3D display device and 3D display driving method

Abstract

This invention relates to a 3D display device, comprising a display panel and a microlens array located on the light-emitting surface of the display panel. The display panel includes a plurality of sub-pixels, with sub-pixels of the same color arranged along a first direction and sub-pixels of different colors arranged along a second direction perpendicular to the first direction. The first direction is parallel to the line connecting the viewer's eyes. The microlens array includes a plurality of cylindrical lenses arranged along the first direction, the extending direction of which is parallel to the second direction. In the first direction, each cylindrical lens covers M corresponding sub-pixels, where M is a natural number. This invention also relates to a 3D display driving method.

Description

Technical Field

[0001] The present invention relates to the technical field of display product manufacturing, and in particular to a 3D display device and a 3D display driving method. Background Art

[0002] The current naked-eye 3D display technology mainly uses the method of obliquely arranging cylindrical mirrors to achieve viewpoint separation, which will inevitably increase the crosstalk between viewpoints. The naked-eye 3D applied to OLED is limited by the PDL Gap size and cannot achieve a large visual space with many continuous viewpoints. In addition, the existing technology will cause the 3D display resolution to decrease and some viewpoint pixels to be missing, and the overall power consumption and cost remain high, which seriously restricts the development of naked-eye 3D display. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a 3D display device and a 3D display driving method to solve the problem of low 3D display resolution.

[0004] In order to achieve the above object, the technical solution adopted in the embodiment of the present invention is: a 3D display device includes a display panel and a micro lens array located on the light emitting surface of the display panel,

[0005] The display panel includes a plurality of sub-pixels, sub-pixels of the same color are arranged along a first direction, and sub-pixels of different colors are arranged along a second direction perpendicular to the first direction, and the first direction is parallel to a line connecting the two eyes of the viewer;

[0006] The microlens array includes a plurality of cylindrical lenses arranged along the first direction, the extension direction of the cylindrical lenses is parallel to the second direction, and in the first direction, each of the cylindrical lenses covers M corresponding sub-pixels, where M is a natural number.

[0007] Optionally, along the first direction, the plurality of cylindrical lenses are periodically arranged, each period includes 2 or more cylindrical lenses, and the projection areas corresponding to the plurality of cylindrical lenses in the same period are cross-complementary to form a continuous imaging surface.

[0008] Optionally, the number of the cylindrical lenses and the number of the sub-pixels in the same period are mutually prime.

[0009] Optionally, the plurality of cylindrical lenses in the same period include at least one first cylindrical lens, and the number of sub-pixels corresponding to the first cylindrical lens is different from the number of sub-pixels corresponding to the remaining cylindrical lenses in the same period.

[0010] Optionally, in the first direction, the first cylindrical lens is located on one side of the remaining cylindrical lenses in the same period.

[0011] Optionally, one period includes N cylindrical lenses, each sub-pixel includes an opening area and a non-opening area, and in the first direction, the width of the opening area is 1 / N of the width of the sub-pixel.

[0012] Optionally, the number of the sub-pixels in one period is m, and in the first direction, the widths of the plurality of cylindrical lenses are the same, and in the first direction, the width of each cylindrical lens is m times the width of the opening area, where m is a natural number.

[0013] Optionally, along the first direction, orthographic projections of different cylindrical lenses located in the same period on the display panel are sequentially offset by a first width, and the first width is equal to a width of the opening area.

[0014] Optionally, the number of cylindrical lenses in different periods is the same.

[0015] Optionally, the plurality of periodically arranged cylindrical lenses include at least one first period, and the number of cylindrical lenses in the first period is different from the number of cylindrical lenses in other periods outside the first period.

[0016] Optionally, the light emitting surface of the display panel is located on the focal plane of the cylindrical lens.

[0017] Optionally, a distance H between the cylindrical lens and the display panel satisfies the following formula: H=n*f, wherein n is the refractive index of the medium between the light emitting surface and the cylindrical lens, and f is the focal length of the cylindrical lens.

[0018] The embodiment of the present invention further provides a 3D display driving method, which is implemented by using the above-mentioned display device, wherein along the first direction, a plurality of the cylindrical lenses are periodically arranged, and a plurality of sub-pixels corresponding to one period form a pixel island, comprising the following steps:

[0019] Providing a three-dimensional target object, and determining actual image information obtained when human eyes are located at different positions viewing the three-dimensional target object;

[0020] Determine the correspondence between the position of each sub-pixel and the position of the viewpoint;

[0021] Obtaining an angular spectrum boundary of the projection area corresponding to the sub-pixel according to the angular spectrum distribution of the projection area corresponding to the sub-pixel;

[0022] Determine the corresponding relationship between the angular spectrum position of the projection area corresponding to the sub-pixel and the sub-pixel;

[0023] Determine the viewer's eyebrow center coordinates and eye viewing angle to obtain corresponding image information;

[0024] According to the angle between the center of the eyebrows and each pixel island, the position of the pixel island corresponding to the center of the eyebrows is obtained, and the image information is loaded on the pixel island and the pixel islands located around the pixel island.

[0025] The embodiment of the present invention further provides a 3D display driving method, which is implemented by using the above-mentioned display device, and includes the following steps:

[0026] Determine the pupil coordinates of the human eye;

[0027] Determine, according to the pupil coordinates of the human eye, the position of the first sub-pixel that forms the viewpoint entering the human eye;

[0028] The first sub-pixel is lit, or the first sub-pixel and a preset number of sub-pixels around the first sub-pixel are lit.

[0029] The beneficial effect of the present invention is that sub-pixels of the same color are arranged along a first direction parallel to the line connecting the two eyes of a person, and sub-pixels of different colors are arranged along a second direction perpendicular to the first direction. In the first direction, there is no need to consider the problem of evaporation color cross-talk, so the width of the PDL (pixel definition layer) between adjacent sub-pixels of the same color can be compressed to the extreme, thereby increasing the pixel aperture ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram showing the distribution of cylindrical lenses in the related art;

[0031] Figure 2 A schematic diagram showing the distribution of sub-pixels and cylindrical lenses in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram showing the relationship between the aperture ratio of a sub-pixel and the life of a display device;

[0033] Figure 4 A schematic diagram showing a sub-pixel projection area;

[0034] Figure 5 A schematic diagram showing the projection of sub-pixels within a period;

[0035] Figure 6 A schematic diagram showing the translational superposition of projection areas corresponding to two cylindrical lenses within one period;

[0036] Figure 7 A schematic diagram showing a comparison of the light path when the light emitting surface of the display panel is located at the focal plane of the cylindrical lens and the light path when the light emitting surface of the display panel is located at the non-focal plane;

[0037] Figure 8 A schematic diagram of crosstalk showing that the light emitting surface of the display panel is located in a non-focal plane of the cylindrical lens;

[0038] Fig. 9A schematic diagram of crosstalk showing that the light emitting surface of the display panel is located at the focal plane of the cylindrical lens;

[0039] Fig.10 Schematic diagram showing the main lobe and side lobe areas of the projection area Figure 1 ;

[0040] Fig.11 Schematic diagram showing the main lobe and side lobe areas of the projection area Figure 2 ;

[0041] Fig.12 A schematic diagram showing the comparison between viewpoint index and sub-pixel index;

[0042] Fig.13 A schematic diagram showing the distribution of viewpoint angular spectrum;

[0043] Fig.14 A schematic diagram showing the angular spectrum boundary of a sub-pixel;

[0044] Fig.15 A schematic diagram showing the angle between the center of the eyebrows and the display panel;

[0045] Fig.16 A schematic diagram showing the determination of the position of a sub-pixel according to the coordinates of the center of the eyebrows;

[0046] Fig.17 Schematic diagram showing multiple images corresponding to different positions of the human eye;

[0047] Fig.18 A schematic diagram showing an image corresponding to a human eye being located at a first position;

[0048] Fig.19 A schematic diagram showing an image obtained by loading corresponding image information on corresponding sub-pixels and performing display driving;

[0049] Fig. 20 A schematic diagram showing the coverage of sub-pixels corresponding to the pupil of a human eye;

[0050] Fig.21 Schematic diagram showing the relationship between power consumption and the number of lit sub-pixels. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] refer to Figure 1 In the related art, the viewpoints are arranged along the oblique direction (the cylindrical lenses 100 are arranged obliquely), such as Figure 1 For example, viewpoint 2 and viewpoint 6 in the image, first of all, it can be seen that viewpoint 2 and viewpoint 6 are basically located at the edge of the corresponding cylindrical lens 100, and the projections of the two in space are basically the same, which is bound to increase the crosstalk between the two; in addition, it can be seen that the boundary of the cylindrical lens 100 passes through the middle of viewpoint 2, that is, only 50% to 70% of the luminous area can enter its intrinsic projection area, and the remaining less than 50% is crosstalked into other viewpoints, causing a certain degree of dizziness; in addition, the 2D display pixels are RGB (red sub-pixel 10, green sub-pixel 20, blue sub-pixel 30) arranged horizontally, but after adding the cylindrical lens 100, the RGB sub-pixels are arranged vertically, which has the impact that the vertical resolution of the screen is reduced to 1 / 3, or even more, resulting in resolution imbalance and 2D / 3D display mismatch.

[0054] refer to Figure 2 In order to solve the above technical problems, this embodiment provides a 3D display device, including a display panel and a micro lens array located on a light emitting surface of the display panel.

[0055] The display panel includes a plurality of sub-pixels, the sub-pixels of the same color are arranged along a first direction (refer to the X direction in FIG. 2 ), and the sub-pixels of different colors are arranged along a second direction (refer to the X direction in FIG. 2 ) perpendicular to the first direction. Figure 2 The first direction is parallel to the line connecting the two eyes of the viewer;

[0056] The microlens array includes a plurality of cylindrical lenses 1 arranged along the first direction, the extension direction of the cylindrical lenses 1 is parallel to the second direction, and in the first direction, each of the cylindrical lenses covers M corresponding sub-pixels, where M is a natural number.

[0057] In this embodiment, sub-pixels of the same color are arranged along a first direction parallel to the line connecting the two eyes of a person, and sub-pixels of different colors are arranged along a second direction perpendicular to the first direction. In the first direction, there is no need to consider the problem of cross-color deposition, so the width of the PDL (pixel definition layer) between adjacent sub-pixels of the same color can be compressed to the extreme, for example, it can be compressed from 20um in the related art to 5-6um, that is, in the first direction, the width of the pixel definition layer between adjacent sub-pixels is 5-6um, thereby increasing the pixel aperture ratio, and the pixel aperture ratio can be increased from 15% to more than 30% (the aperture ratio directly affects the life of the display device), ensuring the reliability of the display device. Figure 3 is a schematic diagram of the corresponding relationship between the aperture ratio of the sub-pixel and the life of the display device, Figure 3 The curve with the origin in the middle represents the attenuation rate, and the rectangular bar represents LT95 (lifetime95), that is, the time taken for the brightness to drop to 95% of the highest point, which represents the lifespan. The vertical axis on the left side of Figure 3 represents time in hours, the horizontal axis is the aperture ratio, and the vertical axis on the right side is the maximum brightness ratio.

[0058] It should be noted that Figure 2 The middle display panel includes a red sub-pixel 10 , a green sub-pixel 20 and a blue sub-pixel 30 , and the red sub-pixel 10 , the green sub-pixel 20 and the blue sub-pixel 30 are arranged along the first direction, respectively.

[0059] Since there is still a small PDL Gap between the sub-pixels of the same color arranged in the first direction (i.e., a PDL pixel definition layer is provided between adjacent sub-pixels of the same color, and the pixel definition layer has a certain width in the first direction), the projection of the sub-pixels in the viewing space through the cylindrical lens will inevitably have bright and dark partitions (such as Figure 4 As shown), moiré patterns are formed, which seriously affects the display effect. To address this problem, in one implementation of this embodiment, along the first direction, a plurality of cylindrical lenses 1 are periodically arranged, each period includes 2 or more cylindrical lenses, and the projection areas corresponding to the plurality of cylindrical lenses 1 in the same period are cross-complementary to form a continuous imaging surface.

[0060] The projection areas corresponding to the multiple cylindrical lenses 1 in the same period are cross-complementary to form a continuous imaging surface, that is, the projection area corresponding to each cylindrical lens 1 includes a bright area 200 and a dark area 300. Along the first direction, the multiple cylindrical lenses 1 are periodically arranged, and the projection areas formed by different cylindrical lenses 1 in the same period are shifted and superimposed. Then, the bright area 200 in the projection area formed by one cylindrical lens 1 will be superimposed (at least partially overlapped) with the dark area 300 in the projection area formed by another cylindrical lens 1, which will reduce the width of the dark area or even eliminate the dark area, so as to form a continuous imaging surface. Figure 6 The diagram is a schematic diagram of the translational superposition of the projection areas corresponding to two cylindrical lenses 1 within a period, in which the bright area 200 in the projection area formed by one cylindrical lens 1 is superimposed with the dark area 300 in the projection area formed by the other cylindrical lens 1. The pattern area is the bright area of ​​the projection area corresponding to one cylindrical lens 1, and is also the dark area of ​​the projection area corresponding to the other cylindrical lens 1, thus forming a cross-complementary relationship to form a continuous imaging surface.

[0061] In an exemplary embodiment, the number of the cylindrical lenses 1 and the number of the sub-pixels in the same period are relatively prime.

[0062] The number of sub-pixels corresponding to each cylindrical lens 1 can be determined based on the number m of all sub-pixels corresponding to all the cylindrical lenses 1 in the same period and the number N of the cylindrical lenses 1 in the same period. Specifically, it can be obtained according to the following formula: m / N=a…b, that is, the quotient of m / N is a, the remainder is b, b is less than N, and on the basis that each cylindrical lens 1 corresponds to a sub-pixels, 1 is added to the number of sub-pixels corresponding to b cylindrical lenses 1, that is, the number of sub-pixels corresponding to b cylindrical lenses 1 is a+1 (in order to ensure that the width of each cylindrical lens in the first direction is the same, 1 is added to the number of sub-pixels corresponding to b cylindrical lenses 1). For example, m is 11, N is 2, 11 / 2=5…1, that is, a=5, b=1, then among the two cylindrical lenses 1, the number of sub-pixels corresponding to one cylindrical lens 1 is 5, and the number of sub-pixels corresponding to the other cylindrical lens 1 is 6. For reference, Figure 5 For example, m is 11, N is 3, 11 / 3=3…2, that is, a=3, b=2, then among the three cylindrical lenses 1, the number of sub-pixels corresponding to one cylindrical lens 1 is 3, and the number of sub-pixels corresponding to the other two cylindrical lenses 1 is 4 each.

[0063] The periodic arrangement rule of the cylindrical lenses 1 is obtained by the width ratio of the dark area 300 to the bright area 200 in the projection area formed by a cylindrical lens 1, so that the projection boundary of the first sub-pixel corresponding to a cylindrical lens 1 in the same period is parallel to the projection boundary of the second sub-pixel in another cylindrical lens 1, so that the superposition effect of the bright area and the dark area of ​​the projection area of ​​different sub-pixels can be formed.

[0064] It should be noted that the sub-pixels corresponding to each cylindrical lens 1 are numbered along the same direction, and the number of the first sub-pixel is the same as the number of the second sub-pixel. For example, the sub-pixels corresponding to each cylindrical lens 1 are numbered from left to right, the first sub-pixel is the first sub-pixel corresponding to the corresponding cylindrical lens, and the second sub-pixel is the first sub-pixel corresponding to the corresponding cylindrical lens. Figure 5 , the projection boundary a of the first sub-pixel 1001 and the projection boundary b of the second sub-pixel 1002 are parallel.

[0065] In an exemplary embodiment, the plurality of cylindrical lenses 1 in the same period include at least one first cylindrical lens, and the number of sub-pixels corresponding to the first cylindrical lens is different from the number of sub-pixels corresponding to the remaining cylindrical lenses in the same period.

[0066] If the number of sub-pixels corresponding to all the cylindrical lenses 1 in the same period is the same, the formed projection areas are the same, that is, the arrangement rules of the bright and dark areas, and the corresponding positions are the same. When the projection areas corresponding to all the cylindrical lenses 1 in the same period are superimposed, there will be no overlap between the bright area of ​​the projection area corresponding to one cylindrical lens 1 and the dark area of ​​the projection area corresponding to another cylindrical lens 1, that is, a continuous imaging surface cannot be achieved. Therefore, in this embodiment, the number of sub-pixels corresponding to the first cylindrical lens is different from the number of sub-pixels corresponding to the remaining cylindrical lenses in the same period, so as to achieve a continuous imaging surface. Figure 5 , Figure 5 2 cylindrical lenses are shown arranged in a period. The number of sub-pixels corresponding to one cylindrical lens is 6, and the number of sub-pixels corresponding to one cylindrical lens is 5.

[0067] In an exemplary embodiment, in the first direction, the first cylindrical lens is located on one side of the remaining cylindrical lenses 1 in the same period.

[0068] When arranging the cylindrical lenses 1 and the corresponding sub-pixels, since there are cylindrical lenses 1 with different numbers of corresponding sub-pixels, the sub-pixels corresponding to different cylindrical lenses 1 will be offset in one direction. If the first cylindrical lenses are located in the middle position within the same period, it cannot be guaranteed that the corresponding projection areas are compensated and superimposed according to the preset rules.

[0069] In an exemplary embodiment, N cylindrical lenses 1 are included in one period, each sub-pixel includes an opening area and a non-opening area, and in the first direction, the width of the opening area is 1 / N of the width of the sub-pixel.

[0070] refer to Figure 5In the first direction, the width of the opening area is c, the width of the non-opening area is d, and there are 2 cylindrical lenses 1 in one period, c=d, that is, the width of the opening area is 1 / 2 of the width of the sub-pixel.

[0071] By adopting the above scheme, it is possible to effectively achieve the effect of superimposing the bright area in the projection area corresponding to one cylindrical lens 1 and the dark area in the projection area corresponding to another cylindrical lens 1 in the same period, and ensure that the width of each cylindrical lens 1 is consistent in the first direction. For example, the number m of sub-pixels corresponding to the cylindrical lenses 1 in the same period is 11, N is 2, and the width of the opening area of ​​each sub-pixel is 1 / 2 of the total width of the sub-pixel. Then, in the two cylindrical lenses 1, the width of each cylindrical lens 1 in the first direction is m times the width of the opening area, and the positions of the sub-pixels corresponding to the two cylindrical lenses 1 are staggered by the width of an opening area in the first direction. At the connection of the two cylindrical lenses, the two cylindrical lenses together correspond to and cover a complete sub-pixel; for example, the number m of sub-pixels corresponding to the cylindrical lenses 1 in the same period is 11, N is 3, and the width of the opening area of ​​each sub-pixel is 1 / 3 of the total width of the sub-pixel. Then, in the three cylindrical lenses 1, the position of the sub-pixel corresponding to each cylindrical lens 1 is staggered by the position of the opening area relative to the position of the sub-pixel corresponding to the cylindrical lens 1 adjacent to it, with reference to Figure 5 The opening area of ​​the sub-pixel corresponding to the edge of the cylindrical lens on the left close to the cylindrical lens on the right is covered by the cylindrical lens on the left, and the non-opening area of ​​the sub-pixel corresponding to the edge of the cylindrical lens on the left close to the cylindrical lens on the right is covered by the cylindrical lens on the right.

[0072] In an exemplary embodiment, the number of sub-pixels in one period is m, and in the first direction, the widths of the plurality of cylindrical lenses 1 are the same, and in the first direction, the width of each cylindrical lens 1 is m times the width of the opening area, where m is a natural number.

[0073] In an exemplary embodiment, along the first direction, the orthographic projections of different cylindrical lenses located in the same period on the display panel are sequentially shifted by a first width, and the first width is equal to the width of the opening area.

[0074] In an exemplary embodiment, the number of cylindrical lenses in different periods is the same, that is, the number of cylindrical lenses included in all periods is the same, for example, each period includes 2 cylindrical lenses.

[0075] In an exemplary embodiment, the plurality of cylindrical lenses arranged periodically include at least one first period, and the number of cylindrical lenses included in the first period is different from the number of cylindrical lenses included in other periods.

[0076] In an exemplary embodiment, the plurality of cylindrical lenses arranged periodically include at least one first period and at least one second period, and the number of cylindrical lenses in the first period is different from the number of cylindrical lenses in the second period.

[0077] Exemplarily, the multiple cylindrical lenses arranged periodically include at least one third period outside the first period and the second period, the number of cylindrical lenses in the first period is different from the number of cylindrical lenses in the third period, and the number of cylindrical lenses in the second period is different from the number of cylindrical lenses in the second period.

[0078] In an exemplary embodiment, the light emitting surface of the display panel is located on the focal plane of the cylindrical lens.

[0079] refer to Figure 7 In an exemplary embodiment, the distance H between the cylindrical lens 1 and the display panel satisfies the following formula: H=n*f, where n is the refractive index of the medium between the light-emitting surface 1003 of the display panel and the cylindrical lens 1, and f is the focal length of the cylindrical lens.

[0080] In order to solve the crosstalk between adjacent viewpoints, the light-emitting surface of the display panel (it should be noted that for OLED display devices, the actual light-emitting surface is the EL (light-emitting layer) light-emitting surface, which can also be expressed as the display panel light-emitting surface or the sub-pixel light-emitting surface) needs to be placed on the focal plane of the cylindrical lens 1. Figure 7 When the focal plane C is located, each point on the light-emitting surface of the display panel emits light approximately in a collimated manner after passing through the lens (such as the light path shown by reference numeral 101), and when the light-emitting surface of the display panel is located at the non-focal plane D, each point on the light-emitting surface of the display panel emits light at a certain inclination angle after passing through the cylindrical lens (refer to Figure 7 The larger the inclination angle, the greater the crosstalk between adjacent sub-pixels (compared to Figure 8 and Fig. 9 ),like Figure 7 In order to ensure that the light-emitting surface of the display panel is in the focal plane of the cylindrical lens, the placement height of the cylindrical lens 1 (i.e., the distance between the cylindrical lens and the display panel) must satisfy the following relationship: H = n*f, where H is the placement height, n is the refractive index of the medium between the light-emitting surface of the display panel and the cylindrical lens, and f is the focal length of the cylindrical lens itself.

[0081] For viewing a three-dimensional target object, different images are obtained in different positions of human eyes. For example, if the human eyes are located in front of the three-dimensional target object, a front view is obtained, and if the human eyes are located on the side of the three-dimensional target object, a side view of the three-dimensional target object is obtained. In order to better achieve a three-dimensional effect, realize a super large visual space, and restore the real world, an embodiment of the present invention further provides a 3D display driving method, which is implemented by using the above-mentioned display device. Along the first direction, a plurality of cylindrical lenses are periodically arranged, and a plurality of sub-pixels corresponding to one period form a pixel island, comprising the following steps:

[0082] Providing a three-dimensional target object, and determining actual image information obtained when human eyes are located at different positions viewing the three-dimensional target object;

[0083] Determine the correspondence between the position of each sub-pixel and the position of the viewpoint;

[0084] Obtaining an angular spectrum boundary of the projection area corresponding to the sub-pixel according to the angular spectrum distribution of the projection area corresponding to the sub-pixel;

[0085] Determine the corresponding relationship between the angular spectrum position of the projection area corresponding to the sub-pixel and the sub-pixel;

[0086] Determine the viewer's eyebrow center coordinates and eye viewing angle to obtain corresponding image information;

[0087] According to the angle between the center of the eyebrows and each pixel island, the position of the pixel island corresponding to the center of the eyebrows is obtained, and the image information is loaded on the pixel island and the pixel islands located around the pixel island.

[0088] like Fig.10 As shown, the projection of the cylindrical lens directly facing the corresponding sub-pixel in space is the main lobe projection area 400, and the projection of the sub-pixel relative to other adjacent cylindrical lenses in space is a multi-level side lobe projection area 500. By splicing the main lobe projection area 400 and the side lobe projection area 500, a large number of continuous 3D viewpoints are formed, but the eyes fall into different lobe areas (refer to Fig.11 , Fig.11 In the figure, the horizontal axis is the light output angle, the vertical axis is the relative brightness, and the primary side lobe projection area 501 and the secondary side lobe projection area 502 are sequentially arranged on one side of the main lobe projection area 400), which will introduce viewpoint inversion, resulting in the situation that the 3D effect actually seen is inverted from the real world (viewpoint inversion means that the left eye sees the left view and the right eye sees the right view, which are fused into a normal 3D image through the brain, but the viewpoint inversion causes the left eye to see the right view and the right eye to see the left view, and the brain cannot fuse them into a correct 3D image, but an opposite or inverted image.), therefore, the visible space is also limited to the area corresponding to the same lobe area for both eyes, and the visible space is limited. In order to solve this problem, this embodiment provides a 3D display driving method based on human eye tracking and optical reverse tracing, which specifically includes the following steps:

[0089] A 3D target is provided, and actual image information obtained when a human eye is located at different positions to view the 3D target is determined (for example, if the human eye is located directly in front of the 3D target, a front view of the 3D target is obtained, and if the human eye is located at the side of the 3D target, a side view of the 3D target is obtained);

[0090] Determine the relationship between the viewpoint index and the physical index, that is, determine the correspondence between the position of each sub-pixel and the position of the viewpoint formed by the sub-pixel. For example, if a sub-pixel is labeled (1), then the corresponding viewpoint is labeled 1 and the correspondence is saved. Fig.12 , Fig.12 The corresponding index relationship between the sub-pixels and the corresponding viewpoints in one embodiment is shown (it should be noted that the corresponding index relationship between the sub-pixels and the corresponding viewpoints is not limited to Fig.12 shown).

[0091] It should be noted that, in this embodiment, the cylindrical lenses are arranged periodically, and a plurality of sub-pixels corresponding to one period form a pixel island. Fig.12 Only one period of sub-pixels is shown, that is, the corresponding index relationship between 11 sub-pixels and corresponding viewpoints corresponding to one period of sub-pixels in a pixel island is shown, and exemplarily, sub-pixels covered by the orthographic projection of multiple cylindrical lenses on the display panel within one period, and viewpoints in the main lobe projection area formed by the corresponding cylindrical lenses and viewpoints in the side lobe projection area;

[0092] The angular spectrum distribution of the projection area corresponding to the measured sub-pixel, each sub-pixel corresponds to a viewpoint, and each sub-pixel corresponds to a projection area, that is, the projection area corresponding to each sub-pixel has a different angle relative to the plane where the sub-pixel is located (parallel to the light emitting surface of the display panel). This step is to obtain the angle of the projection area corresponding to each sub-pixel relative to the plane where the sub-pixel is located, refer to Fig.13 , Fig.13 The horizontal axis is the light output angle, and the vertical axis is the relative brightness;

[0093] The angular spectrum boundary of the projection area corresponding to the sub-pixel is extracted, and the angle of the corresponding boundary of the projection area corresponding to each sub-pixel is obtained. It should be noted that: Fig.14 The numbers 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7 in the figure are sub-pixel numbers, which can correspond to Fig.12 (1) and (2) are only relative to Fig.12 Without brackets, reference Fig.14 , Fig.14 The horizontal axis is the light output angle, and the vertical axis is the relative brightness;

[0094] Establish a correspondence between the angular spectrum position of the projection area corresponding to the sub-pixel and the physical index of the sub-pixel. Specifically, divide the projection area corresponding to the sub-pixel into multiple angle intervals with a preset angle as a step size, and establish a correspondence between each angle interval and the corresponding sub-pixel, refer to the following table;

[0095]

[0096] The specific setting value of the preset angle can be set according to actual needs. The preset angle described in the above table is 0.02 degrees, corresponding to sub-pixel data group 1: the position of -70 degrees and the position of -69.98 in the projection area correspond to sub-pixel 3, and the position of -69.96 degrees, -69.94 degrees, -69.92 degrees, -69.90 degrees, and -69.88 degrees correspond to sub-pixel 4.

[0097] It should be noted that if in the first direction, the number of cylindrical lenses included in each cycle is the same, then when the projection area corresponding to the sub-pixel is divided into intervals with a preset angle as the step length, the labels of the sub-pixels corresponding to one angle in the projection area corresponding to the cylindrical lenses in different cycles are the same, and there is only one set of data. If the number of cylindrical lenses included in each cycle is different (for example, one cycle includes 2 cylindrical lenses and another cycle includes 3 lenses), when the projection area corresponding to the sub-pixel is divided into intervals with a preset angle as the step length, the labels of the sub-pixels corresponding to the same angle on the projection area formed by the cylindrical lenses in different cycles are different, and there will be different data groups (multiple cycles with the same number of cylindrical lenses correspond to the same data group), and the above table shows two groups of data, sub-pixel data group 1 and sub-pixel data group 2.

[0098] It should be noted that the sub-pixel numbers in the above table are the same as Fig.12 The numbers of the sub-pixels in the table correspond to each other, except that there are no brackets in this table, that is, -70 degrees corresponds to sub-pixel 3, which is equivalent to Fig.12 The sub-pixel (3) in .

[0099] Determine the image information viewed by the human eye (including left eye image information and right eye image information) according to the coordinates of the center of the eyebrows and the visual angle of the human eye;

[0100] Determine the eyebrow center coordinates and eye viewing angle of the viewer, obtain corresponding image information, and determine the image information corresponding to the eye position based on the eyebrow center coordinates and eye viewing angle. For example, if the eyebrow center coordinates are located on the side of the three-dimensional target, obtain the corresponding side view. Fig.17 FIG. 18 shows different images corresponding to different positions, and shows image information corresponding to the position of a human eye in one embodiment.

[0101] According to the angle between the center of the eyebrows and each pixel island (along the first direction, multiple cylindrical lenses are periodically arranged, and multiple sub-pixels corresponding to one period form a pixel island), and the visual angle of the human eye, the position of the pixel island corresponding to the center of the eyebrows is obtained; reference Fig.15 , Fig.15 A schematic diagram showing the angle between the coordinates of the center of the eyebrows and the center of each pixel island on the display panel 4 in the first direction;

[0102] Along the first direction, the pixel island corresponding to the center of the eyebrows and the pixel islands located around the pixel island are loaded with the corresponding image information. Fig.19 To load Fig.18 The image information in and display the obtained image,

[0103] Fig.16 Indicates the multiple sub-pixels corresponding to the Kth pixel island (1-11 shown in the figure are not in brackets, but are the same as Fig.12 The physical index of the sub-pixel in corresponds to that of the sub-pixel, for example, sub-pixel 1 is equivalent to sub-pixel (1), and a schematic diagram of loading image information is shown. Fig.16 A pixel island includes 11 sub-pixels, and 11 parallax images (views) are loaded for the 11 sub-pixels.

[0104] By adopting the above 3D display driving method, as the human eye moves, the corresponding image information is loaded to the sub-pixel corresponding to the human eye, so as to solve the problem of viewpoint inversion caused by the two eyes being located in different projection lobe areas, and at the same time increase the visual space. And by adopting the above 3D display driving method, when the human eye is located at different positions of the three-dimensional target, different viewing angle images will be obtained, that is, image information obtained at the actual viewing position will be obtained, for example, when the human eye is located in front of the three-dimensional target, the image of the front view will be obtained, and when the human eye is located on the side of the three-dimensional target, the side image of the three-dimensional target will be obtained, so as to restore the real world and enhance the user's 3D viewing experience.

[0105] Exemplarily, an embodiment of the present invention further provides a 3D display driving method, which is implemented by using the above-mentioned display device, wherein the display panel includes a plurality of sub-pixels, each sub-pixel is driven independently, and includes the following steps:

[0106] Determine the pupil coordinates of the human eye;

[0107] Determine, according to the pupil coordinates of the human eye, the position of the first sub-pixel that forms the viewpoint entering the human eye;

[0108] The first sub-pixel is lit up or the first sub-pixel and a preset number of sub-pixels around the first sub-pixel are lit up.

[0109] Due to the full-screen ultra-high resolution display, when all sub-pixels are lit, all projection viewpoints are open, and the pupil width of the human eye is only about 3mm, which will inevitably cause most viewpoint light to be unable to enter the human eye, resulting in a waste of power consumption. In order to solve this problem, the present invention is based on human eye tracking, and reverse tracking determines to light up only the first sub-pixel that can enter the human eye, or to light up the first sub-pixel and a preset number of sub-pixels around the first sub-pixel.

[0110] like Fig. 20 As shown, Fig. 20 The diagram shows the pupil of the human eye S through the corresponding cylindrical lens 1, and the corresponding area on the display panel 4. According to the law of refraction, n0sinθ1=nsinθ2, n0 is the refractive index of air, n is the refractive index of the cylindrical lens, θ1 is the incident angle of the human eye relative to the cylindrical lens, and θ2 is the refractive angle traced back to the light-emitting surface of the display panel. Only part of the sub-pixels are lit, thereby greatly reducing the overall power consumption of the display. Referring to the following table, if the number of sub-pixels corresponding to the viewpoint that can enter the human eye is 1-2 sub-pixels, when only 1 to 2 sub-pixels are turned on, there may be non-uniformity when viewed at a close distance. When 3 to 4 sub-pixels are turned on, the uniformity of the viewing picture is greatly improved, basically meeting the normal display requirements, and the power consumption at this time is only 34.7% of that of all sub-pixels being lit. Fig.21 As shown ( Fig.21 The vertical axis represents the power consumption and the horizontal axis represents the number of sub-pixels that are lit. That is, when only the first sub-pixel is turned on and the uniformity is poor, it can be considered to light up the first sub-pixel and a preset number of sub-pixels around the first sub-pixel, and the preset number can be set according to actual needs.

[0111]

[0112] The above table also shows that when the sub-pixels corresponding to the left eye are lit (the sub-pixels corresponding to the right eye are turned off), the crosstalk formed on the right eye viewpoint is that when 1-2 sub-pixels corresponding to the left eye are lit, the left eye brightness is 100%, and the right eye brightness is 0.5% of the left eye brightness, that is, the crosstalk to the right eye viewpoint is 0.5%; when 3-4 sub-pixels corresponding to the left eye are lit, the left eye brightness is 100%, and the right eye brightness is 1.6% of the left eye brightness, that is, the crosstalk to the right eye viewpoint is 1.6%; when all the sub-pixels corresponding to the left eye are lit, the left eye brightness is 100%, and the right eye brightness is 3.4% of the left eye brightness, that is, the crosstalk to the right eye viewpoint is 3.4%. The more sub-pixels that are lit, the higher the uniformity of the picture. However, compared with lighting all the sub-pixels corresponding to the left eye, in this embodiment, lighting some of the sub-pixels corresponding to the left eye not only reduces power consumption, but also reduces crosstalk to the right eye viewpoint.

[0113] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A 3D display device, comprising a display panel and a microlens array located on a light emitting surface of the display panel, characterized in that: The display panel includes a plurality of sub-pixels, sub-pixels of the same color are arranged along a first direction, and sub-pixels of different colors are arranged along a second direction perpendicular to the first direction, and the first direction is parallel to a line connecting the two eyes of the viewer; The microlens array includes a plurality of cylindrical lenses arranged along the first direction, the extension direction of the cylindrical lenses is parallel to the second direction, and in the first direction, each cylindrical lens covers M corresponding sub-pixels, where M is a natural number; Along the first direction, the plurality of cylindrical lenses are periodically arranged, each period includes two or more cylindrical lenses, and the projection areas corresponding to the plurality of cylindrical lenses in the same period are cross-complementary to form a continuous imaging surface; The number of the cylindrical lenses and the number of the sub-pixels in the same period are mutually prime; The number of sub-pixels corresponding to each cylindrical lens in the same period is obtained according to the following formula: m / N=a…b; M is the number of all sub-pixels corresponding to all the cylindrical lenses in the same period, and N is the number of the cylindrical lenses in the same period; b is less than N; Nb cylindrical lenses correspond to a sub-pixels, and the number of sub-pixels corresponding to b cylindrical lenses is a+1; The projection boundary of the first sub-pixel corresponding to one cylindrical lens in the same period is parallel to the projection boundary of the second sub-pixel in another cylindrical lens; The first sub-pixel is the first sub-pixel corresponding to the corresponding cylindrical lens, and the second sub-pixel is the first sub-pixel corresponding to the corresponding cylindrical lens.

2. The 3D display device according to claim 1, characterized in that: The plurality of cylindrical lenses in the same period include at least one first cylindrical lens, and the number of sub-pixels corresponding to the first cylindrical lens is different from the number of sub-pixels corresponding to the remaining cylindrical lenses in the same period.

3. The 3D display device according to claim 2, characterized in that: In the first direction, the first cylindrical lens is located at one side of the remaining cylindrical lenses in the same period.

4. The 3D display device according to claim 1, characterized in that: One period includes N cylindrical lenses, each sub-pixel includes an opening area and a non-opening area, and in the first direction, the width of the opening area is 1 / N of the width of the sub-pixel.

5. The 3D display device according to claim 4, characterized in that: The number of the sub-pixels in one period is m, and in the first direction, the widths of the plurality of cylindrical lenses are the same, and in the first direction, the width of each cylindrical lens is m times the width of the opening area, where m is a natural number.

6. The 3D display device according to claim 4, characterized in that: Along the first direction, the orthographic projections of different cylindrical lenses located in the same period on the display panel are sequentially shifted by a first width, and the first width is equal to the width of the opening area.

7. The 3D display device according to claim 1, characterized in that: The number of cylindrical lenses in different periods is the same.

8. The 3D display device according to claim 1, characterized in that: The plurality of cylindrical lenses arranged periodically include at least one first period, and the number of cylindrical lenses in the first period is different from the number of cylindrical lenses in other periods other than the first period.

9. The 3D display device according to claim 1, characterized in that: The light emitting surface of the display panel is located on the focal plane of the cylindrical lens.

10. The 3D display device according to claim 9, characterized in that: The distance H between the cylindrical lens and the display panel satisfies the following formula: H=n*f, wherein n is the refractive index of the medium between the light emitting surface and the cylindrical lens, and f is the focal length of the cylindrical lens.

11. A 3D display driving method, characterized in that: The 3D display device according to any one of claims 1 to 10 is used to implement the method, wherein along the first direction, a plurality of cylindrical lenses are periodically arranged, and a plurality of sub-pixels corresponding to one period form a pixel island, and the method comprises the following steps: Providing a three-dimensional target object, and determining actual image information obtained when human eyes are located at different positions viewing the three-dimensional target object; Determine the correspondence between the position of each sub-pixel and the position of the viewpoint; Obtaining an angular spectrum boundary of the projection area corresponding to the sub-pixel according to the angular spectrum distribution of the projection area corresponding to the sub-pixel; Determine the corresponding relationship between the angular spectrum position of the projection area corresponding to the sub-pixel and the sub-pixel; Determine the viewer's eyebrow center coordinates and eye viewing angle to obtain corresponding image information; According to the angle between the center of the eyebrows and each pixel island, the position of the pixel island corresponding to the center of the eyebrows is obtained, and the image information is loaded on the pixel island and the pixel islands located around the pixel island.

12. A 3D display driving method, characterized in that: The method is implemented by using the 3D display device according to any one of claims 1 to 10, and comprises the following steps: Determine the pupil coordinates of the human eye; Determine, according to the pupil coordinates of the human eye, the position of the first sub-pixel that forms the viewpoint entering the human eye; The first sub-pixel is lit, or the first sub-pixel and a preset number of sub-pixels around the first sub-pixel are lit.

Images