Display panel

Abstract

The present disclosure relates to the technical field of display, and in particular to a display panel, which comprises a first substrate, a light shielding structure, an electrophoretic structure and a plurality of electrode pairs. The light shielding structure is formed on the first substrate and surrounds to form a plurality of array-arranged containing cavities. A part of the electrophoretic structure is located in each containing cavity, and another part is formed on the side of the light shielding structure away from the first substrate. The electrophoretic structure comprises light-reflecting particles and light-absorbing particles with opposite charges. The electrode pairs correspond to the containing cavities one by one and are configured to apply a plurality of electric fields to the electrophoretic structure. Under a first electric field, the light-reflecting particles move to the side of the light-absorbing particles away from the first substrate, and the light-reflecting particles can shield the side of the light shielding structure away from the first substrate; under a second electric field, the light-reflecting particles move into the containing cavities and are located on the side of the light-absorbing particles away from the first substrate. The display panel in the present disclosure can realize dynamic display of wide and narrow viewing angle switching while improving the transmittance, resolution and display brightness.

Description

Technical Field

[0001] This disclosure belongs to the field of display technology, and specifically relates to a display panel. Background Technology

[0002] Privacy-protected e-paper display panels prevent others from peeping at the content being read or sensitive notifications. For example, when used in public places, the viewing angle of the e-paper display panel is limited to a certain angle to protect user privacy and prevent third-party peeping. However, some application scenarios require the e-paper to be in an open viewing angle to share information. Therefore, how to achieve dynamic display with switching between wide and narrow viewing angles while ensuring aperture ratio, resolution, and display brightness has become an urgent problem to be solved. Summary of the Invention

[0003] The purpose of this disclosure is to provide a display panel that can improve transmittance, resolution, and display brightness while achieving dynamic display with switching between wide and narrow viewing angles.

[0004] This disclosure provides a display panel, including:

[0005] First substrate; A light-shielding structure is formed on the first substrate, and the light-shielding structure surrounds a plurality of arrayed receiving cavities; An electrophoretic structure, a portion of which is located in each of the receiving cavities and another portion of which is formed on the side of the light-shielding structure away from the first substrate, the electrophoretic structure comprising reflective particles and light-absorbing particles with opposite charges; Multiple electrode pairs correspond one-to-one with the receiving cavity. The two electrodes of the electrode pairs are located on opposite sides of the electrophoretic structure and are configured to apply multiple electric fields to the electrophoretic structure. The multiple electric fields include at least a first electric field and a second electric field. Wherein: under the first electric field, the reflective particles move to the side of the light-absorbing particles away from the first substrate, and the reflective particles can block the side of the light-shielding structure away from the first substrate. Under the second electric field, the reflective particles move into the receiving cavity and are located on the side of the light-absorbing particles away from the first substrate.

[0006] In one exemplary embodiment of this disclosure, the electrophoresis structure includes a plurality of independent electrophoresis units, each corresponding to one of the receiving cavities; The electrophoresis unit includes a main body and a cover. The orthographic projection of the main body on the first substrate coincides with the orthographic projection of the corresponding receiving cavity on the first substrate. The cover protrudes from the peripheral surface of the main body and is disposed on the surface of the light-shielding structure away from the first substrate.

[0007] In one exemplary embodiment of this disclosure, the electrophoresis unit is disposed on the surface opposite to the first substrate, protruding in a direction away from the first substrate.

[0008] In one exemplary embodiment of this disclosure, the surface of the covering portion near the light-shielding structure is inclined, and in the direction close to the corresponding main body portion, the surface of the covering portion near the light-shielding structure is inclined towards the first substrate.

[0009] In one exemplary embodiment of this disclosure, the covering portion is located on opposite sides corresponding to the main body portion.

[0010] In one exemplary embodiment of this disclosure, the display panel includes a color resist layer, the color resist layer includes a plurality of color resist blocks and a light-shielding block disposed between two adjacent color resist blocks, and the orthogonal projection of the color resist blocks on the electrophoretic structure covers at least one electrophoretic unit.

[0011] In one exemplary embodiment of this disclosure, the color resist block corresponds one-to-one with the electrophoresis unit, and the orthographic projection of the color resist block on the electrophoresis structure covers the corresponding electrophoresis unit.

[0012] In one exemplary embodiment of this disclosure, the electrode pair includes a first electrode and a second electrode, wherein the first electrode is located on the side of the electrophoresis unit away from the first substrate, and the second electrode is located on the side of the electrophoresis unit close to the first substrate. The second electrodes in the display panel are spaced apart and embedded in the first substrate.

[0013] In one exemplary embodiment of this disclosure, the orthographic projection of the first electrode on the electrophoresis structure completely covers the corresponding main body portion and at least a portion of the corresponding cover portion, and the orthographic projection of the second electrode on the electrophoresis structure coincides with the orthographic projection of the corresponding main body portion on the electrophoresis structure.

[0014] In one exemplary embodiment of this disclosure, the mass of the light-absorbing particles is greater than the mass of the reflective particles; The multiple electric fields also include a third electric field; Wherein: under the third electric field, the light-absorbing particles are located on the side of the reflective particles away from the first substrate, and the orthogonal projection of the light-absorbing particles on the first substrate can at least completely cover the receiving cavity.

[0015] The technical solutions provided in this disclosure have at least the following advantages: Compared with related electronic paper technologies that "use the ink dots of the electronic paper itself as light-controlling materials to achieve privacy protection", the display panel in this disclosure can control the position of reflective and light-absorbing particles by adjusting the electric field on the electrophoretic structure, so as to achieve free switching of wide and narrow viewing angles of the display panel, which is suitable for both dynamic and static display of the display panel. At the same time, it can also improve the problem of ink black dots appearing at the pixel edges when the display panel is displayed at normal viewing angle.

[0016] Furthermore, compared with related electronic paper technologies that "divide normal pixels into two parts, one part with a privacy film for privacy display and the other part without a privacy film for normal viewing angle display", the display panel in this disclosure does not need to separate pixels and use a privacy film for privacy display on some of the separated pixels. All pixels in this disclosure can be displayed at a normal viewing angle, ensuring the transmittance and resolution of the display panel when displayed at a normal viewing angle. It also improves the problem of reduced brightness of ambient light incident on the electrophoretic structure caused by the privacy film, as well as the ambient light emitted after reflection by the electrophoretic structure, thereby improving the display brightness of the display panel, which is especially beneficial for the display panel in low-light environments.

[0017] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] Figure 1 A schematic diagram of a cross-sectional structure is shown in a wide-viewing-angle display panel according to an embodiment of this disclosure.

[0021] Figure 2 It shows Figure 1 A cross-sectional view of the central display panel with a narrow viewing angle.

[0022] Figure 3 It shows Figure 1 A partially enlarged schematic diagram of the electrophoresis unit.

[0023] Figure 4 This illustration shows another cross-sectional structure of the display panel in an embodiment of the present disclosure, with the view angle being wide.

[0024] Figure 5 It shows Figure 4 A cross-sectional view of the central display panel with a narrow viewing angle.

[0025] Figure 6 This illustration shows another cross-sectional structure of the display panel in a wide-viewing-angle display according to an embodiment of the present disclosure.

[0026] Figure 7 It shows Figure 6 A cross-sectional view of the central display panel with a narrow viewing angle.

[0027] Explanation of reference numerals in the attached figures: 11. First substrate; 12. Second electrode; 2. Light-shielding part; 21. Receiving cavity; 3. Electrophoresis unit; 31. Light-absorbing particle; 32. Reflective particle; 33. Main body; 34. Covering part; 35. Transparent isolation cover; 41. First electrode; 42. Second substrate; 43. Color resist block; 44. Light-shielding block; y, first direction; x, second direction. Detailed Implementation

[0028] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0029] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0030] The present disclosure will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0031] In current e-paper, normal pixels are typically divided into two parts: one part is covered with a privacy screen for privacy display, and the other part is without a privacy screen for normal viewing angle display. This structure can effectively switch between wide and narrow viewing angles, but this design has some problems: 1. Separating the display of a single pixel reduces the resolution and aperture ratio of each display state, affecting brightness and image quality; 2. Simply adding a privacy screen to the privacy pixel part affects both the incident light and the outgoing light after reflection, which will significantly reduce the brightness of the privacy display, which is detrimental to low-light environments.

[0032] In addition, some e-paper technologies use the ink dots of the electro-wetting e-paper itself as a light-controlling material to achieve privacy protection. This design has several problems: 1. It can only achieve steady-state or static display, not dynamic display, because the ink can only achieve privacy protection if it is fixed in a specific area. In dynamic display, the ink needs to move dynamically, which cannot guarantee the privacy protection effect; 2. Electro-wetting e-paper has low resolution and inherently has ink dot problems. This design requires at least a higher resolution to ensure that the ink achieves privacy protection instead of leaving black lines around the edges.

[0033] To solve the above technical problems, such as Figure 1-3 As shown, this disclosure provides a display panel that may include: a first substrate 11, a light-shielding structure, an electrophoretic structure, and a plurality of electrode pairs. The light-shielding structure has light-absorbing properties and is formed on the first substrate 11, surrounding a plurality of arrayed receiving cavities 21. A portion of the electrophoretic structure is located in each receiving cavity 21, and another portion is formed on the side of the light-shielding structure away from the first substrate 11. The electrophoretic structure includes reflective particles 32 and light-absorbing particles 31 with opposite charges. The electrode pairs correspond one-to-one with the receiving cavities 21, with the two electrodes of each electrode pair located on opposite sides of the electrophoretic structure and configured to apply multiple electric fields to the electrophoretic structure, the multiple electric fields including at least a first electric field and a second electric field.

[0034] The direction perpendicular to the light-emitting surface of the display panel is defined as the first direction y. The receiving cavity 21 can be configured to penetrate the light-shielding structure along the first direction y to reduce the material consumption of the light-shielding structure. However, it is not limited to this; the receiving cavity 21 may not penetrate the light-shielding structure. In this case, a light-shielding structure of a certain thickness is formed between the receiving cavity 21 and the first substrate 11, making the image darker when the display panel displays black, thus improving the display effect.

[0035] It should be understood that the electrophoretic structure has multiple reflective particles 32 and multiple absorbent particles 31. The reflective particles 32 are reflective and are configured to reflect ambient light, while the absorbent particles 31 are absorbent and are configured to absorb ambient light.

[0036] In this configuration: Under the first electric field, the reflective particles 32 move to the side of the light-absorbing particles 31 that is away from the first substrate 11, and the reflective particles 32 can also block the side of the light-shielding structure that is away from the first substrate 11. When ambient light shines from the light-emitting surface of the display panel onto any position on the electrophoretic structure, the ambient light is directly reflected by the reflective particles 32 and emitted back to the light-emitting surface of the display panel to achieve image display. At this time, the display panel is a wide-viewing-angle display (also known as a normal-viewing-angle display, or a shared-viewing-angle display).

[0037] Under the second electric field, the reflective particles 32 move into the receiving cavity 21 and are located on the side of the light-absorbing particles 31 that is away from the first substrate 11. When ambient light shines on the reflective particles 32 and is reflected, the large-angle reflected light is absorbed by the light-shielding structure on the side of the receiving cavity 21, while the small-angle reflected light can be emitted to the light-emitting surface of the display panel to achieve image display. At this time, the display panel is a narrow viewing angle display (also known as a privacy viewing angle display).

[0038] Compared with the aforementioned electronic paper technology that "uses the ink dots of the electronic paper itself as light-controlling materials to achieve privacy protection", the display panel in this disclosure can control the position of reflective particles 32 and light-absorbing particles 31 by adjusting the electric field on the electrophoretic structure, so as to achieve free switching of wide and narrow viewing angles of the display panel, which is suitable for both dynamic and static display of the display panel. At the same time, it can also improve the problem of ink black dots appearing at the pixel edges when the display panel is displayed at a normal viewing angle.

[0039] Furthermore, compared with the aforementioned electronic paper technologies that "divide normal pixels into two parts, one part with a privacy film for privacy display, and the other part without a privacy film for normal viewing angle display," the display panel in this disclosure does not require pixel separation and privacy film for some of the separated pixels. All pixels in this disclosure can be displayed at a normal viewing angle, ensuring the transmittance and resolution of the display panel at a normal viewing angle. It also improves the problem of reduced brightness of ambient light incident on the electrophoretic structure caused by the privacy film, as well as the ambient light emitted after reflection by the electrophoretic structure, thereby improving the display brightness of the display panel, which is especially beneficial for the display panel in low-light environments.

[0040] In some embodiments, the electrophoresis structure may include a plurality of independent electrophoresis units 3, each corresponding to a receiving cavity 21.

[0041] The electrophoresis unit 3 may include a main body 33 and a cover 34. The orthographic projection of the main body 33 on the first substrate 11 coincides with the orthographic projection of the corresponding receiving cavity 21 on the first substrate 11. The cover 34 protrudes from the peripheral surface of the main body 33 and is disposed on the surface of the light-shielding structure away from the first substrate 11. The main body 33 and the cover 34 are connected to form the electrophoresis unit 3. The reflective particles 32 and the light-absorbing particles 31 can move freely within the main body 33 and the cover 34 of the electrophoresis unit 3.

[0042] For example, in this disclosure, after a light-shielding structure is formed on the first substrate 11, the separation of each electrophoresis unit 3 is achieved by a transparent isolation cover 35. In this case, the transparent isolation cover 35 is at least partially erected on the surface of the light-shielding structure away from the first substrate 11.

[0043] This disclosure improves the problem of uneven distribution of reflective particles 32 and light-absorbing particles 31 in each cavity 21 when each cavity 21 is interconnected and the display panel is a narrow viewing angle display, by making each electrophoretic unit 3 independent of each other and corresponding one-to-one with the cavity 21. This ensures the uniformity of the light output brightness of the electrophoretic unit 3 corresponding to each cavity 21 when the display panel is a narrow viewing angle display, thereby improving the overall display effect of the display panel.

[0044] In some embodiments, the electrophoresis unit 3 is disposed on the surface away from the first substrate 11 and protrudes in a direction away from the first substrate 11.

[0045] For example, such as Figure 4-5 As shown, when the separation between each electrophoresis unit 3 is achieved by the transparent isolation cover 35, the surface of the transparent isolation cover 35 away from the first substrate 11 can be convex in a direction away from the first substrate 11. Under the shared display viewing angle, reflective particles 32 gather on the side of the transparent isolation cover 35 away from the first substrate 11 and form a convex mirror structure convex in a direction away from the first substrate 11.

[0046] Compared to the technical solution where the side of the transparent shield 35 away from the first substrate 11 is parallel to the first substrate 11, this disclosure can increase the viewing angle width of the display panel under a shared viewing angle, allowing more participants to clearly see the screen content from different angles and reducing color distortion or brightness attenuation caused by viewing angle shift. Since the light illumination angle is smaller under narrow viewing angle displays, the protrusion of the electrophoresis unit 3 away from the first substrate 11 has a smaller impact on the display angle under narrow viewing angles.

[0047] In some embodiments, the surface of the cover portion 34 near the light-shielding structure is inclined, and in the direction near the corresponding main body portion 33, the surface of the cover portion 34 near the light-shielding structure is inclined toward the first substrate 11. That is, in the direction away from the first substrate 11, the cross-sectional area of ​​the portion of the cover portion 34 near the main body portion 33 increases.

[0048] Specifically, the light-shielding structure may include multiple light-shielding portions 2 arranged in an array, with a receiving cavity 21 formed between adjacent light-shielding portions 2. When preparing the light-shielding structure, the surface of the light-shielding portion 2 away from the first substrate 11 may be inclined, and in the direction close to the center of the corresponding electrophoresis unit 3, the surface of the light-shielding portion 2 away from the first substrate 11 is inclined towards the first substrate 11, so that the cross-sectional area of ​​the portion of the covering portion 34 near the main body portion 33 increases in the direction away from the first substrate 11.

[0049] When the surface of the light-shielding part 2 away from the first substrate 11 is inclined, the inclined surface can play a guiding role. When the reflective particles 32 or the light-absorbing particles 31 are driven to move from the side of the light-shielding structure away from the first substrate 11 into the receiving groove, the problem that the reflective particles 32 and the light-absorbing particles 31 cannot move completely into the receiving cavity 21 due to being stuck on the surface of the light-shielding structure away from the first substrate 11 can be improved, resulting in poor wide and narrow viewing angle display effect. At the same time, the speed of the reflective particles 32 and the light-absorbing particles 31 when moving into the receiving cavity 21 can be increased, thereby improving the response speed of the display panel when switching between wide and narrow viewing angles can be improved.

[0050] like Figure 6-7 As shown, when the covering portion 34 of two adjacent electrophoresis units 3 is disposed on the same light-shielding portion 2 away from the first substrate 11, two inclined surfaces with different inclination angles can be disposed at one end of the light-shielding portion 2 away from the first substrate 11: in the direction close to the center of each electrophoresis unit 3, the two inclined surfaces are inclined towards the direction close to the first substrate 11, so as to guide the reflective particles 32 and light-absorbing particles 31 in each electrophoresis unit 3 to move to the receiving cavity 21.

[0051] Furthermore, the angle between the surface of the light-shielding part 2 away from the first substrate 11 (i.e., the inclined surface) and the light-emitting surface of the display panel can be in the range of 30°~60°, so that the reflective particles 32 and the light-absorbing particles 31 can move from the side of the light-shielding structure away from the first substrate 11 into the receiving groove.

[0052] For example, the angle between the surface of the light-shielding part 2 away from the first substrate 11 (i.e., the inclined surface) and the light-emitting surface of the display panel can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc., and can be determined according to the actual situation.

[0053] In some embodiments, the cover portion 34 is located on opposite sides of the corresponding main body portion 33.

[0054] For example, multiple electrophoretic units 3 are arranged along the second direction x, and the opposite sides of the transparent shield 35 are placed on the surfaces of the two adjacent light-shielding parts 2 in the second direction x away from the first substrate 11, so as to form a covering part 34 on the opposite sides of the main body 33 in the second direction x, thereby realizing double-sided privacy protection of the display panel.

[0055] However, this disclosure also allows the cover portion 34 to be located on one side of the main body portion 33 in the second direction x, so as to achieve single-sided privacy protection for the display panel.

[0056] Alternatively, the cover 34 can be arranged to surround the main body 33, so that the display panel can achieve multi-directional privacy protection.

[0057] In some embodiments, the display panel may include a color resist layer located on the side of the electrophoresis unit 3 away from the first substrate 11. The color resist layer may include a plurality of color resist blocks 43, each color resist block 43 corresponding to at least one electrophoresis unit 3; that is, the orthographic projection of the color resist block 43 onto the electrophoresis structure can cover at least one electrophoresis unit 3. The color resist blocks 43 are configured to filter light, thereby enabling the display panel to achieve color display.

[0058] For example, the color resist layer may include red color resist block 43, green color resist block 43 and blue color resist block 43, with the three colors of color resist blocks 43 alternating and arranged in an array.

[0059] In this disclosure, the color resist block 43 can correspond one-to-one with the electrophoretic unit 3, and the orthogonal projection of the color resist block 43 on the electrophoretic structure covers the corresponding electrophoretic unit 3. Thus, by adjusting the voltage of the electrode pair, the display color of each sub-pixel of the display panel (the sub-pixel corresponds one-to-one with the color resist block 43) can be precisely controlled, thereby improving the problems of light crosstalk, color crosstalk, color mixing, and edge blurring between adjacent sub-pixels.

[0060] In addition, the color resist layer may also include a light-blocking block 44, which has light-blocking properties and is disposed between two adjacent color resist blocks 43 to improve the color crosstalk problem between two adjacent sub-pixels and improve display contrast and resolution.

[0061] In some embodiments, the electrode pair may include a first electrode 41 and a second electrode 12, wherein the first electrode 41 is located on the side of the corresponding electrophoresis unit 3 away from the first substrate 11, and the second electrode 12 is located on the side of the corresponding electrophoresis unit 3 close to the first substrate 11.

[0062] In this way, the multiple second electrodes 12 in the display panel can be spaced apart, and / or the multiple first electrodes 41 in the display panel can be spaced apart, so that the electric field magnitude in each electrophoresis unit 3 can be adjusted independently, and the movement of reflective particles 32 and light-absorbing particles 31 in each electrophoresis unit 3 can be precisely controlled to achieve wide and narrow viewing angle switching of the entire display panel or each local area.

[0063] For example, the multiple second electrodes 12 in the display panel can be spaced apart, while the multiple first electrodes 41 in the display panel can be spaced apart from each other, so as to reduce the electric field coupling between adjacent electrodes and improve problems such as grayscale crosstalk, color shift, and flicker.

[0064] Alternatively, the multiple second electrodes 12 in the display panel can be spaced apart, while the multiple first electrodes 41 in the display panel can be interconnected. For example, the multiple first electrodes 41 in the display panel can form a common electrode that can cover multiple electrophoresis units, thereby simplifying the manufacturing process of the first electrodes 41, improving manufacturing efficiency, and reducing manufacturing costs.

[0065] In some embodiments, the orthographic projection of the first electrode 41 onto the electrophoretic structure can completely cover at least a portion of the corresponding main body 33 and the corresponding covering portion 34, so as to ensure that when the electrophoretic particles (i.e., at least one of the reflective particles 32 and the light-absorbing particles 31) move to the side of the electrophoretic unit 3 away from the first substrate 11 under the action of the electric field, the electrophoretic particles can at least completely cover the receiving cavity 21 and at least a portion of the surface of the light-shielding structure away from the first substrate 11, so as to achieve the corresponding wide viewing angle display (when the electrophoretic particles that move to the side of the electrophoretic unit 3 away from the first substrate 11 are reflective particles 32) or black display (when the electrophoretic particles that move to the side of the electrophoretic unit 3 away from the first substrate 11 are light-absorbing particles 31).

[0066] Furthermore, the orthographic projection of the first electrode 41 onto the electrophoretic structure can completely cover the corresponding electrophoretic unit 3, so as to maximize the distribution range of the electric field on the side of the electrophoretic unit 3 away from the first substrate 11. When the electrophoretic particles move to the side of the electrophoretic unit 3 away from the first substrate 11, they can be evenly distributed on the side of the electrophoretic unit 3 away from the first substrate 11, thereby improving the wide and narrow viewing angle display effect.

[0067] Furthermore, the orthographic projection of the second electrode 12 on the electrophoretic structure can coincide with the orthographic projection of the corresponding main body 33 on the electrophoretic structure. The second electrode 12 forms an electric field in the corresponding area of ​​the main body 33. When the electrophoretic particles move towards the side closer to the first substrate 11, the electrophoretic particles can be concentrated and moved into the receiving cavity 21 under the action of the electric field, thereby increasing the rate at which the electrophoretic particles move into the receiving cavity 21 and improving the response speed when the display panel switches between wide and narrow display viewing angles.

[0068] In this disclosure, the first substrate 11 is an array substrate, which can be used to fabricate structures such as control circuits and the second electrode 12. The second electrode 12 can be embedded in the first substrate 11 to reduce the overall thickness of the display panel.

[0069] The display panel may further include a second substrate 42, which may be a color filter substrate for fabricating structures such as a color resist layer and a first electrode 41. The first electrode 41 may be embedded within the second substrate 42 to reduce the overall thickness of the display panel. The color resist layer may be located on the side of the second substrate 42 opposite to the electrophoretic structure.

[0070] In some embodiments, the mass of the light-absorbing particle 31 may be greater than the mass of the reflective particle 32.

[0071] For example, the light-absorbing particles 31 and the reflective particles 32 in this disclosure have the same volume, but the density of the light-absorbing particles 31 is greater than the density of the reflective particles 32. The light-absorbing particles 31 and the reflective particles 32 have the same charge.

[0072] Taking the positively charged light-absorbing particles 31 and the negatively charged reflective particles 32 as an example: the first electrode 41 can be controlled to apply a positive charge, attracting the reflective particles 32 to move to the side of the electrophoresis unit 3 away from the first substrate 11 and distribute them evenly. The reflective particles 32 can form an integral reflective structure on the side of the electrophoresis unit 3 away from the first substrate 11. When ambient light is incident on the electrophoresis unit 3, it is directly reflected by the reflective particles 32 and directly emitted to the light-emitting surface of the display panel. At this time, the display panel is a shared viewing angle display.

[0073] In addition, a certain positive charge can be applied to the second electrode 12 to attract the reflective particles 32 to move to the side of the electrophoresis unit 3 close to the first substrate 11. Applying a positive charge will simultaneously repel the light-absorbing particles 31. Therefore, in the design, the mass or density of the light-absorbing particles 31 is selected to be greater than that of the reflective particles 32. Then, under the same charge force, the reflective particles 32 will be attracted to the side of the electrophoresis unit 3 close to the first substrate 11, but the light-absorbing particles 31 will not be pushed by the reflective particles 32. At this time, both the light-absorbing particles 31 and the reflective particles 32 are located in the receiving cavity 21, and the reflective particles 32 are located on the side of the light-absorbing particles 31 away from the first substrate 11. After the ambient light enters the electrophoresis unit 3 and is reflected, the large-angle reflected light is absorbed by the light-shielding structure, and the small-angle reflected light can be emitted to the light-emitting surface of the display panel, thereby realizing the privacy display of the display panel.

[0074] In this disclosure, the electrode pair can also form a third electric field in the electrophoretic structure, wherein: under the third electric field, the light-absorbing particle 31 is located on the side of the reflective particle 32 away from the first substrate 11, and the orthogonal projection of the light-absorbing particle 31 on the first substrate 11 can at least completely cover the receiving cavity 21, at which time the display panel is black.

[0075] It should be noted that the electric field direction of the third electric field is the same as that of the second electric field. However, the electric field strength of the third electric field is greater than that of the second electric field, so as to increase the electric field force on the light-absorbing particles 31, so that the light-absorbing particles 31 can move towards the side of the electrophoresis unit 3 away from the first substrate 11 under the action of the electric field force.

[0076] In addition to making the electrophoresis unit 3 correspond one-to-one with the receiving cavity 21, the electrophoresis unit 3 in this disclosure can also correspond to multiple receiving cavities 21.

[0077] For example, the electrophoresis unit 3 can correspond to two receiving cavities 21, in which case the light-absorbing particles 31 and the light-reflecting particles 32 in the electrophoresis unit 3 can move freely within the corresponding two receiving cavities 21. However, it is not limited to this; the electrophoresis unit 3 can also correspond to three, four, or even more receiving cavities 21, which can be set according to the actual situation.

[0078] In the description of this specification, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise expressly specified.

[0079] Furthermore, it should be noted that terms such as "upper," "lower," "left," and "right" are used only for distinction and convenience of description, and do not impose any positional limitations on the embodiments of the present invention. For example, "upper" in practice can refer to "lower," "left," or "right." In this disclosure, unless otherwise explicitly specified and limited, terms such as "assembly" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this disclosure can be understood according to the specific circumstances.

[0080] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Therefore, any changes or modifications made in accordance with the claims and description of the present disclosure should fall within the scope of the patent coverage of the present disclosure.

Claims

1. A display panel, characterized in that, include: First substrate; A light-shielding structure is formed on the first substrate, and the light-shielding structure surrounds a plurality of arrayed receiving cavities; An electrophoretic structure, a portion of which is located in each of the receiving cavities and another portion of which is formed on the side of the light-shielding structure away from the first substrate, the electrophoretic structure comprising reflective particles and light-absorbing particles with opposite charges; Multiple electrode pairs correspond one-to-one with the receiving cavity. The two electrodes of the electrode pairs are located on opposite sides of the electrophoretic structure and are configured to apply multiple electric fields to the electrophoretic structure. The multiple electric fields include at least a first electric field and a second electric field. Wherein: under the first electric field, the reflective particles move to the side of the light-absorbing particles away from the first substrate, and the reflective particles can block the side of the light-shielding structure away from the first substrate. Under the second electric field, the reflective particles move into the receiving cavity and are located on the side of the light-absorbing particles away from the first substrate; The electrophoresis structure includes multiple independent electrophoresis units, each corresponding to a receiving cavity. Each electrophoresis unit includes a main body and a cover. The orthographic projection of the main body on the first substrate coincides with the orthographic projection of the corresponding receiving cavity on the first substrate. The cover protrudes from the peripheral surface of the main body and is disposed on the surface of the light-shielding structure away from the first substrate.

2. The display panel according to claim 1, characterized in that, The electrophoresis unit is positioned so that the surface opposite to the first substrate protrudes in a direction away from the first substrate.

3. The display panel according to claim 1, characterized in that, The surface of the covering portion near the light-shielding structure is inclined, and in the direction close to the corresponding main body portion, the surface of the covering portion near the light-shielding structure is inclined towards the first substrate.

4. The display panel according to claim 1, characterized in that, The covering portion is located on opposite sides of the main body portion.

5. The display panel according to claim 1, characterized in that, The display panel includes a color resist layer, which includes a plurality of color resist blocks and a light-shielding block disposed between two adjacent color resist blocks. The orthogonal projection of the color resist blocks on the electrophoretic structure covers at least one electrophoretic unit.

6. The display panel according to claim 5, characterized in that, Each color resist block corresponds to one of the electrophoretic units, and the orthogonal projection of the color resist block on the electrophoretic structure covers the corresponding electrophoretic unit.

7. The display panel according to claim 1, characterized in that, The electrode pair includes a first electrode and a second electrode, wherein the first electrode is located on the side of the electrophoresis unit away from the first substrate, and the second electrode is located on the side of the electrophoresis unit close to the first substrate. The second electrodes in the display panel are spaced apart and embedded in the first substrate.

8. The display panel according to claim 7, characterized in that, The orthographic projection of the first electrode on the electrophoresis structure completely covers the corresponding main body portion and at least a portion of the corresponding covering portion, and the orthographic projection of the second electrode on the electrophoresis structure coincides with the orthographic projection of the corresponding main body portion on the electrophoresis structure.

9. The display panel according to claim 1, characterized in that, The mass of the light-absorbing particles is greater than the mass of the light-reflecting particles; The multiple electric fields also include a third electric field; Wherein: under the third electric field, the light-absorbing particles are located on the side of the reflective particles away from the first substrate, and the orthogonal projection of the light-absorbing particles on the first substrate can at least completely cover the receiving cavity.

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