Naked eye 3D display device and preparation method thereof

Abstract

The embodiment of the invention provides a naked-eye 3D display device and a preparation method thereof, and belongs to the technical field of display. The naked-eye 3D display device comprises a display screen and a grating structure arranged on one side of the display screen; the grating structure comprises a first grating panel and a second grating panel which are oppositely arranged, the first grating panel comprises a first substrate and a first light-transmitting structure arranged on the first substrate, and the second grating panel comprises a second substrate and a second light-transmitting structure arranged on the second substrate; wherein the first substrate is connected with a substrate of the display screen, the first light-transmitting structure is connected with the second light-transmitting structure, and the second substrate is located on the side, away from the first light-transmitting structure, of the second light-transmitting structure; the first grating panel and the second grating panel are symmetrically arranged about the connection center line. According to the naked-eye 3D display device and the preparation method thereof provided by the embodiment of the invention, the problem of reducing 3D ghosting can be solved, and the watching experience of a user is improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technology, and in particular, to a naked-eye 3D display device and a method for manufacturing the same. Background Art

[0002] Naked eye 3D technology is mainly divided into two categories: reproducing binocular parallax and original light field. The principle of reproducing binocular parallax is to make the left and right eyes receive two views with parallax respectively, and the two views are synthesized in the brain to produce a 3D effect. Therefore, by doing some processing on the screen, the images with parallax are mapped to the left and right eyes of the person respectively, and a 3D image can be produced.

[0003] Electronic grating is one of the technical solutions for reproducing binocular parallax naked-eye 3D. This technical solution uses a display panel with an electronic liquid crystal grating box. Currently, most electronic liquid crystal grating boxes use double-layer metal strips that are alternately distributed. The electric field generated between the double-layer metal strips and the upper control metal layer drives the liquid crystal deflection to control the light transmission or opacity of different areas, so that the left and right eyes can receive different views respectively.

[0004] However, naked-eye 3D display devices using electronic gratings have a 3D ghosting problem, resulting in a poor viewing experience for users. Summary of the invention

[0005] The embodiments of the present application provide a naked-eye 3D display device and a method for manufacturing the same, aiming to reduce the problem of 3D ghosting and improve the viewing experience of users.

[0006] A first aspect of an embodiment of the present application provides a naked-eye 3D display device, comprising:

[0007] A display screen and a grating structure arranged on one side of the display screen;

[0008] The grating structure comprises a first grating panel and a second grating panel arranged opposite to each other, the first grating panel comprises a first substrate and a first light-transmitting structure arranged on the first substrate, and the second grating panel comprises a second substrate and a second light-transmitting structure arranged on the second substrate;

[0009] Wherein, the first substrate is connected to the substrate of the display screen, the first light-transmitting structure is connected to the second light-transmitting structure, and the second substrate is located on a side of the second light-transmitting structure away from the first light-transmitting structure;

[0010] The first grating panel and the second grating panel are symmetrically arranged about a connection center line.

[0011] Optionally, the first grating panel includes a first grid, the second grating panel includes a second grid, and the first grid and the second grid are connected via a connecting layer;

[0012] The display device further includes a grating flexible circuit board, and the grating flexible circuit board is connected to the first gate or the second gate.

[0013] Optionally, the material of the connection layer includes silver paste.

[0014] Optionally, the display device includes a first polarizer, a second polarizer, a third polarizer and a fourth polarizer;

[0015] Among them, the first polarizer is arranged on the light emitting side of the display screen, the second polarizer is arranged between the display screen and the first grating panel, the third polarizer is arranged between the first grating panel and the second grating panel, and the fourth polarizer is arranged on the side of the second grating panel away from the first grating panel.

[0016] Optionally, the first light-transmitting structure and the second light-transmitting structure are connected via the third polarizer.

[0017] Optionally, the first light-transmitting structure includes a first metal layer, a second metal layer, a first liquid crystal layer and a first driving layer which are stacked, and the first metal layer is arranged close to the first substrate;

[0018] The first metal layer includes a plurality of first metal strips, the second metal layer includes a plurality of second metal strips, and the first metal strips and the second metal strips are alternately distributed on the first substrate.

[0019] Optionally, the second light-transmitting structure includes a third metal layer, a fourth metal layer, a second liquid crystal layer and a second driving layer which are stacked, and the third metal layer is arranged close to the second substrate;

[0020] The third metal layer includes a plurality of third metal strips, the fourth metal layer includes a plurality of fourth metal strips, and the third metal strips and the fourth metal strips are alternately distributed on the second substrate.

[0021] Optionally, the actual placement height between the first grating panel, the second grating panel and the display screen is:

[0022]

[0023] Wherein, S is the optimal viewing distance value of the viewer, P is the pixel value of the display screen, L is the pupil distance value of the human eye, and n is the refractive index of the display device.

[0024] Optionally, the display device further includes:

[0025] The eye tracking device is arranged on the light emitting side of the display screen, and is used to obtain the current eye position information of the viewer in front of the display screen in real time.

[0026] A second aspect of an embodiment of the present application provides a method for preparing a naked-eye 3D device, the method comprising:

[0027] Providing a first grating panel and a second grating panel, wherein the first grating panel comprises a first substrate and a first light-transmitting structure disposed on the first substrate, and the second grating panel comprises a second substrate and a second light-transmitting structure disposed on the second substrate;

[0028] Connecting the first grating panel to the second grating panel, wherein the first grating panel and the second grating panel are symmetrically arranged about a connection center line;

[0029] A display screen is provided, and the display screen is connected to the first grating panel, wherein the first substrate is connected to a substrate of the display screen.

[0030] Beneficial effects:

[0031] The present application provides a naked-eye 3D display device and a preparation method thereof, wherein a grating structure is arranged on one side of a display screen, and the grating structure includes a first grating panel and a second grating panel, wherein a first light-transmitting structure of the first grating panel is connected to a second light-transmitting structure of the second grating panel, and the first grating panel and the second grating panel are symmetrically arranged about a connection center line; in this way, the brightness of the zero-level grayscale can be reduced by using two superimposed gratings, thereby improving the ghosting problem that occurs in the naked-eye 3D display device, and further enhancing the user's viewing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 is a structural schematic diagram of a naked-eye 3D display device proposed in one embodiment of the present application;

[0034] Figure 2 This is a schematic diagram of the shading working principle of a double grating panel in a naked-eye 3D display device proposed in one embodiment of the present application;

[0035] Figure 3This is a schematic diagram of an optical path design of a naked-eye 3D display device proposed in one embodiment of the present application;

[0036] Figure 4 This is a schematic diagram of light transmission of a first grating panel and a second grating panel in a naked-eye 3D display device in a TN mode proposed in an embodiment of the present application;

[0037] Figure 5 is a schematic diagram of light transmission of a first grating panel and a second grating panel in an ADS mode in a naked-eye 3D display device proposed in an embodiment of the present application;

[0038] Figure 6 This is a schematic diagram of light transmission of a first grating panel and a second grating panel in an IPS mode in a naked-eye 3D display device proposed in an embodiment of the present application;

[0039] Figure 7 This is a schematic diagram of light transmission of a first grating panel and a second grating panel in a naked-eye 3D display device in a VA mode proposed in an embodiment of the present application;

[0040] Figure 8 is a flowchart of a method for preparing a naked-eye 3D display device according to an embodiment of the present application;

[0041] Fig. 9 This is a schematic diagram of a naked-eye 3D display device according to an embodiment of the present application that completes a partial structure of a first grating panel or a partial structure of a second grating panel;

[0042] Fig.10 This is a schematic diagram of a naked-eye 3D display device proposed in one embodiment of the present application that completes a first grating panel color film substrate;

[0043] Fig.11 This is a schematic diagram of a naked-eye 3D display device according to an embodiment of the present application completing the first grating panel alignment;

[0044] Fig.12 This is a schematic diagram of a naked-eye 3D display device proposed in an embodiment of the present application after the first grating panel is assembled and the glass substrate is removed;

[0045] Fig.13 It is a schematic diagram of a naked-eye 3D display device proposed in one embodiment of the present application, in which a second grating panel color film substrate is completed;

[0046] Fig.14 This is a structural schematic diagram of a naked-eye 3D display device proposed in an embodiment of the present application, in which a first grating panel and a second grating panel are assembled into a box;

[0047] Fig.15This is a schematic diagram of a naked-eye 3D display device proposed in an embodiment of the present application, in which a first gate and a second gate are connected;

[0048] Fig.16 is a schematic diagram of a top view of a first grating panel and a second grating panel of a naked-eye 3D display device proposed in one embodiment of the present application;

[0049] Fig.17 This is a schematic diagram of a first grating panel and a second grating panel of a naked-eye 3D display device proposed in an embodiment of the present application adopting bilateral driving;

[0050] Fig.18 This is a schematic diagram of a first grating panel and a second grating panel of a naked-eye 3D display device proposed in an embodiment of the present application being driven by a single side;

[0051] Fig.19 1 is a schematic diagram of a top view structure of a naked-eye 3D display device proposed in an embodiment of the present application, in which a first grating panel driven by bilaterals and a second grating panel are bonded together;

[0052] Fig. 20 This is a schematic diagram of the top view structure of a naked-eye 3D display device proposed in one embodiment of the present application, which adopts a first grating panel driven on one side and a second grating panel bonded together.

[0053] Description of reference numerals: 10, display screen; 20, first grating panel; 201, first substrate; 202, first gate insulating layer; 203, first gate; 204, first metal layer; 205, first passivation layer; 206, second metal layer; 207, first flat layer; 208, first liquid crystal layer; 209, second flat layer; 210, first driving layer; 211, first supporting layer; 212, first middle frame glue layer; 30, second grating panel; 301, second substrate; 302, second gate insulating layer; 303, second gate ; 304, third metal layer; 305, second passivation layer; 306, fourth metal layer; 307, third flat layer; 308, second liquid crystal layer; 309, fourth flat layer; 310, second drive layer; 311, second support layer; 312, second middle frame glue layer; 401, first polarizer; 402, second polarizer; 403, third polarizer; 404, fourth polarizer; 50, connecting layer; 60, grating flexible circuit board; 70, optical glue layer; 801, glass substrate; 802, high temperature foaming glue or low temperature viscosity reducing glue. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] In the related art, when a user uses a naked-eye 3D display device to watch, the naked-eye 3D display device controls the light transmittance and opacity of different positions through a grating panel, so that the user's left and right eyes can only see the left and right views with a certain parallax, that is, the user's left eye can only see the blue view, and the right eye can only see the red view, thereby generating 3D vision. However, if the opaque black strips of the grating panel are not black enough and there is light leakage, the user's right eye will see a blue view of a certain brightness in addition to the red view, thereby causing a ghosting problem.

[0056] In order to solve the ghosting problem, the inventors first conducted an optical test on the grating panel. The test content was the zero-level grayscale brightness data of the grating panel at a horizontal angle of -45° to 45°. After the test, the inventors found that as the viewing angle increased, the zero-level grayscale brightness increased sharply, indicating that light actually passed through the opaque part of the grating panel, causing the left eye to see a red view of a certain brightness and the right eye to see a blue view of a certain brightness, thereby causing the ghosting problem; however, after the inventors improved the horizontal viewing angle and full viewing angle of the grating panel, it was found that the ghosting phenomenon at the side viewing angle was improved, but the ghosting phenomenon still existed regardless of the front or side viewing angle.

[0057] Therefore, the inventors reduced the backlight brightness until the ghosting phenomenon was completely invisible to the human eye, and after experiments, the inventors found that when the zero-level grayscale of the grating panel was reduced to 0.15 nits, the ghosting phenomenon would be completely invisible. However, because the display area of ​​the grating panel only has a high-transmittance film layer and no low-transmittance film layer, the zero-level grayscale brightness cannot be only 0.15 nits. Even the zero-level grayscale brightness of existing conventional LCD display products cannot reach 0.15 nits, so it is no longer possible to completely solve the ghosting problem by reducing the zero-level grayscale brightness of the grating panel.

[0058] In view of this, an embodiment of the present application proposes a naked-eye 3D display device and a preparation method thereof, wherein a grating structure is arranged on one side of a display screen, and the grating structure includes a first grating panel and a second grating panel, wherein a first light-transmitting structure of the first grating panel is connected to a second light-transmitting structure of the second grating panel, and the first grating panel and the second grating panel are symmetrically arranged about a connection center line; in this way, the brightness of the zero-level grayscale can be reduced by using two superimposed gratings, thereby improving the ghosting problem that occurs in the naked-eye 3D display device, and further enhancing the user's viewing experience.

[0059] Reference Figure 1 As shown, a naked-eye 3D display device disclosed in an embodiment of the present application includes a display screen 10 and a grating structure arranged on one side of the display screen 10 .

[0060] Specifically, the display screen 10 may be a conventional 2D display device, and the display screen 10 may include a substrate, a light-emitting layer, a filter layer, etc. stacked in sequence, wherein the substrate may be a TFT (Thin Film Transistor) substrate, and the light-emitting layer may include a stacked anode, an electron transport layer, a light-emitting material layer, a hole injection layer, a hole transport layer, a cathode, etc. The display screen 10 may emit light from, thereby realizing the display of an image.

[0061] Reference Figure 1 As shown, the grating structure includes a first grating panel 20 and a second grating panel 30. The structures of the first grating panel 20 and the second grating panel 30 are completely the same, so the first grating panel 20 and the second grating panel 30 can be manufactured at the same time. In the embodiment of the present application, the first grating panel 20 and the second grating panel 30 are arranged relative to each other.

[0062] Specifically, the first grating panel 20 includes a first substrate 201 and a first light-transmitting structure arranged on the first substrate 201, and the second grating panel 30 includes a second substrate 301 and a second light-transmitting structure arranged on the second substrate 301. The first grating panel 20 and the second grating panel 30 are arranged relative to each other, which means that the first light-transmitting structure of the first grating panel 20 is connected to the second light-transmitting structure of the second grating panel 30; at the same time, the first substrate 201 is connected to the substrate of the display screen 10, and the second substrate 301 is located on the side of the second light-transmitting structure away from the first light-transmitting structure. In addition, the first grating panel 20 and the second grating panel 30 are symmetrically arranged about a connection center line. Wherein, the connection center line refers to the center straight line at the connection point between the first grating panel 20 and the second grating panel 30.

[0063] Furthermore, the first substrate 201 and the second substrate 301 may be TFT substrates. Before forming the first light-transmitting structure, a first gate 203 and a first gate insulating layer 202 may be formed on the first substrate 201. Similarly, a second gate 303 and a second gate insulating layer 302 are provided between the second substrate 301 and the second light-transmitting structure.

[0064] Reference Figure 1 As shown, the first light-transmitting structure includes a first metal layer 204 , a second metal layer 206 , a first liquid crystal layer 208 and a first driving layer 210 which are stacked.

[0065] Specifically, the first metal layer 204 is disposed on a side of the first gate insulating layer 202 away from the first substrate 201, and the first metal layer 204 includes a plurality of first metal strips, which are evenly spaced and arranged on the first substrate 201. The second metal layer 206 is disposed on a side of the first metal layer 204 away from the first substrate 201, and before forming the second metal layer 206, a first passivation layer 205 is first formed on the first metal layer 204 to insulate the first metal layer 204 from the second metal layer 206.

[0066] The second metal layer 206 includes a plurality of second metal strips, which are evenly spaced and arranged on the first substrate 201, and the first metal strips and the second metal strips are alternately distributed on the first substrate 201. It can also be understood that the orthographic projection of the second metal strip on the first substrate 201 is located between the orthographic projections of two adjacent first metal strips on the first substrate 201. It should be noted that in actual products, the orthographic projection of the second metal strip and the orthographic projection of the first metal strip may partially overlap.

[0067] Subsequently, a first flat layer 207 is formed on the second metal layer 206, and at the same time, first sealant layers 212 are formed on both sides of the first flat layer 207, thereby forming a containing space between the first flat layer 207 and the first sealant layers 212 on both sides, and a liquid crystal material is injected into the containing space to form a first liquid crystal layer 208, and then a second flat layer 209 is formed on the side of the first liquid crystal layer 208 away from the first substrate 201. A first support layer 211 can also be formed between the first flat layer 207 and the second flat layer 209, and the first support layer 211 can support the second flat layer 209 on the upper layer.

[0068] The first driving layer 210 is formed on the side of the second flat layer 209 away from the first substrate 201. The first driving layer 210 can generate an electric field with the first metal layer 204 or the second metal layer 206, so that the liquid crystal material contained in the first liquid crystal layer 208 is deflected, thereby achieving the purpose of light transmission or opacity in different areas.

[0069] In the embodiment of the present application, the materials of the first metal layer 204, the second metal layer 206 and the first driving layer 210 are all ITO (indium tin oxide); the first gate insulating layer 202 can be made of inorganic materials, such as SiNx, etc.; the first passivation layer 205 can be made of inorganic materials, such as SiNx, or organic materials, such as PI (polyimide); the first planarizing layer 207 and the second planarizing layer 209 can be made of organic materials, such as PI.

[0070] Reference Figure 1As shown, the second light-transmitting structure includes a third metal layer 304 , a fourth metal layer 306 , a second liquid crystal layer 308 and a second driving layer 310 which are stacked.

[0071] Specifically, the third metal layer 304 is disposed on a side of the second gate insulating layer 302 away from the second substrate 301, and the third metal layer 304 includes a plurality of third metal strips, and the plurality of third metal strips are evenly spaced and arranged on the second substrate 301. The fourth metal layer 306 is disposed on a side of the third metal layer 304 away from the second substrate 301, and before forming the fourth metal layer 306, a second passivation layer 305 is first formed on the third metal layer 304 to insulate the third metal layer 304 from the fourth metal layer 306.

[0072] The fourth metal layer 306 includes a plurality of fourth metal strips, which are evenly spaced and arranged on the second substrate 301, and the third metal strips and the fourth metal strips are alternately distributed on the second substrate 301. It can also be understood that the orthographic projection of the third metal strip on the second substrate 301 is located between the orthographic projections of two adjacent fourth metal strips on the second substrate 301. It should be noted that in actual products, the orthographic projection of the third metal strip and the orthographic projection of the fourth metal strip may partially overlap.

[0073] Subsequently, a third flat layer 307 is formed on the side of the fourth metal layer 306 away from the second substrate 301, and second frame-sealing adhesive layers 312 are formed on both sides of the third flat layer 307, thereby forming a receiving space between the third flat layer 307 and the second frame-sealing adhesive layers 312 on both sides, and a liquid crystal material is injected into the receiving space to form a second liquid crystal layer 308, and then a fourth flat layer 309 is formed on the side of the second liquid crystal layer 308 away from the second substrate 301. A second supporting layer 311 can also be formed between the third flat layer 307 and the fourth flat layer 309, and the second supporting layer 311 can support the fourth flat layer 309 on the upper layer.

[0074] The second driving layer 310 is formed on the side of the fourth flat layer 309 away from the second substrate 301. The second driving layer 310 can generate an electric field with the third metal layer 304 or the fourth metal layer 306, so that the liquid crystal material contained in the second liquid crystal layer 308 is deflected, thereby achieving the purpose of light transmission or opacity in different areas.

[0075] In the embodiment of the present application, the materials of the third metal layer 304, the fourth metal layer 306 and the second driving layer 310 are all ITO (indium tin oxide); the second gate insulating layer 302 can be made of inorganic materials, such as SiNx, etc.; the second passivation layer 305 can be made of inorganic materials, such as SiNx, or organic materials, such as PI (polyimide); the third planar layer 307 and the fourth planar layer 309 can be made of organic materials, such as PI.

[0076] After experiments, when the first grating panel 20 and the second grating panel 30 both display a zero-level grayscale image, the image displayed on the display screen 10 is completely invisible, and after actual measurement, the zero-level grayscale brightness of the first grating panel 20 and the second grating panel 30 superimposed together is 0.016 nits, which fully meets the requirement that the zero-level grayscale brightness is lower than 0.15 nits. Therefore, the stacked first grating panel 20 and the second grating panel 30 can better solve the ghosting problem.

[0077] By using the naked-eye 3D display device provided in the embodiment of the present application, the stacked first grating panel 20 and the second grating panel 30 can significantly reduce the zero-level grayscale brightness of the display device, thereby reducing the ghosting problem that occurs when the human eye views, thereby improving the user's viewing experience.

[0078] In practical applications, the naked-eye 3D display device further includes a grating flexible circuit board 60 , which is connected to a driving chip of the display device, so that the driving chip can drive the light transmission effects of the first grating panel 20 and the second grating panel 30 respectively through the grating flexible circuit board 60 .

[0079] However, in the embodiment of the present application, the display device includes two grating panels, and therefore requires two grating flexible circuit boards for driving, which makes the structure of the entire display device more complicated.

[0080] To this end, in an optional implementation, the embodiment of the present application also provides a naked-eye 3D display device, in which a connecting layer 50 is arranged between the first gate 203 of the first grating panel 20 and the second gate 303 of the second grating panel 30, and the first gate 203 and the second gate 303 are electrically connected through the connecting layer 50.

[0081] Specifically, after the connection layer 50 is connected to the first gate 203 and the second gate 303, only one grating flexible circuit board 60 can be set in the display device, and the grating flexible circuit board 60 can be connected to the first gate 203 or the second gate 303. In this way, the first grating panel 20 and the second grating panel 30 can be driven by the same grating flexible circuit board 60. Compared with the separate driving of the two gratings, this embodiment can make the overall structure of the display device simpler, thereby reducing the preparation cost of the display device.

[0082] Furthermore, in the embodiment of the present application, the material of the connection layer 50 may be silver paste. Silver paste is a viscous paste composed of a mechanical mixture of high-purity (99.9%) metallic silver particles, adhesives, solvents, and additives, and has a strong conductive ability, which can ensure the simultaneous driving of the first grating panel 20 and the second grating panel 30. In other embodiments, other conductive materials may also be selected.

[0083] In an optional implementation, the embodiment of the present application further provides a naked-eye 3D display device, which further includes a first polarizer 401 , a second polarizer 402 , a third polarizer 403 and a fourth polarizer 404 .

[0084] Specifically, the first polarizer 401 is disposed on the light-emitting side of the display screen 10, the second polarizer 402 is disposed between the display screen 10 and the first grating panel 20, the third polarizer 403 is disposed between the first grating panel 20 and the second grating panel 30, and the fourth polarizer 404 is disposed on a side of the second grating panel 30 away from the first grating panel 20. The second polarizer 402 and the first substrate 201 may be connected by an optical adhesive layer 70.

[0085] The first polarizer 401 , the second polarizer 402 , the third polarizer 403 and the fourth polarizer 404 can improve the luminous effect of the entire display device.

[0086] Furthermore, in the embodiment of the present application, the first light-transmitting structure and the second light-transmitting structure are connected via a third polarizer 403 .

[0087] Specifically, the third polarizer 403 is used as a common color film substrate for the first grating panel 20 and the second grating panel 30, so that the first grating panel 20 and the second grating panel 30 are manufactured together, so that the first grating panel 20 and the second grating panel 30 can share a placement height, thereby greatly reducing the module thickness and weight of the conventional dual grating panel design and improving the product competitiveness.

[0088] In practical applications, it is necessary to calculate the actual placement heights and grating intervals of the first grating panel 20 and the second grating panel 30 accordingly, so that the first grating panel 20 and the second grating panel 30 can match each other.

[0089] Figure 2 The working mode of the double grating in the naked eye 3D display device is shown, and Figure 3 The schematic diagram of the optical path of the naked-eye 3D display device between the light output and the human eye position is shown when the human eye is at the optimal viewing distance S. Referring to the figure and the figure, in the embodiment of the present application, since the distance between the liquid crystal light control areas of the first grating panel 20 and the second grating panel 30 is very close, the distance from the center of the third polarizer between the first grating panel 20 and the second grating panel 30 to the liquid crystal layer of the display screen 10 can be used as the placement height H, and the optimal viewing distance when the user uses the display device is S, the user's human eye pupil distance is L, the pixel size of the display screen 10 is P, the grating spacing of the first grating panel 20 and the second grating panel 30 is C, the virtual placement height of the first grating panel 20 and the second grating panel 30 without considering the refractive index is h, and the refractive index of the naked-eye 3D display device is n.

[0090] Through the similar triangle relationship of the four parameters of human eye pupil distance L, optimal viewing distance S, placement height H, and grating spacing C, the size of placement height H and grating spacing C can be calculated, as shown in the following formula:

[0091]

[0092]

[0093]

[0094] In the embodiment of the present application, the first grating panel 20 and the second grating panel 30 include four execution modes in total. The four execution modes of the first grating panel 20 and the second grating panel 30 will be introduced one by one below.

[0095] Reference Figure 4As shown, the first execution mode is the TN mode. In this mode, the actual placement height of the first grating panel 20 and the second grating panel 30 is first calculated according to the calculation formula described above. The actual placement height is the sum of the thickness of the substrate of the display screen 10, the thickness of the second polarizer, the thickness of the optical adhesive layer, the thickness of the first substrate 201 and the general thickness of the third polarizer. At the same time, the grating spacing of the first grating panel 20 and the second grating panel 30 is calculated. The grating spacing can be regarded as the pixel size of the first grating panel 20 and the second grating panel 30. m metal strips (including the first metal strip and the second metal strip, or including the third metal strip and the fourth metal strip) are arranged within a grating spacing. When the 3D display mode is turned on, m / 2 of the metal strips give Vcom signals, and these metal strips are transparent, and the other m / 2 of the metal strips give Vtop signals, and these metal strips are not transparent. In this way, the partial light transmission effect of the first grating panel 20 and the second grating panel 30 is achieved.

[0096] Reference Figure 5 As shown, the second execution mode is the ADS mode, in which the actual placement height and grating spacing of the first grating panel 20 and the second grating panel 30 can also be calculated according to the calculation formula described above, and the translucent and opaque electrical signals of the first grating panel 20 and the second grating panel 30 of this mode are shown in the figure, wherein m / 2 metal strips give Vcom signals, and this part of the metal strips is opaque, and the other m / 2 metal strips give Vtop signals, and this part of the metal strips is translucent, thereby achieving a partial light-transmitting effect of the first grating panel 20 and the second grating panel 30.

[0097] Reference Figure 6 As shown, the third execution mode is the IPS mode, in which the actual placement height and grating spacing of the first grating panel 20 and the second grating panel 30 can also be calculated according to the calculation formula described above, and the light-transmitting and light-impermeable electrical signals of the first grating panel 20 and the second grating panel 30 of this mode are shown in the figure, wherein m / 2 metal strips give Vcom signals, and these metal strips are light-impermeable, and the other m / 2 metal strips give Vcom signals and Vtop signals respectively at adjacent intervals, so that there is a pressure difference between adjacent metal strips, forming an electric field, thereby making these metal strips light-transmitting, thereby achieving a partial light-transmitting effect of the first grating panel 20 and the second grating panel 30.

[0098] Reference Figure 7As shown, the fourth execution mode is the VA mode, in which the actual placement height and grating spacing of the first grating panel 20 and the second grating panel 30 can also be calculated according to the calculation formula described above, and the light-transmitting and light-impermeable electrical signals of the first grating panel 20 and the second grating panel 30 of this mode are shown in the figure, wherein m / 2 metal strips give Vcom signals, and this part of the metal strips is light-impermeable, and the other m / 2 metal strips give Vtop signals, and this part of the metal strips is light-transmitting, thereby achieving a partial light-transmitting effect of the first grating panel 20 and the second grating panel 30.

[0099] With the naked-eye 3D display device provided by the embodiment of the present application, in different execution modes, the first grating panel 20 and the second grating panel 30 can both achieve a partial light-transmitting effect, so that the first grating panel 20 and the second grating panel 30 can achieve a 3D display effect of the display device.

[0100] In an optional implementation, the embodiment of the present application further provides a naked-eye 3D display device, which also includes a human eye tracking device.

[0101] Specifically, the eye tracking device is arranged on the light emitting side of the display screen 10, that is, the side of the display screen 10 away from the grating structure. The eye tracking device is connected to the control chip of the display device. The eye tracking device can obtain the current position information of the viewer's eyes in front of the display screen 10 in real time, and send the position information to the control chip. The control chip then dynamically adjusts the 3D display according to the position information, thereby achieving the effect of viewing 3D with a wide viewing angle.

[0102] In practical applications, the eye tracking device may be a camera.

[0103] Figure 8 A schematic diagram of the steps of preparing a naked-eye 3D display device is shown. Figure 8 As shown, the embodiment of the present application also provides a method for preparing a naked-eye 3D display device, the preparation method comprising:

[0104] Step 301 : providing a first grating panel 20 and a second grating panel 30 , wherein the first grating panel 20 comprises a first substrate 201 and a first light-transmitting structure disposed on the first substrate 201 , and the second grating panel 30 comprises a second substrate 301 and a second light-transmitting structure disposed on the second substrate 301 .

[0105] Specifically, the first substrate 201 may be a TFT substrate, and a first gate electrode 203 and a first gate insulating layer 202 may be sequentially formed between the first substrate 201 and the first light-transmitting structure. The first light-transmitting structure includes a first metal layer 204, a second metal layer 206, a first liquid crystal layer 208, and a first driving layer 210 that are stacked. Meanwhile, a first passivation layer 205 is disposed between the first metal layer 204 and the second metal layer 206, a first planarization layer 207 is disposed between the second metal layer 206 and the first liquid crystal layer 208, and a second planarization layer 209 and a first supporting layer 211 are disposed between the first driving layer 210 and the first liquid crystal layer 208.

[0106] The second substrate 301 may be a TFT substrate, and a second gate 303 and a second gate insulating layer 302 may be sequentially formed between the second substrate 301 and the second light-transmitting structure. The second light-transmitting structure includes a third metal layer 304, a fourth metal layer 306, a second liquid crystal layer 308, and a second driving layer 310 that are stacked. Meanwhile, a second passivation layer 305 is disposed between the third metal layer 304 and the fourth metal layer 306, a third flat layer 307 is disposed between the fourth metal layer 306 and the second liquid crystal layer 308, and a fourth flat layer 309 and a second supporting layer 311 are disposed between the second driving layer 310 and the second liquid crystal layer 308.

[0107] It should be noted that, in the embodiment of the present application, the structures of the first grating panel 20 and the second grating panel 30 are completely the same, so the first grating panel 20 and the second grating panel 30 can be manufactured using the same mask process.

[0108] Further, refer to Fig. 9 As shown, in actual production, the first substrate 201 of the first grating panel 20 and the second substrate 301 of the second grating panel 30 can be respectively manufactured on a glass substrate in the process sequence of the first gate 203 (second gate 303), the first gate 203 insulating layer 202 (second gate 303 insulating layer 302), the first metal layer 204 (third metal layer 304), the first passivation layer 205 (second passivation layer) and the second metal layer 206 (fourth metal layer).

[0109] Step 302: Connect the first grating panel 20 and the second grating panel 30, and the first grating panel 20 and the second grating panel 30 are symmetrically arranged about a connection center line.

[0110] Specifically, refer to Fig.10As shown, in step 302, high-temperature foam glue or low-temperature viscosity-reducing glue 802 can be firstly pasted on the glass substrate 801 of the first substrate 201 manufactured in step 301, and then a third polarizer 403 can be pasted on the high-temperature foam glue or low-temperature viscosity-reducing glue 802, and then the color film substrate of the first grating panel 20 is manufactured in the order of the first driving layer 210 and the first supporting layer 211.

[0111] Reference Fig.11 As shown, the first substrate 201 of the first grating panel 20 and the color filter substrate of the first grating panel 20 are matched according to the normal cell process; Fig.12 As shown, the first grating panel 20 after the box is subjected to high-temperature foaming and viscosity reduction or low-temperature viscosity reduction, and the glass substrate 801 on one side of the color filter substrate is removed; Fig.13 As shown, the color filter substrate of the second grating panel 30 is then manufactured on the first grating panel 20 after removing the glass substrate 801 on one side of the color filter substrate according to the process sequence of the second driving layer 310 and the second supporting layer 311 .

[0112] Reference Fig.14 As shown, the color filter substrate of the second grating panel 30 and the second substrate 301 of the second grating panel 30 are matched according to the normal cell process; Fig.15 and Fig.16 As shown, the first grating panel 20 and the second grating panel 30 are then cut, and the second polarizer 402 and the fourth polarizer 404 are respectively attached, and the first grid 203 of the first grating panel 20 is connected to the grating flexible circuit board, and then the first grid 203 of the first grating panel 20 and the second grid 303 of the second grating panel 30 are connected through a connecting layer, and the connecting layer here can be made of silver paste material; in this way, the connection between the first grating panel 20 and the second grating panel 30 is completed.

[0113] Reference Fig.17 and Fig.18 , which are schematic top views of the first grating panel 20 and the second grating panel 30, respectively. Fig.17 Indicates that the metal strip is driven by the metal leads on both sides. Fig.18 Indicates that the metal strip is driven by a single-sided metal lead. Fig.19 A schematic diagram showing a top view of the structure when the first grating panel 20 and the second grating panel 30 driven by the double-sided metal leads are attached together, Fig. 20 A schematic diagram of the top view of the structure when the first grating panel 20 and the second grating panel 30 driven by the single-sided metal lead are attached together.

[0114] Step 303 : providing a display screen 10 , and connecting the display screen 10 to the first grating panel 20 , wherein the first substrate 201 is connected to the substrate of the display screen 10 .

[0115] Specifically, the display screen 10 may be a conventional 2D display device, and the display screen 10 may include a substrate, a light-emitting layer, a filter layer, etc., which are stacked in sequence, wherein the substrate may be a TFT (Thin Film Transistor) substrate, and the light-emitting layer may include a stacked anode, an electron transport layer, a light-emitting material layer, a hole injection layer, a hole transport layer, a cathode, etc. The display screen 10 may emit light from, thereby realizing the display of an image. In addition, a first polarizer is also provided on the light-emitting side of the display screen 10.

[0116] The naked-eye 3D display device prepared by the above preparation method can reduce the brightness of the zero-level grayscale by using two superimposed gratings, thereby improving the ghosting problem that occurs in the naked-eye 3D display device and further improving the user's viewing experience.

[0117] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0118] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. Without more restrictions, an element defined by the phrase "comprising a ..." does not exclude the existence of other identical elements in the process, method, article or terminal device comprising the element.

[0119] The technical solution provided by the present application is described in detail above. The principle and implementation method of the present application are described in this article using specific examples. The description of the above embodiments is only used to help understand the present application, and the content of this specification should not be understood as limiting the present application. At the same time, for those of ordinary skill in the art, according to the present application, there will be different forms of changes in the specific implementation methods and application scopes. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the scope of protection of the present application.

Claims

1. A naked eye 3D display device, characterized in that: include: A display screen and a grating structure arranged on one side of the display screen; The grating structure comprises a first grating panel and a second grating panel arranged opposite to each other, the first grating panel comprises a first substrate and a first light-transmitting structure arranged on the first substrate, and the second grating panel comprises a second substrate and a second light-transmitting structure arranged on the second substrate; Wherein, the first substrate is connected to the substrate of the display screen, the first light-transmitting structure is connected to the second light-transmitting structure, and the second substrate is located on a side of the second light-transmitting structure away from the first light-transmitting structure; The first grating panel and the second grating panel are symmetrically arranged about a connection center line.

2. The naked eye 3D display device according to claim 1, characterized in that: The first grating panel includes a first grid, the second grating panel includes a second grid, and the first grid and the second grid are connected via a connecting layer; The display device further includes a grating flexible circuit board, and the grating flexible circuit board is connected to the first gate or the second gate.

3. The naked eye 3D display device according to claim 2, characterized in that: The material of the connection layer includes silver paste.

4. The naked eye 3D display device according to claim 1, characterized in that: The display device comprises a first polarizer, a second polarizer, a third polarizer and a fourth polarizer; Among them, the first polarizer is arranged on the light emitting side of the display screen, the second polarizer is arranged between the display screen and the first grating panel, the third polarizer is arranged between the first grating panel and the second grating panel, and the fourth polarizer is arranged on the side of the second grating panel away from the first grating panel.

5. The naked-eye 3D display device according to claim 4, characterized in that: The first light-transmitting structure and the second light-transmitting structure are connected via the third polarizer.

6. The naked-eye 3D display device according to any one of claims 1 to 5, characterized in that: The first light-transmitting structure includes a first metal layer, a second metal layer, a first liquid crystal layer and a first driving layer which are stacked, and the first metal layer is arranged close to the first substrate; The first metal layer includes a plurality of first metal strips, the second metal layer includes a plurality of second metal strips, and the first metal strips and the second metal strips are alternately distributed on the first substrate.

7. The naked-eye 3D display device according to any one of claims 1 to 5, characterized in that: The second light-transmitting structure includes a third metal layer, a fourth metal layer, a second liquid crystal layer and a second driving layer which are stacked, and the third metal layer is arranged close to the second substrate; The third metal layer includes a plurality of third metal strips, the fourth metal layer includes a plurality of fourth metal strips, and the third metal strips and the fourth metal strips are alternately distributed on the second substrate.

8. The naked eye 3D display device according to claim 1, characterized in that: The actual placement height between the first grating panel, the second grating panel and the display screen is: Wherein, S is the optimal viewing distance value of the viewer, P is the pixel value of the display screen, L is the pupil distance value of the human eye, and n is the refractive index of the display device.

9. The naked eye 3D display device according to claim 1, characterized in that: The display device further includes: The eye tracking device is arranged on the light emitting side of the display screen, and is used to obtain the current eye position information of the viewer in front of the display screen in real time.

10. A method for preparing a naked-eye 3D device, characterized in that: The preparation method comprises: Providing a first grating panel and a second grating panel, wherein the first grating panel comprises a first substrate and a first light-transmitting structure disposed on the first substrate, and the second grating panel comprises a second substrate and a second light-transmitting structure disposed on the second substrate; Connecting the first grating panel to the second grating panel, wherein the first grating panel and the second grating panel are symmetrically arranged about a connection center line; A display screen is provided, and the display screen is connected to the first grating panel, wherein the first substrate is connected to a substrate of the display screen.

Images