A system for providing images to the eyes of a viewer respectively

Abstract

A system for providing images to the two eyes of a viewer separately, comprising: an array of display pixels arranged in rows and columns; an array of elongated optical elements extending parallel to each other and overlying the display pixels, wherein the optical elements are tilted at an angle with respect to the columns of display pixels. For any display pixel, the optimal luminance is determined according to the distance of the pixel to the nearest end of a boundary separating adjacent images. By adjusting the luminance of the pixels, the system can effectively reduce image crosstalk, thereby improving the clarity and quality of the naked-eye stereoscopic display.

Description

TECHNICAL FIELD

[0001] The present application relates to a system capable of dynamically adjusting brightness while reducing crosstalk phenomenon to ensure high-quality naked-eye 3D images. BACKGROUND

[0002] When using lenticular lenses to achieve naked-eye 3D image display, the goal is to clearly distinguish and direct light rays in different directions, so as to respectively transmit different images to the left and right eyes. However, crosstalk (i.e. the image intended for one eye leaks to the other eye) may occur at the image boundary, thereby causing visual interference such as ghosting. To solve this problem, the brightness of the screen pixels can be adjusted by turning off the pixels at the pitch edge, thereby reducing the crosstalk phenomenon and achieving clearer 3D display images. This technique of turning off pixels at the pitch edge is widely known in the art and is described in Chinese patent CN110662012A. However, if the range of pixels turned off is too large, it can result in a decrease in overall display brightness, and when watching 3D images, the audience may perceive a black grid pattern similar to the "screen door effect". SUMMARY

[0003] The purpose of the present application is to provide an improved naked-eye stereoscopic display device and system. The naked-eye stereoscopic display device provided by the present application comprises a group of display pixel arrays arranged in rows and columns; and a group of optical element arrays composed of a plurality of elongated optical elements extending parallel to each other and covering the display pixels, wherein the optical elements are arranged obliquely with respect to the column direction of the display pixels; for any given pixel, the optimization of brightness is determined based on the distance between the given pixel and the nearest end of the boundary separating adjacent images; the adjacent images include a plurality of pixel groups, which are observed through the optical elements, and the optical elements act as optical guiding devices to respectively guide different images to the viewer's eyes, thereby achieving naked-eye stereoscopic display.

[0004] In one embodiment, a display device for enhancing the quality of autostereoscopic display is provided. The device is capable of maintaining the brightness and clarity of the displayed images while effectively reducing the image crosstalk phenomenon by dynamically adjusting the brightness of each pixel, thereby enhancing the three-dimensional visual experience of the viewer. The display device comprises: an array of display pixels arranged in rows and columns; an array of elongated optical elements extending parallel to each other and overlaid on the array of display pixels; a memory for storing computer-readable instructions; and a processor for executing the instructions. The processor is configured to perform the following operations: obtaining the nearest distance between any display pixel and the boundary separating adjacent images. The adjacent images contain a plurality of pixel groups through which the viewer observes the images from the left and right eyes respectively, and the optical elements act as optical guides for directing different images to the viewer's eyes respectively, thereby achieving autostereoscopic display.

[0005] The processor can be further configured to calculate the optimized brightness value of the pixel according to the following equations: B = (1 + tanh(C x (D - 0.5))) / 2, where D is the ratio of the distance to the pitch of the optical elements, B is the ratio between the optimized brightness and the maximum brightness of the given pixel, and C is a control coefficient greater than 0 for adjusting the slope of the brightness curve; B = (1 + erf(a x (D - 0.5))) / 2, where D is the ratio of the distance to the pitch of the optical elements, B is the ratio between the optimized brightness and the maximum brightness of the given pixel, and a is a control coefficient greater than 0 for adjusting the steepness of the brightness transition near the image boundary; B = (arctan(pix x (D - 0.5)) / pix) + 0.5, where D is the ratio of the distance to the pitch of the optical elements, B is the ratio between the optimized brightness and the maximum brightness of the given pixel; B = (2 / pix) x arctan(tanh(C x (D - 0.5) / 2)) + 1 / 2, where D is the ratio of the distance to the pitch of the optical elements, B is the ratio between the optimized brightness and the maximum brightness of the given pixel, and C is a control coefficient greater than 0 for adjusting the slope of the brightness curve; B = (1 + e^(-C x (D - 0.5)))^(-a), where D is the ratio of the distance to the pitch of the optical elements, B is the ratio between the optimized brightness and the maximum brightness of the given pixel, and C and a are control coefficients greater than 0 for controlling the slope and sharpness of the transition near the inflection point of the curve; and where x = C x (D - 0.5), D is the ratio of the distance to the pitch of the optical elements, B is the ratio between the optimized brightness and the maximum brightness of the given pixel, and C is a control coefficient greater than 0 for adjusting the slope of the brightness curve.

[0006] Through the above design, the display device can adjust the brightness according to the position difference of the pixels relative to the image boundary, appropriately reduce the brightness of the pixels near the boundary, and keep the brightness of the central region high, so as to effectively suppress the crosstalk phenomenon and improve the display effect and viewing comfort of the stereoscopic image without sacrificing the overall image brightness.

[0007] In an embodiment, the optical element can be replaced by a liquid crystal lens. The liquid crystal lens extends along the third direction and repeatedly forms groups of display pixels separated by adjacent image boundaries. The liquid crystal lens includes a plurality of lens units for forming a plurality of groups of display pixels separated by boundaries between adjacent images. In an embodiment, the brightness is optimized to reduce crosstalk. For any display pixel, the brightness value is determined according to the distance between the nearest end of the boundary separating adjacent images. The brightness value gradually increases from the pixels at the boundary to the central pixels of each viewpoint image (the central pixels have the least crosstalk and are set to the maximum brightness). To achieve the above purpose, a liquid crystal lens is provided, including an upper substrate, a lower substrate, a liquid crystal layer sandwiched between the upper and lower substrates, and a transparent electrode layer provided on the inner surface of the upper and / or lower substrate. By applying a voltage to the liquid crystal layer through the transparent electrode layer, the orientation state of the liquid crystal molecules can be controlled as needed, so that the liquid crystal lens exhibits lens function or remains transparent in different operating modes.

[0008] In a preferred embodiment, the transparent electrode layer includes a plurality of strip-shaped electrodes arranged in parallel with each other, and the strip-shaped electrodes are pre-set with a spacing to form a plurality of lens unit regions. Each lens unit region corresponds to a lens unit in the liquid crystal layer, and the lens unit can realize lens function according to actual needs through voltage adjustment, for guiding different view angle images into the eyes of the viewer respectively. Preferably, the liquid crystal layer is a nematic liquid crystal layer, which has good electro-optic response characteristics and optical uniformity. The upper substrate and / or the lower substrate can be a glass substrate or a plastic substrate, which has good mechanical strength and light transmission performance and is suitable for various portable or fixed display devices. In specific applications, the liquid crystal lens can be arranged above the display pixel array, combined with multi-view image output technology, to guide different images to the left and right eyes of the viewer respectively, produce a stereoscopic visual effect, and realize a naked-eye 3D display experience without wearing glasses. Further, each lens unit of the liquid crystal lens can correspond to the pixel arrangement of the display pixel array, improving the accuracy and image quality of stereoscopic display. By controlling the voltage applied to the transparent electrode layer, the liquid crystal lens can realize rapid switching between lens function and transparent mode to meet different use scenario requirements.

[0009] In another preferred embodiment, a system for providing images to the left and right eyes of a viewer respectively is provided, which includes an array of display pixels arranged in rows and columns; and a lenticular lens array formed by a plurality of elongated lenticular lens elements extending parallel to each other and disposed above the array of display pixels, the display pixels being viewed through the lenticular lens array, the lenticular lens array serving as an optical guide to direct different images to the left and right eyes of the viewer respectively to achieve autostereoscopic display; wherein the pitch of the lenticular lens elements is greater than a distance between a given pixel and a nearest end of a boundary separating adjacent images in a row direction. To achieve the above-mentioned purpose, a lenticular lens structure for autostereoscopic display is provided, which includes a transparent substrate; a plurality of elongated lenticular lens elements disposed on the substrate, the lenticular lens elements extending parallel to each other in the same direction and having a predetermined pitch; wherein the lenticular lens elements have a curved optical surface for directing images emitted by an array of display pixels to the left and right eyes of a viewer respectively to achieve autostereoscopic display. Further, the cross-section of the lenticular lens elements can be semicircular, elliptical, parabolic, a shape with a predetermined curvature, or other shapes of truncated prism, trapezoidal prism, or polyhedral prism to adapt to different optical requirements. Further, the lenticular lens elements are disposed parallel to the column direction of the array of display pixels, or are inclined at a predetermined angle to the column direction to optimize the viewing angle of images and the autostereoscopic display effect. Further, the substrate is preferably made of transparent glass or transparent plastic material, including polycarbonate, polyester film, or other optically transparent materials, which have good optical transmittance and mechanical strength. Further, the lenticular lens structure can be prepared by injection molding, embossing, photolithography, ultraviolet curing, or roll coating, which is simple in process, controllable in cost, and suitable for mass production.

[0010] The proposed system effectively reduces crosstalk and improves the clarity of 3D images by dynamically adjusting the brightness of pixels according to their positions relative to the image boundaries. In a preferred embodiment, the optimized brightness is determined according to the following formula: B = 1 / (1 + e^(-C x (D - 0.5))), where C is a coefficient greater than 0, D is the ratio of the distance to the pitch of the optical elements, and B is the ratio between the optimized brightness and the maximum brightness of the given pixel. In this way, the brightness of each pixel can be finely adjusted according to the distance and the selected control coefficient C. Different control coefficients C are selected according to the characteristics of the optical elements to achieve different degrees of crosstalk suppression.

[0011] In another preferred embodiment, a display device is provided, comprising a display pixel array configured to generate images for a viewer to watch; an optical element array disposed above the display pixel array and configured to direct different images to the left and right eyes of the viewer respectively to achieve autostereoscopic perception; a memory configured to store computer instructions executable by a processor; and a processor configured to execute the instructions and further configured to: obtain a distance d between any display pixel and a nearest end of a boundary separating adjacent images; calculate a distance ratio D, defined as D=d / Lp, where Lp is a pitch of the optical element; and determine an optimized brightness value B of the display pixel according to the distance ratio D, wherein the optimized brightness value B is calculated according to a sigmoid function, which is a continuous and derivable function, and B approaches 0 when the distance ratio D approaches 0, B approaches 1 when the distance ratio D approaches 1, and has an inflection point at D=0.5, and the brightness adjustment manner can reduce crosstalk at the image boundary and improve the quality of the stereoscopic image presented to the viewer.

[0012] Other objects of the present application will be apparent to those skilled in the art from the following detailed description taken in conjunction with the preferred embodiments illustrated in the drawings. The technical solutions provided by the present application not only improve the imaging clarity of autostereoscopic display, but also retain the realizability of system structure and the flexibility of control strategy, and can be widely applied to various 3D display scenarios. The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, and to implement the content of the description, the following describes the preferred embodiments of the present application in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A schematic diagram of a conventional autostereoscopic display device.

[0014] Figure 2 An array of display pixels arranged in rows and columns.

[0015] Figure 3 An optical element can direct different images to the eyes of the viewer.

[0016] Figure 4 A pixel group composed of adjacent display pixels.

[0017] Figure 5 Determine the brightness according to the distance between a given pixel and the nearest boundary.

[0018] Figure 6 Depict a liquid crystal lens repeatedly forming a plurality of groups of display pixels and separated by boundaries.

[0019] Figure 7 It is noted that each lens unit can extend in a third direction which is perpendicular to the column direction.

[0020] Figure 8 An embodiment is shown in which the brightness of each pixel can be adjusted according to its distance and a selected control coefficient.

[0021] Figure 9 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0022] Figure 10 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0023] Figure 11 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0024] Figure 12 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0025] Figure 13 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0026] Figure 14 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0027] Figure 15 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0028] Figure 16 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0029] Figure 17 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients.

[0030] Figure 18 Another embodiment is shown in which different brightness variation curves are caused by selecting different control coefficients. DETAILED DESCRIPTION

[0031] The present application will be described in detail with reference to the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without these specific details. In other instances, well-known methods and components have not been described in detail in order to avoid unnecessarily complicating the description of the present application.

[0032] As Figure 1 and Figure 2As shown, a glasses-free stereoscopic display device includes a pixel array 3 composed of display pixels 5 arranged in rows and columns. The pixel array 3 is constructed along the row direction (X-axis) and the column direction (Y-axis). In the Z direction, perpendicular to the X and Y axes, another array composed of elongated optical elements 11 is provided. These optical elements are arranged parallel to each other and cover the pixel array 3. Figure 3 and Figure 4 As shown, display pixel 5 is observed through optical element 11. This optical design guides different images (e.g., pixel groups R1, R2, L1, L2) to the viewer's eyes respectively, thus achieving a glasses-free 3D display effect. Traditional 3D displays (such as movies) require viewers to wear polarized glasses or shutter glasses to receive images for the left and right eyes separately. Glasses-free 3D technology, however, uses the optical design of the display device itself to allow the viewer's left and right eyes to naturally receive images from different perspectives, thereby producing a stereoscopic visual effect (depth-of-view).

[0033] The optical element 11 is tilted relative to the column direction (Y-axis) of the display pixels to optimize the separation of visual information, thereby repeatedly forming pixel groups (e.g., R1, R2, L1, L2) composed of adjacent display pixels 5. Naked-eye stereoscopic display technology with a tilted structure is widely described in the prior art (e.g., US Patent 6064424A). Further related prior art can be found in International Patent Classification G02B30 / 27—Optical systems or apparatus for producing three-dimensional (3D) effects, such as using a lenticular lens array in naked-eye stereoscopic displays to provide parallax images to the left and right eyes of the viewer to achieve stereoscopic display. Additionally, reference can be made to International Patent Classification H04N13 / 317—Image reproduction apparatus for viewing without special glasses, i.e., naked-eye stereoscopic display devices employing tilted parallax optical elements.

[0034] like Figure 5 As shown, for any pixel 6 in the display pixels, its optimized brightness can be determined based on the distance d between pixel 6 and the nearest end of the "boundary 7 used to separate adjacent images" in the row direction (X-axis). As previously stated... Figure 3 and Figure 4 As shown, the adjacent images include multiple pixel groups (e.g., L1, R1, L2, R2). Viewers observe the images through these pixel groups, and the optical element, as an optical guiding device, presents different images to the viewer's eyes respectively, thereby achieving a naked-eye 3D display effect.

[0035] In another embodiment, such as Figure 6 and Figure 7As shown, the optical element can be a liquid crystal lens 8. A display device 100 can include a display panel 9 configured to generate images and having a display surface with a row direction X and a column direction Y arranged substantially perpendicular to each other; the liquid crystal lens 8 can be disposed on the display panel 9 and include a plurality of lens units 81, each of which can extend along a third direction crossing the column direction Y. The plurality of lens units 81 can repeatedly form a plurality of display pixel groups (e.g., pixel groups R1, L1) separated from each other by a boundary 7 between adjacent images. In view of this, a mathematical formula can be used to calculate the display brightness of each pixel. For any given pixel (e.g., pixel 6), the nearest distance of the boundary 7 between the pixel and an adjacent viewpoint image is measured and used as an input value in the formula. The formula is then used to determine the appropriate brightness level for the pixel. Since the central pixel of each viewpoint image produces the least crosstalk, the formula is designed to output a value of 1 when D = 1. In view of this, the optimized brightness can be determined according to the following formulas: B = (1 + tanh(C x (D - 0.5))) / 2; B = (1 + erf(a x (D - 0.5))) / 2; B = (arctan(pix x (D - 0.5)) / p) + 0.5; B = (2 / p) x arctan(tanh(C x (D - 0.5) / 2)) + 1 / 2; B = (1 + e^(-C x (D - 0.5)))^(-a); and where x = C x (D - 0.5).

[0036] where, in the above formulas: C and a are control coefficients greater than 0; D is a distance ratio, i.e., the ratio between the distance of a given pixel to the nearest boundary and the pitch Lp of the optical element (the pitch is the distance between the boundaries 7 separating adjacent images composed of different pixel groups, as shown); and B is the ratio between the optimized brightness of any given pixel and the maximum brightness of the pixel. Depending on the characteristics of the optical element, different control coefficients C can be selected to achieve different degrees of crosstalk suppression effect. Figure 6

[0037] In a preferred embodiment, C is set to be greater than 10, because when C exceeds this threshold value, it can be ensured that the output value is close to 1 when D = 1 (see Figure 8 ​, according to the formula B = (1 + tanh(C x (D - 0.5))) / 2). However, the control coefficient C can still be adjusted according to actual requirements. For example, C can be set to 30, and when C increases, the brightness transition becomes steeper. In the row direction X, the central pixel of each view image is subjected to the least crosstalk, and is therefore set to the highest brightness. Starting from the pixels close to the boundary 7, the brightness of each pixel gradually increases. For example, the pixels between the boundary 7 and the central pixel are set to a brightness lower than that of the central pixel of the corresponding image. Starting from the pixels near the boundary, the brightness of each pixel can gradually increase, and the pixels between any boundary and any central pixel can be set to a brightness lower than that of the central pixel of the image.

[0038] In further embodiments, the function can also use the error function (erf) or the arctangent function (arctan), for example, see Figure 9 : B = (1 + erf(a x (D - 0.5))) / 2, where a is a positive control coefficient that controls the slope of the brightness transition. The solid line in the figure corresponds to a = 10, indicating a relatively gentle change in brightness; the dashed line corresponds to a = 30, indicating a relatively steep change at the image boundary. As can be seen from the figure, the larger the value of a, the more concentrated the inflection region, which helps to control the brightness decay at the image boundary and thus reduce crosstalk. In another embodiment (see Figure 10 ), the function can be: B = (arctan(pi x (D - 0.5)) / pi) + 0.5. The above functions are all continuously differentiable S-shaped curves with inflection point characteristics, which can achieve smooth transition of pixel brightness and thus effectively reduce visual interference at the image boundary.

[0039] In other embodiments, the function can be the Gudermannian function, which is expressed as: B = 2 / pi x arctan(tanh(C(D - 0.5) / 2)) + 1 / 2, where C is a positive control coefficient that controls the slope of the brightness change. See Figure 11 , the dashed line represents C = 5, corresponding to a relatively gentle brightness transition; the solid line represents C = 20, indicating a more steep brightness change at the boundary. As shown in the figure, a larger C value makes the transition region more concentrated, which can quickly reduce the brightness at the image boundary to reduce crosstalk. In another embodiment (see Figure 12 ), the function can be the generalized logistic function, which is expressed as: B = (1 + e^(-C(D - 0.5)))^(-a), where C and a are positive constants that control the curvature. When the values of a or C increase, the slope of the curve near the inflection point also increases accordingly.

[0040] Another example function is: B = x / sqrt(1 + x^2), where x = C(D - 0.5), as shown in Figure 13As shown, the dashed line corresponds to C=5, and the solid line corresponds to C=20. As the value of C increases, the luminance change around D=0.5 becomes steeper, indicating that the luminance change in the image boundary region becomes more drastic. Each of the above functions has the characteristics of S-shape, continuous differentiability, and suitability for luminance adjustment, and can be used to reduce crosstalk and improve the image quality of a naked-eye stereoscopic display system.

[0041] In one embodiment, referring to Figure 14 and Figure 15 , a system for providing different images (e.g., pixel groups L1, R1, L2, R2) to the eyes of a viewer to achieve a naked-eye stereoscopic display, the system comprising: the naked-eye stereoscopic display device, which includes a device for generating a display image, the image comprising an array of display pixels arranged in rows and columns; and an array of a plurality of elongated columnar lens elements 13 extending parallel to each other and overlying the array of display pixels, the display pixels being viewed through the columnar lens elements, which act as optical directing devices for directing the different images to the eyes of the viewer to achieve a naked-eye stereoscopic display effect; wherein the pitch Lp of the columnar lens elements 13 in the row direction (X-axis) is greater than the distance d between the nearest end of the boundary between any pixel and the adjacent image.

[0042] In view of the above, the system further comprises the step of calculating the ratio B between the optimized luminance and the maximum luminance, wherein the ratio is calculated according to the following formula: B=1 / (1+e^(-C×(D-0.5))). In the formula, C is a coefficient greater than 0; D is the distance ratio, i.e., the ratio of the distance between a given pixel and the nearest boundary to the pitch Lp of the optical elements (i.e., the pitch for separating the boundary between adjacent images composed of different pixel groups); and B is the ratio between the optimized luminance and the maximum luminance of any pixel. In short, the naked-eye stereoscopic display system comprises an array of display pixels arranged in rows and columns, and an array of columnar lens optical elements. The optical elements have a pitch Lp that is greater than the distance d of the pixel to the boundary, and can direct different images to the eyes of the viewer to achieve a 3D display effect without the need for wearing glasses.

[0043] In view of the above, as Figure 16 , Figure 17 and Figure 18As shown, a naked-eye stereoscopic display device 200 can include: a display pixel array 201 arranged in rows and columns; and an optical element array 202 composed of a plurality of elongated optical elements extending in parallel to each other and covering the display pixels, wherein for any given pixel, its optimized brightness is determined based on the distance between the given pixel and the nearest end of the boundary separating adjacent images; the adjacent images include a plurality of pixel groups, which are observed through the optical elements, and the optical elements serve as optical guides to direct different images to the viewer's left and right eyes respectively, thereby achieving naked-eye stereoscopic display. To improve flexibility in practical applications, a processor can automatically select different types of S-shaped functions and their corresponding parameters according to the device type, viewing distance, parallax requirement, or dynamic characteristics of the display content. For example, when playing stereoscopic videos with rapid changes, a tanh function can be selected and the control coefficient can be increased to achieve a faster brightness transition; while in the scenario of static display or mixed text and graphics, a sigmoid or erf function can be selected to obtain a more stable brightness transition effect. In addition, the S-shaped function can also be pre-stored in the memory in the form of a lookup table (LUT), and when displaying images, the processor can quickly look up the corresponding brightness adjustment value according to the distance ratio D calculated in real time, thereby improving the operation efficiency and reducing the power consumption.

[0044] In another embodiment, a display device 200 for implementing naked-eye stereoscopic display is provided. The display device 200 includes: a display pixel array 201 arranged in rows and columns for generating images for a viewer to watch; an optical element array 202 arranged above the display pixel array 201, wherein the optical elements 13 (belonging to the optical element array 202) are elongated structures extending in parallel to each other and are configured to direct different images (such as pixel groups L1, R1, L2, R2) to the left and right eyes of the viewer respectively, thereby achieving naked-eye stereoscopic perception; a memory 203 for storing instructions executed by a processor 204; and a processor 204 for executing the instructions, the processor being configured to perform the following steps: (1) for any display pixel 901, obtaining the distance d between the pixel 901 and the nearest end of the boundary separating adjacent images; (2) calculating the distance ratio D = d / Lp, where Lp is the pitch of the optical elements 13, as shown in the figure, which is greater than the distance of the pixel to the nearest end of the boundary of the adjacent image in the row direction; (3) based on the distance ratio D, determining the optimized brightness value B of the pixel 901, wherein B is calculated according to a monotonically increasing S-shaped function, which is continuously derivable, when D tends to 0, B tends to 0; when D tends to 1, B tends to 1, and has an inflection point at D = 0.5. Figure 17

[0045] ​By using the S-shaped brightness adjustment function, the pixels near the center of the image have higher brightness, while the pixels near the image boundary have relatively lower brightness. This configuration helps to reduce the crosstalk artifacts in stereoscopic image display, and improves the image clarity and stereoscopic perception effect. In short, the device includes a display pixel array, an elongated optical element, a memory, and a processor. The processor can calculate the optimized brightness value of the pixel according to the distance between the pixel and the nearest boundary using the above formula. The steps performed by the above components include: obtaining the distance d of the pixel to the boundary separating adjacent images; calculating the brightness ratio B using a predetermined formula (S-shaped function); and adjusting the brightness according to the calculation result to reduce crosstalk and improve 3D display clarity.

[0046] The present application can improve the display quality of naked-eye stereoscopic display in the above manner: a system is provided, which can effectively guide different images to the viewer's eyes to enhance the 3D viewing experience; the brightness of the pixel is optimized according to the distance between the pixel and the adjacent image boundary to reduce the crosstalk phenomenon; a calculation model is introduced to dynamically determine the optimized brightness value using mathematical formula; a display device with a memory and a processor is developed for automatic brightness optimization; a pixel brightness calculation and control method is established for outputting 3D images to ensure clearer stereoscopic vision effect. The above is only various embodiments of the present application, which cannot limit the scope of implementation. Any simple equivalent changes and modifications made in accordance with the content of the patent range and patent specification are still within the scope of this patent.

Claims

1. A system for providing images to the eyes of a viewer separately, characterized in that The system comprises: an array of display pixels arranged in rows and columns; and a lenticular lens array of a plurality of elongated lenticular lens elements extending parallel to each other and disposed above the array of display pixels, the array of display pixels being viewed through the lenticular lens array, the lenticular lens array acting as an optical directing means to direct different images to the viewer's eyes respectively to achieve autostereoscopic display; wherein a pitch Lp of the lenticular lens elements is greater than a distance d between a nearest end of a given pixel to a border (7) separating adjacent images in a row direction; and an optimized brightness value of the given pixel is determined based on the distance and according to a formula B = 1 / (1 + e^(-C × (D - 0.5))), wherein C is a coefficient greater than 0, D is a ratio of the distance relative to the pitch, D = d / Lp, and B is a ratio between the optimized brightness value and a maximum brightness value of the given pixel.

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