Grating adjustment device and display device

Abstract

A grating adjustment device (100) and a display device relate to the field of display technology. The grating adjustment device (100) comprises: a first substrate (1), a conductive layer (18), a dielectric layer (19), and a second substrate (2) arranged in a stacked manner; the conductive layer (18) comprises a wiring layer (26), a first insulating layer (27), and a first electrode layer (3) arranged in a stacked manner; the wiring layer (26) comprises a plurality of driving lines (24); and the first electrode layer (3) comprises a plurality of sub-electrodes (25) arranged along a first direction. The driving line (24) is used to transmit a driving signal to the sub-electrode (25), and the sub-electrode (25) is used to drive the dielectric layer (19) at the corresponding position to be light-transmissive or light-impermeable under the action of the driving signal; the grating adjustment device (100) includes a grating area (GI), the grating area (GI) includes a plurality of common signal units (23), the common signal unit (23) includes at least one grating unit (20), the grating unit (20) includes a plurality of sub-electrodes (25), and the plurality of sub-electrodes (25) located in the same grating unit (20) are respectively connected to different driving lines (24); the plurality of sub-electrodes (25) located in the same grating unit (20) are arranged along a first direction, and the sub-electrodes (25) located in the same common signal unit (23) and having the same sequence number are connected to the same driving line (24).

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on January 26, 2022, with application number 202210093757.4 and titled “A Grating Adjustment Device, 3D Display Device,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of display technology, and in particular to a grating adjustment device and a display device. Background Art

[0004] With the development and advancement of science and technology, three-dimensional (3D) display technology has become a hot research area. Most existing 3D display devices require users to wear 3D glasses, which is very inconvenient and provides a poor user experience. Therefore, naked-eye 3D display devices that can achieve 3D display effects without the need for 3D glasses are attracting attention. Summary of the Invention

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

[0006] A first substrate, a conductive layer, a dielectric layer, and a second substrate are stacked, wherein the conductive layer includes a wiring layer, a first insulating layer, and a first electrode layer, the wiring layer includes a plurality of driving lines, and the first electrode layer includes a plurality of sub-electrodes arranged along a first direction;

[0007] The driving lines are connected to the signal input terminal and the sub-electrodes respectively, and are used to transmit the driving signal input from the signal input terminal to the sub-electrodes. The sub-electrodes are used to drive the dielectric layer at the corresponding position to be light-transmissive or light-impermeable under the action of the driving signal.

[0008] The grating adjustment device includes a grating area, the grating area includes a plurality of common signal units, the common signal unit includes at least one grating unit, the grating unit includes a plurality of sub-electrodes, and the plurality of sub-electrodes located in the same grating unit are respectively connected to different driving lines;

[0009] The multiple sub-electrodes located in the same grating unit are arranged in a first direction, and the sub-electrodes located in the same common signal unit and having the same sequence number are connected to the same driving line.

[0010] In some optional embodiments, within the grating region, a plurality of driving lines are arranged along the second direction, and orthographic projections of the driving lines on the first substrate intersect with orthographic projections of a plurality of sub-electrodes on the first substrate.

[0011] In some optional embodiments, the common signal unit includes a plurality of grating units, and the driving line includes a plurality of first transfer patterns;

[0012] A plurality of sub-electrodes located in the same common signal unit and having the same serial number are respectively connected to different first transfer patterns on the same driving line through via holes.

[0013] In some optional embodiments, the routing layer further includes at least one auxiliary line, the auxiliary line is insulated from each of the sub-electrodes, and within the grating region, the at least one auxiliary line is arranged along the second direction.

[0014] In some optional implementations, the auxiliary line and the driving line are parallel to each other in the grating area; and / or,

[0015] The auxiliary line is located between at least two adjacent driving lines; and / or,

[0016] The auxiliary lines are respectively located on two opposite sides of the plurality of driving lines; and / or,

[0017] The multiple common signal units include an adjacent first common signal unit and a second common signal unit, the multiple driving lines connected to the first common signal unit are a first routing unit, the multiple driving lines connected to the second common signal unit are a second routing unit, and the auxiliary line is located between the first routing unit and the second routing unit.

[0018] In some optional embodiments, the auxiliary line and the driving line located on one side of the auxiliary line have the same pattern in the grating area.

[0019] In some optional implementations, the auxiliary line is connected to a fixed voltage input terminal, and the fixed voltage input terminal is used to transmit a fixed voltage signal to the auxiliary line.

[0020] In some optional embodiments, the plurality of common signal units include a third common signal unit and a fourth common signal unit, the plurality of driving lines connected to the third common signal unit are a third routing unit, and the plurality of driving lines connected to the fourth common signal unit are a fourth routing unit;

[0021] The driving line in the third routing unit includes a second transfer pattern, a plurality of second transfer patterns on the third routing unit and a plurality of first transfer patterns on the fourth routing unit are mutually translated in the second direction, and the second transfer pattern is insulated from each of the sub-electrodes;

[0022] The driving line in the fourth routing unit includes a third transfer pattern. The multiple third transfer patterns located on the fourth routing unit and the multiple first transfer patterns located on the third routing unit are in a translation relationship with each other in the second direction. The third transfer patterns are insulated from each of the sub-electrodes.

[0023] In some optional embodiments, the first electrode layer includes: a first sub-electrode layer, a second insulating layer, and a second sub-electrode layer that are stacked, and the first sub-electrode layer is located between the first insulating layer and the second insulating layer;

[0024] The plurality of sub-electrodes include a plurality of first sub-electrodes arranged along a first direction, and a plurality of second sub-electrodes arranged along the first direction, wherein orthographic projections of the first sub-electrodes on the first substrate and orthographic projections of the second sub-electrodes on the first substrate are alternately arranged;

[0025] The plurality of first sub-electrodes are located in the first sub-electrode layer, and the first sub-electrodes are connected to the driving lines through first via holes provided on the first insulating layer; the plurality of second sub-electrodes are located in the second sub-electrode layer, and the second sub-electrodes are connected to the driving lines through second via holes provided on the first insulating layer and the second insulating layer;

[0026] The first sub-electrode includes a bent portion, which is bent toward a side away from the second via hole to form a avoidance area for avoiding the second via hole.

[0027] In some optional implementations, the signal input end is located on any side of the grating region in the first direction.

[0028] In some optional embodiments, the grating adjustment device further includes a non-grating area located on at least one side of the grating area;

[0029] The plurality of driving lines are located in the non-grating area, the sub-electrodes extend to the non-grating area, and are connected to the corresponding driving lines through via holes in the non-grating area.

[0030] In some optional embodiments, the plurality of common signal units include a fifth common signal unit and a sixth common signal unit, and the sixth common signal unit is any one of the common signal units located on a side of the fifth common signal unit close to the signal input end;

[0031] An orthographic projection of a driving line connected to the fifth common signal unit on the first substrate intersects with an orthographic projection of at least one sub-electrode in the sixth common signal unit on the first substrate.

[0032] In some optional embodiments, the plurality of common signal units include a seventh common signal unit and an eighth common signal unit, and the eighth common signal unit is any one of the plurality of common signal units except the seventh common signal unit;

[0033] An orthographic projection of the driving line connected to the seventh common signal unit on the first substrate does not overlap with an orthographic projection of the sub-electrode in the eighth common signal unit on the first substrate.

[0034] In some optional embodiments, the driving line includes an extension line and a bending line, the extension direction of the extension line is the first direction, the extension line is connected to the sub-electrodes located in the same common signal unit and with the same serial number through a via, one end of the bending line is connected to the extension line, and the other end is connected to the signal input end, and the orthographic projection of the bending line on the first substrate does not overlap with the orthographic projection of the multiple sub-electrodes on the first substrate.

[0035] In some optional embodiments, the bending line is located on a side of the extension line away from the grating region.

[0036] In some optional implementations, the plurality of driving lines connected to the same common signal unit are divided into a first routing group and a second routing group, and the first routing group and the second routing group are respectively located on two opposite sides of the grating region.

[0037] In some optional embodiments, the plurality of sub-electrodes include first sub-electrodes and second sub-electrodes alternately arranged along the first direction, the plurality of first sub-electrodes located in the same grating unit are arranged along the first direction, and the plurality of second sub-electrodes located in the same grating unit are arranged along the first direction;

[0038] Among them, the first sub-electrodes and the second sub-electrodes with odd numbers are respectively connected to the driving lines in the first routing group; the first sub-electrodes and the second sub-electrodes with even numbers are respectively connected to the driving lines in the second routing group.

[0039] In some optional implementations, each of the sub-electrodes is connected to two driving lines, and the two driving lines are respectively located in the first routing group and the second routing group.

[0040] In some optional implementations, two driving lines connected to the same sub-electrode are connected to the same signal input terminal.

[0041] In some optional implementations, the first routing group and the second routing group are located in different film layers.

[0042] In some optional embodiments, the routing layer includes: a first routing layer, a third insulating layer, and a second routing layer that are stacked;

[0043] Among them, the driving lines in the first routing group and the signal input end are both located in the first routing layer and connected to each other, the driving lines in the second routing group are located in the second routing layer, and the two driving lines connected to the same sub-electrode are connected through vias in the non-grating area.

[0044] In some optional embodiments, the sub-electrode extends to the first side and / or the second side of the grating region, and the signal input end is located on the third side of the grating region.

[0045] In some optional embodiments, the interconnected driving lines and signal input terminals are located on the same side of the grating region, and the same side is any side of the grating region in the extension direction of the sub-electrode.

[0046] In some optional implementations, the plurality of driving lines are respectively connected to different signal input terminals.

[0047] The present disclosure provides a display device, comprising: a display panel and a grating adjustment device as described in any embodiment, wherein the grating adjustment device is located on a light-emitting side or a backlight side of the display panel.

[0048] In some optional embodiments, the display panel includes a display area and a non-display area located on at least one side of the display area;

[0049] The orthographic projection of the grating area on the plane where the display panel is located covers the display area.

[0050] In some optional embodiments, within the grating region, a plurality of driving lines are arranged along the second direction, and orthographic projections of the driving lines on the first substrate intersect with orthographic projections of the plurality of sub-electrodes on the first substrate;

[0051] The display area includes a plurality of pixel opening areas arranged in an array along the row direction and the column direction, and a non-opening area surrounding each of the pixel opening areas;

[0052] In the row direction, the orthographic projection of the driving line on the plane where the display panel is located is located within the pixel opening area, or the orthographic projection of the driving line on the plane where the display panel is located is located within the non-opening area.

[0053] In some optional embodiments, the display device further includes:

[0054] a light bar, arranged on the backlight side of the display panel;

[0055] In which, the orthographic projection of the light bar on the plane where the display panel is located, and the orthographic projections of the interconnected driving lines and signal input ends on the plane where the display panel is located are all located on the same side of the display area, and the same side is any side of the display area in the extension direction of the sub-electrode.

[0056] The present disclosure provides a 3D display device, comprising: a display panel and a grating adjustment device as described in any embodiment, wherein the grating adjustment device is arranged opposite to the display panel.

[0057] In some optional implementations, the 3D display device further includes:

[0058] an eye tracking module configured to obtain viewing distance;

[0059] The grating adjustment device is also connected to the eye tracking module and is further configured to adjust the opening position and / or aperture ratio of the grating unit according to the viewing distance.

[0060] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for the description of the embodiments or related technologies. Obviously, the drawings described below are some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. It should be noted that the scales in the drawings are for illustration only and do not represent the actual scale.

[0062] Figure 1 A schematic cross-sectional view of a first display device provided in an embodiment of the present disclosure;

[0063] Figure 2a and Figure 2b Schematic diagram of the structure of a grating adjustment device in the related art;

[0064] Figure 3 A schematic structural diagram of a grating unit provided in an embodiment of the present disclosure;

[0065] Figure 4 and Figure 5 Schematic diagram of the structures of two first sub-electrodes and second sub-electrodes provided in an embodiment of the present disclosure;

[0066] Figure 6 A schematic diagram of a 3D display method according to an embodiment of the present disclosure;

[0067] Figure 7 A schematic diagram of a method for avoiding crosstalk caused by horizontal right shift of the viewpoint provided in an embodiment of the present disclosure;

[0068] Figure 8 In the figure, Figure a is the principle diagram when no crosstalk occurs, Figure b is the principle diagram when the viewing distance is reduced, and Figure c is the principle diagram when the viewing distance is increased;

[0069] Figure 9 Schematic diagram of aperture ratio adjustment principles of several grating units provided in the embodiments of the present disclosure;

[0070] Figure 10 A schematic diagram of the connection structure of a grating adjustment device provided in an embodiment of the present disclosure;

[0071] Figures 11 to 15 Schematic diagrams of the planar structures of several grating adjustment devices provided in embodiments of the present disclosure;

[0072] Figure 16 A schematic diagram of an enlarged structure of two areas in a grating adjustment device provided in an embodiment of the present disclosure;

[0073] Figure 17 A schematic diagram of the distribution structure of auxiliary lines in a grating adjustment device provided in an embodiment of the present disclosure;

[0074] Figure 18 A schematic cross-sectional view of a second display device provided in an embodiment of the present disclosure;

[0075] Figure 19 A partial structural diagram of a grating adjustment device provided in an embodiment of the present disclosure;

[0076] Figure 20 and Figure 21 Schematic diagrams of two alignment structures between the grating adjustment device and the display panel provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0077] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0078] In the related art, when a naked-eye 3D display device is used, if the user moves slightly, crosstalk will occur, causing the user to experience adverse experiences such as nausea and dizziness.

[0079] The present disclosure provides a grating adjustment device 100, which is applied to a display device. The display device can realize 2D display or 3D display.

[0080] like Figure 1 As shown, the grating adjustment device 100 includes: a first substrate 1, a conductive layer 18, a dielectric layer 19 and a second substrate 2 arranged in layers, the conductive layer 18 includes: a wiring layer 26, a first insulating layer 27 and a first electrode layer 3 arranged in layers, the wiring layer 26 includes a plurality of driving lines 24 (such as Figures 11 to 15 As shown in FIG, the first electrode layer 3 includes a plurality of sub-electrodes 25 (as shown in FIG) arranged along a first direction (the OA direction in the figure) Figure 1 ,as well as Figures 11 to 15 shown).

[0081] like Figures 11 to 15 As shown, the driving lines 24 are respectively connected to the signal input terminals (not shown in the figure, which can be located at Figures 11 to 15 The area covered by the driving chip 5 in the middle) is connected to the sub-electrode 25, and is used to transmit the driving signal input from the signal input end to the sub-electrode 25. The sub-electrode 25 is used to drive the dielectric layer 19 at the corresponding position to be transparent or opaque under the action of the driving signal.

[0082] like Figures 11 to 15 As shown, the grating adjustment device 100 includes a grating area G1, the grating area G1 includes multiple common signal units 23, the common signal unit 23 includes at least one grating unit 20, and the grating unit 20 includes multiple sub-electrodes 25. The multiple sub-electrodes 25 located in the same grating unit 20 are respectively connected to different driving lines 24.

[0083] like Figures 11 to 15 As shown, the multiple sub-electrodes 25 located in the same grating unit 20 are arranged along the first direction (the OA direction in the figure), and the sub-electrodes 25 located in the same common signal unit 23 and with the same sequence number are connected to the same driving line 24.

[0084] Figure 2b Figure 2 shows the connection between the driving line and the sub-electrode in a common signal unit. Figure 2b In FIG, the common signal unit 23 includes 1280 grating units 20, each grating unit 20 includes 40 sub-electrodes 25. In each grating unit 20, the 40 sub-electrodes 25 are numbered 1, 2, 3, ..., 40 along the first direction. Figure 2b In the common signal unit shown, the sub-electrodes with the same serial number (for example: Figure 2bThe sub-electrode 25 with sequence number 1 is connected to the same driving line 24 . Figure 2b The common signal unit shown is connected to 40 driving lines 24 in total. Each driving line 24 is connected to 1280 sub-electrodes 25 . These 1280 sub-electrodes 25 are respectively located in different grating units 20 .

[0085] Figure 10 The connection between the driving lines and the sub-electrodes in multiple common signal units is shown. Figure 10 As shown, the grating adjustment device 100 includes 1280 grating units 20, each of which includes 40 sub-electrodes 25. Sixteen consecutive grating units 20 constitute a common signal unit 23, and the 1280 grating units 20 are divided into 80 common signal units 23, for a total of 80*16=1280 grating units 20. Within each grating unit 20, the 40 sub-electrodes 25 are numbered 1, 2, 3, ..., 40 along the first direction. Within each common signal unit 23, the sub-electrodes 25 with the same number (for example: Figure 10 The sub-electrode 25 with sequence number 1 is connected to the same driving line 24 . Figure 10 In the grating adjustment device 100 shown, each common signal unit 23 is connected to 40 driving lines 24, and a total of 80*40=3200 driving lines 24 need to be set. Each driving line 24 is connected to 16 sub-electrodes 25, and these 16 sub-electrodes 25 are respectively located in different grating units 20 within the same common signal unit 23.

[0086] In a specific implementation, a common signal unit 23 may include one grating unit 20 or multiple grating units 20. Compared to a solution in which a common signal unit 23 includes only one grating unit 20, in a solution in which the common signal unit 23 includes multiple grating units 20, a single driving line 24 can simultaneously control multiple sub-electrodes 25 within the same common signal unit 23, thereby reducing control difficulty and the number of driving lines 24, thereby saving space and lowering costs.

[0087] like Figure 1 As shown, the grating adjustment device 100 may further include a second electrode layer 4. The first substrate 1 and the second substrate 2 are arranged opposite to each other, the first electrode layer 3 is arranged on a side of the first substrate 1 close to the second substrate 2, and the second electrode layer 4 is arranged on a side of the second substrate 2 close to the first substrate 1, that is, the second electrode layer 4 is located between the dielectric layer 19 and the second substrate 2.

[0088] Alternatively, as Figure 1 As shown, the first electrode layer 3 includes: a first sub-electrode layer 31 , a second insulating layer 35 and a second sub-electrode layer 32 which are stacked. The first sub-electrode layer 31 is located between the first insulating layer 27 and the second insulating layer 35 .

[0089] like Figures 11 to 15 As shown, the multiple sub-electrodes 25 include a plurality of first sub-electrodes 33 arranged along the first direction (OA direction), and a plurality of second sub-electrodes 34 arranged along the first direction (OA direction), and the positive projections of the first sub-electrodes 33 on the first substrate 1 and the positive projections of the second sub-electrodes 34 on the first substrate 1 are alternately arranged.

[0090] Among them, such as Figure 1 As shown, a plurality of first sub-electrodes 33 are located in the first sub-electrode layer 31, and the first sub-electrodes 33 are connected to the corresponding driving lines 24 through first via holes H1 provided on the first insulating layer 27. A plurality of second sub-electrodes 34 are located in the second sub-electrode layer 32, and the second sub-electrodes 34 are connected to the corresponding driving lines 24 through second via holes H2 provided on the first insulating layer 27 and the second insulating layer 35. Figure 1 In the embodiment, the wiring layer 26 is arranged close to the first substrate 1 .

[0091] like Figures 11 to 15 As shown, the plurality of driving lines 24 include a first driving line 41 connected to the first sub-electrode 33, and a second driving line 42 connected to the second sub-electrode 34. In a specific implementation, the first driving line 41 and the second driving line 42 are both driving lines 24, and the first driving line 41 and the second driving line 42 can be located in the same layer (e.g., Figure 1 shown) or different layers.

[0092] Specifically, if Figure 1 As shown, the first sub-electrode 33 is connected to the first driving line 41 through a first via hole H1 provided on the first insulating layer 27 ; the second sub-electrode 34 is connected to the second driving line 42 through a second via hole H2 provided on the first insulating layer 27 and the second insulating layer 35 .

[0093] like Figures 11 to 15 As shown, the grating adjustment device 100 includes a plurality of first driving lines 41, a plurality of second driving lines 42, and a plurality of grating units 20 arranged along a first direction (OA direction); the grating units 20 include a plurality of first sub-electrodes 33 and a plurality of second sub-electrodes 34. The grating units 20 are configured as follows: when the grating adjustment device 100 is powered on, Figure 3 As shown, the grating unit 20 can form a light-transmitting unit 21 and a light-shielding unit 22, and the opening position (i.e., the position of the light-transmitting unit 21) and / or the aperture ratio (i.e., the ratio of the area of the light-transmitting unit 21 to the area of the grating unit 20) of the grating unit 20 is adjustable.

[0094] When the grating adjustment device 100 is powered on, the driving line 24 can transmit the driving signal input from the signal input end to the sub-electrode 25. Under the action of the driving signal, the sub-electrode 25 drives the dielectric layer 19 at the corresponding position to be light-transmissive or light-impermeable, thereby making the grating unit 20 form a light-transmitting unit 21 and a light-shielding unit 22.

[0095] like Figures 11 to 15 As shown, the multiple sub-electrodes 25 located in the same grating unit 20 are respectively connected to different driving lines 24, specifically: the multiple first sub-electrodes 33 located in the same grating unit 20 are respectively connected to different first driving lines 41, and the multiple second sub-electrodes 34 located in the same grating unit 20 are respectively connected to different second driving lines 42.

[0096] In the same grating unit 20, each first sub-electrode 33 is controlled by a different first driving line 41, and each second sub-electrode 34 is controlled by a different second driving line 42. This allows for more precise and accurate control of the voltages of each first sub-electrode 33 and each second sub-electrode 34 in the same grating unit 20, thereby more accurately adjusting the size and position of the light-shielding unit and the light-transmitting unit of the grating unit 20, thereby reducing the crosstalk problem caused by viewpoint movement.

[0097] In the above-mentioned first electrode layer 3, the first sub-electrode layer 31 can be as follows Figure 1 As shown, the first sub-electrode layer 31 is disposed on a side of the second sub-electrode layer 32 close to the first substrate 1 . Alternatively, the first sub-electrode layer 31 may be disposed on a side of the second sub-electrode layer 32 away from the first substrate 1 , which is not limited here.

[0098] It should be noted that the first sub-electrode layer 31 and the second sub-electrode layer 32 may also be provided in the same film layer, and the multiple sub-electrodes 25 provided in the same layer are separated from each other to avoid short circuit.

[0099] like Figure 1 As shown, dielectric layer 19 is disposed between first electrode layer 3 and second electrode layer 4 and may include materials such as liquid crystal molecules that can change transmittance under the action of an electric field formed by first electrode layer 3 and second electrode layer 4. Furthermore, the liquid crystal may be a TN (Twisted Nematic) liquid crystal, etc., which is not limited in this disclosure.

[0100] like Figure 1 As shown, the above-mentioned second electrode layer 4 may include a third sub-electrode 25 arranged on the entire surface; when power is turned on, the first sub-electrode 33 and the second sub-electrode 34 respectively form an electric field with the third sub-electrode 25, thereby changing the twisting of the liquid crystal molecules located between the first electrode layer 3 and the second electrode layer 4, and then changing the amount of light emitted after passing through the grating adjustment device 100, thereby forming a light-transmitting unit and a light-shielding unit.

[0101] The width of the first sub-electrode 33 along the first direction (OA direction) and the width of the second sub-electrode 34 along the first direction (OA direction) are not limited and can be selected according to the size of the display panel 200 and other conditions.

[0102] For example, the grating adjustment device 100 is applied to a 10.95-inch 3D display device, and the grating unit 20 can be as follows: Figure 4 As shown, it includes 20 first sub-electrodes 33 (respectively marked as S2, S4, S6...S40) and 20 second sub-electrodes 34 (respectively marked as S1, S3, S5...S39). Figure 5 As shown, the width of the first sub-electrode 33 and the second sub-electrode 34 along the first direction (OA direction) can be 5.2 μm respectively, the spacing between adjacent first sub-electrodes 33 along the first direction (OA direction) can be 4.0 μm, and the width of the part where the two side boundaries of the first sub-electrode 33 overlap with the second sub-electrode 34 along the direction perpendicular to the first substrate 1 in the first direction (OA direction) is 0.6 μm.

[0103] It should be noted that, in the actual manufacturing process, due to process errors, the width and spacing of the first sub-electrode 33 and the second sub-electrode 34 along the first direction (OA direction) may deviate, and no specific limitation is made to the above dimensions.

[0104] The orthographic projections of the first sub-electrodes 33 and the second sub-electrodes 34 on the first substrate 1 are alternately arranged. The orthographic projections of the first sub-electrodes 33 and the second sub-electrodes 34 on the first substrate 1 may or may not overlap, without limitation herein. Due to limitations of related processes, the boundaries of the first sub-electrodes 33 and the second sub-electrodes 34 partially overlap along a direction perpendicular to the first substrate 1. Therefore, the orthographic projections of the first sub-electrodes 33 and the second sub-electrodes 34 on the first substrate 1 partially overlap.

[0105] The first sub-electrode layer 31 is as follows Figure 1 The side of the second sub-electrode layer 32 close to the first substrate 1 is used as an example for explanation. The portion of the first sub-electrode 33 that overlaps with the second sub-electrode 34 in a direction perpendicular to the first substrate 1 (for example Figure 5 The black portion of the first sub-electrode 33 marked as S2 in the figure is an invalid electrode, which is shielded by the second sub-electrode 34 and has no effect on the liquid crystal; the portion of the first sub-electrode 33 that does not overlap with the second sub-electrode 34 in a direction perpendicular to the first substrate 1 is an effective electrode, which can control the rotation of the liquid crystal; the second sub-electrode 34 is closer to the liquid crystal layer than the first sub-electrode 33 and will not be affected by the first sub-electrode 33. Therefore, the entire second sub-electrode 34 is an effective electrode, which can control the rotation of the liquid crystal.

[0106] Of course, if the first sub-electrode layer 31 is arranged on the side of the second sub-electrode layer 32 away from the first substrate 1, at this time, the first sub-electrode 33 is closer to the liquid crystal layer than the second sub-electrode 34, and the entire first sub-electrode 33 is an effective electrode, which can control the rotation of the liquid crystal; the part of the second sub-electrode 34 that overlaps with the first sub-electrode 33 in the direction perpendicular to the first substrate 1 is an invalid electrode, which is shielded by the first sub-electrode 33 and has no effect on the liquid crystal; the part of the second sub-electrode 34 that does not overlap with the first sub-electrode 33 in the direction perpendicular to the first substrate 1 is an effective electrode, which can control the rotation of the liquid crystal.

[0107] The shapes of the first sub-electrode 33 and the second sub-electrode 34 are not limited. For example, the shapes of the first sub-electrode 33 and the second sub-electrode 34 may include: Figures 11 to 15 The cross-section of the strip shown may include a rectangle, a square, a regular trapezoid, an inverted trapezoid, etc. Figure 1 and Figure 5 The cross-sections of the first sub-electrode 33 and the second sub-electrode 34 are rectangular as an example for illustration.

[0108] When the grating adjustment device 100 is powered on, Figure 3 As shown, the grating unit 20 can be formed into light-transmitting units 21 and light-blocking units 22. The light-transmitting units allow light to pass through (equivalent to the openings of the grating unit 20), while the light-blocking units do not. Multiple grating units 20 are combined to form a grating having multiple openings. The aperture ratio of the grating unit 20 is calculated as the area of the light-transmitting unit / (the area of the light-transmitting unit + the area of the light-blocking unit).

[0109] The grating adjustment device 100 is applied to a 3D display device, such as Figure 1 As shown, the 3D display device includes a display panel 200 and a grating adjustment device 100, and the grating adjustment device 100 is arranged opposite to the display panel 200. The grating adjustment device 100 can be arranged on the light-emitting side of the display panel 200. In this case, the grating adjustment device 100 can be called a front grating; or Figure 1 As shown, the grating adjustment device 100 can be arranged on the backlight side of the display panel 200. In this case, the grating adjustment device 100 can be called a rear grating, which is not limited here.

[0110] The following takes the grating adjustment device 100 disposed on the backlight side of the display panel 200 as an example to illustrate the principle of achieving 3D display. Figure 6As shown, the positions of the user's left and right eyes are marked as viewpoint 1 and viewpoint 2, respectively (i.e., the viewpoint number n is 2). The distance between the two eyes is the interpupillary distance L. The viewing distance (i.e., the distance between the eyes and the display panel 200) is marked as S. The distance between the display panel 200 and the grating adjustment device 100 is the placement height h. The width of a single pixel unit in the display panel 200 along the first direction (OA direction) is P. The width of the grating unit 20 in the grating adjustment device 100 along the first direction (OA direction) is C (also called Pitch C). The width of the light-transmitting unit 21 along the first direction (OA direction) is a, and the width of the light-shielding unit 22 along the first direction (OA direction) is Ca. It should be noted that the display panel 200 includes a plurality of pixel units arranged in an array. A pixel unit may include a plurality of sub-pixels, such as red (R) sub-pixels, green (G) sub-pixels, or blue (B) sub-pixels.

[0111] Figure 6 In the embodiment, by controlling the opening size and opening position of the grating unit 20, when viewpoint 1 views the first display area A1 of the display panel 200, it corresponds to the light-transmitting unit 21, while when viewpoint 2 views the first display area A1 of the display panel 200, it corresponds to the light-blocking unit 22. That is, at the same observation moment, viewpoint 1 can see the first display area A1, while viewpoint 2 cannot. Similarly, by controlling the opening size and opening position of the grating unit 20, at the same observation moment, viewpoint 2 can see the second display area A2, while viewpoint 1 cannot. In this way, the image of the first display area A1 seen by viewpoint 1 and the image of the second display area A2 seen by viewpoint 2 can produce parallax, thereby forming stereoscopic vision and realizing 3D display.

[0112] like Figure 6 As shown, according to the geometric relationship of the triangle, we can get:

[0113] h / (h+S)=P / L(1)

[0114] C / nP=(S+h) / S(2)

[0115] a / P=(S+h) / S(3)

[0116] According to formulas (1), (2), and (3), we can obtain C = nPL / (LP) (4), h = SP / (LP) (5), and a / C = 1 / n (6). The number of viewpoints n can be 2. The width C and placement height h of the grating unit 20 along the first direction (OA direction) in the grating adjustment device 100 can be determined by referring to formulas (4) and (5), respectively. In formula (6), when the number of viewpoints n is 2, the width of the light-transmitting unit along the first direction (OA direction) and the width of the light-shielding unit along the first direction (OA direction) in the grating unit 20 are the same.

[0117] In actual use of 3D display devices, there are many situations that cause crosstalk.

[0118] The first type is crosstalk caused by the user moving left and right horizontally while the viewing distance remains unchanged. Figure 7 As shown, taking the viewpoint moving rightward along the first direction (OA) as an example, viewpoint 1 moves from position a to position a1, and viewpoint 2 moves from position b to position b1. If the widths of the light-shielding and light-transmitting elements of the grating unit 20 along the first direction (OA) remain unchanged, that is, the structure of the grating adjustment device 100 remains the same as before adjustment, and taking viewpoint 1 at positions a and a1 as examples, when viewpoint 1 is at position a, viewing the first display area A1 of the display panel 200, the light-shielding elements correspond to the light-shielding elements, so viewpoint 1 at position a cannot see the first display area. However, when viewpoint 1 is at position a1, viewing the first display area A1 of the display panel 200, the light-shielding and light-transmitting elements correspond to the light-shielding elements, so viewpoint 1 at position a1 can see the first display area. In other words, when viewpoint 1 moves from position a to position a1, the display area it can view changes, resulting in crosstalk, which can cause adverse user experiences such as nausea and dizziness. Figure 7 In order to better compare the structures of the grating adjustment device 100 before and after adjustment, the two are illustrated separately.

[0119] To address the crosstalk caused by horizontal movement, the opening position of the grating element 20 in the grating adjustment device 100 can be controlled to match the shifted viewpoint. Because different first sub-electrodes 33 in the same grating element 20 are connected to different first drive lines 41, and different second sub-electrodes 34 are connected to different second drive lines 42, the voltages of the corresponding first sub-electrodes 33 and second sub-electrodes 34 are controlled by multiple first drive lines 41 and multiple second drive lines 42, respectively. Therefore, by controlling the voltages of the corresponding first sub-electrodes 33 and second sub-electrodes 34 via multiple first drive lines 41 and multiple second drive lines 42, some or all of the light-transmitting elements are converted into light-shielding elements, and vice versa, the opening position of the grating element 20 is changed.

[0120] like Figure 7 As shown, taking viewpoint 1 as an example, when viewpoint 1 moves from position a to position a1 (moves rightward along the first direction (OA direction)), by controlling the first driving line 41 and the second driving line 42, the positions of the light shielding unit and the light transmitting unit of the grating unit 20 can be changed (the grating adjustment device 100 moves leftward in the overall effect). The adjusted grating unit 20 is shown in FIG. Figure 7 As shown, after the adjustment, viewpoint 1 cannot see the first display area at position a1, thereby ensuring as much as possible that the viewing effect is consistent after the viewpoint moves, thereby reducing the crosstalk phenomenon.

[0121] like Figure 7 As shown, according to the triangle geometric relationship, if the moving distance of the viewpoint 1 is y and the left moving distance of the grating adjustment device 100 is x, then x / y=h / S, where h is the placement height and S is the viewing distance. Taking a 10.95-inch 3D display device as an example, the distribution of the first sub-electrodes 33 and the second sub-electrodes 34 is as follows: Figure 4 As shown, the average width of the first sub-electrode 33 and the second sub-electrode 34 along the first direction (OA direction) can be 4.6 μm, each grating unit 20 includes 20 first sub-electrodes 33 and 20 second sub-electrodes 34, the pixel width P=92.13 μm, the pupil distance L=65 mm, and the observation distance S=450 mm. Then, the pitch C of the grating adjustment device 100 is 184.52 μm. When moving horizontally left and right, the theoretical maximum crosstalk is about 5%, which is in line with the expected value.

[0122] like Figure 5 As shown, since the width of the first sub-electrode 33 and the second sub-electrode 34 along the first direction is 5.21 μm respectively, and the spacing between adjacent first sub-electrodes 33 along the first direction is 4.01 μm, the total width of two adjacent sub-electrodes 25 is 9.22 μm, and the average width of each sub-electrode 25 along the first direction can be approximately 4.6 μm, that is, 9.22 μm / 2≈4.6 μm.

[0123] Since the average width of the sub-electrode 25 is 4.6 μm, the theoretical maximum deviation value caused by horizontal movement is 4.6 μm. The theoretical maximum crosstalk = the theoretical maximum deviation value caused by horizontal movement / pixel width = 4.6 μm / 92.13 μm = 5%.

[0124] In the present disclosure, within the same barrier element 20, different first sub-electrodes 33 are connected to different first drive lines 41, and different second sub-electrodes 34 are connected to different second drive lines 42. Thus, by controlling the voltages of the corresponding first sub-electrodes 33 and second sub-electrodes 34 via multiple first drive lines 41 and multiple second drive lines 42, some or all of the light-transmitting elements are converted into light-shielding elements, and vice versa. This allows the aperture position of the barrier element 20 to be varied, thereby mitigating crosstalk caused by horizontal left-right movement of the user while maintaining a constant viewing distance.

[0125] The second type is crosstalk caused by changes in viewing distance. Figure 8As shown, Figure a shows the sight line diagram at the optimal viewing distance. In this case, crosstalk does not occur. Viewpoint 1 (left eye) can see the first display area A1, and the right eye can see the second display area A2. Figure b shows the sight line diagram when the viewing distance is shortened. When the viewing distance is shortened, if the structure of the grating adjustment device 100 remains unchanged, viewpoint 1 (left eye) can see the first display area A1 and part of the other display areas to the left of the first display area A1, while viewpoint 2 (right eye) can see the second display area A2 and part of the other display areas to the right of the second display area A2, resulting in crosstalk. Figure c shows the sight line diagram when the viewing distance is increased. When the viewing distance is increased, if the structure of the grating adjustment device 100 remains unchanged, viewpoint 1 (left eye) can see the entire first display area A1, part of the other display areas to the left of the first display area A1, and part of the second display area A2. Viewpoint 2 (right eye) can see the entire second display area A2, part of the other display areas to the right of the second display area A2, and part of the first display area A1, resulting in crosstalk. That is, when the viewing distance changes (including getting farther or closer), the display area that can be viewed changes, resulting in crosstalk, causing users to experience nausea, dizziness, and other adverse experiences.

[0126] To address crosstalk caused by changes in viewing distance, the aperture ratio of the grating elements 20 in the grating adjustment device 100 can be controlled so that the adjusted aperture ratio of the grating elements 20 is 0.5*(1-h*(LP)*|1 / S-1 / S'| / P). Here, S is the optimal viewing distance before zooming, and S' is the viewing distance after zooming. The formula for the aperture ratio indicates that the viewing distance corresponding to the maximum aperture ratio is the optimal viewing distance after the aperture ratio change. Furthermore, based on the triangular geometry, it can be inferred that during zooming, the theoretical width of the grating elements 20 in the grating adjustment device 100 along the first direction (OA) is 2P(1+h / S).

[0127] Figure 2b Taking the grating adjustment device 100 as an example of a 10.95-inch 3D display device, the grating adjustment device 100 may include 1280 grating units 20, all of which are located in the same common signal unit 23. Each grating unit 20 includes 20 first sub-electrodes 33 and 20 second sub-electrodes 34. The alternating first sub-electrodes 33 and second sub-electrodes 34 are numbered 1, 2, 3, ..., 40. In the common signal unit 23, the first sub-electrodes 33 with the same number (for example: Figure 2b The first sub-electrode 33 with the serial number 1 is connected to the same first driving line 41, and the second sub-electrode 34 with the same serial number (for example: Figure 2b The first sub-electrode 33 with sequence number 2 is connected to the same second driving line 42 .

[0128] Figure 2a Shown Figure 2b The schematic diagram of the planar structure of the grating adjustment device is shown in FIG. Figure 2a As shown, in each grating element 20, multiple first sub-electrodes 33 are arranged along the first direction (OA direction) OA direction (the first sub-electrodes 33 numbered 1, 2, 3, ..., n are labeled t1, t2, t3, ..., tn, respectively), and multiple second sub-electrodes 34 are arranged along the first direction (OA direction) OA direction (the second sub-electrodes 34 numbered 1, 2, 3, ..., n are labeled d1, d2, d3, ..., dn, respectively). Specifically, the first sub-electrode 33 numbered t1 in the first grating element 20 on the left and the first grating element 20 on the right is connected to the same first driving line 41 labeled L1, and the second sub-electrode 34 numbered d1 in the first grating element 20 on the left and the first grating element 20 on the right is connected to the same second driving line 42 labeled M1. The situations of first sub-electrodes 33 and second sub-electrodes 34 with other numbers can be referred to above and are not listed here one by one.

[0129] like Figure 2a and Figure 2b As shown, when all the grating units 20 in the grating adjustment device 100 are located in the same common signal unit 23, when performing perspective adjustment, combined with the above description, when the placement height h of the grating adjustment device 100 and the pixel width P of the display panel 200 are determined, parameters such as the aperture ratio of the grating unit 20, the theoretical width of the grating unit 20, the design width deviation, and the proportion of the area with crosstalk ≤ 10% at different viewing distances can be obtained. For details, please refer to Table 1.

[0130] Table 1

[0131]

[0132] In Table 1, the corresponding structure has no crosstalk when the viewing distance is 450mm. As can be seen from Table 1, when the viewing distance is 450mm and the near-far offset is 50mm, the area with crosstalk ≤ 10% is only about 20%.

[0133] Initially, the structure of the plurality of grating units 20 is as follows: Figure 9 After the viewing distance is adjusted (ie, after moving far and near), the required grating unit 20 structure is as shown in FIG. Figure 9 As shown in W1 in FIG, the aperture ratio of the grating unit 20 is reduced; if all grating units 20 are located in the same common signal unit 23, that is, all grating units 20 are adjusted as a whole, the structure of the grating unit 20 after the aperture ratio is adjusted is as follows Figure 9 As shown in W2 in , due to the overall adjustment, the position of the light-transmitting area has a cumulative deviation, such as Figure 9As shown in area A in FIG, the crosstalk cannot be completely eliminated.

[0134] In order to solve the above problems, in the present disclosure, Figure 10 As shown, the multiple grating elements 20 in the grating adjustment device 100 are divided into multiple groups, and the grating elements 20 in the same group constitute a common signal unit 23. That is, the grating region G1 includes multiple common signal units 23, each of which includes at least one grating element 20. The multiple sub-electrodes 25 in the same grating element 20 are arranged along a first direction (the OA direction). Among the multiple sub-electrodes 25 in the same common signal unit 23, the sub-electrodes 25 with the same sequence number are connected to the same driving line 24.

[0135] like Figure 10 As shown, the grating adjustment device 100 is used in a 10.95-inch 3D display device as an example. Each grating unit 20 includes 20 first sub-electrodes 33 and 20 second sub-electrodes 34. Within each grating unit 20, the 20 first sub-electrodes 33 and the 20 second sub-electrodes 34 are numbered 1, 2, 3, ..., 40, respectively. Within the same common signal unit 23, first sub-electrodes 33 with the same number are connected to the same first driving line 41, and second sub-electrodes 34 with the same number are connected to the same second driving line 42.

[0136] Specifically, if Figures 11 to 15 As shown, in the grating unit 20, a plurality of first sub-electrodes 33 are arranged along the first direction (OA direction) OA direction (the first sub-electrodes 33 with serial numbers 1, 2, 3...n are marked as t1, t2, t3...tn respectively), and a plurality of second sub-electrodes 34 are arranged along the first direction (OA direction) OA direction (the second sub-electrodes 34 with serial numbers 1, 2, 3...n are marked as d1, d2, d3...dn). In the same common signal unit 23, as shown in FIG. Figures 11 to 15 As shown, first sub-electrodes 33 with the same number (such as the first sub-electrode 33 marked as t1) are connected to the same first driving line 41, and second sub-electrodes 34 with the same number (such as the second sub-electrode 34 marked as d1) are connected to the same second driving line 42.

[0137] like Figure 9 As shown, by dividing the plurality of grating units 20 into a plurality of common signal units 23, the plurality of common signal units 23 can be adjusted separately, and the adjustments between different common signal units 23 do not affect each other. The structure after the aperture ratio of the grating unit 20 is adjusted by adopting this solution is as follows Figure 9 As shown in W3 in FIG, since different common signal units 23 can be adjusted separately, the aperture ratios of the grating units 20 in different common signal units 23 can be adjusted independently. Figure 9The aperture ratios of the grating units 20 in the common signal units marked as group 1 and the aperture ratios of the grating units 20 in the common signal units marked as group 2 are adjusted, thereby avoiding cumulative deviations and reducing crosstalk caused by near and far movements. At the same time, the problem of a sharp drop in brightness due to adjusting the aperture ratio is not caused.

[0138] The same design parameters as in Table 1 are used, except that the 1280 grating elements 20 are divided into 80 common signal elements 23 for separate control. The width of the first sub-electrode 33 and the second sub-electrode 34 is 5.21 μm, and the spacing between adjacent first sub-electrodes 33 is 4.01 μm. Combined with the above description, calculations yield the values in Table 2.

[0139] Table 2

[0140]

[0141] In Table 2, the corresponding structure exhibits no crosstalk at a viewing distance of 450mm. As can be seen from Table 2, at viewing distances of 400mm-600mm, the maximum crosstalk is less than 5%, significantly reducing the crosstalk situation and well below the design requirements. It should be noted that the number of common signal units 23 is N, the maximum offset corresponding to each common signal unit 23 is N1, and the width of the grating unit 20 is C. For example, if the design crosstalk value is ≤5%, the value of N can be determined based on N1 / N≤5%*C. The maximum offset N1 is the average width of the sub-electrodes 25 in the grating unit 20 along the first direction.

[0142] like Figures 10 to 15 As shown, two sub-electrodes 25 located in different common signal units 23 are connected to different driving lines 24 respectively.

[0143] When the multiple grating units 20 in the grating adjustment device 100 are divided into multiple common signal units 23; optionally, the multiple driving lines 24 can be divided into multiple routing units, the number of routing units is the same as the number of common signal units 23, and the multiple routing units are respectively connected to different common signal units 23, and the number of driving lines 24 in the routing unit is the same as the number of sub-electrodes 25 in the grating unit 20.

[0144] like Figure 12As shown, in the first common signal unit 23 on the left, multiple first sub-electrodes 33 are connected to a first driving line 41 labeled L1, and multiple second sub-electrodes 34 are connected to a second driving line 42 labeled M1. These first driving lines 41 labeled L1 and second driving lines 42 labeled M1 constitute a routing unit. In the first common signal unit 23 on the right, multiple first sub-electrodes 33 are connected to a first driving line 41 labeled L2, and multiple second sub-electrodes 34 are connected to a second driving line 42 labeled M2. These first driving lines 41 labeled L2 and second driving lines 42 labeled M2 constitute another routing unit.

[0145] In this way, different common signal units 23 are connected to different routing units, and different common signal units 23 are controlled respectively by multiple routing units, thereby achieving precise adjustment of the opening position and aperture ratio of the grating unit 20 and further alleviating the crosstalk problem.

[0146] like Figure 1 、 Figures 11 to 15 As shown, the grating adjustment device 100 further includes a non-grating region G2 located on at least one side of the grating region G1.

[0147] In a specific implementation, there are various embodiments for disposing the plurality of driving lines 24 in the grating adjustment device 100. Several embodiments are exemplarily described below.

[0148] In a first embodiment, if Figure 11 As shown, in the grating region G1, a plurality of driving lines 24 are arranged along the second direction ( Figure 11 The orthographic projections of the driving lines 24 on the first substrate 1 intersect with the orthographic projections of the plurality of sub-electrodes 25 on the first substrate 1. The interconnected driving lines 24 and sub-electrodes 25 are connected by vias at the intersections.

[0149] The second direction may be perpendicular to the first direction.

[0150] In this embodiment, the signal input terminal can be located on either side of the grating region G1. In order to shorten the length of the driving line 24 and reduce the transmission resistance, it is optional to Figure 11 As shown, the signal input terminal can be located on any side of the grating region G1 in the first direction (the OA direction in the figure).

[0151] exist Figure 11 In the embodiment, the first direction is vertical, so the signal input terminal can be located at the upper side or the lower side of the grating region G1 (e.g. Figure 11 shown). Figure 11 In the embodiment, a plurality of signal input terminals are provided in the area covered by the driver chip 5. The signal input terminals are used to bind the driver chip 5, and the signal input terminals and the channels of the driver chip 5 may correspond one to one.

[0152] In this embodiment, the plurality of driving lines 24 and the plurality of signal input terminals may be arranged in the same layer or in different layers, which is not limited in the present disclosure.

[0153] In this embodiment, since the driving line is arranged in the grating region G1, it is only necessary to Figure 11 The signal input terminal only needs to be set on the lower side (as shown in the figure), and no wiring is required on the left, right and upper sides of the grating area G1, so a narrow frame on three sides can be achieved.

[0154] Optionally, the common signal unit 23 includes a plurality of grating units 20, and each driving line 24 may include a plurality of first transfer patterns P1, such as Figure 16 As shown in the left figure, Figure 16 The left picture is Figure 11 The enlarged view of the dotted box A in the middle, wherein the multiple sub-electrodes 25 located in the same common signal unit 23 and having the same serial number are respectively connected to different first transfer patterns P1 on the same driving line 24 through vias.

[0155] The orthographic projection of the first transfer pattern P1 on the first substrate 1 is located at the intersection of the interconnected drive line 24 and the sub-electrode 25. The first transfer pattern P1 on the drive line 24 is connected to the corresponding sub-electrode 25 through a via hole, thereby achieving connection between the drive line 24 and the corresponding sub-electrode 25.

[0156] Alternatively, as Figure 11 As shown, the wiring layer 26 further includes at least one auxiliary line 29, the auxiliary line 29 and each sub-electrode 25 are insulated from each other, and in the grating region G1, at least one auxiliary line 29 is arranged along the second direction ( Figure 11 OB direction) arrangement.

[0157] like Figure 16 Left picture in or Figure 11 As shown, the auxiliary lines 29 are not connected to the sub-electrodes 25. Since the auxiliary lines 29 and the driving lines 24 are both arranged along the second direction, the provision of the auxiliary lines 29 can improve the uniformity of the distribution of the lines, thereby improving the display uniformity and avoiding the occurrence of brightness moiré caused by only partially providing the lines.

[0158] Furthermore, the wiring in the wiring layer 26 (including the auxiliary line 29 and the driving line 24) is arranged in the second direction ( Figure 11 The pixels can be evenly arranged in the middle OB direction), thereby further improving the display uniformity.

[0159] Alternatively, as Figure 11 As shown, the auxiliary lines 29 and the driving lines 24 are parallel to each other in the grating region G1.

[0160] Alternatively, as Figure 11 As shown, the auxiliary line 29 is located between at least two adjacent driving lines 24. By providing the auxiliary line 29 between two adjacent driving lines 24, signal crosstalk between the driving lines 24 located on both sides of the auxiliary line 29 can be reduced.

[0161] Alternatively, as Figure 17 As shown, the auxiliary lines 29 are respectively located on two opposite sides of the plurality of driving lines 24. Specifically, the auxiliary lines 29 can be respectively located on two opposite sides of the plurality of driving lines 24 in the second direction. For example, a portion of the auxiliary lines 29 (in Figure 17 Two in the figure) are located on the left side of the plurality of driving lines 24 in the grating region G1, and a portion of the auxiliary lines 29 (in Figure 17 The plurality of driving lines 24 may be located on the right side of the plurality of driving lines 24 in the grating region G1.

[0162] Alternatively, as Figure 17 As shown, the multiple common signal units 23 include an adjacent first common signal unit 231 and a second common signal unit 232, the multiple driving lines 24 connected to the first common signal unit 231 constitute a first routing unit 171, and the multiple driving lines 24 connected to the second common signal unit 232 constitute a second routing unit 172, and the auxiliary line 29 can be located between the first routing unit 171 and the second routing unit 172.

[0163] In this way, the auxiliary line 29 can serve as the dividing line between the first routing unit 171 and the second routing unit 172, and play the role of a positioning mark during the process; in addition, the auxiliary line located between the first routing unit 171 and the second routing unit 172 can also reduce the signal crosstalk between the first routing unit 171 and the second routing unit 172.

[0164] The first common signal unit 231 may be any common signal unit 23 among the plurality of common signal units 23 . The second common signal unit 232 may be any common signal unit 23 adjacent to the first common signal unit 231 .

[0165] Alternatively, as Figure 16 As shown in the left figure in FIG, the auxiliary line 29 and the driving line 24 located on one side of the auxiliary line 29 have the same pattern in the grating area G1.

[0166] Specifically, a dummy transfer pattern P0 may be provided on the auxiliary line 29. The dummy transfer pattern P0 may have the same size and / or position (position in the first direction (OA direction)) as the first transfer pattern P1 on the driving line 24 located on the left side of the auxiliary line 29, such as Figure 16As shown in the left figure in ; it can also have the same size and / or position (position in the first direction (OA direction)) as the first transfer pattern P1 on the driving line 24 located on the right side of the auxiliary line 29; in addition, in the first direction, the virtual transfer pattern P0 can also be located between the first transfer patterns P1 on both sides, which is not limited in the present disclosure.

[0167] Alternatively, as Figure 11 As shown, the auxiliary line 29 is connected to the fixed voltage input terminal 111 , and the fixed voltage input terminal 111 is used to transmit a fixed voltage signal to the auxiliary line 29 .

[0168] like Figure 11 As shown, the auxiliary line 29 is connected to the fixed voltage lead 112 located in the non-grating area G2, and the fixed voltage lead 112 is connected to the fixed voltage input terminal 111 located in the non-grating area G2.

[0169] Since the voltage on the auxiliary line 29 is a fixed voltage, the auxiliary line 29 can shield interference signals and prevent signal crosstalk between the driving lines 24 on both sides thereof.

[0170] Alternatively, as Figure 11 As shown, the multiple common signal units 23 include a third common signal unit 233 and a fourth common signal unit 234 , the multiple driving lines 24 connected to the third common signal unit 233 constitute a third routing unit 113 , and the multiple driving lines 24 connected to the fourth common signal unit 234 constitute a fourth routing unit 114 .

[0171] in, Figure 16 The left picture is Figure 11 An enlarged view of the dotted box A (corresponding to a portion of the fourth routing unit 114 ). Figure 16 The right picture is Figure 11 An enlarged view of the dotted box B (corresponding to a portion of the third routing unit 113 ).

[0172] like Figure 16 As shown, the driving lines 24 in the third routing unit 113 include second transfer patterns P2. The multiple second transfer patterns P2 on the third routing unit 113 and the multiple first transfer patterns P1 on the fourth routing unit 114 are mutually translated in the second direction (direction OB in the figure). In other words, the multiple first transfer patterns P1 on the fourth routing unit 114 are translated along the second direction to the driving lines 24 in the third routing unit 113 to form the multiple second transfer patterns P2.

[0173] The second transfer pattern P2 and each sub-electrode 25 are insulated from each other, that is, the second transfer pattern P2 is not connected to the sub-electrode 25 .

[0174] Figure 16The left picture in the figure can also be Figure 11 An enlarged view of the dotted box C (corresponding to a portion of the third routing unit 113 ). Figure 16 The right picture in the figure can also be Figure 11 An enlarged view of the dotted box D (corresponding to a portion of the fourth routing unit 114 ).

[0175] Similarly, the driving lines 24 in the fourth routing unit 114 also include third transfer patterns P3. The multiple third transfer patterns P3 on the fourth routing unit 114 are translated relative to the multiple first transfer patterns P1 on the third routing unit 113 in the second direction (direction OB in the figure). That is, the multiple third transfer patterns P3 are obtained by translating the multiple first transfer patterns P1 on the third routing unit 113 along the second direction to the driving lines 24 in the fourth routing unit 114.

[0176] The third transfer pattern P3 is insulated from each sub-electrode 25 , that is, the third transfer pattern P3 is not connected to the sub-electrode 25 .

[0177] By providing a plurality of second transfer patterns P2 on the third routing unit 113 and a plurality of third transfer patterns P3 on the fourth routing unit 114, and the second transfer patterns P2 and the first transfer pattern P1 are in a translation relationship with each other in the second direction, and the third transfer pattern P3 and the first transfer pattern P1 are in a translation relationship with each other in the second direction, the distribution uniformity of the transfer patterns (including the first transfer pattern P1, the second transfer pattern P2 and the third transfer pattern P3) on the driving line 24 can be improved, and the macroscopic visibility caused by only partially providing the transfer pattern (such as only providing the first transfer pattern P1) can be avoided, thereby avoiding the occurrence of moiré patterns.

[0178] contrast Figure 16 In the left and right figures, the virtual transfer pattern P0 located on the auxiliary line 29 in the fourth routing unit 114 and the virtual transfer pattern P0 located on the auxiliary line 29 in the third routing unit 113 are translated relative to each other in the second direction (OB direction in the figure).

[0179] Optionally, the driving line directions in the third wiring unit 113 and the driving line directions in the fourth wiring unit 114 may be the same or different (eg, Figure 16 shown).

[0180] Reference Figure 11 and Figure 16 , the driving lines in the dotted box A and the dotted box B have different directions, and the driving lines in the dotted box C and the dotted box D have different directions. In actual applications, the driving lines in the dotted box A and the dotted box B can have the same direction, and the driving lines in the dotted box C and the dotted box D can also have the same direction, and this disclosure is not limited to this.

[0181] Alternatively, as Figure 11 As shown, the transfer patterns in the dotted box A and multiple dotted boxes B (including the first transfer pattern P1, the second transfer pattern P2 and the third transfer pattern P3) are all in a translation relationship with each other in the second direction (the OB direction in the figure), and the transfer patterns in the dotted box C and multiple dotted boxes D (including the first transfer pattern P1, the second transfer pattern P2 and the third transfer pattern P3) are all in a translation relationship with each other in the second direction (the OB direction in the figure).

[0182] Alternatively, as Figure 16 As shown in the left figure in FIG, the first sub-electrode 33 includes a bent portion 161, and the bent portion 161 is bent toward a side away from the second via hole H2 to form an avoidance area for avoiding the second via hole H2.

[0183] like Figure 1 As shown, the second via H2 connecting the second sub-electrode 34 and the second driving line 42 passes through the first sub-electrode layer 31. In order to avoid a short circuit between the first sub-electrode 33 and the second sub-electrode 34, the bent portion 161 on the first sub-electrode 33 is bent toward the side away from the second via H2, thereby increasing the distance between the first sub-electrode 33 and the second via H2, forming an avoidance zone around the second via H2, and thereby reducing the requirements for process control accuracy.

[0184] In a second embodiment, if Figures 12 to 15 As shown, a plurality of driving lines 24 are located in the non-grating region G2 , and the sub-electrodes 25 extend to the non-grating region G2 and are connected to the corresponding driving lines 24 through via holes in the non-grating region G2 .

[0185] In this embodiment, by setting all the driving lines 24 in the non-grating area G2, the formation of brightness moiré in the grating area G1 can be avoided, thereby avoiding affecting the aperture ratio of the display device. In addition, the bonding accuracy requirements between the grating adjustment device 100 and the display panel 200 can be reduced.

[0186] In order to reduce the wiring setting and simplify the process, one end or both ends of the first sub-electrode 33 extend to the non-grating area G2 and are connected to the corresponding first driving line 41; one end or both ends of the second sub-electrode 34 extend to the non-grating area G2 and are connected to the corresponding second driving line 42. In this way, the connection between the first sub-electrode 33 and the first driving line 41, as well as the connection between the second sub-electrode 34 and the second driving line 42 can be achieved without the need for additional lead lines, which is simple and easy to implement.

[0187] Alternatively, as Figure 12As shown, multiple common signal units 23 include a fifth common signal unit 235 and a sixth common signal unit 236, and the sixth common signal unit 236 is any common signal unit 23 located on the side of the fifth common signal unit 235 close to the signal input end; the positive projection of the driving line 24 connecting the fifth common signal unit 235 on the first substrate 1 intersects with the positive projection of at least one sub-electrode 25 in the sixth common signal unit 236 on the first substrate 1.

[0188] Specifically, if Figure 12 As shown, any driving line 24 (such as Figure 12 The orthographic projection of the driving line (marked as L1 or M1 in the figure) on the first substrate 1 overlaps with the orthographic projection of the portion of the multiple sub-electrodes 25 in the sixth common signal unit 236 extending to the non-grating area G2 on the first substrate 1.

[0189] Alternatively, as Figures 13 to 15 As shown, the plurality of common signal units 23 include a seventh common signal unit 237 and an eighth common signal unit 238 . The eighth common signal unit 238 is any common signal unit 23 among the plurality of common signal units 23 except the seventh common signal unit 237 .

[0190] The driving line 24 (eg, Figures 13 to 15 The orthographic projection of the driving lines (marked as L1 and M1 in FIG) on the first substrate 1 has no overlap with the orthographic projection of the sub-electrode 25 in the eighth common signal unit 238 on the first substrate 1.

[0191] Reference Figure 19 Shown Figure 13 The design structure diagram at the position of the dotted box E. Figure 19 As shown, each driving line 24 includes an extension line 191 (such as Figure 19 The thin black line in FIG. 1 and the bending line 192 (shown in FIG. Figure 19 As shown by the thick black line, the extension direction of the extension line 191 is the first direction (the OA direction in the figure), the extension line 191 is connected to the sub-electrode with the same serial number and located in the same common signal unit 23 through a via in the non-grating area G2, and one end of the bending line 192 is connected to the extension line 191, and the other end is connected to the signal input end, so that the connection between the extension line 191 and the signal input end can be achieved through the bending line 192.

[0192] Alternatively, as Figure 19 As shown, the orthographic projection of the bending line 192 on the first substrate 1 does not overlap with the orthographic projections of the plurality of sub-electrodes 25 on the first substrate 1. That is, the orthographic projection of the bending line 192 on the first substrate 1 does not overlap with the orthographic projection of any sub-electrode 25 on the first substrate 1.

[0193] Alternatively, as Figure 19 As shown, the bending line 192 is located on a side of the extension line 191 away from the grating region G1.

[0194] By properly arranging the bending lines 192 , it can be achieved that the orthographic projection of the driving line 24 connecting the seventh common signal unit 237 on the first substrate 1 does not overlap with the orthographic projection of the sub-electrode 25 in the eighth common signal unit 238 on the first substrate 1 .

[0195] Reference Figure 19 In the second direction (OB direction in the figure), the lengths of the sub-electrodes 25 connected to the same driving line 24 can be the same (eg Figure 19 shown), may also be different, and this disclosure is not limited to this.

[0196] like Figures 13 and 14 As shown, when the eighth common signal unit 238 is located on the side of the seventh common signal unit 237 close to the signal input terminal, the bending line 192 connecting the seventh common signal unit 237 is located on the side of the bending line 192 connecting the eighth common signal unit 238 away from the grating region G1. That is, the bending line 192 connecting the seventh common signal unit 237 is located outside the bending line 192 connecting the eighth common signal unit 238. This can prevent short circuits between the driving lines.

[0197] Alternatively, as Figures 12 to 14 As shown, the multiple driving lines 24 connected to the same common signal unit 23 are divided into a first routing group R1 and a second routing group R2. That is, the multiple driving lines 24 in each routing unit are divided into a first routing group R1 and a second routing group R2.

[0198] The first routing group R1 may include the first driving line 41 and the second driving line 42. The second routing group R2 may include the first driving line 41 and the second driving line 42.

[0199] Optionally, the first routing group R1 and the second routing group R2 are located on opposite sides of the grating region G1 . Further, the first routing group R1 and the second routing group R2 are located on opposite sides of the grating region G1 in the extension direction of the sub-electrodes 25 .

[0200] By arranging the first routing group R1 and the second routing group R2 on opposite sides of the grating area G1, respectively, the routing space of the driving line 24 can be increased, the width of the driving line 24 can be increased, the transmission resistance of the driving line 24 can be reduced, the driving capability and response speed can be improved, and mutual interference caused by overly dense routing can be avoided.

[0201] like Figure 12As shown, the extension direction of the sub-electrode 25 is vertical, so the first routing group R1 and the second routing group R2 are located on the upper side and the lower side of the grating region G1.

[0202] like Figure 13 and Figure 14 As shown, the extension direction of the sub-electrode 25 is horizontal, so the first routing group R1 and the second routing group R2 are located on the left and right sides of the grating region G1.

[0203] exist Figure 12 In the figure, the plurality of driving lines 24 connected to the first common signal unit 235 on the left side include a plurality of first driving lines 41 labeled L1 and a plurality of second driving lines 42 labeled M1. The corresponding first routing group R1 includes the first driving lines 41 labeled L1 and the second driving lines 42 labeled M1 located below the grating region G1. The corresponding second routing group R2 includes the first driving lines 41 labeled L1 and the second driving lines 42 labeled M1 located above the grating region G1.

[0204] exist Figure 12 In the figure, the plurality of driving lines 24 connected to the first common signal unit 236 on the right side include a plurality of first driving lines 41 labeled L2 and a plurality of second driving lines 42 labeled M2. The corresponding first routing group R1 includes the first driving lines 41 labeled L2 and the second driving lines 42 labeled M2 located below the grating region G1. The corresponding second routing group R2 includes the first driving lines 41 labeled L2 and the second driving lines 42 labeled M2 located above the grating region G1.

[0205] exist Figure 13 , the plurality of driving lines 24 connected to the first common signal unit 237 on the upper side include a plurality of first driving lines 41 labeled L1 and a plurality of second driving lines 42 labeled M1. The corresponding first routing group R1 includes the first driving lines 41 labeled L1 and the second driving lines 42 labeled M1 located on the right side of the grating region G1. The corresponding second routing group R2 includes the first driving lines 41 labeled L1 and the second driving lines 42 labeled M1 located on the left side of the grating region G1.

[0206] exist Figure 14 , the plurality of driving lines 24 connected to the first common signal unit 237 on the upper side include a plurality of first driving lines 41 labeled L1 and a plurality of second driving lines 42 labeled M1. The corresponding first routing group R1 includes the first driving lines 41 labeled L1 and the second driving lines 42 labeled M1 located on the left side of the grating region G1. The corresponding second routing group R2 includes the first driving lines 41 labeled L1 and the second driving lines 42 labeled M1 located on the right side of the grating region G1.

[0207] Optionally, in order to fully utilize each driver chip 5 and facilitate design, as Figures 12 to 14 As shown, the number of driving lines included in the first routing group R1 is the same as the number of driving lines included in the second routing group R2.

[0208] Among them, the first routing group R1 (such as Figure 12 The first driving line L1 and the second driving line M1 below the middle grating area G1) and the second routing group R2 (such as Figure 12 The first driving line L1 and the second driving line M1 above the middle grating region G1 can be mirror-symmetrical. In addition, since the first routing group R1 and the second routing group R2 connect to different sub-electrodes, the first routing group R1 and the second routing group R2 can also be misaligned in the first direction.

[0209] In a specific implementation, the driving lines 24 in the first routing group R1 and the driving lines 24 in the second routing group R2 can be located in the same film layer (eg, Figures 12 to 13 ), or they can be located in different film layers (such as Figure 14 as shown, and described in detail below).

[0210] In a specific implementation, the signal input terminal can be provided on the same layer as the driving line 24 in the first routing group R1 or on a different layer. The signal input terminal can be provided on the same layer as the driving line 24 in the second routing group R2 or on a different layer.

[0211] Optionally, the first routing group R1 and the second routing group R2 may be connected to the same or different driver chips 5 , respectively.

[0212] like Figure 12 As shown, the first routing group R1 located below the grating region G1 is connected to one driver chip 5 , and the second routing group R2 located above the grating region G1 is connected to another driver chip 5 .

[0213] like Figure 13 As shown, the first routing group R1 located on the right side of the grating region G1 is connected to one driver chip 5 , and the second routing group R2 located on the left side of the grating region G1 is connected to another driver chip 5 .

[0214] like Figure 14 As shown, the first routing group R1 located on the left side of the grating region G1 and the second routing group R2 located on the right side of the grating region G1 are connected to the same driver chip 5. Specifically, the driving lines in the first routing group R1 and the driving lines in the second routing group R2 are first connected through vias before being connected to the signal input end, and then connected to the same driver chip 5.

[0215] Alternatively, as Figure 12 or Figure 13 As shown, the multiple sub-electrodes 25 include first sub-electrodes 33 and second sub-electrodes 34 alternately arranged along the first direction (OA direction), and the multiple first sub-electrodes 33 located in the same grating unit 20 are sorted along the first direction (OA direction), and the multiple second sub-electrodes 34 located in the same grating unit 20 are sorted along the first direction (OA direction).

[0216] like Figure 12 or Figure 13 As shown, multiple first sub-electrodes 33 are arranged along the first direction (OA direction) OA direction (the first sub-electrodes 33 with serial numbers 1, 2, 3...n are marked as t1, t2, t3...tn respectively), and multiple second sub-electrodes 34 are arranged along the first direction (OA direction) OA direction (the second sub-electrodes 34 with serial numbers 1, 2, 3...n are marked as d1, d2, d3...dn).

[0217] In order to further reduce the mutual interference between adjacent traces, such as Figure 12 or Figure 13 As shown, the odd-numbered first sub-electrodes 33 and the second sub-electrodes 34 are respectively connected to the driving lines 24 in the first routing group R1; the even-numbered first sub-electrodes 33 and the second sub-electrodes 34 are respectively connected to the driving lines 24 in the second routing group R2.

[0218] like Figure 12 or Figure 13 As shown, in each common signal unit 23, the first sub-electrodes 33 with odd numbers (for example, marked as t1, t3, t5, etc.) are connected to the first driving line 41 in the first routing group R1, and the first sub-electrodes 33 with even numbers (for example, marked as t2, t4, t6, etc.) are connected to the first driving line 41 in the second routing group R2.

[0219] like Figure 12 or Figure 13 As shown, in each common signal unit 23, the second sub-electrodes 34 with odd numbers (for example, marked as d1, d3, d5, etc.) are connected to the second driving line 42 in the first routing group R1, and the second sub-electrodes 34 with even numbers (for example, marked as d2, d4, d5, etc.) are connected to the second driving line 42 in the second routing group R2.

[0220] like Figure 12 or Figure 13 As shown, the first sub-electrode 33 and the second sub-electrode 34 respectively include opposite first ends ( Figure 12 The lower end of each sub-electrode 25, Figure 13 the right end of each sub-electrode 25) and the second end ( Figure 12 The upper end of each sub-electrode 25, Figure 13In each grating unit 20, the first ends of the odd-numbered first sub-electrodes 33 and the second sub-electrodes 34 extend to the non-grating area G2, and the second ends of the even-numbered first sub-electrodes 33 and the second sub-electrodes 34 extend to the non-grating area G2, thereby connecting the odd-numbered first sub-electrodes 33 to the first driving line 41 in the first routing group R1, and connecting the even-numbered first sub-electrodes 33 to the first driving line 41 in the second routing group R2. At the same time, the odd-numbered second sub-electrodes 34 are connected to the second driving line 42 in the first routing group R1, and the even-numbered second sub-electrodes 34 are connected to the second driving line 42 in the second routing group R2.

[0221] exist Figure 13 In the embodiment, each grating unit 20 includes 40 sub-electrodes, 20 of which extend to the left side of the grating region G1 (e.g. Figure 19 As shown), the other 20 sub-electrodes extend to the right side of the grating region G1 ( Figure 19 not shown).

[0222] Alternatively, as Figure 14 As shown, each sub-electrode 25 is connected to two driving lines 24 , and the two driving lines 24 are respectively located in the first routing group R1 and the second routing group R2 .

[0223] like Figure 14 As shown, both ends of each sub-electrode 25 extend to the non-grating area G2, that is, the left and right sides of the grating area G1, respectively. The part of the sub-electrode 25 extending to the left side of the grating area G1 is connected to the corresponding driving line 24 in the first routing group R1 through a via, and the part of the sub-electrode 25 extending to the right side of the grating area G1 is connected to the corresponding driving line 24 in the second routing group R2 through a via.

[0224] Since each sub-electrode 25 is connected to two driving lines 24 and the two driving lines 24 are located on opposite sides of the grating region G1, bilateral driving of the sub-electrode 25 can be achieved, thereby improving the driving capability of the sub-electrode 25 and shortening the charge and discharge time.

[0225] Figure 14 The design structure diagram at the dotted box E position can also be referred to Figure 19 The difference is that Figure 19 In the grating unit 20 shown, only 20 sub-electrodes extend to the left side of the grating region G1. Figure 14 The two ends of each sub-electrode in the grating unit 20 extend to the left and right sides of the grating region G1, respectively. That is, when the grating unit 20 includes 40 sub-electrodes (eg, Figure 19 As shown), the 40 sub-electrodes all extend to the left side of the grating region G1.

[0226] Among them, such as Figure 14 As shown, two driving lines 24 connected to the same sub-electrode 25 can be connected to the same signal input terminal. In this way, the signals input to the two driving lines 24 connected to the same sub-electrode 25 can be synchronized, shortening the charge and discharge time.

[0227] In a specific implementation, the first routing group R1 and the second routing group R2 can be located in different film layers. Figure 18 As shown, the routing layer 26 may further include: a first routing layer 51 , a third insulating layer 52 and a second routing layer 53 which are stacked.

[0228] like Figure 18 As shown, the driving line 24 and the signal input end in the first routing group R1 can be located in the first routing layer 51 and connected to each other, the driving line 24 in the second routing group R2 can be located in the second routing layer 53, and the two driving lines 24 connected to the same sub-electrode 25 are connected through vias in the non-grating area G2.

[0229] In a specific implementation, the plurality of driving lines 24 in the first routing group R1 can be connected to different signal input terminals respectively. Figure 14 As shown, the two driving lines 24 connected to the same sub-electrode 25 are connected between the grating region G1 and the signal input terminal through a via provided on the third insulating layer 52 , thereby ensuring that the two driving lines 24 connected to the same sub-electrode 25 are connected to the same signal input terminal.

[0230] Alternatively, as Figures 12 to 14 As shown, the sub-electrode 25 extends to the first side and / or the second side of the grating region G1 and is connected to the corresponding driving line 24 , and the signal input end is located at the third side of the grating region G1 .

[0231] The first side and the second side are both sides of the grating region G1 in the extending direction of the sub-electrode 25. The third side is a side different from the first side or the second side.

[0232] like Figure 12 As shown, the extension direction of the sub-electrode 25 is vertical, so the first side and the second side are the upper side and the lower side of the grating region G1, and accordingly, the third side can be the left side or the right side of the grating region G1.

[0233] like Figures 13 and 14 As shown, the extension direction of the sub-electrode 25 is horizontal, so the first side and the second side are the left and right sides of the grating region G1, and accordingly, the third side can be the upper side or the lower side of the grating region G1.

[0234] like Figure 12As shown, the odd-numbered first sub-electrodes 33 and the second sub-electrodes 34 extend to the lower side of the grating region G1, and the even-numbered first sub-electrodes 33 and the second sub-electrodes 34 extend to the upper side of the grating region G1, and the signal input end is located on the right side of the grating region G1.

[0235] like Figure 13 As shown, the odd-numbered first sub-electrodes 33 and the second sub-electrodes 34 extend to the right side of the grating region G1, and the even-numbered first sub-electrodes 33 and the second sub-electrodes 34 extend to the left side of the grating region G1, and the signal input end is located at the bottom side of the grating region G1.

[0236] like Figure 14 As shown, each sub-electrode 25 extends to the left and right sides of the grating region G1 , and the signal input end is located at the lower side of the grating region G1 .

[0237] Alternatively, as Figure 15 As shown, the interconnected driving line 24 and the signal input terminal are located on the same side of the grating region G1 , and the same side is any side of the grating region G1 in the extending direction of the sub-electrode 25 .

[0238] like Figure 15 As shown, the extension direction of the sub-electrode 25 is horizontal, so the interconnected driving line 24 and the signal input terminal can be located on the left or right side of the grating region G1.

[0239] exist Figure 15 In the embodiment, each sub-electrode 25 extends to the left side of the grating region G1 and is correspondingly connected to the driving line located on the left side of the grating region G1 , and the signal input end is also located on the left side of the grating region G1 .

[0240] Since the interconnected driving line 24 and the signal input terminal are located on the same side of the grating area G1, on the one hand, the length of the driving line 24 can be shortened, the square resistance can be reduced, the driving capability can be improved, and the charging and discharging time can be shortened; on the other hand, a narrow frame on three sides can be achieved.

[0241] Figure 15 The design structure diagram at the dotted box E position can also be referred to Figure 19 The difference is that Figure 19 In the grating unit 20 shown, only 20 sub-electrodes extend to the left side of the grating region G1. Figure 15 Each sub-electrode in the grating unit 20 shown in FIG. 1 extends to the left side of the grating region G1. That is, when the grating unit 20 includes 40 sub-electrodes (eg, Figure 19 As shown), the 40 sub-electrodes all extend to the left side of the grating region G1.

[0242] Optionally, multiple driving lines 24 are connected to different signal input terminals respectively, ensuring that different driving lines 24 can input different driving signals, which helps to achieve refined driving.

[0243] Optionally, in order to provide driving signals to the first driving line 41 and the second driving line 42 , the grating adjustment device 100 further includes at least one driving chip 5 .

[0244] exist Figures 11 to 15 In the embodiment, a plurality of signal input terminals are provided in the area covered by the driver chip 5. The signal input terminals are used to bind the driver chip 5, and the signal input terminals correspond to the channels of the driver chip 5 one by one.

[0245] The specific number of the driver chips 5 is not limited here. For example, Figure 2a As shown, a driver chip 5 is included, or Figures 11 to 15 As shown, the embodiment includes two driving chips 5. The driving chip 5 can be directly connected to the first driving line 41 and the second driving line 42 to provide a driving voltage signal. Figure 1 As shown, the grating adjustment device 100 further includes a Flexible Printed Circuit (FPC) 6 , and the driving chip 5 can be bound to the FPC 6 .

[0246] In one or more embodiments, in order to increase the light output of the grating adjustment device 100, the material of the second electrode layer 4, the first sub-electrode 33 and the second sub-electrode 34 includes a transparent conductive material. For example, the transparent conductive material may include a metal oxide such as indium tin oxide (ITO), or a metal material with higher transparency such as nano silver wire. The use of metal materials can reduce the square resistance.

[0247] It should be noted that in actual processes, due to limitations in process conditions or other factors, the similarities among the above-mentioned features may not be completely identical and may have some deviations. Therefore, as long as the similarities between the above-mentioned features generally meet the above-mentioned conditions, they are all within the scope of protection of this disclosure. For example, the above-mentioned similarities can be allowed within the allowable error range.

[0248] The present disclosure also provides a display device, such as Figure 1 As shown, it includes a display panel 200 and the above-mentioned grating adjustment device 100; the grating adjustment device 100 is arranged opposite to the display panel 200.

[0249] Those skilled in the art will appreciate that the display device has the advantages of the aforementioned grating adjustment device 100 and can achieve 3D display.

[0250] The grating adjustment device 100 can be arranged on the light-emitting side of the display panel 200. In this case, the grating adjustment device 100 can be called a front grating; or Figure 1As shown, the grating adjustment device 100 can be arranged on the backlight side of the display panel 200. In this case, the grating adjustment device 100 can be called a rear grating, which is not limited here.

[0251] The type of the display panel 200 is not limited, and its type can be a TN (Twisted Nematic) type, VA (Vertical Alignment) type, IPS (In-Plane Switching) type or ADS (Advanced Super Dimension Switch) type liquid crystal display panel 200, which is not limited here. In addition, if the display panel 200 is a liquid crystal display panel 200, the 3D display device may further include a backlight module to provide backlight. In the case where the grating adjustment device 100 is arranged on the backlight side of the display panel 200, the backlight module may be arranged on the backlight side of the grating adjustment device 100. Of course, in the case where the grating adjustment device 100 is arranged on the light-emitting side of the display panel 200, the backlight module may be arranged on the backlight side of the display panel 200.

[0252] The display device can significantly reduce the crosstalk phenomenon that occurs when the viewer moves, thereby significantly improving user experience and product quality.

[0253] Optionally, the display panel 200 includes a touch display panel 200, such as Figure 1 As shown, the grating adjustment device 100 is disposed on the backlight side of the display panel 200 ; this can avoid the influence of the grating adjustment device 100 on the touch effect, thereby improving the touch quality.

[0254] The touch display panel 200 may adopt TDDI (Touch and Display Integrated) touch technology. The touch structure is not limited here and can be obtained according to relevant technologies.

[0255] Optionally, in order to achieve a 3D display effect, such as Figure 1 As shown, the grating adjustment device 100 includes a grating area G1 and a non-grating area G2 located on at least one side of the grating area G1; the display panel 200 includes a display area AA and a non-display area BB located on at least one side of the display area AA; wherein the orthographic projection of the grating area G1 on the plane where the display panel is located covers the display area AA.

[0256] Alternatively, as Figure 11 As shown, in the grating area G1, multiple driving lines 24 are arranged along the second direction, and the positive projections of the driving lines 24 on the first substrate 1 intersect with the positive projections of the multiple sub-electrodes 25 on the first substrate 1, and the interconnected driving lines 24 and sub-electrodes 25 are connected by vias at the intersection of the two.

[0257] Accordingly, refer to Figure 20 and Figure 21 The display area includes a plurality of pixel opening areas arranged in an array along the row direction and the column direction, and a non-opening area surrounding each pixel opening area ( Figure 20 and Figure 21 In the row direction, the orthographic projection of the driving line 24 on the plane where the display panel is located is located within the pixel opening area, or the orthographic projection of the driving line 24 on the plane where the display panel is located is located within the non-opening area.

[0258] like Figure 20 As shown, the orthographic projection of the driving line 24 on the plane of the display panel is located within the pixel opening area, that is, the orthographic projection of the driving line 24 on the display panel 200 passes through multiple pixel opening areas along the column direction. This arrangement can reduce the bonding accuracy requirements between the grating adjustment device 100 and the display panel 200.

[0259] like Figure 21 As shown, the orthographic projection of the drive line 24 on the plane where the display panel is located is located within the non-opening area. For example, the orthographic projection of the drive line 24 on the display panel 200 can be located within the range of the data line. The data line is used to transmit display signals to control the opening of each pixel to emit light or not. By setting the orthographic projection of the drive line 24 on the plane where the display panel 200 is located to be within the non-opening area, the aperture ratio can be improved. In this case, the second transfer pattern P2, the third transfer pattern P3 and the virtual transfer pattern P0 on the drive line 24 can be canceled.

[0260] In the actual process, in order to ensure that the orthographic projection of the driving line 24 on the plane where the display panel 200 is located is within the range of the data line, the fitting accuracy between the grating adjustment device 100 and the display panel 200 can be controlled within 5 μm to avoid affecting the aperture ratio.

[0261] Optionally, the display device further includes a light bar disposed on the backlight side of the display panel. The orthographic projection of the light bar on the plane where the display panel is located, and the orthographic projections of the interconnected drive lines 24 and signal input terminals on the plane where the display panel is located, are all located on the same side of the display area, and the same side is defined as either side of the display area in the extension direction of the sub-electrodes 25.

[0262] Since the interconnected driving lines 24 and the signal input terminal are located on the same side of the display area (left or right), corresponding to the long side of the display area, by placing the light bar on the long side (on the long side where the signal input terminal is located or on the opposite side), the number of LED lights in the light bar can be increased, thereby improving the brightness of the display device.

[0263] The display area of the display panel 200 is used to set pixels to achieve display; the non-display area is used to set driving circuits, etc.

[0264] Alternatively, to simplify the process, Figure 1 As shown, the grating adjustment device 100 includes a first substrate 1 and a second substrate 2 arranged oppositely, and the display panel 200 includes a third substrate 9 and a fourth substrate 10 arranged oppositely; the second substrate 2 is attached to the third substrate 9, and for example, Figure 1 In addition, in order to avoid the influence of external stray light, as shown in the double-sided tape 13. Figure 1 As shown, a first polarizing layer 16 may be further provided on the outer side of the first substrate 1 of the grating adjustment device 100. If the display panel 200 is a liquid crystal display panel 200, then Figure 1 As shown, the display panel 200 may further include a second polarizing layer 11 and a third polarizing layer 12 , wherein the second polarizing layer 11 is arranged on a side of the third substrate 9 close to the second substrate 2 , and the third polarizing layer 12 is arranged on a side of the fourth substrate 10 away from the third substrate 9 .

[0265] Of course, if Figure 1 As shown, the display panel 200 may further include a color filter layer 17, a first sealant 15, a driver chip 57, and a circuit board 8; the grating adjustment device 100 may further include a second sealant 14. Only the content related to the invention is described here; the remaining structures can be obtained by referring to related technologies.

[0266] Optionally, in order to track the movement of the human eye in real time, the 3D display device further includes a shooting unit, and the grating adjustment device 100 is connected to the shooting unit and is configured to adjust the opening position and / or aperture ratio of the grating unit 20 of the grating adjustment device 100 according to the shooting information of the shooting unit.

[0267] The above-mentioned shooting unit may include a camera. The grating adjustment device 100 can analyze information such as the position of the human eye based on the shooting information of the shooting unit and relevant eye tracking technology, and adjust the opening position and / or aperture ratio of the grating unit 20 in real time to match the viewpoint position after movement as much as possible, thereby reducing the crosstalk phenomenon that occurs during the movement process and improving user experience and product quality.

[0268] The present disclosure also provides a 3D display device, such as Figure 1 As shown, it includes a display panel 200 and the above-mentioned grating adjustment device 100; the grating adjustment device 100 is arranged opposite to the display panel 200.

[0269] Those skilled in the art will appreciate that the 3D display device has the advantages of the grating adjustment device 100 and can achieve 3D display. The 3D display device can significantly reduce crosstalk during movement, thereby significantly improving user experience and product quality.

[0270] In addition, the use of a grating adjustment device to form a 3D display device has the advantage of being able to freely switch between 2D display and 3D display, and during 2D display, the grating unit in the grating adjustment device is in a light-transmitting state, which has little effect on the 2D display transmittance.

[0271] The grating adjustment device can be arranged on the light-emitting side of the display panel. In this case, the grating adjustment device can be called a front grating; or Figure 1 As shown, the grating adjustment device 100 can be arranged on the backlight side of the display panel 200. In this case, the grating adjustment device can be called a rear grating, which is not limited here.

[0272] The type of the display panel is not limited, and its type can be a TN (Twisted Nematic) type, VA (Vertical Alignment) type, IPS (In-Plane Switching) type or ADS (Advanced Super Dimension Switch) type liquid crystal display panel, which is not limited here. In addition, if the display panel is a liquid crystal display panel, the 3D display device may also include a backlight module to provide backlight. In the case where the grating adjustment device is arranged on the backlight side of the display panel, the backlight module can be arranged on the backlight side of the grating adjustment device. Of course, in the case where the grating adjustment device is arranged on the light-emitting side of the display panel, the backlight module can be arranged on the backlight side of the display panel.

[0273] Optionally, the 3D display device includes an eye tracking module configured to obtain the viewing distance. Accordingly, the grating adjustment device 100 may also be connected to the eye tracking module and further configured to adjust the opening position and / or aperture ratio of the grating unit according to the viewing distance.

[0274] The above-mentioned eye tracking module may include a camera, and the grating adjustment device can analyze information such as the eye position based on the shooting information of the eye tracking module and relevant eye tracking technology, so as to obtain the viewing distance based on information such as the eye position, and adjust the opening position and / or opening rate of the grating unit in real time to match the viewpoint position after movement as much as possible, thereby reducing the crosstalk phenomenon that occurs during the movement and improving user experience and product quality.

[0275] In the present disclosure, “a plurality of” means two or more, and “at least one” means one or more, unless otherwise clearly defined.

[0276] In the present disclosure, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure 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 operate in a specific orientation. Therefore, it should not be understood as a limitation on the present disclosure.

[0277] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

[0278] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, product, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, product, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, product, or apparatus comprising the element.

[0279] The grating adjustment device and display device provided by the present disclosure are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core idea of the present disclosure.

[0280] 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.

[0281] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0282] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0283] This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A grating adjustment device, comprising: A first substrate, a conductive layer, a dielectric layer, and a second substrate are stacked, wherein the conductive layer includes a wiring layer, a first insulating layer, and a first electrode layer, the wiring layer includes a plurality of driving lines, and the first electrode layer includes a plurality of sub-electrodes arranged along a first direction; The driving lines are connected to the signal input terminal and the sub-electrodes respectively, and are used to transmit the driving signal input from the signal input terminal to the sub-electrodes. The sub-electrodes are used to drive the dielectric layer at the corresponding position to be light-transmissive or light-impermeable under the action of the driving signal. The grating adjustment device includes a grating area, the grating area includes a plurality of common signal units, the common signal unit includes a plurality of grating units, the grating unit includes a plurality of sub-electrodes, and the plurality of sub-electrodes located in the same grating unit are respectively connected to different driving lines; Multiple sub-electrodes located in the same grating unit are arranged along the first direction, and sub-electrodes located in different grating units of the same common signal unit and having the same sequence number are connected to the same driving line; the common signal units are adjusted respectively; The sub-electrodes are used to drive the dielectric layer at the corresponding position to be light-transmissive or light-impermeable under the action of the driving signal, including: forming the grating unit into a light-transmissive unit and a light-shielding unit.

2. The grating adjustment device according to claim 1, wherein: In the grating area, a plurality of driving lines are arranged along the second direction, and orthographic projections of the driving lines on the first substrate intersect with orthographic projections of a plurality of sub-electrodes on the first substrate.

3. The grating adjustment device according to claim 2, wherein: The common signal unit includes a plurality of grating units, and the driving line includes a plurality of first transfer patterns; A plurality of sub-electrodes located in the same common signal unit and having the same serial number are respectively connected to different first transfer patterns on the same driving line through via holes.

4. The grating adjustment device according to claim 2, wherein: The routing layer further includes at least one auxiliary line, the auxiliary line is insulated from each of the sub-electrodes, and in the grating area, the at least one auxiliary line is arranged along the second direction.

5. The grating adjustment device according to claim 4, wherein: The auxiliary lines and the driving lines are parallel to each other in the grating area; and / or, The auxiliary line is located between at least two adjacent driving lines; and / or, The auxiliary lines are respectively located on two opposite sides of the plurality of driving lines; and / or, The multiple common signal units include an adjacent first common signal unit and a second common signal unit, the multiple driving lines connected to the first common signal unit are a first routing unit, the multiple driving lines connected to the second common signal unit are a second routing unit, and the auxiliary line is located between the first routing unit and the second routing unit.

6. The grating adjustment device according to claim 4, wherein: The auxiliary line and the driving line located on one side of the auxiliary line have the same pattern in the grating area.

7. The grating adjustment device according to any one of claims 4 to 6, wherein: The auxiliary line is connected to a fixed voltage input terminal, and the fixed voltage input terminal is used to transmit a fixed voltage signal to the auxiliary line.

8. The grating adjustment device according to any one of claims 3 to 6, wherein: The plurality of common signal units include a third common signal unit and a fourth common signal unit, the plurality of driving lines connected to the third common signal unit are a third routing unit, and the plurality of driving lines connected to the fourth common signal unit are a fourth routing unit; The driving line in the third routing unit includes a second transfer pattern, a plurality of second transfer patterns on the third routing unit and a plurality of first transfer patterns on the fourth routing unit are mutually translated in the second direction, and the second transfer pattern is insulated from each of the sub-electrodes; The driving line in the fourth routing unit includes a third transfer pattern. The multiple third transfer patterns located on the fourth routing unit and the multiple first transfer patterns located on the third routing unit are in a translation relationship with each other in the second direction. The third transfer patterns are insulated from each of the sub-electrodes.

9. The grating adjustment device according to any one of claims 2 to 6, wherein: The first electrode layer includes: a first sub-electrode layer, a second insulating layer, and a second sub-electrode layer that are stacked, and the first sub-electrode layer is located between the first insulating layer and the second insulating layer; The plurality of sub-electrodes include a plurality of first sub-electrodes arranged along a first direction, and a plurality of second sub-electrodes arranged along the first direction, wherein orthographic projections of the first sub-electrodes on the first substrate and orthographic projections of the second sub-electrodes on the first substrate are alternately arranged; The plurality of first sub-electrodes are located in the first sub-electrode layer, and the first sub-electrodes are connected to the driving lines through first via holes provided on the first insulating layer; the plurality of second sub-electrodes are located in the second sub-electrode layer, and the second sub-electrodes are connected to the driving lines through second via holes provided on the first insulating layer and the second insulating layer; The first sub-electrode includes a bent portion, which is bent toward a side away from the second via hole to form a avoidance area for avoiding the second via hole.

10. The grating adjustment device according to any one of claims 2 to 6, wherein: The signal input end is located on either side of the grating area in the first direction.

11. The grating adjustment device according to claim 1, wherein: The grating adjustment device further includes a non-grating area located on at least one side of the grating area; The plurality of driving lines are located in the non-grating area, the sub-electrodes extend to the non-grating area, and are connected to the corresponding driving lines through via holes in the non-grating area.

12. The grating adjustment device according to claim 11, wherein: The plurality of common signal units include a fifth common signal unit and a sixth common signal unit, wherein the sixth common signal unit is any one of the common signal units located on a side of the fifth common signal unit close to the signal input end; An orthographic projection of a driving line connected to the fifth common signal unit on the first substrate intersects with an orthographic projection of at least one sub-electrode in the sixth common signal unit on the first substrate.

13. The grating adjustment device according to claim 11, wherein: The plurality of common signal units include a seventh common signal unit and an eighth common signal unit, and the eighth common signal unit is any one of the plurality of common signal units except the seventh common signal unit; An orthographic projection of the driving line connected to the seventh common signal unit on the first substrate does not overlap with an orthographic projection of the sub-electrode in the eighth common signal unit on the first substrate.

14. The grating adjustment device according to claim 13, wherein: The driving line includes an extension line and a bending line, the extension direction of the extension line is the first direction, the extension line is connected to the sub-electrodes with the same serial number and located in the same common signal unit through a via, one end of the bending line is connected to the extension line, and the other end is connected to the signal input end, and the orthographic projection of the bending line on the first substrate does not overlap with the orthographic projection of the multiple sub-electrodes on the first substrate.

15. The grating adjustment device according to claim 14, wherein: The bending line is located on a side of the extension line away from the grating region.

16. The grating adjustment device according to any one of claims 11 to 15, wherein: A plurality of driving lines connected to the same common signal unit are divided into a first routing group and a second routing group, and the first routing group and the second routing group are respectively located on two opposite sides of the grating area.

17. The grating adjustment device according to claim 16, wherein: The plurality of sub-electrodes include first sub-electrodes and second sub-electrodes alternately arranged along a first direction, the plurality of first sub-electrodes located in the same grating unit are arranged along the first direction, and the plurality of second sub-electrodes located in the same grating unit are arranged along the first direction; Among them, the first sub-electrodes and the second sub-electrodes with odd numbers are respectively connected to the driving lines in the first routing group; the first sub-electrodes and the second sub-electrodes with even numbers are respectively connected to the driving lines in the second routing group.

18. The grating adjustment device according to claim 16, wherein: Each of the sub-electrodes is connected to two driving lines, and the two driving lines are respectively located in the first routing group and the second routing group.

19. The grating adjustment device according to claim 18, wherein: Two driving lines connected to the same sub-electrode are connected to the same signal input terminal.

20. The grating adjustment device according to claim 18, wherein: The first routing group and the second routing group are located in different film layers.

21. The grating adjustment device according to claim 20, wherein: The routing layer comprises: a first routing layer, a third insulating layer and a second routing layer which are stacked; Among them, the driving lines in the first routing group and the signal input end are both located in the first routing layer and connected to each other, the driving lines in the second routing group are located in the second routing layer, and the two driving lines connected to the same sub-electrode are connected through vias in the non-grating area.

22. The grating adjustment device according to any one of claims 1 to 6, wherein: The sub-electrode extends to the first side and / or the second side of the grating region, and the signal input end is located at the third side of the grating region.

23. The grating adjustment device according to any one of claims 1 to 6, wherein: The interconnected driving lines and signal input terminals are located on the same side of the grating region, and the same side is any side of the grating region in the extending direction of the sub-electrode.

24. The grating adjustment device according to any one of claims 1 to 6, wherein: The plurality of driving lines are respectively connected to different signal input terminals.

25. A display device comprising: A display panel and the grating adjustment device according to any one of claims 1 to 24, wherein the grating adjustment device is located on the light-emitting side or the backlight side of the display panel.

26. The display device according to claim 25, wherein The display panel includes a display area and a non-display area located on at least one side of the display area; The orthographic projection of the grating area on the plane where the display panel is located covers the display area.

27. The display device according to claim 26, wherein: In the grating area, a plurality of driving lines are arranged along a second direction, and orthographic projections of the driving lines on the first substrate intersect with orthographic projections of a plurality of sub-electrodes on the first substrate; The display area includes a plurality of pixel opening areas arranged in an array along the row direction and the column direction, and a non-opening area surrounding each of the pixel opening areas; In the row direction, the orthographic projection of the driving line on the plane where the display panel is located is located within the pixel opening area, or the orthographic projection of the driving line on the plane where the display panel is located is located within the non-opening area.

28. The display device according to claim 26, wherein The display device further includes: a light bar, arranged on the backlight side of the display panel; In which, the orthographic projection of the light bar on the plane where the display panel is located, and the orthographic projections of the interconnected driving lines and signal input ends on the plane where the display panel is located are all located on the same side of the display area, and the same side is any side of the display area in the extension direction of the sub-electrode.

29. A 3D display device, comprising: A display panel and the grating adjustment device according to any one of claims 1 to 24, wherein the grating adjustment device is arranged opposite to the display panel.

30. The 3D display device according to claim 29, wherein: The 3D display device further includes: an eye tracking module configured to obtain viewing distance; The grating adjustment device is also connected to the eye tracking module and is further configured to adjust the opening position and / or aperture ratio of the grating unit according to the viewing distance.

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