Single-screen display system with multiple 2D image projection areas

Abstract

The invention discloses a single-screen display system for multiple 2D image projection areas. The single-screen display system comprises a display screen composed of basic display units and a spectro-grating composed of grating units. Respectively projecting light information to different projection areas through a grating unit and corresponding basic display units which are arranged at intervals; the adjacent grating units respectively allow different orthogonal characteristic light to pass through, and each basic display unit only projects the orthogonal characteristic light allowed to pass through by the corresponding grating unit; a two-dimensional (2D) image corresponding to a projection area is projected through each grating unit of the spectro-grating and a basic display unit corresponding to the projection area. Different projection areas correspond to different 2D images.

Description

Technical Field

[0001] This invention relates to the technical field of projecting multiple 2D images onto different projection areas using a single display screen, and more specifically to a single-screen display system with multiple 2D image projection areas. In each projection area, a corresponding 2D image is projected, and low-noise display is achieved by utilizing orthogonal design characteristics. Background Technology

[0002] With the widespread application of displays, various application demands have emerged. Among them, multi-screen display technology, which projects different 2D images to different areas through a single screen, can expand the application scenarios of displays and has rapidly developed in fields such as automotive. Existing multi-screen displays use a beam splitter to guide different basic display unit groups on the display screen to project their respective two-dimensional (2D) images to their corresponding projection areas. That is, each basic display unit projects light information to its corresponding projection area through a corresponding grating unit in the beam splitter; each projection area receives the 2D image projected by its corresponding basic display unit. During this process, adjacent basic display units project light information to different projection areas through the same corresponding grating unit; along the grating unit arrangement direction, crosstalk noise between the projected light from adjacent basic display units severely affects the display effect. Although the noise can be reduced by turning off some basic display units, this results in a loss of display resolution utilization.

[0003] By employing feasible technical means, while ensuring that the display resolution is fully utilized, crosstalk noise between the projected light of adjacent basic display units can be effectively suppressed, thereby significantly improving the display effect and making it highly valuable for application. Summary of the Invention

[0004] This invention proposes a single-screen display system with multiple 2D image projection areas. The system designs each grating unit to be arranged with a specific number of basic display units at intervals. By utilizing the characteristic that adjacent grating units can only allow light with different orthogonal characteristics to pass through, the system reduces crosstalk noise caused by light emitted from non-corresponding grating units, thereby effectively improving the display quality of multiple displays on one screen.

[0005] This invention provides the following solution: a single-screen display system with multiple 2D image projection areas, comprising: The display screen includes multiple basic display units capable of projecting light information, wherein the basic display unit is the smallest area light-emitting structure that projects light information. A beam-splitting grating, positioned corresponding to the display screen, is composed of multiple grating units arranged along the one-dimensional grating unit arrangement direction. Furthermore, along the arrangement direction of the grating units, corresponding to any grating unit... N b Each basic display unit, spaced apartn × N b The basic display units are discretely arranged, where positive integers N b ≥2, positive integer n ≥1; Among them, adjacent O Each grating unit, in a one-to-one correspondence, allows only distinct elements from each other. O A basic display unit with orthogonal characteristic light passes through a certain type of light, and corresponding to the same grating unit, emits only the corresponding orthogonal characteristic light allowed to pass through that grating unit, wherein the integer... O ≥2; A control unit, which is connected to the display screen, is used to control the loading of light information by each basic display unit of the display screen; The single-screen display system for the multiple 2D image projection areas is configured such that, along the arrangement direction of the grating units, the intervals are (…). N b -1) Each of the basic display units of the basic display units projects a beam onto the same projection area through its corresponding grating unit, and the control unit controls each basic display unit corresponding to any projection area to load the corresponding 2D image.

[0006] In the above scheme, by setting along the arrangement direction of the grating units, corresponding to any grating unit... N b Each basic display unit, spaced apart n × N b The basic display units are arranged discretely, and the crosstalk noise caused by light emitted from non-corresponding grating units is reduced by utilizing the characteristic that adjacent grating units only allow light with different orthogonal characteristics to pass through, thereby effectively improving the display quality of multiple displays on one screen.

[0007] Preferably, the grating unit of the beam splitter is a slit, a cylindrical lens, or a micro / nano structure device.

[0008] Preferably, the orthogonal characteristic is a polarization orthogonal characteristic, or / and a color orthogonal characteristic, or / and a time orthogonal characteristic, or a mixed orthogonal characteristic formed by combining different orthogonal characteristics.

[0009] Preferably, the beam splitter is a controllable beam splitter connected to a control unit, which can controllably adjust the parameters of the beam splitter under the control of the control unit. The parameters of the beam splitter include the position of the grating unit and / or the focal length of the grating unit.

[0010] Preferably, the single-screen display system with multiple 2D image projection areas further includes a tracking unit, which is connected to the control unit and, driven by the control unit, acquires the position of the observer's pupil in real time. The control unit can adjust the beam splitter parameters according to the position of the observer's pupil and control the display screen to refresh the display, so as to achieve tracking coverage of the observer's pupil by the projection area.

[0011] Preferably, at different time points within any time period, the beam splitter can be sequentially presented with multiple parameter states under the control of the control unit; or, under the control of the control unit, the beam splitter can be adjusted to a failure state as needed to implement 2D display of only one continuous projection area.

[0012] Preferably, the basic display unit of the display screen is a single sub-pixel, or a full-color basic display unit composed of different sub-pixels emitting different colors of light superimposed on each other, or an aperture with different colors of backlight incident in sequence.

[0013] Preferably, the single-screen display system with multiple 2D image projection areas further includes a diffuser to diffuse the light emitted from each grating unit.

[0014] Preferably, the single-screen display system with multiple 2D image projection areas further includes an aperture array composed of light-transmitting apertures, wherein each light-transmitting aperture in the aperture array corresponds one-to-one with each grating unit of the beam-splitting grating, constraining or adjusting the light-transmitting area of ​​each grating unit under the control of the control unit. Further, each light-transmitting aperture may include more than one time-sequentially opened sub-aperture, and the control unit controls the synchronous refresh display of each basic display unit. More preferably, the single-screen display system with multiple 2D image projection areas further includes a diffuser, which scatters the light emitted from each grating unit at least along the arrangement direction of the grating units.

[0015] Preferably, the display screen is a passive light-emitting display device, and the backlight unit connected to the control unit illuminates at various time periods. T During a time period, backlights of different directions are projected onto the display screen in different time sequences. The control unit controls each basic display unit to synchronously refresh the display. (The integer part is missing from the original text.) T ≥ 2. More preferably, the single-screen display system with multiple 2D image projection areas further includes a diffuser, which scatters the light emitted from each grating unit at least along the arrangement direction of the grating units.

[0016] The present invention also provides the following solutions: A single-screen display system with multiple 2D image projection areas, including: The display screen includes multiple splicing display units capable of projecting light information. Each splicing display unit is a structure that emits full-color light, formed by splicing together more than one light-emitting structural surface. A beam-splitting grating, positioned corresponding to the display screen, is composed of multiple grating units arranged along the one-dimensional grating unit arrangement direction. Furthermore, along the arrangement direction of the grating units, corresponding to any grating unit... N b Each display unit is arranged in a single unit, with intervals between them. n × N b The composite display units are discretely arranged, where positive integers N b ≥2, integer n ≥1; Among them, adjacent O Each grating unit, in a one-to-one correspondence, allows for different... O Orthogonal characteristic light passes through, and a display unit corresponding to the same grating unit emits only the orthogonal characteristic light corresponding to that grating unit, wherein integers O ≥2; A control unit, which is connected to the display screen, is used to control the loading of light information by each splicing display unit of the display screen; The single-screen display system for the multiple 2D image projection areas is configured such that, along the arrangement direction of the grating units, the intervals are (…). N b -1) Each of the three combined display units projects a beam of light, larger than the binoculars of the observer, onto the same projection area via its corresponding grating unit. Furthermore, the control unit controls each projection area to load a corresponding 2D image onto each splicing display unit.

[0017] Compared with the prior art, the beneficial effects of the technical solution of the present invention are: This invention introduces orthogonal characteristics, setting adjacent grating units to allow the passage of light with different orthogonal characteristics. Combined with the spacing arrangement of each grating unit corresponding to the basic display unit, it effectively reduces crosstalk noise caused by the basic display unit emitting light through non-corresponding grating units. Based on a single display screen, high-quality 2D images are projected onto multiple projection areas.

[0018] Details of the embodiments of the present invention are set forth in the accompanying drawings or in the following description. Other features, objects, and advantages of the invention will become more apparent from the following description and drawings. Attached Figure Description

[0019] The accompanying drawings are provided to aid in a better understanding of the invention and are also part of this specification. These drawings, which illustrate embodiments, and the description together serve to explain the principles of the invention.

[0020] Figure 1 yes OA schematic diagram illustrating the optical structure of a single-screen display system with multiple 2D image projection areas in Embodiment 1 of the present invention when the number of projection areas is 2.

[0021] Figure 2 In Example 1, it is O A schematic diagram illustrating the correspondence between the basic display unit and the raster unit when the ratio is 2. Figure (a) shows... N b =2 and n In the case where =1, (b) shows N b =2 and n In the case of =2, (c) shows... N b =3 and n =1.

[0022] Figure 3 yes O A schematic diagram illustrating the optical structure of a single-screen display system with multiple 2D image projection areas in Embodiment 1 of the present invention, under condition =3.

[0023] Figure 4 for O A schematic diagram illustrating the correspondence between the basic display unit and the grating unit in Embodiment 1 of the present invention under condition =3, wherein (a) in the figure shows N b =2 and n In the case where =1, (b) shows N b =2 and n In the case of =2, (c) shows... N b =3 and n =1.

[0024] Figure 5 This is a schematic diagram of Example 1, which shows that the basic display unit arrangement direction and the grating unit arrangement direction are the same in Embodiment 1 of the present invention.

[0025] Figure 6 This is a schematic diagram of Example 2, where the basic display unit arrangement direction and the grating unit arrangement direction are the same in Embodiment 1 of the present invention.

[0026] Figure 7 This is a schematic diagram of Example 1, which shows that the basic display unit arrangement direction and the grating unit arrangement direction are inconsistent in Embodiment 1 of the present invention.

[0027] Figure 8 This is a schematic diagram of Example 2, which shows that the basic display unit arrangement direction and the grating unit arrangement direction are inconsistent in Embodiment 1 of the present invention.

[0028] Figure 9This is a schematic diagram of the optical structure of a single-screen display system with multiple 2D image projection areas incorporating an aperture array, as shown in Embodiment 1 of the present invention. Figure 10 This is a schematic diagram of the optical structure of a single-screen display system with multiple 2D image projection areas and sub-apertures introduced in Embodiment 1 of the present invention.

[0029] Figure 11 This is a schematic diagram of the optical structure of a single-screen display system with multiple 2D image projection areas that incorporates time-series backlighting in Embodiment 1 of the present invention.

[0030] Figure 12 This is a schematic diagram of the optical structure of a display system in the case of a combined display unit in Embodiment 2 of the present invention. Detailed Implementation

[0031] The present invention provides a single-screen display system with multiple 2D image projection areas. It uses a beam splitter grating 20 and a display screen 10 with orthogonal properties as core components. The basic display units corresponding to each grating unit of the beam splitter grating 20 are arranged at intervals to effectively suppress crosstalk noise and achieve low-noise multi-screen display.

[0032] Example 1 Figure 1 The basic optical structure of a single-screen display system with multiple 2D image projection areas includes a display screen 10, a beam splitter 20 placed corresponding to the display screen 10, and a control unit 30. The display screen 10 is composed of basic display units that can project light information. In this invention, a basic display unit refers to the smallest surface structure that can independently display light information, such as a single sub-pixel emitting a single color light, or a stacked structure emitting full-color light composed of multiple sub-pixels emitting different colors of light. Specifically, each sub-pixel arranged in the surface of a conventional display can be directly used as a basic display unit; or a stacked pixel emitting colored light, formed by stacking sub-pixels along a direction perpendicular to the display surface, can be used as a basic display unit, such as a light-emitting structure based on chip stacking technology, composed of stacked R (red), G (green), and B (blue) light-emitting units. For example, an aperture with different colored backlights incident sequentially and whose emissivity can be synchronously adjusted can be used as a basic display unit. The light propagation direction along the display screen 10 is as follows: z The beam splitter 20 is at a distance d Placed in front of the display screen 10; the beam-splitting grating 20, along a one-dimensional direction x The direction is formed by grating units arranged together. Figure 1 For example, the slit is a grating unit, and its grating unit is along... x Slits g1, g2, g3, g4, g5, g6, ... are arranged in a directional pattern. The spacing between adjacent grating units along the arrangement direction is... Δ g, the aperture size of the grating unit is β×Δg, where β This represents the fill factor for the grating unit. Adjacent... O≥ Two grating units, each corresponding to another, allow for... O Orthogonal light passes through. Figure 1 by O Taking two types of orthogonal characteristic light, "•" light and "-" light, as an example. Specifically, grating units g1, g3, g5, ... allow only "-" light to pass through, blocking "•" light; grating units g2, g4, g6, ... allow only "•" light to pass through, blocking "-" light. The "blocking" mentioned here is not a strict 100% blocking, but rather refers to the blocking of leaked light as noise within the acceptable range of display quality. This is along the arrangement direction of the grating units. x Towards, basic display unit U 1. U 2. U 3. U 4. U 5… interval Δp Arranged, the luminous size of a single basic display unit is α×Δp ,in α The fill factor for the basic display unit. The fill factor corresponding to each raster unit. N b A basic display unit, with ( n × N b The basic display units are arranged at intervals, where positive integers are... N b ≥2, positive integer n ≥1. Figure 1 by N b =2、 n Taking =1 as an example. Specifically, for example, grating unit g7 corresponds to... N b =2 basic display units U 10 , U 13 interval n × N b =2 basic display units U 11 and U 12 Basic display unit U 10 , U 13 The emitted light is allowed to pass through the grating unit g7, and the spacing between them is basically the display unit. U 11 and U 12The emitted light is blocked by the "•" symbol from grating unit g7; grating unit g8 corresponds to... N b =2 basic display units U 12 , U 15 interval n × N b =2 basic display units U 13 and U 14 Basic display unit U 12 , U 15 The emitted light is allowed to pass through the grating unit g8, and the spacing between them is basically the display unit. U 13 and U 14 The emitted "-" light is blocked by grating unit g8; grating unit g9 corresponds to... N b =2 basic display units U 14 , U 17 interval n × N b =2 basic display units U 15 and U 16 Basic display unit U 14 , U 17 The emitted light is allowed to pass through the grating unit g9, and the spacing between them is basically the display unit. U 15 and U 16 The emitted light is blocked by the "•" shape of the grating unit g9; other grating units correspond to the basic display units, and so on, following the same pattern. Therefore, O =2 and N b Under the condition of =2, along x In each adjacent basic display unit, the same orthogonal characteristic light is emitted; in each of the four adjacent basic display units, the same orthogonal characteristic light is emitted. O = 2 types of orthogonal light characteristics.

[0033] according to Figure 1 The geometric relationships shown hold under the following conditions: D I / D= (n × N b +1 )× Δp / d (1), interval N b -1 = 1 basic display unit. Basic display units are grouped together, and each basic display unit converges to the same corresponding projection area via its corresponding grating unit. Among them... D I The distance between the projection areas. D The distance between the beam splitter grating 20 and the plane containing the projection area. d The spacing between the basic display unit and the beam splitter 20. Specifically, the basic display unit... U 1. U 3. U 5. U 7. U 9. U 11 , U 13 ... respectively passed through grating units g 1. g 2. g 3. g 4. g 5. g 6. g 7. ..., projecting a beam of light to... C Projection area 1 centered on point 1; basic display unit U 2. U 4. U 6. U 8. U 10 , U 12 ... respectively passed through grating units g 3. g 4. g 5. g 6. g 7. g 8. ..., projecting a beam of light to... C Projection area 2 is centered at point 2. Note that the raster units at the edges may correspond to fewer than the number of basic display units. N b indivual. Figure 1 In this context, the central ray of light projected from any basic display unit, passing through the corresponding grating unit, and projected onto the corresponding projection area is represented by the line connecting the center of the basic display unit and the center of the corresponding grating unit. C Point 1 is the intersection of the center rays of all basic display units corresponding to projection area 1. C2 represents the intersection point of the center rays of all the basic display units corresponding to projection area 2. In reality, the center rays of all the basic display units corresponding to a projection area are not strictly required to intersect at a single point. Figure 1 In this diagram, the center of any grating cell is represented by a point, for example, the center point of grating cell g6. C g6 grating unit g 12 center point C g12 For clarity of illustration, Figure 1 Only the center point of grating unit g6 is marked. C g6 and grating unit g 12 center point C g12 The center points of the other grating units are named in the same way. Figure 1 For clarity, only some of the basic display units and some of the raster units are shown, and only some of these basic display units and raster units are labeled. The names of the other basic display units or raster units can be determined sequentially based on the relative positions of the labeled basic display units or raster units.

[0034] The light emitted from any basic display unit passes through the light emitted from the corresponding grating unit and covers the corresponding projection area at a certain divergence angle. Figure 1 Taking a slit grating as an example, along x Orientation, without considering diffraction effects, for any basic display unit U 1 via the corresponding grating unit g 1. The divergence angle of the emitted light is the basic display unit. U 1 edge point M U1 , M' U1 and grating unit g 1 edge point M g1 , M' g1 The angle between the intersecting lines covers the area of ​​projection region 1. M 1 M' 1. Among them, M 1 is a connection. M' U1 M g1 The intersection of the projection area; M' 1 is a connection. M U1 M' g1 The intersection of the projection area and the projection area. The range of projection area 2. M 2M' Similarly, we can obtain the result. Figure 1 For clarity, only a single element is shown in the diagram. U 1 and grating unit g The edge points of unit 1 are labeled, and the edge points of other basic display units and raster units are named similarly. Along the arrangement direction of the raster units, the luminous size of each basic display unit is represented by... α×Δp This indicates that the light emission size of each grating unit is represented by... β× Δg This indicates that, without considering diffraction effects, the size of the projection area... D s Determined according to the following formulas: d 1 / d 2 = ( α×Δp ) / ( β×Δg (2), d 1+ d 2 =d (3) D s / ( β×Δg ) = ( d 2 +D ) / d 2(4).

[0035] in, d 1. d 2 are respectively R Dots and basic display units U 1. Grating unit g The spacing of 1, such as Figure 1 . R A dot is a display unit U 1 edge point M U1 , M' U1 and grating unit g 1 edge point M g1 , M' g1 The intersection of the intersecting lines. In reality, considering the diffraction effect of the grating unit aperture, the actual size of the projection area can be larger than the above. D s The optimal arrangement is for adjacent projection areas to be exactly adjacent to each other. Figure 1 In the diagram, for simplicity and clarity, the fill factor of the basic display unit is used. α= 1. For example 。 Figure 1A slit is used as the grating unit. In practice, the grating unit can also be a convex cylindrical lens with a positive focal length, or a concave cylindrical lens with a negative focal length, or even a micro / nano structure device, such as a micro / nano structure device with a cylindrical lens function. Along the light transmission direction, a diffuser 60 can also be placed in front of the beam splitter grating; when the divergence angle of the light projected by each basic display unit through the corresponding grating unit is not large enough, it is used to expand the divergence angle along the grating unit arrangement direction, or simultaneously along the vertical direction of the grating unit arrangement direction.

[0036] The orthogonal characteristics described in this patent can be selected from different mutually identifiable characteristics, such as two linear polarization characteristics with mutually perpendicular polarization directions, or color characteristics of different colors, or two circular polarization characteristics of left-handed and right-handed polarization, or temporal characteristics activated by light at different time points. Taking temporal characteristics as an example, in any time period... O≥2 At each time point, adjacent O The light-transmitting apertures of each grating unit are opened sequentially (at a given time point, the adjacent...). O (Only one of the grating units has its light-transmitting aperture open); each grating unit corresponds to a basic display unit. The display content is only activated and refreshed under the drive of the control unit 30 when the light-transmitting aperture of that grating unit is open. Each grating unit, corresponding to a basic display unit, is also in a closed state without loading light information when its light-transmitting aperture is closed. Color characteristics can be common... O =3 types, namely R (red), G (green), and B (blue); using a conventional RGB subpixel display screen, its subpixels can be used as the basic display unit, corresponding to O =3 color characteristics. Furthermore, the display screen 10 can also be designed to consist of... O Composed of sub-pixels of 3 colors, in adjacent... O Each grating unit is assigned the [specific attribute]. OThe display is implemented when there are three color characteristics. The orthogonal characteristics of each grating unit—that is, the characteristic of allowing light with corresponding orthogonal characteristics to pass through while blocking light with non-corresponding orthogonal characteristics—can be achieved through attached devices. For example, timing characteristics can be achieved through time-openable liquid crystal light valves attached to each grating unit (the open state of the liquid crystal light valve corresponding to the grating unit is its active state, and the closed state is its inactive state). Polarization characteristics can be achieved through attached polarizers or waveplates, and color characteristics can be achieved through attached color filters, etc. In this document, these attached devices are considered components of the beam-splitting grating and are not shown separately in the relevant figures. The orthogonal characteristics of each grating unit can also be achieved by the grating unit itself. For example, a micro / nano structure as a grating unit chamber can be designed to allow only light with different color characteristics to pass through, or to allow light with different polarization characteristics to pass through. The orthogonal characteristics of each display unit can also be achieved through attached devices. For example, color filters attached to each display unit can achieve color characteristics, and waveplates and / or polarizers attached to each display unit can achieve polarization characteristics. The orthogonal characteristics of each display unit can also be achieved by the display unit itself. For example, under the control of the control unit 30, the display unit can achieve its timing characteristics by either not loading current (or voltage) or loading the current (or voltage) corresponding to the information to be displayed (the display unit is inactive when no current is loaded, and active when the display unit loads the current corresponding to the information to be displayed). In fact, Figure 1 by O Take the orthogonal property of =2 as an example. O You can take a larger value, for example, including O The color characteristics of two color categories, or in each time period. O >The timing characteristics activated in two time periods, or the combination of color characteristics and polarization characteristics, or the combination of timing characteristics and polarization characteristics, or the combination of color characteristics and timing characteristics, or the combination of polarization characteristics, timing characteristics and color characteristics.

[0037] Figure 1 by O =2、 N b =2、 n Taking =1 as an example, the setting rule of the orthogonality of its basic display unit and raster unit is reproduced in Figure 2 (a) in. Figure 2 (b) and (c) respectively show O In the case of =2, N b =2、 n =2 and N b =3、 n When =1, the orthogonal characteristic setting rules of the basic display unit and the raster unit. Figure 2 In (a) and (b), there are cases where two adjacent basic display units are of the same type. In this application, basic display units with the same orthogonal characteristics are named as similar basic display units; that is, basic display units emitting light with the same orthogonal characteristics are similar basic display units. Similarly, grating units that allow light to pass through with the same orthogonal characteristics are named as similar grating units. Among adjacent similar basic display units, the light emitted from one of the basic display units will, due to the aperture size of the grating unit and its diffraction effect, pass through the grating unit corresponding to the adjacent similar basic display unit, introducing major noise into the corresponding projection area. For example... Figure 1 The noise ray shown (the ray labeled "noise"), and Figure 2 The noise rays shown in (a) and (b) (rays labeled "noise"). Figure 2 In the case shown in (c), no similar basic display units are arranged adjacent to each other along the grating unit arrangement direction; however, a basic display unit may still project noise into the corresponding projection area through a non-corresponding grating unit that is separated from the corresponding grating unit by one grating unit, such as... Figure 2 (c) shows the noise ray (the ray labeled "noise"). Then, in Figure 2 As shown O≤n × N b In this case, for any given basic display unit, only one of the two basic display units on either side introduces significant noise, while the noise introduced by the other is suppressed. Basic display units further away from this basic display unit introduce noise beams with a larger deviation angle relative to the corresponding projection area, thus entering the corresponding projection area less or not at all.

[0038] Figure 3 for O =3、 N b =2、 n The optical structure of the single-screen display system with multiple 2D image projection areas when =1. Figure 3 Use “‐”, “•”, and “×” to represent O = 3 distinct orthogonal properties. For example, colors R (red), G (green), and B (blue). O =3 orthogonal properties of colors. Obviously, it could also be any of the other possible orthogonal properties mentioned above. Figure 3 For example, a slit can be used as a grating unit, where the grating unit is along... x Slits g1, g2, g3, g4, g5, g6, ... are arranged in a directional pattern. The spacing between adjacent grating units along the arrangement direction is... Δ g, the aperture of the grating unit is β×Δg. Raster units g1, g4, g7, ... allow only "-" light to pass through, blocking "•" and "×" light; raster units g2, g5, g8, ... allow only "•" light to pass through, blocking "-" and "×" light; raster units g3, g6, g9, ... allow only "×" light to pass through, blocking "-" and "•" light. The term "blocking" here does not refer to strict 100% blocking, but rather to the blocking of leaked light as noise within the acceptable range for display quality. (Along the raster unit arrangement direction) x Towards, basic display unit U 1. U 2. U 3. U 4. U 5… interval Δp Arranged, the luminous size of a single basic display unit is α×Δp . Figure 3 For the sake of simplicity and clarity in the diagram, take... α =1. In fact... α Other values ​​can also be selected. Figure 3 In the diagram, each grating unit corresponds to a basic display unit, with ( n × N b Two basic display units are arranged alternately. For the sake of simplicity and clarity, Figure 3 The raster units and basic display units are partially labeled. The raster units and basic display units shown are named according to their positional order; based on this naming rule, the names of the other raster units and basic display units can be easily determined. Specifically, Figure 3 The middle grating unit g6 corresponds to N b =2 basic display units U 8. U 11 They are n × N b =2 basic display units U 9 and U 10 The interval is the basic display unit. U 8. U 11 The basic display unit is spaced out by the "×" light emitted from the grating unit g6. U 9 and U 10 The emitted light is blocked by the "•" or "-" light by the grating unit g7; the grating unit g8 corresponds to... N b =2 basic display units U 12 , U 15 They aren × N b =2 basic display units U 13 and U 14 The interval corresponds to the basic display unit. U 12 , U 15 The grating unit g8 emits "•" light that is allowed to pass through, spaced by the basic display unit. U 13 and U 14 The emitted light is blocked by the "-" or "×" light by the grating unit g8; the grating unit g9 corresponds to... N b =2 basic display units U 14 , U 17 They are n × N b =2 basic display units U 15 and U 16 The interval corresponds to the basic display unit. U 14 , U 17 The basic display unit is spaced out by the "×" light emitted from the grating unit g9. U 15 and U 16 The emitted light, represented by a "•" or "-", is blocked by the grating unit g9; other grating units, corresponding to the basic display units, are used to determine their corresponding orthogonal characteristics. Therefore, O =3 and N b Under the condition of =2, along x The three adjacent basic display units emit different signals. O =3 types of orthogonal characteristic light.

[0039] Under the condition that formula (1) holds, the interval N b -1 = 1 basic display unit. Basic display units are grouped together, and the projected light from each basic display unit is converged to its corresponding projection area via its corresponding grating unit. Specifically, the basic display unit... U 1. U 3. U 5. U 7. U 9. U 11 ,U 13 ... respectively passed through grating units g 1. g 2. g 3. g 4. g 5. g 6. g 7. ..., projecting a beam of light to... C Projection area 1 centered on point 1; basic display unit U 2. U 4. U 6. U 8. U 10 , U 12 ... respectively passed through grating units g 3. g 4. g 5. g 6. g 7. g 8. ..., projecting a beam of light to... C The projection area 2 is centered on point 2. Figure 3 In this context, the central ray of light projected from any basic display unit, passing through the corresponding grating unit, and projected onto the corresponding projection area is represented by the line connecting the center of the basic display unit and the center of the corresponding grating unit. C Point 1 is the intersection of the center rays of all basic display units corresponding to projection area 1. C 2 represents the intersection point of the center rays of all basic display units corresponding to projection area 2. In reality, the center rays of a projection area corresponding to a basic display unit are not strictly required to intersect at a single point. Figure 3 In this diagram, the center of any grating unit is represented by a point, for example, the center point of grating unit g6. C g6 grating unit g 12 center point C g12 For clarity of illustration, Figure 1 The center point of grating unit g6 is marked only as an example. C g6 and grating unit g 12 center point C g12 .

[0040] The light emitted from any basic display unit, after passing through the corresponding grating unit, covers the corresponding projection area at a certain divergence angle. Figure 3 Similarly, using a slit grating as an example, along... x Orientation, without considering diffraction effects, for any basic display unit U 1 via the corresponding grating unitg 1. The divergence angle of the emitted light is the basic display unit. U 1 edge point M U1 , M' U1 and corresponding grating unit g 1 edge point M g1 , M' g1 The angle between the intersecting lines covers the area of ​​projection region 1. M 1 M' 1. The range of projection area 2 M 2 M' Similarly, we can obtain the result. Figure 3 For clarity, only a single element is shown in the diagram. U 1 and grating unit g The edge points of unit 1 are shown; the edge points of other basic display units and raster units are not shown. Along the raster unit arrangement direction, the luminous size of each basic display unit is represented by... α×Δp This indicates that the light emission size of each grating unit is represented by... β×Δg This indicates that, without considering diffraction effects, the size of the projection area... D s Similarly, it can be determined according to formulas (2) to (4). In reality, considering the diffraction effect of the grating unit aperture, the actual size of the projection area may be larger than the above. D s On the observer's plane, the optimal arrangement is for adjacent projection regions to be exactly adjacent to each other. Figure 3 For the sake of simplicity and clarity in the illustration, take α= For example, 1 can also take other values. Similarly, along the light transmission direction, a diffuser 60 can be placed in front of the beam splitter to expand the divergence angle of the light emitted from each grating unit along the grating unit arrangement direction or simultaneously along the vertical direction of the grating unit arrangement direction when the divergence angle of the emitted light is not large enough.

[0041] Figure 3 by O =3、 N b =2、 n Taking =1 as an example, the setting rule of the orthogonality of its basic display unit and raster unit is reproduced in Figure 4 (a) in. Figure 4 (b) and (c) respectively show O When =3 N b =2、 n =2 and N b =3、 n When =1, the orthogonal characteristic setting rules of the basic display unit and the raster unit. Figure 4 In (b) and (c), there are cases where two adjacent basic display units are of the same type. In this case, the light emitted from one of the adjacent basic display units will pass through the corresponding grating unit of the adjacent basic display unit, introducing major noise into the corresponding projection area. For example... Figure 4 The noise rays shown in (b) and (c) are the rays labeled "noise". Figure 2 In (a), O =3 > ( n × N b =2. In this case, there are no similar basic display units arranged adjacent to each other along the grating unit arrangement direction; and the noise projected by a basic display unit through a non-corresponding similar grating unit that allows its projected light to pass through is offset from the projection area due to a large offset angle with the corresponding projection area, thereby achieving low noise display.

[0042] In fact, large O Value, especially O> ( n × N b In single-screen display systems with multiple 2D image projection areas, crosstalk noise can be effectively suppressed. Furthermore, the orthogonality of a wider variety of, or even combined, rows can achieve greater [performance / suppression]. O =6. For example, the combined characteristics of RGB color properties and circular polarization properties: R +Left-hand circular polarizer R +Right-handed circular polarizer G +Left-hand circular polarizer G +Right-handed circular polarizer B +Left-hand circular polarizer B + Right-handed circular polarizer, corresponding to O =6.

[0043] The arrangement direction of the raster units and one of the arrangement directions of the basic display units can be the same, for example... Figure 5 and Figure 6 As shown. In this case, Figure 1 and Figure 3 As shown, along x Basic display unit U 1. U 2. U 3. U 4. U 5. U 6. U 7, ..., represents a single row of basic display units on display screen 10; similarly, the orthogonality of each basic display unit and its correspondence with the raster unit are set for basic display units in different rows. The longitudinal direction of the raster unit...y Direction, also shown as perpendicular to x Towards. Figure 5 In the middle, the arrangement direction of the basic display units x 'and the arrangement direction of the grating units x To the same direction, another arrangement direction of the basic display units y 'Perpendicular to x Towards. Then Figure 5 In the middle, the basic display units of adjacent rows are along x 'Towards where there is no misalignment, the projection area generated by each basic display unit along...' x Towards mutual overlap; Figure 6 In the middle, another arrangement direction of the basic display units y 'and y There is a non-zero included angle; at this time, the basic display units of adjacent rows are along x 'There is a misalignment, the projection area generated by the basic display units of adjacent rows, along...' x There will be some misalignment.

[0044] Figure 7 In the middle, the arrangement direction of the basic display units x 'Relative to the arrangement direction of the grating units x Towards tilt. In this case, Figure 1 and Figure 3 Middle x The basic display unit shown U 1. U 2. U 3. U 4. U 5. U 6. U 7. ... In fact, for the sake of... x 'A basic display unit in a straight line' RR The projection on '. RR 'For along x A straight line. For specific examples, one-to-one correspondence, Figure 1 and Figure 3 The basic display unit shown U 1. U 2. U 3. U 4. U 5. U 6. U 7. ..., actually Figure 7 Basic display unit in the middle row U i , U i+1 , U i+2 , U i+3 ,U i+4 , U i+5 , U i+6 ,…,along y Towards a straight line RR The projection on '. At this time, Δp for x 'To adjacent basic display units in a straight line' RR The projection spacing on '. In this case, for the sake of convenience, U 1. U 2. U 3. U 4. U 5. U 6. U 7. …still referred to as basic display units, but actually projected onto the actual basic display units on display screen 10. Similarly, the orthogonality of each of the other rows of basic display units and their correspondence with the raster units are set. At this time, the fill factor of the basic display unit… α It can be greater than 1.

[0045] Arrangement direction of basic display units x 'Towards the direction relative to the arrangement of grating units x When tilted, Figure 1 and Figure 3 In the middle, along x The basic display unit shown U 1. U 2. U 3. U 4. U 5. U 6. U 7. ..., can also be along x 'towards' L ≥2 rows of basic display units, along y Towards a straight line RR The projection on '. Figure 8 by L For example, =3. Specifically, Figure 1 and Figure 3 The basic display unit shown U 1. U 2. U 3. U 4. U 5. U 6. U 7. ... are actually adjacent. L =In the 3 rows of basic display units, the basic display unit U i , Ui+1 , U i+2 , U i+3 , U i+4 , U i+5 , U i+6 ... at a straight line RR The projection on '. The other adjacent ones L =3 rows of basic display units, and similarly set the orthogonal characteristics of each basic display unit and its correspondence with the raster unit. Figure 8 Corresponding Δp , will follow L The value decreases as it increases. Figure 7 and Figure 8 In the case shown, it is Figure 1 or Figure 3 The corresponding projection in U 1. U 2. U 3. U 4. U 5. U 6. U 7. ... may overlap, in which case α>1.

[0046] The single-screen display system with multiple 2D image projection areas may further include an aperture array 50 composed of light-transmitting apertures, such as... Figure 9 The aperture shown is… A 2. A 3. A 4. An aperture array 50 is composed of... Each aperture corresponds one-to-one with each grating unit of the beam splitter 20, and the light-transmitting area of ​​each grating unit is constrained or adjusted under the control unit 30. The size of the light-transmitting area affects the divergence angle of the light beam emitted from each basic display unit; thus, by adjusting the size of the light-transmitting area of ​​each grating unit, the divergence angle of the light emitted from the basic display unit is controlled to achieve a better depth of field. The edge points of the grating units described in this document, for example... Figure 1 Middle grating unit g 1 edge point M g1 , M' g1 This refers to the area along which its light-transmitting region... x The edge points of the light-transmitting area. A change in the light-transmitting area of ​​any grating unit is equivalent to a change in the position of the edge points of the light-transmitting region of that grating unit. For example, using sized liquid crystal light valves as the light-transmitting apertures of the aperture array 50, the size of their light-transmitting regions can be adjusted as needed under the drive of the control unit 30, thereby changing the light-transmitting area of ​​the grating unit. Furthermore, each light-transmitting aperture may also includeT >One sequentially opened sub-aperture, control unit 30 controls each basic display unit to synchronously refresh the display. Specifically, as follows: Figure 10 The aperture shown is... A 2. A 3. A 4. An array of apertures 50 consisting of… Its light-transmitting aperture… A 2 by T =2 sub-apertures SA 2(t), SA 2(t+ Δt / 2) Composition; Light transmission aperture A 3 by T =2 sub-apertures SA 3(t), SA 3(t+ Δt / 2) Composition; Light transmission aperture A 4 by T =2 sub-apertures SA 4(t), SA 4(t+ Δt / 2) Composition; and so on. In any time period t ~ t + Δt Within the time period t~t+ Δt / 2, sub-clear aperture..., SA 2(t), SA 3(t), SA 4(t), ... open; in another time period t+ Δt / 2~t+ Δt , sub-clear aperture..., SA 2(t+ Δt / 2) SA 3(t+ Δt / 2) SA 4(t+ Δt / 2), ... Open. Then, in two time periods of the same time cycle, a basic display unit projects light through the corresponding grating unit, which is equivalent to emitting light from different positions of the corresponding grating unit. By synchronously refreshing the display of the corresponding light information, the display resolution can be increased. At this time, a diffuser 60 can also be placed at the beam splitter grating 20 to increase the emission divergence angle of the light spots projected from each basic display unit on the diffuser.

[0047] When the display screen 10 is a passively emitting display device, a backlight unit 70 can also be introduced, which, driven by the control unit 30, illuminates the backlight in each time period. T For a time period of >1 hour, backlights of different directions are projected onto the display screen 10 in different time sequences. Specifically, Figure 11 Basic display unit U Taking 5 as an example, in any time periodt ~ t + Δt within the time period t ~ t + Δt / 2, backlight incident along direction 1, this basic display unit U 5. The projected light passes through the grating unit g2. PA 2( t Partial launch; during the time period of that time cycle. t + Δt / 2~ t + Δt The basic display unit is backlit in two directions. U 5. The projected light passes through the grating unit g2. PA 2( t + Δt / 2) Partial ejection. Then, within the same time period... T =Two time periods, one basic display unit projects light through the corresponding grating unit, equivalent to light from the corresponding grating unit. T =With two positions for emission, the corresponding light information can be displayed synchronously, thereby increasing the display resolution. At this time, the diffuser 60 can also be placed at the beam splitter grating 20 to increase the emission divergence angle of the light points projected from each basic display unit on the diffuser.

[0048] The beam splitter grating 20 can also be a controllable beam splitter grating, whose parameters can be controlled and adjusted under the drive of the control unit 30. For example, using liquid crystal slits as the grating units of the controllable beam splitter grating, the positions of each slit can be translated to change the positions of each projection area, according to... Figure 1 The tracking unit 40, as shown, provides the observer's position, enabling the projection area to follow the observer within a certain range. The tracking unit 40, driven by the control unit 30, can acquire the observer's position in real time. The controllable beam splitter, also controlled by the control unit 30, can sequentially present multiple parameter states. These different parameter states correspond to different projection areas. Furthermore, under the control of the control unit 30, the display screen 10 synchronously refreshes the display, expanding the projection area based on visual persistence. The controllable beam splitter 20, driven by the control unit 30, can also be adjusted to a failure state as needed. In this failure state, the beam splitter no longer has the ability to project multiple projection areas, thus enabling the system to implement 2D display with only one continuous viewing area, where all basic display units project images onto a single continuous projection area.

[0049] In the above process, when the distance between the projection areas is greater than the interpupillary distance along the arrangement direction of the grating units, and each projection area can accommodate both eyes of the observer, the observer in different projection areas will see different 2D images. When the distance between the projection areas is less than the interpupillary distance, and the observer's eyes are simultaneously in different projection areas, two different images are received by each eye, enabling monocular single-image 3D display. Even when the distance between the projection areas is less than the diameter of the observer's pupil, each eye of the observer can simultaneously cover more than one projection area, enabling monocular multiple 2D image 3D display. Using cylindrical lenses, or devices with cylindrical lens functions, as grating units is beneficial for reducing the distance between projection areas.

[0050] Figure 1 or Figure 3 The basic display unit can also be replaced by a composite display unit. Each composite display unit is composed of more than one light-emitting structure that projects different colors of light, pieced together. Relatively speaking, the basic display unit mentioned above is the smallest surface structure that can emit light; the composite display unit described here is composed of more than one light-emitting surface structure. Each composite display unit projects full-color light information under the drive of the control unit 30. Commonly, in a conventional RGB display screen, a pixel containing one R, one G, and one B sub-pixel can serve as a composite display unit. When using composite display units, the coverage area of ​​the light projected by each composite display unit through its corresponding grating unit on the viewing surface is larger than the binocular line size of the observer.

[0051] Example 2 In this embodiment, based on the above embodiments, the basic display unit in the above embodiments is replaced by a composite display unit. Specifically, this embodiment is described below. Figure 12 The basic optical structure of a single-screen display system with multiple 2D image projection areas designed using modular display units includes a display screen 10, a beam splitter 20 corresponding to the display screen 10, and a control unit 30. The display screen 10 is composed of modular display units capable of projecting color light information. Along the light propagation direction emitted from the display screen 10... z The beam splitter 20 is at a distance d Placed in front of the display screen 10; the beam-splitting grating 20, along a one-dimensional direction x The direction is formed by grating units arranged together. Figure 12 For example, the slit is a grating unit, and its grating unit is along... x Slits g1, g2, g3, g4, g5, g6, ... are arranged in a directional pattern. The spacing between adjacent grating units along the arrangement direction is... Δ g, the aperture size of the grating unit is β×Δ g, where β This represents the fill factor for the grating unit. Adjacent...O≥ Two grating units, each corresponding to another, allow for... O Orthogonal light passes through. Figure 12 by O Taking two types of orthogonal characteristic light, "•" light and "-" light, as an example. Specifically, grating units g1, g3, g5, ... allow only "-" light to pass through, blocking "•" light; grating units g2, g4, g6, ... allow only "•" light to pass through, blocking "-" light. The "blocking" mentioned here is not a strict 100% blocking, but rather refers to the blocking of leaked light as noise within the acceptable range of display quality. This is along the arrangement direction of the grating units. x Towards, splicing display unit p 1. p 2. p 3. p 4. p 5… interval Δp The luminous size of the arranged and combined display units is... α×Δp ',in α The fill factor for the combined display units. Each raster unit corresponds to... N b Each display unit is combined with ( n × N b The combined display units are arranged at intervals, where positive integers are... N b ≥2, positive integer n ≥1. Figure 12 by N b =2、 n Taking =1 as an example. Specifically, for example, grating unit g7 corresponds to... N b =2 composite display units p 10 , p 13 interval n × N b =2 combined display units p 11 and p 12 splicing display unit p 10 , p 13 The emitted light is allowed to pass through the grating unit g7, and the spacing between the two is used to construct the display unit. p 11 and p 12 The emitted light is blocked by the "•" symbol from grating unit g7; grating unit g8 corresponds to... N b=2 composite display units p 12 , p 15 interval n × N b =2 combined display units p 13 and p 14 splicing display unit p 12 , p 15 The emitted light, which is allowed to pass through the grating unit g8, is arranged in a "•" pattern, and the spacing between the two is used to create a display unit. p 13 and p 14 The emitted "-" light is blocked by grating unit g8; grating unit g9 corresponds to... N b =2 composite display units p 14 , p 17 interval n × N b =2 combined display units p 15 and p 16 splicing display unit p 14 , p 17 The emitted light is allowed to pass through the grating unit g9, and the spacing between the two is used to construct the display unit. p 15 and p 16 The emitted light, marked with a "•", is blocked by grating unit g9; other grating units correspond to the display units, and the same pattern applies to other units. Therefore, O =2 and N b Under the condition of =2, along x In each adjacent display unit, the same orthogonal characteristic light is emitted; in each of the four adjacent display units, the same orthogonal characteristic light is emitted. O = 2 types of orthogonal light characteristics.

[0052] according to Figure 12 The geometric relationships shown hold under the following conditions: D I / D= ( n × N b +1)× Δp ' / d (5), interval N b -1 = 1 unit of the combined display unit is grouped together, and each of the combined display units is converged to the same corresponding projection area through its corresponding grating unit. D I The distance between the projection areas. D The distance between the beam splitter grating 20 and the plane containing the projection area. d The spacing between the splicing display unit and the beam splitter grating 20. Specifically, the splicing display unit... p 1. p 3. p 5. p 7. p 9. p 11 , p 13 ... respectively passed through grating units g 1. g 2. g 3. g 4. g 5. g 6. g 7. ..., projecting a beam of light to... C Projection area 1 centered on point 1; splicing display unit p 2. p 4. p 6. p 8. p 10 , p 12 ... respectively passed through grating units g 3. g 4. g 5. g 6. g 7. g 8. ..., projecting a beam of light to... C Projection area 2 is centered at point 2. Note that the raster units at the edges may correspond to fewer than the number of display units in the final assembly. N b indivual. Figure 12 In this context, the central ray of light projected from any composite display unit, passing through the corresponding grating unit, and projected onto the corresponding projection area is represented by the line connecting the center of the composite display unit and the center of the corresponding grating unit. C Point 1 is the intersection of the center rays of all the spliced ​​display units corresponding to projection area 1. C2 represents the intersection point of the center rays of all the spliced ​​display units corresponding to projection area 2. In reality, the center rays of all the spliced ​​display units corresponding to a projection area are not strictly required to intersect at a single point. Figure 12 In this diagram, the center of any grating cell is represented by a point, for example, the center point of grating cell g6. C g6 grating unit g 12 center point C g12 For clarity of illustration, Figure 12 Only the center point of grating unit g6 is marked. C g6 and grating unit g 12 center point C g12 The center points of the other grating units are named in the same way. Figure 12 For clarity, only a portion of the combined display units and raster units are shown, and only a portion of these combined display units and raster units are labeled. The names of the other combined display units or raster units can be determined sequentially based on the relative positions of the labeled combined display units or raster units.

[0053] The light emitted from any of the splicing display units passes through the light emitted from the corresponding grating unit and covers the corresponding projection area at a certain divergence angle. Figure 12 Taking a slit grating as an example, along x Orientation, without considering diffraction effects, any composite display unit p 1 via the corresponding grating unit g 1. The divergence angle of the emitted light is for the splicing display unit. p 1 edge point M p1 , M' p1 and grating unit g 1 edge point M g1 , M' g1 The angle between the intersecting lines covers the area of ​​projection region 1. M 1 M' 1. Among them, M 1 is a connection. M' p1 M g1 The intersection of the projection area; M' 1 is a connection. M p1 M' g1 The intersection of the projection area and the projection area. The range of projection area 2. M 2M' Similarly, we can obtain the result. Figure 12 For clarity, only a single element is shown in the diagram. p 1 and grating unit g The edge points of unit 1 are labeled, and the edge points of other composite display units and raster units are named similarly. Along the arrangement direction of the raster units, the luminous size of each composite display unit is represented by... α×Δp ' indicates that the light emission size of each grating unit is represented by... β ×Δg This indicates that, without considering diffraction effects, the size of the projection area... D s Determined according to the following formulas: d' 1 / d' 2 = ( α×Δp ') / ( β×Δg (6), d' 1+ d' 2 =d (7) D s / ( β×Δg ) = ( d' 2 +D ) / d' 2(8).

[0054] in, d' 1. d' 2 are respectively R' Dot and splicing display unit p 1. Grating unit g The spacing of 1, such as Figure 12 . R' A dot is a display unit p 1 edge point M p1 , M' p1 and grating unit g 1 edge point M g1 , M' g1 The intersection of the intersecting lines. In reality, considering the diffraction effect of the grating unit aperture, the actual size of the projection area can be larger than the above. D s The optimal arrangement is for adjacent projection areas to be exactly adjacent to each other. Figure 12 In the diagram, for simplicity and clarity, the fill factor of the combined display unit is used. α= 1. For example 。 Figure 12A slit is used as the grating unit. In practice, the grating unit can also be a convex cylindrical lens with a positive focal length, a concave cylindrical lens with a negative focal length, or even a micro / nano structure device, such as a micro / nano structure device with cylindrical lens functionality. Along the light transmission direction, a diffuser 60 can also be placed in front of the beam-splitting grating; when the divergence angle of the light projected by each composite display unit through the corresponding grating unit is insufficient, it is used to expand the divergence angle along the grating unit arrangement direction, or simultaneously along the vertical direction of the grating unit arrangement direction. In fact, Figure 12 by O Take the orthogonal property of =2 as an example. O You can take a larger value, for example, including O The color characteristics of two color categories, or in each time period. O >The timing characteristics activated in two time periods, or the combination of color characteristics and polarization characteristics, or the combination of timing characteristics and polarization characteristics, or the combination of color characteristics and timing characteristics, or the combination of polarization characteristics, timing characteristics and color characteristics. Figure 12 Only with O =2、 N b =2、 n Let's take 1 as an example. Other values ​​are also possible, similar to the case of using a basic display unit.

[0055] In practice, when using a composite display unit, the projection area of ​​a composite display unit can be defined by the area commonly covered by the light projected by the different light-emitting structures of the corresponding grating units. The projection area of ​​a basic display unit group is the overlapping area of ​​the projection areas of all its basic display units. In this case, a certain tilt angle between the grating unit arrangement direction and the composite display unit arrangement direction is more conducive to widening the projection area. Simultaneously, the introduction of the diffuser 60 also contributes to widening the projection area.

[0056] In the above embodiments, the display screen 10 and the corresponding beam splitter grating 20 are shown as planar devices, but they can also be curved devices, with the basic display unit (or spliced ​​display unit) and grating unit arranged on curved surfaces. Various display devices, including backlit and active-emitting types, such as LCD screens, LED screens, OLED screens, LBS (MEMS), etc., can all serve as the display screen 10 of this patent. In the relevant figures of the above embodiments, the basic display unit is shown as a square; in reality, the basic display unit can be other possible shapes. For example, in common RGB displays, common bar-shaped R, G, B sub-pixels are combined into a square pixel, and each bar-shaped sub-pixel can serve as a basic display unit. As another example, in displays with different R, G, B sub-pixel shapes and / or sizes, each sub-pixel can also serve as a basic display unit. In the above embodiments, a medium can also be filled between the display screen 10 and the beam splitter grating 20 to bond the display screen 10 and the beam splitter grating 20, or / and increase the effective optical path of the beam to reduce the geometric thickness of the structure.

[0057] The above are merely preferred embodiments of the present invention, but the design concept of the present invention is not limited thereto. Furthermore, other mutually identifiable characteristics not exhaustively listed in this patent may also be selected as orthogonal characteristics. Accordingly, all related embodiments fall within the protection scope of the present invention.

Claims

1. A single screen display system for multiple 2D image projection areas, characterized in that, Comprising: a display screen (10) comprising a plurality of basic display units capable of projecting light information, the basic display unit being the smallest area light emitting structure projecting light information; a light splitting grating (20) corresponding to the display screen (10) is placed, arranged by a plurality of grating units along the one-dimensional grating unit arrangement direction, and, along the direction of the arrangement of the grating units, the grating units corresponding to any grating unit are arranged in a periodical manner N b a plurality of basic display units are arranged in a periodical manner n × N b a plurality of basic display units are arranged in a periodical manner N b ≥2, and the positive integer n ≥1. Among them, adjacent O Each grating unit, in a one-to-one correspondence, allows only distinct elements from each other. O A basic display unit with orthogonal characteristic light passes through a certain type of light, and corresponding to the same grating unit, emits only the corresponding orthogonal characteristic light allowed to pass through that grating unit, wherein the integer... O ≥2; a control unit (30) connected with the display screen (10) for controlling the basic display unit of the display screen (10) to load light information; The single-screen display system for the multiple 2D image projection areas is configured such that, along the arrangement direction of the grating units, the intervals are (…). N b -1) Each of the basic display units projects a beam of light onto the same projection area through its corresponding grating unit. and, the control unit (30) controls any projection area corresponding to each basic display unit to load corresponding 2D image.

2. The single screen display system of multiple 2D image projection areas according to claim 1, wherein, The grating unit of the light splitting grating (20) is a slit, or a cylindrical lens, or a micro-nano structure device.

3. The single screen display system of multiple 2D image projection areas according to claim 1, wherein, The orthogonal characteristic is a polarization orthogonal characteristic, or / and a color orthogonal characteristic, or / and a time orthogonal characteristic, or a mixed orthogonal characteristic composed of different orthogonal characteristics.

4. The single screen display system of multiple 2D image projection areas according to claim 1, wherein, The light splitting grating (20) is a controllable light splitting grating connected with the control unit (30), which can be controlled by the control unit (30) to adjust the parameters of the light splitting grating (20) under control, the parameters of the light splitting grating (20) including the position of the grating unit, or / and the focal length of the grating unit.

5. The single screen display system of multiple 2D image projection areas according to claim 4, wherein, Further comprising a tracking unit (40) connected with the control unit (30) and driven by the control unit (30) to obtain the observer's pupil position in real time; The control unit (30) can adjust the parameters of the light splitting grating (20) according to the observer's pupil position, and control the display screen (10) to implement refresh display to realize the tracking coverage of the projection area to the observer's pupil.

6. The single screen display system of multiple 2D image projection areas according to claim 4, wherein, At different time points in any time period, the light splitting grating (20) can present multiple parameter states in time sequence under the regulation of the control unit (30); Or, the light splitting grating (20) can be adjusted to an invalid state as needed under the control of the control unit (30) to implement 2D display of only one continuous projection area.

7. The single screen display system of multiple 2D image projection areas according to claim 1, wherein, The basic display unit of the display screen (10) is a single sub-pixel, or a full-color basic display unit composed of different sub-pixels emitting different color light, or a hole using different color backlight time sequence incidence.

8. The single screen display system of multiple 2D image projection areas according to claim 1, wherein, Further comprising a diffuser sheet (60) scattering the light emitted by each grating unit.

9. The single screen display system of multiple 2D image projection areas according to claim 1, wherein, Further comprising an aperture array (50) composed of light transmission apertures, each light transmission aperture of the aperture array (50) corresponds to each grating unit of the light splitting grating (20) one by one, and the light transmission area of each grating unit is adjusted under the regulation of the control unit (30).

10. The single screen display system of multiple 2D image projection areas according to claim 9, wherein, The light transmission aperture includes more than one sub-light transmission aperture opened in time sequence, and the control unit (30) controls the synchronous refresh display of each basic display unit.

11. The single screen display system of multiple 2D image projection areas according to claim 10, wherein, Further comprising a diffuser sheet (60) scattering the light emitted by each grating unit at least along the grating unit arrangement direction.

12. The single screen display system of multiple 2D image projection areas according to claim 1, wherein, The display screen (10) is a passive light-emitting display device, and a backlight unit (70) connected with the control unit (30) sequentially projects different directional backlights to the display screen (10) in different directions in each time period T The control unit (30) controls the synchronous refreshing of each basic display unit to display, wherein the integer T ≥ 2.

13. The single screen display system of multiple 2D image projection areas according to claim 12, wherein, Further comprising a diffuser sheet (60) scattering the light emitted by each grating unit at least along the grating unit arrangement direction.

14. A single screen display system for multiple 2D image projection areas, characterized by, Comprising: a display screen (10) comprising a plurality of split display units capable of projecting light information, the split display unit being a structure emitting full-color light composed of more than one light emitting structure surface spliced together; A light splitting grating (20) is arranged corresponding to the display screen (10), and is arranged by a plurality of grating units along a one-dimensional grating unit arrangement direction, and, along the grating unit arrangement direction, corresponding to any grating unit N b one split display unit, spaced n × N b one split display unit, spaced N b ≥2, integer n ≥1; Wherein, the adjacent O grating units respectively allow mutually different O orthogonal characteristic lights to pass through, and the split display units corresponding to the same grating unit only emit the orthogonal characteristic light corresponding to the grating unit, wherein the integer O ≥2. A control unit (30) is connected with the display screen (10), and is used for controlling the display screen (10) to load light information to each split display unit. The single-screen display system of the multiple 2D image projection areas is arranged to project, along the raster unit arrangement direction, light beams with a coverage size greater than the size of the line connecting the two eyes of the observer to the same projection area through the respective corresponding raster unit of each split display unit, N b -1) each split display unit of the split display unit, respectively, projects light beams with a coverage size greater than the size of the line connecting the two eyes of the observer to the same projection area through the respective corresponding raster unit, And the control unit (30) controls any projection area to load a corresponding 2D image to each split display unit.

Images