Display device

Abstract

The invention relates to a display device. The display device comprises a flat display panel, a first optical unit and a second optical unit, the display device has a first display mode, the first optical unit forms a light shielding part and a light transmitting part, the second optical unit forms a plurality of liquid crystal lens units, and the edge areas of the liquid crystal lens units and the light shielding part are overlapped in the thickness direction of the display device. The middle area of the liquid crystal lens unit and the light transmitting part are overlapped in the thickness direction of the display device. In the application, in the first display mode, the second optical unit can form a liquid crystal lens unit, and the light emitted by the flat display panel passes through the second optical unit to realize stereoscopic display; the first optical unit forms a shading part and a light transmitting part, the shading part can shade light in the edge area of the liquid crystal lens unit and reduce non-ideal deflection of the light in the edge area of the liquid crystal lens unit, so that light crosstalk is reduced, and the light transmitting part allows normal light transmission and does not affect three-dimensional display.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display device. Background Technology

[0002] The core principle of glasses-free stereoscopic (3D) display devices is to integrate dedicated optical units such as parallax barriers, lenticular lenses, or liquid crystal apertures at the front end of a two-dimensional (2D) display panel. Through optical control, parallax images from different perspectives are directed and projected to the viewer's left and right eyes, utilizing the binocular visual fusion effect to achieve stereoscopic imaging. However, in 3D display mode, the display device suffers from significant crosstalk in the viewing area, which can easily affect the clarity and comfort of stereoscopic vision. Summary of the Invention

[0003] This application provides a display device to improve the technical problem of significant viewport crosstalk in 3D display mode.

[0004] To achieve the above objectives, this application provides a display device, comprising: Flat panel display; The first optical unit is disposed on one side of the light-emitting surface of the flat panel display; The second optical unit is disposed on the side of the first optical unit away from the flat panel display; The display device has a first display mode. In the first display mode, the first optical unit forms a light-shielding part and a light-transmitting part. In the first display mode, the second optical unit forms a plurality of liquid crystal lens units. The light transmittance of the light-shielding part is less than that of the light-transmitting part. The edge region of the liquid crystal lens unit overlaps with the light-shielding part in the thickness direction of the display device, and the middle region of the liquid crystal lens unit overlaps with the light-transmitting part in the thickness direction of the display device.

[0005] Optionally, the first optical unit includes: First liquid crystal layer; A first electrode layer is disposed on the side of the first liquid crystal layer near the flat panel display panel, and the first electrode layer includes a plurality of first electrodes; The second electrode layer is disposed on the side of the first liquid crystal layer away from the flat panel display panel, and the second electrode layer includes a plurality of second electrodes; The first electrode and the second electrode overlap in the thickness direction of the display device to form an overlapping area, and the first optical unit also includes a non-overlapping area located between two adjacent overlapping areas; in the first display mode, the overlapping area forms the light-shielding part, and the non-overlapping area forms the light-transmitting part.

[0006] Optionally, in the first display mode, the first electrode layer and the second electrode layer form an electric field to drive the liquid crystal molecules in the first liquid crystal layer to deflect, and the optical rotation angle of the first liquid crystal layer corresponding to the overlapping area is smaller than the optical rotation angle of the first liquid crystal layer corresponding to the non-overlapping area.

[0007] Optionally, the second optical unit includes: Second liquid crystal layer; A third electrode layer is disposed on the side of the second liquid crystal layer near the flat panel display panel, and the third electrode layer includes a plurality of third electrodes; A fourth electrode layer is disposed on the side of the second liquid crystal layer away from the flat panel display panel, and the fourth electrode layer is disposed entirely. Wherein, the orthogonal projection of the third electrode onto the first optical unit is at least partially located within the overlapping region.

[0008] Optionally, the third electrode corresponds one-to-one with the first electrode, and the third electrode corresponds one-to-one with the second electrode. Optionally, in the first display mode, the third electrode layer and the fourth electrode layer form an electric field to drive the liquid crystal molecules in the second liquid crystal layer to deflect and form a plurality of liquid crystal lens units; The edge region of the liquid crystal lens unit overlaps with the third electrode in the thickness direction of the display device, while the middle region of the liquid crystal lens unit is offset from the third electrode in the thickness direction of the display device.

[0009] Optionally, the display device further has a second display mode, in which the optical rotation angle of the first liquid crystal layer corresponding to the overlapping area and the optical rotation angle of the first liquid crystal layer corresponding to the non-overlapping area are the same.

[0010] Optionally, in the first display mode, the first electrode layer and the second electrode layer form an electric field, and the third electrode layer and the fourth electrode layer form an electric field; in the second display mode, the first electrode layer and the second electrode layer do not form an electric field, and the third electrode layer and the fourth electrode layer do not form an electric field.

[0011] Optionally, the flat panel display includes a plurality of sub-pixels, each sub-pixel including a light-emitting area and a non-light-emitting area located between two adjacent light-emitting areas; Wherein, the orthographic projection of the light-shielding part on the flat panel is at least partially located within the non-light-emitting area.

[0012] Optionally, in the arrangement direction of the light-shielding portion, the width of the light-shielding portion is smaller than the width of the light-transmitting portion.

[0013] In the display device of this application embodiment, by providing a first optical unit and a second optical unit on one side of the light-emitting surface of the flat panel, in the first display mode, the second optical unit can form a liquid crystal lens unit, so that the light emitted from the flat panel can achieve stereoscopic display after passing through the second optical unit; the first optical unit forms a light-shielding part and a light-transmitting part in the first display mode, the light-shielding part can block the light in the edge area of ​​the liquid crystal lens unit, reduce the undesirable deflection of the light in the edge area of ​​the liquid crystal lens unit, thereby reducing light crosstalk, and the light-transmitting part allows light to pass through normally without affecting the stereoscopic display.

[0014] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0016] Figure 1 This is a top view of a planar display panel provided in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at point CC; Figure 3 This is a cross-sectional structural diagram of the display device provided in the exemplary embodiment of this disclosure in the first display mode; Figure 4 yes Figure 3 A schematic diagram illustrating the working principle of the first optical unit of the display device in the image; Figure 5 This is a cross-sectional structural diagram of the display device provided in the exemplary embodiment of this disclosure in the second display mode; Figure 6 This is a schematic diagram illustrating the working principle of a display device provided in an exemplary embodiment of this disclosure; Figure 7 This is a schematic diagram illustrating the working principle of another display device provided in an exemplary embodiment of this disclosure.

[0017] Explanation of reference numerals in the attached figures: 1-Flat panel display; AA-Display area; NA-Non-display area; 10-Subpixel; 10a-Light emitting area; 10b-Non-light emitting area; 13-Substrate; 131-Driving circuit layer; 14-Opposing substrate; 141-Color filter layer; 15-Third liquid crystal layer; 2-First optical unit; 201-Light-shielding part; 202-Light-transmitting part; 21-First liquid crystal layer; 22-First electrode layer; 221-First electrode; 23-Second electrode layer; 231-Second electrode; 24-First substrate; 25-Second substrate; 26-First polarizer; 27-Second polarizer; 3-Second optical unit; 301-Liquid crystal lens unit; 31-Second liquid crystal layer; 32-Third electrode layer; 321-Third electrode; 33-Fourth electrode layer; 34-Third substrate; 35-Fourth substrate; 4-Backlight module; W1 - Width of the light-shielding part 201; W2 - Width of the light-transmitting part 202. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0019] This application provides a display device, such as... Figures 1 to 5 As shown, the device includes a flat panel display 1, a first optical unit 2, and a second optical unit 3. The first optical unit 2 is disposed on one side of the light-emitting surface of the flat panel display 1. The second optical unit 3 is disposed on the side of the first optical unit 2 away from the flat panel display 1. The display device has a first display mode. In the first display mode, the first optical unit 2 forms a light-shielding part 201 and a light-transmitting part 202. In the first display mode, the second optical unit 3 forms a plurality of liquid crystal lens units 301. The light transmittance of the light-shielding part 201 is less than that of the light-transmitting part 202. The edge region of the liquid crystal lens unit 301 overlaps with the light-shielding part 201 in the thickness direction of the display device, and the middle region of the liquid crystal lens unit 301 overlaps with the light-transmitting part 202 in the thickness direction of the display device.

[0020] In some embodiments, the flat panel display 1 can be an LCD panel, an OLED panel, a Mini-LED panel, a Micro-LED panel, etc. The flat panel display 1 can be used to display flat images (2D images).

[0021] In some embodiments, such as Figure 2As shown, the flat panel display 1 is an LCD panel. The flat panel display 1 includes a substrate 13 and a counter substrate 14, with a third liquid crystal layer 15 disposed between the substrate 13 and the counter substrate 14. A driving circuit layer 131 is disposed on the side of the substrate 13 closest to the third liquid crystal layer 15. A color filter layer 141 is disposed on the side of the counter substrate 14 closest to the third liquid crystal layer 15. The color filter layer 141 includes a color resist and a black matrix.

[0022] It should be understood that the LCD panel cannot emit light, and the display device is also equipped with a backlight module 4, which is located on the non-light-emitting side of the LCD to provide a backlight for the LCD panel.

[0023] like Figure 1 As shown, the flat panel display 1 includes a display area AA and a non-display area NA disposed around the display area AA. The display area AA may be provided with multiple sub-pixels 10, which may include red sub-pixels 10, green sub-pixels 10, and blue sub-pixels 10, thereby realizing color display. The display area AA is provided with a pixel driving circuit, which is used to drive the sub-pixels 10 to display. The non-display area NA may be provided with a gate driving circuit, etc., which can provide driving signals for the sub-pixels 10.

[0024] like Figure 3 As shown, the first display mode is a stereoscopic display mode. In the first display mode, the first optical unit 2 forms a light-shielding part 201 and a light-transmitting part 202. The light-shielding part 201 can block most of the light, while the light-transmitting part 202 allows most of the light to pass through. The light transmittance of the light-shielding part 201 is less than that of the light-transmitting part 202.

[0025] In some embodiments, the light transmittance of the light-shielding portion 201 may be less than 10%, for example, the light transmittance of the light-shielding portion 201 may be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc.

[0026] In some embodiments, the light transmittance of the light-transmitting portion 202 can be greater than 90%. For example, the light transmittance can be 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc.

[0027] In some embodiments, the first optical unit 2 may be a liquid crystal aperture, etc., but is not limited thereto.

[0028] In some embodiments, the second optical unit 3 may be a liquid crystal lens or the like, but is not limited thereto.

[0029] like Figure 3As shown, in the first display mode, the second optical unit 3 forms multiple liquid crystal lens units 301. The liquid crystal lens units 301 can deflect light and project parallax images from different perspectives to the left and right eyes of the viewer, thereby achieving stereoscopic imaging by utilizing the binocular vision fusion effect of the human eye.

[0030] like Figure 4 As shown in (a), in the edge region of the liquid crystal lens unit 301, light is prone to undesirable deflection, causing a portion of the light that should have entered the left eye to enter the right eye, or a portion of the light that should have entered the right eye to enter the left eye. This can cause ghosting of the image, i.e., visual crosstalk.

[0031] It should be noted that, as Figure 4 As shown in (a), since the deflection angle of light in the edge region of the liquid crystal lens unit 301 is greater than that in the middle region of the liquid crystal lens unit 301, the edge region of the liquid crystal lens unit 301 is more prone to imperfect light deflection, while the deflection angle of light in the middle region of the liquid crystal lens unit 301 is smaller, and therefore, imperfect light deflection is less likely to occur.

[0032] like Figure 3 and Figure 4 As shown in (b), the edge region and the middle region of the liquid crystal lens unit 301 are arranged adjacent to each other. For a liquid crystal lens unit 301, the liquid crystal lens unit 301 has a middle region and edge regions located on both sides of the middle region. The light-shielding part 201 can block the light incident on the edge region of the liquid crystal lens unit 301, while the light-transmitting part 202 can allow the light incident on the middle region of the liquid crystal lens unit 301.

[0033] In the embodiments of this application, such as Figure 3 As shown, a first optical unit 2 is disposed between the flat panel display 1 and the second optical unit 3. In the first display mode, the first optical unit 2 can form a light-shielding part 201 and a light-transmitting part 202. The light-shielding part 201 corresponds to the edge region of the liquid crystal lens unit 301, and the light-transmitting part 202 corresponds to the middle region of the liquid crystal lens. Since the light-transmitting part 202 allows most of the light to pass through, it will not affect the stereoscopic display. And the light-shielding part 201 can block most of the light, thus reducing the undesirable deflection of light in the edge region of the liquid crystal lens unit 301 and reducing viewing area crosstalk.

[0034] Optionally, such as Figure 3As shown, the first optical unit 2 includes a first liquid crystal layer 21, a first electrode layer 22, and a second electrode layer 23. The first electrode layer 22 is disposed on the side of the first liquid crystal layer 21 close to the flat panel 1, and includes a plurality of first electrodes 221. The second electrode layer 23 is disposed on the side of the first liquid crystal layer 21 away from the flat panel 1, and includes a plurality of second electrodes 231. The first electrodes 221 and the second electrodes 231 overlap in the thickness direction of the display device to form an overlapping area. The first optical unit 2 also includes a non-overlapping area located between two adjacent overlapping areas. In the first display mode, the overlapping area forms a light-shielding part 201, and the non-overlapping area forms a light-transmitting part 202.

[0035] The first electrode layer 22 and the second electrode layer 23 can be made of transparent conductive materials, which will not obstruct the display screen of the flat panel display panel 1. The first electrode layer 22 and the second electrode layer 23 can be any of the following: ITO (indium tin oxide), IZO (indium zinc oxide), IZTO (indium zinc tin oxide), IAZO (indium aluminum zinc oxide), IGZO (indium gallium zinc oxide), IGTO (indium gallium tin oxide), AZO (aluminum zinc oxide), ATO (antimony tin oxide), IGZTO (indium gallium zinc tin oxide), IGO (indium gallium oxide), InO (indium oxide).

[0036] like Figure 3 As shown, the first electrode layer 22 includes a plurality of first electrodes 221, with adjacent first electrodes 221 spaced apart, that is, the first electrode layer 22 is a patterned electrode.

[0037] The second electrode layer 23 includes a plurality of second electrodes 231, with adjacent second electrodes 231 spaced apart, that is, the second electrode layer 23 is a patterned electrode.

[0038] The first liquid crystal layer 21 is disposed between the first electrode layer 22 and the second electrode layer 23, and the liquid crystal molecules in the first liquid crystal layer 21 can be deflected in the electric field formed by the first electrode layer 22 and the second electrode layer 23.

[0039] In some embodiments, the first optical unit 2 further includes a first substrate 24 and a second substrate 25, wherein the first substrate 24 and the second substrate 25 can be rigid materials or flexible materials. The rigid material can be glass, quartz, or silicon wafer. The flexible material can be one of polyimide (PI), polycarbonate (PC), polynorbornene (PNB), and polyethylene terephthalate (PET).

[0040] In some embodiments, such as Figure 3As shown, the first liquid crystal layer 21 can be a single, continuous layer. The first electrode 221 and the second electrode 231 overlap in the thickness direction of the display device, forming an overlap region. In the overlap region, the first electrode 221 and the second electrode 231 are directly opposite each other, forming a perpendicular electric field. Under the influence of this electric field, the liquid crystal molecules in the first liquid crystal layer 21 located in the overlap region change their deflection angle. In the non-overlapping region, no perpendicular electric field is formed between the first electrode 221 and the second electrode 231, and the liquid crystal molecules in the first liquid crystal layer 21 located in the non-overlapping region do not change their deflection angle. By controlling the deflection angles of the liquid crystal molecules in the overlap region and the non-overlapping region, a light-shielding portion 201 and a light-transmitting portion 202 can be formed. In other embodiments, the first liquid crystal layer 21 may be disposed only in the overlapping region and not in the non-overlapping region. This arrangement prevents the liquid crystal molecules in the non-overlapping region from being deflected by the first electrode 221 and the second electrode 231, thus avoiding any impact on the stereoscopic display effect. It should be noted that, in order to confine the first liquid crystal layer 21 within the overlapping region, a transparent material, such as glass or polyimide, can be disposed in the non-overlapping region.

[0041] Optionally, in the first display mode, such as Figure 3 As shown, the first electrode layer 22 and the second electrode layer 23 form an electric field to drive the liquid crystal molecules in the first liquid crystal layer 21 to deflect. The optical rotation angle of the first liquid crystal layer 21 corresponding to the overlapping area is smaller than the optical rotation angle of the first liquid crystal layer 21 corresponding to the non-overlapping area.

[0042] In some embodiments, the first liquid crystal layer 21 can be a twisted nematic liquid crystal (TN liquid crystal), etc. Without an applied electric field, the liquid crystal molecules of the twisted nematic liquid crystal are twisted by 90 degrees, meaning its optical rotation angle is 90 degrees. After applying a rated voltage (e.g., 5V), the liquid crystal molecules of the twisted nematic liquid crystal align along the direction of the electric field, the twisted structure disappears, and the optical rotation angle drops to 0 degrees. This means that by applying or not applying an electric field, the deflection angle of the liquid crystal molecules in the first liquid crystal layer 21 can be changed, and the deflection angle of the liquid crystal molecules affects their optical rotation angle. The optical rotation angle refers to the angle by which the polarization plane (vibration direction) of linearly polarized light rotates after passing perpendicularly through an anisotropic optically active material.

[0043] In the first display mode, such as Figure 3 As shown, a vertical electric field is formed in the overlapping region, which reduces the optical rotation angle of the liquid crystal molecules in the twisted nematic liquid crystal. In the non-overlapping region, the optical rotation angle of the liquid crystal molecules in the twisted nematic liquid crystal is 90 degrees.

[0044] It should be noted that the optical rotation angle of the liquid crystal molecules in the first liquid crystal layer 21 can be adjusted by changing the magnitude of the electric field formed by the first electrode layer 22 and the second electrode layer 23.

[0045] like Figure 3 As shown, the first optical unit 2 also includes a first polarizer 26 and a second polarizer 27. The first polarizer 26 is located on the side of the first electrode layer 22 away from the first liquid crystal layer 21, and the second polarizer 27 is located on the side of the second electrode layer 23 away from the first liquid crystal layer 21.

[0046] In some embodiments, such as Figure 6 As shown in the diagram, the arrows represent the polarization direction of the light. The light incident before the first polarizer 26 is unpolarized light. The transmission axes of the first polarizer 26 and the second polarizer 27 are perpendicular. The flat panel display 1 is a twisted nematic (TN) type panel. It should be understood that light with the same polarization direction as the transmission axis of the polarizer can pass through the polarizer, while light with a polarization direction different from the transmission axis of the polarizer cannot pass through the polarizer.

[0047] like Figure 6 As shown in (a), in some embodiments, when no electric field is applied, the polarization direction of the light after it enters from the first polarizer 26 is horizontal. After passing through the flat panel 1, the polarization direction of the light is still horizontal. When the optical rotation angle of the first liquid crystal layer 21 in the first optical unit 2 is 90 degrees, it can just change the polarization direction of the light to the vertical direction, so that it can exit from the second polarizer 27.

[0048] like Figure 6 As shown in (b), when an electric field is applied, the polarization direction of the light after it enters from the first polarizer 26 is horizontal. After passing through the flat panel 1, the polarization direction of the light is still horizontal. The optical rotation angle of the first liquid crystal layer 21 in the first optical unit 2 is 0 degrees, which does not change the polarization direction of the light. The polarization direction of the light is perpendicular to the direction of the transmission axis of the second polarizer 27, and it cannot exit from the second polarizer 27.

[0049] It should be noted that when the optical rotation angle of the first liquid crystal layer 21 in the first optical unit 2 is greater than 0 degrees and less than 90 degrees, only a portion of the light can be emitted from the second polarizer 27.

[0050] like Figure 6 As shown, in the embodiments of this application, the above-described settings allow the overlapping area to form a light-shielding portion 201 and the non-overlapping area to form a light-transmitting portion 202.

[0051] In other embodiments, such as Figure 7 As shown, Figure 7 The embodiments and Figure 6 The difference in the embodiments is that the flat panel display 1 is a vertical alignment (VA) type panel or an in-plane switching (IPS) type panel. In this case, the light transmission axes of the first polarizer 26 and the second polarizer 27 are parallel.

[0052] like Figure 7 As shown in (a), in some embodiments, when no electric field is applied, the polarization direction of the light after it enters from the first polarizer 26 is horizontal. After passing through the flat panel 1, the polarization direction of the light changes to vertical. When the optical rotation angle of the first liquid crystal layer 21 in the first optical unit 2 is 90 degrees, the polarization direction of the light changes to horizontal, and the light can exit from the second polarizer 27.

[0053] like Figure 7 As shown in (b), when an electric field is applied, the polarization direction of the light after entering from the first polarizer 26 is horizontal. After passing through the flat panel 1, the polarization direction of the light changes to vertical. The optical rotation angle of the first liquid crystal layer 21 in the first optical unit 2 is 0 degrees, which does not change the polarization direction of the light. The polarization direction of the light is perpendicular to the direction of the transmission axis of the second polarizer 27, and it cannot exit from the second polarizer 27.

[0054] It should be noted that when the optical rotation angle of the first liquid crystal layer 21 in the first optical unit 2 is greater than 0 degrees and less than 90 degrees, only a portion of the light can be emitted from the second polarizer 27.

[0055] In some embodiments, in the overlap region, after a vertical electric field is formed between the first electrode layer 22 and the second electrode layer 23, the optical rotation angle of the liquid crystal molecules in the twisted nematic liquid crystal is 0 degrees. Almost all linearly polarized light emitted from the first polarizer 26 cannot pass through the second polarizer 27; at this time, the transmittance of the light-shielding portion 201 is close to 0.

[0056] It should be noted that in some embodiments, the first polarizer 26 can be disposed on the side of the flat panel 1 away from the first optical unit 2. With the above arrangement, when the flat panel 1 is an LCD panel, the LCD panel and the first optical unit 2 can share the first polarizer 26 and the second polarizer 27, which simplifies the structure of the display device and also reduces the overall thickness of the display device.

[0057] Optionally, such as Figure 3As shown, the second optical unit 3 includes a second liquid crystal layer 31, a third electrode layer 32, and a fourth electrode layer 33. The third electrode layer 32 is disposed on the side of the second liquid crystal layer 31 close to the flat panel 1, and the third electrode layer 32 includes a plurality of third electrodes 321. The fourth electrode layer 33 is disposed on the side of the second liquid crystal layer 31 away from the flat panel 1, and the fourth electrode layer 33 is disposed in its entirety. The orthographic projection of the third electrode 321 on the first optical unit 2 is at least partially located in the overlapping area.

[0058] In some embodiments, the second liquid crystal layer 31 may be a nematic liquid crystal.

[0059] In some embodiments, the third electrode layer 32 and the fourth electrode layer 33 can be transparent conductive materials, which will not obstruct the display screen of the flat panel display panel 1. The third electrode layer 32 and the fourth electrode layer 33 can be any one of ITO (indium tin oxide), IZO (indium zinc oxide), IZTO (indium zinc tin oxide), IAZO (indium aluminum zinc oxide), IGZO (indium gallium zinc oxide), IGTO (indium gallium tin oxide), AZO (aluminum zinc oxide), ATO (antimony tin oxide), IGZTO (indium gallium zinc tin oxide), IGO (indium gallium oxide), InO (indium oxide), etc.

[0060] like Figure 3 As shown, the third electrode layer 32 includes a plurality of third electrodes 321, with adjacent third electrodes 321 spaced apart, that is, the third electrode layer 32 is a patterned electrode.

[0061] The fourth electrode layer 33 is an entire layer, meaning that the fourth electrode layer 33 can be a common electrode. By making the fourth electrode layer 33 an entire layer, the manufacturing process of the display device can be simplified.

[0062] In some embodiments, the second optical unit 3 further includes a third substrate 34 and a fourth substrate 35, which can be made of rigid or flexible materials. Rigid materials can be glass, quartz, or silicon wafers. Flexible materials can be one of polyimide (PI), polycarbonate (PC), polynorbornene (PNB), and polyethylene terephthalate (PET).

[0063] In some embodiments, such as Figure 3 As shown, the orthographic projection of the third electrode 321 onto the first optical unit 2 is at least partially located within the overlapping area, which means that the overlapping area of ​​the third electrode 321 and the first optical unit 2 overlaps in the thickness direction of the display device.

[0064] like Figure 3As shown, in the first display mode, the third electrode layer 32 and the fourth electrode layer 33 form an electric field. Under the action of the electric field, the second liquid crystal layer 31 forms a liquid crystal lens unit 301. The edge region of the liquid crystal lens unit 301 corresponds to two adjacent third electrodes 321, and the middle region of the liquid crystal lens unit 301 is located between the two adjacent third electrodes 321. By at least partially placing the orthographic projection of the third electrode 321 on the first optical unit 2 within the overlapping region, the edge region of the liquid crystal lens unit 301 can correspond to the overlapping region, thereby making the light-shielding part 201 correspond to the edge region of the liquid crystal lens unit 301, and the light-transmitting part 202 correspond to the middle region of the liquid crystal lens unit 301.

[0065] Optionally, such as Figure 3 As shown, the third electrode 321 corresponds one-to-one with the first electrode 221, and the third electrode 321 also corresponds one-to-one with the second electrode 231. This means that the number of third electrodes 321 is the same as the number of first electrodes 221, with one third electrode 321 corresponding to one first electrode 221. The number of third electrodes 321 is also the same as the number of second electrodes 231, with one third electrode 321 corresponding to one second electrode 231.

[0066] In some embodiments, the orthographic projection pattern of the third electrode 321 on the first optical unit 2 coincides with that of the first electrode 221, that is, the outer dimensions of the third electrode 321 are the same as those of the first electrode 221, and the third electrode 321 and the first electrode 221 are directly aligned.

[0067] In some embodiments, the orthographic projection pattern of the third electrode 321 on the first optical unit 2 coincides with that of the second electrode 231, that is, the outer dimensions of the third electrode 321 are the same as those of the second electrode 231, and the third electrode 321 and the second electrode 231 are directly aligned.

[0068] Optionally, such as Figure 3 As shown, in the first display mode, the third electrode layer 32 and the fourth electrode layer 33 form an electric field to drive the liquid crystal molecules in the second liquid crystal layer 31 to deflect and form a plurality of liquid crystal lens units 301; wherein, the edge region of the liquid crystal lens unit 301 overlaps with the third electrode 321 in the thickness direction of the display device, and the middle region of the liquid crystal lens unit 301 is offset from the third electrode 321 in the thickness direction of the display device.

[0069] like Figure 3 As shown, in the first display mode, the third electrode layer 32 and the fourth electrode layer 33 form an electric field, and the liquid crystal molecules in the second liquid crystal layer 31 form multiple liquid crystal lens units 301 under the action of the electric field.

[0070] In some embodiments, such as Figure 3As shown, two adjacent third electrodes 321 can correspond to the same liquid crystal lens unit 301. That is to say, two adjacent third electrodes 321 respectively correspond to two edge regions of the same liquid crystal lens unit 301, and the middle region of the liquid crystal lens unit 301 can correspond to the region between two adjacent third electrodes 321. With the above arrangement, the structure of the liquid crystal lens unit 301 can be simplified.

[0071] In some embodiments, such as Figure 3 As shown, the edge region of the liquid crystal lens unit 301 and the third electrode 321 are arranged overlapping in the thickness direction of the display device. That is to say, the edge region of the liquid crystal lens unit 301 and the third electrode 321 are correspondingly arranged. With the above arrangement, the edge region of the liquid crystal lens unit 301 can be aligned with the light-shielding part 201, so that the light-shielding part 201 can better block the light from the edge region of the liquid crystal lens unit 301 and reduce crosstalk.

[0072] In some embodiments, such as Figure 3 As shown, the middle region of the liquid crystal lens unit 301 is offset from the third electrode 321 in the thickness direction of the display device. That is to say, the middle region of the liquid crystal lens unit 301 corresponds to the region between two adjacent third electrodes 321. With the above arrangement, one liquid crystal lens unit 301 can correspond to two third electrodes 321, thereby simplifying the manufacturing process of the second optical unit 3.

[0073] In other embodiments, the central region of the liquid crystal lens unit 301 may correspond to at least one third electrode 321. That is, one liquid crystal lens unit 301 may correspond to at least three third electrodes 321, wherein the two outer third electrodes 321 correspond to the edge region of the liquid crystal lens unit 301, and the other third electrodes 321 correspond to the central region of the liquid crystal lens unit 301. By controlling one liquid crystal lens unit 301 with at least three third electrodes 321, the accuracy of the electric field can be improved, making the deflection angle of the liquid crystal molecules in the second liquid crystal layer 31 more accurate.

[0074] Optionally, such as Figure 5 As shown, the display device also has a second display mode, in which the optical rotation angle of the first liquid crystal layer 21 corresponding to the overlapping area is the same as that of the first liquid crystal layer 21 corresponding to the non-overlapping area.

[0075] The second display mode can be a flat display mode.

[0076] like Figure 5As shown, in the second display mode, the optical rotation angle of the first liquid crystal layer 21 corresponding to the overlapping area is the same as that of the first liquid crystal layer 21 corresponding to the non-overlapping area. This means that in both the overlapping and non-overlapping areas, the deflection angle of light after passing through the first liquid crystal layer 21 is the same. Through this setting, the transmittance of the first optical unit 2 is the same in both the overlapping and non-overlapping areas, allowing light from both areas to pass through without affecting the display of the flat panel display 1.

[0077] In some embodiments, the first liquid crystal layer 21 is a twisted nematic liquid crystal. In the second display mode, the optical rotation angle of the first liquid crystal layer 21 in the overlapping region and the optical rotation angle of the first liquid crystal layer 21 in the non-overlapping region are both 90 degrees.

[0078] Optionally, such as Figure 3 As shown, in the first display mode, the first electrode layer 22 and the second electrode layer 23 form an electric field, and the third electrode layer 32 and the fourth electrode layer 33 also form an electric field. Figure 5 As shown, in the second display mode, the first electrode layer 22 and the second electrode layer 23 do not form an electric field, and the third electrode layer 32 and the fourth electrode layer 33 do not form an electric field.

[0079] In some embodiments, the first display mode is a stereoscopic display mode. In the first display mode, the first electrode layer 22 and the second electrode layer 23 form an electric field to drive the liquid crystal molecules in the first liquid crystal layer 21 to deflect.

[0080] Specifically, such as Figure 3 As shown, the first liquid crystal layer 21 is a twisted nematic liquid crystal. The optical rotation angle of the first liquid crystal layer 21 in the overlapping region is 0 to 45 degrees, and the optical rotation angle of the first liquid crystal layer 21 in the non-overlapping region is 90 degrees. Through the above arrangement, the light transmittance of the overlapping region can be made lower than that of the non-overlapping region, thereby forming a light-shielding part 201 in the overlapping region and a light-transmitting part 202 in the non-overlapping region.

[0081] In the first display mode, the third electrode layer 32 and the fourth electrode layer 33 form an electric field to drive the liquid crystal molecules in the second liquid crystal layer 31 to deflect.

[0082] Specifically, such as Figure 3 As shown, after the liquid crystal molecules in the second liquid crystal layer 31 are deflected, they form a plurality of liquid crystal lens units 301. The middle region of the liquid crystal lens unit 301 corresponds to the light-transmitting part 202, and the edge region of the liquid crystal lens unit 301 corresponds to the light-shielding part 201, thereby blocking the light from the edge region of the liquid crystal lens unit 301 and reducing crosstalk.

[0083] In some embodiments, such as Figure 5As shown, the second display mode is a planar display mode. In the second display mode, the first electrode layer 22 and the second electrode layer 23 do not form an electric field, and the third electrode layer 32 and the fourth electrode layer 33 do not form an electric field.

[0084] Specifically, the first liquid crystal layer 21 is a twisted nematic liquid crystal, and its optical rotation angle is 90° when no external electric field is applied. Through this configuration, the transmittance of the overlapping area is the same as that of the non-overlapping area, allowing light from both areas to pass through without affecting the planar display. Because the transmittance of the overlapping area is the same as that of the non-overlapping area, light blocking by the overlapping area is avoided, thus preserving the planar display effect. In some embodiments, such as Figure 5 As shown, the second liquid crystal layer 31 is a nematic liquid crystal. The second liquid crystal layer 31 does not form a liquid crystal lens unit 301. Light can pass through the second liquid crystal layer 31, so as not to affect the flat panel display.

[0085] Optionally, such as Figure 1 and Figure 2 As shown, the flat panel display 1 includes a plurality of sub-pixels 10, each sub-pixel 10 including a light-emitting area 10a and a non-light-emitting area 10b located between two adjacent light-emitting areas 10a; wherein, the orthographic projection of the light-shielding part 201 on the flat panel display 1 is at least partially located within the non-light-emitting area 10b.

[0086] The luminous area 10a can emit light, while the non-luminous area 10b cannot. The luminous area 10a is the effective display area AA in sub-pixel 10, and the non-luminous area 10b can be used to set up pixel driving circuits, data lines, scan lines, etc.

[0087] In some embodiments, such as Figure 2 As shown, when the flat panel display panel 1 is an LCD panel, the flat panel display panel 1 includes a color filter layer 141, which includes color resist blocks and a black matrix located between the color resist blocks. The black matrix can block light. The non-light-emitting area 10b can correspond to the black matrix.

[0088] When the flat panel display panel 1 is an OLED panel, the flat panel display panel 1 includes a stacked anode, a light-emitting material layer, and a cathode. The light-emitting area 10a can be the area in the light-emitting material layer that is in contact with the anode. The non-light-emitting area 10b is the area in the display area AA other than the light-emitting area 10a.

[0089] In some embodiments, the orthographic projection of the light-shielding portion 201 onto the flat panel 1 is at least partially located within the non-light-emitting area 10b. That is to say, the light-shielding portion 201 and the non-light-emitting area 10b overlap in the thickness direction of the display device. With the above arrangement, the light-shielding portion 201 can be prevented from excessively blocking the light-emitting area 10a, thus affecting the display brightness of the display device.

[0090] Optionally, such as Figure 3 As shown, in the arrangement direction of the light-shielding portions 201, the width W1 of the light-shielding portion 201 is smaller than the width W2 of the light-transmitting portion 202. This arrangement reduces the width W1 of the light-shielding portion 201. In the first display mode, this prevents the light-shielding portion 201 from excessively blocking light, thus avoiding impact on the brightness of the stereoscopic display.

[0091] In some embodiments, the display device may be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0092] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0093] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0094] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0095] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display device, characterized by comprising: The display device comprises: a flat display panel; a first optical unit arranged on a light exit side of the flat display panel; a second optical unit arranged on a side of the first optical unit away from the flat display panel; wherein the display device has a first display mode, the first optical unit forms light-blocking portions and light-transmitting portions in the first display mode, the second optical unit forms a plurality of liquid crystal lens units in the first display mode, the light-blocking portions have a light transmittance smaller than that of the light-transmitting portions, an edge region of the liquid crystal lens units is arranged to overlap the light-blocking portions in a thickness direction of the display device, and a middle region of the liquid crystal lens units is arranged to overlap the light-transmitting portions in the thickness direction of the display device.

2. The display device according to claim 1, wherein The first optical unit comprises: a first liquid crystal layer; a first electrode layer arranged on a side of the first liquid crystal layer close to the flat display panel, the first electrode layer comprising a plurality of first electrodes; a second electrode layer arranged on a side of the first liquid crystal layer away from the flat display panel, the second electrode layer comprising a plurality of second electrodes; wherein the first electrodes and the second electrodes overlap in the thickness direction of the display device and form overlapping regions, and the first optical unit further comprises non-overlapping regions between adjacent two overlapping regions; in the first display mode, the overlapping regions correspond to form the light-blocking portions, and the non-overlapping regions correspond to form the light-transmitting portions.

3. The display device according to claim 2, wherein In the first display mode, the first electrode layer and the second electrode layer form an electric field to drive liquid crystal molecules in the first liquid crystal layer to deflect, and an optical rotation angle of the first liquid crystal layer corresponding to the overlapping regions is smaller than an optical rotation angle of the first liquid crystal layer corresponding to the non-overlapping regions.

4. The display device according to claim 2, wherein The second optical unit comprises: a second liquid crystal layer; a third electrode layer arranged on a side of the second liquid crystal layer close to the flat display panel, the third electrode layer comprising a plurality of third electrodes; a fourth electrode layer arranged on a side of the second liquid crystal layer away from the flat display panel, the fourth electrode layer being arranged as a whole layer; wherein a projection of the third electrodes on the first optical unit is at least partially located in the overlapping regions.

5. The display device according to claim 4, wherein The third electrodes correspond one-to-one to the first electrodes, and the third electrodes correspond one-to-one to the second electrodes.

6. The display device according to claim 4, wherein In the first display mode, the third electrode layer and the fourth electrode layer form an electric field to drive liquid crystal molecules in the second liquid crystal layer to deflect to form a plurality of liquid crystal lens units; wherein an edge region of the liquid crystal lens units is arranged to overlap the third electrodes in the thickness direction of the display device, and a middle region of the liquid crystal lens units is arranged to be staggered with the third electrodes in the thickness direction of the display device.

7. The display device according to claim 4, wherein The display device further has a second display mode, in which the optical rotation angle of the first liquid crystal layer corresponding to the overlapping regions and the optical rotation angle of the first liquid crystal layer corresponding to the non-overlapping regions are the same.

8. The display device according to claim 7, wherein In the first display mode, the first electrode layer and the second electrode layer form an electric field, and the third electrode layer and the fourth electrode layer form an electric field; in the second display mode, the first electrode layer and the second electrode layer do not form an electric field, and the third electrode layer and the fourth electrode layer do not form an electric field.

9. The display device according to claim 1, wherein The planar display panel comprises a plurality of sub-pixels, each of the sub-pixels comprising a light-emitting region and a non-light-emitting region between two adjacent light-emitting regions. The normal projection of the light-shielding part on the planar display panel is at least partially located in the non-light-emitting region.

10. The display device according to any one of claims 1 to 9, characterized by In the arrangement direction of the light-shielding part, the width of the light-shielding part is smaller than the width of the light-transmitting part.

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