Display module and display device

Abstract

This disclosure provides a display module and display device, comprising: a first substrate, a second substrate, and a cavity between the two, wherein an electrophoretic liquid is filled in the cavity; a first electrode is located on the side of the first substrate facing the electrophoretic liquid, and a second electrode is located on the side of the second substrate facing the electrophoretic liquid; a transparent pillar covers a portion of the second electrode and exposes a portion of the second electrode; along the thickness direction of the display module, the first electrode overlaps with the second electrode exposed by the transparent pillar. By configuring the second electrode to partially overlap with and be partially exposed by the transparent pillar, the electric field strength between the first electrode and the second electrode exposed by the transparent pillar is increased, and light-shielding particles only accumulate in the area with high electric field strength at the edge of the transparent pillar, thereby improving the light transmittance of the display module in a non-privacy state.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] With the continuous development of display technology, the methods for implementing privacy protection functions in display devices have gradually diversified. Among them, the privacy protection electrophoresis box structure with electrophoretic particles is a relatively common method. The privacy protection electrophoresis box typically includes an upper electrode and a lower electrode arranged opposite each other, as well as electrophoretic particles (usually carrying charges) located between the upper and lower electrodes. By adjusting the electric field between the upper and lower electrodes, the distribution of electrophoretic particles can be controlled, thereby achieving the switching between privacy protection and non-privacy protection states.

[0003] In the current display device, when not in privacy mode, electrophoretic particles still block a large area of ​​the effective light-emitting area of ​​the display device, resulting in a pattern that seriously affects the transmittance.

[0004] Therefore, how to improve the light transmittance of display devices in non-privacy mode and enhance visual effects has become one of the technical problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned technical problems, this disclosure provides a display module and display device for improving the light transmittance of the display device in a non-peeping state, thereby enhancing visual effects.

[0006] This disclosure provides a display module, including: a first substrate and a second substrate, the first substrate and the second substrate being disposed opposite each other to form a cavity; an electrophoretic liquid filling the cavity, the electrophoretic liquid including light-shielding particles; a first electrode disposed on the side of the first substrate facing the electrophoretic liquid; a second electrode disposed on the side of the second substrate facing the electrophoretic liquid; and a transparent pillar array disposed on the second substrate and located on the side of the second electrode facing away from the second substrate, the transparent pillar array including a plurality of transparent pillars, the transparent pillars covering a portion of the second electrode and exposing a portion of the second electrode; along the thickness direction of the display module, the first electrode overlaps with the second electrode exposed by the transparent pillars.

[0007] Based on the same inventive concept, this disclosure provides a display device, including the display module as described above.

[0008] The technical solution provided in this disclosure has the following advantages compared with the prior art: A display module and display device provided in this disclosure include: a first substrate and a second substrate, the first substrate and the second substrate being disposed opposite each other to form a cavity; an electrophoretic liquid filling the cavity, the electrophoretic liquid including light-shielding particles; a first electrode disposed on the side of the first substrate facing the electrophoretic liquid; a second electrode disposed on the side of the second substrate facing the electrophoretic liquid; and a transparent pillar array disposed on the second substrate and located on the side of the second electrode facing away from the second substrate, the transparent pillar array including multiple transparent pillars, the transparent pillars covering a portion of the second electrode and exposing a portion of the second electrode; along the thickness direction of the display module, the first electrode overlaps with the second electrode exposed by the transparent pillars. Under an applied electric field, a strong electric field region is generated between the first electrode and the second electrode exposed by the transparent pillars, and a weak electric field region is formed between the first electrode and the second electrode shielded by the transparent pillars. Under the influence of dielectric force, the light-blocking particles concentrate in the region of strong electric field. That is, the light-blocking particles only gather near the second electrode, which is exposed by the transparent pillar and overlaps with the first electrode. In addition to the light channel where the transparent pillar is located being fully exposed, at least a portion of the area between adjacent transparent pillars is also exposed, which is beneficial to improving the light transmittance of the display module in the non-privacy state. Compared with related technologies, where the second electrode is disposed on the entire surface of the second substrate or located in the area outside the transparent pillar in the second substrate, this disclosure, by setting the second electrode to partially overlap with and be partially exposed by the transparent pillar, increases the electric field strength between the first electrode and the second electrode exposed by the transparent pillar. The light-blocking particles only gather in the area with high electric field strength at the edge of the transparent pillar, which can improve the light transmittance of the display module in the non-privacy state and improve the visual effect. Attached Figure Description

[0009] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0010] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a partial structural diagram of a display panel in related technologies; Figure 2 for Figure 1 A plan view of the central display panel in non-peeping mode; Figure 3 The figure shown is a plan view of a display module in a privacy mode according to an embodiment of this disclosure; Figure 4 As shown Figure 3 A schematic diagram of the cross-section along A-A'; Figure 5 As shown Figure 3 The image shows a plan view of the display module in its non-peeping mode. Figure 6 As shown Figure 3 The image shows another planar schematic of the display module in its non-peeping mode; Figure 7 The figure shown is a partial cross-sectional schematic diagram of a display module provided in an embodiment of this disclosure; Figure 8 As shown Figure 7 A schematic diagram of a display module; Figure 9 As shown Figure 7 Another planar schematic diagram of the display module; Figure 10 As shown Figure 7 Another planar schematic diagram of the display module; Figure 11 The diagram shown is a schematic representation of the arrangement relationship between a transparent pillar and a pixel group according to an embodiment of this disclosure. Figure 12 The figure shown is a partial cross-sectional schematic diagram of another display module provided in an embodiment of this disclosure; Figure 13 The figure shown is a partial cross-sectional schematic diagram of another display module provided in an embodiment of this disclosure; Figure 14 The figure shown is a plan view of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0013] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0014] Figure 1 This is a partial structural diagram of a display panel in related technologies. Figure 2 for Figure 1 Please refer to the schematic diagram of the display panel in non-peeping mode. Figure 1 and Figure 2The display panel 100' includes a first substrate 10' and a second substrate 20' disposed opposite to the first substrate 10'. A first electrode 11' is included on the surface of the first substrate 10' facing the second substrate 20', and a second electrode 21' is included on the surface of the second substrate 20' facing the first substrate 10'. A receiving cavity is provided between the first substrate 10' and the second substrate 20', and the receiving cavity includes pillars 30' and an electrophoretic liquid dispersed between adjacent pillars 30'. The electrophoretic liquid includes electrophoretic particles 00'. In the privacy mode, the control electric field between the two electrodes is adjusted by adjusting the voltage received by the first electrode 11' and the second electrode 21', thereby controlling the dispersion of the electrophoretic particles 00' within the receiving cavity. The dispersed electrophoretic particles 00' can limit the angular range corresponding to the emitted light, achieving a privacy effect. In the non-peeping state, by adjusting the voltage received by the first electrode 11' and the second electrode 21' to adjust the control electric field between the two electrodes, the electrophoretic particles 00' are controlled to be concentrated and distributed in the cavity. For example, they can be concentrated and distributed in a small area in the cavity, and the display panel 100' returns to a normal viewing angle.

[0015] Please combine Figure 2 Since the electrodes in related technologies are usually designed for the entire surface, in the non-peeping state, the electrophoretic particles 00' are adsorbed on the second electrode 21' which is set for the entire surface. In the direction parallel to the plane where the second substrate 20' is located, the electrophoretic particles 00' will still occupy the area outside all the pillars 30', which seriously affects the transmittance of the display panel 100'.

[0016] To address the aforementioned issues, this disclosure provides a display module and display device that, while providing privacy protection, also improves the transmittance of the display module in a non-privacy state.

[0017] Figure 3 The figure shown is a plan view of a display module in a privacy mode according to an embodiment of this disclosure. Figure 4 As shown Figure 3 A schematic diagram of the cross-section along A-A'. Figure 5 As shown Figure 3 The diagram shows the module in its non-peeping mode. Please refer to the image below. Figures 3 to 5This disclosure provides a display module 100, including: a first substrate 10 and a second substrate 20, the first substrate 10 and the second substrate 20 being disposed opposite each other to form a chamber 01; an electrophoretic liquid filling the chamber 01, the electrophoretic liquid including light-shielding particles 00; a first electrode 11 disposed on the side of the first substrate 10 facing the electrophoretic liquid; a second electrode 21 disposed on the side of the second substrate 20 facing the electrophoretic liquid; and a transparent pillar array 30 disposed on the second substrate 20 and located on the side of the second electrode 21 away from the second substrate 20, the transparent pillar array 30 including a plurality of transparent pillars 31, the transparent pillars 31 covering a portion of the second electrode 21 and exposing a portion of the second electrode 21; along the thickness direction of the display module 100, the first electrode 11 overlaps with the second electrode 21 exposed by the transparent pillars 31.

[0018] Specifically, the display module 100 includes a first substrate 10 and a second substrate 20 disposed opposite to each other. The display module 100 also includes a plurality of light-emitting elements. Optionally, the light-emitting elements can be disposed on the second substrate 20 or on a separate display panel. The display panel can be located on the side of the second substrate 20 opposite to the first substrate 10; this disclosure does not limit this. The light-emitting elements include red light-emitting elements, blue light-emitting elements, green light-emitting elements, etc. This disclosure does not limit the color type of the light-emitting elements; the specific type can be set according to actual needs. Optionally, the light-emitting elements can be organic light-emitting diodes (OLEDs). The display module 100 also includes an array layer (not shown in the figure). The array layer may contain a pixel driving circuit, which is connected to the light-emitting elements and is used to provide the driving current required for light emission to the light-emitting elements.

[0019] The first substrate 10 and the second substrate 20 are located on one side of the light-emitting surface of the light-emitting element, and a cavity 01 is formed between the first substrate 10 and the second substrate 20. The cavity 01 is filled with an electrophoretic solution including light-shielding particles 00. A first electrode 11 is disposed on the side of the first substrate 10 facing the second substrate 20, and a second electrode 21 is disposed on the side of the second substrate 20 facing the first substrate 10. It should be noted that the display module 100 also includes a circuit board (not shown in the figure) connected to the first electrode 11 and the second electrode 21. The circuit board can provide voltage to the first electrode 11 and the second electrode 21 respectively. By adjusting the voltage received by the first electrode 11 and the second electrode 21, the control electric field between the first electrode 11 and the second electrode 21 can be adjusted to control the dispersion or concentration of the light-shielding particles 00 in the cavity 01. When the light-shielding particles 00 are dispersed in the cavity 01, the dispersed light-shielding particles 00 can limit the large-angle emitted light of the display module 100 to achieve privacy protection; when the light-shielding particles 00 are concentrated in the cavity 01, the display module 100 can restore a normal viewing angle.

[0020] The display module 100 provided in this disclosure further includes a transparent pillar array 30 located between the first substrate 10 and the second substrate 20. The transparent pillar array 30 includes a plurality of transparent pillars 31, each of which covers a portion of the second electrode 21 and exposes a portion of the second electrode 21. Along a direction perpendicular to the plane of the first substrate 10, the first electrode 11 overlaps with the second electrode 21 exposed by the transparent pillars 31. Under the applied electric field, a strong electric field region is generated between the first electrode 11 and the second electrode 21 exposed by the transparent pillars 30, while a weak electric field region is formed between the second electrode 21 whose first electrode 11 is shielded by the transparent pillars 31. The light-shielding particles 00 concentrate towards the strong electric field region under the action of dielectric force. That is, the light-shielding particles 00 only gather near the second electrode 21 exposed by the transparent pillars 31 and overlapping with the first electrode 11. In addition to the light channel where the transparent pillars 31 are located being completely exposed, at least a portion of the area between adjacent transparent pillars 31 is also exposed, which is beneficial to improving the light transmittance of the display module 100 in the non-privacy state. Compared to related technologies, where the second electrode 21 is disposed on the entire surface of the second substrate 20 or located in the entire area outside the transparent pillar 31 in the second substrate 20, this disclosure, by setting the second electrode 21 to partially overlap with and partially expose the transparent pillar 31, increases the electric field strength between the first electrode 11 and the second electrode 21 exposed by the transparent pillar 31. The light-shielding particles 00 only gather in the area with high electric field strength at the edge of the transparent pillar 31, which can improve the light transmittance of the display module 100 in the non-peeping state.

[0021] Thus, by configuring the second electrode 21 to be at least partially covered by the transparent pillar 31 and at least partially exposed by the transparent pillar 31, the electric field strength between the first electrode 11 and the second electrode 21 exposed by the transparent pillar 31 can be increased. Under the action of dielectric force, the light-shielding particles 00 only gather in the area with high electric field strength at the edge of the transparent pillar 31, which can reduce the large-area shading of the second substrate 20 by the light-shielding particles 00 and effectively improve the light transmittance of the display module 100 in the non-peeping state.

[0022] Figure 6 As shown Figure 3 The image shows another planar schematic of the display module in its non-peeping mode. Please refer to the diagram below. Figures 3 to 6 In the display module 100 provided in this disclosure, the second electrode 21 is a strip electrode and the first electrode 11 is a planar electrode.

[0023] Specifically, the first electrode 11 is located on the side of the first substrate 10 facing the electrophoretic liquid, and the first electrode 11 is a planar electrode. The second electrode 21 is located on the side of the second substrate 20 facing the electrophoretic liquid, and the second electrode 21 is a strip electrode. Please refer to sections 3 to 4. Figure 5 In one optional embodiment provided in this disclosure, the strip-shaped second electrode 21 extends longitudinally along the transparent pillar array 30. Please refer to... Figure 6 In another optional embodiment provided in this disclosure, the strip-shaped second electrode 21 extends obliquely along the transparent column array 30. Optionally, the strip-shaped second electrode 21 may also extend laterally along the transparent column array 30, etc. This disclosure does not limit the extension direction of the second electrode 21, and it can be set according to actual needs.

[0024] Designing the second electrode 21 as a strip reduces its projected area on the second substrate 20. In the non-peeping state, the light-blocking particles 00 can only accumulate on the strip-shaped second electrode 21 exposed by the transparent pillar 31, reducing the obstruction of emitted light. Compared to a full-surface design, the strip-shaped second electrode 21 also reduces the amount of electrode material used, lowering production costs.

[0025] Thus, by setting the first electrode 11 as a surface and the second electrode 21 as a strip, the light-shielding particles 00 can only accumulate on the part of the second electrode 21 exposed by the transparent column 31 in the non-peeping state, which can improve the light transmittance of the display module 100 while reducing production costs.

[0026] Figure 7 The image shown is a partial cross-sectional schematic diagram of a display module provided in an embodiment of this disclosure. Figure 8 As shown Figure 7 A planar schematic diagram of a display module. Figure 9 As shown Figure 7 Another planar schematic diagram of the display module. Figure 10 As shown Figure 7 Another planar schematic diagram of the display module is shown below. Figures 7 to 10 In the display module 100 provided in this disclosure, both the first electrode 11 and the second electrode 21 are strip electrodes.

[0027] Specifically, the first electrode 11 is located on the side of the first substrate 10 facing the electrophoretic liquid, and the first electrode 11 is a strip electrode. The second electrode 21 is located on the side of the second substrate 20 facing the electrophoretic liquid, and the second electrode 21 is a strip electrode. Compared with the previous embodiment where the first electrode 11 is a planar electrode and the second electrode 21 is a strip electrode, this embodiment, by also setting the first electrode 11 as a strip electrode, can further reduce the use of electrode materials and lower production costs while improving the light transmittance of the display module 100 in the non-peeping state.

[0028] Thus, by setting both the first electrode 11 and the second electrode 21 as strip electrodes, the light transmittance of the display module 100 in the non-peeping state can be improved while further reducing production costs.

[0029] Please refer to Figure 7 and Figure 8In one optional embodiment provided in this disclosure, both the first electrode 11 and the second electrode 21 are strip electrodes, and the first electrode 11 and the second electrode 21 are arranged in the same direction. Please refer to... Figure 8 For example, the first electrode 11 and the second electrode 21 both extend longitudinally along the transparent pillar array 30 and are arranged laterally along the transparent pillar array 30. Optionally, the first electrode 11 and the second electrode 21 may also extend laterally along the transparent pillar array 30 and be arranged longitudinally along the transparent pillar array 30; or, the first electrode 11 and the second electrode 21 may also extend obliquely to the left along the transparent pillar array 30 and be arranged obliquely to the right along the transparent pillar array 30; or, the first electrode 11 and the second electrode 21 may also extend obliquely to the right along the transparent pillar array 30 and be arranged obliquely to the left along the transparent pillar array 30... This disclosure does not limit this, and the specific arrangement can be determined according to actual needs.

[0030] The first electrode 11 and the second electrode 21 extend in the same direction and are arranged in the same direction. When an electric field is applied, a strong electric field region is generated between the first electrode 11 and the second electrode 21 exposed by the transparent pillar 31, and a weak electric field region is generated between the first electrode 11 and the second electrode 21 overlapping with the transparent pillar 31. The light-shielding particles 00 concentrate in the strong electric field region under the action of dielectric force. The light-shielding particles 00 only gather near the second electrode 21 exposed by the transparent pillar 31 and covered by the first electrode 11, so that at least part of the transparent pillar 31 and the area between adjacent transparent pillars 31 are not blocked by the light-shielding particles 00, which can increase the effective light channel of the display module 100 in the non-peeping state and improve the light transmittance.

[0031] Thus, when both the first electrode 11 and the second electrode 21 are strip electrodes, by setting the extension direction and arrangement direction of the first electrode 11 and the second electrode 21 to be the same, the light-shielding particles 00 can be made to gather only in areas with high electric field strength while reducing the electrode material, thereby increasing the effective light channel of the display module 100 in the non-peeping state and improving the light transmittance.

[0032] Please refer to Figure 9 and Figure 10 In one optional embodiment provided in this disclosure, the first electrode 11 and the second electrode 21 are both strip electrodes, and the arrangement directions of the first electrode 11 and the second electrode 21 intersect.

[0033] Please refer to Figure 9 The first electrode 11 extends laterally along the transparent pillar array 30 and is arranged longitudinally along the transparent pillar array 30. The second electrode 21 extends longitudinally along the transparent pillar array 30 and is arranged laterally along the transparent pillar array 30. Figure 9The illustration only uses the perpendicular arrangement of the first electrode 11 and the second electrode 21 as an example and does not represent the actual arrangement direction of the first electrode 11 and the second electrode 21. Optionally, the first electrode 11 can extend longitudinally along the transparent column array 30 and the second electrode 21 can extend laterally along the transparent column array 30; or, the first electrode 11 can extend laterally along the transparent column array 30 and the second electrode 21 can extend obliquely along the transparent column array 30, or vice versa.

[0034] Please refer to Figure 10 The first electrode 11 extends obliquely to the right along the transparent pillar array 30 and is arranged obliquely to the left along the transparent pillar array 30. The second electrode 21 extends obliquely to the left along the transparent pillar array 30 and is arranged obliquely to the right along the transparent pillar array 30. Figure 10 The illustration only uses the perpendicular arrangement of the first electrode 11 and the second electrode 21 as an example and does not represent the actual arrangement direction of the first electrode 11 and the second electrode 21. Optionally, the first electrode 11 may extend obliquely to the left along the transparent pillar array 30, the second electrode 21 may extend obliquely to the right along the transparent pillar array 30, and so on. This disclosure does not limit this, as long as the first electrode 11 and the second electrode 21 exposed outside the transparent pillar 31 at least partially overlap.

[0035] When both the first electrode 11 and the second electrode 21 are strip-shaped electrodes, their arrangement directions intersect. This allows at least a portion of the second electrode 21 exposed outside the transparent pillar 31 to overlap with the first electrode 11 in the thickness direction of the display module 100. When a voltage is applied to the first electrode 11 and the second electrode 21, a strong electric field region is formed between the overlapping electrodes, attracting light-shielding particles 00 to gather in the strong electric field region, thereby creating more light channels and improving the light transmittance of the display module 100 in the non-peeping state. Furthermore, compared to when the first electrode 11 and the second electrode 21 are arranged in the same direction, their overlapping area is larger; in this embodiment, the overlapping area when the arrangement directions of the first electrode 11 and the second electrode 21 intersect is smaller, which can reduce the gathering area of ​​light-shielding particles 00, increase the effective light channels, and further improve the light transmittance of the display module 100 in the non-peeping state.

[0036] Thus, when both the first electrode 11 and the second electrode 21 are strip electrodes, by setting the arrangement direction of the first electrode 11 and the second electrode 21 to intersect, the overlapping area of ​​the first electrode 11 and the second electrode 21 can be reduced, attracting light-blocking particles 00 to gather only in the overlapping area of ​​the first electrode 11 and the second electrode 21, avoiding more effective light channels, and further improving the light transmittance of the display module 100 in the non-peeping state.

[0037] Figure 11The diagram shown illustrates the arrangement relationship between a transparent pillar and a pixel group according to an embodiment of this disclosure. Please refer to it. Figure 11 In a display module 100 provided in this disclosure, the display module 100 includes a plurality of first regions 40, each first region 40 includes n×n pixel groups P0, and the first region 40 includes an integer number of transparent pillars 31 arranged in an array, wherein n is an integer greater than or equal to 3.

[0038] Specifically, the display module 100 includes an array of pixel groups P0, each pixel group P0 including sub-pixels P1 of different colors, and each sub-pixel P1 including a light-emitting element and a pixel driving circuit connected to the light-emitting element. Please refer to... Figure 11 Taking the first region 40, which includes 4×4 pixel groups P0, as an example, an integer number of transparent pillars 31 are provided on these 4×4 pixel groups P0. The transparent pillars 31 can serve as light channels for the pixel groups P0, enabling effective light emission from the pixel groups P0 in both privacy and privacy modes. This is merely an example; the first region 40 may also include 3×3 pixel groups P0, or 5×5 pixel groups P0, etc. This disclosure does not limit the number of pixel groups P0 included in the first region 40. By dividing the display module 100 into multiple first regions 40 and setting an integer number of transparent pillars 31 arranged in an array within each first region 40, the setting ratio of pixel groups P0 and transparent pillars 31 can be scaled up and standardized, which helps simplify the production process and improve production efficiency.

[0039] Thus, by setting an integer number of transparent pillars 31 arranged in an array in each first region 40, the transparent pillars 31 can be used as effective light channels for pixel group P0, enabling the display module 100 to emit light effectively in both privacy and non-privacy states. By dividing the display module 100 into multiple first regions 40, the setting relationship between pixel group P0 and transparent pillars 31 in one first region 40 can be extended to the entire display module 100, which is beneficial for the mass production of transparent pillars 31, simplifies the production process, and improves production efficiency.

[0040] Please continue to refer to this. Figures 3 to 11 In a display module 100 provided in this disclosure, the cross-sectional area of ​​the transparent pillar 31 is not equal to the area of ​​the pixel group P0 along the direction parallel to the plane where the display module 100 is located.

[0041] Specifically, when the cross-sectional area of ​​the transparent pillar 31 is equal to the area of ​​the pixel group P0, the projection of the transparent pillar 31 in the direction parallel to the plane of the display module 100 matches the size of the pixel group P0. The transparent pillar 31 may form a periodic pattern similar to that of the pixel group P0. The spatial frequency of this periodic pattern may be close to the spatial frequency of the pixel group P0, causing interference between the two and thus producing moiré patterns. This disclosure sets the cross-sectional area of ​​the transparent pillar 31 to be unequal to the area of ​​the pixel group P0, so that the periodic pattern of the transparent pillar 31 and the pixel group P0 no longer matches, making it impossible to form stable interference conditions, thereby reducing the generation of moiré patterns.

[0042] Thus, by setting the cross-sectional area of ​​the transparent pillar 31 to be different from the area of ​​the pixel group P0 along the direction parallel to the plane where the display module 100 is located, the periodic interference caused by the two having the same area can be broken, the generation of moiré patterns can be reduced, and the visual effect can be improved.

[0043] Please refer to Figures 3 to 11 In a display module 100 provided in this disclosure, the cross-section of the transparent column 31 is an equilateral polygon, and the number of sides of the equilateral polygon is greater than or equal to 4.

[0044] Specifically, the accompanying drawings of this disclosure only illustrate the case where the cross-section of the transparent column 31 is an equilateral quadrilateral. Optionally, the cross-section of the transparent column 31 can also be an equilateral pentagon, an equilateral hexagon, etc. This disclosure does not limit this, and the specific design can be made according to actual needs.

[0045] Please combine Figures 3 to 10 Along the thickness direction of the display module 100, the first electrode 11 overlaps with the second electrode 21 exposed outside the transparent pillar 31. When the transparent pillars 31, with an equilateral quadrilateral cross-section, are arranged in an array, the strong electric field region formed by the overlap of the first electrode 11 and the second electrode 21 attracts the light-shielding particles 00 to gather. The lattice formed by the gathered light-shielding particles 00 is staggered relative to the transparent pillars 31, which is beneficial for uniform visual effect. The same effect is achieved when the cross-sectional area of ​​the transparent pillars 31 is an equilateral polygon with other side lengths.

[0046] Thus, by setting the cross-section of the transparent pillar 31 as an equilateral polygon with a side length greater than or equal to 4, the lattice formed by the aggregation of the light-blocking particles 00 can be arranged in an alternating manner relative to the transparent pillar 31, which is beneficial for a uniform visual effect.

[0047] Please continue to refer to this. Figures 3 to 11In a display module 100 provided in this disclosure, the transparent pillar 31 includes multiple apex corners, and the included angle between two adjacent sides of an equilateral polygon is the apex corner; in the thickness direction of the display module 100, the second electrode 21 overlaps with two opposite apex corners of the transparent pillar 31.

[0048] Specifically, please combine Figure 5 , Figure 8 , Figure 9 In this embodiment, the transparent pillar 31 has an equilateral quadrilateral cross-sectional area in the direction parallel to the plane of the display module 100. The included angle formed by two adjacent sides of the equilateral quadrilateral is the vertex angle. That is, the transparent pillar 31 with an equilateral quadrilateral cross-sectional area has four vertex angles. Along the thickness direction of the display module 100, the transparent pillar 31 covers at least a portion of the second electrode 21 and exposes at least a portion of the second electrode 21. The second electrode 21 overlaps with two opposite vertex angles of the transparent pillar 31. It should be noted that this disclosure is only illustrated by the example of the transparent pillar 31 having four vertex angles. It can be understood that when the number of vertex angles of the transparent pillar 31 exceeds 6, 8, etc., the technical solution provided in this embodiment is also applicable.

[0049] Please combine Figure 5 When the first electrode 11 is a planar electrode and the second electrode 21 is a strip electrode, since the second electrode 21 overlaps with the two opposite apex corners of the transparent pillar 31, and the first electrode 11 overlaps with the second electrode 21 exposed by the transparent pillar 31 in the thickness direction of the display module 100, in the non-peeping state, the light-blocking particles 00 gather at the apex corner position where the second electrode 21 overlaps with the transparent pillar 31. That is, the light-blocking particles 00 gather at the edge of the apex corner of the transparent pillar 31, and the other areas of the second substrate 20 except for the edge of the apex corner of the transparent pillar 31 are unobstructed, which is beneficial to improving the light transmittance of the display module 100 in the non-peeping state.

[0050] Please combine Figure 8 and Figure 9 When the two apex corners of the second electrode 21 and the transparent pillar 31 overlap, even if both the first electrode 11 and the second electrode 21 are strip electrodes, regardless of whether the arrangement directions of the first electrode 11 and the second electrode 21 are the same, in the non-peeping state, the light-blocking particles 00 gather at the apex corner position where the second electrode 21 and the transparent pillar 31 overlap, which is beneficial to increase the effective light channel and improve the light transmittance of the display module 100 in the non-peeping state.

[0051] Thus, by setting the two opposite apex corners of the second electrode 21 and the transparent pillar 31 to overlap in the thickness direction of the display module 100, the light-shielding particles 00 can only gather at the apex corner position where the second electrode 21 and the transparent pillar 31 overlap in the non-peeping state, which can increase the effective light channel of the display module 100 and improve the light transmittance in the non-peeping state.

[0052] Please refer to Figure 3 , Figure 5 , Figure 6 , Figures 8 to 11 In a display module 100 provided in this disclosure, the transparent pillar array 30 includes a plurality of transparent pillar rows 32 and a plurality of transparent pillar columns 33, wherein the transparent pillars 31 in adjacent transparent pillar rows 32 are arranged alternately, and the transparent pillars 31 in adjacent transparent pillar columns 33 are arranged alternately.

[0053] Specifically, at least some of the transparent pillars 31 in the transparent pillar array 30 are arranged along the row direction, and at least some of the transparent pillars 31 are arranged along the column direction. The transparent pillars 31 in adjacent rows 32 and adjacent columns 33 are arranged alternately, meaning at least some of the transparent pillars 31 are arranged diagonally to the left and at least some diagonally to the right. Compared to traditional rectangular grid-like pillar arrays, which tend to form spatial frequencies similar to pixel groups P0, leading to moiré interference, this disclosure, by setting the transparent pillars 31 in an alternate arrangement, with the positions of the transparent pillars 31 in adjacent rows 32 and adjacent columns 33 offset, makes the spatial frequency distribution of the transparent pillar array 30 more complex, preventing the formation of stable interference patterns, disrupting interference conditions, and reducing the formation of moiré patterns.

[0054] In addition, the specially arranged transparent pillars 31 overlap with the second electrode 21, and the first electrode 11 overlaps with the second electrode 21 exposed by the transparent pillars 31 to form a grid-like strong electric field area, so that the dot matrix formed by the aggregation of light-shielding particles 00 is staggered with the pixel group P0, resulting in a more uniform visual effect.

[0055] The staggered transparent pillars 31 form a honeycomb-like support structure, which can also provide stable support and help to disperse the stress on the display module 100 when it is bent or impacted.

[0056] Thus, by setting the transparent pillar array 30 in an alternating arrangement, the strong electric field region formed between the first electrode 11 and the second electrode 21 exposed by the transparent pillar 31 can attract the light-shielding particles 00 to gather. The dot matrix formed by the gathering of light-shielding particles 00 can be arranged in an alternating manner relative to the pixel group P0, which is beneficial to uniform visual effect.

[0057] Figure 12The diagram shown is a partial cross-sectional view of another display module provided in an embodiment of this disclosure. Figure 13 The diagram shown is a partial cross-sectional view of another display module provided in this embodiment of the present disclosure. Specifically, Figure 12 A separate display panel 50 is set inside the display module 100, while Figure 13 The second substrate 20 is reused as the light-emitting substrate 51. It should be noted that... Figure 12 and Figure 13 This diagram only illustrates the relative positions of the substrates; the thickness of each substrate and film layer does not represent the actual thickness in the product. Please refer to [the documentation / reference]. Figure 12 In a display module 100 provided in this disclosure, the display module 100 includes a display panel 50, a first substrate 10 and a second substrate 20 located on one side of the light emission direction of the display panel 50, and the second substrate 20 located on the side of the first substrate 10 facing the display panel 50; the first electrode 11 is reused as a touch electrode. In an optional embodiment provided in this disclosure, the display panel is an independent panel other than the first substrate 10 and the second substrate 20 in the display module 100, the first substrate 10 and the second substrate 20 are both located on one side of the light emission direction of the display panel, and the first substrate 10 is located on the side of the second substrate 20 away from the display panel. The first substrate 10, the first electrode 11, the second substrate 20, the second electrode 21 and the electrophoretic liquid between them serve only as a privacy protection layer in the display module 100, modulating the angle of the emitted light from the display panel. In this embodiment, the first electrode 11 located on the first substrate 10 can be reused as a touch electrode, realizing both the privacy protection function and the touch function of the display module 100, meeting the diverse needs of users.

[0058] Please refer to Figure 13 In another optional embodiment provided in this disclosure, the first substrate 10 is provided with a touch electrode; the second substrate 20 is provided with a light-emitting device, and the second electrode 21 is located on the side of the light-emitting device close to the first substrate 10; the first electrode 11 is reused as a touch electrode. That is, the second substrate 20 is reused as a light-emitting substrate 51, and the second substrate 20 may include other film layers such as a driving layer and a light-emitting device layer. The light-emitting device layer includes light-emitting devices arranged in an array, and the second electrode 21 is located on the side of the light-emitting device facing the first substrate 10. In this embodiment, the second substrate 20 can not only serve as a component of the privacy protection layer, but also serve as a light-emitting substrate 51 to emit light, which can reduce the film layer thickness and is beneficial to the thinner display of the display module 100. The first electrode 11 located on the first substrate 10 is reused as a touch electrode, which can realize both privacy protection and touch function, meeting the diverse needs of users.

[0059] Thus, by reusing the first electrode 11 on the first substrate 10 as a touch electrode, the privacy function can be realized, the light transmittance of the display module 100 in the non-privacy state can be improved, and the touch function of the display module 100 can also be realized to meet the diverse needs of users.

[0060] Figure 14 The figure shown is a plan view of a display device provided in an embodiment of this disclosure. Please refer to it. Figure 14 This disclosure provides a display device 200, including the display module 100 as described above. The display device 200 provided in this disclosure can be any electronic device with privacy protection functions, such as a privacy display screen, mobile phone, tablet computer, laptop computer, e-reader, or television. The display device 200 provided in this disclosure has the beneficial effects of the display module 100 provided in this disclosure. For details, please refer to the specific descriptions of the display module 100 in the above embodiments; these descriptions will not be repeated here.

[0061] Understandable Figure 14 The shape of the display device 200 is illustrated using only a right-angled rectangle structure as an example. In some other embodiments of this disclosure, the display device 200 may also be circular, elliptical or any other feasible shape, and this disclosure does not specifically limit it in this regard.

[0062] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display module, characterized in that, include: A first substrate and a second substrate are disposed opposite to each other to form a cavity; An electrophoretic solution is filled in the chamber, and the electrophoretic solution includes light-shielding particles; The first electrode is disposed on the side of the first substrate facing the electrophoretic solution; The second electrode is disposed on the side of the second substrate facing the electrophoretic solution, and, A transparent pillar array is disposed on the second substrate and located on the side of the second electrode opposite to the second substrate. The transparent pillar array includes a plurality of transparent pillars, which cover a portion of the second electrode and expose a portion of the second electrode. Along the thickness direction of the display module, the first electrode overlaps with the second electrode exposed by the transparent pillar.

2. The display module as described in claim 1, characterized in that, The second electrode is a strip electrode, and the first electrode is a planar electrode.

3. The display module as described in claim 1, characterized in that, Both the first electrode and the second electrode are strip-shaped electrodes.

4. The display module as described in claim 3, characterized in that, The first electrode and the second electrode are arranged in the same direction.

5. The display module as described in claim 3, characterized in that, The first electrode and the second electrode are arranged in opposite directions.

6. The display module as described in claim 1, characterized in that, The display module includes multiple first regions 40, each first region 40 includes n×n pixel groups, and each first region 40 includes an integer number of transparent pillars arranged in an array, where n is an integer greater than or equal to 3.

7. The display module as described in claim 6, characterized in that, Along a direction parallel to the plane where the display module is located, the cross-sectional area of ​​the transparent pillar is not equal to the area of ​​the pixel group.

8. The display module as described in claim 1, characterized in that, The cross-section of the transparent column is an equilateral polygon, and the number of sides of the equilateral polygon is greater than or equal to 4.

9. The display module as described in claim 8, characterized in that, The transparent column includes multiple apex corners, and the included angle between two adjacent sides of the equilateral polygon is the apex corner; in the thickness direction of the display module, the second electrode overlaps with two opposite apex corners of the transparent column.

10. The display module as described in claim 8, characterized in that, The transparent column array includes multiple transparent column rows and multiple transparent column columns, with the transparent columns in adjacent transparent column rows arranged alternately and the transparent columns in adjacent transparent column columns arranged alternately.

11. The display module as described in claim 1, characterized in that, The display module includes a display panel, the first substrate and the second substrate are located on one side of the light emission direction of the display panel, and the second substrate is located on the side of the first substrate facing the display panel; The first electrode is reused as a touch electrode.

12. The display module as described in claim 1, characterized in that, The first substrate is provided with a touch electrode; the second substrate is provided with a light-emitting device, and the second electrode is located on the side of the light-emitting device closer to the first substrate; the first electrode is reused as the touch electrode.

13. A display device, characterized in that, Includes the display module as described in any one of claims 1-12.

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