Combining provisional views with reduced crosstalk

Abstract

In a reduced-crosstalk multi view display system, processing circuitry can combine provisional views of a multiview image according to predetermined crosstalk-reducing coefficients to form reduced-crosstalk views. The predetermined crosstalk-reducing coefficients can be a function of a location of a viewer. The processing circuitry can cause a multiview display to display the reduced-crosstalk views. Each reduced-crosstalk view can be visible from a respective range of viewing angles. For example, in a reduced-crosstalk autostereoscopic display system, processing circuitry can combine a provisional left view and a provisional right view to form a reduced-crosstalk left view and a reduced-crosstalk right view. The processing circuitry can cause an autostereoscopic display to display the reduced-crosstalk left view to be visible from a left eye of the viewer and the reduced-crosstalk right view to be visible from a right eye of the viewer.

Description

COMBINING PROVISIONAL VIEWS WITH REDUCED CROSSTALK CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of U.S. Provisional Application No.63 / 669,460, filed July 10, 2024, which is hereby incorporated by reference in its entirety. FIELD OF THE DISCLOSURE

[0002] This document relates generally to display systems, and more specifically relates to multiview displays, three-dimensional displays, or autostereoscopic displays. BACKGROUND OF THE DISCLOSURE

[0003] A multiview display can provide different views of a multiview image to a viewer. A stereoscopic display can provide two different views of a three-dimensional image to the two eyes of a viewer. An autostereoscopic display can provide the two different views to the two eyes of the viewer without requiring the viewer to wear special glasses or eyewear. There is ongoing effort to improve autostereoscopic displays. SUMMARY

[0004] In an example, a reduced-crosstalk multiview display system can comprise processing circuitry. The processing circuitry can receive a location of a viewer. The processing circuitry can receive provisional views of a multiview image. The processing circuitry can combine the provisional views according to predetermined crosstalk-reducing coefficients to form reduced-crosstalk views of the multiview image. The crosstalk-reducing coefficients can be a function of the location of the viewer. The processing circuitry can cause a multiview display to display the reduced-crosstalk views of the multiview image. Each reduced-crosstalk view can be visible from a respective range of viewing angles.

[0005] In an example, a method for operating a reduced-crosstalk multiview display system includes using processing circuitry to receive a location of a viewer. The processing circuitry can receive provisional views of a multiview image. The processing circuitry can combine the provisional views according to predetermined crosstalk-reducing coefficients to form reduced- crosstalk views of the multiview image. The crosstalk-reducing coefficients can be a function of the location of the viewer. The processing circuitry can cause a multiview display to display the reduced-crosstalk views of the multiview image. Each reduced-crosstalk view can be visible from a respective range of viewing angles.

[0006] In an example, a reduced-crosstalk autostereoscopic display system can comprise an autostereoscopic display configured to display a multiview image. The autostereoscopic display can comprise an eye tracker configured to dynamically determine a location of a viewer. The autostereoscopic display can comprise processing circuitry. The processing circuitry can receive a provisional left view and a provisional right view of the multiview image. The processing circuitry can combine the provisional left view and the provisional right view according to predetermined crosstalk- reducing coefficients to form a reduced-crosstalk left view and a reduced- crosstalk right view of the multiview image. The predetermined crosstalk- reducing coefficients can be a function of the location of the viewer as determined using the eye tracker. The processing circuitry can cause the autostereoscopic display to display the reduced-crosstalk left view and the reduced-crosstalk right view such that the reduced-crosstalk left view is visible from a left eye of the viewer and the reduced-crosstalk right view is visible from a right eye of the viewer. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG.1 shows an exploded, perspective-view schematic drawing of an example of a multiview display system.

[0008] FIG.2 shows a front-view drawing of an example of a display panel that includes an array of light-emitting diodes.

[0009] FIG.3 shows a front-view drawing of an example of a display panel that includes a backlight and a light valve array.

[0010] FIG.4 shows a front-view drawing of an example of a parallax- generating optic that includes a lenticular lens.

[0011] FIG.5 shows a cross-sectional view of the lenticular lens of FIG. 4.

[0012] FIG.6 shows a front-view drawing of an example of a parallax- generating optic that includes a parallax barrier.

[0013] FIG.7 shows a cross-sectional view of the parallax barrier of FIG.6 having transmissive slits.

[0014] FIG.8 shows a flowchart of an example of a method for operating a reduced-crosstalk multiview display system. DETAILED DESCRIPTION

[0015] In a reduced-crosstalk multiview display system, processing circuitry can combine provisional views of a multiview image according to predetermined crosstalk-reducing coefficients to form reduced-crosstalk views. The predetermined crosstalk-reducing coefficients can be a function of a location of a viewer. The processing circuitry can cause a multiview display to display the reduced-crosstalk views. Each reduced-crosstalk view can be visible from a respective range of viewing angles. For example, in a reduced-crosstalk autostereoscopic display system, processing circuitry can combine portions of a provisional left view and portions of a provisional right view to form a reduced- crosstalk left view and a reduced-crosstalk right view. The processing circuitry can cause an autostereoscopic display to display the reduced-crosstalk left view to be visible from a left eye of the viewer and the reduced-crosstalk right view to be visible from a right eye of the viewer.

[0016] FIG.1 shows an exploded, perspective-view schematic drawing of an example of a multiview display system 100 that includes a multiview display 110. The configuration of FIG.1 is but one example of a multiview display system 100; other configurations can be used.

[0017] The sign conventions shown in FIG.1 and used below assume that the multiview display 110 extends in an (x, y) plane, and that a z-axisextends away from the multiview display 110 and generally toward a viewer 42, along a direction that is orthogonal to a plane of the multiview display 110. Other sign conventions can be used.

[0018] The multiview display system 100 can include a multiview display 110. The multiview display 110 can provide different views of a multiview image to the viewer 42. For example, as the viewer 42 moves in space, the multiview display 110 can direct different views of the multiview image to the left and right eyes of the viewer 42, so that the viewer 42 can observe the different views of the multiview image from different locations or orientations. In some configurations, the multiview display 110 can provide the multiple views at respective fixed location regions in space, so that the multiview display 110 can operate without using eye tracking. In other configurations, such as the autostereoscopic configurations described in detail below, the multiview display system 100 can use eye tracking to dynamically and continuously (or at relatively frequent discrete times) determine a location of the viewer 42, and in response, can dynamically and continuously control how the multiview display 110 displays the multiview image so that the multiple views follow the viewer 42 or follow the tracked eye location(s) of the viewer 42 as the viewer 42 moves in space relative to a position of the multiview display 110.

[0019] For configurations in which the multiview display 110 provides just two different views of the multiview image, the multiview display 110 can be an autostereoscopic display or three-dimensional (3D) display. The autostereoscopic display can provide a left image to a left eye of the viewer 42 and a right image to a right eye of the viewer 42. The left image and the right image can correspond to different views of an object or a scene, and can allow the viewer 42 to perceive the object or scene in 3D with just the viewer’s naked eyes, without the use of additional glasses or headgear.

[0020] The multiview display system 100 can include an eye tracker 120 that can dynamically determine the location of the viewer 42. The multiview display system 100 can use the determined location of the viewer 42 to direct the left image to the left eye of the viewer 42 and the right image to the right eye of the viewer 42. Because the viewer’s location can vary as the viewer 42 moves inspace, using eye tracking can allow the multiview display system 100 to follow the viewer 42, so that the autostereoscopic display can automatically direct the left image to the left eye at the viewer 42’s (dynamically varying) location and automatically direct the right image to the right eye at the viewer 42’s (dynamically varying) location. The eye tracker 120 can provide a tracked position of the viewer 42, such as a tracked position of a head of the viewer 42, of one or both eyes of the viewer 42, or of another anatomical feature of the viewer 42. The eye tracker 120 can be coupled to the processing circuitry 130 (described below) or controller, such as by providing viewer 42 location data (shown in FIG. 1 as coordinates xv, yv, and zv) that represents a measured position or location of the viewer 42. The eye tracker 120 can provide the viewer 42 location data at regular or irregular intervals to the processing circuitry 130. In a specific example of an eye tracker 120, a camera can capture an image of the viewer 42. The eye tracker 120 can further include an image processor (or general-purpose computer programmed as an image processor) that can determine a position of the viewer 42 within the captured image to provide the tracked position. In some examples, the processing circuitry 130 can include the image processor of the eye tracker 120. In other examples, the processing circuitry 130 can be separate from the image processor of the viewer 42 tracker. Other suitable eye trackers can be used, including eye trackers based on lidar (e.g., using time-of-flight of reflected light over a scene to determine distances to one or more objects in the scene, such as a viewer’s head or a viewer’s eyes) or other technologies. The processing circuitry 130 can use an output of the eye tracker 120, among other data, to perform one or more downstream calculations involved with providing the left view or left image to the left eye of the viewer 42 and the right view or right image to the right eye of the viewer 42.

[0021] The autostereoscopic display can be a lenticular autostereoscopic display. In a lenticular autostereoscopic display, a display panel 112 can display the multiview image, and a parallax-generating optic 118 can direct light from the display panel 112 to the viewer 42 such that a left image can be visible from the left eye of the viewer 42 and a right image can be visible from the right eye of the viewer 42. During use of the lenticular autostereoscopic display, the processing circuitry 130 can track the location of the viewer 42, and can use thetracked location to dynamically determine how to distribute content of the multiview image over a surface area of the display panel 112 (e.g., using pixels distributed over the display panel 112) such that a left image remains visible from the left eye of the viewer 42 and a right image remains visible from the right eye of the viewer 42, even as the viewer 42 changes location. In this manner, the location tracking and the image content distribution can be performed in software, such that following the location of the viewer 42 may not involve physically moving any components of the lenticular autostereoscopic display with respect to one another. Examples of suitable display panels and examples of suitable parallax-generating optics are described below.

[0022] In an example, a display panel 112 can display the multiview image. The display panel 112 can have an array of subpixels 114 that can display an image according to stereo mapping coordinates associated with the viewer 42. The subpixels 114 can be located at subpixel locations in a grid having grid axes (for example, the x-axis and y-axis). Each subpixel 114 can generate light having a specified color. For example, the subpixels 114 can include red subpixels, green subpixels, and blue subpixels, which generate red light, green light, and blue light, respectively. Other color / wavelength schemes can be used. The subpixels 114 can be grouped into pixels, with each pixel including at least two subpixels 114 that produce light of different colors. The display panel 112 can receive, from the processing circuitry 130 (described below), a display panel driving electrical signal 136 that can specify how the content of the multiview image is distributed over the pixels and / or subpixels 114 of the display panel 112. Two possible configurations for the display panel 112 are described below and shown in FIGS. 2 and 3. Other configurations can be used.

[0023] FIG.2 shows a front-view drawing of an example of a display panel 112A that includes an array 202 of light-emitting diodes 204, such as an array 202 of organic light-emitting diodes. Each light-emitting diode 204 can correspond to a subpixel. The array 202 of light-emitting diodes 204 can include red light-emitting diodes 204R, green light-emitting diodes 204G, and blue light-emitting diodes 204B, which correspond to the red subpixels, green subpixels, and blue subpixels, respectively. Each light-emitting diode 204 cancontrollably generate light in response to an electrical signal provided by the processing circuitry 130, such as display panel-driving electrical signal 136, or by suitable light-emitting diode-driving circuitry in communication with the processing circuitry 130. The processing circuitry 130 can cause a specified light-emitting diode 204 to be directly powered with a power that varies as a function of an intensity in a corresponding location in the image. The power delivered to a light-emitting diode 204 can optionally be pulse-width modulated at a modulation frequency that is greater than can be perceived by a human eye. Using pulse-width modulation can simplify a design of a light-emitting diode array controller, because it can generate an arbitrary average power level from a relatively small number of instantaneous power levels by varying a duty cycle of the power. In some examples, the array 202 of light-emitting diodes 204 can be arranged in a rectangular or square repeating pattern over a surface area 206 of the array 202. For example, the array 202 can have grid axes 208 that are orthogonal to each other. In some examples, the grid axes 208 can be parallel to edges 210 of the array 202 of light-emitting diodes 204.

[0024] FIG.3 shows a front-view drawing of an example of a display panel 112B that includes a backlight 302 and a light valve array 304. Although FIG.3 shows the backlight 302 and the light valve array 304 as being separated, in practice, the backlight 302 and the light valve array 304 may be in contact or may be located as close together as is practical. The backlight 302 can provide illumination having a uniform or substantially uniform intensity over a surface area of the backlight 302. The backlight 302 can provide illumination having a relatively broad spectrum, such as including most or all of the visible portion of the electromagnetic spectrum. The backlight 302 can provide the illumination into a continuum of propagation angles toward the light valve array 304. The backlight 302 can provide unmodulated illumination to the light valve array 304. The light valve array 304 can include light valves 306 that are individually controllable or controllable in one or more groups by the processing circuitry 130 (described below). Each light valve 306 can controllably attenuate the illumination from the backlight 302, such as in response to an electrical signal provided by the processing circuitry 130, such as display panel-driving electrical signal 136, or by suitable light valve driving circuitry in communication with theprocessing circuitry 130. Each light valve 306 can have a corresponding color filter that allows only a portion of the electromagnetic spectrum to pass through the light valve. For example, the light valves 306 can include red light valves 306R that have a red filter that allows only red light to pass through the red light valves 306R, green light valves 306G that have a green filter that allows only green light to pass through the green light valves 306G, and blue light valves 306B that have a blue filter that allows only blue light to pass through the blue light valves 306B. Other color schemes and numbers of colors can be used. Suitable light valves can include liquid crystal light valves, electrophoretic light valves, light valves based on electrowetting, and others. In some examples, the light valves 306 of the light valve array 304 can be arranged in a rectangular or square repeating pattern over a surface area 308 of the light valve array 304. For example, the light valve array 304 can have grid axes 208 that are orthogonal to each other. In some examples, the grid axes 208 can be parallel to edges 312 of the light valve array 304.

[0025] Referring again to FIG.1, the autostereoscopic display can include a parallax-generating optic 118 that can direct light from the display panel 112 to the viewer 42, such that a left view or a left image can be visible from a left eye of the viewer 42 and a right view or a right image can be visible from a right eye of the viewer 42. Two possible configurations for the parallax- generating optic 118 are described below and shown in FIGS. 4 and 5 and in FIGS. 6 and 7. Other configurations can be used. Each of the configurations of FIGS. 4 and 5 and in FIGS.6 and 7 can be used in combination with any of the configurations of the display panel 112 shown in FIGS.2 and 3 (e.g., the array of light-emitting diodes 204 in FIG.2 or the backlight 302 and light valve array 304 in FIG.3).

[0026] FIG.4 shows a front-view drawing of an example of a parallax- generating optic 118A that includes a lenticular lens 402. FIG.5 shows a cross- sectional view of the lenticular lens 402 of FIG.4. The lenticular lens 402 can include a plurality of cylindrical lenses 504 that are equally spaced apart. The lenticular lens 402 can have a focal plane coincident with the display panel 112. The lenticular lens 402 can be positioned to receive light from the display panel112 and at least partially focus the received light to direct the light to specified regions proximate the viewer’s eyes.

[0027] FIG.6 shows a front-view drawing of an example of a parallax- generating optic 118B that includes a parallax barrier 602. The parallax barrier can include a plurality of transmissive slits 704 that are equally spaced apart. FIG.7 shows a cross-sectional view of the parallax barrier 602 (FIG.6) having transmissive slits 704. The parallax barrier 602 can include an array of opaque strips 706 and thin transmissive slits 704 arranged to occlude portions of a displayed image in left and right viewing regions. The transmissive slits 704 can be spatially arranged to ensure that the left / right image portions are only visible in the corresponding left / right viewing regions for which they are intended. The parallax barrier 602 can be provided by a static physical layer in which the slits are precisely positioned, or electronically generated on an adaptive intermediate liquid crystal display layer.

[0028] The parallax-generating optic 118 can be invariant along an optical axis (OA) that is angled with respect to the grid axes (e.g., the x-axis and the y-axis), such as at an angle (α) of 45 degrees or about 45 degrees with respect to the grid axes 208. For example, the parallax-generating optic 118 can have transmissive features, such as the cylindrical lenses or the transmissive slits, that are invariant along the optical axis (OA) and are periodic along an axis that is orthogonal to the optical axis (OA).

[0029] Referring again to FIG.1, the autostereoscopic display can include a material 116 disposed between the display panel 112 and the parallax- generating optic 118. In some examples, the material 116 may extend fully between the display panel 112 and the parallax-generating optic 118, such that a light ray originating at the display panel 112 passes only through the material 116 (and does not pass through any air or unfilled volume) before arriving at the parallax-generating optic 118. In other examples, the material 116 may occupy only a portion of the volume between the display panel 112 and the parallax- generating optic 118, such that a light ray originating at the display panel 112 passes through at least some of the material 116 and passes through a volume of air before arriving at the parallax-generating optic 118. The material 116 may have a refractive index denoted by quantity n. The value of the refractive indexn may be between about 1.3 and about 2, although other suitable values may be used. Suitable materials 116 can include glass, plastic, a transparent optical adhesive, and others. In some examples, the material 116 can be dispensed in a liquid form, then cured in place, such as by exposure to ultraviolet light or heat. In other examples, the material 116 can be manufactured as a solid unit and placed in its location in the autostereoscopic display. For example, the material 116 can function as a cover glass for the display panel 112. In some examples, the material 116 can function as a relatively precise spacing element. For example, the material 116 can be manufactured to have a specified thickness to within a specified thickness tolerance, and can set the spacing between the display panel 112 and parallax-generating optic 118 to have a value equal to the specified thickness when the autostereoscopic display is assembled.

[0030] As illustrated in FIG.1, the multiview display system 100 can include processing circuitry 130. The processing circuitry 130 can include a processor 132 and memory 134 storing instructions executable by the processor 132. The instructions can be executable by the processor 132 to perform data processing activities. The data processing activities can include, among other activities: receiving a location of a viewer; receiving provisional views of a multiview image; combining the provisional views according to predetermined crosstalk-reducing coefficients to form reduced-crosstalk views of the multiview image, the crosstalk-reducing coefficients being a function of the location of the viewer; and causing, with the processing circuitry, a multiview display to display the reduced-crosstalk views of the multiview image, each reduced-crosstalk view being visible from a respective range of viewing angles. By executing these data processing activities, the processing circuitry 130 can cause the multiview display system 100 to be a reduced-crosstalk multiview display system. These data processing activities are described in detail below.

[0031] FIG.8 shows a flowchart of an example of a method 800 for operating a reduced-crosstalk multiview display system, such as the multiview display system 100 of FIG.1. The method 800 can apply to, or can be used by or used with, autostereoscopic display systems. The method 800 is but one method for operating a reduced-crosstalk multiview display system or an autostereoscopic display system; other suitable methods may be used.

[0032] At operation 802, processing circuitry, such as processing circuitry 130, can receive a location of a viewer, such as the viewer 42.

[0033] At operation 804, the processing circuitry can receive provisional views of a multiview image. The provisional views can correspond to the views received by the processing circuitry. If the provisional views were displayed as- is, the displayed views would exhibit crosstalk. For an autostereoscopic display system, the provisional views can include a provisional left view and a provisional right view.

[0034] At operation 806, the processing circuitry can combine the provisional views according to predetermined crosstalk-reducing coefficients to form reduced-crosstalk views of the multiview image. For example, the processing circuitry can combine the provisional views by, for a pixel at a specified position in the multiview image, combining pixels of the provisional views at the specified position according to the predetermined crosstalk-reducing coefficients. The processing circuitry can combine the provisional views linearly in linear space. The crosstalk-reducing coefficients can be a function of the location of the viewer. For an autostereoscopic display system, the reduced- crosstalk views can include a reduced-crosstalk left view and a reduced-crosstalk right view.

[0035] At operation 808, the processing circuitry can cause a multiview display, such as multiview display 110, to display the reduced-crosstalk views of the multiview image. Each reduced-crosstalk view can be visible from a respective range of viewing angles. The processing circuitry can dynamically determine the ranges of viewing angles in response to the location of the viewer. For an autostereoscopic display system, the processing circuitry can cause the autostereoscopic display to display the reduced-crosstalk left view and the reduced-crosstalk right view such that the reduced-crosstalk left view is visible from a left eye of the viewer and the reduced-crosstalk right view is visible from a right eye of the viewer.

[0036] The following mathematics describe the crosstalk-reducing coefficients more precisely.

[0037] For a multiview display that displays N views, a particular pixel of each view (e.g., a pixel having the same location in the multiview image forall of the multiview images) can have a luminance (e.g., an intensity, such as in linear space) denoted by quantity I. The N views have corresponding luminances denoted by I1, I2, …, IN.

[0038] In practice, there can be leakage of the luminance from one view leaking into a luminance of another view. Such leakage corresponds to crosstalk among the views. The leakage can be described mathematically by a leakage matrix, L. The luminance ^^for a given view i is given by:

[0039] ^^ = ∑^ ^^^^^ ,^^^represents a measure of how much luminance leaks from view j to view i.

[0041] To reduce or eliminate the crosstalk, we attempt to invert the leakage matrix L. We define convolutive crosstalk-reducing coefficients c for the N views as c1, c2, …, cN-1. We use the crosstalk-reducing coefficients c to define reduced-crosstalk views having luminance given by ^^^^^^∑^^^ ^^^^^^^^^,such as unity.

[0044] Using the reduced-crosstalk views, the observed luminance ^^^^^for a given view i is then given by:

[0045] ^^^^^ = ∑ ^ ^^^^^^^ ^ .

[0046] The crosstalk-reducing coefficients c1, c2, …, cN-1can be selected to minimize or reduce a difference between the observed luminance ^^^^^and the original (e.g., intended) luminance ^^. The minimization or reduction may be performed by a least squares technique, a hill-climbing technique, or other suitable optimization technique.

[0047] The crosstalk-reducing coefficients c1, c2, …, cN-1can vary with a position of the viewer. For example, the eye tracker can provide a dynamic position of a viewer’s head (or eye, or other suitable location on the viewer orindication of viewer location or position) as (x,y,z). Each crosstalk-reducing coefficient can be position-dependent, as c1(x,y,z), c2(x,y,z), …, cN-1(x,y,z).

[0048] During calibration of the multiview display system, before the multiview display system is shipped or put into use, a technician can measure the crosstalk-reducing coefficients c1, c2, …, cN-1 at multiple discrete viewing locations. During use of the multiview display system, the processing circuitry can receive a measured viewing location, and can interpolate between or among the closest measured viewing locations to determine the crosstalk-reducing coefficients c1, c2, …, cN-1 at the measured viewing location. The interpolation can be a fitting polynomial, or any suitable approximating function.

[0049] For an autostereoscopic display, which includes just two views of the multiview image, the mathematics and terminology can simplify. For an autostereoscopic display, in which the number of views N = 2, the crosstalk- reducing coefficients c1, c2, …, cN-1can include a first crosstalk-reducing coefficient c. The first crosstalk-reducing coefficient can be viewer location- dependent, as c(x,y,z).

[0050] The first crosstalk-reducing coefficient, c(x,y,z), can determine a same-view value, s(x,y,z), and an opposite-view value, o(x,y,z). The same-view value and the opposite-view value can vary with a location of the viewer. For example, one way to determine the same-view value, s(x,y,z), and the opposite- view value, o(x,y,z) is as follows: ^^ = ^view value can be unity.

[0054] The luminance of the reduced-crosstalk left view can be determined as a sum of the luminance of the reduced-crosstalk left view weighted by the same-view value and the luminance of the reduced-crosstalk right view weighted by the opposite-view value, such as follows:

[0055] ^^^^$ = ^^^, ^, ^^^$ +#^^, ^, ^^^'

[0056] The luminance of the reduced-crosstalk right view can be determined as a sum of the luminance of the reduced-crosstalk right view weighted by the same-view value and the luminance of the reduced-crosstalk left view weighted by the opposite-view value, such as follows:

[0057] ^^^^' = ^^^, ^, ^^^' +#^^, ^, ^^^$

[0058] Ideally, if there were no crosstalk between the left and right views, then the same-view value, s(x,y,z), would equal unity, and the opposite- view value, o(x,y,z), would equal zero.

[0059] An absolute value of the opposite-view value can be a minimumat an optimal viewing location, such as (^^)*, ^^)* , ^^)*+. The optimal viewinglocation can be a specified distance away from the multiview display at a viewing angle of ninety degrees with respect to the multiview display. The absolute value of the opposite-view value can increase at increasing distance away from the optimal viewing location.

[0060] The predetermined crosstalk-reducing coefficients can include specified values at a plurality of discrete locations. For example, the specified values of the predetermined crosstalk-reducing coefficients can be measured values obtained prior to use of the reduced-crosstalk multiview display system. The processing circuitry can perform interpolation of the specified values to determine the predetermined crosstalk-reducing coefficients at locations away from the discrete locations.

[0061] In some configurations, the predetermined crosstalk-reducing coefficients can be invariant with respect to pixel location in the multiviewimage. For example, for a pixel location of (^)^ ,- , ^)^ ,- +, the first crosstalk-reducing coefficient c can be a function of the viewer location ^^. , ^. , ^.^ butnot the pixel location. For these configurations, the first crosstalk-reducing coefficient c can be written as / (^. − ^)^ ,-, ^. − ^)^ ,- , ^.+.

[0062] In other configurations, the predetermined crosstalk-reducing coefficients can vary with respect to pixel location in the multiview image. For these configurations, the first crosstalk-reducing coefficient c can be written as / (^., ^. , ^. , ^)^ ,- , ^)^ ,- +.illustrate the system and method disclosed herein, ais provided below. Each of the following non limiting examples can stand on its own or can be combined in any permutation or combination with any one or more of the other examples.

[0064] In Example 1, a reduced-crosstalk multiview display system can comprise: processing circuitry configured to: receive a location of a viewer; receive provisional views of a multiview image; combine the provisional views according to predetermined crosstalk-reducing coefficients to form reduced- crosstalk views of the multiview image, the crosstalk-reducing coefficients being a function of the location of the viewer; and cause a multiview display to display the reduced-crosstalk views of the multiview image, each reduced-crosstalk view being visible from a respective range of viewing angles.

[0065] In Example 2, the reduced-crosstalk multiview display system of Example 1 can optionally be configured such that the processing circuitry is configured to dynamically determine the ranges of viewing angles in response to the location of the viewer.

[0066] In Example 3, the reduced-crosstalk multiview display system of any one of Examples 1-2 can optionally be configured such that the multiview display is an autostereoscopic display.

[0067] In Example 4, the reduced-crosstalk multiview display system of any one of Examples 1-3 can optionally be configured such that: the provisional views include a provisional left view and a provisional right view; and the reduced-crosstalk views include a reduced-crosstalk left view and a reduced- crosstalk right view.

[0068] In Example 5, the reduced-crosstalk multiview display system of any one of Examples 1-4 can optionally be configured such that: the autostereoscopic display is configured to display the reduced-crosstalk left viewsuch that the reduced-crosstalk left view is visible from a range of viewing angles that corresponds to a left eye of the viewer; and the autostereoscopic display is configured to display the reduced-crosstalk right view such that the reduced-crosstalk right view is visible from a range of viewing angles that corresponds to a right eye of the viewer.

[0069] In Example 6, the reduced-crosstalk multiview display system of any one of Examples 1-5 can optionally be configured such that: the crosstalk- reducing coefficients include a first crosstalk-reducing coefficient; the first crosstalk-reducing coefficient is configured to determine a same-view value and an opposite-view value; a sum of the same-view value and the opposite-view value is unity; the reduced-crosstalk left view is determined as a sum of the reduced-crosstalk left view weighted by the same-view value and the reduced- crosstalk right view weighted by the opposite-view value; and the reduced- crosstalk right view is determined as a sum of the reduced-crosstalk right view weighted by the same-view value and the reduced-crosstalk left view weighted by the opposite-view value.

[0070] In Example 7, the reduced-crosstalk multiview display system of any one of Examples 1-6 can optionally be configured such that: an absolute value of the opposite-view value is a minimum at an optimal viewing location; the optimal viewing location is a specified distance away from the multiview display at a viewing angle of ninety degrees with respect to the multiview display; and the absolute value of the opposite-view value increases at increasing distance away from the optimal viewing location.

[0071] In Example 8, the reduced-crosstalk multiview display system of any one of Examples 1-7 can optionally further comprise the autostereoscopic display, the autostereoscopic display being a lenticular autostereoscopic display and comprising: a display panel configured to display the multiview image; and a parallax-generating optic configured to direct light from the display panel to the viewer, such that the reduced-crosstalk left view is visible from a left eye of the viewer and the reduced-crosstalk right view is visible from a right eye of the viewer.

[0072] In Example 9, the reduced-crosstalk multiview display system of any one of Examples 1-8 can optionally be configured such that the parallax-generating optic comprises a lenticular lens, the lenticular lens including a plurality of cylindrical lenses that are equally spaced apart, the lenticular lens having a focal plane coincident with the display panel.

[0073] In Example 10, the reduced-crosstalk multiview display system of any one of Examples 1-9 can optionally be configured such that the parallax- generating optic comprises a parallax barrier, the parallax barrier including a plurality of transmissive slits that are equally spaced apart.

[0074] In Example 11, the reduced-crosstalk multiview display system of any one of Examples 1-10 can optionally be configured such that: the predetermined crosstalk-reducing coefficients include specified values at a plurality of discrete locations; the processing circuitry is further configured to perform interpolation of the specified values to determine the predetermined crosstalk-reducing coefficients at locations away from the discrete locations; and the specified values of the predetermined crosstalk-reducing coefficients are measured values obtained prior to use of the reduced-crosstalk multiview display system.

[0075] In Example 12, the reduced-crosstalk multiview display system of any one of Examples 1-11 can optionally be configured such that the processing circuitry is configured to combine the provisional views linearly in linear space.

[0076] In Example 13, the reduced-crosstalk multiview display system of any one of Examples 1-12 can optionally be configured such that the processing circuitry is further configured to combine the provisional views by, for a pixel at a specified position in the multiview image: combining pixels of the provisional views at the specified position according to the predetermined crosstalk-reducing coefficients, the predetermined crosstalk-reducing coefficients being invariant with respect to pixel location in the multiview image.

[0077] In Example 14, the reduced-crosstalk multiview display system of any one of Examples 1-13 can optionally be configured such that the processing circuitry is further configured to combine the provisional views by, for a pixel at a specified position in the multiview image: combining pixels of the provisional views at the specified position according to the predetermined crosstalk-reducing coefficients, the predetermined crosstalk-reducing coefficients varying with respect to pixel location in the multiview image.

[0078] In Example 15, the reduced-crosstalk multiview display system of any one of Examples 1-14 can optionally further comprise an eye tracker configured to dynamically determine the location of the viewer.

[0079] In Example 16, a method for operating a reduced-crosstalk multiview display system can comprise: receiving, with processing circuitry, a location of a viewer; receiving, with the processing circuitry, provisional views of a multiview image; combining, with the processing circuitry, the provisional views according to predetermined crosstalk-reducing coefficients to form reduced-crosstalk views of the multiview image, the crosstalk-reducing coefficients being a function of the location of the viewer; and causing, with the processing circuitry, a multiview display to display the reduced-crosstalk views of the multiview image, each reduced-crosstalk view being visible from a respective range of viewing angles.

[0080] In Example 17, the method of Example 16 can optionally be configured such that: the multiview display is an autostereoscopic display; the provisional views include a provisional left view and a provisional right view; and the reduced-crosstalk views include a reduced-crosstalk left view and a reduced-crosstalk right view.

[0081] In Example 18, the method of any one of Examples 16-17 can optionally further comprise: dynamically determining, with the processing circuitry, the ranges of viewing angles in response to the location of the viewer; displaying, on the autostereoscopic display, the reduced-crosstalk left view such that the reduced-crosstalk left view is visible from a range of viewing angles that corresponds to a left eye of the viewer; and displaying on the autostereoscopic display, the reduced-crosstalk right view such that the reduced-crosstalk right view is visible from a range of viewing angles that corresponds to a right eye of the viewer.

[0082] In Example 19, a reduced-crosstalk autostereoscopic display system can comprise: an autostereoscopic display configured to display a multiview image; an eye tracker configured to dynamically determine a location of a viewer; and processing circuitry configured to: receive a provisional left view and a provisional right view of the multiview image; combine the provisional left view and the provisional right view according to predeterminedcrosstalk-reducing coefficients to form a reduced-crosstalk left view and a reduced-crosstalk right view of the multiview image, the predetermined crosstalk-reducing coefficients being a function of the location of the viewer; and cause the autostereoscopic display to display the reduced-crosstalk left view and the reduced-crosstalk right view such that the reduced-crosstalk left view is visible from a left eye of the viewer and the reduced-crosstalk right view is visible from a right eye of the viewer.

[0083] In Example 20, the reduced-crosstalk autostereoscopic display system of Example 19 can optionally be configured such that: the predetermined crosstalk-reducing coefficients include specified values at a plurality of discrete locations; the processing circuitry is further configured to perform interpolation of the specified values to determine the predetermined crosstalk-reducing coefficients at locations away from the discrete locations; and the specified values of the predetermined crosstalk-reducing coefficients are measured values obtained prior to use of the reduced-crosstalk autostereoscopic display system.

[0084] The above detailed description includes references to the accompanying drawings, which form a part of the detailed description. The drawings show, by way of illustration, specific embodiments in which the invention can be practiced. These embodiments are also referred to herein as "examples." Such examples can include elements in addition to those shown or described. However, examples are contemplated in which only those elements shown or described are provided. Moreover, other examples can any combination or permutation of those elements shown or described (or one or more aspects thereof), either with respect to a particular example (or one or more aspects thereof), or with respect to other examples (or one or more aspects thereof) shown or described herein.

[0085] In this document, the terms "a" or "an" are used, as is common in patent documents, to include one or more than one, independent of any other instances or usages of "at least one" or "one or more." In this document, the term "or" is used to refer to a nonexclusive or, such that "A or B" can include "A but not B," "B but not A," and "A and B," unless otherwise indicated. In the appended claims, the terms "including" and "in which" are used as the plain- English equivalents of the respective terms "comprising" and "wherein". Also, inthe following claims, the terms "including" and "comprising" are open-ended, that is, a system, device, article, or process that includes elements in addition to those listed after such a term in a claim are still deemed to fall within the scope of that claim. Moreover, in the following claims, the terms "first," "second," and "third," etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

[0086] The above description is intended to be illustrative, and not restrictive. For example, the above-described examples (or one or more aspects thereof) can be used in combination with each other. Other embodiments can be used, such as by one of ordinary skill in the art upon reviewing the above description. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Also, in the above Detailed Description, various features can be grouped together to streamline the disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Rather, inventive subject matter can lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment, and it is contemplated that such embodiments can be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims

WHAT IS CLAIMED IS:

1. A reduced-crosstalk multiview display system, comprising: processing circuitry configured to: receive a location of a viewer; receive provisional views of a multiview image; combine the provisional views according to predetermined crosstalk- reducing coefficients to form reduced-crosstalk views of the multiview image, the crosstalk-reducing coefficients being a function of the location of the viewer; and cause a multiview display to display the reduced-crosstalk views of the multiview image, each reduced-crosstalk view being visible from a respective range of viewing angles.

2. The reduced-crosstalk multiview display system of claim 1, wherein the processing circuitry is configured to dynamically determine the ranges of viewing angles in response to the location of the viewer.

3. The reduced-crosstalk multiview display system of claim 2, wherein the multiview display is an autostereoscopic display.

4. The reduced-crosstalk multiview display system of claim 3, wherein: the provisional views include a provisional left view and a provisional right view; and the reduced-crosstalk views include a reduced-crosstalk left view and a reduced-crosstalk right view.

5. The reduced-crosstalk multiview display system of claim 4, wherein: the autostereoscopic display is configured to display the reduced- crosstalk left view such that the reduced-crosstalk left view is visible from a range of viewing angles that corresponds to a left eye of the viewer; and the autostereoscopic display is configured to display the reduced- crosstalk right view such that the reduced-crosstalk right view is visible from a range of viewing angles that corresponds to a right eye of the viewer.

6. The reduced-crosstalk multiview display system of claim 4, wherein: the crosstalk-reducing coefficients include a first crosstalk-reducing coefficient; the first crosstalk-reducing coefficient is configured to determine a same- view value and an opposite-view value; a sum of the same-view value and the opposite-view value is unity; the reduced-crosstalk left view is determined as a sum of the reduced- crosstalk left view weighted by the same-view value and the reduced-crosstalk right view weighted by the opposite-view value; and the reduced-crosstalk right view is determined as a sum of the reduced- crosstalk right view weighted by the same-view value and the reduced-crosstalk left view weighted by the opposite-view value.

7. The reduced-crosstalk multiview display system of claim 6, wherein: an absolute value of the opposite-view value is a minimum at an optimal viewing location; the optimal viewing location is a specified distance away from the multiview display at a viewing angle of ninety degrees with respect to the multiview display; and the absolute value of the opposite-view value increases at increasing distance away from the optimal viewing location.

8. The reduced-crosstalk multiview display system of claim 4, further comprising the autostereoscopic display, the autostereoscopic display being a lenticular autostereoscopic display and comprising: a display panel configured to display the multiview image; and a parallax-generating optic configured to direct light from the display panel to the viewer, such that the reduced-crosstalk left view is visible from a left eye of the viewer and the reduced-crosstalk right view is visible from a right eye of the viewer.

9. The reduced-crosstalk multiview display system of claim 8, wherein the parallax-generating optic comprises a lenticular lens, the lenticular lens including a plurality of cylindrical lenses that are equally spaced apart, the lenticular lens having a focal plane coincident with the display panel.

10. The reduced-crosstalk multiview display system of claim 8, wherein the parallax-generating optic comprises a parallax barrier, the parallax barrier including a plurality of transmissive slits that are equally spaced apart.

11. The reduced-crosstalk multiview display system of claim 1, wherein: the predetermined crosstalk-reducing coefficients include specified values at a plurality of discrete locations; the processing circuitry is further configured to perform interpolation of the specified values to determine the predetermined crosstalk-reducing coefficients at locations away from the discrete locations; and the specified values of the predetermined crosstalk-reducing coefficients are measured values obtained prior to use of the reduced-crosstalk multiview display system.

12. The reduced-crosstalk multiview display system of claim 1, wherein the processing circuitry is configured to combine the provisional views linearly in linear space.

13. The reduced-crosstalk multiview display system of claim 1, wherein the processing circuitry is further configured to combine the provisional views by, for a pixel at a specified position in the multiview image: combining pixels of the provisional views at the specified position according to the predetermined crosstalk-reducing coefficients, the predetermined crosstalk-reducing coefficients being invariant with respect to pixel location in the multiview image.

14. The reduced-crosstalk multiview display system of claim 1, wherein the processing circuitry is further configured to combine the provisional views by, for a pixel at a specified position in the multiview image: combining pixels of the provisional views at the specified position according to the predetermined crosstalk-reducing coefficients, the predetermined crosstalk-reducing coefficients varying with respect to pixel location in the multiview image.

15. The reduced-crosstalk multiview display system of claim 1, further comprising an eye tracker configured to dynamically determine the location of the viewer.

16. A method for operating a reduced-crosstalk multiview display system, the method comprising: receiving, with processing circuitry, a location of a viewer; receiving, with the processing circuitry, provisional views of a multiview image; combining, with the processing circuitry, the provisional views according to predetermined crosstalk-reducing coefficients to form reduced-crosstalk views of the multiview image, the crosstalk-reducing coefficients being a function of the location of the viewer; and causing, with the processing circuitry, a multiview display to display the reduced-crosstalk views of the multiview image, each reduced-crosstalk view being visible from a respective range of viewing angles.

17. The method of claim 16, wherein: the multiview display is an autostereoscopic display; the provisional views include a provisional left view and a provisional right view; and the reduced-crosstalk views include a reduced-crosstalk left view and a reduced-crosstalk right view.

18. The method of claim 17, further comprising: dynamically determining, with the processing circuitry, the ranges of viewing angles in response to the location of the viewer; displaying, on the autostereoscopic display, the reduced-crosstalk left view such that the reduced-crosstalk left view is visible from a range of viewing angles that corresponds to a left eye of the viewer; and displaying on the autostereoscopic display, the reduced-crosstalk right view such that the reduced-crosstalk right view is visible from a range of viewing angles that corresponds to a right eye of the viewer.

19. A reduced-crosstalk autostereoscopic display system, comprising: an autostereoscopic display configured to display a multiview image; an eye tracker configured to dynamically determine a location of a viewer; and processing circuitry configured to: receive a provisional left view and a provisional right view of the multiview image; combine the provisional left view and the provisional right view according to predetermined crosstalk-reducing coefficients to form a reduced- crosstalk left view and a reduced-crosstalk right view of the multiview image, the predetermined crosstalk-reducing coefficients being a function of the location of the viewer; and cause the autostereoscopic display to display the reduced-crosstalk left view and the reduced-crosstalk right view such that the reduced-crosstalk left view is visible from a left eye of the viewer and the reduced-crosstalk right view is visible from a right eye of the viewer.

20. The reduced-crosstalk autostereoscopic display system of claim 19, wherein: the predetermined crosstalk-reducing coefficients include specified values at a plurality of discrete locations; the processing circuitry is further configured to perform interpolation of the specified values to determine the predetermined crosstalk-reducing coefficients at locations away from the discrete locations; and the specified values of the predetermined crosstalk-reducing coefficients are measured values obtained prior to use of the reduced-crosstalk autostereoscopic display system.

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