Stereoscopic display device and control method thereof

Abstract

A stereoscopic display device (100) and a control method thereof. The display device (100) comprises a display substrate (10), the display substrate (10) comprising a substrate (11) and a plurality of pixel units (12) arranged on the substrate (11), the plurality of pixel units (12) being arranged in an array in a first direction X and a second direction Y, the first direction X and the second direction Y intersecting; a lenticular lens array (20) located on the light-emitting side of the display substrate (10); and a controller configured to determine a mapping period according to the relative positional relationship between the human eye, the lenticular lens array (20) and the display substrate (10), and according to the refraction of the light emitted by the plurality of pixel units (12) by the lenticular lens array (20); and control the plurality of pixel units (12) to periodically display a left-eye image and a right-eye image respectively at the determined mapping period.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, in particular, to a stereoscopic display device and a control method thereof. BACKGROUND

[0002] Naked-eye 3D stereoscopic display technology has very important application in the field of display, which can bring more realistic display effect, therefore, naked-eye 3D stereoscopic display technology is a direction of focus of research institutions and display technology companies, and has a relatively broad application market for medical imaging, education and teaching, virtual reality, etc. Naked-eye 3D display has problems such as crosstalk ghosting in display quality due to factors such as manufacturing process and manufacturing cost, which greatly limits the large-scale application of naked-eye 3D products. SUMMARY

[0003] In order to solve at least one aspect of the above problem, the embodiments of the present disclosure provide a stereoscopic display device and a control method thereof, which can at least weaken or eliminate the crosstalk problem of the naked-eye stereoscopic display device, thereby improving the display effect.

[0004] In one aspect, a stereoscopic display device is provided, wherein the stereoscopic display device comprises:

[0005] a display substrate comprising a substrate and a plurality of pixel units disposed on the substrate, the plurality of pixel units being arranged in an array in a first direction and a second direction, wherein the first direction and the second direction intersect;

[0006] a lenticular lens array located on an out-light side of the display substrate; and

[0007] a controller configured to: determine a pattern period according to a relative position relationship among a human eye, the lenticular lens array and the display substrate, and according to refraction of light emitted by the plurality of pixel units by the lenticular lens array; and control the plurality of pixel units to periodically display a left-eye image and a right-eye image respectively with the determined pattern period.

[0008] In some example embodiments of the present disclosure, the lenticular lens array comprises a plurality of lenticular lenses arranged along the first direction;

[0009] a same design point on a same lenticular lens corresponds to a first out-light point and a second out-light point on the out-light side of the display substrate respectively, wherein light emitted from the first out-light point and incident on the design point can enter the human eye after refraction by the lenticular lens, and the second out-light point, the design point and the human eye are located on a same straight line; and

[0010] The controller is configured to determine the arrangement period such that a distance between the first light exit point and the second light exit point in a first direction is less than or equal to a specified value, so as to avoid crosstalk between images displayed by two adjacent arrangement units, wherein the arrangement unit includes at least one pixel unit displaying a left-eye image or a right-eye image, and a plurality of the arrangement units are periodically arranged in the first direction with the arrangement period as a period.

[0011] In some example embodiments of the present disclosure, the controller is configured to determine a plurality of arrangement periods, the column lens array includes a plurality of column lenses arranged along a first direction, and the plurality of arrangement periods correspond to the plurality of column lenses one by one; and

[0012] The arrangement periods corresponding to the at least two column lenses are different.

[0013] In some example embodiments of the present disclosure, the plurality of column lenses include a center column lens, a left-side column lens, and a right-side column lens, the center column lens is a column lens for a human eye, and the left-side column lens and the right-side column lens are two column lenses closest to edges of the display substrate in the first direction, respectively; and

[0014] The arrangement periods corresponding to the column lenses in a first group of column lenses are different from each other, and / or the arrangement periods corresponding to the column lenses in a second group of column lenses are different from each other, wherein the first group of column lenses includes column lenses arranged continuously in the first direction from the center column lens to the left-side column lens, and the second group of column lenses includes column lenses arranged continuously in the first direction from the center column lens to the right-side column lens.

[0015] In some example embodiments of the present disclosure, the arrangement periods corresponding to the column lenses in the first group of column lenses are linearly and continuously changed, and / or the arrangement periods corresponding to the column lenses in the second group of column lenses are linearly and continuously changed.

[0016] In some example embodiments of the present disclosure, the arrangement periods corresponding to the column lenses in the first group of column lenses are linearly decreased, and / or the arrangement periods corresponding to the column lenses in the second group of column lenses are linearly decreased.

[0017] In some example embodiments of the present disclosure, the arrangement periods corresponding to the column lenses in the first group of column lenses are non-linearly and continuously changed, and / or the arrangement periods corresponding to the column lenses in the second group of column lenses are non-linearly and continuously changed.

[0018] In some example embodiments of the present disclosure, the arrangement periods corresponding to the column lenses in the first group of column lenses are non-linearly decreased, and / or the arrangement periods corresponding to the column lenses in the second group of column lenses are non-linearly decreased.

[0019] In some example embodiments of the present disclosure, the controller is configured to determine a plurality of arrangement periods, the column lens array comprises a plurality of column lenses arranged along a first direction, and the plurality of arrangement periods correspond to the plurality of column lenses one by one; and

[0020] The arrangement periods corresponding to the at least two column lenses are the same.

[0021] In some example embodiments of the present disclosure, the arrangement periods corresponding to the respective column lenses are all the same as each other.

[0022] In some example embodiments of the present disclosure, the arrangement period corresponding to each column lens is less than the arrangement period determined by formula (1):

[0023]

[0024] wherein E z is a viewing distance of the human eye from the stereoscopic display device, P is a pitch of adjacent column lenses, and h is an equivalent air gap of the column lens and the display unit.

[0025] In some example embodiments of the present disclosure, the plurality of column lenses comprises a center column lens, a first intermediate column lens, a second intermediate column lens, a left column lens, and a right column lens, the center column lens is one column lens for the human eye, the left column lens and the right column lens are respectively two column lenses closest to the edges of the display substrate in the first direction, the first intermediate column lens and the second intermediate column lens are respectively located on both sides of the center column lens, the first intermediate column lens is located between the center column lens and the left column lens, and the second intermediate column lens is located between the center column lens and the right column lens; and

[0026] The arrangement period corresponding to each column lens in the first group of column lenses is a first arrangement period, and the arrangement period corresponding to each column lens in the second group of column lenses is a second arrangement period, wherein the first arrangement period is different from the second arrangement period, the first group of column lenses comprises each column lens arranged continuously in the first direction from the first intermediate column lens to the second intermediate column lens, and the second group of column lenses comprises each column lens arranged continuously in the first direction from the first intermediate column lens to the left column lens and each column lens arranged continuously in the first direction from the second intermediate column lens to the right column lens.

[0027] In some example embodiments of the present disclosure, the first arrangement period is greater than the second arrangement period.

[0028] In some exemplary embodiments of the present disclosure, the display device further includes: an eye tracking module for tracking the position of a human eye;

[0029] The controller is further configured to determine the relative positional relationship between the human eye, the cylindrical lens array, and the display substrate according to the tracked position of the human eye.

[0030] In some exemplary embodiments of the present disclosure, the controller is further configured to:

[0031] Determining the image arrangement period and the image arrangement period change rate at multiple preset viewing distances respectively;

[0032] Establishing a mapping relationship between the image arrangement period change rate and each cylindrical lens at each preset viewing distance;

[0033] Obtain the position of the human eye in real time to determine the real-time viewing distance;

[0034] Determining the mapping relationship between the image arrangement period change rate and each cylindrical lens at a preset viewing distance closest to the determined real-time viewing distance as the mapping relationship between the image arrangement period change rate and each cylindrical lens at the real-time viewing distance; and

[0035] According to the determined image arrangement period change rate at the real-time viewing distance and the mapping relationship between the cylindrical lenses, the image arrangement period corresponding to each cylindrical lens at the real-time viewing distance is calculated.

[0036] In some exemplary embodiments of the present disclosure, the pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses is linearly negatively correlated with a first distance, wherein the first distance is the distance between each cylindrical lens in the first group of cylindrical lenses and the central cylindrical lens; and / or,

[0037] The pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses is linearly negatively correlated with the second distance, wherein the second distance is the distance between each cylindrical lens in the second group of cylindrical lenses and the central cylindrical lens.

[0038] In some exemplary embodiments of the present disclosure, the linear correlation determined by the controller satisfies the following formula:

[0039]

[0040] Where α is the correction coefficient, Δx min is the pattern arrangement period corresponding to the maximum allowable pitch of the cylindrical lenses, and k is the number of distances between the first group of cylindrical lenses or the second group of cylindrical lenses and the central cylindrical lens.

[0041] In some example embodiments of the present disclosure, the pitch of the arrangement pattern corresponding to each of the column lenses in the first group of column lenses is the pitch of two arrangement units corresponding to two adjacent column lenses; and / or,

[0042] the pitch of the arrangement pattern corresponding to each of the column lenses in the second group of column lenses is the pitch of two arrangement units corresponding to two adjacent column lenses.

[0043] In some example embodiments of the present disclosure, the pitch of the arrangement pattern corresponding to each of the column lenses in the first group of column lenses and / or the pitch of the arrangement pattern corresponding to each of the column lenses in the second group of column lenses satisfies the following formula:

[0044]

[0045] Δx=y k (k)-y k (k-1)

[0046] wherein P is the pitch of the adjacent column lenses, h is the equivalent air gap between the column lens and the display unit, n is the ratio of the refractive index n2 of the column lens to the refractive index n1 of the first medium layer, E x is the distance between the human eye and the center column lens in the first direction.

[0047] In some example embodiments of the present disclosure, the distance y k between the design point of the column lens and the center column lens satisfies the following formula:

[0048] y k (k)=k×P+hntanθ2

[0049] wherein θ2 represents the angle between the light ray and the normal in the column lens.

[0050] In some example embodiments of the present disclosure, the distance y no between the design point of the column lens and the center column lens satisfies the following formula:

[0051] y no (k)=(k-1)×Δx+E x modΔx; E x > 0

[0052] y no (k)=k×Δx+E x modΔx; E x < 0

[0053] wherein E x is the distance between the human eye and the center column lens in the first direction.

[0054] In some exemplary embodiments of the present disclosure, the distance between the first light exit point corresponding to the design point of the cylindrical lens and the central cylindrical lens, the first pattern arrangement period Δx1 of the first group of cylindrical lenses, and the second pattern arrangement period Δx2 of the second group of cylindrical lenses satisfy the following formula:

[0055]

[0056] Wherein, M is the specified value, k max is the number of cylindrical lenses from the central cylindrical lens to the first intermediate cylindrical lens or the second intermediate cylindrical lens, Δx1 is the pattern arrangement period corresponding to the first group of cylindrical lenses, and Δx2 is the pattern arrangement period corresponding to the second group of cylindrical lenses.

[0057] Another aspect of the present disclosure provides a control method for a stereoscopic display device, the stereoscopic display device comprising: a display substrate, the display substrate comprising a base substrate and a plurality of pixel units disposed on the base substrate, the plurality of pixel units being arranged in an array in a first direction and a second direction, wherein the first direction and the second direction intersect; and a cylindrical lens array, the cylindrical lens array being located on a light-emitting side of the display substrate, wherein the control method comprises:

[0058] Determining a pattern arrangement period according to a relative positional relationship among a human eye, a cylindrical lens array, and a display substrate, and according to a refraction condition of light emitted by the plurality of pixel units by the cylindrical lens array; and

[0059] The plurality of pixel units are controlled to periodically display the left-eye image and the right-eye image according to the determined image arrangement period.

[0060] In some exemplary embodiments of the present disclosure, the control method further includes:

[0061] Tracking eye position; and

[0062] According to the tracked position of the human eye, the relative position relationship among the human eye, the cylindrical lens array and the display substrate is determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Other objects and advantages of the present disclosure will become apparent from the following description of the present disclosure with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present disclosure.

[0064] Other objects and advantages of the present disclosure will become apparent from the following description of the present disclosure with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present disclosure.

[0065] FIG. 1A Schematically shows a three-dimensional structure diagram of a three-dimensional display substrate according to an exemplary embodiment of the present disclosure;

[0066] FIG. 1B FIG. 6 schematically shows a relationship between an actual pitch period and a theoretical pitch period of a stereoscopic display substrate according to an example embodiment of the present disclosure;

[0067] FIG. 1C FIG. 7 schematically shows a refractive diagram of a lenticular lens of a stereoscopic display substrate according to an example embodiment of the present disclosure;

[0068] FIG. 1D FIG. 8 schematically shows a variation curve of a difference between an actual pitch period and a theoretical pitch period of a stereoscopic display substrate according to an example embodiment of the present disclosure;

[0069] FIG. 1E FIG. 9 schematically shows a variation of an actual pitch period and a theoretical pitch period in a first direction and a third direction of a stereoscopic display substrate according to an example embodiment of the present disclosure;

[0070] FIG. 2A FIG. 10 schematically shows a cross-sectional structure of a stereoscopic display substrate according to an example embodiment of the present disclosure;

[0071] FIG. 2B FIG. 11 schematically shows a variation curve of a number of lenticular lenses and a theoretical pitch period of a stereoscopic display substrate according to an example embodiment of the present disclosure;

[0072] FIG. 2C and FIG. 2D FIG. 12 schematically shows a contrast diagram of crosstalk elimination of a stereoscopic display substrate according to an example embodiment of the present disclosure;

[0073] FIG. 3A FIG. 13 schematically shows a cross-sectional structure of a stereoscopic display substrate according to another example embodiment of the present disclosure;

[0074] FIG. 3B FIG. 14 schematically shows a variation of a pitch period of a stereoscopic display substrate with a position of a human eye according to an example embodiment of the present disclosure;

[0075] FIG. 3C FIG. 15 schematically shows a variation curve of a comparison of a plurality of pitch periods of a stereoscopic display substrate according to another example embodiment of the present disclosure;

[0076] FIG. 4A FIG. 16 schematically shows a cross-sectional structure of a stereoscopic display substrate according to yet another example embodiment of the present disclosure;

[0077] FIG. 4B FIG. 17 schematically shows a diagram of a variation of a pitch period with a number (i.e., a position) of lenticular lenses in consideration of a refractive effect of the lenticular lenses;

[0078] FIG. 5ASchematically showing a graph of crosstalk rate versus number of cylindrical lenses (i.e., position) for several exemplary cases, wherein schematically showing a comparison between a change in crosstalk rate under a linearly continuously changing pattern arrangement period and a change in crosstalk rate under a fixed pattern arrangement period;

[0079] FIG. 5B Schematic diagrams of crosstalk rate versus number (i.e., position) of cylindrical lenses for several exemplary cases are shown, wherein a comparison of changes in crosstalk rate under one pattern arrangement period, two pattern arrangement periods, and a pattern arrangement period with a linear and continuous change is schematically shown, taking into account the refraction effect of the cylindrical lenses.

[0080] FIG. 6 A schematic diagram schematically showing a curve of the arrangement period of the cylindrical lenses at different viewing distances versus the number of cylindrical lenses (ie, positions) of the cylindrical lenses of a stereoscopic display substrate according to an exemplary embodiment of the present disclosure; and

[0081] FIG. 7 The flowchart schematically shows a method for controlling a stereoscopic display substrate according to an exemplary embodiment of the present disclosure.

[0082] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of layers, structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0083] The technical solution of the present disclosure is further described in detail below through examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to explain the overall inventive concept of the present disclosure and should not be construed as limiting the present disclosure.

[0084] Furthermore, in the following detailed description, for ease of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it will be apparent that one or more embodiments can be practiced without these specific details.

[0085] It should be noted that although the terms "first," "second," etc. may be used herein to describe various parts, components, elements, regions, layers, and / or portions, these parts, components, elements, regions, layers, and / or portions should not be limited by these terms. Rather, these terms are used to distinguish one part, component, element, region, layer, and / or portion from another. Thus, for example, the first part, first member, first element, first region, first layer, and / or first portion discussed below may be referred to as a second part, second member, second element, second region, second layer, and / or second portion without departing from the teachings of the present disclosure.

[0086] For ease of description, spatially relative terms, such as "upper", "lower", "left", "right", and the like, can be used herein for the purpose of illustrating one element or feature's relationship to another element or feature, as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the figures. For example, if a device is inverted, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Likewise, if a device is inverted, elements described as "above" other elements or features would then be oriented "below" the other elements or features.

[0087] In this document, the terms "substantially", "approximately", "about", "generally", and other similar terms are used as terms of approximation, and not as terms of degree, and they are intended to account for the inherent deviations in measured or calculated values that would be recognized by those of ordinary skill in the art. Taking into account process fluctuations, measurement difficulties, and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), etc., "about" or "approximately," as used herein includes the stated value and means a range of values determined by those of ordinary skill in the art to be acceptable for the particular value. For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0088] It is noted that, in this document, the expression "same layer" refers to a layer structure formed by using the same film formation process to form a film layer for forming a specific pattern, and then patterning the film layer by a one-time patterning process using the same mask plate. Depending on the specific pattern, the one-time patterning process can include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure can be continuous or discontinuous. That is, the plurality of elements, components, structures and / or portions located in the "same layer" are composed of the same material and are formed by the same one-time patterning process, and generally, the plurality of elements, components, structures and / or portions located in the "same layer" have substantially the same thickness.

[0089] It will be understood by those skilled in the art that, in this document, unless otherwise stated, the expression "continuous extension", "one-piece structure", "integral structure" or similar expressions mean that the plurality of elements, components, structures and / or portions are located in the same layer and are generally formed by the same one-time patterning process in the manufacturing process, and there is no gap or break between the elements, components, structures and / or portions, but they are a continuous structure.

[0090] In this document, the directional expressions "first direction", "second direction" are used to describe different directions along the pixel area, such as the longitudinal direction and the transverse direction of the pixel area. It will be understood that such expressions are merely exemplary descriptions and are not a limitation on the present disclosure.

[0091] In this article, the term "periodic pixel width" refers to the width of the image or picture displayed on the display unit after being refracted by one of the cylindrical lenses of the cylindrical lens array and entering the observer's left eye or right eye. Each periodic pixel width refers to the width of the display unit that can be observed by the observer's left eye or right eye through a cylindrical lens, where the images or pictures seen by the left eye and the right eye are displayed alternately on the display unit.

[0092] In this document, the term "design point" refers to a certain point on the cylindrical lens, which is used to set the pitch of the cylindrical lens. For example, the design point is the midpoint of the cylindrical lens.

[0093] The term "patterning period" refers to the width of a pixel in a display unit as seen by the human eye through a cylindrical lens on a display substrate. In the embodiments of the present disclosure, the patterning period is related to the angle between the human eye and the cylindrical lens. Depending on the viewing angle of the human eye relative to the cylindrical lens, the width of the pixel in the display unit as seen through the cylindrical lens also varies.

[0094] The 3D display devices currently on the market all have crosstalk and ghosting issues, especially in the wide viewing angle area. This results in a smaller optimal viewing angle.

[0095] Existing methods have reduced crosstalk to some extent, but none of them can solve the crosstalk problem at close distances and wide viewing angles. Furthermore, the viewing distance is limited, and the optimal viewing angle is small. A small viewing angle means that the viewer must be within a small horizontal distance from the screen to see the best image; exceeding this range results in poor viewing quality. The limited viewing distance also means that the viewer cannot be too close to the stereoscopic display, significantly reducing the user experience.

[0096] In order to solve the above problems, an embodiment of the present disclosure provides a stereoscopic display device, wherein the stereoscopic display device includes but is not limited to: a display substrate, the display substrate including a base substrate and a plurality of pixel units arranged on the base substrate, the plurality of pixel units being arranged in an array in a first direction and a second direction, wherein the first direction and the second direction intersect; a cylindrical lens array, the cylindrical lens array being located on the light-emitting side of the display substrate; and a controller, the controller being configured to: determine an arrangement period according to the relative positional relationship between a human eye, the cylindrical lens array and the display substrate, and according to the refraction of light emitted by the cylindrical lens array to the plurality of pixel units; and control the plurality of pixel units to periodically display a left-eye image and a right-eye image respectively according to the determined arrangement period.

[0097] According to an embodiment of the present disclosure, by setting a controller, the relative position relationship between the human eye, the column lens array and the display substrate is controlled, the arrangement period of the plurality of pixel units is controlled, so that the human eye can have the best viewing experience in each position, the crosstalk generated when the human eye views is reduced, and the display effect is improved.

[0098] The following specifically describes the naked eye 3D display substrate according to an embodiment of the present disclosure. FIGS. 1A-7 The naked eye 3D display substrate according to an embodiment of the present disclosure is specifically described.

[0099] FIG. 1A A schematic diagram of a stereoscopic structure of a stereoscopic display substrate according to an exemplary embodiment of the present disclosure is shown. FIG. 1B A schematic diagram of the relationship between the actual arrangement period and the theoretical arrangement period of a stereoscopic display substrate according to an exemplary embodiment of the present disclosure is shown. FIG. 1C A schematic diagram of the refraction of a column lens of a stereoscopic display substrate according to an exemplary embodiment of the present disclosure is shown. FIG. 1D A schematic diagram of the difference curve between the actual arrangement period and the theoretical arrangement period of a stereoscopic display substrate according to an exemplary embodiment of the present disclosure is shown. FIG. 1E A schematic diagram of the actual arrangement period and the change in the first direction and the third direction of a stereoscopic display substrate according to an exemplary embodiment of the present disclosure is shown. FIG. 2A A schematic diagram of the cross-sectional structure of a stereoscopic display substrate according to an embodiment of the present disclosure is shown.

[0100] As shown in FIG. 1A and FIG. 2A , the stereoscopic display substrate 100 includes a display substrate 10, a column lens array 20 arranged on the light-emitting side of the display substrate 10, and a first medium layer 30 arranged between the display substrate 10 and the column lens array 20. The first medium layer 30 is used to bond the display substrate 10 and the column lens array 20, and at the same time to have a suitable spacing between the display substrate 10 and the column lens array 20, so that the picture displayed by the pixel units on the display substrate 10 can be displayed on the left eye or the right eye of the human eye through the column lens array 20. As shown in FIG. 2A , the stereoscopic display substrate 100 can further include a second medium layer 40 and an encapsulation layer 50. The second medium layer 40 can be the same material as the first medium layer 30, or can be another medium material, for example, the second medium layer 40 can be a low refractive index material, and the encapsulation layer 50 is used to encapsulate and protect the stereoscopic display device 100, to prevent the internal film layer of the stereoscopic display device from being damaged by the environment. In other optional embodiments, at least one of the second medium layer 40 and the encapsulation layer 50 can be selectively arranged.

[0101] The display substrate includes a substrate 11 and a plurality of pixel units 12 arranged on the substrate, the pixel units are arranged in an array in a first direction X and a second direction Y, the first direction X and the second direction Y intersect. And the display substrate 10, the column lens array 20 are arranged in a third direction Z.

[0102] The technical principle of the present application will be described in detail below. FIGS. 1B-1E The technical principle of the present application will be described in detail below.

[0103] In the process of displaying the display device 100, the column lens array included in the display device and the medium between the column lens and the display substrate exist refraction, which causes the actual light path to be different from the designed light path, thereby causing serious crosstalk under large viewing angle at close distance. In combination with FIG. 1B And FIG. 2A It can be seen that the column lens array 20 includes a plurality of column lenses 21 arranged along the first direction X, the length direction of the plurality of column lenses is along the second direction Y, and the same design point 01 on the same column lens corresponds to the first light exit point E1 and the second light exit point E2 on the light exit surface of the display substrate respectively, the light emitted from the first light exit point E1 is incident on the design point 01 and can enter the human eye L (for example, the left eye) after refraction of the column lens 21, and the second light exit point E2, the design point 01 and the human eye L are located on the same straight line.

[0104] When designing the arrangement period of the display device, the influence of the refractive index of the column lens and the medium around the column lens is generally not considered in the design, and thus the arrangement period Δx (theoretical arrangement period) of the general design is different from the arrangement period Δx' (actual arrangement period) considering the influence of the refractive index of the column lens and the medium around the column lens. As shown in FIG. 1B (b), the first light exit point E1 is a certain light exit point corresponding to the left eye considering the influence of the column lens refraction, and the second light exit point E2 is a certain light exit point corresponding to the left eye without considering the influence of the lens refractive index. There is a difference C between the theoretical arrangement period Δx and the actual arrangement period Δx', and as shown in FIG. 1D , the difference C increases as the distance between the column lens and the human eye increases. Therefore, when the viewing angle distance is large, because the theoretical arrangement period Δx is different from the actual arrangement period Δx', when the human eye sees other pixels of large viewing angle, crosstalk is generated, which reduces the display effect of the display device. In order to reduce the crosstalk, it is necessary to reduce the difference C between the theoretical arrangement period Δx and the actual arrangement period Δx' displayed on the display device as much as possible.

[0105] Because the refraction of the lens and the medium around the lens can cause serious crosstalk at close distance, in order to determine the refractive image caused by the distance between the human eye and the display device, all the actual arrangement periods in the distance [450mm, 1100mm] and the angle range of the viewing angle [-25°, 25°] are determined, as shown in FIG. 1EAs shown, at close distances, the actual pattern arrangement periods at small and large viewing angles change steeply, with a large phase difference, resulting in severe crosstalk at close distances. Therefore, the display device disclosed herein improves crosstalk at close distances, for example, close distance may be within a range of 450mm to 1100mm. In other small-screen application scenarios, as screen resolution increases, the pixels of the display unit become smaller, meaning the spacing between pixels becomes smaller. Changes in the refractive index are more likely to cause crosstalk, such as smaller changes in viewing angle or eye position, which can also lead to crosstalk between pixels.

[0106] It should be noted that in FIG. 1E In the illustrated embodiment, the "viewing angle [-25°, 25°]" indicates that, when the viewer is standing directly facing the middle number of cylindrical lenses, the viewing angle is 0° when the viewer's gaze is directly facing the middle number of cylindrical lenses, for example, approximately 5,000 cylindrical lenses. When the viewer's gaze is directly facing the cylindrical lenses on either side, for example, approximately 0 cylindrical lenses, the viewing angle is -25°, and when the viewer is facing approximately 10,000 cylindrical lenses, the viewing angle is 25°. It should be noted that this description is for illustrative purposes only; the viewing angle can vary with changes in the viewer's position or the number of main lenses.

[0107] Thus, the display device of the present disclosure is provided with a controller, and the controller is configured to determine the arrangement period so that the distance between the first light exit point E1 and the second light exit point E2 in the first direction X is less than or equal to a specified value, so as to avoid crosstalk between the images displayed by the two adjacent arrangement units. The arrangement unit includes at least one pixel unit that displays a left-eye image or a right-eye image, and a plurality of the arrangement units are periodically arranged in the first direction with the arrangement period as a period. For example, the controller can be an FPGA, so that a better processing effect can be achieved based on a lower computing cost. That is, the controller of the present disclosure controls the pixel units on the display substrate of the display device so that the difference C between the theoretical arrangement period Δx and the actual arrangement period Δx' displayed by the pixel units of the display substrate is less than a specified value, thereby effectively eliminating the crosstalk of the display device.

[0108] In some embodiments of the present disclosure, the specified value may be, for example, a crosstalk limit M determined based on actual display conditions. For example, the crosstalk limit M is associated with the width of the pixel unit in the first direction. For example, when the distance between the first light exit point E1 and the second light exit point E2 in the first direction is greater than the crosstalk limit M, it is considered that the image seen by the human eye generates crosstalk. If the distance is less than or equal to the crosstalk limit M, it is considered that the image seen by the human eye does not generate crosstalk. In this embodiment, the crosstalk limit M may be, for example, 2 / 3 of the width of the pixel unit in the first direction, that is, M = 2 / 3 pixel.

[0109] In some embodiments of the present disclosure, the controller may determine a plurality of image arrangement periods according to the relative positional relationship among the human eye, the cylindrical lens array, and the display substrate, and the plurality of image arrangement periods correspond one-to-one to the plurality of cylindrical lenses.

[0110] For example, the arrangement period Δx of the display device can be calculated using the following formula (1):

[0111]

[0112] Where P represents the horizontal width of a cylindrical lens or the pitch between adjacent cylindrical lenses. Ez represents the position coordinate of the human eye in the third direction Z, that is, the distance between the human eye and the display device. h represents the equivalent air layer placement height of the cylindrical lens array.

[0113] In this embodiment, the position coordinates of the human eye and the display device in the third direction Z are Ez, and the coordinates of the first direction X, the second direction Y, and the third direction Z of the position of the human eye (for example, the left eye L) are determined as (0, 0, Ez). As the distance between the cylindrical lens and the human eye in the first direction X increases, as shown in FIG. FIG. 1B As shown in (a) and (b) in FIG, the distance between the first light exit point E1 and the second light exit point E2 corresponding to the design point of the cylindrical lens in the first direction X increases. In order to prevent the occurrence of crosstalk, the controller controls the arrangement period corresponding to each cylindrical lens of the display device so that the distance between the first light exit point E1 and the second light exit point E2 in the first direction X is less than or equal to a specified value. That is, the first light exit point, the second light exit point, and the specified value M satisfy the following formula (2):

[0114]

[0115] Among them, the cylindrical lens corresponding to the human eye position is the central cylindrical lens, y k (k) represents the distance in the first direction between the first light-emitting point E1 corresponding to the design point of the k-th cylindrical lens and the central cylindrical lens corresponding to the position of the human eye, y no (k) represents the distance in the first direction between the second light-emitting point E2 corresponding to the design point of the k-th cylindrical lens and the central cylindrical lens corresponding to the position of the human eye. In the embodiment of the present disclosure, when rate(k) is always less than or equal to 1, it can be considered that when the human eye is within the above-mentioned coordinate range, the display device will not generate crosstalk.

[0116] like FIG. 1B and FIG. 1C As shown, y k (k) can be calculated using formula (3):

[0117] y k (k)=k×P+hntanθ2 Formula (3)

[0118] wherein P represents the horizontal width of a cylindrical lens or the pitch of adjacent cylindrical lenses, and h represents the equivalent air layer placement height of the cylindrical lens array, as shown in FIG. 1B As shown in (b) of FIG. 1, h can be determined according to the calculation of the distance h' between the cylindrical lens array and the display substrate, and n is the ratio of the refractive index n2 of the lens to the refractive index n1 of the medium surrounding the lens. As shown in FIG. 1B and FIG. 1C As shown in (b) of FIG. 1, h can be determined according to the calculation of the distance h' between the cylindrical lens array and the display substrate, and n is the ratio of the refractive index n2 of the lens to the refractive index n1 of the medium surrounding the lens. As shown in

[0119] According to the transformation of formula (3) by formula (4) and formula (5), formula (6) can be obtained:

[0120] sinθ1×n1=sinθ2×n2 formula (4)

[0121]

[0122]

[0123] y no (k) represents the distance between the second light exit point corresponding to the design point of the kth cylindrical lens and the position of the human eye in the first direction, which can be calculated according to formula (7) and formula (8) as follows:

[0124] y no (k)=(k-1)×Δx+E x modΔx;E x >0 formula (7)

[0125] y no (k)=k×Δx+E x modΔx;E x <0 formula (8)

[0126] wherein E x represents the distance between the kth cylindrical lens and the center cylindrical lens corresponding to the human eye.

[0127] FIG. 2A A cross-sectional structure schematic diagram of a stereoscopic display substrate of one embodiment of the present disclosure is schematically shown. FIG. 2B A curve diagram showing the change of the number of cylindrical lenses and the theoretical layout period of a stereoscopic display substrate of one embodiment of the present disclosure is schematically shown. FIG. 2C A contrast diagram for eliminating crosstalk of a stereoscopic display substrate of an exemplary embodiment of the present disclosure is schematically shown.

[0128] The display device of the embodiments of the present disclosure will be described in detail below. FIG. 2A The display device of the embodiments of the present disclosure will be described in detail below.

[0129] In one example embodiment of the present disclosure, the controller is configured to determine a plurality of arrangement periods Δx, the column lens array includes a plurality of column lenses arranged along a first direction, the plurality of arrangement periods correspond to the plurality of column lenses one by one, and the arrangement periods corresponding to at least two column lenses are the same. That is, the arrangement periods corresponding to the plurality of column lenses arranged along the first direction can all be the same, or the arrangement periods corresponding to some column lenses can be the same and the arrangement periods corresponding to other column lenses can be different.

[0130] As shown in FIG. 2A , the stereoscopic display substrate 100 includes a display substrate 10, a column lens array 20, a first dielectric layer 30, a second dielectric layer 40, and an encapsulation layer 50. The stereoscopic display substrate includes a center column lens facing the human eye and left and right column lenses 202 and 203 located on both sides of the stereoscopic display substrate.

[0131] For example, the arrangement period of the column lens without considering refraction is calculated using the above formula (1), for example, the human eye is at the center column lens of the display substrate, the distance Ez between the human eye and the display substrate is 700 mm, and the coordinates of the human eye are (0, 0, 700 mm), as shown in FIG. 2B , the known column lens array of the display device includes 5000 column lenses, which are arranged and distributed from the left side of the display substrate to the right side of the display substrate in the first direction X, and the 2500th column lens is the center column lens. As the distance between the column lens and the human eye in the first direction X increases from the center column lens towards both sides, the difference between the actual arrangement period Δx' and the theoretical arrangement period Δx becomes larger and larger. In order to reduce the difference between the actual arrangement period Δx' and the theoretical arrangement period Δx on both sides and in the middle, the arrangement period corresponding to the column lens can be fixedly set, that is, the arrangement periods corresponding to the plurality of column lenses arranged along the first direction are all the same.

[0132] For example, the first exit point corresponding to the design point of the kth column lens is calculated according to the above formula (3) to formula (6), and the distance y k (k) between the center column lens 201 corresponding to the human eye and the first direction is calculated, k is a variable, and P is the known width of the column lens. The second exit point corresponding to the design point of the kth column lens is calculated according to formula (7) and formula (8), and the distance y no (k) between the human eye in the first direction X is calculated.

[0133] According to formula (2), the value of the best theoretical arrangement period Δx corresponding to the coordinates of the human eye in the third direction E z can be calculated, that is, the controller needs to control the display arrangement period Δx, and the arrangement period of all the column lenses on the display substrate is displayed as the above calculated Δx, so that the best display effect can be obtained.

[0134] As shown in FIG. 7, for the demand viewing optimal distance range [450mm, 700mm], the above calculation steps are used to calculate the optimal arrangement period value at different distances, wherein, (a) in FIG. 7 is the crosstalk of the display device before optimization, and (b) in FIG. 7 is the crosstalk of the display device after optimization. The vertical coordinate is the distance of the human eye in the third direction [450mm, 1100mm], and the horizontal coordinate is the angle range [0°, 25°], as shown in (b) in FIG. 7, after the optimal arrangement period value is obtained by calculation, and the controller controls the plurality of pixel units to determine the same arrangement period to periodically display the left eye image and the right eye image, so that the crosstalk in the range of 7 to 15° disappears, thereby improving the display effect of the display device. FIG. 2C FIG. 2C FIG. 2C FIG. 2C

[0135] In an embodiment of the present disclosure, in the cylindrical lens array of the display device, when the arrangement periods corresponding to the at least two cylindrical lenses are the same, that is, the arrangement periods corresponding to the cylindrical lenses can be partially the same or all the same, the arrangement periods corresponding to all the cylindrical lenses are less than the arrangement period determined by the foregoing formula (1).

[0136] FIG. 3A A cross-sectional structure schematic diagram of a stereoscopic display substrate of another embodiment of the present disclosure is schematically shown. FIG. 3B A schematic diagram of the arrangement period of a stereoscopic display substrate of an embodiment of the present disclosure changing with the position of the human eye is schematically shown. FIG. 3C A variation curve schematic diagram of a plurality of arrangement periods of a stereoscopic display substrate of another embodiment of the present disclosure is schematically shown.

[0137] In another possible embodiment, as shown in FIG. 8, the plurality of cylindrical lenses includes a center cylindrical lens 201, a first intermediate cylindrical lens 204, a second intermediate cylindrical lens 205, a left side cylindrical lens 202, and a right side cylindrical lens 203. The center cylindrical lens 201 is a cylindrical lens directly facing the human eye. The left side cylindrical lens 202 and the right side cylindrical lens 203 are two cylindrical lenses closest to the edge of the display substrate in the first direction. The first intermediate cylindrical lens 204 and the second intermediate cylindrical lens 205 are respectively located on both sides of the center cylindrical lens. The first intermediate cylindrical lens 204 is located between the center cylindrical lens 201 and the left side cylindrical lens 202, and the second intermediate cylindrical lens 205 is located between the center cylindrical lens 201 and the right side cylindrical lens 203. FIG. 3A

[0138] ​​​​​The arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses A1 is the first arrangement period Δx1, and the arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses B1 is the second arrangement period Δx2, the first arrangement period Δx1 is different from the second arrangement period Δx2, the first group of cylindrical lenses A1 includes each cylindrical lens arranged continuously in the first direction from the first intermediate cylindrical lens 204 to the second intermediate cylindrical lens 205, and the second group of cylindrical lenses B1 includes each cylindrical lens arranged continuously in the first direction from the first intermediate cylindrical lens 204 to the left cylindrical lens 201 and each cylindrical lens arranged continuously in the first direction from the second intermediate cylindrical lens 205 to the right cylindrical lens 203.

[0139] like FIG. 3A As shown, the first row period Δx1 corresponding to each cylindrical lens of the first cylindrical lens group A1 is greater than the second row period Δx2 corresponding to each cylindrical lens of the second cylindrical lens group B1.

[0140] For example, the first row of image periods corresponding to the cylindrical lenses of the first cylindrical lens group A1 is based on the distance coordinate E of the human eye in the third direction Y as described above. z The first arrangement period Δx1 is determined by the corresponding optimal arrangement period. That is, the first arrangement period Δx1 is calculated according to Ez and the above formulas (2) to (8). The second arrangement period Δx2 and the number of cylindrical lenses k between the first group of cylindrical lenses A1 and the second group of cylindrical lenses B1 are calculated by combining the first arrangement period Δx1 and the following formula (9). max Formula (9) is as follows:

[0141]

[0142] where k max represents the cylindrical lens when the first pattern arrangement period is changed to the second pattern arrangement period. In this embodiment, k max The cylindrical lenses are located relative to the human eye, that is, in the first direction X, and are spaced apart from the central cylindrical lens corresponding to the human eye.

[0143] like FIG. 3B As shown, assuming that the distance E of the human eye in the third direction z =700mm, the position of the area corresponding to the first lens group A1 relative to the human eye is [E x -k max , E x -k max ,], that is, the first row of images in the first lens group A1 has a constant period of Δx1. According to the above formula, k can be determined max=1990, then the first row of image periods corresponds to the human eye at coordinate positions L[0, 0, 700] and L'[-326.41, 0, 700]. According to the embodiments of the present disclosure, changes in the position of the human eye cause changes in the positions of the first row of image periods Δx1 and the second row of image periods Δx2 displayed on the display substrate, thereby providing a better viewing experience for the human eye at different positions and reducing crosstalk in the display device.

[0144] like FIG. 3C As shown, in FIG. 3C In the equation (2), the horizontal axis represents the number of cylindrical lenses, and the vertical axis represents the y k (k) and y no (k) The difference between them (not the absolute value).

[0145] like FIG. 3C As shown in (a), the first row of image period Δx1 is calculated based on Ez and the above formulas (2) to (8). When the number of central cylindrical lenses corresponding to the distance from the human eye exceeds 4000, the display effect is reduced. FIG. 3C As shown in (b), after the second row of images period Δx2 is calculated according to formula (9), the display effect will not be reduced when the number of central column lenses corresponding to the human eye exceeds 4000, and the display effect will not be reduced until the number of central column lenses corresponding to the human eye exceeds 5000. Therefore, by setting the first row of images period Δx1 and the second row of images period Δx2 respectively, the display effect of the display device can be effectively improved.

[0146] FIG. 4A A schematic cross-sectional structural diagram of a stereoscopic display substrate according to another embodiment of the present disclosure is shown. FIG. 4B A schematic diagram of a curve showing linear changes in the pattern arrangement period of a stereoscopic display substrate according to another embodiment of the present disclosure is shown.

[0147] In an exemplary embodiment of the present disclosure, at least two cylindrical lenses correspond to different pattern arrangement periods, where the pattern arrangement period refers to a pixel width displayed by a pixel unit on a display substrate and corresponding to a cylindrical lens.

[0148] like FIG. 4AAs shown, the multiple cylindrical lenses include a central cylindrical lens 201, a left cylindrical lens 202, and a right cylindrical lens 203. The central cylindrical lens 201 is a cylindrical lens for the human eye, and the left cylindrical lens 202 and the right cylindrical lens 203 are respectively the two cylindrical lenses closest to the edge of the display substrate in the first direction. The image arrangement periods corresponding to the cylindrical lenses in the first group of cylindrical lenses A2 are different from each other. The image arrangement periods corresponding to the cylindrical lenses in the second group of cylindrical lenses B2 are different from each other. The first group of cylindrical lenses A2 includes cylindrical lenses arranged continuously in the first direction from the central cylindrical lens 201 to the left cylindrical lens 202, and the second group of cylindrical lenses B2 includes cylindrical lenses arranged continuously in the first direction from the central cylindrical lens 201 to the right cylindrical lens 203. That is, the image arrangement periods of the first group of cylindrical lenses and the second group of cylindrical lenses displayed on the display substrate by the controller can be symmetrically distributed with the center of the central cylindrical lens 201 as the axis. In an optional embodiment, the controller controls the arrangement period of the first group of cylindrical lenses and the arrangement period of the second group of cylindrical lenses displayed on the display substrate to be asymmetric, that is, the variation pattern of the arrangement period of each group of cylindrical lenses is different.

[0149] In an exemplary embodiment, FIG. 4A As shown, the pattern arrangement period corresponding to each cylindrical lens in the first cylindrical lens group A2 varies linearly and continuously, and the pattern arrangement period corresponding to each cylindrical lens in the second cylindrical lens group B2 also varies linearly and continuously. For example, the pattern arrangement period corresponding to each cylindrical lens in the first cylindrical lens group and the pattern arrangement period corresponding to each cylindrical lens in the second cylindrical lens group follow the same linear and continuous variation pattern. In alternative embodiments, the pattern arrangement period corresponding to each cylindrical lens in the first cylindrical lens group and the pattern arrangement period corresponding to each cylindrical lens in the second cylindrical lens group may also follow different linear and continuous variations.

[0150] For example, the linear continuous variation of the first cylindrical lens group A2 and the second cylindrical lens group B2 is identical. Here, only the linear continuous variation of the second cylindrical lens group B2 will be specifically described. On the left and right sides of the central cylindrical lens 201, with the central cylindrical lens 201 as the center of symmetry, the pattern arrangement period corresponding to each cylindrical lens is oriented toward both sides. As the number of cylindrical lenses increases, the pattern arrangement period decreases. The decreasing pattern of the pattern arrangement period satisfies formula (10):

[0151]

[0152] Where α is the correction coefficient, Δx min is the pattern arrangement period corresponding to the maximum allowable pitch of the cylindrical lenses, and k is the number of distances between the first group of cylindrical lenses or the second group of cylindrical lenses and the central cylindrical lens.

[0153] For example, the number of the first group of column lenses A1 or the second group of column lenses B1 is given as m, that is, the total number of column lenses from the center column lens 201 to the left column lens 202 is m, or the number of column lenses from the center column lens 201 to the right column lens 203 is m, Δx is calculated according to the given number of column lenses m, the width P of the column lens, and the above formula (6) min , so as to determine the decreasing rule of the arrangement period according to the above formula (10).

[0154] FIG. 4B The figure showing the change of the arrangement period with the number (i.e., the position) of the column lens in consideration of the refractive effect of the column lens is schematically shown. Exemplarily, as shown in the figure 1, the curve 1 represents the curve showing the change of the theoretical arrangement period with the number (i.e., the position) of the column lens in consideration of the refractive effect of the column lens; the straight line 1, the straight line 2 and the straight line 3 respectively represent the straight lines showing the change of the arrangement period with the number (i.e., the position) of the column lens in consideration of the refractive effect of the column lens determined by the formula (10), wherein the straight line 1, the straight line 2 and the straight line 3 correspond to different values of the correction coefficient α in the formula (10). FIG. 4B

[0155] Exemplarily, as shown by the straight line 1, the straight line 2 and the straight line 3 in the figure 1, the arrangement period corresponding to each column lens in the first group of column lenses A2 is linearly decreased. The arrangement period corresponding to each column lens in the second group of column lenses B2 is also linearly decreased. FIG. 4B In the embodiment, α is the correction coefficient, that is, α is a constant, and 0 < α < 1, as shown in the figure 2, the change rule of the arrangement period corresponding to each column lens when α takes different values in (0, 1). According to the curve shown in the figure 2, it can be known that the arrangement period corresponding to each column lens in the first group of column lenses A2 is linearly negatively correlated with the first distance, wherein the first distance is the distance between each column lens in the first group of column lenses and the center column lens. The arrangement period corresponding to each column lens in the second group of column lenses B2 is linearly negatively correlated with the second distance, wherein the second distance is the distance between each column lens in the second group of column lenses and the center column lens.

[0156] FIG. 4B According to the embodiment of the present disclosure, by setting the arrangement period corresponding to each column lens in the first group of column lenses A2 or the second group of column lenses B2 to be linearly continuously changed, the problem of crosstalk of the display device can be effectively reduced, and the display effect can be improved. FIG. 4B

[0157]

[0158] FIG. 5A ​​​​The crosstalk rate-number (i.e., position) curve diagram of several exemplary cases is schematically shown, wherein the crosstalk rate change under a linearly continuously changing pattern arrangement period is schematically compared with the crosstalk rate change under a fixed pattern arrangement period. FIG. 5A As shown, curve 1 represents the curve of crosstalk rate-number of cylindrical lenses (i.e., position) under the pattern arrangement period determined by formula (1), curve 2, curve 3 and curve 4 respectively represent the curve of crosstalk rate-number of cylindrical lenses (i.e., position) under the pattern arrangement period determined by formula (10), wherein curve 2 corresponds to the case where the correction coefficient α is 1, curve 3 corresponds to the case where the correction coefficient α is 1 / 2, and curve 4 corresponds to the case where the correction coefficient α is 1 / 4.

[0159] FIG. 5B The crosstalk rate-number (i.e., position) curve diagram for several exemplary cases is schematically shown, wherein the crosstalk rate change comparison under one pattern arrangement period, two pattern arrangement periods, and a linearly continuously changing pattern arrangement period is schematically shown, which is determined by considering the refraction effect of the cylindrical lens. FIG. 5B As shown, curve 1 represents the curve of crosstalk rate-number of cylindrical lenses (i.e., position) under one arrangement period determined according to formulas (2)-(8) with the influence of the refraction of the cylindrical lenses taken into account, curve 2 represents the curve of crosstalk rate-number of cylindrical lenses (i.e., position) under two arrangement periods determined according to formula (9) with the influence of the refraction of the cylindrical lenses taken into account, and curve 3 represents the curve of crosstalk rate-number of cylindrical lenses (i.e., position) under detailed continuously changing arrangement periods determined by formula (10), wherein the correction coefficient α is 1 / 4.

[0160] from FIG. 5A and FIG. 5B It can be seen that in the case of a linearly continuously changing arrangement period, the crosstalk rate is relatively small, and the crosstalk rate change curve is relatively smooth, which can solve the problem of obvious dividing lines in the optimal arrangement period.

[0161] FIG. 6 The following is a schematic diagram showing the curve of the arrangement period of the cylindrical lenses of the stereoscopic display substrate at different viewing distances of the exemplary embodiment of the present disclosure - the number of cylindrical lenses (ie, position). FIG. 6 In the figure, curves 1 to 8 correspond to the curves of the arrangement period of the cylindrical lenses-the number of cylindrical lenses (i.e., positions) at viewing distances of 450 mm, 500 mm, 600 mm, 700 mm, 800 mm, 900 mm, 1000 mm, and 1100 mm, respectively.

[0162] In another exemplary embodiment, the pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses A2 varies nonlinearly and continuously, and the pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses B2 varies nonlinearly and continuously.

[0163] Exemplarily, the human eye is taken as the origin, and a coordinate transformation is performed on formula (6) to obtain formula (11):

[0164]

[0165] wherein P is the pitch of the adjacent columnar lens, h is the equivalent air gap of the columnar lens and the display unit, n is the ratio of the refractive index n2 of the columnar lens to the refractive index n1 of the first medium layer, E z is the distance between the human eye and the center columnar lens in the first direction.

[0166] From the position of the human eye to both sides of the screen, the arrangement period corresponding to each columnar lens changes nonlinearly and continuously. The distance coordinate y k of each columnar lens in the first direction X relative to the human eye can be obtained by using formula (11), and the size of the nonlinear arrangement period corresponding to each columnar lens can be determined by using the following formula (12), which is as follows:

[0167] Δx=y k (k)-y k (k-1) Formula (12)

[0168] The arrangement period corresponding to each columnar lens determined according to formula 12 controls the pixel units of the display substrate to be arranged according to the above arrangement period, so that a completely crosstalk-free stereoscopic image can be obtained at a large viewing angle.

[0169] In some embodiments of the present disclosure, the arrangement period corresponding to each columnar lens in the first group of columnar lenses is nonlinearly reduced, and the arrangement period corresponding to each columnar lens in the second group of columnar lenses is nonlinearly reduced.

[0170] According to the embodiments of the present disclosure, by determining the arrangement period of the plurality of pixel units of the display substrate controlled by the controller, and the nonlinear continuous change of the arrangement period corresponding to each columnar lens, the problem of crosstalk of the display device can be completely solved, and the display effect is improved.

[0171] In some exemplary embodiments of the present disclosure, the display device further comprises an eye tracking module for tracking the position of the human eye; and the controller is further configured to determine the relative position relationship between the human eye, the columnar lens array and the display substrate according to the tracked position of the human eye.

[0172] In the embodiments of the present disclosure, for the demand viewing optimal distance range [450mm, 700mm], different nonlinear change formulas are obtained by using the above steps respectively, and the size of the arrangement period Δx corresponding to different cylindrical lenses is solved according to the formulas. However, in the case of linear change or nonlinear change of the arrangement period, the human eye is the origin position of the arrangement period change. When the position of the human eye changes, for example, the human eye is offset in the first direction X and / or the third direction Y, the arrangement period on the entire display substrate will change, and the display effect received by the human eye needs to be re-arranged to be better, which will cause a large amount of calculation resources and is difficult to realize.

[0173] To this end, the controller of some embodiments of the present disclosure is further configured to: respectively determine the arrangement period and the arrangement period change rate at a plurality of preset viewing distances; establish a mapping relationship between the arrangement period change rate at each preset viewing distance and each cylindrical lens; obtain the position of the human eye in real time to determine the real-time viewing distance; determine the mapping relationship between the arrangement period change rate at the preset viewing distance closest to the determined real-time viewing distance and each cylindrical lens as the mapping relationship between the arrangement period change rate at the real-time viewing distance and each cylindrical lens; and calculate the arrangement period corresponding to each cylindrical lens at the real-time viewing distance according to the determined mapping relationship between the arrangement period change rate at the real-time viewing distance and each cylindrical lens.

[0174] For example, for the convenience of subsequent FPGA implementation, first, the difference in the arrangement period Δx change at different positions needs to be obtained, such as selecting 450mm, 500mm, 600mm, 700mm, 800mm, 900mm, 1000mm, and 1100mm within the viewing distance range [450mm, 1100mm], respectively using the nonlinear formula to solve the Δx size corresponding to all cylindrical lenses, and obtaining the change rate of Δx, such as FIG. 6 as shown.

[0175] It can be seen from the figure that the change rate of the arrangement period Δx in the range of [450, 600] is relatively large, and the change rate of the arrangement period Δx in the range of [700, 1100] is relatively small. Different layer sections are selected according to the conclusion, that is, the arrangement period Δx change rate table of 450mm, 500mm, 650mm, 700mm, 800mm and 1000mm layer sections can be made, and the closest change rate table (for example, 700mm change rate table is selected for 720mm) can be selected for any range, so that the arrangement period Δx size of different column lenses at the distance is obtained according to the change rate. According to the embodiment of the present disclosure, by establishing the mapping relationship between the arrangement period change rate at each preset viewing distance and each column lens, and according to the mapping relationship between the arrangement period change rate at the real-time viewing distance and each column lens determined, the corresponding arrangement period of each column lens at the real-time viewing distance is calculated, which can greatly reduce the amount of calculation data and improve the data processing speed. In addition, this method can also effectively avoid the re-arrangement caused by slight shaking in the process of eye tracking, and is easy to implement in FPGA.

[0176] FIG. 7 A flowchart of a control method of a stereoscopic display substrate is schematically shown.

[0177] As shown in FIG. 7 The control method includes operations S1 to S2.

[0178] In operation S1, the arrangement period is determined according to the relative position relationship between the human eye, the column lens array and the display substrate, and according to the refraction of the light emitted by the column lens array to the plurality of pixel units.

[0179] In operation S2, the plurality of pixel units are controlled to periodically display the left eye image and the right eye image respectively with the determined arrangement period.

[0180] In some embodiments of the present disclosure, the control method further includes tracking the position of the human eye, and determining the relative position relationship between the human eye, the column lens array and the display substrate according to the tracked position of the human eye.

[0181] The display device in the above embodiments of the present disclosure can achieve the same beneficial effects as the display substrate, which will not be repeated here.

[0182] The display device described above can be any device that displays images whether in motion (e.g., video) or stationary (e.g., still images), and whether textual or pictorial. More particularly, it is contemplated that the embodiments can be implemented in or in association with a variety of electronic devices, such as, but not limited to, mobile telephones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 players, camcorders, game consoles, wrist watches, clocks, calculators, television monitors, flat panel displays, computer monitors, auto displays (e.g., odometer display, etc.), cockpit controls and / or displays, display of camera views (e.g., display of a rear view camera in a vehicle), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., display of images on a piece of jewelry) and the like.

[0183] While some embodiments of the disclosure have been illustrated and described, it will be clear to those of ordinary skill in the art that changes can be made without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A stereoscopic display device, wherein: The stereoscopic display device comprises: A display substrate, the display substrate comprising a base substrate and a plurality of pixel units disposed on the base substrate, the plurality of pixel units being arranged in an array in a first direction and a second direction, wherein the first direction and the second direction intersect; a cylindrical lens array, the cylindrical lens array being located on the light-emitting side of the display substrate; and a controller configured to: determine an image arrangement period based on a relative positional relationship among a human eye, a cylindrical lens array, and a display substrate, and based on a refraction of light emitted by the plurality of pixel units by the cylindrical lens array; and control the plurality of pixel units to periodically display a left-eye image and a right-eye image according to the determined image arrangement period; Wherein, the cylindrical lens array comprises a plurality of cylindrical lenses arranged along a first direction; The same design point on the same cylindrical lens corresponds to a first light exit point and a second light exit point on the light exit surface of the display substrate, respectively, wherein light emitted from the first light exit point is incident on the design point and can enter the human eye after being refracted by the cylindrical lens, and the second light exit point, the design point, and the human eye are located on the same straight line; and The controller is configured to: determine the pattern arrangement period so that the distance between the first light exit point and the second light exit point in the first direction is less than or equal to a specified value, so as to avoid crosstalk between images displayed by two adjacent pattern arrangement units, wherein the pattern arrangement unit includes at least one pixel unit displaying a left-eye image or a right-eye image, and a plurality of the pattern arrangement units are periodically arranged in the first direction with the pattern arrangement period as a period.

2. The stereoscopic display device according to claim 1, wherein: The controller is configured to determine a plurality of pattern arrangement periods, the cylindrical lens array includes a plurality of cylindrical lenses arranged along a first direction, and the plurality of pattern arrangement periods correspond one-to-one to the plurality of cylindrical lenses; and The pattern arrangement periods corresponding to at least two cylindrical lenses are different.

3. The stereoscopic display device according to claim 2, wherein: The plurality of cylindrical lenses include a central cylindrical lens, a left cylindrical lens, and a right cylindrical lens, wherein the central cylindrical lens is a cylindrical lens for human eyes, and the left cylindrical lens and the right cylindrical lens are two cylindrical lenses closest to an edge of the display substrate in a first direction respectively; as well as The arrangement periods corresponding to the cylindrical lenses in the first group of cylindrical lenses are different from each other, and / or the arrangement periods corresponding to the cylindrical lenses in the second group of cylindrical lenses are different from each other, wherein the first group of cylindrical lenses includes the cylindrical lenses arranged continuously in the first direction from the central cylindrical lens to the left cylindrical lens, and the second group of cylindrical lenses includes the cylindrical lenses arranged continuously in the first direction from the central cylindrical lens to the right cylindrical lens.

4. The stereoscopic display device according to claim 3, wherein: The pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses changes linearly and continuously, and / or the pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses changes linearly and continuously.

5. The stereoscopic display device according to claim 4, wherein: The pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses decreases linearly, and / or the pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses decreases linearly.

6. The stereoscopic display device according to claim 3, wherein: The pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses varies nonlinearly and continuously, and / or the pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses varies nonlinearly and continuously.

7. The stereoscopic display device according to claim 6, wherein: The pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses decreases nonlinearly, and / or the pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses decreases nonlinearly.

8. The stereoscopic display device according to claim 1, wherein: The controller is configured to determine a plurality of pattern arrangement periods, the cylindrical lens array includes a plurality of cylindrical lenses arranged along a first direction, and the plurality of pattern arrangement periods correspond one-to-one to the plurality of cylindrical lenses; and The pattern arrangement periods corresponding to at least two cylindrical lenses are the same.

9. The stereoscopic display device according to claim 8, wherein: The pattern arrangement periods corresponding to the cylindrical lenses are all the same.

10. The stereoscopic display device according to claim 8, wherein: The pattern arrangement period corresponding to each cylindrical lens is smaller than the pattern arrangement period determined by formula (1): in, is the viewing distance between the human eye and the stereoscopic display device, P is the pitch of adjacent cylindrical lenses, and h is the equivalent air distance between the cylindrical lenses and the display unit.

11. The stereoscopic display device according to claim 8, wherein: The plurality of cylindrical lenses include a central cylindrical lens, a first intermediate cylindrical lens, a second intermediate cylindrical lens, a left cylindrical lens, and a right cylindrical lens, wherein the central cylindrical lens is a cylindrical lens for human eyes, the left cylindrical lens and the right cylindrical lens are two cylindrical lenses closest to an edge of the display substrate in a first direction, the first intermediate cylindrical lens and the second intermediate cylindrical lens are respectively located on both sides of the central cylindrical lens, the first intermediate cylindrical lens is located between the central cylindrical lens and the left cylindrical lens, and the second intermediate cylindrical lens is located between the central cylindrical lens and the right cylindrical lens; as well as The pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses is the first pattern arrangement period, and the pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses is the second pattern arrangement period, wherein the first pattern arrangement period is different from the second pattern arrangement period, the first group of cylindrical lenses includes each cylindrical lens continuously arranged in the first direction from the first intermediate cylindrical lens to the second intermediate cylindrical lens, and the second group of cylindrical lenses includes each cylindrical lens continuously arranged in the first direction from the first intermediate cylindrical lens to the left cylindrical lens and each cylindrical lens continuously arranged in the first direction from the second intermediate cylindrical lens to the right cylindrical lens.

12. The stereoscopic display device according to claim 11, wherein: The first image arrangement period is greater than the second image arrangement period.

13. The stereoscopic display device according to claim 12, wherein: The display device further includes: a human eye tracking module for tracking the position of a human eye; The controller is further configured to determine the relative positional relationship between the human eye, the cylindrical lens array, and the display substrate according to the tracked position of the human eye.

14. The stereoscopic display device according to claim 13, wherein: The controller is further configured to: Determining the image arrangement period and the image arrangement period change rate at multiple preset viewing distances respectively; Establishing a mapping relationship between the image arrangement period change rate and each cylindrical lens at each preset viewing distance; Obtain the position of the human eye in real time to determine the real-time viewing distance; Determine the mapping relationship between the image arrangement periodic change rate and each cylindrical lens at a preset viewing distance closest to the determined real-time viewing distance as the mapping relationship between the image arrangement periodic change rate and each cylindrical lens at the real-time viewing distance; as well as According to the determined image arrangement period change rate at the real-time viewing distance and the mapping relationship between the cylindrical lenses, the image arrangement period corresponding to each cylindrical lens at the real-time viewing distance is calculated.

15. The stereoscopic display device according to claim 4 or 5, wherein: The pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses is linearly negatively correlated with a first distance, wherein the first distance is the distance between each cylindrical lens in the first group of cylindrical lenses and the central cylindrical lens; and / or, The pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses is linearly negatively correlated with the second distance, wherein the second distance is the distance between each cylindrical lens in the second group of cylindrical lenses and the central cylindrical lens.

16. The stereoscopic display device according to claim 15, wherein: The linear correlation determined by the controller satisfies the following formula: Where α is the correction coefficient, , is the viewing distance between the human eye and the stereoscopic display device, P is the pitch of adjacent cylindrical lenses, h is the equivalent air distance between the cylindrical lenses and the display unit, is the pattern arrangement period corresponding to the maximum allowable pitch of the cylindrical lens, k is the number of the first group of cylindrical lenses or the second group of cylindrical lenses from the central cylindrical lens, k max k is the maximum distance between the first group of cylindrical lenses or the second group of cylindrical lenses and the central cylindrical lens, min is the minimum distance between the first group of cylindrical lenses or the second group of cylindrical lenses and the central cylindrical lens.

17. The stereoscopic display device according to claim 6 or 7, wherein: The pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses is the pitch of two pattern arrangement units corresponding to two adjacent cylindrical lenses; and / or, The pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses is the pitch between two pattern arrangement units corresponding to two adjacent cylindrical lenses.

18. The stereoscopic display device according to claim 17, wherein: The pattern arrangement period corresponding to each cylindrical lens in the first group of cylindrical lenses and / or the pattern arrangement period corresponding to each cylindrical lens in the second group of cylindrical lenses Satisfies the following formula: Among them, y k (k) is the distance in the first direction between the first light exit point corresponding to the design point of the k-th cylindrical lens and the central cylindrical lens corresponding to the position of the human eye, k is a positive integer, P is the pitch of adjacent cylindrical lenses, h is the equivalent air distance between the cylindrical lens and the display unit, and n is the ratio of the refractive index n2 of the cylindrical lens to the refractive index n1 of the first dielectric layer. is the viewing distance between the human eye and the stereoscopic display device.

19. The stereoscopic display device according to claim 12, wherein: The distance y between the first light-emitting point corresponding to the design point of the cylindrical lens and the central cylindrical lens k Satisfies the following formula: Wherein, k is a positive integer, P is the pitch of adjacent cylindrical lenses, h is the equivalent air distance between the cylindrical lens and the display unit, and n is the ratio of the refractive index n2 of the cylindrical lens to the refractive index n1 of the first dielectric layer. It represents the angle between the light ray and the normal in the cylindrical lens.

20. The stereoscopic display device according to claim 19, wherein: The distance y between the second light-emitting point corresponding to the design point of the cylindrical lens and the central cylindrical lens no Satisfies the following formula: in, is the pattern arrangement period corresponding to the cylindrical lens, is the distance between the human eye and the central cylindrical lens in the first direction.

21. The stereoscopic display device according to claim 20, wherein: The distance between the first light-emitting point corresponding to the design point of the cylindrical lens and the central cylindrical lens is equal to the first row period of the first group of cylindrical lenses. And the second row of the second group of cylindrical lenses Satisfies the following formula: Wherein, M is the specified value, is the number of cylindrical lenses from the central cylindrical lens to the first intermediate cylindrical lens or the second intermediate cylindrical lens, is the pattern arrangement period corresponding to the first group of cylindrical lenses, is the pattern arrangement period corresponding to the second group of cylindrical lenses.

22. A control method for a stereoscopic display device, the stereoscopic display device comprising: A display substrate, the display substrate comprising a base substrate and a plurality of pixel units arranged on the base substrate, the plurality of pixel units being arranged in an array in a first direction and a second direction, wherein the first direction and the second direction intersect; a cylindrical lens array, the cylindrical lens array being located on a light-emitting side of the display substrate, the cylindrical lens array comprising a plurality of cylindrical lenses arranged along the first direction, the same design point on the same cylindrical lens corresponding to a first light-emitting point and a second light-emitting point on a light-emitting surface of the display substrate, respectively, wherein light emitted from the first light-emitting point is incident on the design point and can enter a human eye after being refracted by the cylindrical lens, and the second light-emitting point, the design point, and the human eye are located on the same straight line, wherein the control method comprises: Determining a pattern arrangement period according to a relative positional relationship among a human eye, a cylindrical lens array, and a display substrate, and according to a refraction condition of light emitted by the plurality of pixel units by the cylindrical lens array; and Controlling the plurality of pixel units to periodically display the left-eye image and the right-eye image respectively according to the determined image arrangement period; The determined pattern arrangement period makes the distance between the first light exit point and the second light exit point in the first direction less than or equal to a specified value, so as to avoid crosstalk between the images displayed by two adjacent pattern arrangement units, wherein the pattern arrangement unit includes at least one pixel unit displaying a left-eye image or a right-eye image, and a plurality of the pattern arrangement units are periodically arranged in the first direction with the pattern arrangement period as a period.

23. The control method according to claim 22, further comprising: Tracking the position of human eyes; as well as According to the tracked position of the human eye, the relative position relationship among the human eye, the cylindrical lens array and the display substrate is determined.

Images