicular to the first substrate.

In one exemplary embodiment, as shown in fig. 2, the reflective display panel may further include: a second electrode 25 on a side of the first substrate 21 adjacent to the second substrate and a second dielectric layer 26 on a side of the second electrode 25 adjacent to the second substrate.

In an exemplary embodiment, the first electrode 23 may be disposed at a side of the lens 28 near the second substrate 22, or may be disposed at a side of the first substrate 21 far from the second substrate 22. For example, as shown in fig. 2, disposing the first electrode 23 on the side of the lens 28 away from the first substrate 21, that is, on the side closer to the second electrode 25, can reduce power consumption when applying a voltage to the first electrode 23 and the second electrode 25 to form an electric field. In the following description, the first electrode 23 is provided on the side of the lens 28 away from the first substrate 21, as an example.

In one exemplary embodiment, the first electrode may be one of a common electrode and a pixel electrode, and the second electrode may be the other of the common electrode and the pixel electrode. The pixel electrode is connected to a driving circuit in the array substrate, and a data voltage is applied thereto. The different data voltages enable the voltage difference between the first electrode and the second electrode to be different, so that the migration speed of the black particles in the direction away from the first substrate is different, and different display gray scales are realized.

In one exemplary embodiment, the first electrode and the second electrode may include: a monolithic electrode and one or more of a plurality of monolithic electrodes. For example, the first electrode and the second electrode may be monolithic electrodes, so that when a voltage is applied to the first electrode and the second electrode, accurate adjustment and control of light is achieved through accurate adjustment and control of black particles.

In one exemplary embodiment, the first electrode and the second electrode may be transparent electrodes made of the same material. For example, the transparent electrode may be made of a transparent conductive Oxide material such as Indium Tin Oxide (ITO), indium zinc Oxide (Indium Zinc Oxide, IZO), or the like. For example, both the first electrode and the second electrode may be formed of an ITO material, and thus, the transmittance of the reflective display device may be made higher.

In one exemplary embodiment, the first substrate may be a counter substrate and the second substrate may be an array substrate. For example, the opposite substrate may be a Color Film (CF) substrate. For example, the array substrate may include pixel driving circuits arranged in an array, each for driving one pixel, for example, to control a voltage difference between a first electrode and a second electrode in the corresponding pixel, thereby realizing display. The light is incident from the first substrate of the reflective display device, and the first substrate is a transparent substrate, for example, a glass substrate, so that the light transmittance of the reflective display device can be higher. For example, the material of the second substrate may include a resin. For example, the material of the second substrate may be one of Polydimethylsiloxane (PEMS), polyethylene terephthalate (PET), and Polyimide (PI).

In one exemplary embodiment, when the brightness of the ambient light is large, the light incident from the first substrate side of the reflective display device may be the ambient light, and at this time, the ambient light functions as a light source for display; when the brightness of the ambient light is low, a light emitting element may be additionally disposed on the first substrate, and the light incident from the front surface of the reflective display may be the light emitted from the light emitting element.

The embodiment of the disclosure also provides a display device, which may include: the reflective display panel of one or more embodiments described above.

In one exemplary embodiment, the display device may be: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer or a navigator. Here, the embodiment of the present disclosure does not limit the type of the display device. Other essential components of the display device are those of ordinary skill in the art and will not be described in detail herein, nor should they be considered as limiting the present disclosure.

In addition, the display device in the embodiments of the present disclosure may include other necessary components and structures besides the above-described structures, for example, a pixel driving circuit, etc., and those skilled in the art may design and supplement the display device according to the type of the display panel, which is not described herein.

The technical solutions of the embodiments of the present disclosure are described below by way of an example of a manufacturing process of a display panel. The "patterning process" in the embodiments of the present disclosure includes processes such as depositing a film layer, coating a photoresist, mask exposing, developing, etching, stripping the photoresist, etc., and is a well-known and well-established manufacturing process. The deposition may be performed by known processes such as sputtering, vapor deposition, chemical vapor deposition, etc., the coating may be performed by known coating processes, and the etching may be performed by known methods, which are not limited herein. In the description of the embodiments of the present disclosure, a "thin film" refers to a thin film made by depositing or coating a certain material on a substrate. The "thin film" may also be referred to as a "layer" if the "thin film" does not require a patterning process or a photolithography process throughout the fabrication process. If the "film" is also subjected to a patterning process or a photolithography process during the entire fabrication process, it is referred to as a "film" before the patterning process, and as a "layer" after the patterning process. The "layer" after the patterning process or the photolithography process contains at least one "pattern". The phrase "a and B are co-layer disposed" in this disclosure means that a and B are formed simultaneously by the same patterning process.

At least one embodiment of the present disclosure also provides a method for manufacturing a reflective display panel. The preparation method comprises the following steps:

step 11: a first substrate and a second substrate are provided.

For example, the first substrate and the second substrate may be a counter substrate and an array substrate, respectively, and for example, the counter substrate may be a color film substrate. The light energy is incident to the reflective display panel, and the first substrate is a transparent substrate, for example, a glass substrate.

Step 12: a first reflective structure is formed on a first substrate.

Step 13: a second reflective structure is formed on the second substrate.

In an exemplary embodiment, step 13 may include: step 131: the second reflective structure is prepared using a nanoimprint method.

In an exemplary embodiment, step 131 may include: coating nano imprinting glue on the second substrate; embossing to form a reflecting column with a reflecting groove by adopting a nano embossing method; and preparing a reflecting film in the reflecting groove.

In one exemplary embodiment, the reflective film may have a single-layer structure or a multi-layer structure, for example, the reflective film may have a single-layer structure of a material with high reflectivity such as an Ag (silver) film. For example, the reflective film may have a multilayer structure of a material with high reflectivity such as ITO/Ag/ITO. Thus, the light incident on the reflective film can be reflected, so that a high-brightness light-emitting effect can be obtained.

In an exemplary embodiment, the shape of the top end of the reflection post formed by embossing includes, but is not limited to, a concave cambered surface, or may be a convex cambered surface, a sawtooth-shaped reflection surface, a flat reflection surface, or the like.

In an exemplary embodiment, the nanoimprint glue may be selected from any one of acrylic resin and epoxy resin. For example, the acrylic resin has low viscosity, the nano-imprint filling effect is good, and the micro-morphology of the curved surface structure of the second reflecting structure is good in completeness. For example, epoxy resins have high viscosity and high mechanical strength after curing.

Step 14: and filling ink comprising black particles between the first substrate and the second substrate of the cartridge to form an ink structure layer.

In an exemplary embodiment, taking the first reflective structure and the retaining wall structure as an example, the manufacturing method may include steps 21 to 24:

Step 21: a first substrate and a second substrate are provided.

Step 22: as shown in fig. 6, a first reflective structure 30 and a wall structure 27 are formed on the first substrate.

Step 23: as shown in fig. 7, a second reflective structure 31 is formed on the second substrate.

Step 24: as shown in fig. 2, the ink including black particles is filled between the first substrate and the second substrate of the cartridge to form an ink structure layer.

In an exemplary embodiment, taking the second reflective structure and the retaining wall structure as an example, the manufacturing method may include steps 31 to 34:

Step 31: a first substrate and a second substrate are provided.

Step 32: as shown in fig. 8, a first reflective structure 30 is formed on the first substrate.

Step 33: as shown in fig. 9, a second reflective structure 31 and a wall structure 27 are formed on the second substrate.

In an exemplary embodiment, step 33 may include: the second reflecting structure and the retaining wall structure are prepared by adopting a nano-imprinting method. Therefore, the secondary reflection structure and the retaining wall are prepared simultaneously in a nano-imprinting mode, so that the difficulty of low contrast and low brightness of the CID device can be improved, and the process and technological difficulties are not increased.

Step 34: as shown in fig. 2, the ink including black particles is filled between the first substrate and the second substrate of the cartridge to form an ink structure layer.

For technical details not disclosed in the embodiments of the preparation method of the present disclosure, those skilled in the art will understand with reference to the description in the embodiments of the display panel of the present disclosure, and the details are not repeated here.

While the embodiments disclosed in the present disclosure are described above, the above description is only an embodiment adopted for the convenience of understanding the present disclosure, and is not intended to limit the present disclosure. Any person skilled in the art to which this disclosure pertains will appreciate that numerous modifications and changes in form and details can be made without departing from the spirit and scope of the disclosure, but the scope of the disclosure is to be determined by the appended claims.

Claims (11)

1. A reflective display panel, comprising: a first substrate and a second substrate arranged opposite to each other, and an ink structure layer between the first substrate and the second substrate; the ink structure layer includes: an ink including black microparticles;

Further comprises: a first reflecting structure and a second reflecting structure which are oppositely arranged, wherein the first reflecting structure is positioned on one side of the first substrate close to the second substrate and is configured to reflect part of light rays incident to the first reflecting structure to a direction close to the first substrate; the second reflecting structure is positioned on one side of the second substrate close to the first substrate and is configured to reflect the other part of light rays emitted from the first reflecting structure to the second reflecting structure towards the direction close to the first substrate;

the first reflective structure includes: the array-arranged multiple lenses and a first dielectric layer positioned on one side of the multiple lenses far away from the first substrate, wherein the refractive index of the first dielectric layer is larger than that of the ink, and the refractive index of the first dielectric layer is smaller than that of the black microparticles; the refractive index of the lens is the same as that of the first dielectric layer;

The second reflecting structure includes: at least one reflection post corresponding to at least one of the plurality of lenses and a reflection film located at a side of the at least one reflection post near the first substrate, wherein a refractive index of the reflection film is smaller than a refractive index of the ink;

Further comprises: the retaining wall structure is arranged between the first substrate and the second substrate, the retaining wall structure and the second reflecting structure are arranged on the same layer, the retaining wall structure is perpendicular to the plane of the reflecting display panel, and the height of the retaining wall structure and the height of the second reflecting structure meet the following relation: Wherein H represents the height of the retaining wall structure, and H represents the height of the second reflecting structure.

2. The reflective display panel of claim 1, wherein a surface of the first reflective structure adjacent to the second substrate is a first curved surface protruding toward a direction adjacent to the first substrate, and the first curved surface is a portion of a spherical surface.

3. The reflective display panel according to claim 2, wherein a surface of the second reflective structure adjacent to the first substrate is any one of a flat surface and a second curved surface, and the second curved surface is any one of a part of a spherical surface, a part of a conical surface, and an uneven surface.

4. The reflective display panel according to claim 3, wherein when the first curved surface and the second curved surface are both a part of a spherical surface, a diameter of the spherical surface where the first curved surface is located and a diameter of the spherical surface where the second curved surface is located satisfy the following relation:

wherein D represents the diameter of the sphere where the first curved surface is located, and D represents the diameter of the sphere where the second curved surface is located.

5. The reflective display panel of claim 1, further comprising: a filter layer between the first substrate and the first reflective structure, wherein,

The retaining wall structure comprises: a plurality of pixel opening regions and a light-impermeable region disposed between adjacent pixel opening regions;

the filter layer includes: a plurality of color filters and a light shielding layer disposed between the adjacent color filters, the shading layer corresponds to the opaque region, and the plurality of color filters correspond to the plurality of pixel opening regions.

6. The reflective display panel according to claim 5, wherein the number of reflective columns in the pixel opening area corresponding to the color filters of the same color in the plurality of color filters is the same, and/or the number of reflective columns in the pixel opening area corresponding to the color filters of at least two different colors in the plurality of color filters is different.

7. The reflective display panel of claim 5, wherein in at least one pixel opening area, a total number of reflective posts is less than a total number of lenses.

8. The reflective display panel of claim 5, wherein the material of the at least one reflective column is any one of an acrylic resin and an epoxy resin.

9. A display device, comprising: the reflective display panel of any one of claims 1 to 8.

10. A method for preparing a reflective display panel, the reflective display panel according to any one of claims 1 to 8, the manufacturing method comprising:

Providing a first substrate and a second substrate;

Forming a first reflecting structure and the retaining wall structure on the first substrate, and forming a second reflecting structure on the second substrate, or forming a first reflecting structure on the first substrate, and forming a second reflecting structure and the retaining wall structure on the second substrate;

And filling ink comprising black particles between the first substrate and the second substrate to form an ink structure layer.

11. The method of claim 10, wherein the second reflective structure and the retaining wall structure are fabricated using a nanoimprint method.