Display panel and display device

Abstract

A display panel (10) and a display device (100). The display panel (10) comprises: a first substrate (1) and a second substrate (2) opposite to each other in the thickness direction of the display panel (10), and isolation retaining walls (3). The first substrate (1) is located on a display side, and the second substrate (2) is located on a non-display side; The isolation retaining walls (3) are arranged between the first substrate (1) and the second substrate (2) to define cavities for display units, and the cavities are filled with a liquid material for display. Each isolation retaining wall (3) comprises a first retaining wall (31) and a second retaining wall (32) arranged in the thickness direction of the display panel (10) and connected to each other, the first retaining wall (31) is close to the display side, and the second retaining wall (32) is close to the non-display side. The area of the cross section of the first retaining wall (31) is less than the area of the cross section of the second retaining wall (32), and the cross sections are perpendicular to the thickness direction of the display panel (10).

Description

Display panel and display device TECHNICAL FIELD

[0001] At least one embodiment of the present disclosure provides a display panel and a display device. BACKGROUND

[0002] Reflective display devices are device structures that display using natural light, and can clearly display in strong light, weak light, and using ambient light. Reflective display devices have the advantages of low driving voltage, energy saving, and less damage to the eyes. Current reflective display devices can be divided into capsule type and ink type according to the material system.

[0003] Ink-type reflective display devices achieve black and white display through particles in ink. Because ink has fluidity characteristics, ink-type reflective display devices need reflective micro-cups to ensure the number of particles in the pixel area to ensure display effect.

[0004] SUMMARY

[0005] At least one embodiment of the present disclosure provides a display panel, which includes a first substrate and a second substrate opposite to each other in a display panel thickness direction, and an isolation barrier wall. The first substrate is located on the display side, and the second substrate is located on the non-display side. The isolation barrier wall is arranged between the first substrate and the second substrate, and defines a cavity of a display unit. The cavity is filled with a liquid material for display. The isolation barrier wall includes a first barrier wall and a second barrier wall arranged in the display panel thickness direction and connected to each other. The first barrier wall is close to the display side, and the second barrier wall is close to the non-display side. The cross-sectional area of the first barrier wall is smaller than the cross-sectional area of the second barrier wall, and the cross section is perpendicular to the display panel thickness direction.

[0006] For example, in the display panel provided by at least one embodiment of the present disclosure, the height of the first barrier wall in the display panel thickness direction is smaller than the height of the second barrier wall in the display panel thickness direction.

[0007] For example, in the display panel provided by at least one embodiment of the present disclosure, the display unit further comprises a first electrode disposed on the first substrate and a second electrode disposed on the second substrate; the second electrode comprises a first sub-electrode, a second sub-electrode and a third sub-electrode arranged at intervals with each other; the display panel comprises a plurality of display units, and the plurality of display units comprise a first display unit, a second display unit and a third display unit arranged adjacently and sequentially; the isolation barrier wall comprises a first part isolating the first display unit and the second display unit and a second part isolating the first display unit and the second display unit, and the first part and the second part both have the first barrier wall and the second barrier wall; the first sub-electrode is close to the first part, the third sub-electrode is close to the second part, and the second sub-electrode is located between the first sub-electrode and the third sub-electrode.

[0008] For example, in the display panel provided by at least one embodiment of the present disclosure, the liquid material comprises a light-transmitting liquid and the display particles located in the light-transmitting liquid, and the display particles are charged light-blocking particles; opposite voltages are applied to the first electrode and the second electrode to form a first electric field, under the action of the first electric field, the light-blocking particles are laid and stacked on a side of the cavity close to the first substrate to block light, thereby realizing the non-display state; different voltages are applied to the first sub-electrode, the second sub-electrode and the third sub-electrode to form a second electric field, under the action of the second electric field, the light-blocking particles move to a side of the cavity close to the second substrate and adhere to the vicinity of the first sub-electrode and the third sub-electrode, so that light transmits from the display side, thereby realizing the display state; in the display state, the height of the light-blocking particles in the thickness direction of the display panel is lower than the height of the first barrier wall in the thickness direction of the display panel.

[0009] For example, in the display panel provided by at least one embodiment of the present disclosure, the liquid material includes a light-transmitting liquid and the display particles in the light-transmitting liquid, the display particles include charged light-blocking particles and charged light-reflecting particles, the light-blocking particles and the light-reflecting particles have opposite charge properties; opposite voltages are applied to the first electrode and the second electrode to form a first electric field, under the action of the first electric field, the light-blocking particles are laid and stacked on the side of the cavity close to the first substrate to block light, and the light-reflecting particles are laid and stacked on the side of the cavity close to the second substrate, so as to realize the non-display state; the properties of the voltages applied to the first electrode and the second electrode in the non-display state are inversed, and different voltages are applied to the first sub-electrode, the second sub-electrode and the third sub-electrode to form a third electric field, under the action of the third electric field, the light-blocking particles move to the side of the cavity close to the second substrate and adhere to the vicinity of the first sub-electrode and the third sub-electrode to make light transmit from the display side, and the light-reflecting particles are laid and stacked on the side of the cavity close to the first substrate to reflect light from the display side to emit from the display side of the display panel, so as to realize the display state; in the display state, the height of the light-blocking particles in the thickness direction of the display panel is lower than the height of the first barrier wall in the thickness direction of the display panel.

[0010] For example, in the display panel provided by at least one embodiment of the present disclosure, the display unit further includes a first electrode arranged on the first substrate and a second electrode arranged on the second substrate; the liquid material includes a light-blocking liquid and the display particles in the light-blocking liquid, the display particles are light-reflecting particles; opposite voltages are applied to the first electrode and the second electrode to form a first electric field, under the action of the first electric field, the light-reflecting particles are laid and stacked on the side of the cavity close to the first substrate to reflect light from the display side to emit from the display side of the display panel, so as to realize the display state; the properties of the voltages applied to the first electrode and the second electrode in the non-display state are inversed to form a fourth electric field, under the action of the fourth electric field, the light-reflecting particles are laid and stacked on the side of the cavity close to the second substrate and adhere to the vicinity of the first sub-electrode and the third sub-electrode to make light transmit from the display side, so as to realize the display state.

[0011] For example, in the display panel provided by at least one embodiment of the present disclosure, the liquid material comprises display particles, and under the action of an electric field, the display particles are stacked on the side of the cavity close to the first substrate in a display state or a non-display state; the height of the first barrier wall in the thickness direction of the display panel is greater than the saturated stacking thickness of the display particles, which refers to the thickness of the display particles stacked on the side of the cavity close to the first substrate in the display state to achieve the highest light output rate, or the thickness of the display particles stacked on the side of the cavity close to the first substrate in the non-display state to achieve the lowest light transmittance.

[0012] For example, in the display panel provided by at least one embodiment of the present disclosure, when the display particles comprise light-blocking particles, the particle size of the light-blocking particles is 300 nm to 500 nm, and the number of layers of the light-blocking particles to achieve the saturated stacking thickness of the display particles is 2 layers.

[0013] For example, in the display panel provided by at least one embodiment of the present disclosure, when the display particles comprise light-blocking particles, the particle size of the light-blocking particles is 300 nm to 500 nm, and the number of layers of the light-blocking particles to achieve the saturated stacking thickness of the display particles is 2 layers.

[0014] For example, in the display panel provided by at least one embodiment of the present disclosure, the first sub-electrode, the second sub-electrode and the third sub-electrode are located on the side of the isolation barrier wall away from the first substrate; the first sub-electrode overlaps or does not overlap with the first part in the thickness direction of the display panel; and the third sub-electrode overlaps or does not overlap with the second part in the thickness direction of the display panel.

[0015] For example, in the display panel provided by at least one embodiment of the present disclosure, the widths of the first sub-electrode, the second sub-electrode and the third sub-electrode in the arrangement direction thereof are equal, and are distributed at equal intervals; and the ratio of the width to the interval ranges from 13 / 20 to 20 / 10.

[0016] For example, in the display panel provided by at least one embodiment of the present disclosure, in one display unit, the second sub-electrode is located on the side of the isolation barrier wall away from the first substrate, the first sub-electrode is located on the side wall of the second barrier wall of the first part, the side wall faces the second part of the isolation barrier wall, and the second sub-electrode is located on the side wall of the second barrier wall of the second part, the side wall faces the first part of the isolation barrier wall; the width of the first sub-electrode and the width of the third sub-electrode are both less than the width of the second sub-electrode.

[0017] For example, in the display panel provided by at least one of the embodiments of the present disclosure, for the first part of the isolation barrier wall, the third sub-electrode of the first display unit covers a first sidewall of the second barrier wall of the first part, the first sub-electrode of the second display unit covers a second sidewall of the second barrier wall of the first part, and the third sub-electrode of the first display unit and the first sub-electrode of the second display unit are spaced apart from each other to be insulated, the first sidewall and the second sidewall are opposite to each other in the arrangement direction of the first sub-electrode, the second sub-electrode and the third sub-electrode; the display substrate further comprises a first insulating layer covering the third sub-electrode of the first display unit, the first sub-electrode of the second display unit and the upper surface of the second barrier wall of the first part away from the second substrate.

[0018] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the third sub-electrode of the first display unit and the first sub-electrode of the second display unit also cover part of the upper surface of the second barrier wall of the first part away from the second substrate.

[0019] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the display substrate further comprises a second insulating layer covering the second sub-electrode, a first via hole and a second via hole penetrating through the second insulating layer, a first connecting electrode located in the first via hole, a second connecting electrode located in the second via hole, and a driving circuit layer located on the side of the second sub-electrode away from the second substrate, the first sub-electrode and the third sub-electrode are electrically connected to the driving circuit through the first connecting electrode and the second connecting electrode respectively.

[0020] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the display panel further comprises a first pin and a second pin, the first pin is located on the side of the first sub-electrode close to the first substrate and is electrically connected to the first sub-electrode, the second pin is located on the side of the third sub-electrode close to the second substrate and is electrically connected to the third sub-electrode, the first pin is electrically connected to the first connecting electrode, and the second pin is electrically connected to the second connecting electrode.

[0021] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the first end of the first barrier wall is arranged on the first substrate, the first end of the second barrier wall is arranged on the second substrate, and the second end of the first barrier wall is connected to the second end of the second barrier wall; the lower surface of the second end of the first barrier wall is attached to the upper surface of the second end of the second barrier wall, one of the lower surface of the second end of the first barrier wall and the upper surface of the second end of the second barrier wall is a flat plane, and the other is a flat plane or a smooth curved surface.

[0022] For example, in the display panel provided by at least one of the embodiments of the present disclosure, in the case where the lower surface of the second end of the first barrier wall and the upper surface of the second end of the second barrier wall are both flat planes,

[0023] The cross section of the first barrier wall along the thickness direction of the display panel is rectangular, and the cross section of the second barrier wall along the thickness direction of the display panel is rectangular; or the cross section of the first barrier wall along the thickness direction of the display panel is rectangular, and the cross section of the second barrier wall along the thickness direction of the display panel is a right trapezoid.

[0024] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the display panel further comprises a black matrix, the black matrix is located on the first substrate and is located on the side of the isolation barrier wall away from the second substrate, and the orthographic projection of the first barrier wall on the surface of the first substrate is located in the orthographic projection of the black matrix on the surface of the first substrate.

[0025] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the display panel further comprises a reflection structure, the reflection structure is located on the side of the isolation barrier wall close to the second substrate, and the orthographic projection of the reflection structure on the surface of the second substrate overlaps with the orthographic projection of the isolation barrier wall on the surface of the second substrate; the reflection structure is configured to reflect the light incident on the reflection structure back to the display unit.

[0026] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the reflection structure is internally filled with scattering particles, and the scattering particles are configured to scatter incident light.

[0027] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the material of the scattering particles is TiO2.

[0028] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the cross section of the reflection structure along the thickness direction of the display panel is a right trapezoid.

[0029] For example, in the display panel provided by at least one of the embodiments of the present disclosure, the display panel further comprises a third insulating layer, a scattering layer and a reflection layer; the reflection structure is located in the third insulating layer; the scattering layer is located on the side of the reflection structure close to the second substrate and is configured to scatter incident light; and the reflection layer is located on the side of the scattering layer close to the second substrate and is configured to reflect incident light.

[0030] At least one of the embodiments of the present disclosure further provides a display device, which comprises any one of the display panels provided by the embodiments of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the embodiments of the present disclosure and not limit the present disclosure.

[0032] FIG. 1 is a schematic diagram of a twisted isolation barrier of a display panel;

[0033] FIG. 2 is a schematic diagram of a structure of a display panel according to an embodiment of the present disclosure;

[0034] FIG. 3 is a schematic diagram of the display panel in FIG. 2 in a display state;

[0035] FIG. 4 is a schematic diagram of the display panel in FIG. 2 in a non-display state;

[0036] FIG. 5 is a schematic diagram of a partial isolation barrier of a display panel according to an embodiment of the present disclosure;

[0037] FIG. 6 is an effect diagram of a display panel according to an embodiment of the present disclosure in a display state under different sub-electrode width conditions;

[0038] FIG. 7 is a curve diagram of reflectivity of light under different numbers of stacked light shielding particles in a non-display state for display panels with different cell thicknesses;

[0039] FIG. 8 is an effect diagram of a display panel according to an embodiment of the present disclosure under a condition that the aspect ratio of the isolation barrier is greater than a limit value;

[0040] FIG. 9 is a schematic diagram of a cross section of a first barrier of a display panel according to an embodiment of the present disclosure;

[0041] FIGS. 10-12 are schematic diagrams of cross sections of several different isolation barriers according to embodiments of the present disclosure;

[0042] FIG. 13 is a schematic diagram of another display panel in a non-display state according to an embodiment of the present disclosure;

[0043] FIG. 14 is a schematic diagram of another display panel in a display state according to an embodiment of the present disclosure;

[0044] FIG. 15 is a schematic diagram of another display panel in a display state according to an embodiment of the present disclosure;

[0045] FIG. 16 is a schematic diagram of another display panel in a non-display state according to an embodiment of the present disclosure;

[0046] FIG. 17 is a schematic diagram of another display panel in a non-display state according to an embodiment of the present disclosure;

[0047] FIG. 18 is a schematic diagram of another display panel in a display state according to an embodiment of the present disclosure;

[0048] FIG. 19 is a schematic diagram of the isolation barrier, the first sub-electrode and the third sub-electrode shown in FIGS. 17-18;

[0049] FIG. 20 is a schematic diagram of several light rays in a display panel;

[0050] FIG. 21 is a schematic diagram of another display panel in a display state according to an embodiment of the present disclosure;

[0051] FIG. 22 is a schematic diagram of another display panel according to an embodiment of the present disclosure;

[0052] FIG. 23 is a schematic diagram of a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. The embodiments described below are part of, rather than all of, the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort fall within the scope of protection of the present disclosure.

[0054] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "include" or "contain" and the like mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and the like do not mean only physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships can also change accordingly.

[0055] The structure and principle of the ink reflective display device (Clear-Ink Display, CID) are as follows: the device comprises an array substrate, a counter substrate, and a barrier wall supported between the array substrate and the counter substrate, the barrier wall is a closed structure, each pixel corresponds to a closed barrier wall, a closed barrier wall and a cavity formed by the array substrate and the counter substrate are filled with ink material, the ink material comprises ink solvent and black particles. Electrodes are respectively arranged on the counter substrate and the array substrate, a driving circuit for driving display is arranged on the array substrate, for example, the driving circuit comprises a transistor, a scan line, etc.

[0056] In the display state, i.e. the bright state, the electrodes of the pixel are electrified to drive the black particles to the side of the cavity close to the array substrate, at this time the ink solvent is in contact with the dielectric layer on the counter substrate. The refractive index of the dielectric layer is greater than the refractive index of the ink solvent, when the natural light on the display side is incident on the interface between the dielectric layer and the ink solvent, total reflection occurs, the reflected light passes through the counter substrate, and the bright state is presented. In the non-display state, i.e. the dark state, the electrodes of the pixel are electrified in the opposite direction to drive the black particles away from the array substrate and move towards the counter substrate, at this time the black particles are laid on the inner side of the counter substrate. When the natural light is incident on the interface between the dielectric layer and the black particles, the light is absorbed by the black particles, no light is emitted from the display side, and the dark state is presented.

[0057] FIG. 1 is a schematic diagram of a display panel in which the isolation barrier wall is distorted. Referring to FIG. 1, if the thickness of the display device or the display panel is large, i.e. the cell thickness of the display unit surrounded by the barrier wall and the array substrate and the counter substrate is large, it is required that the height of the barrier wall is high. In this case, if the width of the barrier wall is small, the barrier wall structure is unstable and is easy to be distorted, and residual barrier wall material exists at the position where the barrier wall should not exist near the bottom of the isolation barrier wall, affecting the display quality. If the width of the barrier wall is too large, the barrier wall will block too much light-emitting area, thereby reducing the aperture ratio.

[0058] At least one embodiment of the present disclosure provides a display panel, which comprises a first substrate and a second substrate opposite to each other in the thickness direction of the display panel, and an isolation barrier wall. The first substrate is located on the display side, and the second substrate is located on the non-display side; the isolation barrier wall is arranged between the first substrate and the second substrate to define a cavity of a display unit, and the cavity is filled with a liquid material for display; the isolation barrier wall comprises a first barrier wall and a second barrier wall arranged in the thickness direction of the display panel and connected to each other, the first barrier wall is close to the display side, and the second barrier wall is close to the non-display side; the area of the cross section of the first barrier wall is smaller than the area of the cross section of the second barrier wall, and the cross section is perpendicular to the thickness direction of the display panel.

[0059] According to the display panel provided in the embodiments of the present disclosure, in the display unit, the cross-sectional area of the first barrier wall is smaller than the cross-sectional area of the second barrier wall, and the first barrier wall is closer to the display side, so that in the display state (bright state), the first barrier wall has smaller shielding on the light-emitting area close to the display side, so that the display unit has a larger light-emitting area, thereby improving the aperture ratio of the display panel.

[0060] The display device provided in at least one of the embodiments of the present disclosure comprises any of the display panels provided in the embodiments of the present disclosure.

[0061] FIG. 2 is a structural schematic diagram of a display panel provided in an embodiment of the present disclosure; FIG. 3 is a schematic diagram of the display panel shown in FIG. 2 in a display state; and FIG. 4 is a schematic diagram of the display panel shown in FIG. 2 in a non-display state. FIG. 2 is a schematic diagram in the case where no voltage is applied to the electrodes of the display panel for controlling the movement of display particles.

[0062] Referring to FIG. 2, the display panel 10 comprises a first substrate 1 and a second substrate 2 opposite to each other in the thickness direction D1 of the display panel, and a barrier wall 3. The first substrate 1 is located on the display side, and the second substrate 2 is located on the non-display side. The barrier wall 3 is arranged between the first substrate 1 and the second substrate 2, and defines a cavity of a display unit, and the cavity is filled with a liquid material L for display. The barrier wall 3 comprises a first barrier wall 31 and a second barrier wall 32 arranged in the thickness direction D1 of the display panel and connected to each other, the first barrier wall 31 is close to the display side, and the second barrier wall 32 is close to the non-display side. The cross-sectional area of the first barrier wall 31 is smaller than the cross-sectional area of the second barrier wall 32, and the cross section is perpendicular to the thickness direction D1 of the display panel.

[0063] According to the display panel 10 provided in the embodiments of the present disclosure, in the display unit, the cross-sectional area of the first barrier wall 31 is smaller than the cross-sectional area of the second barrier wall 32, and the first barrier wall 32 is closer to the display side, so that a larger display panel thickness can be achieved by the superposition of the heights of the first barrier wall 31 and the second barrier wall 32, that is, a larger cell thickness can be achieved, and in the display state (bright state), the first barrier wall 31 has smaller shielding on the light-emitting area close to the display side, so that the display unit has a larger light-emitting area, thereby improving the aperture ratio of the display panel 10.

[0064] For example, the display panel provided in the embodiments of the present disclosure is a reflective display panel, and uses ambient light for display. In the display state, the ambient light is reflected by the following light-reflecting particles and reflective layer to achieve bright state display; in the non-display state, the ambient light is absorbed and shielded by the following light-blocking particles to achieve dark state.

[0065] Figure 5 is a partial schematic view of an isolation barrier wall of a display panel according to an embodiment of the present disclosure. For example, the width a of the first barrier wall 31 in the lateral direction pw1 is less than the width a of the second barrier wall 32 in the lateral direction pw2 . The lateral direction is perpendicular to the thickness direction D1 of the display panel.

[0066] There is a certain correlation between the size of the surface where the first barrier wall 31 and the second barrier wall 32 meet. For example, the first barrier wall 31 can be formed on the first substrate 1, the second barrier wall 32 can be formed on the second substrate 2, and then liquid material (commonly referred to as ink) can be dropped on the first substrate 1, the sealant 6 can be applied on the second substrate 2, the first substrate 1 and the second substrate 2 can be pressed and joined together using an alignment device, and the liquid material can be sealed in the cavity of the display unit. Then, the sealant can be cured, for example, using ultraviolet curing or thermal curing methods. The difference between the width a of the second barrier wall 32 pw2 and the width a of the first barrier wall 31 pw1 is greater than or equal to the alignment accuracy of the device during alignment of the first substrate 1 and the second substrate 2. For example, the alignment accuracy is ±3 microns, and the difference between the width a of the second barrier wall 32 pw2 and the width a of the first barrier wall 31 pw1 is greater than or equal to 3 microns.

[0067] For example, the width a of the first barrier wall 31 pw1 can be 3 microns to 6 microns, taking into account the current manufacturing process that can be achieved.

[0068] In combination with Figures 1 and 5, for example, the height h of the first barrier wall 31 in the thickness direction D1 of the display panel pw1 is less than the height h of the second barrier wall 32 in the thickness direction D1 of the display panel pw2 . In this way, while the first barrier wall 31 with a smaller cross-sectional area is used to improve the aperture ratio, the second barrier wall 32 with a larger cross-sectional area has a larger height, and the first barrier wall 31 with a smaller cross-sectional area has a smaller height. This design helps to improve the stability of the isolation barrier wall 3 and prevent distortion, so that a higher and more stable cell thickness can be achieved using the superposition of the first barrier wall 31 and the second barrier wall 32, thereby improving display quality.

[0069] In the above method of manufacturing the display panel 10, the liquid material is dropped on the first substrate 1 where the first barrier wall 31 is located, which is easier to spread than dropping on the second substrate 2 where the second barrier wall 32 is located.

[0070] For example, the display panel 10 includes a plurality of display units, each display unit corresponding to one isolation barrier wall 3. For example, one isolation barrier wall 3 is a closed annular structure, and one isolation barrier wall 3 together with the first substrate 1 and the second substrate 2 encloses a cavity of one display unit.

[0071] For example, referring to FIG. 2, the display unit further includes a first electrode 4 disposed on the first substrate 1 and a second electrode 5 disposed on the second substrate 2. The second electrode 5 includes a first sub-electrode 51, a second sub-electrode 52 and a third sub-electrode 53 arranged in sequence and spaced apart from each other. The display panel 10 includes a plurality of display units, the plurality of display units including a first display unit P1, a second display unit P2 and a third display unit P3 arranged adjacently and in sequence; the isolation barrier wall 3 includes a first part 3a isolating the first display unit P1 and the second display unit P2 and a second part 3b isolating the first display unit P1 and the second display unit P2, and the first part 3a and the second part 3b each have a first barrier wall 31 and a second barrier wall 32. The first sub-electrode 51 is close to the first part 3a, the third sub-electrode 53 is close to the second part 3b, and the second sub-electrode 52 is between the first sub-electrode 51 and the third sub-electrode 53.

[0072] For example, the first electrode 4 can be a common electrode for the plurality of display units. For example, the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53 are strip electrodes respectively. The arrangement direction of the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53 is D2, and each strip electrode extends in a direction perpendicular to the arrangement direction D2.

[0073] For example, the liquid material L includes a light-transmitting liquid LS (for example, a solvent material) and display particles in the light-transmitting liquid LS. For example, in the embodiment shown in FIG. 2, the display particles are charged light-blocking particles EP1. Referring to FIG. 3, opposite voltages are applied to the first electrode 4 and the second electrode 5 to form a first electric field (a longitudinal electric field), and under the action of the first electric field, the light-blocking particles EP1 are laid and stacked on the side of the cavity close to the first substrate 1 to block light, thereby realizing a non-display state, i.e., a dark state, without light emitting from the display side of the display unit. Referring to FIG. 4, different voltages are applied to the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53 to form a second electric field (a transverse electric field), and under the action of the second electric field, the light-blocking particles EP1 move to the side of the cavity close to the second substrate 2 and adhere to the vicinity of the first sub-electrode 51 and the third sub-electrode 53, so that light transmits from the display side, thereby realizing a display state, i.e., a bright state. In the display state, the height of the light-blocking particles EP1 in the display panel thickness direction D1 is lower than the height of the first barrier wall 31 in the display panel thickness direction D1, so as to realize a higher aperture ratio.

[0074] For example, the light shielding particles EP1 are negatively charged. For example, in the non-display state, a positive voltage can be applied to the first electrode 4 and a negative voltage can be applied to the second electrode 5 to form a first electric field, for example, a negative voltage can be applied to the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53. In the display state, a positive voltage can be applied to the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53, and the voltage of the second sub-electrode 52 is less than the voltage of the first sub-electrode 51 and the voltage of the third sub-electrode 53, so that the negatively charged light shielding particles EP1 move to the side of the cavity close to the second substrate 2 and are patterned attached near the first sub-electrode 51 and the third sub-electrode 53, for example, patterned attached directly above the first sub-electrode 51 and the third sub-electrode 53.

[0075] For example, the light shielding particles EP1 are black particles. The black particles have good light absorption performance and can achieve ideal dark state effect in the non-display state. Of course, the light shielding particles EP1 are not limited to black particles, but can also be light absorbing particles of other colors.

[0076] For example, the first electrode 4 is a transparent electrode. For example, the first electrode 4 is a transparent metal oxide material, such as indium tin oxide (ITO), indium zinc oxide (IZO), etc. Of course, the material of the first electrode is not limited to the above-mentioned types.

[0077] For example, as shown in FIG. 2, the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53 are located away from the first substrate 1 on the side of the isolation barrier 3. For example, the first sub-electrode 51 overlaps the first portion 3a in the display panel thickness direction D1. Alternatively, in other embodiments, the first sub-electrode 51 can also not overlap the first portion 3a in the display panel thickness direction D1. Similarly, the third sub-electrode 53 overlaps the second portion 3b in the display panel thickness direction D1. Alternatively, in other embodiments, the third sub-electrode 53 does not overlap the second portion 3b in the display panel thickness direction D1. This can achieve greater design possibilities for the spacing between adjacent sub-electrodes and the width of each sub-electrode in the arrangement direction D2.

[0078] The inventors have found through experiments that designing appropriate spacing between adjacent sub-electrodes and spacing between adjacent sub-electrodes is beneficial to reducing the blind area of controlling particle movement and achieving better display effect. The "blind area" refers to an area where the charged display particles cannot be effectively controlled by the electric field to move directionally.

[0079] For example, the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53 have equal width in the arrangement direction D2, and are equidistantly distributed from each other; the ratio of the width to the distance ranges from 13 / 20 to 20 / 10. It is verified by experiments that, in the range, the blind area is small, the light-shielding particles can be pulled apart in the display state, the light-shielding particle patterning effect is good, the particle residue is not obvious, and the aperture ratio is considered, the appropriate brightness is achieved, and the display effect is good.

[0080] For example, each of the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53 has a width greater than 6 microns and less than 13 microns in the arrangement direction D2. FIG. 6 is a diagram of the light-shielding particle aggregation effect in the display state of a display panel provided by the embodiment of the present disclosure under different sub-electrode widths. FIG. 6(a) is a test result under the condition that the width of each sub-electrode in the arrangement direction D2 is equal to 6 microns, and FIG. 6(b) is a test result under the condition that the width of each sub-electrode in the arrangement direction D2 is equal to 13 microns. The gray-black area is the area where the light-shielding particles are aggregated in the display state. In FIG. 6(a), the patterning effect of the light-shielding particles is not ideal, the sub-electrode width is too small, the electric field cannot pull the particles apart completely, and the particle residue is obvious. In FIG. 6(b), the electric field strength is sufficient to pull the particles apart to both sides to achieve the bright state, but the light-shielding particle accumulation width is also wide at this time, the aperture ratio is only 58%, and the white state reflectivity is less than 30%. Therefore, the sub-electrode width is too small, the electric field cannot pull the particles apart completely, and the sub-electrode width is too large, the aperture ratio is too low. The inventors have verified by experiments that, in the range of greater than 6 microns and less than 13 microns of the sub-electrode width, the above two factors can be considered, and the ideal bright state effect and aperture ratio can be obtained.

[0081] The liquid material L includes display particles, which are laid and stacked on the side of the cavity close to the first substrate 1 under the action of the electric field in the display state or the non-display state.

[0082] Referring to FIG. 5, the height of the first barrier wall 31 in the thickness direction D1 of the display panel is greater than the saturated stacking thickness h of the display particles 粒子 The saturated stacking thickness of the display particles refers to the thickness of the display particles laid and stacked on the side of the cavity close to the first substrate 1 to achieve the highest light output in the display state, or the thickness of the display particles laid and stacked on the side of the cavity close to the first substrate 1 to achieve the lowest light transmittance in the non-display state.

[0083] For example, in the display panel shown in FIGS. 2-4 and the working process of the above display state and non-display state, that is, in the case where the display particles include light-shielding particles EP1, the particle size of the light-shielding particles EP1 is 300 nm to 500 nm, and the number of layers of the light-shielding particles EP1 that achieve the saturated stacking thickness of the display particles is 2. For example, the particle size of the commonly used light-shielding particles EP1 is 350 nm.

[0084] Figure 7 shows the reflectivity curves for display panels with different cell thicknesses and varying numbers of light-shielding particle stacks in the non-display state. Referring to Figure 7, curves 1, 2, and 3 represent tests conducted at cell thicknesses of 25 μm, 50 μm, and 75 μm, respectively, for a light-shielding particle EP1 with a particle size of 350 nm. This indicates that once the number of light-shielding particle stacks reaches two, the reflectivity essentially remains unchanged with further increases in the number of stacks. Therefore, the number of light-shielding particle EP1 layers required to achieve saturated stacking thickness for display particles is two. The inventors also conducted similar experiments for other particle sizes in the 300 nm–500 nm range, and the number of light-shielding particle EP1 layers required to achieve saturated stacking thickness for display particles was also two.

[0085] For example, similarly, experiments have shown that when the display particles include reflective particles EP2, the particle size of the reflective particles EP2 is 300 nm to 500 nm, and the number of reflective particle EP2 layers required to achieve saturated stacking thickness of the display particles is 5 layers. For example, the commonly used reflective particles EP2 and EP1 have a particle size of 400 nm.

[0086] Figure 8 is a rendering of a display panel provided in an embodiment of this disclosure under the condition that the aspect ratio of the isolation barrier is greater than the limit value. For example, in the display panel 10 provided in at least one embodiment of this disclosure, the limit value of the aspect ratio of the isolation barrier 3 is 27:6, that is, the aspect ratio is less than or equal to 27:6. Referring to Figure 8, referring to Figure 8(a), when the aspect ratio of the isolation barrier 3 is greater than the limit value of 27:6, the isolation barrier 3 is distorted. Referring to Figure 8(b), when the aspect ratio of the isolation barrier 3 is greater than the limit value of 27:6, there is a residue problem at the bottom of the isolation barrier 3. There is residual A isolation barrier material at the location where the isolation barrier should not exist near the bottom of the isolation barrier, which affects the manufacturing accuracy and the actual effect. The aspect ratio of the isolation barrier refers to: the highest height (h) of the isolation barrier that can be manufactured during the manufacturing process of the isolation barrier. pw1 with h pw2 The ratio of the sum of the two maximum heights to the minimum width of the first retaining wall that can be achieved at this time. For example, when the maximum height of the retaining wall is 27 micrometers, the minimum width is 6 micrometers. If the minimum width is less than 6 micrometers, problems such as the retaining wall twisting, leaving residue, or even the retaining wall falling off will occur.

[0087] For example, referring to FIG. 2, the display panel 10 further comprises a black matrix EM, which is located on the first substrate 1 and is located on the side of the isolation barrier 3 away from the second substrate 2, and the orthographic projection of the first barrier 31 on the surface of the first substrate 1 is located within the orthographic projection of the black matrix EM on the surface of the first substrate 1. Thus, in the non-display state (dark state), the first barrier 31 is shielded by the black matrix EM, and the high reflectivity in the dark state due to the scattering of ambient light by the first barrier 31 can be avoided.

[0088] For example, referring to FIG. 5, the width a of the black matrix EM in the arrangement direction D2 is greater than the width a of the first barrier 31 in the arrangement direction D2. BM PW1 So that the black matrix EM shields the first barrier 31.

[0089] For example, referring to FIG. 2, the display panel further comprises a reflective layer 7 located on the side of the second electrode 5 close to the second substrate 2. Thus, in the embodiments shown in FIGS. 2-4, in the display state, the light output rate can be increased by the reflection of the bottom reflective layer.

[0090] In the embodiments shown in FIG. 14 below, the bright state is achieved by the combined action of the reflection (first reflection) of the bottom reflective layer 7 and the reflection of the light-reflecting particles EP2 (second scattering) laid on the top, and the light output rate in the bright state is increased.

[0091] For example, referring to FIG. 2, the display panel further comprises a color filter layer CF, for example, the color filter layer CF is in the same layer as the black matrix EM, one display unit comprises one sub-pixel, and the black matrix EM also functions to define a plurality of color filter units corresponding to a plurality of display units, i.e., the plurality of color filter units correspond to the plurality of sub-pixels, respectively. The plurality of color filter units have different filter colors, and the light in the sub-pixels is emitted after passing through the color filter units, so as to realize color display. For example, the plurality of color filter units comprise red color filter units, green color filter units and blue color filter units; of course, other color filter units can also be included, such as white color filter units, orange color filter units, magenta color filter units, etc. Specifically, a person skilled in the art can design the color filter according to the conventional technology of designing a color filter corresponding to each sub-pixel.

[0092] For example, the first electrode 4 can be prepared by a sputtering process, and the thickness of the first electrode 4 is, for example, 600 angstroms to 800 angstroms, for example, 700 angstroms, which functions together with the second electrode 5 or the third electrode 8 described below to realize a longitudinal electric field.

[0093] ​For example, the display panel 10 further comprises a first insulating isolation layer PVX1 and a second insulating isolation layer PVX2. The first insulating isolation layer PVX1 and the second insulating isolation layer PVX2 can be prepared by a deposition process. For example, the material of the first insulating isolation layer PVX1 and the second insulating isolation layer PVX2 can be an inorganic insulating material, such as SiO, SiN, etc., and the thickness of the first insulating isolation layer PVX1 and the second insulating isolation layer PVX2 can be 2000 angstroms, respectively. The thickness and the material of the first insulating isolation layer PVX1 and the second insulating isolation layer PVX2 are only exemplary and are not limited to the above-mentioned material types and thickness ranges. Those skilled in the art can design according to the needs.

[0094] For example, the black matrix EM can be prepared by an exposure process. For example, the thickness of the black matrix EM is 1-2 microns. Of course, the thickness of the black matrix EM is only exemplary and is not limited to the above-mentioned degree range. Those skilled in the art can design according to the needs.

[0095] The first barrier wall 31 and the second barrier wall 32 can be prepared by a conventional gluing-exposure-development process, respectively. For example, the first barrier wall and the second barrier wall 32 are both transparent materials, such as resin-based transparent materials, to avoid affecting the aperture ratio of the display panel 10.

[0096] For example, the reflective layer 7 can be prepared by a sputtering process. For example, the material of the reflective layer 7 can be a material with high reflectivity, such as Ag, Mo, etc. For example, the thickness of the reflective layer 7 is 1000-2000 angstroms. Of course, the thickness and the material of the reflective layer are only exemplary and are not limited to the above-mentioned material types and thickness ranges. Those skilled in the art can design according to the needs.

[0097] FIG. 9 is a cross-sectional schematic view of a first barrier wall of a display panel according to an embodiment of the present disclosure. For example, as shown in FIG. 9, the first barrier wall 31 can have a shape with a wider middle portion and narrower top and bottom portions. For example, the top portion of the first barrier wall 31 can have a circular arc shape. Of course, the cross section of the first barrier wall 31 along the thickness direction D1 of the display panel can also be rectangular, right trapezoidal, etc. The top and bottom portions of the first barrier wall 31 can both be flat to achieve more stable support.

[0098] For example, referring to FIG. 2, the first end of the first barrier wall 31 is arranged on the first substrate 1, the first end of the second barrier wall 32 is arranged on the second substrate 2, the second end of the first barrier wall 31 is connected to the second end of the second barrier wall 32, and the lower surface of the second end of the first barrier wall 31 is attached to the upper surface of the second end of the second barrier wall 32.

[0099] For example, one of the lower surface of the second end of the first barrier wall 31 and the upper surface of the second end of the second barrier wall 32 is a flat plane, and the other is a flat plane or a smooth curved surface. The flat plane refers to not having a groove or recess intentionally arranged, and the groove or recess here refers to a groove or recess formed by a patterning process, for example, rather than a groove or recess caused by surface roughness naturally formed due to material or process.

[0100] For example, in the embodiment shown in FIG. 2, the lower surface of the second end of the first barrier wall 31 and the upper surface of the second end of the second barrier wall 32 are both flat planes to form sufficient contact area between them, so that the structure is stable, thereby avoiding the problem that the contact area between the first barrier wall 31 and the second barrier wall 32 is insufficient, resulting in a decrease in support force or the first barrier wall 31 and the second barrier wall 32 being misaligned after the cell is assembled, which cannot maintain a stable cell thickness.

[0101] For example, in the embodiment shown in FIG. 2, the cross section of the first barrier wall 31 along the display panel thickness direction D1 is rectangular, and the cross section of the second barrier wall 32 along the display panel thickness direction D1 is rectangular.

[0102] FIGS. 10-12 are schematic diagrams of the cross-sectional shapes of several different isolation barrier walls provided in embodiments of the present disclosure.

[0103] For example, in the embodiment shown in FIG. 10, the cross section of the first barrier wall 31 along the display panel thickness direction D1 is rectangular, and the cross section of the second barrier wall 32 along the display panel thickness direction D1 is a right trapezoid, which is conducive to the isolation barrier wall providing stable support.

[0104] For example, in the embodiment of FIG. 11, the lower surface of the second end of the first barrier wall 31 is a flat plane, and the upper surface of the second end of the second barrier wall 32 is a smooth curved surface. The cross section of the first barrier wall 31 along the display panel thickness direction D1 is rectangular, and the cross section of the second barrier wall 32 along the display panel thickness direction D1 is elliptical. The curvature of the upper surface of the second end of the second barrier wall 32 is as small as possible to ensure that the top of the second barrier wall 32 has sufficient contact area with the bottom of the first barrier wall 31, thereby improving the stability of the structure.

[0105] For example, in the embodiment of FIG. 12, the lower surface of the second end of the first barrier wall 31 is a smooth curved surface, and the upper surface of the second end of the second barrier wall 32 is a flat plane. The cross section of the first barrier wall 31 along the display panel thickness direction D1 is elliptical, and the cross section of the second barrier wall 32 along the display panel thickness direction D1 is a right trapezoid. The curvature of the lower surface of the second end of the first barrier wall 31 is as small as possible to ensure that the bottom of the first barrier wall 31 has sufficient contact area with the top of the second barrier wall 32, thereby improving the stability of the structure.

[0106] Figure 13 is a schematic view of another display panel in a display state according to an embodiment of the present disclosure; and Figure 14 is a schematic view of another display panel in a non-display state according to an embodiment of the present disclosure. Referring to Figure 13, the liquid material L includes a light-transmissive liquid LS and display particles in the light-transmissive liquid LS, the display particles including charged light-blocking particles EP1 and charged light-reflecting particles EP2, the charged light-blocking particles EP1 and the charged light-reflecting particles EP2 having opposite charge properties; opposite voltages are applied to the first electrode 4 and the second electrode 5 to form a first electric field (a longitudinal electric field), under the action of the first electric field, the charged light-blocking particles EP1 are stacked on the side of the cavity close to the first substrate 1 to block light, and the charged light-reflecting particles EP2 are stacked on the side of the cavity close to the second substrate 2, thereby realizing the non-display state. Referring to Figure 14, the properties of the voltages applied to the first electrode 4 and the second electrode 5 in the non-display state are reversed, and different voltages are applied to the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53 to form a third electric field (including a longitudinal electric field and a transverse electric field), under the action of the third electric field, the charged light-blocking particles EP1 move to the side of the cavity close to the second substrate 2 and adhere to the vicinity of the first sub-electrode 51 and the third sub-electrode 53 to allow light to pass through from the display side, and the charged light-reflecting particles EP2 are stacked on the side of the cavity close to the first substrate 1 to reflect light from the display side to the display side of the display panel 10, thereby realizing the display state; in the display state, the height of the charged light-blocking particles EP1 in the display panel thickness direction D1 is lower than the height of the first barrier wall 31 in the display panel thickness direction D1.

[0107] Alternatively, referring to Figure 13, the display panel 10 further includes a third electrode 8, which is also a common electrode. Opposite voltages are applied to the first electrode 4 and the third electrode 8 to form a non-display state, and the properties of the voltages applied to the first electrode 4 and the third electrode 8 in the non-display state are reversed, and different voltages are applied to the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53 to form a third electric field (including a longitudinal electric field and a transverse electric field) to realize a display state.

[0108] For example, the light blocking particles EP1 are negatively charged and the light reflecting particles EP2 are positively charged. In the non-display state, a positive voltage is applied to the first electrode 4 and a negative voltage is applied to the second electrode 5 (or the third electrode 8) to form a first longitudinal electric field, so that the light reflecting particles EP2 move to the non-display side and the light blocking particles move to the display side. In the display state, a negative voltage is applied to the first electrode 4 and a positive voltage is applied to the second electrode 5 (or the third electrode 8) to form a second longitudinal electric field, so that the light reflecting particles EP2 move to the display side (on the side of the cavity close to the first substrate 1) and the light blocking particles move to the non-display side (on the side of the cavity close to the second substrate 2); at the same time, a positive voltage is applied to the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53, and the voltage of the second sub-electrode 52 is smaller than the voltage of the first sub-electrode 51 and the voltage of the third sub-electrode 53, so that the negatively charged light blocking particles EP1 are patterned to attach near the first sub-electrode 51 and the third sub-electrode 53 on the side of the cavity close to the second substrate 2, for example, directly above the first sub-electrode 51 and the third sub-electrode 53.

[0109] The other features of the display panel shown in FIGS. 13-14 and the corresponding technical effects are the same as those of the embodiment shown in FIGS. 2-4, and reference can be made to the previous description, which will not be repeated here.

[0110] FIG. 15 is a schematic view of another display panel in a display state according to an embodiment of the present disclosure; and FIG. 16 is a schematic view of another display panel in a non-display state according to an embodiment of the present disclosure.

[0111] FIG. 15 is a schematic view of another display panel in a display state according to an embodiment of the present disclosure; and FIG. 16 is a schematic view of another display panel in a non-display state according to an embodiment of the present disclosure.

[0112] FIG. 17 is a schematic view of another display panel in a non-display state according to an embodiment of the present disclosure; FIG. 18 is a schematic view of another display panel in a display state according to an embodiment of the present disclosure; and FIG. 19 is a schematic view of the isolation barrier wall, the first sub-electrode and the third sub-electrode shown in FIGS. 17-18.

[0113] Referring to FIGS. 17-19, this embodiment is different from the embodiment shown in FIG. 2 in that, in one display unit, the second sub-electrode 52 is located on the side of the isolation barrier wall 3 away from the first substrate 1, the first sub-electrode 51 is located on the side wall of the second barrier wall 32 of the first portion 3a, the side wall faces the second portion 3b of the isolation barrier wall 3, the second sub-electrode 52 is located on the side wall of the second barrier wall 32 of the second portion 3b, the side wall faces the first portion 3a of the isolation barrier wall 3, the width of the first sub-electrode 51 and the width of the third sub-electrode 53 are both less than the width of the second sub-electrode 52. Thus, the width of the first sub-electrode 51 and the third sub-electrode 53 is reduced, thereby reducing the area covered by the light shielding particles attached near the first sub-electrode 51 and the third sub-electrode 53 in the display state, improving the aperture ratio in the display state, and exposing a larger area of the bottom reflective layer, which is conducive to improving the light reflectivity and thereby further improving the light extraction efficiency.

[0114] The width of the first sub-electrode 51, the width of the second sub-electrode 52 and the width of the third sub-electrode 53 all refer to the width in the arrangement direction D2.

[0115] For example, referring to FIG. 17, for the first portion 3a of the isolation barrier wall 3, the first portion 3a is taken as an example, of course, the same is true for the second portion 3b. The third sub-electrode 53 of the first display unit P1 covers the first side wall of the second barrier wall 32 of the first portion 3a, the first sub-electrode 51 of the second display unit P2 covers the second side wall of the second barrier wall 32 of the first portion 3a, and the third sub-electrode 53 of the first display unit P1 and the first sub-electrode 51 of the second display unit P2 are insulated from each other, and the first side wall and the second side wall are opposite to each other in the arrangement direction of the first sub-electrode 51, the second sub-electrode 52 and the third sub-electrode 53.

[0116] For example, referring to FIG. 17, the display substrate further comprises a first insulating layer 01, the first insulating layer 01 covers the third sub-electrode 53 of the first display unit P1, the first sub-electrode 51 of the second display unit P2 and the upper surface of the second barrier wall 32 of the first portion 3a away from the second substrate 2, so as to ensure that the third sub-electrode 53 of the first display unit P1 and the first sub-electrode 51 of the second display unit P2 are insulated.

[0117] For example, referring to FIG. 17, the third sub-electrode 53 of the first display unit P1 and the first sub-electrode 51 of the second display unit P2 further cover the upper surface of the second barrier wall 32 of the first portion 3a away from the second substrate 2.

[0118] For example, referring to FIG. 17, the display substrate further comprises a second insulating layer 02 covering the second sub-electrode 52, a first via hole H1 and a second via hole H2 penetrating the second insulating layer 02, a first connecting electrode in the first via hole H1, a second connecting electrode in the second via hole H2, and a driving circuit layer on the side of the second sub-electrode 52 away from the second substrate 2, the first sub-electrode 51 and the third sub-electrode 53 are respectively electrically connected with the driving circuit through the first connecting electrode and the second connecting electrode.

[0119] For example, referring to FIG. 17, the display panel 10 further comprises a first pin LP1 and a second pin LP2, the first pin LP1 is located on the side of the first sub-electrode 51 close to the first substrate 1 and is electrically connected with the first sub-electrode 51, the second pin LP2 is located on the side of the third sub-electrode 53 close to the second substrate 2 and is electrically connected with the third sub-electrode 53, the first pin LP1 is electrically connected with the first connecting electrode, and the second pin LP2 is electrically connected with the second connecting electrode.

[0120] FIG. 20 is a schematic diagram of several light rays in a display panel. Referring to FIG. 20(a), in the display state, i.e., the bright state, when ambient light is incident on the pixel area, i.e., into the cavity filled with liquid material of the display unit. For small-angle incident light, light ray 1 will enter the human eye after reflection, light ray 2 is absorbed by the light shielding particle, light ray 3 enters the adjacent pixel, and light ray 4 may not be emitted. Referring to FIG. 20(b), for large-angle incident light, part of it is incident on the light shielding particle and is absorbed by the light shielding particle, part of it is incident on the scattering layer 05, and most of the light rays are scattered into the adjacent pixel.

[0121] FIG. 21 is a schematic diagram of another display panel in the display state according to an embodiment of the present disclosure. For example, referring to FIG. 21, the display panel 10 further comprises a reflection structure 9 located on the side of the isolation barrier wall 3 close to the second substrate 2, and the projection of the reflection structure 9 on the surface of the second substrate 2 overlaps with the projection of the isolation barrier wall 3 on the surface of the second substrate 2; the reflection structure 9 is configured to reflect the light incident on the reflection structure 9 from the display unit back to the display unit, so as to prevent light crosstalk between adjacent display units and further increase the light reflectance and light emission rate in the display state.

[0122] For example, referring to FIG. 21, the reflection structure 9 is internally filled with scattering particles, and the scattering particles are configured to scatter the incident light, so as to expand the emission angle range of the light emitted from the reflection structure 9 and returned to the current display unit, make the light rays more uniform, and improve the display effect.

[0123] For example, the material of the scattering particles is TiO2. Of course, other materials with good light scattering performance can also be used.

[0124] For example, the cross section of the reflection structure 9 along the display panel thickness direction D1 is a right trapezoid. Referring to FIG. 21, in the case where the cross section of the reflection structure 9 along the display panel thickness direction D1 is a right trapezoid, the light incident into the current display unit is reflected to the side surface of the reflection structure 9 or the light directly incident to the side surface of the reflection structure 9 is reflected via the side surface of the reflection structure 9, and then can return to the current display unit and further exit from the light exit side of the current display unit, thereby ensuring the reliability of preventing light crosstalk between adjacent display units and further improving the light extraction rate of the current display unit.

[0125] The side surface of the reflection structure 9 can be provided with an auxiliary reflection layer, for example, the auxiliary reflection layer is a mirror surface reflection material such as an Ag film.

[0126] For example, referring to FIG. 21, the display panel 10 further includes a third insulating layer 03, a scattering layer 04, and a reflection layer 05. The reflection structure 9 is located in the third insulating layer 03; the scattering layer 04 is located on the side of the reflection structure 9 close to the second substrate 2 and is configured to scatter incident light; and the reflection layer 05 is located on the side of the scattering layer 04 close to the second substrate 2 and is configured to reflect incident light, so as to further increase the light reflectivity and light extraction rate of the display state.

[0127] For example, the material of the scattering layer 04 can also be TiO2. The material of the reflection layer 05 can be the same as the previous reflection layer material 7.

[0128] FIG. 22 is a schematic diagram of another display panel according to an embodiment of the present disclosure. Referring to FIG. 22, the display panel 10 is different from the embodiment shown in FIG. 2 in that the display panel 10 further includes a first high refractive index layer 06 and a second high refractive index layer 07 located on the first substrate (not shown in FIG. 22, and can refer to the position of the first substrate 1 in FIG. 2). The first high refractive index layer 06 is located on the side of the second high refractive index layer 07 away from the second substrate 2, and the refractive index of the second high refractive index layer 07 is greater than the refractive index of the first high refractive index layer 06. Thus, the incident light is irradiated to the reflection layer 05 after multiple steps of refraction at multiple interfaces, and then is refracted at multiple interfaces, and can exit from the display side at a large angle, thereby achieving the effect of improving the reflectivity and increasing the viewing angle.

[0129] FIG. 23 is a schematic diagram of a display device according to an embodiment of the present disclosure. Referring to FIG. 23, the display device 100 according to at least one of the embodiments of the present disclosure includes any one of the display panels 10 according to the embodiments of the present disclosure. The display device is a reflective display device, and can be any product or component having a display function, such as a tablet computer, an ink display screen, and the like. Of course, the specific type of the display device according to the embodiments of the present disclosure is not limited.

[0130] Accordingly, the display device according to the embodiments of the present disclosure has the technical effects of the display panel according to the embodiments of the present disclosure.

[0131] The above-described exemplary embodiments of the present disclosure are merely given as examples, and are not intended to limit the protection scope of the present disclosure, which is defined by the scope of the claims.

Claims

1. A display panel, comprising: a first substrate and a second substrate opposite to each other in a thickness direction of the display panel, wherein the first substrate is located at a display side and the second substrate is located at a non-display side; a barrier wall arranged between the first substrate and the second substrate, defining a cavity of a display cell, and filled with a liquid material for display, wherein the barrier wall comprises a first barrier wall and a second barrier wall arranged in the thickness direction of the display panel and connected to each other, the first barrier wall is close to the display side, and the second barrier wall is close to the non-display side; an area of a cross section of the first barrier wall is smaller than an area of a cross section of the second barrier wall, the cross sections being perpendicular to the thickness direction of the display panel.

2. The display panel of claim 1, wherein, a height of the first barrier wall in the thickness direction of the display panel is smaller than a height of the second barrier wall in the thickness direction of the display panel.

3. The display panel of claim 1 or 2, wherein, the display cell further comprises a first electrode arranged on the first substrate and a second electrode arranged on the second substrate; the second electrode comprises a first sub-electrode, a second sub-electrode and a third sub-electrode arranged at intervals from each other; the display panel comprises a plurality of the display cells, the plurality of the display cells comprising a first display cell, a second display cell and a third display cell arranged adjacently and sequentially; the barrier wall comprises a first part separating the first display cell and the second display cell and a second part separating the first display cell and the second display cell, and the first part and the second part each have the first barrier wall and the second barrier wall; the first sub-electrode is close to the first part, the third sub-electrode is close to the second part, and the second sub-electrode is between the first sub-electrode and the third sub-electrode.

4. The display panel of any of claims 1-3, wherein, the liquid material comprises a light-transmitting liquid and the display particles in the light-transmitting liquid, the display particles being charged light-blocking particles; opposite voltages are applied to the first electrode and the second electrode to form a first electric field, under the action of the first electric field, the light-blocking particles are laid and stacked on a side of the cavity close to the first substrate to block light, thereby realizing the non-display state; different voltages are applied to the first sub-electrode, the second sub-electrode and the third sub-electrode to form a second electric field, under the action of the second electric field, the light-blocking particles move to a side of the cavity close to the second substrate and adhere to the vicinity of the first sub-electrode and the third sub-electrode, so that light transmits from the display side, thereby realizing the display state; in the display state, a height of the light-blocking particles in the thickness direction of the display panel is lower than the height of the first barrier wall in the thickness direction of the display panel.

5. The display panel of any of claims 1-3, wherein, the liquid material comprises a light-transmitting liquid and the display particles in the light-transmitting liquid, the display particles comprising charged light-blocking particles and charged light-reflecting particles, and the light-blocking particles and the light-reflecting particles have opposite properties of electric charges. applying opposite voltages to the first electrode and the second electrode to form a first electric field, under the action of the first electric field, the light-blocking particles are laid and stacked on the side of the cavity close to the first substrate to block light, and the light-reflecting particles are laid and stacked on the side of the cavity close to the second substrate, thereby realizing the non-display state; reversing the property of the voltage applied to the first electrode and the second electrode in the non-display state, and applying different voltages to the first sub-electrode, the second sub-electrode and the third sub-electrode to form a third electric field, under the action of the third electric field, the light-blocking particles move to the side of the cavity close to the second substrate and adhere to the vicinity of the first sub-electrode and the third sub-electrode to make light penetrate from the display side, and the light-reflecting particles are laid and stacked on the side of the cavity close to the first substrate to reflect light from the display side to emit from the display side of the display panel, thereby realizing the display state; in the display state, the height of the light-blocking particles in the thickness direction of the display panel is lower than the height of the first barrier in the thickness direction of the display panel.

6. The display panel of any of claims 1-3, wherein, The display unit further comprises a first electrode arranged on the first substrate and a second electrode arranged on the second substrate. The liquid material comprises a light-blocking liquid and the display particles in the light-blocking liquid, and the display particles are light-reflecting particles; applying opposite voltages to the first electrode and the second electrode to form a first electric field, under the action of the first electric field, the light-reflecting particles are laid and stacked on the side of the cavity close to the first substrate to reflect light from the display side to emit from the display side of the display panel, thereby realizing the display state; reversing the property of the voltage applied to the first electrode and the second electrode in the non-display state to form a fourth electric field, under the action of the fourth electric field, the light-reflecting particles are laid and stacked on the side of the cavity close to the second substrate and adhere to the vicinity of the first sub-electrode and the third sub-electrode to make light penetrate from the display side, thereby realizing the display state.

7. The display panel of any of claims 4-6, wherein, The liquid material comprises display particles, under the action of an electric field in the display state or the non-display state, the display particles are laid and stacked on the side of the cavity close to the first substrate; The height of the first barrier in the thickness direction of the display panel is greater than the saturated stacking thickness of the display particles, which refers to the thickness of the display particles laid and stacked on the side of the cavity close to the first substrate in the display state to achieve the highest light emission rate, or the thickness of the display particles laid and stacked on the side of the cavity close to the first substrate in the non-display state to achieve the lowest light transmittance.

8. The display panel of claim 7, wherein, In the case that the display particles comprise light-blocking particles, the particle size of the light-blocking particles is 300nm-500nm, and the number of layers of the light-blocking particles achieving the saturated stacking thickness of the display particles is 2 layers.

9. The display panel of claim 7, wherein, In the case that the display particle comprises a reflective particle, the particle size of the reflective particle is 300-500 nm, and the number of layers of the reflective particle achieving the saturated stacking thickness of the display particle is 5.

10. The display panel of any of claims 3-9, wherein, The first sub-electrode, the second sub-electrode and the third sub-electrode are located on the side of the isolation barrier wall away from the first substrate; The first sub-electrode overlaps or does not overlap with the first part in the thickness direction of the display panel; The third sub-electrode overlaps or does not overlap with the second part in the thickness direction of the display panel.

11. The display panel of claim 10, wherein, The widths of the first sub-electrode, the second sub-electrode and the third sub-electrode in the arrangement direction thereof are equal, and are equally spaced from each other; The ratio of the width to the spacing ranges from 13 / 20 to 20 / 10.

12. The display panel of any of claims 3-9, wherein, In one of the display units, The second sub-electrode is located on the side of the isolation barrier wall away from the first substrate, The first sub-electrode is located on the sidewall of the second barrier wall of the first part, which faces the second part of the isolation barrier wall, The second sub-electrode is located on the sidewall of the second barrier wall of the second part, which faces the first part of the isolation barrier wall; The width of the first sub-electrode and the width of the third sub-electrode are both smaller than the width of the second sub-electrode.

13. The display panel of claim 12, wherein, For the first part of the isolation barrier wall, the third sub-electrode of the first display unit covers the first sidewall of the second barrier wall of the first part, the first sub-electrode of the second display unit covers the second sidewall of the second barrier wall of the first part, and the third sub-electrode of the first display unit and the first sub-electrode of the second display unit are spaced from each other to be insulated, the first sidewall and the second sidewall are opposite to each other in the arrangement direction of the first sub-electrode, the second sub-electrode and the third sub-electrode; The display substrate further comprises a first insulating layer covering the third sub-electrode of the first display unit, the first sub-electrode of the second display unit and the upper surface of the second barrier wall of the first part away from the second substrate.

14. The display panel of claim 13, wherein, The third sub-electrode of the first display unit and the first sub-electrode of the second display unit also cover part of the upper surface of the second barrier wall of the first part away from the second substrate.

15. The display panel of any of claims 12-14, wherein, The display substrate further comprises a second insulating layer covering the second sub-electrode, a first via hole and a second via hole penetrating the second insulating layer, a first connecting electrode located in the first via hole, a second connecting electrode located in the second via hole, and a driving circuit layer located on the side of the second sub-electrode away from the second substrate, the first sub-electrode and the third sub-electrode are electrically connected to the driving circuit through the first connecting electrode and the second connecting electrode, respectively.

16. The display panel of claim 15, wherein, The display panel further comprises a first pin and a second pin, the first pin is located on a side of the first sub-electrode close to the first substrate and is electrically connected with the first sub-electrode, the second pin is located on a side of the third sub-electrode close to the second substrate and is electrically connected with the third sub-electrode, the first pin is electrically connected with the first connecting electrode, and the second pin is electrically connected with the second connecting electrode.

17. The display panel of any of claims 1-16, wherein, A first end of the first barrier wall is arranged on the first substrate, and a first end of the second barrier wall is arranged on the second substrate. A lower surface of the second end of the first barrier wall is attached to an upper surface of the second end of the second barrier wall, one of the lower surface of the second end of the first barrier wall and the upper surface of the second end of the second barrier wall is a flat plane, and the other is a flat plane or a smooth curved surface.

18. The display panel of claim 17, wherein, In a case where the lower surface of the second end of the first barrier wall and the upper surface of the second end of the second barrier wall are both flat planes, A cross section of the first barrier wall along a thickness direction of the display panel is a rectangle, and a cross section of the second barrier wall along the thickness direction of the display panel is a rectangle; or A cross section of the first barrier wall along a thickness direction of the display panel is a rectangle, and a cross section of the second barrier wall along the thickness direction of the display panel is a right trapezoid.

19. The display panel of any of claims 1-18, wherein, The display panel further comprises a black matrix, the black matrix is located on the first substrate and is located on a side of the isolation barrier wall away from the second substrate, and a normal projection of the first barrier wall on a surface of the first substrate is located in a normal projection of the black matrix on the surface of the first substrate.

20. The display panel of any of claims 1-19, wherein, The display panel further comprises a reflection structure, the reflection structure is located on a side of the isolation barrier wall close to the second substrate, and a normal projection of the reflection structure on a surface of the second substrate overlaps with a normal projection of the isolation barrier wall on the surface of the second substrate. The reflection structure is configured to reflect light incident on the reflection structure back to the display unit.

21. The display panel of claim 20, wherein, The reflection structure is internally filled with scattering particles, and the scattering particles are configured to scatter incident light.

22. The display panel of claim 21, wherein, The material of the scattering particles is TiO2.

23. The display panel of any of claims 20-22, wherein, A cross section of the reflection structure along a thickness direction of the display panel is a right trapezoid.

24. The display panel of any of claims 20-23, wherein, The display panel further comprises a third insulating layer, a scattering layer, and a reflection layer. The reflection structure is located in the third insulating layer. The scattering layer is located on a side of the reflection structure close to the second substrate and is configured to scatter incident light. The reflection layer is located on a side of the scattering layer close to the second substrate and is configured to reflect incident light.

25. A display device comprising the display panel according to any one of claims 1-24.

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