Display device

Abstract

The present disclosure provides a display device. The display device comprises: a display panel; and a grating structure located on the light-emitting side of the display panel, wherein the grating structure comprises a plurality of grating units; wherein the grating unit comprises: a first electrode having at least one first bending portion; a second electrode having at least one second bending portion; and a dielectric layer disposed between the first electrode and the second electrode. The solution of the present disclosure forms a bent grating structure based on a double-layer electrode having a bending portion, breaks the periodicity and regularity between the display panel and the grating structure, and effectively avoids the generation of moiré.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display device. Background Art

[0002] In display devices, the stacked structure may cause moiré patterns, which may affect the visual effect. In particular, in anti-peep naked-eye three-dimensional (3D) display devices, the regular stacking of the display panel, grating structure and supporting structure may cause overlapping of stripes, resulting in severe moiré patterns.

[0003] Regarding the avoidance of moiré patterns in display devices in the related art, such as simply changing the design of the display panel, the moiré patterns cannot be effectively reduced because factors such as resolution and aperture ratio need to be considered. Summary of the invention

[0004] In view of this, an object of the present disclosure is to provide a display device to solve or partially solve the above problems.

[0005] The present disclosure provides a display device, comprising:

[0006] display panel; and

[0007] A grating structure, located at the light-emitting side of the display panel, the grating structure comprising a plurality of grating units;

[0008] Wherein, the grating unit comprises:

[0009] The first electrode has at least one first bending portion;

[0010] A second electrode having at least one second bent portion; and

[0011] The dielectric layer is arranged between the first electrode and the second electrode.

[0012] It can be seen from the above that the display device provided by the present disclosure forms a bent grating structure based on a double-layer electrode with a bent portion, which breaks the periodicity and regularity between the display panel and the grating structure and effectively avoids the generation of moiré patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1A A schematic diagram of an exemplary display device is shown.

[0015] Figure 1B Shows Figure 1A Schematic diagram of the display effect of the display device.

[0016] Figure 2A A schematic structural diagram of an exemplary display device provided by an embodiment of the present disclosure is shown.

[0017] Figure 2B An electrode arrangement diagram of an exemplary grating structure of a display device according to an embodiment of the present disclosure is shown.

[0018] Figure 2C A transmission equivalent diagram of an exemplary grating structure of a display device according to an embodiment of the present disclosure is shown.

[0019] Figure 2D A schematic diagram of the enlarged structure of the electrode of the grating structure according to an embodiment of the present disclosure is shown.

[0020] Figure 3A A schematic diagram showing an exemplary projection relationship between a spacer and a first substrate is shown.

[0021] Figure 3B Another schematic diagram of an exemplary projection relationship between the spacer and the first substrate is shown.

[0022] Figure 4 A schematic structural diagram of another exemplary display device provided by an embodiment of the present disclosure is shown.

[0023] Figure 5 A display effect diagram of an exemplary display device provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0025] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] The appearance of moiré is generally related to the periodicity of an object, and is the visual result of interference between objects at a constant angle and frequency. Taking the simplest straight stripes as an example, when two sets of straight stripes with similar periods are superimposed together, it is possible to produce a set of interference stripes with a larger period. This set of interference stripes is moiré, and its period is the least common multiple of the two sets of stripe periods. In an anti-peep naked-eye 3D display device, the black matrix stripes in the display panel overlap with the stripes of the grating structure, and the spacers used for support are regularly arranged above the black matrix area, resulting in serious moiré phenomenon.

[0027] Figure 1A A schematic diagram of an exemplary display device 100 is shown.

[0028] like Figure 1A As shown, the display device 100 may be an anti-peeping naked-eye 3D display device, and may further include a grating layer 102 for achieving naked-eye 3D and anti-peeping effects, a support layer 104 for supporting the grating layer 102, and a display panel 106 for displaying. The three-layer structure of the grating layer 102, the support layer 104, and the display panel 106 each has its own periodic structural design, so the superposition of the three-layer structure may produce severe moiré patterns, such as Figure 1B shown.

[0029] Regarding the avoidance of moiré patterns in display devices in the related art, such as simply changing the design of the display panel, the parameters of the grating structure, and the size of the supporting spacers, the moiré patterns cannot be completely eliminated because it is necessary to consider factors that affect the display effect, such as resolution and aperture ratio.

[0030] In view of this, the embodiment of the present disclosure provides a display device, including a display panel, and a bent grating structure formed based on a double-layer electrode with a bent portion. By forming the grating structure with a bent portion, the periodicity and regularity between the stacked structures are broken, and the generation of moiré is effectively avoided. In addition, under the condition of reasonable design, the solution of the present disclosure does not affect the original display effect.

[0031] Figure 2A FIG. 2 is a schematic diagram showing an exemplary display device 200 provided by an embodiment of the present disclosure. Figure 2A As shown, the display device 200 provided by the embodiment of the present disclosure may include a display panel 206 and a grating structure 202 disposed on the light-emitting side of the display panel 206 . The grating structure 202 may further include a plurality of repeatedly arranged grating units 202A.

[0032] like Figure 2A As shown, in some optional embodiments, the grating unit 202A may further include a first electrode 2028, a second electrode 2030, and a dielectric layer 2024 disposed between the first electrode 2028 and the second electrode 2030. Figure 2A As shown, the grating structure 202 may further include substrates 2022 and 2026 , and the first electrodes 2028 and the second electrodes 2030 may be arranged at equal intervals on the substrates 2022 and 2026 , respectively.

[0033] Figure 2B A schematic diagram of the arrangement of electrodes in the grating structure 202 according to an embodiment of the present disclosure is shown.

[0034] like Figure 2B As shown, from the top view of the distribution diagram of the first electrode 2028 or the second electrode 2030, it can be known that in some embodiments, the first electrode 2028 or the second electrode 2030 can extend along the first direction x, and can be arranged at equal intervals along a third direction z perpendicular to the first direction x. An electric field can be formed between the first electrode 2028 and the second electrode 2030 to control the change of the dielectric layer 2024, so that the grating structure 202 can form gratings of different sizes.

[0035] In some embodiments, the first electrode 2028 and the second electrode 2030 can be made of conductive materials such as ITO (Indium Tin Oxide) film. ITO is an N-type oxide semiconductor, and the ITO film is an indium tin oxide semiconductor transparent conductive film, which can be used as a transparent electrode, thereby not affecting the light transmittance.

[0036] In some optional embodiments, the dielectric layer 2024 disposed between the first electrode 2028 and the second electrode 2030 may include liquid crystal. Liquid crystal is a soft substance between liquid and solid, and liquid crystal molecules are deflected in the electric field formed above, and this deflection causes the optical orientation of the liquid crystal layer to change, and the transmittance changes, thereby forming a grating structure.

[0037] In this embodiment, the liquid crystal grating has a 3D visual effect. The working principle of 3D display technology is: for the same scene, the left eye and the right eye of the viewer receive images respectively, and the distance between the two eyes of the viewer in the horizontal direction (i.e., the pupil distance, about 65mm) makes the viewing angles of the two eyes slightly different. Due to the existence of this difference, the images observed by the left eye and the right eye of the viewer will also be slightly different. This difference is called "binocular parallax", and the different images observed by the left and right eyes constitute a pair of "stereoscopic image pairs" and are fused by the visual cortex of the brain to form a stereoscopic effect.

[0038] In this embodiment, the liquid crystal molecules of each grating unit are deflected under the action of the electric field formed between the first electrode 2028 and the second electrode 2030, thereby controlling the passage or non-passage of the light incident on the liquid crystal grating, and obtaining a light-transmitting area and a non-light-transmitting area. Specifically, the liquid crystal molecules corresponding to the area where the electric field exists are deflected, and the other liquid crystal molecules are not deflected. At this time, after the light enters the liquid crystal layer, it will gradually change the polarization direction when passing through the liquid crystal that has not been deflected. When reaching the polarizer, the vibration direction of the polarized light is parallel to the absorption axis of the polarizer, and the light passes through to form the light-transmitting area of ​​the liquid crystal grating; while the light does not change the polarization direction when passing through the deflected liquid crystal, and when reaching the polarizer, the vibration direction of the polarized light is perpendicular to the absorption axis of the polarizer, and the light does not pass through to form the non-light-transmitting area of ​​the liquid crystal grating; thereby separating the visible images of the left and right eyes, and achieving a 3D display effect.

[0039] In another embodiment, the dielectric layer 2024 disposed between the first electrode 2028 and the second electrode 2030 may include a dielectric liquid. The electric field formed by the voltage difference between the first electrode 2028 and the second electrode 2030 drives the dielectric liquid in the dielectric layer 2024 to move, thereby forming a grating.

[0040] Further, such as Figure 2B As shown, the first electrode 2028 may have at least one first bending portion 20282 , and the second electrode 2030 may have at least one second bending portion 20302 . Figure 2C FIG. 2 shows a transmission equivalent diagram of the grating structure 202 in the embodiment of the present disclosure. Figure 2CAs shown, because the electrode in the grating structure is configured to have a bending portion, the edge of the light-transmitting area in the equivalent transmission diagram of the grating structure 202 is formed into a curved shape. In this way, by arranging the grating structure 202 in the display device 200, the linear structure of the grating unit in the grating structure in the related art can be broken, thereby improving the problem of moiré.

[0041] In some embodiments, the angle between the first bending portion 20282 and / or the second bending portion 20302 and the first direction x is less than or equal to 6°, so that the opening ratio can be guaranteed. Figure 2D FIG. 2 shows an enlarged schematic diagram of a single electrode according to an embodiment of the present disclosure. Figure 2D As shown, taking the first electrode 2028 as an example, its first bent portion 20282 may include a first edge 20282a and a second edge 20282b. Here, the angle between the first bent portion 20282 and the first direction x may refer to the angles α and β in the figure, i.e., the angle between the first edge 20282a and the second edge 20282b and the first direction x. Therefore, taking the clockwise direction of the plane where the first electrode 2028 or the second electrode 2030 is located as the positive direction, the angle between at least one of the first bent portion and the second bent portion and the first direction x may be not less than -6° and not more than 6°, so as to avoid the generation of moiré patterns while not affecting the original display effect of the grating structure 101.

[0042] In addition, in some embodiments, the number of at least one of the first bending portion and the second bending portion of the grating unit can be 2-6. In this way, the grating structure is prevented from bending too many times, which reduces the light-transmitting area formed by the grating, weakens the intensity of light passing through the liquid crystal grating, and further reduces the aperture ratio. At the same time, it avoids the problem that when only one bending occurs, that is, only the linear grating is tilted at a certain angle, the effect of avoiding the generation of moiré may be poor.

[0043] Back to Figure 2A In some embodiments, the display panel 206 may further include a first substrate 2062, a second substrate 2070 disposed opposite to the first substrate 2062, and a liquid crystal layer 2068 disposed between the first substrate 2062 and the second substrate 2070. It can be understood that the first substrate 2062 and the second substrate 2070 may be an array substrate, a color filter substrate, or a panel including the functions of both an array substrate and a color filter substrate, which is not limited in this embodiment.

[0044] Furthermore, at least one of the first substrate 2062 and the second substrate 2070 may be provided with a black matrix layer 2064. Figure 2AAs shown, the first substrate 2062 may be a color filter substrate, and the black matrix layer 2064 may be disposed on the color filter substrate. The black matrix layer 1032 may be composed of horizontal and vertical crossing lines, which divide the black matrix into a light-transmitting area and a non-light-transmitting area, wherein the light-transmitting area may also be provided with a corresponding color filter (e.g., color filters of three colors of red, green, and blue).

[0045] In some optional embodiments, such as Figure 2A As shown, a support structure for supporting the grating structure 204 may be further provided between the display panel 206 and the grating structure 204. Figure 2A As shown, the support structure may include a plurality of first spacers 204 .

[0046] As an optional embodiment, Figure 2A As shown, the display panel 206 may also include a plurality of second spacers 2066 disposed on the first substrate 2062 or the second substrate 2070. The first spacers 204 and / or the second spacers 2066 may be made of various resin materials, specifically including but not limited to acrylic resin, and may also be glass beads, etc. The shape of the spacers is not further limited here, and may include spherical spacers, columnar spacers, etc.

[0047] Figure 3A FIG. 2 shows a schematic diagram of the projection relationship between the first spacer 204 or the second spacer 2066 and the color filter substrate (eg, the first substrate 2062). Figure 3A As shown, a plurality of first spacers 204 or second spacers 2066 are arranged at equal intervals along the second direction y and the third direction z, and the second direction y intersects with the first direction x (the extension direction of the electrodes in the grating structure 202). In this way, by setting the arrangement direction of the spacers (the second direction y) to be at an angle with the extension direction of the electrodes in the grating structure 202 (the first direction x), the same arrangement rule design adopted by the grating arrangement and the spacer arrangement in the related art is broken, thereby improving the moiré problem. In some embodiments, in order to avoid the loss of aperture ratio caused by the spacers blocking the light-transmitting area, the angle between the second direction y and the first direction x can be less than or equal to 8°, thereby ensuring that the orthographic projection of the spacers 204 / 2066 on the first substrate 2062 is as far as possible within the orthographic projection of the black matrix layer 2064 on the first substrate 2062.

[0048] In this embodiment, Figure 3AAs shown, the orthographic projections of the plurality of first spacers 204 and / or the second spacers 2066 on the first substrate 2062 are all located in the orthographic projections of the area formed by extending a predetermined distance from the edge of the non-light-transmitting area of ​​the black matrix layer 2064 to the light-transmitting area on the first substrate 2062. If the orthographic projections of the plurality of first spacers 204 and / or the second spacers 2066 on the first substrate 2062 are all located within the orthographic projections of the non-light-transmitting area of ​​the black matrix layer 2064 on the first substrate 2062, the spacers are completely covered by the black matrix, resulting in the spacers themselves having no effect on the transmission of light except for the separation and support functions. Based on this, simply changing the arrangement pattern between the spacers has little effect on the periodicity and regularity between the laminated structures of the display device, and thus the moiré pattern cannot be completely eliminated. Therefore, in this embodiment, a portion of the first spacers 204 and / or the second spacers 2066 are arranged outside the non-light-transmitting area of ​​the black matrix layer 2064 (such as Figure 3A As shown), the overlapping rule of the display device in the related art can be broken.

[0049] Specifically, the predetermined distance may be less than or equal to 10 μm. The edge of the non-light-transmitting area of ​​the black matrix layer 2064 is extended outward by a predetermined distance to form a target area, and the orthographic projections of the plurality of first spacers 204 and / or second spacers 2066 on the first substrate 2062 are located in the orthographic projections of the target area on the first substrate 2062. If the predetermined distance is greater than 10 μm, the spacers are located in the AA area at a high ratio, which may affect the aperture ratio of the display device and thus affect the display effect.

[0050] Furthermore, in some embodiments, the spacing of the plurality of first spacers 204 and / or second spacers 2066 along the third direction z (e.g., the distance between the axes of adjacent spacers) and the spacing of the grating units 202A along the third direction z (e.g., the distance between the same side edges of the first electrodes of adjacent grating units) do not have an integer multiple relationship, thereby avoiding moiré patterns caused by regular overlap between the grating structure and the spacers when they are arranged in an integer multiple relationship.

[0051] Figure 3B FIG. 2 shows another schematic diagram of the projection relationship between the first spacer 204 or the second spacer 2066 and the color filter substrate (eg, the first substrate 2062). Figure 3BAs shown, in another embodiment, the plurality of first spacers 204 or the second spacers 2066 do not have a regular arrangement, that is, the arrangement of the spacers is arbitrary or random. Of course, it can be understood that the arrangement of the plurality of first spacers 204 or the second spacers 2066 still needs to consider the above factors affecting the aperture ratio and generating moiré: the spacing of the plurality of first spacers 204 and / or the second spacers 2066 along the third direction z does not have an integer multiple relationship with the spacing of the grating units along the third direction z; the orthographic projections of the plurality of first spacers 204 and / or the second spacers 2066 on the first substrate 2062 are all located in the orthographic projection of the area formed by extending outward from the edge of the non-light-transmitting area of ​​the black matrix layer 2064 by a predetermined distance on the first substrate 2062, and the predetermined distance is less than or equal to 10μm.

[0052] It should be understood that the design of the number of the first bending portions and the second bending portions and their angles with the first direction in this embodiment needs to be modified synchronously with the arrangement of the plurality of first spacers 204 and / or the second spacers 2066. This may include: above the area formed by the edge of the non-light-transmitting area of ​​the black matrix layer 2064 extending outwards by a predetermined distance, the outward extension direction and the positive and negative angles of the first bending portions and the second bending portions with the first direction x need to be coordinated with each other.

[0053] Figure 4 A schematic diagram of another display device 200 provided by an embodiment of the present disclosure is shown.

[0054] like Figure 4 As shown, the display device 200 may further include: an anti-peeping film 208, which is disposed on a side of the grating structure 202 close to the display panel 206, for achieving an anti-peeping effect.

[0055] Based on the bent grating structure formed by the double-layer electrode with a bent portion, and multiple first spacers and second spacers arranged at a certain angle or irregularly with respect to the extension direction of the electrode, both anti-peeping and naked-eye 3D visual effects can be achieved simultaneously, and the periodicity and regularity between the stacked structures are changed to effectively avoid the generation of moiré patterns. Figure 5 FIG. 2 shows a display effect diagram of a display device according to an embodiment of the present disclosure. Figure 5 As shown, the display device provided by the embodiment of the present disclosure can well improve the problem of moiré.

[0056] It should be noted that the display device can be a product with an image display function, such as: a monitor, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query equipment and monitors of e-government, banks, hospitals, power and other departments).

[0057] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may also be combined, and there are many other variations of different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0058] While the disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0059] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display device, characterized in that: include: Display panel; as well as A grating structure, located at the light-emitting side of the display panel, the grating structure comprising a plurality of grating units; Wherein, the grating unit comprises: The first electrode has at least one first bending portion; A second electrode having at least one second bent portion; and a dielectric layer, disposed between the first electrode and the second electrode; The first electrode and the second electrode extend along a first direction, a plurality of first spacers are arranged between the display panel and the grating structure, the plurality of first spacers are arranged at equal intervals along a second direction and a third direction, the second direction intersects with the first direction, the third direction is perpendicular to the first direction, or the plurality of first spacers have no arrangement regularity; Wherein, the display panel comprises: a first substrate; a second substrate disposed opposite to the first substrate; and a liquid crystal layer, disposed between the first substrate and the second substrate; Wherein, a plurality of second spacers are disposed on the first substrate or the second substrate, the plurality of second spacers are arranged at equal intervals along the second direction and the third direction, the second direction intersects with the first direction, the third direction is perpendicular to the first direction, or the plurality of second spacers have no arrangement regularity; Wherein, the spacing of the plurality of first spacers along the third direction does not have an integer multiple relationship with the spacing of the grating units along the third direction; and / or the spacing of the plurality of second spacers along the third direction does not have an integer multiple relationship with the spacing of the grating units along the third direction; Wherein, at least one of the first substrate and the second substrate is provided with a black matrix layer; the black matrix layer has a light-transmitting area and a non-light-transmitting area, and after the edge of the non-light-transmitting area is extended toward the light-transmitting area by a predetermined distance, the extended area and the non-light-transmitting area constitute a target area; the orthographic projections of the plurality of first spacers and the plurality of second spacers on the first substrate are located in the orthographic projections of the target area on the first substrate.

2. The display device according to claim 1, characterized in that An angle between at least one of the first bending portion and the second bending portion and the first direction is less than or equal to 6°.

3. The display device according to claim 1, characterized in that The number of at least one of the first bending portions and the second bending portions is 2-6.

4. The display device according to claim 1, characterized in that An orthographic projection of the first electrode on the display panel partially overlaps with an orthographic projection of the second electrode on the display panel.

5. The display device according to claim 1, characterized in that: An included angle between the second direction and the first direction is less than or equal to 8°.

6. The display device according to claim 1, characterized in that: The predetermined distance is less than or equal to 10 μm.

7. The display device according to any one of claims 1 to 6, characterized in that: The dielectric layer includes dielectric liquid or liquid crystal.

Images